High-stability air bag pump

Abstract

The utility model discloses a high-stability air bag pump, and belongs to the technical field of liquid conveying pumps. The air bag pump comprises a box body, a center shaft and two air bags located on the two sides of the box body. A liquid phase flow cavity is arranged between the two air bags and the box body, the central shaft is clamped between the two air bags, and the central shaft is arranged in the middle of the box body in a penetrating manner and is movably connected with the box body; the outer wall of the central shaft between the air bag and the box body is in contact with liquid in the liquid phase flowing cavity; a spiral flow guide groove extending in the length direction of the center shaft is formed in the outer wall, making contact with liquid, of the center shaft so as to guide the liquid to flow spirally. According to the air bag pump, through the improvement of the specific structure, the problem of local pressure change in the liquid flowing cavity caused by the center shaft can be effectively solved, and the protection effect on the air bag wall or the box body wall is further enhanced.

Description

Technical Field

[0001] This application belongs to the field of liquid transfer pump technology and relates to a high-stability wind bag pump. Background Technology

[0002] The central shaft is a key component for power transmission in the airbag pump. Part of its outer wall is placed within the liquid flow chamber. When liquid flows through this part, the central shaft provides some resistance, causing liquid to circulate around the shaft. The liquid velocity decreases near the shaft wall and increases slightly further away. This can lead to localized pressure changes, increasing the pressure on the airbag wall or housing wall, potentially damaging the pipe walls and shortening their service life. It can also affect the stability of the medication. Utility Model Content

[0003] To address the aforementioned issues, this application proposes a highly stable airbag pump. Through specific structural improvements, this airbag pump effectively reduces localized pressure variations within the liquid flow chamber caused by the central shaft, further enhancing the protection of the airbag wall or housing wall.

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

[0005] A highly stable airbag pump includes: a housing, a central shaft, and two airbags located on both sides of the housing;

[0006] A liquid flow chamber is provided between the two air bags and the housing. The central shaft is sandwiched between the two air bags and passes through the middle of the housing, and is movably connected to the housing. The outer wall of the central shaft between the air bags and the housing is in contact with the liquid in the liquid flow chamber.

[0007] A spiral guide groove extending along the length of the central axis is provided on the outer wall in contact with the liquid to guide the liquid to produce a spiral flow.

[0008] Optionally, the depth and width of the spiral guide groove are both 0.2-5mm.

[0009] Optionally, a flow divider is provided on the surface of the spiral flow guide groove, and the height of the flow divider is 0.2-0.5 times the depth of the spiral flow guide groove.

[0010] Furthermore, the direction in which the diverter plate is positioned forms a certain angle with the spiral direction of the spiral guide groove.

[0011] Optionally, the outer wall of the housing near the central axis is provided with a corrugated curve.

[0012] Optionally, the end of the central shaft is connected to the air bag by a ball joint.

[0013] Optionally, a buffer block is provided at the end of the central shaft, and the buffer block is connected to the air bag as a whole.

[0014] Furthermore, the material of the buffer block is the same as that of the air bag; the buffer block has a cavity inside, and a spiral elastic element is fixedly installed in the cavity, the length direction of the spiral elastic element is the same as the movement direction of the central axis.

[0015] Optionally, the elastic element includes a fluororubber elastic element, a hydrogenated nitrile rubber elastic element, or a silicone rubber elastic element.

[0016] Optionally, the central shaft is connected to the housing with a clearance fit.

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

[0018] 1. The spiral guide groove provided in this application, which is set on the outer wall of the central axis, will transform the original flow of liquid around the central axis into a regular spiral flow. This can enhance the mixing effect of the liquid and help reduce the local pressure changes caused by the flow around the central axis, thereby reducing the pressure on the wind bag wall or the box wall and extending its service life. On the other hand, it also avoids the stability problems caused by the pressure difference of the liquid.

[0019] 2. Furthermore, a flow divider is provided on the surface of the spiral guide channel, the height of which is 0.2-0.5 times the depth of the spiral guide channel. The flow divider is positioned at a certain angle to the spiral direction of the spiral guide channel. When liquid flows through the flow divider, it is guided to laterally divert in the spiral direction of the guide channel, enhancing mixing at different radial positions. This improves the degree of liquid mixing and helps reduce local pressure changes caused by flow around the liquid.

[0020] 3. Furthermore, corrugated curves are provided on the outer wall of the tank near the central axis. This allows the liquid to pass over the central axis at a certain angle, resulting in a weaker impact force compared to the flow direction perpendicular to the central axis, thereby reducing the degree of flow around the central axis. Attached Figure Description

[0021] 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:

[0022] Figure 1 This is a schematic diagram of the overall structure of the wind bag pump in this application;

[0023] Figure 2 This is a schematic diagram of the central shaft of the wind bag pump in this application;

[0024] Figure 3 for Figure 2 An enlarged view of part A.

[0025] List of components and reference numerals:

[0026] 1. Central shaft, 101. Spiral guide groove, 102. Diverter plate, 2. Airbag, 3. Liquid flow chamber, 4. Corrugated curve, 5. Buffer block, 501. Spiral elastic element. Detailed Implementation

[0027] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] As a specific implementation method, such as Figure 1-3 As shown, a high-stability airbag 2 pump is characterized by comprising: a housing, a central shaft 1, and two airbags 2 located on both sides of the housing;

[0035] A liquid flow chamber is provided between the two air bags 2 and the box body. The central shaft 1 is sandwiched between the two air bags 2 and passes through the middle of the box body and is movably connected to the box body. The outer wall of the central shaft 1 between the air bags 2 and the box body is in contact with the liquid in the liquid flow chamber.

[0036] A spiral guide groove 101 extending along the length of the central shaft 1 is provided on the outer wall in contact with the liquid to guide the liquid to generate a spiral flow.

[0037] In this embodiment, the depth and width of the spiral guide groove 101 are both 0.5 mm.

[0038] In practical use, when the liquid in the liquid phase flow chamber passes through the central shaft 1, the spiral guide groove 101 set on the outer wall of the central shaft 1 will transform the original flow of the liquid around the central shaft 1 into a regular spiral flow. This can enhance the mixing effect of the liquid and also help reduce the local pressure changes caused by the flow around the central shaft 1, thereby reducing the pressure on the wall of the wind bag 2 or the box wall and extending its service life. On the other hand, it also avoids the stability problem caused by the pressure difference of the liquid.

[0039] In a preferred embodiment, the depth and width of the spiral guide groove 101 are both 0.2-5 mm. This depth ensures sufficient mixing of the liquid under spiral flow without affecting the strength of the central shaft 1.

[0040] As a preferred implementation method, such as Figure 2-3 As shown, a flow divider 102 is provided on the surface of the spiral guide channel 101, and the height of the flow divider 102 is 0.2-0.5 times the depth of the spiral guide channel 101. Furthermore, the flow divider 102 is arranged at a certain angle to the spiral direction of the spiral guide channel 101.

[0041] When the liquid flows through the flow divider plate 102, it will be guided to generate lateral flow in the spiral direction of the flow guide groove, which will enhance the mixing of the liquid at different radial positions. This will enhance the degree of liquid mixing and help reduce local pressure changes caused by the flow around the liquid.

[0042] As a preferred implementation method, such as Figure 1 As shown, the outer wall of the box near the central axis 1 is provided with a corrugated curve 4. This allows the liquid to pass through the central axis 1 at a certain angle, resulting in a weaker impact force compared to the flow direction perpendicular to the central axis 1, thereby reducing the degree of flow around the central axis.

[0043] In a preferred embodiment, the end of the central shaft 1 is connected to the air bag 2 via a ball joint. This ball joint connection allows the air bag 2 to rotate and swing freely relative to the central shaft 1 within a certain range, effectively reducing the impact of bending moment on the central shaft 1 and lowering the possibility of bending deformation or fatigue damage due to large bending moments. It also reduces local pressure changes in the liquid near the central shaft 1.

[0044] As a preferred implementation method, such as Figure 2As shown, a buffer block 5 is provided at the end of the central shaft 1, and is connected to the air bag 2 as a whole through the buffer block 5. Furthermore, the material of the buffer block 5 is the same as that of the air bag 2; the buffer block 5 has an internal cavity, and a spiral elastic element 501 is fixedly installed in the cavity. The length direction of the spiral elastic element 501 is the same as the direction of movement of the central shaft 1 (that is, its two ends are close to the ends of the air bag 2 and the central shaft 1, respectively). Thus, the central shaft 1 and the air bag 2 can be elastically connected. During the reciprocating motion of the central shaft 1, when the central shaft 1 collides with the air bag 2, the presence of the buffer block 5 can buffer the impact, greatly reducing the stress between the air bag 2 and the central shaft 1, and avoiding unnecessary friction. The structure of the spiral elastic element 501 can, on the one hand, enhance the buffering effect between the central shaft 1 and the air bag 2 like a spring, thereby reducing the stress and wear on the central shaft 1, and thus weakening the local pressure changes of the liquid near the central shaft 1.

[0045] Furthermore, the buffer block 5 and the elastic element are made of the same material, including fluororubber elastic elements, hydrogenated nitrile rubber elastic elements, and silicone rubber elastic elements. Elastic elements and buffer blocks 5 made of this material have the advantages of high corrosion resistance and wear resistance.

[0046] In a preferred embodiment, the central shaft 1 is connected to the housing with a clearance fit.

[0047] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. 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.

[0048] 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 high-stability wind bag pump, characterized in that, include: The box body, the central shaft, and two airbags located on both sides of the box body; A liquid flow chamber is provided between the two air bags and the housing. The central shaft is sandwiched between the two air bags and passes through the middle of the housing, and is movably connected to the housing. The outer wall of the central shaft between the air bags and the housing is in contact with the liquid in the liquid flow chamber. A spiral guide groove extending along the length of the central axis is provided on the outer wall in contact with the liquid to guide the liquid to generate a spiral flow.

2. The airbag pump according to claim 1, characterized in that, The depth and width of the spiral guide groove are both 0.2-5mm.

3. The airbag pump according to claim 1, characterized in that, The surface of the spiral guide channel is provided with a flow divider plate, the height of which is 0.2-0.5 times the depth of the spiral guide channel.

4. The airbag pump according to claim 3, characterized in that, The direction in which the flow divider is positioned forms a certain angle with the spiral direction of the spiral guide groove.

5. The airbag pump according to claim 1, characterized in that, The outer wall of the box near the central axis is provided with a corrugated curve.

6. The airbag pump according to claim 1, characterized in that, The end of the central shaft is connected to the air bag by a ball joint.

7. The airbag pump according to claim 1, characterized in that, A buffer block is provided at the end of the central shaft, and the buffer block is connected to the air bag as a whole.

8. The airbag pump according to claim 7, characterized in that, The buffer block is made of the same material as the airbag; the buffer block has a cavity inside, and a spiral elastic element is fixedly installed in the cavity, the length direction of the spiral elastic element is the same as the movement direction of the central axis.

9. The airbag pump according to claim 8, characterized in that, The spiral elastic element includes fluororubber elastic elements, hydrogenated nitrile rubber elastic elements, and silicone rubber elastic elements.

10. The airbag pump according to claim 1, characterized in that, The central shaft is connected to the housing with a clearance fit.

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