A low-pulsation valve plate assembly for an air pump

Abstract

This application relates to a low-pulsation valve plate assembly for an air pump, comprising a pump body and a motor component. The motor component is mounted on the pump body. A lower valve plate is disposed on the top of the pump body, and an upper valve plate that mates with the lower valve plate is disposed on the lower valve plate. An intake valve plate, an exhaust valve plate, and a sealing diaphragm are disposed between the upper and lower valve plates, and a buffer cavity is formed between the upper and lower valve plates to eliminate pulsation generated during air pump operation. This application, through the buffer cavity formed between the upper and lower valve plates, can effectively eliminate pulsation generated during air pump operation. During air pump operation, the process of intake and exhaust of gas will generate periodic pressure fluctuations due to airflow impact and valve plate opening and closing. The buffer cavity can accommodate and buffer instantaneous pressure changes, reducing the impact of pulsation on the overall structure of the pump body, reducing vibration and noise. At the same time, the buffer cavity reduces the direct impact force of airflow on the valve plates, reducing fatigue damage to the valve plates and extending their service life.

Description

Technical Field

[0001] This application relates to the field of small pump technology, and in particular to a low-pulsation valve plate assembly for an air pump. Background Technology

[0002] Air pumps are widely used in medical, industrial, and other fields, but the pulsation problem generated during their operation has always been a technical challenge. Pulsation can cause air pump structural vibration, increased noise, and even affect valve life. Currently, the industry mainly mitigates the pulsation problem by optimizing air pump structural design and adding vibration damping materials, but the effects are limited and the costs are high. In recent years, with the increasing performance requirements of air pumps, developing air pumps with low pulsation and high stability has become a technological development trend.

[0003] The current solution for this type of air pump is to install an additional gas buffer tank at the outlet. However, this increases the number of pipe connections, occupies more space, and brings complexity and size to the entire system. Utility Model Content

[0004] To address the issue that installing an additional gas buffer tank at the outlet increases piping connections, occupies more space, and complicates the entire system, this application provides a low-pulsation valve plate assembly for a gas pump.

[0005] This application provides a low-pulsation valve plate assembly for an air pump, which adopts the following technical solution: A low-pulsation valve plate assembly for an air pump includes a pump body and a motor component mounted on the pump body. A lower valve plate is provided on the top of the pump body, and an upper valve plate that mates with the lower valve plate is provided on the lower valve plate. An inlet valve plate, an outlet valve plate, and a sealing diaphragm are provided between the upper valve plate and the lower valve plate, and a buffer cavity is formed between the upper valve plate and the lower valve plate to eliminate pulsation generated during the operation of the air pump.

[0006] By adopting the above technical solution, the buffer cavity formed between the upper and lower valve plates can effectively eliminate the pulsation generated during the operation of the air pump. During the operation of the air pump, the process of inhaling and exhaling gas will generate periodic pressure fluctuations (i.e., pulsation) due to airflow impact and valve plate opening and closing. The buffer cavity can reduce the impact of pulsation on the overall structure of the pump body by accommodating and buffering instantaneous pressure changes, thereby reducing vibration and noise. At the same time, the buffer cavity reduces the direct impact force of airflow on the valve plate (especially at the moment when the valve plate just opens or closes), thereby reducing fatigue damage to the valve plate and extending its service life.

[0007] Preferably, an air inlet pipe is provided on one side of the upper valve plate, and an air outlet pipe is provided on the other side of the upper valve plate away from the air inlet pipe, with the air inlet pipe and the air outlet pipe corresponding to each other.

[0008] By adopting the above technical solution, the relatively set inlet and outlet pipes can form a more balanced "inlet-out circulation" of airflow in the buffer cavity, so that the inhaled gas enters the pump body, is discharged from the discharge valve plate and enters the cavity, can be fully diffused and pressure balanced in the cavity, and then is smoothly discharged from the outlet pipe on the opposite side, avoiding "local airflow impact superposition" caused by the inlet and outlet positions being too close.

[0009] Preferably, the lower valve plate is provided with a placement block for placing the suction valve plate and the discharge valve plate, and the upper valve plate is provided with a pressing block for pressing the suction valve plate. The pressing block is connected to the air inlet pipe and the pump body. The side of the pressing block near the discharge valve plate is provided with a limiting block for limiting the discharge valve plate. The limiting block is provided with a protrusion for preventing the discharge valve plate from falling off.

[0010] By adopting the above technical solution, through the division of labor and cooperation of the placement block, pressing block, limiting block and protrusion, the precise positioning and reliable fixation of the intake valve plate and the exhaust valve plate are ensured, while adapting to the different action requirements of the two (intake requires sealing, exhaust requires flexibility), and at the same time taking into account the smoothness of the air passage and the durability of the valve plate, the stability, efficiency and maintenance convenience of the entire valve plate assembly are ultimately improved.

[0011] Preferably, the upper valve plate and the lower valve plate are connected in a detachable manner, and the upper valve plate and the lower valve plate are connected and fixed by bolts.

[0012] By adopting the above technical solution, since the suction valve plate, discharge valve plate, and sealing diaphragm between the upper and lower valve plates are high-frequency moving or easily aged components, the bolt connection allows for direct disassembly of the upper valve plate, enabling quick replacement of these vulnerable parts without the need to replace the entire valve plate assembly or air pump. This significantly reduces maintenance time and costs. Furthermore, long-term operation of the air pump may cause impurities (such as dust and moisture condensation) to accumulate in the buffer cavity or on the valve plate surface, affecting airflow stability or sealing performance. The detachable design allows operators to disassemble the valve plate to clean and inspect the internal structure (such as the buffer cavity and valve plate contact surface), preventing performance degradation or malfunctions caused by impurities.

[0013] Preferably, the upper and lower valve plates are provided with mutually cooperating protrusions at the connection points with the sealing diaphragm, and the sealing diaphragm is made of rubber material, and the sealing diaphragm is in close contact with both the upper and lower valve plates.

[0014] By adopting the above technical solution, when the air pump is working, the pressure fluctuation in the buffer cavity will cause the diaphragm to undergo slight deformation. The raised structure can "anchor" the position of the diaphragm, preventing it from displacing excessively under pressure, ensuring that the sealing contact area always maintains effective fit, and reducing instantaneous leakage caused by diaphragm "drift".

[0015] Preferably, a portion of the suction valve plate is the same as the discharge valve plate, and the discharge valve plate and the suction valve plate operate synchronously.

[0016] By adopting the above technical solution, the pump's valve plate is widened laterally, and the discharge buffer chamber is designed to maximize the use of the original space, which fully improves the pump body's space utilization rate and ensures that the function of eliminating pulsation is added within the original volume. It has the advantages of simple structure and high integration.

[0017] Preferably, both the upper and lower valve plates are provided with positioning blocks for mounting the upper valve plate, and the positioning blocks are provided with mounting holes for bolt mounting.

[0018] By adopting the above technical solution, the positioning block can be inserted into or attached to the corresponding positioning structure to achieve the "pre-fixation" of the valve plate. The initial alignment can be completed without long-term manual support or calibration. Subsequently, only the bolts need to be tightened through the mounting holes, which greatly shortens the assembly time.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. The buffer cavity formed between the upper and lower valve plates can effectively eliminate the pulsation generated during the operation of the air pump. During the operation of the air pump, the process of inhaling and exhaling gas will generate periodic pressure fluctuations (i.e., pulsation) due to airflow impact and valve plate opening and closing. The buffer cavity can reduce the impact of pulsation on the overall structure of the pump body by accommodating and buffering instantaneous pressure changes, thereby reducing vibration and noise. At the same time, the buffer cavity reduces the direct impact force of airflow on the valve plate (especially at the moment when the valve plate just opens or closes), thereby reducing fatigue damage to the valve plate and extending its service life. 2. The bolted connection allows for direct disassembly of the valve upper plate, enabling quick replacement of these vulnerable parts without the need to replace the entire valve plate assembly or air pump. This significantly reduces maintenance time and costs. Furthermore, long-term operation of the air pump can lead to the accumulation of impurities (such as dust and moisture condensation) on the buffer cavity or valve plate surface, affecting airflow stability or sealing performance. The detachable design allows operators to disassemble the valve plate to clean and inspect the internal structure (such as the buffer cavity and valve plate contact surfaces), preventing performance degradation or malfunctions caused by impurities. 3. The pump's valve plate is widened laterally, and the discharge buffer chamber is built-in to maximize the use of the original space, which fully improves the pump body's space utilization rate and ensures that the function of eliminating pulsation is added within the original volume. It has the advantages of simple structure and high integration. Attached Figure Description

[0020] Figure 1 This is a front-view three-dimensional structural diagram of a low-pulsation valve plate assembly used in an air pump; Figure 2 This is a three-dimensional view of the structure of the valve lower plate and the pump body of the low-pulsation valve plate assembly used in air pumps. Figure 3 This is a top-view sectional perspective view of a low-pulsation valve plate assembly used in an air pump; Figure 4 This is a three-dimensional view of the valve upper plate. Figure 5 This is a three-dimensional structural diagram of the valve lower plate and the pump body. Figure 6 This is a bottom sectional view of a low-pulsation valve plate assembly used in an air pump.

[0021] Reference numerals: 1. Pump body; 2. Motor components; 3. Lower valve plate; 4. Upper valve plate; 5. Suction valve plate; 6. Discharge valve plate; 7. Sealing diaphragm; 8. Buffer cavity; 9. Inlet pipe; 10. Outlet pipe; 11. Pressing block; 12. Positioning block; 13. Mounting hole; 14. Placement block; 15. Limiting block; 16. Protrusion; 17. Raised shape. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail.

[0023] This application discloses a low-pulsation valve plate assembly for an air pump.

[0024] Reference Figure 1 and Figure 2 A low-pulsation valve plate assembly for an air pump includes a pump body 1, a motor component 2, an upper valve plate 4, a lower valve plate 3, an intake valve 5, an exhaust valve 6, and a sealing diaphragm 7. The motor component 2 is fixedly mounted at the bottom of the pump body 1. The lower valve plate 3 is bolted to the top of the pump body 1, and the upper valve plate 4 is bolted to the top of the lower valve plate 3. The intake valve 5, exhaust valve 6, and sealing diaphragm 7 are mounted between the upper valve plate 4 and the lower valve plate 3. The intake valve 5 is located at the intake port of the pump body 1, and the exhaust valve 6 is located at the discharge port of the pump body 1. A buffer cavity 8 is formed to eliminate the pulsation generated during the operation of the air pump. The buffer cavity 8 formed between the upper valve plate 4 and the lower valve plate 3 can effectively eliminate the pulsation generated during the operation of the air pump. During the operation of the air pump, the process of inhaling and exhaling gas will generate periodic pressure fluctuations due to airflow impact and valve plate opening and closing. The buffer cavity 8 can reduce the impact of pulsation on the overall structure of the pump body 1 by accommodating and buffering instantaneous pressure changes, thereby reducing vibration and noise. At the same time, the buffer cavity 8 reduces the direct impact force of airflow on the valve plate, thereby reducing fatigue damage to the valve plate and extending its service life.

[0025] refer to Figure 1 and Figure 2An air inlet pipe 9 is fixedly connected to one side of the upper valve plate 4, and an air outlet pipe 10 is fixedly connected to the other side of the upper valve plate 4 away from the air inlet pipe 9. Both the air inlet pipe 9 and the air outlet pipe 10 are connected to the buffer cavity 8 formed by the upper valve plate 4 and the lower valve plate 3, and the air inlet pipe 9 and the air outlet pipe 10 correspond to each other. The relatively arranged air inlet and air outlet pipes 10 can make the airflow form a more balanced "inlet and outlet cycle" in the buffer cavity 8, so that the gas drawn in can be discharged from the discharge valve plate 6 through the pump body 1 and enter the buffer cavity 8. It can be fully diffused and the pressure is balanced in the buffer cavity 8, and then it can be smoothly discharged from the air outlet pipe 10, avoiding the "local airflow impact superposition" caused by the air inlet and air outlet being too close.

[0026] refer to Figure 1 and Figure 2 The upper valve plate 4 and the lower valve plate 3 are detachably connected and secured with bolts. Since the suction valve plate 5, discharge valve plate 6, and sealing diaphragm 7 between the upper and lower valve plates 4 and 3 are high-frequency moving or easily aged components, the bolt connection allows for direct disassembly of the upper valve plate 4, enabling quick replacement of these vulnerable parts without the need to replace the entire valve plate assembly or air pump. This significantly reduces maintenance time and costs. Furthermore, long-term operation of the air pump may cause impurities to accumulate in the buffer cavity 8 or on the valve plate surface, affecting airflow stability or sealing performance. The detachable design allows operators to disassemble the valve plate for cleaning and inspection of the internal structure, preventing performance degradation or malfunctions caused by impurities.

[0027] refer to Figure 2 and Figure 3 A portion of the suction valve plate 5 is the same as the discharge valve plate 6, and the discharge valve plate 6 and the suction valve plate 5 operate synchronously. The valve plate of the pump is widened laterally, and the discharge buffer chamber is designed to maximize the use of the original space, which fully improves the space utilization of the pump body and ensures that the function of eliminating pulsation is added within the original volume. It has the advantages of simple structure and high integration.

[0028] refer to Figure 3 , Figure 4 and Figure 5Both the upper valve plate 4 and the lower valve plate 3 have mutually cooperating protrusions 17 at their connection points with the sealing diaphragm 7. The sealing diaphragm 7 is made of rubber and fits snugly against both the upper valve plate 4 and the lower valve plate 3. In addition to using a rubber diaphragm, sealing rings and recessed structures can be designed to achieve the same sealing effect. When the air pump is working, pressure fluctuations in the buffer cavity 8 will cause slight deformation of the sealing diaphragm 7. The protrusion 17 structure can "anchor" the position of the sealing diaphragm 7, preventing it from displacing excessively under pressure. This ensures that the sealing contact area always maintains effective contact and reduces instantaneous leakage caused by the "drift" of the sealing diaphragm 17. At the same time, when the protrusion 17 contacts the sealing diaphragm 7, the rubber undergoes local deformation due to pressure. The pressure at the contact point is much higher than that of the flat contact area (under the same bolt preload, the protrusion has a smaller contact area and a greater unit pressure), which can more tightly fill the tiny gaps and achieve better sealing between the upper valve plate 4 and the lower valve plate 3.

[0029] refer to Figure 4 and Figure 5 The lower valve plate is provided with a placement block 14 for placing the suction valve plate 5 and the discharge valve plate 6. The suction valve plate 5 and the discharge valve plate 6 are installed on the placement block 14. The upper valve plate 4 is provided with a clamping block 11 for pressing the suction valve plate 5. The placement block 14 of the lower valve plate 3 provides a standardized placement platform for the suction valve plate 5 and the discharge valve plate 6, ensuring that the initial installation position of the valve plates is uniform (such as the alignment with the flow channel opening and the consistent fit gap with the sealing diaphragm), avoiding "valve plate covering the flow channel" (affecting the air flow) or "deviating from the sealing area" caused by manual placement deviation. The clamping block 11 is connected to the air inlet pipe 9 and the pump body 1, which means that its position is directly facing the suction channel. The clamping force acts directly on the key sealing area of ​​the suction valve plate, ensuring that the valve plate can fit tightly against the sealing surface during suction. At the same time, the rigid clamping can resist the negative pressure impact during the suction stage. The clamping block 11 and the placement block 14 cooperate to limit and clamp the intake valve plate 5. The clamping block 11 is provided with a limiting block 15 for limiting the exhaust valve plate 6 on the side near the exhaust valve plate 6. The limiting block 15 is provided with a protrusion 16 to prevent the exhaust valve plate 6 from falling off. During the exhaust stage, the exhaust valve plate 6 is impacted by the high-pressure airflow and is prone to large deformation or displacement. The limiting block 15 restricts its excessive displacement by lateral constraint, while the protrusion 16 blocks the exhaust valve plate 6 from falling out of the installation position from the axial direction. Thus, through the division of labor and cooperation of the placement block 14, the clamping block 11, the limiting block 15 and the protrusion 16, the accurate positioning and reliable fixation of the intake valve plate 5 and the exhaust valve plate 6 are ensured, and the different action requirements of the two are adapted to (the intake needs to be sealed and the exhaust needs to be flexible). At the same time, the air passage is unobstructed and the valve plate is durable, which ultimately improves the stability, efficiency and maintenance convenience of the entire valve plate assembly.

[0030] refer to Figure 6Positioning blocks 12 are fixedly connected to both the upper valve plate 4 and the lower valve plate 3. The positioning blocks 12 are used for positioning the upper valve plate 4 and the lower valve plate 3. The positioning blocks 12 are provided with mounting holes 13 for bolt installation. The bolts are connected to the positioning blocks 12 to fix the upper valve plate 4 and the lower valve plate 3. The positioning blocks 12 can be inserted into or fitted to the corresponding positioning structure to achieve "pre-fixation" of the valve plate. Initial alignment can be completed without long-term manual support or calibration. Afterwards, only the bolts need to be tightened through the mounting holes 13, which greatly shortens the assembly time.

[0031] Furthermore, the valve plate type in this application is not limited to cantilever beam valves, but can also be umbrella valves, wheel valves, duckbill valves, or other check valves.

[0032] The implementation principle of this application embodiment is as follows: In implementation, air is introduced through the inlet pipe, and the gas enters the pump body 1 through the suction valve plate 5 set between the upper valve plate 4 and the lower valve plate 3 for use. Then, it is discharged from the discharge valve plate 6 and enters the buffer cavity 8 set between the upper valve plate 4 and the lower valve plate 3 for buffering. This reduces the periodic pressure fluctuations caused by airflow impact and valve plate opening and closing during the process of gas intake and discharge, reduces the impact of pulsation on the overall structure of the pump body 1, and reduces vibration and noise.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-pulsation valve plate assembly for an air pump, comprising a pump body (1) and a motor component (2), characterized in that, The motor component (2) is mounted on the pump body (1). A lower valve plate (3) is provided on the top of the pump body (1). An upper valve plate (4) is provided on the lower valve plate (3) to cooperate with the lower valve plate (3). A suction valve plate (5), a discharge valve plate (6) and a sealing diaphragm (7) are provided between the upper valve plate (4) and the lower valve plate (3). A buffer cavity (8) is formed between the upper valve plate (4) and the lower valve plate (3) to eliminate the pulsation generated during the operation of the air pump.

2. The low-pulsation valve plate assembly for an air pump according to claim 1, characterized in that, An air inlet pipe (9) is provided on one side of the upper valve plate (4), and an air outlet pipe (10) is provided on the other side of the upper valve plate (4) away from the air inlet pipe (9). The air inlet pipe (9) and the air outlet pipe (10) correspond to each other.

3. The low-pulsation valve plate assembly for an air pump according to claim 1, characterized in that, The lower valve plate is provided with a placement block (14) for placing the suction valve plate (5) and the discharge valve plate (6). The upper valve plate (4) is provided with a pressing block (11) for pressing the suction valve plate (5). The pressing block (11) is connected to the air inlet pipe (9) and the pump body (1). The side of the pressing block (11) near the discharge valve plate (6) is provided with a limiting block (15) for limiting the discharge valve plate (6). The limiting block (15) is provided with a protrusion (16) for preventing the discharge valve plate (6) from falling off.

4. The low-pulsation valve plate assembly for an air pump according to claim 1, characterized in that, The valve upper plate (4) and valve lower plate (3) are connected in a detachable manner, and the valve upper plate (4) and valve lower plate (3) are connected and fixed by bolts.

5. The low-pulsation valve plate assembly for an air pump according to claim 1, characterized in that, The upper valve plate (4) and lower valve plate (3) are provided with mutually cooperating protrusions (17) at the connection with the sealing diaphragm (7), and the sealing diaphragm (7) is made of rubber material. The sealing diaphragm (7) is in close contact with the upper valve plate (4) and lower valve plate (3).

6. The low-pulsation valve plate assembly for an air pump according to claim 1, characterized in that, A portion of the inhalation valve plate (5) is the same as the discharge valve plate (6), and the discharge valve plate (6) and the inhalation valve plate (5) operate synchronously.

7. The low-pulsation valve plate assembly for an air pump according to claim 1, characterized in that, Both the upper valve plate (4) and the lower valve plate (3) are provided with positioning blocks (12) for mounting the upper valve plate (4), and the positioning blocks (12) are provided with mounting holes (13) for bolt mounting.

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