Air bag pump

Abstract

The utility model discloses an air bag pump, and belongs to the technical field of pump body equipment. The air bag pump comprises a pump head, at least four open holes are formed in the pump head, and a first connecting rod is fixed in each open hole; the pump body comprises two gas phase working chambers, and each gas phase working chamber is provided with a gas inlet and a gas outlet; the air bag is arranged in the gas phase working chamber, the second end of the air bag is closed, the interior of the air bag is hollow to form a liquid phase working chamber, a first flange is arranged on the periphery of the first end of the air bag, first through holes corresponding to the open holes one to one are formed in the first flange, the first connecting rod penetrates through the first through holes, and the second connecting rod penetrates through the second through holes. And the air bag is fixedly connected with the pump head. Through the structural design in the air bag pump, the air bag and the pump head can be well and fixedly connected without screw joint and welding, and the sealing performance and the running stability of the air bag pump are guaranteed.

Description

Technical Field

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

[0002] Fluoropolymer-based airbag pumps have been widely used for conveying cleaning liquids for semiconductors. Reciprocating airbag pumps generally include two target fluid chambers, each containing an expandable or contractible airbag; the expansion or contraction of the airbag enables the intake or exhaust of the target fluid in the target fluid chamber.

[0003] Existing patent JP3519364B2 discloses a sealed airbag pump; refer to its patent appendix. Figure 2 As described in the instruction manual, the existing airbag opening and pump head are connected and fixed by a snap-fit ​​between a protrusion and a groove (11a and 14c), with the internal thread 14d of groove 14c and the external thread 11b of protrusion 11a screwed together. This connection method, where the airbag opening is screwed to the pump head via internal and external threads, may affect the liquid seal of the protrusion and groove. Due to the high temperature (150-180°C) of the liquid in the fluid chamber inside the airbag, the internal and external threads may soften to some extent, reducing the strength of the screwed connection between the airbag opening and the pump head. The reciprocating expansion and contraction of the airbag could cause the liquid seal of the protrusion and groove to fail.

[0004] Patent CN221547254U fixes the air bag and pump head by welding them together. However, due to the unevenness and weld seam problems in the welding fixation, the weld will crack due to the vibration and swaying of the air bag during long-term use, which affects production efficiency and safety. Utility Model Content

[0005] To solve the above problems, a wind bag pump is provided. This method can connect the wind bag and the pump head without welding the wind bag or screwing the wind bag to the pump head through threads on the wind bag.

[0006] According to one aspect of this application, a windshield pump is provided, comprising:

[0007] A pump head, the pump head including an inlet channel and an outlet channel, the pump head having at least four openings, each of which is fixed with a first connecting rod;

[0008] The pump body includes two gas phase working chambers, each of which has an air inlet and an air outlet.

[0009] The air bag is disposed in the gas phase working chamber. The second end of the air bag is closed and the interior is hollow to form a liquid phase working chamber. The outer periphery of the first end of the air bag is provided with a first flange. The first flange is provided with a first through hole corresponding to the opening. The first connecting rod passes through the first through hole to fix the air bag and the pump head.

[0010] Specifically, the first connecting rod and the pump head can be snap-fitted, sleeved, or integrally formed.

[0011] Specifically, an O-ring or gasket for sealing can be provided between the air bag and the pump head, or sealing can be achieved through mutually cooperating bosses and grooves.

[0012] Optionally, the connection surface between the pump head and the air bag is provided with a first groove, and the first end of the air bag is also provided with an annular first protrusion, which abuts against the first groove to seal the liquid phase working chamber.

[0013] Optionally, the pump head is further provided with a positioning post, which is fixedly connected to the pump head. The first flange is provided with a positioning hole that mates with the positioning post, and the positioning post is engaged with the positioning hole.

[0014] Optionally, the second end of the air bag is provided with a second flange on its outer periphery, and a second through hole is provided on the second flange. The first connecting rod passes through the first through hole and the second through hole and extends to both ends of the pump body to connect the pump body and the air bag.

[0015] Optionally, a spring is provided between the air bag and the pump body.

[0016] Optionally, a first connecting plate and a second connecting plate are respectively provided at both ends of the pump body, and the first connecting plate and the second connecting plate are connected by a second connecting rod.

[0017] Optionally, the pump body and the pump head are connected by a second connecting rod;

[0018] There are at least four second connecting rods, which are evenly arranged along the circumference of the pump body.

[0019] Optionally, a gasket is provided between the pump body and the pump head. The gasket has an annular structure and a thickness of 0.5 mm to 2 mm.

[0020] Optionally, a check valve is provided in the inlet channel and the outlet channel, and the valve seat of the check valve is tightly fitted with the inner wall of the inlet channel and the outlet channel.

[0021] Optionally, the check valve is a ball check valve.

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

[0023] 1. The wind bag pump of this application fixes the pump head and the wind bag by setting a first connecting rod that is fixedly connected to the pump head, eliminating the need for threaded or welded connections, thus avoiding the risk of thread softening or weld cracking. Furthermore, fixing via the connecting rod facilitates maintenance of the wind bag pump and improves production efficiency.

[0024] 2. The wind bag pump of this application, through the matching grooves and bosses on the pump head and the wind bag, combined with the positioning post and the second connecting rod, limits and secures the wind bag, pump head and pump body, thereby improving the overall sealing performance of the wind bag pump and making production safer and more efficient.

[0025] 3. The wind bag pump of this application, by setting a spring, provides an appropriate reaction force according to the degree of deformation of the wind bag, ensuring that the wind bag quickly returns to its original shape when the air pressure changes, thereby improving the working efficiency and response speed of the pump, and at the same time reducing the swing and noise of the wind bag in the vertical direction to a certain extent; the second flange passing through the first connecting rod allows the wind bag to move along the first connecting rod during compression and expansion. The two together ensure the stability of the wind bag operation, reduce the vibration amplitude and noise during the expansion and compression of the wind bag, and improve the smoothness of the wind bag pump operation and its durability. Attached Figure Description

[0026] 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:

[0027] Figure 1 This is a schematic diagram of the overall airbag pump involved in the embodiments of this application.

[0028] Figure 2 This is a schematic cross-sectional view of the airbag pump involved in the embodiments of this application.

[0029] Figure 3 This is a partial schematic diagram of the pump head of the airbag pump involved in the embodiments of this application.

[0030] Figure 4 This is a front view of the airbag of the airbag pump involved in the embodiment of this application.

[0031] List of components and reference numerals:

[0032] 1. Pump head; 2. Liquid inlet channel; 3. Liquid outlet channel; 4. Opening; 5. First connecting rod; 6. Pump body; 7. Gas phase working chamber; 8. Air inlet; 9. Air outlet; 10. Air bag; 11. Liquid phase working chamber; 12. First flange; 13. First through hole; 14. First groove; 15. First boss; 16. Positioning post; 17. Second flange; 18. Second through hole; 19. Second connecting rod; 20. Spring; 21. Check valve. Detailed Implementation

[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] In the attached diagram, dashed lines are used to represent invisible outlines or invisible edges.

[0040] refer to Figures 1-4 This application discloses an airbag pump, comprising:

[0041] The pump head 1 includes an inlet channel 2 and an outlet channel 3. The pump head 1 is provided with at least four openings 4, and a first connecting rod 5 is fixed in the openings 4.

[0042] Pump body 6, which includes two gas phase working chambers 7, each of which is provided with an air inlet 8 and an air outlet 9;

[0043] The air bag 10 is installed in the gas phase working chamber 7. The second end of the air bag 10 is closed and the interior is hollow to form a liquid phase working chamber 11. The outer periphery of the first end of the air bag 10 is provided with a first flange 12. The first flange 12 is provided with a first through hole 13 corresponding to the opening 4. The first connecting rod 5 passes through the first through hole 13 to fix and connect the air bag 10 and the pump head 1.

[0044] The first connecting rod 5 passes through the first through hole 13 on the first flange 12 of the air bag 10, which can fix the air bag 10 and the pump head 1 by pressing. With this setting, since the first connecting rod 5 is fixed in the pump head 1, it can avoid the first connecting rod 5 from loosening due to the vibration generated by the operation of the air bag pump, thereby preventing the seal from being damaged. This improves the sealing of the air bag pump during operation, increases the conveying capacity of the air bag pump, and extends its service life.

[0045] In one specific implementation, the gas phase working chamber 7 obtains driving force through an external gas supply device connected to the air inlet 8 and the air outlet 9.

[0046] In one embodiment, the connection surface between the pump head 1 and the air bag 10 is provided with a first groove 14, and the first end of the air bag 10 is also provided with an annular first boss 15. The first boss 15 abuts against the first groove 14 to seal the liquid phase working chamber 11.

[0047] The first protrusion 15 abuts against the first groove 14, which not only limits the position of the air bag 10 and reduces the positional displacement caused by the expansion and contraction vibration of the air bag 10 during long-term operation, but also improves the sealing of the liquid phase working chamber 11 through tight contact.

[0048] In one embodiment, the pump head 1 is also provided with a positioning post 1616, which is fixedly connected to the pump head 1. The first flange 12 is provided with a positioning hole that mates with the positioning post 16, and the positioning post 16 is engaged with the positioning hole.

[0049] The positioning column 16 is fixedly connected to the pump head 1, so that the positioning column 16 will not loosen due to vibration when the pump is working. The design of the positioning column 16 not only improves the reliable connection between the pump head 1 and the air bag 10, but also increases the friction between the positioning column 16 and the air bag 10 by enhancing the surface roughness, which significantly improves the connection stability between the air bag 10 and the pump head 1, making the movement of the air bag 10 in the gas phase working chamber 7 more stable, thereby improving the pump's discharge efficiency and reducing the phenomenon of liquid retention in the pump.

[0050] In one embodiment, the second end of the air bag 10 is provided with a second flange 17 on its outer periphery, and a second through hole 18 is provided on the second flange 17. The first connecting rod 5 passes through the first through hole 13 and the second through hole 18 and extends to both ends of the pump body 6 to connect the pump body 6 and the air bag 10.

[0051] The first connecting rod 5 passes through the second through hole 18 on the second flange 17, allowing the second end of the air bag 10 to slide along the first connecting rod 5. This limits the direction of movement of the air bag 10 during its contraction and expansion, reduces the movement of the air bag 10 perpendicular to its extension and contraction direction, and improves the stability of the air bag pump. The first connecting rod 5 extends to both ends of the pump body 6 and is fixed by fasteners. This connects the pump body 6 and the air bag 10 while also pressing the connection between the pump head 1, the air bag 10, and the pump body 6, making the overall connection stability of the air bag pump higher. The first connecting rod 5 and both ends of the pump body 6 can be sealed by O-rings.

[0052] In one embodiment, a spring 20 is provided between the air bag 10 and the pump body 6.

[0053] During operation, when the gas pressure in the gas phase working chamber 7 changes, on the one hand, the spring 20 can provide an appropriate reaction force according to the degree of deformation of the air bag 10, ensuring that the air bag 10 quickly returns to its original shape when the gas pressure changes, thereby improving the pump's working efficiency and response speed; on the other hand, the reaction force provided by the spring 20 to the air bag 10 can prevent the air bag 10 from overstretching, thereby preventing the air bag 10 from having a shortened lifespan due to overstretching; in addition, the presence of the spring 20 can also effectively reduce the vibration and noise of the air bag 10, and improve the overall stability of the air bag pump operation.

[0054] In one embodiment, a first connecting plate and a second connecting plate are respectively provided at both ends of the pump body 6, and the first connecting plate and the second connecting plate are connected by a second connecting rod 19.

[0055] The second connecting rod 19 further tightens the two opposite ends of the pump body 6, improving the reliability of the airbag pump installation and the safety of its operation.

[0056] In one embodiment, the pump body 6 and the pump head 1 are connected by a second connecting rod 19;

[0057] There are at least four second connecting rods 19, which are evenly arranged around the circumference of the pump body 6.

[0058] The evenly distributed second connecting rods 19 make the force on both ends of the pump body 6 more uniform along the axial direction, thus improving the durability of the airbag pump.

[0059] In one embodiment, a gasket is provided between the pump body 6 and the pump head 1. The gasket has an annular structure and a thickness of 0.5 mm to 2 mm.

[0060] The gasket can accommodate the tiny gap between the pump head 1 and the pump body 6 and effectively prevent liquid leakage.

[0061] In one embodiment, a check valve 21 is provided in the liquid inlet channel 2 and the liquid outlet channel 3, and the valve seat of the check valve 21 is tightly fitted with the inner wall of the liquid inlet channel 2 and the liquid outlet channel 3.

[0062] It can ensure an effective seal when the fluid flows in reverse, preventing fluid backflow.

[0063] In one implementation, the check valve 21 is a ball check valve 21.

[0064] The ball check valve 21 can move under the action of fluid pressure, thereby realizing unidirectional flow control of the fluid.

[0065] The working principle of the airbag pump is as follows: Compressed gas is introduced into the gas phase working chamber 7 at one end, increasing the pressure in the gas phase working chamber 7. The airbag 10 in the chamber is compressed under force, and the check valve 21 of the liquid outlet channel 3 in the liquid phase working chamber 11 on the same side opens while the check valve 21 of the liquid inlet channel 2 closes, allowing the liquid to be pumped to the outlet. Gas is discharged from the gas phase working chamber 7 at the other end, decreasing the pressure in the gas phase working chamber. The airbag 10 in the chamber expands, and the check valve 21 of the liquid outlet channel 3 in the liquid phase working chamber 11 on the same side closes while the check valve 21 of the liquid inlet channel 2 opens, allowing the liquid to be pumped in from the inlet. The pressure in the gas phase working chambers 7 on both sides alternately increases and decreases, and the corresponding airbags 10 alternately compress and expand, thereby realizing the pumping of liquid.

[0066] During the aforementioned operation, the first connecting rod 5 securely connects the pump head 1 and the air bag 10 by pressing, reducing the risk of the air bag 10 falling off the pump head 1. This structure also facilitates maintenance and improves work efficiency. The second flange 17 allows the air bag 10 to move along the first connecting rod 5 during compression and expansion, ensuring the stability of the air bag 10 during operation. The spring 20 is compressed when the air bag 10 expands, providing a certain reaction force to the second end of the air bag 10 and improving the operating efficiency of the air bag pump.

[0067] The above are merely embodiments of this application, and the scope of protection of this application is not limited to these specific embodiments, but is determined by the claims 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 technical concept and principles of this application should be included within the scope of protection of this application.

Claims

1. A wind-bag pump, characterized in that, include: A pump head, the pump head including an inlet channel and an outlet channel, the pump head having at least four openings, each of which is fixed with a first connecting rod; The pump body includes two gas phase working chambers, each of which has an air inlet and an air outlet. The air bag is disposed in the gas phase working chamber. The second end of the air bag is closed and the interior is hollow to form a liquid phase working chamber. The outer periphery of the first end of the air bag is provided with a first flange. The first flange is provided with a first through hole corresponding to the opening. The first connecting rod passes through the first through hole to fix the air bag and the pump head.

2. The airbag pump according to claim 1, characterized in that, The connection surface between the pump head and the air bag is provided with a first groove, and the first end of the air bag is also provided with an annular first protrusion. The first protrusion abuts against the first groove to seal the liquid phase working chamber.

3. The airbag pump according to claim 1, characterized in that, The pump head is also provided with a positioning post, which is fixedly connected to the pump head. The first flange is provided with a positioning hole that cooperates with the positioning post, and the positioning post is engaged with the positioning hole.

4. The airbag pump according to claim 2, characterized in that, The second end of the air bag is provided with a second flange on its outer periphery, and a second through hole is provided on the second flange. The first connecting rod passes through the first through hole and the second through hole and extends to both ends of the pump body to connect the pump body and the air bag.

5. The airbag pump according to claim 1, characterized in that, A spring is provided between the air bag and the pump body.

6. The airbag pump according to claim 1, characterized in that, The pump body is provided with a first connecting plate and a second connecting plate at both ends, and the first connecting plate and the second connecting plate are connected by a second connecting rod.

7. The airbag pump according to claim 6, characterized in that, The pump body and the pump head are connected by a second connecting rod; There are at least four second connecting rods, which are evenly arranged along the circumference of the pump body.

8. The airbag pump according to claim 1, characterized in that, A gasket is provided between the pump body and the pump head. The gasket has an annular structure and a thickness of 0.5 mm to 2 mm.

9. The airbag pump according to claim 1, characterized in that, The inlet and outlet channels are equipped with check valves, and the valve seat of the check valve is tightly fitted with the inner wall of the inlet and outlet channels.

10. The airbag pump according to claim 9, characterized in that, The check valve is a ball check valve.

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