A pulsation-reducing diaphragm pump structure
By using a buffer diaphragm to cover the suction and discharge chambers in the diaphragm pump, and combining it with the clamping design of the top cover and valve plate, the pulsation problem of the diaphragm pump is solved, achieving a compact structure and reduced noise and vibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KAMOER FLUILD TECH SHANGHAI CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-16
AI Technical Summary
Existing diaphragm pumps generate noise, vibration, and additional energy loss due to flow and pressure pulsations caused by the periodic reciprocating motion of the diaphragm. At the same time, the multi-buffered structure increases the size and cost of the pump.
A buffer diaphragm covers the intake and exhaust chambers and is held in place by the top cover and valve plate. Combined with the design of the partition plate and support plate, it provides cushioning and sealing, reducing pulsation.
It effectively reduces the flow and pressure pulsation of diaphragm pumps, reduces noise and vibration, has a compact structure, reduces costs, and simplifies assembly steps.
Smart Images
Figure CN224364067U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of diaphragm pumps, and in particular to a diaphragm pump structure that reduces pulsation. Background Technology
[0002] A diaphragm pump uses a drive mechanism to drive the diaphragm in reciprocating motion, changing the pump chamber volume to create negative pressure to draw in the fluid medium, and then using positive pressure to discharge the fluid medium. In the field of diaphragm pumps, due to the periodic reciprocating motion of the diaphragm, the fluid intake and discharge are also periodic, resulting in flow and pressure pulsations. These pulsations can easily lead to wear on components of the transmission system, generate noise and vibration, and cause additional energy loss. Higher pressure pulsations can also produce small bubbles or foam, affecting the transmission medium.
[0003] The diaphragm pump in the related technology includes an upper valve plate, a lower valve plate, a pump body, and a drive mechanism. The upper valve plate is connected to the lower valve plate, the lower valve plate is connected to the pump body, and the drive mechanism is connected to the pump body. The upper valve plate has an intake chamber and an exhaust chamber inside, which are connected. When the drive mechanism is activated, the fluid medium enters the intake chamber, and then the fluid medium in the intake chamber enters the exhaust chamber. The fluid medium in the exhaust chamber is discharged from the outlet, thus realizing the transportation of the fluid medium. In related technologies, in order to reduce the pulsation of the diaphragm pump, a dual-head pump or a multi-head pump is generally used to work alternately, or a pulsation damper is installed. However, this often greatly increases the volume space occupied by the diaphragm pump.
[0004] In some related technologies, a buffer structure is set in the suction chamber and another buffer structure is set in the discharge chamber. Multiple buffer structures will occupy a certain volume, making the diaphragm pump structure less compact. Setting multiple buffer structures will also increase costs and lead to more operation steps in assembling the diaphragm pump structure. Utility Model Content
[0005] In order to make the diaphragm pump structure more compact and reduce the pulsation of the diaphragm pump, this application provides a diaphragm pump structure with reduced pulsation.
[0006] This application provides a diaphragm pump structure with reduced pulsation, employing the following technical solution:
[0007] A diaphragm pump structure with reduced pulsation includes:
[0008] A pump chamber housing, wherein an intake chamber and an exhaust chamber are provided inside the pump chamber housing, and the intake chamber and the exhaust chamber are connected.
[0009] Pump body, the pump body and the pump chamber housing are connected;
[0010] A drive mechanism connected to the pump body, the drive mechanism being used to drive the fluid medium from the suction chamber into the discharge chamber;
[0011] A buffer diaphragm covers the inhalation chamber and the discharge chamber, and the buffer diaphragm provides buffering for the fluid medium in the inhalation chamber and the fluid medium in the discharge chamber.
[0012] By adopting the above technical solution, the drive mechanism can drive the fluid medium into the suction chamber and flow into the discharge chamber, realizing fluid medium transportation. The buffer diaphragm can buffer the fluid medium in the suction and discharge chambers, reducing pressure pulsation of the diaphragm pump and reducing noise and vibration of the transmission system components. Furthermore, one buffer diaphragm of this application can cover both the suction and discharge chambers respectively, that is, one buffer diaphragm can buffer both the suction and discharge chambers, which can make the structure more compact, reduce the cost of the diaphragm pump, and reduce the number of operation steps when assembling the diaphragm pump.
[0013] Optionally, the pump chamber housing includes an upper cover and a valve upper plate, the upper cover and the valve upper plate being detachably connected, and the upper cover and the valve upper plate clamping the buffer diaphragm.
[0014] By adopting the above technical solution, the upper cover and the upper valve plate clamp the buffer diaphragm, which helps the buffer diaphragm to buffer the fluid medium in the suction chamber and the discharge chamber respectively. The upper cover and the upper valve plate are detachably connected, which facilitates the installation and removal of the buffer diaphragm.
[0015] Optionally, the upper valve plate is connected to a sealing protrusion ring, which presses against the edge of the buffer diaphragm when the upper cover and the upper valve plate clamp the buffer diaphragm.
[0016] By adopting the above technical solution, when the upper cover and valve upper plate clamp the buffer diaphragm, the sealing convex ring squeezes the edge of the buffer diaphragm, which can ensure the sealing of the buffer diaphragm during installation and improve the working stability of the buffer diaphragm.
[0017] Optionally, the upper plate of the valve has a liquid receiving cavity, and a partition plate is connected inside the liquid receiving cavity. The partition plate divides the liquid receiving cavity into the suction cavity and the discharge cavity, and the partition plate abuts against the buffer diaphragm.
[0018] By adopting the above technical solution, the liquid receiving chamber is divided into an intake chamber and an exhaust chamber using a partition plate, thus achieving the division of different functional chambers. The partition plate abuts against the buffer diaphragm, which supports the buffer diaphragm and helps it buffer the fluid medium in the intake and exhaust chambers.
[0019] Optionally, the upper cover is connected to a support plate, the support plate abuts against the buffer membrane, and the support plate and the partition plate clamp the buffer membrane.
[0020] By adopting the above technical solution, the support plate and the partition plate clamp the buffer diaphragm, which can provide support force to the middle of the buffer diaphragm, so that the buffer diaphragm can provide buffering for the fluid medium in the suction chamber and the discharge chamber respectively.
[0021] Optionally, the partition plate is connected with a sealing protrusion, and when the support plate and the partition plate clamp the buffer diaphragm, the sealing protrusion squeezes the middle of the buffer diaphragm.
[0022] By adopting the above technical solution, when the support plate and the partition plate clamp the middle part of the buffer diaphragm, the sealing convex strip squeezes the middle part of the buffer diaphragm, which can further enhance the sealing performance of the middle part of the buffer diaphragm, improve the buffering effect on the fluid medium, and enhance the sealing performance between the suction chamber and the discharge chamber.
[0023] Optionally, the upper cover is provided with a damping chamber, and an elastic element is provided in the damping chamber, the elastic element abutting against the buffer diaphragm.
[0024] By adopting the above technical solution, the elastic element can provide buffering for the buffer diaphragm. In conjunction with the buffer diaphragm, the fluid medium in the suction chamber and discharge chamber is buffered, which can further reduce fluid pressure pulsation when the diaphragm pump is working and reduce noise and vibration of the transmission system components.
[0025] Optionally, the upper cover has small air holes that connect the damping chamber to the outside.
[0026] By adopting the above technical solution, if the small vent is not provided, the movement of the buffer diaphragm will cause a small amount of gas in the damping chamber to escape from the installation gap, resulting in the buffer diaphragm being sucked in and becoming concave in the middle, thus affecting the buffer performance. The small vent connects the damping chamber to the outside, ensuring that the buffer diaphragm will not be sucked in and concave. Furthermore, when the buffer diaphragm moves, it allows gas inside the damping chamber to be discharged to the outside through the small vent, or allows gas from the outside to enter the damping chamber through the small vent, thereby slowing down the movement of the buffer diaphragm and helping to reduce pulsation.
[0027] Optionally, the pump chamber housing further includes a lower valve plate, which is detachably connected to the upper valve plate; the drive mechanism includes a valve disc, which is clamped by the upper valve plate and the lower valve plate, and the valve disc allows the fluid medium in the suction chamber to flow into the discharge chamber.
[0028] By adopting the above technical solution, the upper and lower valve plates clamp the valve disc, and the upper and lower valve plates are detachably connected, which facilitates the installation and removal of the valve disc.
[0029] Optionally, the lower valve plate is connected to a clamping protrusion ring, which squeezes the edge of the valve plate when the upper valve plate and the lower valve plate clamp the valve disc.
[0030] By adopting the above technical solution, when the upper and lower valve plates clamp the valve plate, the clamping ring squeezes the edge of the valve plate, which enhances the installation stability of the valve plate and facilitates the flow of fluid medium from the suction chamber to the discharge chamber.
[0031] In summary, this application includes at least one of the following beneficial effects:
[0032] 1. The buffer diaphragm covers the suction chamber and the discharge chamber, which can provide buffering for the fluid medium flowing into the suction chamber and the discharge chamber, effectively reducing the flow and pressure pulsation generated during the operation of the diaphragm pump, and reducing noise and vibration;
[0033] 2. The top cover and valve plate are detachably connected and clamp the edge of the buffer diaphragm, which facilitates the installation and removal of the buffer diaphragm and makes it easier for later maintenance and replacement;
[0034] 3. The partition plate and the support plate clamp the middle of the buffer diaphragm, and the partition plate is connected to a sealing protrusion that squeezes the middle of the buffer diaphragm, which can improve the stability and sealing of the buffer diaphragm. Attached Figure Description
[0035] Figure 1 This is a schematic diagram of the overall structure of the diaphragm pump structure for reducing pulsation according to an embodiment of this application;
[0036] Figure 2 This is a cross-sectional schematic diagram of the diaphragm pump structure for reducing pulsation according to an embodiment of this application;
[0037] Figure 3 This is an exploded structural diagram of the upper cover, buffer diaphragm, upper valve plate, valve plate and lower valve plate of the present application embodiment;
[0038] Figure 4 This is a schematic diagram of the structure of the valve upper plate and the partition plate in an embodiment of this application.
[0039] Explanation of reference numerals in the attached drawings: 1. Pump chamber housing; 11. Upper valve plate; 111. Suction chamber; 112. Discharge chamber; 12. Lower valve plate; 13. Top cover; 131. Damping chamber; 132. Small vent; 14. Divider plate; 15. Support plate; 16. Sealing ring; 17. Sealing strip; 2. Buffer diaphragm; 3. Elastic element; 4. Pump body; 41. Support shell; 42. End plate; 5. Drive mechanism; 51. Motor; 52. Eccentric wheel; 53. Connecting rod; 54. Diaphragm; 541. Diaphragm cavity; 55. Valve plate; 56. Clamping ring; 57. First bearing; 58. Second bearing; 6. Inlet pipe; 7. Outlet pipe. Detailed Implementation
[0040] The following combination Figures 1 to 4 This application will be described in further detail.
[0041] This application provides a diaphragm pump structure that reduces pulsation.
[0042] refer to Figure 1 and Figure 2 A diaphragm pump structure with reduced pulsation includes a pump housing 1, a pump body 4, a drive mechanism 5, an inlet pipe 6, and an outlet pipe 7. The pump body 4 includes a support shell 41 and an end plate 42, which are detachably connected by bolts.
[0043] refer to Figure 2 and Figure 3 The drive mechanism 5 includes a motor 51, an eccentric wheel 52, a connecting rod 53, a diaphragm 54, a valve plate 55, a first bearing 57, and a second bearing 58. The motor 51 is fixedly connected to the support housing 41, and the second bearing 58 is connected to the end plate 42. The output shaft of the motor 51 passes through the second bearing 58. The eccentric wheel 52 is sleeved on the output shaft of the motor 51 and is located inside the support housing 41. The first bearing 57 is sleeved on the outside of the eccentric wheel 52. The connecting rod 53 is sleeved on the outside of the first bearing 57, and the diaphragm 54 is fixedly connected to the connecting rod 53.
[0044] refer to Figure 2 and Figure 3 The pump housing 1 includes an upper valve plate 11, a lower valve plate 12, and an upper cover 13. The lower valve plate 12 is detachably connected to the support shell 41, and the lower valve plate 12 and the support shell 41 clamp the edge of the diaphragm 54. When the motor 51 is started, the motor 51 can drive the diaphragm 54 to reciprocate through the eccentric wheel 52 and the connecting rod 53.
[0045] refer to Figure 2 and Figure 3 The upper valve plate 11 and the lower valve plate 12 are detachably connected, and the valve plate 55 is clamped between the upper valve plate 11 and the lower valve plate 12. The lower valve plate 12 is integrally formed with a clamping protrusion 56, which squeezes the edge of the valve plate 55, thereby improving the installation stability of the valve plate 55. A diaphragm cavity 541 is formed between the upper valve plate 11, the lower valve plate 12 and the diaphragm plate 54, and the valve plate 55 is located in the diaphragm cavity 541.
[0046] refer to Figure 2 and Figure 3The upper valve plate 11 has a liquid receiving chamber inside, and a partition plate 14 is fixedly connected inside the liquid receiving chamber, dividing the liquid receiving chamber into a suction chamber 111 and a discharge chamber 112. The inlet pipe 6 communicates with the suction chamber 111, the suction chamber 111 communicates with the diaphragm chamber 541, the diaphragm chamber 541 communicates with the discharge chamber 112, and the outlet pipe 7 communicates with the discharge chamber 112. The valve plate 55 allows the fluid medium to enter the diaphragm chamber 541 unidirectionally from the suction chamber 111, and also allows the fluid medium to enter the discharge chamber 112 unidirectionally from the diaphragm chamber 541. When the motor 51 drives the diaphragm plate 54 to reciprocate, the fluid medium can sequentially enter the suction chamber 111, the diaphragm chamber 541, the discharge chamber 112, and the outlet pipe 7 from the inlet pipe 6, thus realizing the transportation of the fluid medium.
[0047] refer to Figure 3 and Figure 4 The pump housing 1 also includes a support plate 15, a sealing ring 16, and a sealing strip 17. The upper cover 13 is detachably connected to the upper valve plate 11, and a buffer diaphragm 2 is sandwiched between the upper cover 13 and the upper valve plate 11. The buffer diaphragm 2 covers the suction chamber 111 and the discharge chamber 112, thereby providing buffering for the fluid medium in the suction chamber 111 and the discharge chamber 112, respectively. The upper valve plate 11 and the sealing ring 16 are integrally formed, and the sealing ring 16 presses against the edge of the buffer diaphragm 2, improving the stability of the buffer diaphragm 2 after installation. The support plate 15 is fixedly connected to the upper cover 13, and a damping chamber 131 is provided inside the upper cover 13. The support plate 15 is located inside the damping chamber 131, and a partition plate 14 and the support plate 15 sandwich the middle part of the buffer diaphragm 2. The top of the partition plate 14 is integrally formed with the sealing protrusion 17. The sealing protrusion 17 squeezes the middle of the buffer diaphragm 2, thereby improving the sealing between the suction chamber 111, the discharge chamber 112 and the buffer diaphragm 2.
[0048] refer to Figure 2 and Figure 3 An elastic element 3 is installed inside the damping chamber 131. In this embodiment, the elastic element 3 is specifically PU cotton. In other embodiments of this embodiment, the elastic element 3 can also be a spring. The elastic element 3 abuts against the buffer diaphragm 2, and the elastic element 3 can provide cushioning to the buffer diaphragm 2.
[0049] refer to Figure 2 and Figure 3 A small vent 132 is provided on the top side of the damping chamber 131, connecting the damping chamber 131 to the outside. Without the vent 132, movement of the buffer diaphragm 2 would cause a small amount of gas to escape from the installation gap within the damping chamber 131, resulting in the buffer diaphragm 2 being sucked in and its center becoming concave. The vent 132, by connecting the damping chamber 131 to the outside, ensures that the buffer diaphragm 2 will not be sucked in or concave.
[0050] The implementation principle of the diaphragm pump structure for reducing pulsation in this application embodiment is as follows: The motor 51 is started, and the motor 51 drives the diaphragm 54 to reciprocate, causing the fluid medium to sequentially enter the suction chamber 111, diaphragm chamber 541, discharge chamber 112, and discharge pipe 7 from the inlet pipe 6, thereby realizing the transportation of the fluid medium. The buffer diaphragm 2 can provide buffering for the fluid medium in the suction chamber 111 and discharge chamber 112 respectively, and the elastic element 3 provides buffering for the buffer diaphragm 2, thereby reducing the pulsation of the fluid medium.
[0051] 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 diaphragm pump structure for reducing pulsation, characterized in that, include: Pump chamber housing (1), wherein a suction chamber (111) and a discharge chamber (112) are provided inside the pump chamber housing (1), and the suction chamber (111) and the discharge chamber (112) are connected; Pump body (4), the pump body (4) and the pump chamber housing (1) are connected; A drive mechanism (5) is connected to the pump body (4) and is used to drive the fluid medium from the suction chamber (111) into the discharge chamber (112). A buffer diaphragm (2) covers the inhalation chamber (111) and the discharge chamber (112), and the buffer diaphragm (2) provides buffering for the fluid medium in the inhalation chamber (111) and the fluid medium in the discharge chamber (112).
2. The diaphragm pump structure for reducing pulsation according to claim 1, characterized in that, The pump chamber housing (1) includes an upper cover (13) and a valve upper plate (11), the upper cover (13) and the valve upper plate (11) are detachably connected, and the upper cover (13) and the valve upper plate (11) clamp the buffer diaphragm (2).
3. The diaphragm pump structure for reducing pulsation according to claim 2, characterized in that, The valve upper plate (11) is connected to a sealing protrusion ring (16). When the upper cover (13) and the valve upper plate (11) clamp the buffer diaphragm (2), the sealing protrusion ring (16) squeezes the edge of the buffer diaphragm (2).
4. The diaphragm pump structure for reducing pulsation according to claim 2, characterized in that, The upper plate (11) of the valve has a liquid receiving cavity, and a partition plate (14) is connected inside the liquid receiving cavity. The partition plate (14) divides the liquid receiving cavity into the suction cavity (111) and the discharge cavity (112). The partition plate (14) abuts against the buffer diaphragm (2).
5. The diaphragm pump structure for reducing pulsation according to claim 4, characterized in that, The top cover (13) is connected to a support plate (15), the support plate (15) abuts against the buffer diaphragm (2), and the support plate (15) and the partition plate (14) clamp the buffer diaphragm (2).
6. The diaphragm pump structure for reducing pulsation according to claim 5, characterized in that, The partition plate (14) is connected to a sealing protrusion (17). When the support plate (15) and the partition plate (14) clamp the buffer diaphragm (2), the sealing protrusion (17) squeezes the middle of the buffer diaphragm (2).
7. The diaphragm pump structure for reducing pulsation according to claim 2, characterized in that, The upper cover (13) is provided with a damping chamber (131), and an elastic element (3) is provided in the damping chamber (131). The elastic element (3) abuts against the buffer diaphragm (2).
8. The diaphragm pump structure for reducing pulsation according to claim 7, characterized in that, The upper cover (13) has a small air hole (132) that connects the damping chamber (131) to the outside.
9. The diaphragm pump structure for reducing pulsation according to claim 2, characterized in that, The pump chamber housing (1) further includes a lower valve plate (12), which is detachably connected to the upper valve plate (11); the drive mechanism (5) includes a valve plate (55), which is held by the upper valve plate (11) and the lower valve plate (12), and the valve plate (55) allows the fluid medium in the suction chamber (111) to flow into the discharge chamber (112).
10. A diaphragm pump structure for reducing pulsation according to claim 9, characterized in that, The lower valve plate (12) is connected to a clamping protrusion (56). When the upper valve plate (11) and the lower valve plate (12) clamp the valve plate (55), the clamping protrusion (56) squeezes the edge of the valve plate (55).