One-way valve and aerostat having the same

Abstract

The present invention provides a one-way valve and an aerostat having the same, wherein the one-way valve comprises: a bottom plate, on which a first flow hole is arranged; a valve plate, which is movably arranged on the bottom plate in a direction perpendicular to the bottom plate, and which has a stop-flow position and a flow-through position, wherein when the valve plate is in the stop-flow position, the valve plate abuts against the bottom plate and covers the first flow-through hole, and when the valve plate is in the flow-through position, a gap is formed between the valve plate and the bottom plate, and the gap is connected to the other side of the bottom plate facing away from the valve plate through the first flow-through hole; a connecting structure, wherein the first end of the connecting structure is connected to the valve plate, and the second end of the connecting structure cooperates with the bottom plate to connect the valve plate to the bottom plate. The technical solution of the present invention solves the problem that the one-way valve in the prior art is not suitable for the airbag structure.

Description

Technical Field

[0001] The present invention relates to the technical field of flight equipment, and in particular to a one-way valve and an aerostat having the same. Background Art

[0002] The aerostat has multiple independent capsules, including the main airbag, auxiliary airbag, fairing and tail, as well as some independent capsules formed due to design or process reasons, such as air chambers and tail main airbag interlayers. Between these capsules, in order to achieve specific goals or special requirements, it is sometimes required that the gas in some capsules automatically flow to the low-pressure capsule when the pressure is greater than the pressure of another capsule, but the gas cannot flow in the opposite direction. In this case, the use of a one-way valve is an inevitable choice. There are various one-way valves in the prior art. However, these one-way valves have some defects when applied to the capsules.

[0003] First, these hard one-way valves are difficult to install on soft skin materials, and there is a problem of gas leakage at the welding joints after installation. Specifically, the one-way valves currently on the market are made of metal and plastic, and can be used on a variety of products, but they are all made of hard materials, with a small diameter and a large length, and are in the shape of a long cylinder. The material of the bladder is generally a composite material with a thickness of less than 1mm. During the installation process, these one-way valves need to be installed on the bladder better through some auxiliary materials and bonding technology, but it is difficult and prone to low air tightness. Secondly, there is a height difference between the hard one-way valve and the skin, which can easily pierce the contacting skin. Specifically, during the use of the bladder, since the bladder will undergo multiple packaging and folding operations, those one-way valves will damage the bladder material in these processes, causing damage to the bladder material, or even piercing the bladder skin material. Summary of the invention

[0004] The main purpose of the present invention is to provide a one-way valve and an aerostat having the same, so as to solve the problem that the one-way valve in the prior art is not suitable for an airbag structure.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a one-way valve is provided, comprising: a bottom plate, on which a first flow hole is arranged; a valve plate, which is movably arranged on the bottom plate in a direction perpendicular to the bottom plate, and the valve plate has a stop-flow position and a flow-through position, wherein when the valve plate is in the stop-flow position, the valve plate abuts against the bottom plate and covers the first flow-through hole, and when the valve plate is in the flow-through position, a gap is formed between the valve plate and the bottom plate, and the gap is connected to the other side of the bottom plate facing away from the valve plate through the first flow-through hole; a connecting structure, wherein a first end of the connecting structure is connected to the valve plate, and a second end of the connecting structure cooperates with the bottom plate to connect the valve plate to the bottom plate.

[0006] Furthermore, a guide hole is provided on the bottom film, and the connection structure includes a connection column, and the connection column is passed through the guide hole.

[0007] Furthermore, a positioning head is provided at the second end of the connecting column, and the positioning head prevents the connecting column from falling out of the guide hole.

[0008] Furthermore, the connection structure includes a connection rope, and two ends of the connection rope are respectively connected to the valve plate and the bottom plate.

[0009] Furthermore, the first end of the connecting structure is arranged at the center of the valve plate, and the second end of the connecting structure is arranged at the center of the bottom plate.

[0010] Furthermore, there are a plurality of first flow holes, and the plurality of first flow holes are arranged at intervals along the circumferential direction of the second end of the connecting structure.

[0011] Furthermore, the sum of the areas of the plurality of first flow holes is smaller than the area of ​​the valve plate.

[0012] Furthermore, the one-way valve also includes: a cover plate, which is covered on the valve plate and connected to the bottom plate, a second flow hole is provided on the cover plate, and a flow cavity is formed between the cover plate and the bottom plate, and the flow cavity communicates with the outside through the second flow hole.

[0013] Furthermore, the edge of the cover sheet is connected to the bottom sheet.

[0014] Furthermore, the second flow hole is arranged corresponding to the valve plate, and the area of ​​the second flow hole is smaller than the area of ​​the valve plate.

[0015] Furthermore, the second flow hole is located at the center of the cover plate.

[0016] Furthermore, central axes of the bottom plate, the valve plate and the cover plate coincide with each other.

[0017] Furthermore, the bottom plate and the cover plate are both made of soft materials, and the valve plate is made of soft materials.

[0018] According to another aspect of the present invention, there is provided an aerostat, comprising a bladder and a one-way valve arranged on the bladder, wherein the one-way valve is the one-way valve mentioned above.

[0019] Further, the bladder body includes a skin, and a bottom sheet of the one-way valve is arranged on the skin, or the skin serves as the bottom sheet.

[0020] Furthermore, the capsule includes a first capsule and a second capsule connected to each other, the one-way valve is arranged at the connection between the first capsule and the second capsule, and the valve sheet of the one-way valve is arranged on the inner surface of the first capsule or on the inner surface of the second capsule.

[0021] By applying the technical solution of the present invention, the valve sheet is connected to the base sheet through a connecting structure. The base sheet and the valve sheet are both sheet-like structures, so the overall structure of the one-way valve is thinner, thereby reducing the probability of the one-way valve damaging the skin after being installed on the airbag. At the same time, by setting the base sheet to the same material as the skin or a similar material, the base sheet can be more easily connected to the skin, and at the same time, the air tightness is good. The one-way valve of the present invention is more suitable for use in an airbag structure, so the technical solution of the present invention solves the problem that the one-way valve in the prior art is not suitable for use in an airbag structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic structural diagram of a one-way valve according to a first embodiment of the present invention is shown;

[0024] Figure 2 Shows Figure 1 A schematic diagram of the structure of the bottom plate of the one-way valve;

[0025] Figure 3 Shows Figure 1 A schematic diagram of the structure of the valve plate and the connection structure of the one-way valve;

[0026] Figure 4 Shows Figure 1 A top view of the one-way valve;

[0027] Figure 5 Shows Figure 1 A schematic cross-sectional view of the one-way valve; and

[0028] Figure 6 A cross-sectional schematic diagram of a second embodiment of a one-way valve according to the present invention is shown.

[0029] The above drawings include the following reference numerals:

[0030] 10. Bottom plate; 11. First flow hole; 12. Guide hole; 20. Valve plate; 30. Connecting structure; 31. Positioning head; 40. Cover plate; 41. Second flow hole; 50. Flow cavity; 100. One-way valve. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] like Figure 1As shown, the one-way valve of the first embodiment includes a bottom plate 10, a valve plate 20 and a connecting structure 30. The bottom plate 10 is provided with a first flow hole 11. The valve plate 20 is movably provided on the bottom plate 10, and the valve plate 20 has a stop position abutting against the bottom plate 10 and covering the first flow hole 11, and a flow position having a gap with the bottom plate 10 and allowing the two sides of the bottom plate 10 to communicate through the first flow hole 11. The first end of the connecting structure 30 is connected to the center position of the valve plate 20, and the second end of the connecting structure 30 cooperates with the bottom plate 10 to connect the valve plate 20 to the center position of the bottom plate 10.

[0033] By applying the technical solution of this embodiment, the valve sheet 20 is connected to the bottom sheet 10 through the connecting structure 30. The bottom sheet 10 and the valve sheet 20 are both sheet-like structures, so the overall structure of the one-way valve is thinner, thereby reducing the probability of the one-way valve damaging the skin after being installed on the airbag. At the same time, by setting the bottom sheet 10 to the same material as the skin or a similar material, the bottom sheet 10 can be more easily connected to the skin, and the air tightness is good. The one-way valve of this embodiment is more suitable for the airbag structure, so the technical solution of this embodiment solves the problem that the one-way valve in the prior art is not suitable for the airbag structure.

[0034] like Figure 3 and Figure 5 As shown, in the technical solution of the first embodiment, the bottom plate 10 is provided with a guide hole 12, and the connecting structure 30 includes a connecting column, which is inserted into the guide hole 12. Specifically, after the connecting column is inserted into the guide hole 12, it can slide along the side wall of the guide hole, thereby achieving the effect of the valve plate 20 covering the first flow hole 11 and opening the first flow hole 11. Specifically, from Figure 5 It can be seen that when the fluid flows from the top to the bottom of the bottom plate 10, the fluid flows into the first flow hole 11 and impacts the valve plate 20 to move away from the bottom plate 10. The valve plate 20 moves downward (away from the bottom plate 10) under the impact force, and the connecting column and the guide hole 12 guide the movement of the valve plate 20 and prevent the valve plate 20 from moving deflected. At this time, there is a gap between the valve plate 20 and the bottom plate 10, so that the two ends of the first flow hole 11 are connected to the two ends of the bottom plate 10 respectively, that is, the gap is connected to the other side of the bottom plate facing away from the valve plate through the first flow hole, so that the fluid can flow smoothly from the upper side of the bottom plate 10 to the lower side.

[0035] When the fluid flows into the one-way valve from the side of the valve plate 20 facing away from the bottom plate 10, the fluid impacts the valve plate 20 to make the valve plate 20 move toward the bottom plate 10. After the valve plate 20 is impacted, the valve plate 20 moves upward (toward the direction of the bottom plate 10), and then the valve plate 20 abuts against the bottom plate 10, thereby closing the first flow hole 11. At this time, the fluid cannot pass through the one-way valve from the side of the valve plate 20 facing away from the bottom plate 10, thereby achieving a flow limiting effect. The above two processes realize one-way flow of the one-way valve and reverse flow restriction. Preferably, the connecting column in this embodiment is a cylinder, and correspondingly, the guide hole 12 is a circular hole.

[0036] like Figure 5 As shown, in the technical solution of the first embodiment, a positioning head 31 is provided at the second end of the connecting column, and the positioning head 31 prevents the connecting column from coming out of the guide hole 12. Specifically, the positioning head 31 prevents the connecting column from coming out of the guide hole 12. Figure 5 It can be seen that the diameter of the positioning head 31 is larger than the size of the guide hole 12, and the positioning head 31 and the valve plate 20 are respectively located on both sides of the bottom plate 10. That is, the positioning head 31 and the valve plate 20 limit the connecting column from both sides respectively. In embodiment one, the positioning head 31 can be set in a variety of ways. For example, the positioning head 31 can be installed on the second end of the connecting column by connecting screws and other structures. Alternatively, the positioning head 31 and the connecting column are an integral structure. When the positioning head 31 and the connecting column are an integral structure, the positioning head 31 can be formed by the following process: When the connecting column is made of metal material, the positioning head 31 can be formed by stamping and riveting process. When the connecting column is made of plastic material, the positioning head 31 can be formed by injection molding process.

[0037] Of course, in the technical solution of the first embodiment, it is not necessary to set a positioning head structure on the connecting head. Those skilled in the art can understand that when the connecting column is set to be long enough, the valve plate 20 can be prevented from falling off from the bottom plate 10 due to the covering and limiting of the cover plate 40. Specifically, when the length of the connecting column protruding from the bottom plate 10 is greater than the distance of the valve plate 20 movement, the above purpose can be achieved.

[0038] like Figure 2 and Figure 3 As shown, in the technical solution of the first embodiment, the valve plate 20 is a circular plate, and the first end of the connecting structure 30 is connected to the middle of the valve plate 20. Specifically, the above structure enables the valve plate 20 to substantially maintain force balance when impacted by the fluid, thereby enabling the connecting column to move along the extension direction of the guide hole 12, preventing the connecting column and the valve plate 20 from deflecting, and improving the working reliability of the product.

[0039] like Figure 2 and Figure 5As shown, in the technical solution of the first embodiment, there are multiple first flow holes 11, and the sum of the areas of the multiple first flow holes 11 is smaller than the area of ​​the valve plate 20. Specifically, in order for the one-way valve to work normally and realize the one-way conduction function, the setting of the multiple first flow holes should meet the following two conditions:

[0040] First, if Figure 5 As shown, when the valve plate 20 is in the stop state, the valve plate 20 can block all the first flow holes 11. That is, the valve plate 20 is projected onto the bottom plate 10 to have a first projection surface, and each of the multiple first flow holes 11 is located in the first projection surface. The above structure makes it impossible for the fluid to pass through the first flow holes 11 when the valve plate 20 is in the stop state, thereby achieving the stop effect.

[0041] Secondly, if Figure 5 As shown, when the valve plate 20 is in a flow state, the positioning head 31 will not block the first flow hole 11. That is, the positioning head 31 has a second projection surface after being projected onto the bottom plate 10, and each of the multiple first flow holes 11 is located outside the above-mentioned second projection surface. The above structure ensures that when the valve plate is in a flow state, the positioning head 31 will not block the first flow hole 11, and thus the unidirectional conduction function can be normally realized. Preferably, when the valve plate 20 is in a flow state, if the positioning head 31 blocks part of the first flow hole 11, the unidirectional conduction function can also be realized, but the flow area will be greatly affected.

[0042] from Figure 5 It can be seen that an annular structure is formed between the first projection plane and the second projection plane. Preferably, the plurality of first flow holes 11 are all located in the annular structure.

[0043] like Figure 1 and Figure 4 As shown, in the technical solution of the first embodiment, a plurality of first flow holes 11 are arranged at equal angles along the circumference of the second end of the connecting structure 30. Specifically, the first flow holes 11 are circular holes. The above structure enables the fluid to exert an impact force uniformly on the circumference of the valve plate 20 after flowing out of the first flow holes 11, thereby preventing the valve plate 20 and the connecting column from skewing and moving, thereby ensuring the structural stability of the one-way valve.

[0044] like Figure 1 and Figure 4As shown, in the technical solution of the first embodiment, the one-way valve further includes a cover plate 40. The cover plate 40 is arranged on the bottom plate 10 and covers the outside of the valve plate 20. The cover plate 40 is provided with a second flow hole 41, and a flow cavity 50 is formed between the cover plate 40 and the bottom plate 10. Specifically, the cover plate 40 protects the valve plate 20. At the same time, the second flow hole 41 allows the fluid to pass smoothly, thereby ensuring that the one-way valve realizes the one-way conduction function. Figure 5 As shown, when the fluid flows from the top to the bottom of the bottom plate 10, the fluid first flows through the first flow hole 11 and then flows into the flow cavity 50, and then flows to the lower side of the bottom plate 10 through the second flow hole 41. When the fluid flows from the bottom to the top of the bottom plate 10, the fluid impacts the lower surface of the valve plate 20 after passing through the second flow hole 41, thereby causing the valve plate 20 to move upward and close the first flow hole 11. Furthermore, the second flow hole 41 is set at the center position of the cover plate 40. Specifically, the above-mentioned "center position" refers to the position where the center of the bottom plate, the valve plate and the cover plate itself is located, that is, the center axis of the second flow hole 41 and the center axis of the cover plate 40 are arranged to coincide.

[0045] like Figure 1 and Figure 5 As shown, in the technical solution of the first embodiment, the cover sheet 40 is a circular sheet. The edge of the cover sheet 40 is connected to the bottom sheet 10. Specifically, in this embodiment, after the cover sheet 40 is installed on the bottom sheet 10, it should still be possible to ensure that the valve sheet 20 can move freely and does not interfere with the movement of the valve sheet 20. When the cover sheet 40 is made of a hard material, the thickness of the side wall of the cover sheet 40 should be large enough to ensure that there is still a gap between the valve sheet 20 and the cover sheet 40 when the valve sheet 20 is in the flow position, so as to prevent the valve sheet 20 from closing the second flow hole 41. When the cover sheet 40 is made of a soft material (such as cloth), sufficient deformation space needs to be reserved in the middle of the cover sheet 40 to prevent the cover sheet 40 from interfering with the movement of the valve sheet 20.

[0046] like Figure 5 As shown, in the technical solution of the first embodiment, the second flow hole 41 is located above the valve plate 20. Specifically, when the fluid flows from the bottom to the top of the bottom plate 10, the fluid first passes through the second flow hole 41. After passing through the second flow hole 41, the fluid can first impact the valve plate 20, thereby ensuring that the valve plate 20 can be quickly closed. Preferably, the flow area of ​​the second flow hole 41 is smaller than the area of ​​the valve plate 20. And the projection of the second flow hole 41 toward the valve plate 20 is located inside the valve plate 20. The above structure enables the fluid passing through the second flow hole 41 to quickly close the valve plate 20 when the fluid flows from the bottom to the top of the bottom plate, thereby ensuring the action sensitivity of the one-way valve.

[0047] Preferably, the bottom plate 10 and the cover plate 40 in the first embodiment are made of soft materials. For example, the bottom plate 10 and the cover plate 40 are made of composite soft materials such as aramid fiber. Further, the valve plate 20 is made of soft rubber material, such as silicone, rubber, etc.

[0048] like Figure 6 As shown, the difference between the second embodiment and the first embodiment of the one-way valve according to the present application is that the connection structure 30 includes a connection rope, and the two ends of the connection rope are respectively connected to the valve plate 20 and the bottom plate 10. Specifically, the upper end of the connection rope is connected to the bottom plate 10, and the lower end of the connection rope is connected to the valve plate 20. The connection rope prevents the valve plate 20 from being separated from the bottom plate 10.

[0049] Preferably, if Figure 6 As shown, in the technical solution of the second embodiment, the multiple first flow holes 11 are arranged closer to each other. Preferably, the distance between the first flow hole 11 in the second embodiment and the central axis of the bottom plate 10 is smaller than the distance between the first flow hole 11 and the central axis of the bottom plate 10 in the first embodiment. Those skilled in the art can understand that, since the connecting rope has a length, when the valve plate 20 is upwardly covered on the lower surface of the bottom plate 10, the center line of the valve plate 20 and the center line of the bottom plate 10 may not coincide. That is, the valve plate 20 may be offset. The maximum offset position of the valve plate 20 depends on the length of the connecting rope. Therefore, the multiple first flow holes 11 in the second embodiment are arranged more closely to ensure that the valve plate 20 can still completely cover the multiple first flow holes 11 even when the valve plate 20 is offset to the maximum.

[0050] Furthermore, in order to ensure that the valve plate 20 can normally open or close the first flow hole 11, in this embodiment, the center line of the bottom plate 10, the center line of the valve plate 20 and the center line of the cover plate 40 are all located on the same straight line.

[0051] The present application also provides an aerostat. According to the first embodiment of the aerostat of the present application, the aerostat includes a bladder and a one-way valve 100 disposed on the bladder. The one-way valve 100 is the one-way valve mentioned above.

[0052] In the technical solution of the first embodiment, the bladder body includes a skin, and the bottom sheet 10 of the one-way valve 100 is arranged on the skin. Specifically, for the convenience of arrangement, the bottom sheet 10 and the cover sheet 40 of the one-way valve can be made of the same material as the skin, or made of a material similar to the skin. Further, the skin is provided with a flow hole and is arranged corresponding to the first flow hole 11 of the one-way valve. Preferably, the bottom sheet 10 can be connected to the skin by welding, bonding, etc., so as to ensure the airtightness between the bottom sheet 10 and the skin.

[0053] In the technical solution of the first embodiment, the capsule includes a first capsule and a second capsule, the one-way valve 100 is arranged between the first capsule and the second capsule, the two ends of the first flow hole of the one-way valve 100 are respectively connected to the internal space of the first capsule and the internal space of the second capsule, and the valve plate of the one-way valve 100 is located in the first capsule or the second capsule. Specifically, the above structure can meet some special airflow requirements of the airship. Specifically, if the airship requires that when the pressure of the first capsule is greater than the pressure of the second capsule, the airflow can flow from the first capsule to the second capsule, and the airflow cannot flow in the reverse direction, the valve plate 20 is arranged in the second capsule. On the contrary, if the airship requires that when the pressure of the second capsule is greater than the pressure of the first capsule, the airflow can flow from the second capsule to the first capsule, and the airflow cannot flow in the reverse direction, the valve plate 20 is arranged in the first capsule.

[0054] The difference between the second embodiment and the first embodiment of the aerostat according to the present application is that the skin forms the bottom plate 10. Specifically, part of the skin forms the bottom plate 10 of the one-way valve, and the first flow hole 11 of the one-way valve is arranged on the skin. Further, the cover plate 40 of the one-way valve can be made of the same material as the skin, or a material similar to the skin. Preferably, the edge of the cover plate 40 can be connected to the skin by bonding, welding, etc.

[0055] The above description is combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The above description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0058] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A one-way valve, characterized in that: include: A bottom plate (10), wherein the bottom plate (10) is provided with a first flow hole (11); a valve plate (20), the valve plate (20) being movably arranged on the bottom plate (10) in a direction perpendicular to the bottom plate (10), the valve plate (20) having a stop flow position and a flow flow position, wherein when the valve plate (20) is in the stop flow position, the valve plate (20) abuts against the bottom plate (10) and covers the first flow flow hole (11), and when the valve plate (20) is in the flow flow position, a gap is formed between the valve plate (20) and the bottom plate (10), and the gap is connected to the other side of the bottom plate (10) facing away from the valve plate (20) through the first flow flow hole (11); a connecting structure (30), wherein a first end of the connecting structure (30) is connected to the valve plate (20), and a second end of the connecting structure (30) cooperates with the bottom plate (10) to connect the valve plate (20) to the bottom plate (10); The bottom sheet (10) is provided with a guide hole (12), and the connection structure (30) comprises a connection column, wherein the connection column is inserted into the guide hole (12); A positioning head (31) is provided at the second end of the connecting column, and the positioning head (31) prevents the connecting column from falling out of the guide hole (12); Alternatively, the connection structure (30) comprises a connection rope, and two ends of the connection rope are respectively connected to the valve plate (20) and the bottom plate (10); a cover plate (40), the cover plate (40) being disposed on the valve plate (20) and connected to the bottom plate (10), the cover plate (40) being provided with a second flow hole (41), and a flow cavity (50) being formed between the cover plate (40) and the bottom plate (10), the flow cavity (50) being in communication with the outside through the second flow hole (41); The bottom plate (10) and the cover plate (40) are both made of soft materials, and the valve plate (20) is made of soft materials; The bottom sheet (10) is connected to the skin by welding or bonding; The edge of the cover sheet (40) is connected to the skin by bonding or welding.

2. The one-way valve according to claim 1, characterized in that: The first end of the connection structure (30) is arranged at the center position of the valve plate (20), and the second end of the connection structure (30) is arranged at the center position of the bottom plate (10).

3. The one-way valve according to claim 2, characterized in that: There are a plurality of the first flow holes (11), and the plurality of the first flow holes (11) are arranged at intervals along the circumference of the second end of the connection structure (30).

4. The one-way valve according to claim 3, characterized in that: The sum of the areas of the plurality of first flow holes (11) is smaller than the area of ​​the valve plate (20).

5. The one-way valve according to claim 1, characterized in that: The edge of the cover sheet (40) is connected to the bottom sheet (10).

6. The one-way valve according to claim 1, characterized in that: The second flow hole (41) is arranged corresponding to the valve plate (20), and the area of ​​the second flow hole (41) is smaller than the area of ​​the valve plate (20).

7. The one-way valve according to any one of claims 1, 5 and 6, characterized in that: The second flow hole (41) is located at the center of the cover plate (40).

8. The one-way valve according to claim 1, characterized in that: The central axes of the bottom plate (10), the valve plate (20) and the cover plate (40) coincide with each other.

9. An aerostat, comprising a bladder and a one-way valve (100) arranged on the bladder, characterized in that: The one-way valve (100) is the one-way valve according to any one of claims 1 to 8.

10. The aerostat according to claim 9, characterized in that: The bladder body comprises a cover skin, and a bottom sheet (10) of the one-way valve (100) is arranged on the cover skin, or the cover skin serves as the bottom sheet (10).

11. The aerostat according to claim 9, characterized in that: The sac comprises a first sac and a second sac that are connected to each other, the one-way valve (100) is arranged at the connection between the first sac and the second sac, and the valve sheet of the one-way valve (100) is arranged on the inner surface of the first sac or on the inner surface of the second sac.

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