A long-life pneumatic diaphragm pump with improved stability and reduced particulate contamination

Abstract

This application discloses a long-life pneumatic diaphragm pump with improved stability and reduced particulate contamination, belonging to the technical field of pump body equipment. Its check valve includes a valve seat and a valve core. The valve seat is fixedly connected to the pipe sidewall with a smooth connection. The valve seat surface is provided with arc-shaped protrusions. The valve core includes a valve core head, a valve core column, and a valve core tail. The diaphragm pump of this application reduces the instantaneous stress of the check valve during closure by increasing the contact area between the valve core and the valve seat, thus reducing particulate contamination that may occur during pump operation. Simultaneously, by adjusting the shape of the valve core head and valve core tail, it reduces the pulse damage caused by the liquid hammer effect.

Description

Technical Field

[0001] This application relates to a long-life pneumatic diaphragm pump with improved stability and reduced particulate contamination, belonging to the technical field of pump body equipment. Background Technology

[0002] A diaphragm pump is a pump that achieves fluid flow through the reciprocating motion of a diaphragm. Diaphragm pumps have excellent self-priming capabilities and can handle high-viscosity liquids. They can operate without fluid without damage and are widely used in chemical, pharmaceutical, semiconductor, food processing, wastewater treatment, mining, and many other industrial fields. The design and operation of diaphragm pumps make them versatile and reliable fluid handling devices, especially suitable for applications with special requirements for pump sealing and safety.

[0003] In today's semiconductor manufacturing, particulate contamination is a critical issue, and the purity requirements for fluid handling devices are higher than ever before.

[0004] Common diaphragm pump valve systems pose a very high risk of particulate contamination. The flexible diaphragm reciprocates, forming a temporary chamber. Check valves ensure alternating pumping between the two chambers by pumping in and out liquids. When the valve ball of the diaphragm pump check valve moves downward, it impacts the chamber, causing wear and tear on both components. Before completely stopping, the check valve will bounce back and forth. The check valve and housing have extremely high stress values ​​exceeding 50 bar. Repeated impacts within a certain period of time will lead to wear and particle splashing. At the same time, a significant liquid hammer effect is formed below the check valve. The periodic waves of the liquid hammer cause pulsation in the fluid transport. Utility Model Content

[0005] To address the aforementioned issues, this application proposes a long-life pneumatic diaphragm pump that improves stability and reduces particulate contamination. By increasing the contact area between the valve core and the valve seat, the instantaneous stress at check valve closure is reduced, thereby minimizing particulate contamination that may occur during pump operation. Simultaneously, by adjusting the shape of the valve core head and tail, the pulse hazards caused by the liquid hammer effect are reduced.

[0006] According to one aspect of this application, a long-life pneumatic diaphragm pump with improved stability and reduced particulate contamination is provided, comprising:

[0007] A base, wherein a plurality of columns are fixedly connected to the upper surface of the base, and a pump body is fixedly connected to the upper end of the columns;

[0008] A central column is provided in the middle of the pump body, and grooves are provided on both sides of the central column. The grooves are located at the middle position of the central column in the vertical direction, and the grooves and the diaphragm form a diaphragm chamber.

[0009] The pipes are arranged on both sides of the central column. The lower end of the pipes is provided with a fluid inlet, which is connected to the inlet pipe. The upper end of the pipes is provided with a fluid outlet, which is connected to the outlet pipe.

[0010] The inner wall of the pipeline is provided with several check valves. Each check valve includes a valve seat and a valve core. The valve seat is fixedly connected to the side wall of the pipeline and the connection is smooth. The surface of the valve seat is provided with arc-shaped protrusions. The valve core includes a valve core head, a valve core column and a valve core tail.

[0011] Optionally, the width of the pipe is d, the height of the arc-shaped protrusion is h1, and the relationship between the total height of the two arc-shaped protrusions and the width d of the pipe is as follows:

[0012] Optionally, the base width of the arc-shaped protrusion is l, and the relationship between the base width L and the protrusion height h1 of the arc-shaped protrusion is L≧4h1.

[0013] Optionally, the surface of the valve core column is formed with a recess, the shape of which corresponds to the arcuate protrusion.

[0014] Optionally, the valve core tail is umbrella-shaped.

[0015] Optionally, the valve core head is a flat, shovel-shaped part.

[0016] Optionally, the ratio of the length a to the width b of the valve core head is not greater than 3.

[0017] Optionally, at least two longitudinal reinforcing ribs are provided on the flat surfaces on both sides of the valve core head.

[0018] Optionally, the two ends of the reinforcing rib are pyramids or semi-cones.

[0019] Optionally, the maximum height of the reinforcing rib shall not exceed 3 mm.

[0020] The beneficial effects that this application may produce include, but are not limited to:

[0021] 1. This application discloses a high-lifespan pneumatic diaphragm pump that improves stability and reduces particulate contamination. By setting the shape of the valve seat and matching it with the overall shape of the valve core, the contact area between the valve core and the valve seat can be increased, reducing particulate contamination generated between the valve seat and the valve core. At the same time, by adjusting the shape of the valve core head and valve core tail, the pulse damage caused by the liquid hammer effect can be reduced.

[0022] 2. The present application provides a high-lifespan pneumatic diaphragm pump with improved stability and reduced particulate contamination. By defining the valve seat surface as an arc-shaped protrusion, the contact area between the valve seat and the valve core during collision is reduced, thereby reducing the instantaneous impact force and reducing particulate contamination caused by the operation of the diaphragm pump. At the same time, the valve core column surface is an arc shape that matches the valve seat, further increasing the collision contact area, thereby reducing the generation of particulate contamination during operation.

[0023] 3. The present application provides a long-life pneumatic diaphragm pump that improves stability and reduces particulate pollution. By setting the valve core tail to an umbrella shape, buoyancy is generated in the liquid flow, reducing the collision speed and intensity, and reducing the generation of particulate matter.

[0024] 4. The present application provides a high-lifespan pneumatic diaphragm pump that improves stability and reduces particulate contamination. This pump can break up the surges formed in the pipeline due to the liquid hammer effect, and at the same time, it can effectively guide the liquid flow with tapered reinforcing ribs to reduce the pulses formed by the opening and closing of the check valve during liquid transportation, thereby improving the stability of the transportation. 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 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 diagram of the diaphragm pump structure involved in an embodiment of this application;

[0027] Figure 2 This is a schematic cross-sectional view of the diaphragm pump involved in an embodiment of this application;

[0028] Figure 3 The embodiments of this application involve Figure 2 A magnified view of the diaphragm pump at point A in the middle;

[0029] Figure 4 This is a front view of the valve core of the diaphragm pump check valve involved in the embodiments of this application;

[0030] Figure 5 This is a side view of the valve core of the diaphragm pump check valve involved in the embodiments of this application;

[0031] List of components and reference numerals:

[0032] 1. Diaphragm pump; 2. Base; 3. Column; 4. Pump body; 5. Central shaft column; 6. Groove; 7. Diaphragm; 8. Pipeline; 9. Fluid inlet; 10. Fluid outlet; 11. Inlet pipe; 12. Outlet pipe; 13. Check valve; 14. Valve seat; 15. Valve core; 16. Valve core head; 17. Valve core column; 18. Valve core tail; 19. Reinforcing rib. 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, in the description of this application, "multiple" 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 1-5 This application discloses an embodiment of a long-life pneumatic diaphragm pump 7 that improves stability and reduces particulate contamination, comprising:

[0040] The base 2 has several columns 3 fixedly connected to its upper surface, and the pump body 4 is fixedly connected to the upper end of the columns 3.

[0041] The central shaft column 5 is located in the middle of the pump body 4. Grooves 6 are provided on both sides of the central shaft column 5. The grooves 6 are located in the middle of the central shaft column 5 in the vertical direction. The grooves 6 and the diaphragm 7 form the diaphragm 7 chamber.

[0042] Pipeline 8 is located on both sides of the central column 5. The lower end of pipeline 8 is provided with fluid inlet 9, which is connected to liquid inlet pipe 11. The upper end of pipeline 8 is provided with fluid outlet 10, which is connected to liquid outlet pipe 12.

[0043] The inner wall of the pipeline 8 is provided with several check valves 13. Each check valve 13 includes a valve seat 14 and a valve core 15. The valve seat 14 is fixedly connected to the side wall of the pipeline 8 and the connection is smooth. The surface of the valve seat 14 is provided with an arc-shaped protrusion. The valve core 15 includes a valve core head 16, a valve core column 17 and a valve core tail 18.

[0044] The valve seat 14 with its arc-shaped protrusion can increase the collision contact area between itself and the valve core 15, reduce the stress value of the check valve 13 at the moment of closing, and thus reduce the generation of collision particles.

[0045] In one implementation, the width of pipe 8 is d, the height of the arc-shaped protrusion is h1, and the relationship between the total height of the two arc-shaped protrusions and the width d of pipe 8 is as follows:

[0046] If the width difference between valve seat 14 and pipe 8 is too large, turbulence will easily be formed, affecting the conveying efficiency and aggravating the wear of pipe 8 and check valve 13.

[0047] In one implementation, the base width of the arc-shaped protrusion is L, and the relationship between the base width L and the protrusion height h1 of the arc-shaped protrusion is L≧4h1.

[0048] This design prevents excessively high aspect ratios from increasing the impact of fluid on the protruding components, thus avoiding the generation of particulate matter during use.

[0049] In one embodiment, the surface of the valve core 17 is formed with a recess, the shape of which corresponds to the arc-shaped protrusion.

[0050] Both the valve core 15 and the valve seat 14 have arc-shaped curved surfaces, which can further increase the collision contact area and disperse the collision stress.

[0051] In one implementation, the valve core tail 18 is umbrella-shaped.

[0052] The buoyancy generated in the liquid can reduce the instantaneous contact speed of the check valve 13 when it is closed, reduce the impact force of the valve core 15 on the valve seat 14, and at the same time prevent the check valve 13 from opening and closing too quickly and forming a strong liquid hammer effect.

[0053] In one implementation, the valve core head 16 is a flat shovel shape.

[0054] When the check valve 13 is closed, a liquid hammer effect is generated below the valve core 15, forming a surge in the fluid pipeline 8. The flat, shovel-shaped valve core head 16 can break the shock wave of the liquid hammer, reducing or even avoiding the formation of pulses.

[0055] In one implementation, the ratio of the length a to the width b of the valve core head 16 is not greater than 3.

[0056] A long and narrow flat valve head 16 can perform better in breaking through hydraulic hammer impacts, but this shape of valve head is more easily broken under long-term hydraulic hammer impacts.

[0057] In one embodiment, at least two longitudinal reinforcing ribs 19 are provided on the flat surfaces of both sides of the valve core head 16. These ribs are used to prevent the valve core head 16 from deforming or breaking when breaking through the hydraulic hammer or under load fluid pressure.

[0058] As one implementation method, the two ends of the reinforcing rib 19 are prismatic or semi-circular prismatic bodies.

[0059] This setting can effectively guide the broken liquid flow, further disperse the impact force of the liquid hammer, weaken the liquid hammer pulse, and improve the stable transport capacity of the diaphragm pump 7.

[0060] As one implementation method, the maximum height h2 of the reinforcing rib 19 does not exceed 3mm.

[0061] This design avoids excessively high reinforcing ribs 19 from hindering fluid flow, while also preventing them from being impacted by lateral fluid flow and weakening the reinforcing effect.

[0062] In this design, the diaphragm pump can be powered by either air or electricity. Under the action of power, one diaphragm expands outward, reducing the volume and increasing the pressure in the pipe on that side. At this time, the inlet check valve closes and the outlet valve opens, allowing liquid to be discharged. The other diaphragm contracts, increasing the volume and decreasing the pressure in the pipe on the same side. At this time, the outlet check valve closes and the inlet valve opens, allowing liquid to be fed in. Under power control, the two diaphragms alternately expand and contract, and the fluid alternately passes through the two pipes to achieve fluid transportation. During this process, the valve core of the check valve moves away from or towards the valve seat and collides with it. The valve core designed in this design can reduce the instantaneous impact pressure generated by the collision, reduce the number of particles generated by the collision, and reduce particulate contamination of the liquid flow.

[0063] 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.

[0064] 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 life span air operated diaphragm pump with improved stability and reduced particulate contamination, characterized in that, include: A base, wherein a plurality of columns are fixedly connected to the upper surface of the base, and a pump body is fixedly connected to the upper end of the columns; A central column is provided in the middle of the pump body. Grooves are provided on both sides of the central column. The grooves are located at the middle position of the central column in the vertical direction. The grooves and the diaphragm form a diaphragm chamber. The pipes are arranged on both sides of the central column. The lower end of the pipes is provided with a fluid inlet, which is connected to the inlet pipe. The upper end of the pipes is provided with a fluid outlet, which is connected to the outlet pipe. The inner wall of the pipeline is provided with several check valves. Each check valve includes a valve seat and a valve core. The valve seat is fixedly connected to the side wall of the pipeline and the connection is smooth. The surface of the valve seat is provided with arc-shaped protrusions. The valve core includes a valve core head, a valve core column and a valve core tail.

2. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 1, wherein, The width of the pipe is d, the convex height of the arc convex is h1, and the total height of the two side arc convexes is related to the pipe width d as 3. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 2, wherein, The base width of the arc-shaped protrusion is L, and the relationship between the base width L and the protrusion height h1 of the arc-shaped protrusion is L≧4h1.

4. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 1, wherein, The surface of the valve core column is formed with a recess, the shape of which corresponds to the arc-shaped protrusion.

5. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 2, wherein, The valve core tail is umbrella-shaped.

6. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 3, wherein, The valve core head is a flat, shovel-shaped part.

7. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 6, wherein, The ratio of the length to the width of the valve core head is no greater than 3.

8. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 6, wherein, At least two longitudinal reinforcing ribs are provided on the flat surfaces on both sides of the valve core head.

9. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 8, wherein, The two ends of the reinforcing rib are prismatic or semi-circular prismatic bodies.

10. The high life span, high stability, low particle contamination air operated diaphragm pump of claim 8, wherein, The maximum height of the reinforcing rib shall not exceed 3mm.

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