A circulating inflation pressurization system for double-layer air film and double-layer air film

Abstract

The application relates to the technical field of air film, in particular to a circulating inflation pressurizing system for a double-layer air film and the double-layer air film. The system comprises a first electric air valve and a second electric air valve; the first electric air valve is installed on an outer retaining wall, and the second electric air valve is installed on an inner retaining wall. The pressurizing system can introduce the air in the inner film to the interlayer space for heat exchange, realizes secondary utilization of the air temperature, prevents dew condensation caused by sudden temperature change, improves the heat preservation effect, and can maintain the pressure of the interlayer space and the shape of the outer film. The double-layer air film has the advantages of good heat preservation effect, good sealing property and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air film, in particular to a circulating air inflation pressurization system for double-layer air film and double-layer air film. BACKGROUND

[0002] At present, the common form of the double-layer air film structure is to maintain the shape of the inner film by continuously sending low-temperature treated fresh air into the internal space to ensure the temperature of the internal space, and an additional air blower is arranged to send air into the interlayer between the inner film and the outer film. This circulating air inflation pressurization device is suitable for double-layer air film in low-temperature functional rooms such as ski rinks, skating rinks, cold storage rooms, etc., and is also suitable for buildings with high heat preservation requirements, such as agricultural ecological greenhouses, industrial plants with serious noise pollution, bars requiring sound insulation, etc.

[0003] However, in the above application scenarios, the existing double-layer air film has unorganized leakage through the gaps at the connection between the air film and the retaining wall, the gaps of the rotating door, and the deformation joints, resulting in increased building energy consumption. In addition, in low-temperature places such as ski rinks and skating rinks, frost, dampness, and mildew are likely to occur in the gaps and connection of the air film, leading to insufficient air pressure and energy waste due to the need to increase air pressure.

[0004] Currently, many units have researched on double-layer air film inflation equipment and air film buildings. For example, the patent for invention with the publication number CN108560717 A discloses a gas-bearing type multi-layer film building structure, which comprises an independent film, a heat preservation structure covering the independent film, and a gas bag cover covering the heat preservation structure. The gas bag cover is connected with an air inflation device and an air exhaust device, and the air inflation device is connected with the air inflation device. The air exhaust branch pipe is connected to the air exhaust manifold, and the air exhaust branch pipe is provided with an air exhaust electromagnetic valve. The independent film is connected with an independent film inflation device. Although this gas bag form can achieve good heat preservation effect, the initial cost is relatively high, and each gas bag needs to be installed with a gas collecting and exhaust pipe. The construction work amount is large, and the gas collecting pipe and the independent film are inevitably connected with gaps and leakage. The air flow in the gas bag is inevitably accompanied by resistance, and a separate air inflation device needs to be set up. This can easily cause energy waste, complex construction process, and excessive initial investment. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a circulating air inflation pressurization system for double-layer air film and double-layer air film.

[0006] The technical solution of the present application to solve the above technical problem is as follows:

[0007] The application provides a circulating inflation pressurization system for a double-layer air film, the double-layer air film comprising an outer film and an inner film inside the outer film, with a sandwich space between the two; the outer film and the inner film are fixed by an outer retaining wall and an inner retaining wall respectively; comprising a first electric air valve and a second electric air valve; the first electric air valve is installed on the outer retaining wall, and the second electric air valve is installed on the inner retaining wall.

[0008] The application has the beneficial effects that: the first electric air valve and the second electric air valve are arranged on the outer retaining wall and the inner retaining wall respectively, the air inside the inner film can be introduced into the sandwich space, the air can exchange heat with the original air in the sandwich space, the secondary utilization of the air temperature is realized, the temperature gradient is formed among the outside of the outer film, the sandwich space and the inside space of the inner film, the air in the inner film is buffered in the sandwich space in the process of circulating to the outside of the outer film, the problem of dew caused by sudden temperature change is prevented, the heat preservation effect is improved, and the pressure of the sandwich space and the shape of the outer film are maintained.

[0009] On the basis of the above technical scheme, the application can be further improved as follows.

[0010] Further, mounting holes are formed in the outer retaining wall and the inner retaining wall, a wall penetrating sleeve is fixedly sleeved in the mounting hole, and an air pipe is fixedly sleeved in the wall penetrating sleeve, both ends of the air pipe being located outside the wall penetrating sleeve.

[0011] The first electric air valve is installed on the air pipe on the outer retaining wall, and the second electric air valve is installed on the air pipe on the inner retaining wall.

[0012] The beneficial effects of the above further scheme are that the stable installation of the electric air valve is ensured by the above device.

[0013] Further, a heat preservation material layer is fixedly sleeved between the wall penetrating sleeve and the air pipe.

[0014] The beneficial effects of the above further scheme are that the heat preservation effect of the air valve installation position is improved.

[0015] Further, the first electric air valve and the second electric air valve are oppositely arranged.

[0016] The beneficial effects of the above further scheme are that the circulating time of the air in the sandwich space can be improved, so that sufficient heat exchange is realized.

[0017] Further, the application further comprises a first pressure sensing device and a second pressure sensing device; the first pressure sensing device is fixed on the outer film and is circuit-connected with the first electric air valve; and the second pressure sensing device is fixed on the inner film and is circuit-connected with the second electric air valve.

[0018] The beneficial effect of the above further scheme is that the valve opening of the air valve can be controlled according to the pressure sensed by the pressure sensing device.

[0019] Further, the first air charging device is located outside the double-layer air film and communicates with the inner space of the inner film through a pipeline.

[0020] The beneficial effect of the above further scheme is that the first air charging device charges the inner space of the inner film and indirectly charges the interlayer space through the second electric air valve.

[0021] Further, the second air charging device is located outside the outer film, and a flexible air hose is fixed to the outside of the outer film, one end of the flexible air hose communicates with the second air charging device, and the other end is a closed end, a plurality of air inlet holes are formed on the outer film, and a plurality of air vent holes corresponding to the air inlet holes are formed on the wall of the flexible air hose close to the other end.

[0022] The beneficial effect of the above further scheme is that this can avoid the problem of excessive air speed, thereby avoiding the problem of excessive local pressure of the inner film caused by air supply, and avoiding the problem of inner film collapse, and uniform air supply to the interlayer space can be realized.

[0023] The application also provides a double-layer air film with the above-mentioned circulating air charging and pressurizing system.

[0024] The beneficial effect of the above scheme is that the double-layer air film has good heat preservation, sealing, and is not prone to damp and mildew, and has the advantages of low construction cost and simple construction process.

[0025] Further, the membrane body of the outer film and the outer retaining wall, and the inner film and the inner retaining wall are fixedly connected through sealing connecting membrane assemblies respectively.

[0026] The beneficial effect of the above further scheme is to further improve the sealing property.

[0027] Further, the outer surface of the inner film is fixed with a heat preservation layer, and the outer surface of the heat preservation layer is fixed with a vapor barrier layer; the heat preservation layer and the vapor barrier layer are located in the interlayer space; the heat preservation layer comprises a plurality of multilayer centrifugal glass wool, and the plurality of centrifugal glass wool is staggered and bonded

[0028] The beneficial effect of the above further scheme is to further improve the heat preservation property. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a longitudinal sectional view of the circulating air charging and pressurizing system of the double-layer air film of the application;

[0030] Figure 2 The partial structure diagram of the installation position of the second electric air valve in the double-layer air film circulation air charging and pressurizing system of the present application;

[0031] Figure 3 The installation structure diagram of the second air charging device, the flexible air pipe and the dehumidifying device in the double-layer air film circulation air charging and pressurizing system of the present application;

[0032] Figure 4 The partial sectional view of the outer film, the heat insulation layer, the vapor barrier layer and the inner film in the double-layer air film circulation of the present application;

[0033] Figure 5 The partial structure diagram of the installation position of the inner film and the inner retaining wall in the double-layer air film circulation of the present application.

[0034] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0035] 1, outer film; 10, first electric air valve; 101, first air charging device; 102, second air charging device; 11, outer retaining wall; 110, wall penetrating sleeve; 111, air pipe; 112, heat insulation material layer;

[0036] 2, inner film; 20, second electric air valve; 21, inner retaining wall;

[0037] 3, heat insulation layer; 4, vapor barrier layer; 5, first pressure sensing device; 6, second pressure sensing device; 7, flexible air pipe;

[0038] 8, sealing and connecting film assembly; 81, extruded heat insulation board; 82, angle steel; 83, connecting column; 84, double nut; 85, gasket;

[0039] 9, dehumidifying device. DETAILED DESCRIPTION

[0040] The principles and features of the present application are described below in combination with the drawings, and the examples are only used to explain the present application, and are not used to limit the scope of the present application.

[0041] As shown in the drawings, Figure 1 The double-layer air film circulation air charging and pressurizing system of the present application includes an outer film 1 and an inner film 2 located inside the outer film 1, and has a sandwiched space between the two; the outer film 1 and the inner film 2 are fixed by an outer retaining wall 11 and an inner retaining wall 21, respectively; the circulation air charging and pressurizing system includes a first electric air valve 10 and a second electric air valve 20; the first electric air valve 10 is installed on the outer retaining wall 11, and the second electric air valve 20 is installed on the inner retaining wall 21.

[0042] The double-layer air film circulating inflation pressurizing system of the present application sets the first electric air valve 10 and the second electric air valve 20 on the outer retaining wall 11 and the inner retaining wall 21 respectively, so as to introduce the air inside the inner film 2 into the interlayer space, which can exchange heat with the original air in the interlayer space, realize secondary utilization of the air temperature, form a temperature gradient among the outside of the outer film 1, the interlayer space and the inside of the inner film 2, and buffer the air in the inner film 2 in the interlayer space during the circulation of the air out of the outer film 1, so as to prevent the problem of dew caused by sudden temperature change, improve the heat preservation effect, and maintain the pressure of the interlayer space and the shape of the outer film 1.

[0043] The above structure of the double-layer air film circulating inflation pressurizing system of the present application does not need to fill the air bag, has small air resistance, can reduce the power of the inflation device, effectively reduces the cost and saves energy, and can ensure good circulation of the air in the double-layer air film.

[0044] It should be noted that the electric air valve is a device commonly used in the art, which can be used as a device for adjusting the flow or cutting off the gas medium.

[0045] Preferably, the outer retaining wall 11 and the inner retaining wall 21 are provided with mounting holes, a wall bushing 110 is fixedly sleeved in the mounting hole, an air pipe 111 is fixedly sleeved in the wall bushing 110, and both ends of the air pipe 111 are located outside the wall bushing 110; the first electric air valve 10 is installed on the air pipe 111 on the outer retaining wall 11, and the second electric air valve 20 is installed on the air pipe 111 on the inner retaining wall 21; the above device can ensure stable installation of the electric air valve.

[0046] For example, as shown in Figure 2 Preferably, a heat preservation material layer 112 is fixedly sleeved between the wall bushing 110 and the air pipe 111; the air pipe 111 can be heat preserved, so as to prevent dew from easily occurring at the position of the air pipe 111 due to the temperature difference between the inside and outside of the film, heat preserve the air pipe 111, and prevent mildew.

[0047] Waterproof vapor barrier film tape and moisture absorbing filling layer are also arranged at the positions of the mounting holes of the outer retaining wall 11 and the inner retaining wall 21, and the specific positions of the two can be set according to the actual situation, so as to further improve the sealing and waterproof and moisture-proof properties of the positions.

[0048] Preferably, the waterproof vapor barrier film tape is located in the interlayer space, and the moisture absorbing filling layer is close to the interlayer space, so as to make the environment in the interlayer space more dry.

[0049] Preferably, the first electric air valve 10 and the second electric air valve 20 are oppositely arranged; the circulation time of the air in the interlayer space can be improved, so as to realize sufficient heat exchange.

[0050] Preferably, a plurality of first electrically operated air valves 10 can be provided, each of which is installed in the outer retaining wall 11 through a mounting hole; the provision of a plurality of first electrically operated air valves 10 can improve the efficiency of air circulation and maintain the shape of the outer membrane and a certain pressure gradient in the case of severe weather.

[0051] Preferably, the first pressure sensing device 5 and the second pressure sensing device 6 are further included; the first pressure sensing device 5 is fixed to the outer membrane 1 and is electrically connected to the first electrically operated air valve 10; the second pressure sensing device 6 is fixed to the inner membrane 2 and is electrically connected to the second electrically operated air valve 20; so that the valve opening of the air valve can be controlled according to the pressure sensed by the pressure sensing device; for example, when the weather is rainy and snowy or the wind load increases, the pressure sensing device on the outer membrane 1 senses the change in pressure, and the first electrically operated air valve 10 can adjust the valve opening according to the change in pressure.

[0052] Preferably, the first pressure sensing device 5 and the second pressure sensing device 6 each include at least one pressure sensor; further preferably, the pressure sensor is a plurality of pressure sensors that are uniformly spaced and fixed to the outer membrane 1 or the inner membrane 2.

[0053] Preferably, the first temperature sensing device and the second temperature sensing device are further included; the first temperature sensing device is fixed to the outer membrane 1 and is electrically connected to the first electrically operated air valve 10; the second temperature sensing device is fixed to the inner membrane 2 and is electrically connected to the second electrically operated air valve 20. The temperature sensing device can also control the opening of the electrically operated air valve, but the priority of the pressure sensing device for controlling the two electrically operated air valves is higher than that of the temperature sensing device.

[0054] Preferably, the two electrically operated air valves are further interlocked with a backup air blower. When the electrically operated air valve is overloaded or has other faults, the electrically operated air valve can automatically cut off the power supply and issue a warning, at which time the backup air blower is opened by interlocking. The backup air blower can continue to be used to inflate the interlayer space.

[0055] Preferably, the first electrically operated air valve 10 and the second electrically operated air valve 20 can also be installed with an anti-condensation detection alarm; making it particularly suitable for use in low-temperature spaces such as snow rinks.

[0056] Preferably, in the air film building with sound insulation function, dehumidifying agents or dehumidifying components can be arranged on the first electrically operated air valve 10 and the second electrically operated air valve 20; since the lower the humidity of the air, the better the sound insulation effect, therefore, the arrangement of dehumidifying agents or the installation of dehumidifying components can improve the sound insulation effect.

[0057] As Figure 1As shown, preferably, the first air charging device 101 is located outside the double-layer air film and communicates with the inner space of the inner film 2 through a pipeline; the first air charging device 101 can adopt the form of underground air duct air supply or above-ground side air supply.

[0058] As shown in the drawings, Figure 3 As shown, further preferably, the above-ground side air supply refers to arranging the air supply pipeline on the belt; specifically, in one embodiment of the present application, the second air charging device 102 is further included, and the second air charging device 102 can adopt the form of above-ground air supply; in this embodiment, the circulation system further includes a flexible air pipe 7 fixed to the outside of the outer film 1; one end of the flexible air pipe 7 communicates with the second air charging device 102, and the other end is a closed end; the second air charging device 102 is located outside the outer film 1; a plurality of air inlet holes are arranged on the outer film 1, and the pipe wall close to the other end of the flexible air pipe 7 is provided with air inlet holes corresponding to the air inlet holes one by one; in this way, the problem of excessively high wind speed can be avoided, so that the air supply does not cause the inner film 2 to collapse due to excessively high local pressure, and uniform air supply to the interlayer space can be realized.

[0059] Preferably, the first electric air valve 10 can be directly opened to the outside of the outer film 1 or can communicate with the energy recovery device, so that the heat carried by the air circulating in the interlayer space can be recovered.

[0060] Preferably, the first air charging device 101 and the second air charging device 102 are fixed with a dehumidification device 9, which dehumidifies the air before air supply, so as to ensure that the air entering the inner film 2 and the air entering the interlayer space is dry.

[0061] The double-layer air film has the circulation air charging and pressurizing system as described above; the double-layer air film has the advantages of stable pressure and energy saving.

[0062] As shown in the drawings, Figure 4 Preferably, the interlayer space is provided with a heat preservation layer 3, the heat preservation layer 3 is fixed to the outer surface of the inner film 2, and the outer surface of the heat preservation layer 3 is fixed with a vapor barrier layer 4; the heat preservation layer 3 can achieve good heat preservation of the inner film 2 and prevent heat loss of the air in the inner film 2; the vapor barrier layer 4 can prevent the condensed water in the air in the interlayer space from adhering to the heat preservation layer 3 and avoid invalidation of the heat preservation layer 3.

[0063] Preferably, the heat preservation layer 3 includes a plurality of multilayer centrifugal glass wools, and the plurality of centrifugal glass wools are staggered and bonded; so that the heat preservation layer 3 has good heat preservation effect.

[0064] Preferably, the membrane body of the outer film 1 or the inner film 2 is fixed with the retaining wall through a sealing and membrane connecting assembly 8; so as to ensure the sealing and heat preservation of the inner space of the inner film 2.

[0065] In theory, any device capable of sealing the joint gap between the membrane body and the retaining wall can achieve the above function, and the sealing structure can adopt the form of a sealing ring, a sealing plate, a sealing strip, etc., and the specific shape can be set according to the specific situation.

[0066] However, since the sealing between the membrane body and the retaining wall has an important influence on the air pressure in the double-layer air membrane, in an embodiment of the present application, a specific sealing membrane connecting assembly 8 and its related structure are provided:

[0067] As shown in Figure 5 , the sealing membrane connecting assembly 8 includes an extruded insulation board 81, an angle steel 82, and a connecting column 83; the upper part of the retaining wall is provided with a groove, the extruded insulation board 81 is fixed in the groove, and a pre-compressed expansion sealing tape and polyurethane sealant are arranged between the edge of the extruded insulation board 81 and the inner wall of the groove. The edge of the membrane body is located between the angle steel 82 and the extruded insulation board 81, and the elastic connection of the angle steel 82 and the extruded insulation board 81 fixes the membrane body on the retaining wall.

[0068] In this embodiment, the connecting column 83 is fixed in the groove, and the extruded insulation board 81, the membrane body, and the angle steel 82 are all provided with holes for the connecting column 83 to pass through. The connecting column 83 is provided with threads, and a double nut 84 is installed, and the elastic connection of the angle steel 82 and the extruded insulation board 81 can be achieved by tightening the double nut 84, thereby fixing the membrane body.

[0069] Further preferably, a gasket 85 is arranged between the double nut 84 and the angle steel 82.

[0070] The air circulation process in the double-layer air membrane of the present application is described below through specific embodiments:

[0071] Embodiment 1

[0072] In the double-layer air membrane circulation inflation pressurization system of this embodiment, a first electric air valve 10 and a second electric air valve 20 are included, as well as a first inflation device 101, and the first inflation device 101 adopts the form of underground shaft air supply.

[0073] The air circulation process in the double-layer air membrane of this embodiment is that the first inflation device 101 supplies air into the inner membrane 2, so that air is filled into the inner membrane 2; at the same time, air is filled into the interlayer space through the second electric air valve 20, and the space of the double-layer air membrane structure is filled with air. The air entering the interlayer space from the inner membrane 2 circulates in the interlayer space to the first electric air valve 10 for discharge, and during the circulation in the interlayer space, the air and the inner membrane 2 continuously exchange heat, so that the temperature of the air continues to be utilized.

[0074] Embodiment 2

[0075] The double-layer air film circulation pressurizing system of the embodiment comprises a first electric air valve 10 and a second electric air valve 20, a first air feeding device 101, a second air feeding device 102 and a soft air pipe 7. The first air feeding device 101 is in the form of underground air feeding. The soft air pipe 7 is fixed to the outside of the outer film 1, one end of which is communicated with the second air feeding device 102 and the other end is a closed end. A plurality of air inlet holes are formed on the outer film 1 and a plurality of air outlet holes corresponding to the air inlet holes are formed on the wall of the soft air pipe 7 close to the other end.

[0076] The air circulation process in the double-layer air film of the embodiment is as follows: the first air feeding device 101 and the second air feeding device 102 are started simultaneously to feed air into the inner film 2 and the interlayer space respectively, so that air is filled into the inner film 2 and the interlayer space simultaneously; meanwhile, the air in the inner film 2 enters the interlayer space through the second electric air valve 20. The air in the interlayer space is circulated to be discharged through the first electric air valve 10, and when the air is circulated in the interlayer space, the air and the inner film 2 exchange heat continuously, so that the temperature of the air is continuously utilized.

[0077] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0078] In addition, the terms “first” and “second” are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “a plurality of” is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0079] In the present application, unless otherwise explicitly specified and limited, the “on” or “under” of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the “above”, “over” and “on” of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The “below”, “under” and “under” of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0080] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined and integrated by those skilled in the art without contradiction.

[0081] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circulating inflation pressurization system for a double-layer air film, the double-layer air film comprising an outer film (1) and an inner film (2) located inside the outer film (1), with a sandwich space between the two; the outer film (1) and the inner film (2) are fixed by an outer retaining wall (11) and an inner retaining wall (21) respectively; characterized in that, Includes a first electric air valve (10) and a second electric air valve (20); The first electric air valve (10) is installed on the outer retaining wall (11), and the second electric air valve (20) is installed on the inner retaining wall (21); Both the outer retaining wall (11) and the inner retaining wall (21) are provided with mounting holes. A through-wall sleeve (110) is fixedly sleeved in the mounting hole. A duct (111) is fixedly sleeved in the through-wall sleeve (110). Both ends of the duct (111) are located outside the through-wall sleeve (110). The first electric air valve (10) is installed on the air duct (111) on the outer retaining wall (11), and the second electric air valve (20) is installed on the air duct (111) on the inner retaining wall (21); The first electric air valve (10) and the second electric air valve (20) are arranged opposite to each other.

2. A cyclic pressurization system for a double-layer air supported membrane as defined in claim 1, wherein, A thermal insulation material layer (112) is fixedly sleeved between the wall sleeve (110) and the air duct (111).

3. A cyclic pressurization system for a double-layer air-supported membrane as claimed in claim 1 or 2, characterized in that, It also includes a first pressure sensing device (5) and a second pressure sensing device (6). The first pressure sensing device (5) is fixed on the outer membrane (1) and is connected to the first electric air valve (10) in the circuit; the second pressure sensing device (6) is fixed on the inner membrane (2) and is connected to the second electric air valve (20) in the circuit.

4. The cyclic pressurization system for a double-layer air-supported membrane as claimed in claim 1 or 2, wherein, It also includes a first inflation device (101), which is located outside the double-layer air membrane and is connected to the internal space of the inner membrane (2) through a pipeline.

5. A cyclic pressurization system for a double-layer air-supported membrane as defined in claim 4, wherein, It also includes a second inflation device (102) and a flexible air duct (7) located outside the outer membrane (1); The flexible air duct (7) is fixed to the outside of the outer membrane (1); one end of the flexible air duct (7) is connected to the second inflation device (102), and the other end is a closed end; multiple air inlets are provided on the outer membrane (1), and ventilation holes corresponding to the air inlets are provided on the pipe wall of the flexible air duct (7) near the other end.

6. A double layer air film, characterized by, It has a cyclic inflation and pressurization system as described in any one of claims 1 to 5.

7. A double layer air supported membrane according to claim 6, wherein, The outer membrane (1) and the outer retaining wall (11), and the inner membrane (2) and the inner retaining wall (21) are respectively fixedly connected by a sealing membrane assembly.

8. The double-layer air film according to claim 6, wherein The outer surface of the inner membrane (2) is fixed with a heat insulation layer (3), and the outer surface of the heat insulation layer (3) is fixed with a vapor barrier layer (4); the heat insulation layer (3) and the vapor barrier layer (4) are both located in the interlayer space; the heat insulation layer (3) includes multiple layers of centrifugal glass wool, and the multiple centrifugal glass wool are bonded together in a staggered manner.

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