Fluid chamber structure for diaphragm pump

Abstract

The utility model relates to a kind of fluid chamber structure for diaphragm pump, including fluid chamber body, and the reverse structure of being set to the fluid chamber body inside, wherein, the fluid chamber body has: water inlet;Water outlet;Buffer cavity is communicated with the high-pressure chamber and water outlet of diaphragm pump respectively;High-pressure water outlet hole is used to connect the high-pressure chamber and buffer cavity of diaphragm pump;The reverse structure has: reverse valve seat, in buffer cavity;Reverse valve is movably cooperated on reverse valve seat, and it can be moved between first position and second position relative to reverse valve seat;When the first position, the reverse valve closes high-pressure water outlet hole;When the second position, the reverse valve is separated from the contact of high-pressure water outlet hole, and the high-pressure chamber of the diaphragm pump is communicated with buffer cavity by high-pressure water outlet hole.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and in particular to a fluid chamber structure for a diaphragm pump. Background Technology

[0002] Currently, diaphragm pumps are mainly used in reverse osmosis systems or other systems that require pressurization. Generally, when a pressurization system reaches a certain pressure, the diaphragm pump needs to be powered off, and the system pressure needs to be maintained within a certain range. When restarting, the pressure is released (e.g., the outlet valve is opened), and the diaphragm pump restarts pressurization.

[0003] Currently, in order to ensure system pressure, the industry often needs to add a one-way check valve to the system. This one-way check valve is separate from the diaphragm pump, which makes the system layout more complicated. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems by providing a fluid chamber structure for a diaphragm pump.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A fluid chamber structure for a diaphragm pump includes a fluid chamber body and a check valve structure disposed within the fluid chamber body, wherein...

[0007] The fluid chamber body has:

[0008] Inlet;

[0009] Water outlet;

[0010] The buffer chamber is connected to the high-pressure chamber and the outlet of the diaphragm pump, respectively.

[0011] The high-pressure outlet is used to connect the high-pressure chamber and the buffer chamber of the diaphragm pump;

[0012] The anti-reverse structure has:

[0013] The check valve seat is located inside the buffer chamber;

[0014] The check valve is movably fitted onto the check valve seat and can move relative to the check valve seat between a first position and a second position.

[0015] In the first position, the check valve closes the high-pressure water outlet; in the second position, the check valve disengages from the high-pressure water outlet, and the high-pressure chamber of the diaphragm pump is connected to the buffer chamber through the high-pressure water outlet.

[0016] Preferably, the second position is axially offset from the first position according to the flow direction of fluid from the high-pressure chamber to the buffer chamber of the diaphragm pump.

[0017] Preferably, the anti-reverse structure further comprises:

[0018] The elastic element is sleeved on the check valve seat, and its two ends abut against the check valve seat and the check valve, respectively.

[0019] In the second position, the elastic element elastically pushes the check valve toward the first position.

[0020] Preferably, the check valve seat has:

[0021] seat body;

[0022] A guide hole is formed on the seat body and works with the check valve to achieve guidance.

[0023] Preferably, the check valve has:

[0024] Valve body;

[0025] A guide post is formed at one end of the valve body and embedded in the guide hole to guide the movement of the check valve between the first position and the second position.

[0026] An annular groove is formed on the side wall of the valve body at the end furthest from the guide post.

[0027] A sealing ring is disposed within the annular groove;

[0028] When in the first position, the sealing ring contacts the side wall of the high-pressure water outlet, thereby sealing the high-pressure water outlet.

[0029] Preferably, the check valve seat further comprises:

[0030] An annular flange is formed on the base.

[0031] The check valve seat is fixedly supported on the fluid chamber body by the annular flange.

[0032] Preferably, the fluid chamber structure further includes:

[0033] Top cover, installed on the fluid chamber body;

[0034] The end face of the top cover presses the annular flange against the fluid chamber body, thereby fixing the check valve seat in the buffer cavity.

[0035] Preferably, the fluid chamber structure further includes:

[0036] A sealing gasket is placed between the top cover and the check valve seat;

[0037] The end face of the top cover presses the annular flange against the fluid chamber body via a sealing gasket.

[0038] Preferably, the end face of the top cover presses the edge of the sealing gasket against the fluid chamber body.

[0039] Preferably, the high-pressure water outlet has a check slope facing the check structure, and in the first position, the check valve presses against the check slope to close the high-pressure water outlet.

[0040] The beneficial effects of this utility model are as follows:

[0041] 1. This utility model provides a buffer chamber on the fluid chamber body that is connected to the high-pressure chamber and the water outlet respectively, and a backflow prevention structure is provided in the buffer chamber. After the system is powered off and no pressure is increased, the backflow prevention structure will seal the high-pressure water outlet, and the water in the buffer chamber and the water outlet will not flow back to the high-pressure chamber, thus playing the role of backflow prevention and pressure maintenance.

[0042] 2. Integrating the check valve structure into the diaphragm pump can reduce the number of check valves in the system, reduce the complexity of the system, and help reduce system costs. Attached Figure Description

[0043] Figure 1 This is an exploded view of the present invention.

[0044] Figure 2 This is a cross-sectional view of the fluid chamber body of this utility model.

[0045] Figure 3 This is a schematic diagram of the structure of the check valve seat of this utility model.

[0046] Figure 4 This is a schematic diagram of the check valve of this utility model.

[0047] Figure 5 This is a schematic diagram of the structure of the top cover of this utility model.

[0048] Figure 6 Cross-sectional view of the diaphragm pump of this utility model Figure 1 .

[0049] Figure 7 Cross-sectional view of the diaphragm pump of this utility model Figure 2 .

[0050] The markings in the image are as follows:

[0051] Fluid chamber body 100; inlet 101; outlet 102; buffer chamber 103; high-pressure outlet 104; check slope 1041; first limiting step 105; second limiting step 106; annular rib 107;

[0052] Check valve structure 200; Check valve seat 201; Seat body 2011; Guide hole 2012; Annular flange 2013; Limiting end face 2014; Check valve 202; Valve body 2021; Guide post 2022; Annular groove 2023; Sealing ring 2024; First flange 2025; Second flange 2026; Mating inclined surface 2027; Limiting surface 2028; Elastic element 203;

[0053] Top cover 300; rib 301;

[0054] Sealing gasket 400;

[0055] Diaphragm chamber 500; Intake valve 501; Discharge valve 502;

[0056] 600 diaphragm;

[0057] Low-pressure chamber 700;

[0058] High-pressure chamber 800;

[0059] Pressure chamber 900. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are exemplary embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0061] This embodiment provides a fluid chamber structure for a diaphragm pump, including a fluid chamber body 100 and a check valve structure 200 disposed within the fluid chamber body 100;

[0062] The fluid chamber body 100 has: an inlet 101; an outlet 102; a buffer chamber 103 that is connected to the high-pressure chamber of the diaphragm pump and the outlet 102 respectively; and a high-pressure outlet hole 104 for connecting the high-pressure chamber of the diaphragm pump and the buffer chamber 103.

[0063] The check valve structure 200 includes: a check valve seat 201 located in the buffer chamber 103; and a check valve 202 that is movably fitted onto the check valve seat 201 and can move relative to the check valve seat 201 between a first position and a second position.

[0064] In the first position, the check valve 202 closes the high-pressure outlet 104; in the second position, the check valve 202 disengages from the high-pressure outlet 104, and the high-pressure chamber of the diaphragm pump is connected to the buffer chamber 103 through the high-pressure outlet 104.

[0065] Thus, when outlet 102 is closed, the system cuts off power to the diaphragm pump, and the diaphragm pump no longer pressurizes. Check valve 202 moves to the first position, closing the high-pressure outlet 104, preventing water from flowing back into the high-pressure chamber from the buffer chamber 103 and outlet 102, thus achieving backflow prevention and pressure maintenance. Furthermore, integrating the check valve 200 onto the diaphragm pump reduces the number of one-way valves in the system, lowers system complexity, and helps reduce system costs.

[0066] The technical solution of this embodiment will be described in detail below with reference to the accompanying drawings.

[0067] like Figure 1 The example fluid chamber structure for a diaphragm pump includes a fluid chamber body 100 and a check valve 200 disposed within the fluid chamber body 100.

[0068] like Figure 2 As shown, the fluid chamber body 100 has:

[0069] Inlet 101 serves as the inlet of the diaphragm pump and is connected to the low-pressure chamber of the diaphragm pump. It is a conventional or existing technology in the field of diaphragm pump technology and will not be described in detail.

[0070] The outlet 102 serves as the outlet of the diaphragm pump and is used to connect to external water-using equipment. It is a conventional or existing technology in the field of diaphragm pump technology and will not be described in detail.

[0071] The buffer chamber 103 is connected to the high-pressure chamber and the outlet 102 of the diaphragm pump, respectively.

[0072] The high-pressure outlet 104 is used to connect the high-pressure chamber and the buffer chamber 103 of the diaphragm pump. The fluid in the high-pressure chamber of the diaphragm pump enters the buffer chamber 103 after passing through the high-pressure outlet 104. After being buffered by the buffer chamber 103, the fluid is discharged through the outlet 102.

[0073] In some practical applications, the fluid chamber body 100 has an opening at one end opposite to the high-pressure water outlet 104 (i.e., the buffer chamber is open at both ends), and a first limiting step 105 and a second limiting step 106 are respectively provided, wherein the second limiting step 106 is higher than the first limiting step 105. In other practical applications, a ring-shaped rib 107 is provided on the second limiting step 106 near the first limiting step 105.

[0074] In other practical applications, the high-pressure water outlet 104 has a check slope 1041 facing the check structure 200.

[0075] like Figure 6 , Figure 7 As shown, the anti-reverse structure 200 has:

[0076] The check valve seat 201 is located inside the buffer chamber 103;

[0077] Check valve 202 is movably fitted onto check valve seat 201 and can move relative to check valve seat 201 between a first position and a second position;

[0078] The elastic element 203 is sleeved on the check valve seat 201, and its two ends abut against the check valve seat 201 and the check valve 202 respectively.

[0079] In the first position, the check valve 202 closes the high-pressure outlet 104, for example, the check valve 202 presses against the check slope 1041 to close the high-pressure outlet 104; in the second position, the check valve 202 disengages from the high-pressure outlet 104, the high-pressure chamber of the diaphragm pump is connected to the buffer chamber 103 through the high-pressure outlet 104, and the elastic element 203 elastically pushes the check valve 202 toward the first position; the second position is axially deviated from the first position according to the flow direction of fluid from the high-pressure chamber of the diaphragm pump to the buffer chamber 103.

[0080] like Figure 3 As shown, in some practical applications, the check valve seat 201 has:

[0081] pedestal 2011;

[0082] A guide hole 2012 is formed on the seat 2011 and cooperates with the check valve 202 to achieve guidance;

[0083] An annular flange 2013 is formed on the base 2011;

[0084] The check valve seat 201 is fixedly supported on the fluid chamber body 100 by the annular flange 2013. Specifically, the annular flange 2013 is supported on the first limiting step 105, so that the check valve seat 201 is located in the buffer chamber 103; the sealing gasket 400 is placed above the check valve seat 201, the upper surface of the annular flange 2013 is in contact with the sealing gasket 400, and the edge of the sealing gasket 400 is in contact with the second limiting step 106; the top cover 300 is detachably installed on the fluid chamber body 100, and the end face of the top cover 300 presses the annular flange 2013 against the first limiting step 105 through the sealing gasket 400, while the end face of the top cover 300 presses the edge of the sealing gasket 400 against the second limiting step 106. Figure 5 As shown, in some other practical applications, a ring of pressure ribs 301 is formed on the end face of the top cover 300. In the assembled state, the pressure ribs 301 are located on the outer ring of the annular ribs 107. The pressure ribs 301, the annular ribs 107 and the sealing gasket 400 are engaged to achieve double-rib sealing.

[0085] In some practical applications, the check valve seat 201 has a limiting end face 2014 located on the outer ring of the guide hole 2012.

[0086] like Figure 4 As shown, in some practical applications, the check valve 202 has the following characteristics:

[0087] Valve body 2021;

[0088] A guide post 2022 is formed at one end of the valve body 2021 and is embedded in the guide hole 2012 to guide the movement of the check valve 202 between the first position and the second position. In this embodiment, the guide post 2022 and the guide hole 2012 are clearance fit to facilitate relative movement between the two.

[0089] An annular groove 2023 is formed on the side wall of the valve body 2021 at one end away from the guide post 2022;

[0090] A sealing ring 2024 is disposed within the annular groove 2023;

[0091] When in the first position, the sealing ring 2024 contacts the side wall of the high-pressure water outlet 104 (for example, the sealing ring 2024 is pressed against the anti-reverse slope 1041), thereby sealing the high-pressure water outlet 104.

[0092] In some practical applications, a first flange 2025 and a second flange 2026 are respectively formed on the valve body 2021, and the annular groove 2023 is formed between the first flange 2025 and the second flange 2026. A mating inclined surface 2027 adapted to the check slope 1041 is formed on the first flange 2025; a limiting surface 2028 mating with the limiting end face 2014 is also formed on the valve body 2021. Figure 6 , Figure 7 In the assembled state shown, one end of the elastic element 203 abuts against the check valve seat 201, and the other end abuts against the upper surface of the second flange 2026. For example... Figure 6 As shown, when the check valve 202 is in the second position, the limiting end face 2014 abuts against the limiting surface 2028 and is limited; when the check valve 202 is in the first position, the limiting end face 2014 separates from the limiting surface 2028, and the check valve 202 closes the high pressure outlet hole 104.

[0093] like Figure 6 , Figure 7An example of a diaphragm pump is an application of the aforementioned fluid chamber structure, including the aforementioned fluid chamber structure, diaphragm chamber 500, diaphragm 600, and support (not shown in the figure). The diaphragm chamber 500 and diaphragm 600 are installed in the cavity formed by the aforementioned fluid chamber structure and support. A low-pressure chamber 700 and a high-pressure chamber 800 are formed between the fluid chamber structure and the diaphragm chamber 500, and a booster chamber 900 is formed between the diaphragm chamber 500 and the diaphragm 600. An intake valve 501 and an exhaust valve 502 are respectively installed on the diaphragm chamber 500.

[0094] The following is an exemplary description of one working process of the diaphragm pump in this embodiment.

[0095] The motor (not shown in the diagram) operates, causing the diaphragm 600 to move downwards. This increases the volume of the pressurization chamber 900, lowers the pressure, and causes the suction valve 501 to deform. Fluid entering the low-pressure chamber 700 through the inlet 101 then enters the pressurization chamber 900. The motor (not shown in the diagram) then operates, causing the diaphragm 600 to move upwards. This decreases the volume of the pressurization chamber 900, increases the pressure, and causes the discharge valve 502 to deform. Fluid entering the pressurization chamber 900 enters the high-pressure chamber 800, completing the pressurization process. Under the influence of the fluid in the high-pressure chamber 800, and guided by the cooperation of the guide post 2022 and the guide hole 2012, the check valve 202 overcomes the force of the elastic element 203 and moves upwards until the limiting end face 2014 abuts against the limiting surface 2028. The check valve 202 then stops moving upwards and reaches the second position. The fluid enters the buffer chamber 103 through the high-pressure outlet hole 104 and then flows out through the outlet 102. When outlet 102 is closed, the diaphragm pump pressure increases. The system then cuts off power to the diaphragm pump, and it stops pressurizing. However, due to the downward pressure F of the fluid in buffer chamber 103... P The downward pressure F of the elastic element 203 causes the check valve 202 to move down to the first position, where the inclined surface 2027 fits against the check inclined surface 1041, and the sealing ring 2024 fits tightly against the check inclined surface 1041, sealing the high-pressure outlet 104. The fluid in the buffer chamber 103 and the outlet 102 will not flow back into the high-pressure chamber 800, thus playing the role of check valve and pressure maintenance.

[0096] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A fluid chamber structure for a diaphragm pump, characterized by, It includes a fluid chamber body (100) and a check valve structure (200) disposed within the fluid chamber body (100), wherein, The fluid chamber body (100) has: Inlet (101); Outlet (102); The buffer chamber (103) is connected to the high-pressure chamber and the outlet (102) of the diaphragm pump, respectively; The high-pressure outlet (104) is used to connect the high-pressure chamber and the buffer chamber (103) of the diaphragm pump. The anti-reverse structure (200) has: The check valve seat (201) is located inside the buffer chamber (103); The check valve (202) is movably fitted onto the check valve seat (201) and is movable relative to the check valve seat (201) between a first position and a second position; In the first position, the check valve (202) closes the high-pressure outlet (104); in the second position, the check valve (202) disengages from the high-pressure outlet (104), and the high-pressure chamber of the diaphragm pump is connected to the buffer chamber (103) through the high-pressure outlet (104).

2. The fluid chamber structure for a diaphragm pump according to claim 1, characterized by, The second position is axially offset from the first position according to the flow direction of fluid from the high-pressure chamber of the diaphragm pump to the buffer chamber (103).

3. The fluid chamber structure for a diaphragm pump according to claim 1, characterized in that, The anti-reverse structure (200) also has: The elastic element (203) is sleeved on the check valve seat (201), and its two ends abut against the check valve seat (201) and the check valve (202) respectively. In the second position, the elastic element (203) elastically pushes the check valve (202) toward the first position.

4. The fluid chamber structure for a diaphragm pump according to claim 1, characterized in that, The check valve seat (201) has: Seat Body (2011); A guide hole (2012) is formed on the seat (2011) and works with the check valve (202) to achieve guidance.

5. The fluid chamber structure for a diaphragm pump according to claim 4, characterized in that, The check valve (202) has the following features: Valve body (2021); A guide post (2022) is formed at one end of the valve body (2021) and is embedded in the guide hole (2012) to guide the movement of the check valve (202) between the first position and the second position; An annular groove (2023) is formed on the side wall of the valve body (2021) at one end away from the guide post (2022); A sealing ring (2024) is disposed within the annular groove (2023); When in the first position, the sealing ring (2024) contacts the side wall of the high-pressure water outlet (104) to seal the high-pressure water outlet (104).

6. The fluid chamber structure for a diaphragm pump according to claim 4, characterized in that, The check valve seat (201) also has: An annular flange (2013) is formed on the base (2011); The check valve seat (201) is fixedly supported on the fluid chamber body (100) by the annular flange (2013).

7. The fluid chamber structure for a diaphragm pump according to claim 6, characterized in that, The fluid chamber structure also includes: The top cover (300) is installed on the fluid chamber body (100); The end face of the top cover (300) presses the annular flange (2013) against the fluid chamber body (100) to fix the check valve seat (201) in the buffer cavity (103).

8. The fluid chamber structure for a diaphragm pump according to claim 7, characterized in that, The fluid chamber structure also includes: A sealing gasket (400) is placed between the top cover (300) and the check valve seat (201); The end face of the top cover (300) presses the annular flange (2013) against the fluid chamber body (100) via a sealing gasket (400).

9. The fluid chamber structure for a diaphragm pump according to claim 8, characterized in that, The end face of the top cover (300) presses the edge of the sealing gasket (400) against the fluid chamber body (100).

10. The fluid chamber structure for a diaphragm pump according to claim 1, characterized in that, The high-pressure water outlet (104) has a check slope (1041) facing the check structure (200). In the first position, the check valve (202) presses against the check slope (1041) to close the high-pressure water outlet (104).

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