Multi-air-bag phase distribution type air bag pump

Abstract

The utility model belongs to the technical field of air bag pumps, and particularly relates to a multi-air-bag phase distribution type air bag pump which is driven by a crankshaft, the crankshaft drives U-shaped air bags to deform through eccentric crutches and linkage devices, and the eccentric crutches correspond to the U-shaped air bags one by one and are distributed at equal angles. And it is ensured that the compression / stretching action phase differences of all the U-shaped air bags are evenly distributed, flow pulsation is greatly weakened or even eliminated, and continuous and stable conveying is achieved.

Description

A multi-airbag phase distribution airbag pump Technical Field

[0001] This utility model belongs to the field of windbag pump technology, specifically relating to a multi-windbag phase distribution windbag pump. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] In semiconductor manufacturing, high-purity chemicals, and biomedicine, high-purity fluids are frequently required. Pneumatic airbag pumps, due to their low pollution levels and resistance to acid and alkali corrosion, are widely used in high-purity corrosive fluid systems. Pneumatic airbag pumps utilize the reciprocating motion of an internal bladder to draw in and expel fluid, thus achieving liquid transport. Traditional pneumatic airbag pumps have two working chambers, each consisting of a gas phase chamber and a liquid phase chamber. Compressed air enters the gas phase chamber, causing the airbag to deform and move. A reversing structure controls the sequential flow of compressed air into the two gas phase chambers. The alternating suction and discharge of liquid in the liquid phase chamber achieves liquid transport.

[0004] During the operation of the airbag pump, when the compression process of one end of the airbag reaches its maximum value and stops, the stretching process of the other end of the airbag will also reach its maximum value and stop. At this time, the movement of the entire pump will be stopped, thus generating corresponding pulsations in the spray flow. The existence of pulsations affects the stable delivery of fluid and can also cause problems such as oscillation of downstream nozzles affecting cleaning efficiency. Existing patent 202111637673.4 discloses a multi-phase electric airbag pump, which uses multiple bellows. When the motor is started, the motor drives the drive gear to rotate, and the intermediate gear meshing with the drive gear rotates accordingly. The intermediate gear drives the linkage gear to rotate, and the linkage gear drives the bellows to stretch or compress via a linkage rod and a pull plate. Since the volume inside all the bellows is different, the intermittent liquid delivery phenomenon of the airbag pump is reduced, thereby achieving continuous liquid delivery and improving the smoothness and stability of liquid delivery. However, in this patent, the bellows are driven by the drive gear, intermediate gear, and linkage gear. The use of multiple gears affects the transmission efficiency and liquid delivery efficiency, and the use of the intermediate gear increases the size of the airbag pump. Because the linkage rod moves non-axially with the rotation of the linkage gear and drives the pull plate to move through the hinge, the lateral force generated by the linkage rod on the pull plate will cause the bellows to deflect, resulting in wear of the bellows. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multi-bladder phase-distribution airbag pump. The multi-bladder phase-distribution airbag pump is driven by a crankshaft. The crankshaft, through eccentric cranks and linkage devices that correspond one-to-one with the U-shaped airbags and are equally angularly distributed, drives the deformation of the U-shaped airbags, ensuring a uniform distribution of the phase difference between the compression / tension actions of each U-shaped airbag. This significantly reduces or even eliminates flow pulsation, achieving continuous and stable delivery.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] In a first aspect, this utility model provides a multi-airbag phase distribution airbag pump, including a pump body, at least three airbag assemblies, and a crankshaft. The airbag assemblies are connected to the pump body. Each airbag assembly includes a U-shaped airbag. The crankshaft is provided with an eccentric crank corresponding to the number of U-shaped airbags. The included angle between adjacent eccentric cranks is equal. When each eccentric crank rotates, it drives the corresponding U-shaped airbag to stretch or compress through a linkage device. The linkage device includes a linkage rod and multiple pull rods. One end of the linkage rod is hinged to the eccentric crank, and the other end of the linkage rod is hinged to one end of each pull rod at the same hinge point. The other end of each pull rod is fixedly connected to the closed end of the U-shaped airbag.

[0008] Preferably, the sum of the included angles of the eccentric bends is n*360°, where n is a positive integer.

[0009] Preferably, the included angle between the eccentric bends is 90° to 180°.

[0010] Preferably, the number of the airbag assemblies is odd.

[0011] Preferably, the hinge point between the linkage rod and the pull rod is located on the extension line of the central axis of symmetry of the corresponding U-shaped air bag, and the length of each pull rod is equal and symmetrical about the central axis of symmetry of the U-shaped air bag.

[0012] More preferably, the angle between each of the pull rods and the central axis of symmetry of the U-shaped air bag is 30° to 60°.

[0013] Preferably, the airbag assembly further includes a fixing cylinder, and the U-shaped airbag is slidably connected to the fixing cylinder.

[0014] Preferably, the pump body is provided with an inlet and an outlet, and the air bag is provided with an inlet valve and an outlet valve, each inlet valve being connected to the inlet and each outlet valve being connected to the outlet.

[0015] Preferably, it also includes a pump housing, on which the crankshaft is mounted via bearings.

[0016] Preferably, the crankshaft is rotated by a power input device.

[0017] The beneficial effects achieved by one or more technical solutions of this utility model are as follows:

[0018] At least three airbag components work together with eccentric cranks distributed at equal angles to ensure that the phase difference of the compression / tension action of each U-shaped airbag is evenly distributed. The total output flow is the sum of the instantaneous flow of the airbag components, which greatly reduces or even eliminates flow pulsation and achieves continuous and stable delivery.

[0019] By directly driving the airbag's contraction and expansion through the crankshaft and eccentric crank, the complex gear transmission chain (drive gear, intermediate gear, linkage gear) in existing technologies is eliminated, significantly improving transmission efficiency and reducing energy loss; at the same time, the space occupied by intermediate gears is avoided, reducing the overall volume of the pump body and facilitating integrated design.

[0020] The linkage rod and multiple tie rods are hinged at the same hinge point. The tie rods share the lateral force generated by the non-axial movement of the linkage rod, so that the force direction of the U-shaped air bag is always along the axial direction, which fundamentally solves the problem of air bag skew and wear and improves the service life of the air bag. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0022] Figure 1 is a schematic diagram of the multi-airbag phase distribution airbag pump in Embodiment 1 of this utility model;

[0023] In the diagram, 1 is the pump body, 2 is the air bag assembly, 3 is the crankshaft, 4 is the linkage device, 5 is the pump casing, 11 is the liquid inlet, 12 is the liquid outlet, 21 is the U-shaped air bag, 22 is the fixed cylinder, 23 is the liquid inlet valve, 24 is the liquid outlet valve, 31 is the eccentric crank, 41 is the linkage rod, and 42 is the pull rod. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model 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 of this utility model and the features thereof can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0026] Furthermore, it should be understood in the description of this utility model 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 only for the convenience of describing this utility model 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 utility model.

[0027] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly 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 utility model according to the specific circumstances.

[0029] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one 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 invention. 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 may be combined in any suitable manner in one or more embodiments or examples.

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to specific embodiments.

[0031] Example 1

[0032] As shown in Figure 1, the multi-airbag phase-distribution airbag pump includes a pump body 1, three airbag assemblies 2, a crankshaft 3, and a pump housing 5. The airbag assemblies 2 are connected to the pump body 1. The airbag assembly 2 includes a U-shaped airbag 21 and a fixed cylinder 22. The U-shaped airbag 21 is slidably connected to the fixed cylinder 22. An inlet valve 23 and an outlet valve 24 are provided inside the U-shaped airbag 21. The pump body 1 is provided with an inlet port 11 and an outlet port 12. Each inlet valve 23 is connected to the inlet port 11, and each outlet valve 24 is connected to the outlet port 24. The crankshaft 3 is mounted on the pump housing 5 through bearings (not shown) and is driven by a power input device (not shown) to achieve rotation. The crankshaft 3 is provided with three eccentric cranks 31 corresponding to the U-shaped airbags 21. Adjacent eccentric cranks 3 The included angle between each of the eccentric cranks 31 is 120°. When each eccentric crank 31 rotates, it drives the corresponding U-shaped wind bag 21 to stretch or compress through the linkage device 4. The linkage device 4 includes a linkage rod 41 and two pull rods 42. One end of the linkage rod 41 is hinged to the eccentric crank 31, and the other end of the linkage rod 41 is hinged to one end of each pull rod 42 at the same hinge point. The other end of each pull rod 42 is fixedly connected to the closed end of the U-shaped wind bag 21. The hinge point of the linkage rod 41 and the pull rod 42 is located on the extension line of the central axis of symmetry of the corresponding U-shaped wind bag 21. The length of each pull rod 42 is equal and symmetrical about the central axis of symmetry of the U-shaped wind bag 21. The included angle between each pull rod 42 and the central axis of symmetry of the U-shaped wind bag is 60°.

[0033] When the multi-airbag phase-distribution airbag pump is running, the crankshaft 3 and the eccentric crank 31 rotate. The rotation of the eccentric crank 31 drives the linkage rod 41 to move. The linkage rod 41 further drives the U-shaped airbag 21 to move axially through the tie rod 42. Since one end of the tie rod 42 is fixedly connected to the U-shaped airbag 21 and the other end is hinged to the linkage rod 41, a stable triangular structure is formed. The tie rod 42 will not deform during operation. Moreover, multiple tie rods 42 can share the lateral force generated by the non-axial movement of the linkage rod 41, preventing the U-shaped airbag 21 from generating unnecessary radial movement and irregular deformation. The multiple eccentric cranks 31 are distributed at equal angles to ensure that the phase difference of the compression / tension action of each U-shaped airbag 21 is evenly distributed. The total output flow is the sum of the instantaneous flow of the airbag assembly 2, which greatly weakens or even eliminates the flow pulsation and achieves continuous and stable delivery.

[0034] Example 2

[0035] The multi-airbag phase distribution airbag pump includes a pump body 1, six airbag assemblies 2, a crankshaft 3, and a pump housing 5. The airbag assemblies 2 are connected to the pump body 1. The airbag assembly 2 includes a U-shaped airbag 21 and a fixed cylinder 22. The U-shaped airbag 21 is slidably connected to the fixed cylinder 22. An inlet valve 23 and an outlet valve 24 are provided inside the U-shaped airbag 21. The pump body 1 is provided with an inlet port 11 and an outlet port 12. Each inlet valve 23 is connected to the inlet port 11, and each outlet valve 24 is connected to the outlet port 24. The crankshaft 3 is mounted on the pump housing 5 via bearings (not shown) and rotates via a power input device (not shown). The crankshaft 3 is equipped with six eccentric cranks 31 corresponding to the U-shaped airbags 21. The included angle between adjacent eccentric cranks 31 is equal to 120°. When each eccentric crank 31 rotates, it drives the corresponding U-shaped airbag 21 to stretch or compress via a linkage device 4. The linkage device 4 includes a linkage rod 41 and three pull rods 42. One end of the linkage rod 41 is hinged to the eccentric crank 31, and the other end of the linkage rod 41 is hinged to one end of each pull rod 42 at the same hinge point. The other end of each pull rod 42 is fixedly connected to the closed end of the U-shaped airbag 21. The hinge point of the linkage rod 41 and the pull rod 42 is located on the extension line of the central axis of symmetry of the corresponding U-shaped airbag 21. The length of each pull rod 42 is equal and symmetrical about the central axis of symmetry of the U-shaped airbag 21. The included angle between each pull rod 42 and the central axis of symmetry of the U-shaped airbag is 30°.

[0036] The three tie rods 42 form a triangular pyramid structure, which is more conducive to the structural stability of the tie rods 42 and the distribution of lateral force, further ensuring that the U-shaped wind bag 21 will not shift.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-airbag phase-distribution airbag pump, characterized in that, The device includes a pump body (1), at least three airbag assemblies (2) and a crankshaft (3). The airbag assemblies (2) are connected to the pump body (1). Each airbag assembly (2) includes a U-shaped airbag (21). The crankshaft (3) is provided with an eccentric crank (31) in a number corresponding to the U-shaped airbag (21). The included angle between adjacent eccentric cranks (31) is equal. When each eccentric crank (31) rotates, it drives the corresponding U-shaped airbag (21) to stretch or compress through a linkage device (4). The linkage device (4) includes a linkage rod (41) and multiple pull rods (42). One end of the linkage rod (41) is hinged to the eccentric crank (31). The other end of the linkage rod (41) is hinged to one end of each pull rod (42) at the same hinge point. The other end of each pull rod (42) is fixedly connected to the closed end of the U-shaped airbag (21).

2. The multi-airbag phase distribution airbag pump as described in claim 1, characterized in that, The sum of the included angles of the eccentric bend (31) is n*360°, where n is a positive integer.

3. The multi-airbag phase distribution airbag pump as described in claim 1, characterized in that, The included angle between the eccentric bends (31) is 90° to 180°.

4. The multi-airbag phase distribution airbag pump as described in claim 1, characterized in that, The number of the wind bag components (2) is odd.

5. The multiple-bellow phase distribution bellow pump of claim 1, wherein, The hinge point of the linkage rod (41) and the pull rod (42) is located on the extension line of the central axis of symmetry of the corresponding U-shaped air bag (21). The length of each pull rod (42) is equal and symmetrical about the central axis of symmetry of the U-shaped air bag (21).

6. The multiple-bellow phase distribution bellow pump of claim 5, wherein, The angle between each of the pull rods (42) and the central axis of symmetry of the U-shaped air bag (21) is 30° to 60°.

7. The multi-airbag phase distribution airbag pump as described in claim 1, characterized in that, The airbag assembly (2) also includes a fixing cylinder (22), and the U-shaped airbag (21) is slidably connected to the fixing cylinder (22).

8. The multiple-bellow phase distribution bellow pump of claim 1, wherein, The pump body (1) is provided with an inlet (11) and an outlet (12). Each air bag is provided with an inlet valve (23) and an outlet valve (24). Each inlet valve (23) is connected to the inlet (11), and each outlet valve (24) is connected to the outlet (12).

9. The multi-airbag phase distribution airbag pump as described in claim 1, characterized in that, It also includes a pump housing (5), on which the crankshaft (3) is mounted via bearings.

10. The multi-airbag phase distribution airbag pump as described in claim 1, characterized in that, The crankshaft (3) is rotated by a power input device.

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