Air bag assembly and air bag pump

Abstract

The utility model discloses an air bag assembly and an air bag pump, and belongs to the technical field of pump body equipment. According to the air bag assembly, an airflow resistance reduction mechanism is located at the corner of the inner wall of a U-shaped bag body and makes contact with a gas phase flowing cavity; the airflow resistance reduction mechanism comprises a first resistance reduction coating making contact with air and a second resistance reduction coating arranged above the first resistance reduction coating and making contact with the corner of the inner wall of the U-shaped bag body. According to the air bag assembly, the specific component is arranged at the bent position of the inner wall of the U-shaped air bag, so that the gas flowing resistance at the bent position in the U-shaped channel in the gas phase flowing cavity in the contraction and relaxation process is effectively avoided, and the gas retention phenomenon is reduced.

Description

Technical Field

[0001] This application belongs to the field of pump body equipment technology, specifically relating to a wind bag assembly and a wind bag pump. Background Technology

[0002] Most airbag pumps now use U-shaped airbags; the U-shaped structure enhances the pump's self-priming capability. However, the internal structure of the U-shaped airbag makes the gas flow path relatively complex. During the airbag's contraction and expansion, the flow resistance distribution of gas in the gas phase flow chamber within the U-shaped channel is uneven; when eddies and stagnation occur at the corners of the U-shaped channel, this leads to unstable pump output flow. For applications requiring high flow accuracy, such as precise gas proportioning in chemical experiments and precise gas delivery in medical equipment, this flow fluctuation is highly detrimental. Utility Model Content

[0003] To address the aforementioned issues, this application proposes an airbag assembly and an airbag pump. This airbag assembly, by incorporating specific components at the bends in the inner wall of the U-shaped airbag, effectively avoids resistance to gas flow at the bends (corners) within the U-shaped channel of the gas flow chamber during contraction and relaxation, thereby reducing gas stagnation.

[0004] The specific technical solution of this application is as follows:

[0005] This application provides a wind bag assembly, including: a U-shaped bag body and an airflow drag reduction mechanism; the airflow drag reduction mechanism is located at the corner of the inner wall of the U-shaped bag body and is in contact with the gas phase flow cavity;

[0006] The airflow drag reduction mechanism includes a first drag reduction coating that contacts the gas and a second drag reduction coating disposed above the first drag reduction coating and in contact with the corner of the inner wall of the U-shaped bladder.

[0007] Optionally, the first drag-reducing coating includes a nano-silica coating, and the second drag-reducing coating includes a polytetrafluoroethylene coating.

[0008] Optionally, the thickness of both the first drag-reducing coating and the second drag-reducing coating is between 0.1 and 0.3 mm.

[0009] Optionally, the first drag-reducing coating has a first stabilizing groove on the side that contacts the second drag-reducing coating, and the second drag-reducing coating has a first stabilizing block that cooperates with the first stabilizing groove on one side.

[0010] A second stabilizing groove is provided on the other side of the second drag-reducing coating; a second stabilizing block that cooperates with the second stabilizing groove is provided at the corner of the inner wall of the U-shaped bladder.

[0011] Furthermore, each surface of the first stabilizing groove and the second stabilizing groove is provided with an adhesive layer.

[0012] Optionally, the radius of the rounded corner at the corner of the U-shaped bladder is 0.5-0.8 times the width of the inner wall of the U-shaped bladder.

[0013] Optionally, both the first drag-reducing coating and the second drag-reducing coating are arc-shaped to match the inner wall of the U-shaped bladder.

[0014] Furthermore, both the first and second drag-reducing coatings are designed to gradually thin from the middle to both ends, so as to achieve a seamless connection with the corner of the inner wall of the U-shaped bladder.

[0015] Furthermore, the ends of both the first and second drag-reducing coatings are pointed.

[0016] The wind bag pump described in this application includes: a pump body, a partition disposed in the center of the pump body; the pump body is divided into two symmetrical first working chambers and second working chambers by the partition; the wind bag assembly is respectively installed in the first working chamber and the second working chamber; and gas phase fluid chamber and liquid phase fluid chamber are respectively disposed on both sides of the wind bag assembly.

[0017] The beneficial effects that this application may produce include, but are not limited to:

[0018] 1. The airflow drag reduction mechanism provided in this application can reduce the surface energy of the wall surface at the bend of the U-shaped channel of the wind bag in the gas phase cavity. When gas molecules approach the bend wall surface, due to this lower adhesion force, the gas molecules can leave the wall surface more quickly instead of lingering near the wall surface, which can greatly reduce gas stagnation and eddy current phenomena. At the same time, it has strong adhesion, and the coating will not peel off or delaminate when the U-shaped wind bag is subjected to vibration or deformation during expansion or contraction.

[0019] 2. Furthermore, the radius of the rounded corners at the turns of the U-shaped capsule is 0.5-0.8 times the width of the inner wall of the U-shaped capsule. At this point, the radius is sufficiently large, resulting in a relatively gentle change in the curvature of the gas at the turns, thus reducing eddies caused by sharp turns. At the same time, it is not too large, which would affect the gas transport efficiency of the U-shaped capsule. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the wind bag pump in this application;

[0022] Figure 2 For this application Figure 1Enlarged view of part A (overall structural schematic diagram of the wind bag assembly of this application);

[0023] Figure 3 This is a schematic diagram of the airflow drag reduction mechanism of a local component in this application.

[0024] List of components and reference numerals:

[0025] 1. U-shaped capsule, 2. Airflow drag reduction mechanism, 201. First drag reduction coating, 202. Second drag reduction coating, 301. First stabilizing block, 302. Second stabilizing block, 4. Sharp edge, 5. Liquid phase fluid cavity, 6. Gas phase fluid cavity, 7. First working chamber, 8. Second working chamber, 9. U-shaped channel. Detailed Implementation

[0026] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0027] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0029] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0033] As a specific implementation method, such as Figure 1-3 As shown. A wind bag assembly includes: a U-shaped bag body 1 and an airflow drag reduction mechanism 2; the airflow drag reduction mechanism 2 is located at the corner of the inner wall of the U-shaped bag body 1 and is in contact with the gas flow cavity; the airflow drag reduction mechanism 2 includes a first drag reduction coating 201 in contact with the gas and a second drag reduction coating 202 disposed above the first drag reduction coating 201 and in contact with the corner of the inner wall of the U-shaped bag body 1.

[0034] Furthermore, the first drag-reducing coating 201 is a nano-silica coating, and the second drag-reducing coating 202 is a polytetrafluoroethylene coating.

[0035] The second drag-reducing coating 202 and the inner wall of the U-shaped bladder 1, as well as the first drag-reducing coating 201 and the second drag-reducing coating 202, are bonded together by adhesive.

[0036] In this embodiment, the radius of the rounded corner at the corner of the U-shaped bladder 1 is 0.6 times the diameter of the inner wall of the bladder; the thickness of the first drag-reducing coating 201 and the thickness of the second drag-reducing coating 202 are both 0.2 mm.

[0037] refer to Figure 1A wind bag pump includes: a pump body, a partition disposed in the center of the pump body; the pump body is divided by the partition into two symmetrical first working chambers 7 and second working chambers 8; the first working chambers 7 and second working chambers 8 are respectively equipped with the aforementioned wind bag assembly; and gas phase fluid chambers 6 and liquid phase fluid chambers 5 are respectively disposed on both sides of the wind bag assembly.

[0038] In specific usage, such as Figure 1 In the illustrated airbag pump, when the U-shaped airbags in the first working chamber 7 and the second working chamber 8 reciprocate in expansion and contraction, the gas in the gas phase fluid chamber 6 enters the U-shaped channel 9 along the U-shaped path. When passing through the U-shaped bend of the airbag (i.e., when entering the bend from the straight section of the airbag), the first drag-reducing coating 201 (nano-silica coating) can reduce the surface energy of the wall at the bend. When gas molecules approach the wall at the bend, due to this lower adhesion, the gas molecules can leave the wall more quickly instead of lingering near the wall, which can greatly reduce gas stagnation and eddy currents.

[0039] The second drag-reducing coating 202 (PTFE coating) fills any tiny gaps that may exist between the nano-silica coating and the inner wall of the capsule, making the bond between the two coatings tighter. When the capsule is subjected to vibration or deformation during expansion or contraction, this tight bond prevents peeling or delamination of the coatings, ensuring the integrity of the coating structure. Furthermore, the PTFE coating has an extremely low coefficient of friction, resulting in minimal resistance to gas molecule flow on its surface. Even if the nano-silica coating is damaged over long-term use, the PTFE coating can still effectively reduce airflow resistance, preventing gas turbulence and stagnation.

[0040] In a preferred embodiment, the thickness of both the first drag-reducing coating 201 and the second drag-reducing coating 202 is between 0.1 and 0.3 mm. This thickness effectively reduces airflow resistance, avoids gas turbulence and stagnation, and does not significantly change the radius of the rounded corners at the corners of the U-shaped bladder 1.

[0041] In a preferred embodiment, the first drag-reducing coating 201 has a first stabilizing groove on the side that contacts the second drag-reducing coating 202, and the second drag-reducing coating 202 has a first stabilizing block 301 that cooperates with the first stabilizing groove on one side.

[0042] A second stabilizing groove is provided on the other side of the second drag-reducing coating 202; a second stabilizing block 302 that mates with the second stabilizing groove is provided at the corner of the inner wall of the U-shaped bladder 1. Furthermore, each surface of the first and second stabilizing grooves is provided with an adhesive layer. The fixation is further enhanced by the adhesive connection between the stabilizing block and the stabilizing groove.

[0043] In a preferred embodiment, the radius of the rounded corner at the corner of the U-shaped capsule 1 is 0.5-0.8 times the width of the inner wall of the U-shaped capsule 1. This radius is sufficiently large, resulting in a relatively gentle change in the curvature of the gas at the corner, thereby reducing eddies caused by sharp turns. At the same time, it is not too large, which would affect the gas delivery efficiency of the U-shaped capsule 1.

[0044] In a preferred embodiment, both the first drag-reducing coating 201 and the second drag-reducing coating 202 are arc-shaped to fit the inner wall of the U-shaped capsule 1. Furthermore, both the first drag-reducing coating 201 and the second drag-reducing coating 202 are designed to gradually thin from the middle to both ends, achieving a seamless connection with the corners of the inner wall of the U-shaped capsule 1, avoiding gaps or steps, and better promoting gas flow velocity.

[0045] Furthermore, the ends of both the first drag-reducing coating 201 and the second drag-reducing coating 202 are pointed 4. This better provides a guiding direction and avoids blocking the gas from entering the U-shaped channel 9.

[0046] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0047] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A wind bag assembly, characterized in that, include: U-shaped bladder, airflow drag reduction mechanism; The airflow drag reduction mechanism is located at the corner of the inner wall of the U-shaped bladder and is in contact with the gas phase flow cavity; The airflow drag reduction mechanism includes a first drag reduction coating that contacts the gas and a second drag reduction coating disposed above the first drag reduction coating and in contact with the corner of the inner wall of the U-shaped bladder.

2. The airbag assembly according to claim 1, characterized in that, The first drag-reducing coating includes a nano-silica coating, and the second drag-reducing coating includes a polytetrafluoroethylene coating.

3. The airbag assembly according to claim 1, characterized in that, The thickness of both the first and second drag-reducing coatings is between 0.1 and 0.3 mm.

4. The airbag assembly according to claim 1, characterized in that, The first drag-reducing coating has a first stabilizing groove on the side that contacts the second drag-reducing coating, and the second drag-reducing coating has a first stabilizing block that cooperates with the first stabilizing groove on one side. A second stabilizing groove is provided on the other side of the second drag-reducing coating; a second stabilizing block that cooperates with the second stabilizing groove is provided at the corner of the inner wall of the U-shaped bladder.

5. The airbag assembly according to claim 4, characterized in that, An adhesive layer is provided on each surface of the first stabilizing groove and the second stabilizing groove.

6. The airbag assembly according to claim 1, characterized in that, The radius of the rounded corners at the corners of the U-shaped capsule is 0.5-0.8 times the width of the inner wall of the U-shaped capsule.

7. The airbag assembly according to claim 1, characterized in that, Both the first drag-reducing coating and the second drag-reducing coating are arc-shaped to match the inner wall of the U-shaped bladder.

8. The airbag assembly according to claim 7, characterized in that, Both the first and second drag-reducing coatings are designed to gradually thin from the middle to both ends, so as to achieve a seamless connection with the corner of the inner wall of the U-shaped bladder.

9. The airbag assembly according to claim 8, characterized in that, The ends of both the first and second drag-reducing coatings are pointed.

10. A wind-bag pump, characterized in that, include: The pump body has a partition in the center; the pump body is divided into two symmetrical working chambers, a first working chamber and a second working chamber, by the partition; the first working chamber and the second working chamber are respectively equipped with the air bag assembly as described in claim 1; and gas phase fluid chamber and liquid phase fluid chamber are respectively arranged on both sides of the air bag assembly.

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