Silencing air bag pump

Abstract

The utility model discloses a silencing air bag pump, and belongs to the technical field of pump body equipment. Comprising a pump head; the pump body comprises a liquid phase working chamber and a gas phase working chamber; the interior of the air bag is hollow to form a gas-phase working chamber; a gas inlet and a gas outlet are formed in the end of the gas phase working cavity, a silencing barrel is arranged at the end, connected with the gas outlet, of the second gas pipe connector and comprises a flow guide part and a sound absorption part which are connected in sequence, a plurality of flow guide grooves are formed in the inner surface of the flow guide part and distributed in the circumferential direction of the flow guide part, and the sound absorption part is connected with the flow guide part. Sound absorption holes are formed in at least part of the inner surface of the sound absorption part. According to the scheme, through the structural design of the air outlet, high-frequency noise generated when the gas phase working cavity is compressed is reduced, meanwhile, the air bag pump is matched with other structures, high-decibel and high-frequency noise of the air bag pump is well controlled, noise pollution is reduced, and the sound environment of workshop production is improved.

Description

Technical Field

[0001] This application relates to a silencer pump, belonging to the technical field of pump body equipment. Background Technology

[0002] The airbag pump is a positive displacement infusion pump. Due to its advantages such as high cleanliness, corrosion resistance, long service life, and convenient maintenance, it is particularly suitable for fluid delivery systems in industries such as chip semiconductors, photovoltaic solar cells, light-emitting diodes, liquid crystal displays, and electronics.

[0003] However, the noise and vibration of airbag pumps are extremely high, causing significant noise pollution in the semiconductor manufacturing environment and failing to meet occupational health standards in industrial production workshops. The noise from airbag pumps originates from multiple sources, including the whistling sound generated by rapid gas flow, friction noise from the expansion and contraction of the pump, and noise from the overall vibration of the pump. High-frequency and high-decibel noise can have adverse effects on hearing and psychological well-being, and long-term exposure can cause permanent health damage. Therefore, the noise control of airbag pumps needs to be addressed from multiple perspectives. Utility Model Content

[0004] To address the aforementioned issues, this application proposes a silencer airbag pump that reduces the whistling sound generated when air passes rapidly through the compressed working chamber by optimizing the structure at the air outlet of the airbag pump, thereby achieving noise reduction for the airbag pump.

[0005] According to one aspect of this application, a silencer pump is provided, comprising:

[0006] A pump head, comprising an inlet channel and an outlet channel, wherein a check valve is provided inside the pump head and is connected to the inlet channel and the outlet channel;

[0007] The pump body includes two compression chambers, which are located on both sides of the pump head and include a liquid phase working chamber and a gas phase working chamber.

[0008] An air bag is disposed inside the compression chamber. One end of the air bag is connected to the end of the compression chamber away from the pump head, and the other end is closed. The interior is hollow to form a gas phase working chamber.

[0009] The gas phase working chamber is provided with an air inlet and an air outlet at its end, and the air inlet and air outlet are respectively connected to the first air pipe connector and the second air pipe connector;

[0010] The second air pipe connector is provided with a silencer at one end connected to the air outlet. The silencer includes a flow guide and a sound absorber connected in sequence. The inner surface of the flow guide is provided with a plurality of flow guide grooves. The flow guide grooves are distributed along the circumference of the flow guide and extend in the direction of airflow. The sound absorber is provided with sound absorber holes on at least part of its inner surface.

[0011] Specifically, it also includes an air valve, which is located outside the pump body. The first air pipe connector and the second air pipe connector are both connected to the air valve through pipes. The air valve controls the entry and exit of gas in the pump body and provides operating power for the airbag pump.

[0012] Optionally, the flow guide is located at one end of the silencer near the gas phase working chamber, and the radius of the flow guide gradually increases from one end near the gas phase working chamber to the other end.

[0013] Optionally, the total projected area of ​​the flow guiding groove is not less than 1 / 4 of the projected area of ​​the inner surface of the flow guiding part.

[0014] Optionally, the sound-absorbing part includes an inner layer, a middle layer, and an outer layer, and the sound-absorbing holes are disposed in the inner layer.

[0015] Optionally, the middle layer of the sound-absorbing part is 1 to 3 layers of sound-absorbing material, which is selected from one or more of sound-absorbing foam, sound-absorbing cotton, or sound-absorbing glass wool.

[0016] Optionally, the outer layer of the sound-absorbing part is a smooth, hard material, and a plurality of elastic strips are embedded on the surface of the outer layer away from the middle layer.

[0017] Optionally, the elastic strip is distributed along the axial direction of the sound-absorbing part, and the surface of the elastic strip is 0.3 to 1 mm higher than the surface of the outer layer.

[0018] Optionally, the material of the elastic strip is selected from one of EVA, PU, ​​TPU and rubber.

[0019] Optionally, the inlet channel and the outlet channel are respectively connected to the inlet pipe and the outlet pipe, a flow stabilizing pipe section is provided between the inlet pipe and the inlet channel, the flow stabilizing pipe section is detachably connected to the pump head, and an elastic interlayer is provided between the flow stabilizing pipe section and the water inlet pipe.

[0020] Optionally, it also includes a base, which includes a plurality of support columns, support seats and a bottom plate arranged from top to bottom. The support columns are used to support the pump body. The support columns and support seats are both made of an alloy covered with a polymer material. An elastic interlayer is provided between the support seats and the bottom plate.

[0021] Specifically, the material of the elastic interlayer can be one of EVA, PU, ​​TPU or rubber.

[0022] The beneficial effects that this application may produce include, but are not limited to:

[0023] 1. The silencer pump provided in this application, by setting a silencer, effectively reduces the high-frequency noise generated by the extrusion port of the airbag pump when the airbag pump expands and is discharged in the gas phase working chamber by changing the local flow rate of the gas and weakening and absorbing the high-frequency noise, thereby improving the sound environment of the production workshop where the airbag pump is located.

[0024] 2. The silencer pump provided in this application reduces the noise generation pathways of the pump by stabilizing the flow and increasing the pump's own stability, and by using elastic materials to absorb vibrations, thus fundamentally solving some of the problems related to high-decibel noise generated by the pump. At the same time, when used in conjunction with a silencer, it can effectively reduce both high-decibel and high-frequency noise, improving the production environment. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 This is a schematic cross-sectional view of the main body of the airbag pump involved in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the airbag pump involved in the embodiments of this application;

[0028] Figure 3 This is a cross-sectional schematic diagram of the silencer cylinder involved in the embodiments of this application;

[0029] Figure 4 This is a schematic diagram of the overall silencer cylinder involved in the embodiments of this application.

[0030] List of components and reference numerals:

[0031] 1. Pump head; 2. Liquid inlet channel; 3. Liquid outlet channel; 4. Pump body; 5. Compression chamber; 6. Liquid phase working chamber; 7. Gas phase working chamber; 8. Air bag; 9. Air inlet; 10. Air outlet; 11. First air pipe connector; 12. Second air pipe connector; 13. Silencer; 14. Flow guide section; 15. Sound absorption section; 16. Flow guide groove; 17. Inner layer; 18. Sound absorption hole; 19. Middle layer; 20. Outer layer; 21. Elastic strip; 22. Liquid inlet pipe; 23. Liquid outlet pipe; 24. Flow stabilizing pipe section; 25. Support column; 26. Support base; 27. Base plate; 28. Air valve. Detailed Implementation

[0032] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] refer to Figure 1-4 This application discloses a silent airbag pump, comprising:

[0040] Pump head 1 includes an inlet channel 2 and an outlet channel 3. A check valve is provided inside the pump head 1, and the check valve is connected to the inlet channel 2 and the outlet channel 3.

[0041] Pump body 4 includes two compression chambers 5, which are located on both sides of pump head 1, including liquid phase working chamber 6 and gas phase working chamber 7.

[0042] The air bag 8 is set inside the compression chamber 5. One end of the air bag 8 is connected to the end of the compression chamber 5 away from the pump head 1, and the other end is closed. The interior is hollow to form a gas phase working chamber 7.

[0043] The gas phase working chamber 7 is provided with an air inlet 9 and an air outlet 10 at its end. The air inlet 9 and the air outlet 10 are respectively connected to the first air pipe connector 11 and the second air pipe connector 12.

[0044] The second air pipe connector 12 is connected to the air outlet 10 at one end and is provided with a silencer 13. The silencer 13 includes a flow guide 14 and a sound absorber 15 connected in sequence. The inner surface of the flow guide 14 is provided with a plurality of flow guide grooves 16. The flow guide grooves 16 are distributed along the circumference of the flow guide 14 and extend in the direction of airflow. The sound absorber 15 is provided with sound absorber holes 18 on at least part of its inner surface.

[0045] As a specific implementation, the cross-section of the flow guide groove 16 can be V-shaped or semi-elliptical, which can reduce the flow loss of airflow, while providing good airflow guidance and improving the discharge rate of airflow in the flow guide 14.

[0046] Specifically, it also includes an air valve 28, which is located outside the pump body 4. The first air pipe connector 11 and the second air pipe connector 12 are both connected to the air valve 28 through pipes. The air valve 28 controls the entry and exit of gas in the pump body 4 and provides operating power for the airbag pump.

[0047] In one embodiment, the flow guide 14 is provided at one end of the silencer 13 near the gas phase working chamber 7, and the radius of the flow guide 14 gradually increases from one end near the gas phase working chamber 7 to the other end.

[0048] The flow guide section 14 adopts a gradually expanding flow channel design. The gradually increasing radius significantly reduces the airflow speed, avoiding the narrow tube effect at the exhaust port when the gas in the gas phase working chamber 7 is discharged, which can greatly reduce the noise generated therefrom.

[0049] In one embodiment, the total projected area of ​​the flow guide groove 16 is not less than 1 / 4 of the projected area of ​​the inner surface of the flow guide portion 14.

[0050] The large projected area of ​​the flow guide groove 16 inside the flow guide section 14 not only effectively guides the airflow, but also effectively expands the diameter of the flow guide section 14, forming a stepped diameter change, further reducing the airflow velocity and turbulence loss. This reduces the noise of the airbag pump while preventing gas stagnation, allowing the airflow to be discharged as quickly as possible along the axial direction of the flow guide section 14 without affecting the efficiency of the airbag pump.

[0051] In one embodiment, the sound-absorbing part 15 includes an inner layer 17, a middle layer 19 and an outer layer 20, and the sound-absorbing hole 18 is disposed in the inner layer 17.

[0052] In one specific implementation, the inner layer 17 and the intermediate layer 19 are bonded together, and the bonding is a discontinuous application of adhesive.

[0053] The inner layer 17 and the middle layer 19 are bonded together by discontinuous adhesive application, forming a certain gap between the two layers. The sound-absorbing hole 18 and the gap between the two layers together constitute a Helmholtz resonant cavity, which effectively absorbs and reduces airflow noise.

[0054] In one embodiment, the middle layer 19 of the sound-absorbing part 15 is one to three layers of sound-absorbing material, which is selected from one or more of sound-absorbing foam, sound-absorbing cotton or sound-absorbing glass wool.

[0055] The sound-absorbing material can further reduce and absorb noise passing through the sound-absorbing holes 18, thereby improving the noise reduction rate. Sound-absorbing cotton is preferred, as it not only has good sound insulation but also strong chemical stability, is fire-resistant and moisture-resistant, and can be used as the outermost layer 20 sound insulation material.

[0056] In one embodiment, the outer layer 20 of the sound-absorbing part 15 is a smooth, hard material, and a plurality of elastic strips 21 are embedded on the surface of the outer layer 20 away from the middle layer 19.

[0057] In one specific implementation, the outer layer 20 of the sound-absorbing part 15 and the flow guide part 14 are integrally formed to constitute the outer shell of the muffler 13. This structure can ensure the integrity and sealing of the muffler 13.

[0058] In one embodiment, the elastic strip 21 is distributed along the axial direction of the sound-absorbing part 15, and the surface of the elastic strip 21 is 0.3 to 1 mm higher than the surface of the outer layer 20.

[0059] As one implementation, the material of the elastic strip 21 is selected from EVA, PU, ​​TPU and rubber.

[0060] The outer layer 20 of the sound-absorbing part 15 is a smooth, hard material, such as PPS, PP, or PTFE. When the sound-absorbing material in the middle layer of the sound-absorbing part 15 ages and its noise reduction ability decreases, the entire muffler 13 can be replaced. The elastic strips 21 distributed around the sound-absorbing part 15 can seal the muffler 13 and the airbag pump body 4 when they are in contact, preventing gas leakage and affecting the airbag pump's delivery capacity.

[0061] In one embodiment, the liquid inlet channel 2 and the liquid outlet channel 3 are respectively connected to the liquid inlet pipe and the liquid outlet pipe 23. A flow stabilizing pipe section 24 is provided between the liquid inlet pipe and the liquid inlet channel 2. The flow stabilizing pipe section 24 is detachably connected to the pump head 1. An elastic interlayer is provided between the flow stabilizing pipe section 24 and the water inlet pipe.

[0062] Through the aforementioned components, the flow stabilizing pipe section 24 stabilizes the inlet pipe, preventing further vibration caused by the unstable liquid flow inside the pipe, which would exacerbate the noise generated by the unstable fluid in the air bag pump. This reduces the noise generated by the liquid flow at the inlet. At the same time, the stable liquid flow also reduces the occurrence of cavitation and liquid erosion, reduces fatigue damage to the air bag 8, and extends the service life of the air bag 8.

[0063] In one embodiment, the system also includes a base, which includes a plurality of support columns 25, support seats 26 and a base plate 27 arranged from top to bottom. The support columns 25 are used to support the pump body 4. The support columns 25 and the support seats 26 are both made of an alloy covered with a polymer material. An elastic interlayer is provided between the support seats 26 and the base plate 27.

[0064] Specifically, the material of the elastic interlayer includes one of EVA, PU, ​​TPU and rubber.

[0065] The polymer material covers the alloy body, ensuring that the body will not be corroded due to accidental corrosion of the pump body 4. This increases the overall weight of the base, lowers the center of gravity of the airbag pump, thereby reducing the pump's violent vibration and thus reducing the noise caused by the vibration.

[0066] The working principle of the airbag pump is as follows: the air valve 28 controls the entry and exit of gas in the airbag pump. At one end of the airbag pump, the gas phase working chamber 7 is expanded by the intake of gas, and the volume of the liquid phase working chamber 6 decreases. The liquid outlet check valve at this end opens and the liquid inlet check valve closes, and the liquid is pumped out through the liquid outlet channel 3. At the other end, the gas phase working chamber 7 is contracted by the exhaust of gas, and the liquid phase working chamber 6 is expanded. The liquid inlet check valve at this end opens and the liquid outlet check valve closes, and the liquid is pumped in, thus realizing liquid delivery.

[0067] In the above process, the silencer 13 regulates and absorbs the flow rate and noise of the gas phase working chamber 7, reducing the noise generated by the gas whistling; at the same time, it works in conjunction with the flow stabilizing pipe section 24 and the weighted support 26 to reduce the noise generated by the turbulence and vibration of the air bag pump, and greatly improve the working environment of the air bag pump workshop.

[0068] 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.

[0069] The above are merely embodiments of this application and are 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 silencing air-bag pump, characterized in that include: A pump head, comprising an inlet channel and an outlet channel, wherein a check valve is provided inside the pump head and is connected to the inlet channel and the outlet channel; The pump body includes two compression chambers, which are located on both sides of the pump head and include a liquid phase working chamber and a gas phase working chamber. An air bag is disposed inside the compression chamber. One end of the air bag is connected to the end of the compression chamber away from the pump head, and the other end is closed. The interior is hollow to form a gas phase working chamber. The gas phase working chamber is provided with an air inlet and an air outlet at its end, and the air inlet and air outlet are respectively connected to the first air pipe connector and the second air pipe connector; The second air pipe connector is provided with a silencer at one end connected to the air outlet. The silencer includes a flow guide and a sound absorber connected in sequence. The inner surface of the flow guide is provided with a plurality of flow guide grooves. The flow guide grooves are distributed circumferentially along the flow guide and extend in the direction of airflow. The sound absorber is provided with sound absorber holes on at least part of its inner surface.

2. The silencing bellows pump of claim 1, wherein, The flow guide is located at one end of the silencer cylinder near the gas phase working chamber, and the radius of the flow guide gradually increases from one end near the gas phase working chamber to the other end.

3. The silencing bellows pump of claim 2, wherein, The total projected area of ​​the flow guiding groove is not less than 1 / 4 of the projected area of ​​the inner surface of the flow guiding part.

4. The silencing bellows pump of claim 1, wherein, The sound-absorbing part includes an inner layer, a middle layer and an outer layer, and the sound-absorbing holes are disposed in the inner layer.

5. The silencing bellows pump of claim 4, wherein, The middle layer of the sound-absorbing part consists of 1 to 3 layers of sound-absorbing material, which is selected from one or more of sound-absorbing foam, sound-absorbing cotton, or sound-absorbing glass wool.

6. The sound attenuating bellows pump of claim 4, wherein, The outer layer of the sound-absorbing part is a smooth, hard material, and several elastic strips are embedded on the surface of the outer layer away from the middle layer.

7. The sound attenuating bellows pump of claim 6, wherein, The elastic strips are distributed along the axial direction of the sound-absorbing part, and the surface of the elastic strips is 0.3 to 1 mm higher than the surface of the outer layer.

8. The sound attenuating bellows pump of claim 7, wherein, The elastic strip is made of one of the following materials: EVA, PU, ​​TPU, and rubber.

9. The sound attenuating bellows pump of claim 1, wherein, The inlet channel and outlet channel are respectively connected to the inlet pipe and the outlet pipe. A flow stabilizing pipe section is provided between the inlet pipe and the inlet channel. The flow stabilizing pipe section is detachably connected to the pump head. An elastic interlayer is provided between the flow stabilizing pipe section and the water inlet pipe.

10. The silencing bellows pump of claim 9, wherein, It also includes a base, which includes several support columns, support seats and a bottom plate arranged from top to bottom. The support columns are used to support the pump body. The support columns and support seats are both made of an alloy covered with a polymer material. An elastic interlayer is provided between the support seats and the bottom plate.

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