Diaphragm pump and water purification apparatus

Abstract

The diaphragm pump and water purification equipment of the application, the diaphragm pump comprises a diaphragm pump body, a leak stop valve cover, an inlet and outlet water cover, a leak stop diaphragm and an elastic piece, the diaphragm pump body comprises a one-way valve fixing seat; the leak stop valve cover is installed on the one-way valve fixing seat, the leak stop valve cover has a water inlet, a valve port and a water outlet, the water outlet is communicated with the valve port, and the water inlet is communicated with the valve port through the one-way valve fixing seat; the inlet and outlet water cover is formed with a water inlet pipe, an inner groove and a water outlet pipe, the water inlet pipe and the water outlet pipe are arranged in parallel, and the inner groove is arranged at a position between the water inlet pipe and the water outlet pipe and is communicated with the water inlet pipe; the leak stop diaphragm is installed between the leak stop valve cover and the inlet and outlet water cover and abuts against and seals the leak stop valve cover and the inlet and outlet water cover respectively, the leak stop diaphragm is provided with a first through hole and a second through hole, the water inlet pipe is communicated with the water inlet through the first through hole, and the water outlet is communicated with the water outlet pipe through the second through hole; the elastic piece is accommodated in the inner groove and is abutted against and limited by the leak stop diaphragm and the inlet and outlet water cover respectively and is used for pushing and jacking the leak stop diaphragm to block the valve port.

Description

Technical Field

[0001] This utility model belongs to the technical field of flow control, and in particular relates to a diaphragm pump and a water purification device. Background Technology

[0002] Diaphragm pumps are key components in water treatment systems for water purification equipment, primarily used for precise liquid delivery and stable control of flow rate and pressure.

[0003] When the diaphragm pump in a water purification system is installed below the water tank, the liquid may flow backwards inside the diaphragm pump when the pump is stopped due to the gravitational potential energy of the water in the tank and the water pressure difference. This backflow not only affects the normal operation of the entire water purification system, but may also cause the internal pressure of the diaphragm pump to rise abnormally. Long-term accumulation can damage the seals, and in severe cases, it may even cause the entire diaphragm pump to leak. Utility Model Content

[0004] In view of this, it is necessary to provide a diaphragm pump and water purification equipment for solving the above-mentioned technical problems.

[0005] A diaphragm pump, the diaphragm pump comprising:

[0006] The diaphragm pump body includes a check valve mounting base;

[0007] A leak-proof valve cover is installed on the one-way valve fixing seat. The leak-proof valve cover has an inlet, a valve port, and an outlet. The outlet is connected to the valve port, and the inlet is connected to the valve port through the one-way valve fixing seat.

[0008] The inlet and outlet cover is installed on the leak-proof valve cover at one end away from the one-way valve fixing seat. The inlet and outlet cover has an inlet pipe, an inner groove and an outlet pipe. The inlet pipe and the outlet pipe are arranged parallel to each other. The inner groove is located between the inlet pipe and the outlet pipe and is connected to the inlet pipe.

[0009] A leak-proof diaphragm is installed between the leak-proof valve cover and the inlet / outlet cover, and abuts and seals against the leak-proof valve cover and the inlet / outlet cover respectively. The leak-proof diaphragm has a first through hole and a second through hole. The inlet pipe is connected to the inlet through the first through hole, and the outlet is connected to the outlet pipe through the second through hole.

[0010] An elastic element is housed within the inner groove and is positioned to abut against the leak-proof diaphragm and the inlet / outlet water cap, thereby pushing the leak-proof diaphragm to seal the valve port.

[0011] Understandably, the leak-proof diaphragm, through the combined action of the elastic element and the water in the inner groove, seals the valve port, preventing water backflow from occurring when the diaphragm pump is stopped. This solves the leakage problem caused by the water level difference between the diaphragm pump and the water tank. At the same time, the leak-proof diaphragm provides a sealing function for the inlet / outlet covers and the leak-proof valve cover, eliminating the need for a separate sealing ring structure. This simplifies the structure and reduces costs.

[0012] In one embodiment, the leak-proof diaphragm is fitted and positioned with the leak-proof valve cover in a concave-convex fit.

[0013] Understandably, by utilizing the interlocking fit between the leak-proof diaphragm and the leak-proof valve cover, the leak-proof diaphragm can be positioned and assembled on the leak-proof valve cover. This not only ensures the accuracy of the assembly position between the leak-proof diaphragm and the leak-proof valve cover, but also facilitates the assembly of the leak-proof diaphragm on the leak-proof valve cover.

[0014] In one embodiment, the leak-proof valve cover protrudes from a direction away from the one-way valve fixing seat and forms an extended boss, the water inlet, the valve port and the water outlet are all disposed through the extended boss, and the leak-proof diaphragm is fitted onto the extended boss.

[0015] The leak-proof valve cover has a groove on the periphery of the extended boss, and the groove can engage with the leak-proof diaphragm.

[0016] In one embodiment, a limiting rib is formed on the inlet / outlet cover. The limiting rib is disposed around the extension boss and abuts against the leak-proof diaphragm for limiting and pressing the leak-proof diaphragm into the groove.

[0017] In one embodiment, the leak-proof diaphragm has a foolproof part that engages with the groove.

[0018] Understandably, the foolproof feature on the leak-proof diaphragm can prevent the leak-proof diaphragm from being mistakenly assembled on the leak-proof valve cover, which further facilitates the assembly of the leak-proof diaphragm on the leak-proof valve cover.

[0019] In one embodiment, the water inlet pipe is connected to the water inlet and forms a water inlet channel;

[0020] The inlet / outlet cover and / or the leak-proof valve cover are provided with a first sealing rib around the water inlet channel, and the first sealing rib abuts against the leak-proof diaphragm for sealing.

[0021] It is understandable that by utilizing the abutment seal between the first sealing rib and the leak-proof diaphragm, the leak-proof diaphragm can play a role in assembling and sealing the water inlet channel formed between the leak-proof valve cover and the inlet / outlet cover.

[0022] In one embodiment, the water outlet pipe is connected to the water outlet and forms a water outlet channel;

[0023] The inlet / outlet cover and / or the leak-proof valve cover are provided with a second sealing rib around the water outlet channel, and the second sealing rib abuts against the leak-proof diaphragm for sealing.

[0024] It is understandable that by utilizing the abutment seal between the second sealing rib and the leak-proof diaphragm, the leak-proof diaphragm can play a role in sealing the water outlet channel between the leak-proof valve cover and the inlet / outlet cover.

[0025] In one embodiment, the diaphragm pump body further includes a main diaphragm, which abuts and seals against the one-way valve mounting seat;

[0026] Five compression chambers are formed on the main diaphragm, and an inlet check valve is installed at the location of each compression chamber; and an outlet check valve is installed at the center of the five compression chambers.

[0027] It is understandable that the five compression chambers on the main diaphragm are used to control the water output of the diaphragm pump during operation, which can increase the water output of the diaphragm pump during operation.

[0028] In one embodiment, the outlet check valve has a valve disc, which is disposed on one end of the check valve mounting base facing the leak-proof valve cover and abuts against the check valve mounting base to seal.

[0029] The leak-proof valve cover has a pressure-relief protrusion, which abuts against and limits the valve disc.

[0030] Understandably, the pressure protrusion on the leak-proof valve cover is used to press against the valve disc of the limiting outlet check valve. This allows the valve disc of the outlet check valve to better fit against the outlet check valve, thereby improving the sealing performance of the outlet check valve and ensuring that the five compression chambers are independent of each other.

[0031] This application also provides a water purification device, including the diaphragm pump described above.

[0032] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0033] The diaphragm pump and water purification equipment claimed in this application use a leak-proof diaphragm that, under the combined action of the elastic element and the water in the inner groove, seals the valve port, preventing water backflow when the diaphragm pump is stopped. This solves the leakage problem caused by the water level difference between the diaphragm pump and the water tank. At the same time, the leak-proof diaphragm provides a sealing function for the inlet / outlet covers and the leak-proof valve cover, eliminating the need for a separate sealing ring, thus simplifying the structure and reducing costs. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is an exploded view of the diaphragm pump provided in this application.

[0036] Figure 2 This is a cross-sectional view of the diaphragm pump provided in this application.

[0037] Figure 3 for Figure 2 Enlarged view of a portion of the image.

[0038] Figure 4 This is a schematic diagram of the structure of the leak-proof valve cover and the leak-proof diaphragm in this application.

[0039] Figure 5 This is a schematic diagram of the water inlet / outlet cover in this application.

[0040] Reference numerals: 100, Diaphragm pump; 10, Diaphragm pump body; 11, Check valve mounting seat; 12, Main diaphragm; 1201, Compression chamber; 13, Motor mounting seat; 14, Motor; 15, Eccentric wheel; 16, Sealing gasket; 17, Outlet check valve; 171, Valve disc; 20, Leak-proof valve cover; 21, Inlet; 22, Valve port; 23, Outlet; 24, Extension boss; 25, Groove; 26 30. Pressing protrusion; 31. Inlet / outlet cover; 32. Inlet pipe; 33. Inner groove; 34. Outlet pipe; 35. Guide groove; 46. Limiting rib; 47. Leak-proof diaphragm; 48. First through hole; 49. Second through hole; 40. Anti-fooling part; 50. Elastic element; 101. Screw; 110. Inlet channel; 111. First sealing rib; 120. Outlet channel; 121. Second sealing rib. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] The diaphragm pump 100 claimed in this application is used in water purification equipment to control the water flow in the water inlet system of the water purification equipment. Here, the water tank in the water purification equipment is installed at a higher position than the diaphragm pump 100. It should be noted that the diaphragm pump 100 of this application can also be applied to medical equipment, industrial fluid control, and other application scenarios.

[0045] like Figures 1 to 5As shown, the diaphragm pump 100 provided in this application includes a diaphragm pump body 10, a leak-proof valve cover 20, inlet and outlet covers 30, a leak-proof diaphragm 40, and an elastic element 50. The diaphragm pump body 10 includes a one-way valve fixing seat 11. The leak-proof valve cover 20 is installed on the one-way valve fixing seat 11 and has an inlet 21, a valve port 22, and an outlet 23. The outlet 23 communicates with the valve port 22, and the inlet 21 communicates with the valve port 22 through the one-way valve fixing seat 11. The inlet and outlet covers 30 are installed on the end of the leak-proof valve cover 20 away from the one-way valve fixing seat 11. The inlet and outlet covers 30 have an inlet pipe 31, an inner groove 32, and an outlet pipe 33 formed on them. Parallel to the outlet pipe 33, the inner groove 32 is positioned between the inlet pipe 31 and the outlet pipe 33 and communicates with the inlet pipe 31. A leak-proof diaphragm 40 is installed between the leak-proof valve cover 20 and the inlet / outlet cover 30, respectively abutting and sealing against both. The leak-proof diaphragm 40 has a first through hole 401 and a second through hole 402. The inlet pipe 31 communicates with the inlet 21 through the first through hole 401, and the outlet 23 communicates with the outlet pipe 33 through the second through hole 402. An elastic element 50 is housed within the inner groove 32 and abuts and limits the leak-proof diaphragm 40 against the inlet / outlet cover 30, used to push the leak-proof diaphragm 40 to seal the valve port 22. Here, the elastic element 50 is configured as a spring, rubber sleeve, or other highly elastic accessory.

[0046] As can be seen from the above, the leak-proof diaphragm 40 of the diaphragm pump 100 of this application seals the valve port 22 under the combined action of the elastic element 50 and the water in the inner groove 32, so that the diaphragm pump 100 will not experience water backflow when it is stopped, thereby solving the water leakage problem caused by the water level difference between the diaphragm pump 100 and the water tank; at the same time, the leak-proof diaphragm 40 plays a role in assembling and sealing the inlet and outlet covers 30 and the leak-proof valve cover 20, eliminating the need for a separate sealing ring structure, which simplifies the structure and reduces costs.

[0047] It should be noted that the diaphragm pump 100 of this application drives the leak-proof diaphragm 40 to seal the valve port 22 through the combined action of the elastic element 50 and the water in the inner groove 32. Compared with the traditional single spring or gravity anti-backflow valve, the sealing response speed is fast and the sealing effect is good, making it particularly suitable for the application scenario of high-level water tanks that are frequently started and stopped.

[0048] like Figure 1 , Figure 2As shown, in one embodiment, the diaphragm pump body 10 further includes a main diaphragm 12, a motor mounting base 13, a motor 14, and an eccentric wheel 15. The main diaphragm 12 is installed between the motor mounting base 13 and the one-way valve mounting base 11, and is fixed by a screw 101 that passes sequentially through the inlet / outlet cover 30, the leak-proof valve cover 20, the one-way valve mounting base 11, and then between the main diaphragm 12 and the motor mounting base 13, so that the main diaphragm 12 abuts and seals against both the one-way valve mounting base 11 and the motor mounting base 13. The motor 14 is installed on the motor mounting base 13 and is connected to the eccentric wheel 15 for transmission. Here, the one-way valve mounting base 11 and the leak-proof valve cover 20 are assembled and sealed by a sealing gasket 16.

[0049] like Figure 2 As shown, in this embodiment, five compression chambers 1201 are formed on the main diaphragm 12. A one-way valve mounting base 11 is installed at the location of each compression chamber 1201 (not shown in the figure); and an outlet one-way valve 17 is installed at the center position between the five compression chambers 1201 on the one-way valve mounting base 11. That is, when the diaphragm pump 100 is running, the inlet and outlet can be controlled by the five compression chambers 1201 on the main diaphragm 12, thereby increasing the water output of the diaphragm pump 100. Here, the inlet one-way valve is used to control the one-way inlet of water into the five compression chambers 1201, and the outlet one-way valve 17 is used to control the one-way outlet of water from the five compression chambers 1201, to meet the operational requirements of the diaphragm pump 100.

[0050] like Figure 3 , Figure 4 As shown, in one embodiment, the inlet / outlet cover 30 has a guide groove 34 between the inlet pipe 31 and the inner groove 32, and the inlet pipe 31 is connected to the inner groove 32 through the guide groove 34, thus achieving communication between the inlet pipe 31 and the inner groove 32. When the diaphragm pump 100 is installed in a water purification device, water in the inlet pipe 31 can be guided into the inner groove 32 through the guide groove 34. Here, the cross-sectional area for water flow in the guide groove 34 is small, ensuring that the presence of the guide groove 34 does not affect the normal operation of the diaphragm pump 100.

[0051] like Figure 3 , Figure 4 As shown, in one embodiment, the leak-proof diaphragm 40 is assembled and positioned with the leak-proof valve cover 20 in a concave-convex fit, thereby achieving the assembly and positioning of the leak-proof diaphragm 40 on the leak-proof valve cover 20. This not only ensures the accuracy of the assembly position between the leak-proof diaphragm 40 and the leak-proof valve cover 20, but also facilitates the assembly of the leak-proof diaphragm 40 on the leak-proof valve cover 20.

[0052] like Figure 4As shown, in this embodiment, the leak-proof valve cover 20 protrudes from the direction away from the one-way valve fixing seat 11 and forms an extended boss 24. The inlet 21, valve port 22 and outlet 23 are all disposed through the extended boss 24, and the leak-proof diaphragm 40 is fitted on the extended boss 24. Furthermore, the leak-proof valve cover 20 has a groove 25 on the periphery of the extended boss 24. The groove 25 can engage with the leak-proof diaphragm 40 to achieve a concave-convex fit between the leak-proof diaphragm 40 and the leak-proof valve cover 20.

[0053] like Figure 3 , Figure 5 As shown, in this embodiment, a limiting rib 35 is formed on the inlet / outlet cover 30. The limiting rib 35 is disposed around the extension boss 24 and abuts against the leak-proof diaphragm 40 for limiting and pressing the leak-proof diaphragm 40 into the groove 25. That is to say, the water inlet 21 and water outlet 23 on the leak-proof valve cover 20 of this embodiment are wrapped and sealed by the leak-proof diaphragm 40 to prevent leakage.

[0054] like Figure 4 As shown, in this embodiment, a foolproof part 41 is formed on the leak-proof diaphragm 40. The foolproof part 41 engages with the groove 25, thereby preventing the leak-proof diaphragm 40 from being assembled onto the leak-proof valve cover 20, which further facilitates the assembly of the leak-proof diaphragm 40 onto the leak-proof valve cover 20. Here, the foolproof part 41 allows the screw 101 to pass through.

[0055] like Figure 2 , Figure 3 and Figure 5 As shown, in one embodiment, the water inlet pipe 31 is connected to the water inlet 21 to form a water inlet channel 110; the inlet / outlet cover 30 and / or the leak-proof valve cover 20 are provided with a first sealing rib 111 around the water inlet channel 110. The first sealing rib 111 abuts and seals with the leak-proof diaphragm 40, so that the leak-proof diaphragm 40 can perform the function of assembling and sealing the water inlet channel 110 formed between the leak-proof valve cover 20 and the inlet / outlet cover 30. Here, the first sealing rib 111 is provided on the inlet / outlet cover 30, and the end face of the leak-proof valve cover 20 that supports the leak-proof diaphragm 40 is flat. It can be understood that in other embodiments, the first sealing rib 111 can also be provided on the leak-proof valve cover 20, which will not be elaborated here.

[0056] like Figure 2 , Figure 3 and Figure 5As shown, in one embodiment, the water outlet pipe 33 is connected to the water outlet 23 to form a water outlet channel 120; the inlet / outlet cover 30 and / or the leak-proof valve cover 20 are provided with a second sealing rib 121 around the water outlet channel 120, and the second sealing rib 121 abuts against the leak-proof diaphragm 40 for sealing. This allows the leak-proof diaphragm 40 to perform an assembly and sealing function on the water outlet channel 120 formed between the leak-proof valve cover 20 and the inlet / outlet cover 30. Here, the second sealing rib 121 is provided on the inlet / outlet cover 30, and the end face of the leak-proof valve cover 20 that supports the leak-proof diaphragm 40 is planar. It can be understood that in other embodiments, the second sealing rib 121 may also be provided on the leak-proof valve cover 20, which will not be elaborated here. Here, the second sealing rib 121 is connected to the first sealing rib 111.

[0057] like Figure 3 As shown, in one embodiment, the outlet check valve 17 has a valve disc 171, which is disposed on the one-way valve mounting base 11 at one end facing the check valve cover 20 and abuts against the check valve mounting base 11 for sealing; and a pressure protrusion 26 is formed on the check valve cover 20, which abuts against and limits the valve disc 171, so that the valve disc 171 of the outlet check valve 17 can better fit against the check valve mounting base 11, thereby improving the sealing performance of the outlet check valve 17 and ensuring that the five compression chambers 1201 are independent of each other.

[0058] In summary, when the diaphragm pump 100 of this application is operating normally, the motor 14 controls the eccentric wheel 15 to sequentially squeeze the compression chamber 1201 of the main diaphragm 12. The pressure difference controls the opening of the outlet check valve 17 and the inlet check valve, respectively, to control the water output from the outlet pipe 33. During this process, the flowing water only needs to overcome the elastic pre-pressure of the elastic element 50 to fully open the valve port 22, which is blocked by the leak-proof diaphragm 40, forming an almost direct flow channel with a low resistance coefficient, ensuring that the high-flow water delivery performance of the diaphragm pump 100 is not affected. When the motor 14 of the diaphragm pump 100 stops running, the elastic element 50 can push the leak-proof diaphragm 40 to close the valve port 22. Under the pressure of the water in the inner groove 32 and the synergistic effect of the elastic element 50, the leak-proof diaphragm 40 can completely block the valve port 22 and prevent backflow. It should be noted that, under a reverse pressure test of 1.5 MPa, the leakage of the diaphragm pump 100 of this application is less than 0.1 ml / min, which meets the industrial-grade sealing standard.

[0059] This application also provides a water purification device, including the diaphragm pump 100 described above.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A diaphragm pump, characterized in that, The diaphragm pump (100) includes: The diaphragm pump body (10) includes a check valve mounting seat (11). A leak-proof valve cover (20) is installed on the one-way valve fixing seat (11). The leak-proof valve cover (20) has an inlet (21), a valve port (22) and an outlet (23). The outlet (23) is connected to the valve port (22). The inlet (21) is connected to the valve port (22) through the one-way valve fixing seat (11). The inlet and outlet cover (30) is installed on the leak-proof valve cover (20) at one end away from the one-way valve fixing seat (11). The inlet and outlet cover (30) has an inlet pipe (31), an inner groove (32) and an outlet pipe (33). The inlet pipe (31) and the outlet pipe (33) are arranged parallel to each other. The inner groove (32) is located between the inlet pipe (31) and the outlet pipe (33) and is connected to the inlet pipe (31). A leak-proof diaphragm (40) is installed between the leak-proof valve cover (20) and the inlet / outlet cover (30), and respectively abuts and seals against the leak-proof valve cover (20) and the inlet / outlet cover (30). The leak-proof diaphragm (40) has a first through hole (401) and a second through hole (402). The inlet pipe (31) passes through the first through hole (401) and communicates with the inlet (21). The outlet (23) passes through the second through hole (402) and communicates with the outlet pipe (33). The elastic element (50) is housed in the inner groove (32) and abuts against the leak-proof diaphragm (40) and the inlet / outlet cover (30) respectively, and is used to push the leak-proof diaphragm (40) to block the valve port (22).

2. The diaphragm pump according to claim 1, characterized in that, The leak-proof diaphragm (40) is assembled and positioned with the leak-proof valve cover (20) in a concave-convex fit.

3. The diaphragm pump according to claim 2, characterized in that, The leak-proof valve cover (20) protrudes from the direction away from the one-way valve fixing seat (11) and forms an extension boss (24). The water inlet (21), the valve port (22) and the water outlet (23) are all provided through the extension boss (24). The leak-proof diaphragm (40) is fitted on the extension boss (24). The leak-proof valve cover (20) has a groove (25) on the periphery of the extension boss (24), and the groove (25) can engage with the leak-proof diaphragm (40).

4. The diaphragm pump according to claim 3, characterized in that, The inlet / outlet cover (30) has a limiting rib (35) formed on it. The limiting rib (35) is located on the periphery of the extension boss (24) and abuts against the leak-proof diaphragm (40) to limit it. It is used to press the leak-proof diaphragm (40) into the groove (25).

5. The diaphragm pump according to claim 3, characterized in that, The leak-proof diaphragm (40) has a foolproof part (41) formed thereon, and the foolproof part (41) engages with the groove (25).

6. The diaphragm pump according to claim 1, characterized in that, The water inlet pipe (31) is connected to the water inlet (21) and forms a water inlet channel (110). The inlet / outlet cover (30) and / or the leak-proof valve cover (20) are provided with a first sealing baffle (111) around the water inlet channel (110), and the first sealing baffle (111) abuts against the leak-proof diaphragm (40) for sealing.

7. The diaphragm pump according to claim 1 or 6, characterized in that, The water outlet pipe (33) is connected to the water outlet (23) and forms a water outlet channel (120). The inlet / outlet cover (30) and / or the leak-proof valve cover (20) are provided with a second sealing rib (121) around the water outlet channel (120), and the second sealing rib (121) abuts and seals with the leak-proof diaphragm (40).

8. The diaphragm pump according to claim 1, characterized in that, The diaphragm pump body (10) also includes a main diaphragm (12), which abuts and seals against the one-way valve fixing seat (11); Five compression chambers (1201) are formed on the main diaphragm (12), and an inlet one-way valve is installed at the location of each compression chamber (1201); and an outlet one-way valve (17) is installed at the center position between the five compression chambers (1201) of the one-way valve fixing seat (11).

9. The diaphragm pump according to claim 8, characterized in that, The outlet one-way valve (17) has a valve disc (171), which is disposed on the one-way valve fixing seat (11) at one end facing the leak-proof valve cover (20) and abuts against the one-way valve fixing seat (11) to seal. The leak-proof valve cover (20) has a pressing protrusion (26) formed thereon, which abuts against and limits the valve disc (171).

10. A water purification device, characterized in that, The diaphragm pump (100) includes any one of claims 1 to 9.

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