Diaphragm pump

Abstract

The utility model relates to the technical field of diaphragm pumps, and provides a diaphragm pump and a pump head, and the pump head is provided with an air inlet and an air outlet; the valve plate comprises a mounting plate and a plurality of diaphragm plates; a plurality of first air inlet holes, a plurality of first air outlet holes, a plurality of first air inlet grooves and a mounting groove are formed in the mounting plate; the plurality of diaphragm sheets are arranged in the mounting groove at intervals; the valve seat is arranged at the lower end of the mounting plate, and the valve seat is provided with a plurality of second air inlet holes, a plurality of second air inlet grooves, a plurality of second air outlet holes and a plurality of air pumping holes; the piston comprises a seat body and a plurality of air bags, and the seat body is provided with a plurality of third air inlet holes and a plurality of third air outlet holes; the plurality of check valves are arranged on the valve seat through elasticity; the air cylinder seat is arranged at the lower end of the valve seat, and the air cylinder seat is provided with a plurality of fourth air inlet holes, a plurality of fourth air outlet holes and a flowing cavity. Therefore, the working noise of the diaphragm pump can be reduced.

Description

Technical Field

[0001] This application relates to the field of diaphragm pumps, and more particularly to a diaphragm pump. Background Technology

[0002] A diaphragm pump is a special type of pump that uses the reciprocating motion of a piston to change the volume of the working chamber, thereby drawing in and expelling gas. Devices such as blood pressure monitors and massage chairs utilize diaphragm pumps.

[0003] In related technologies, when a diaphragm pump is working, the drive mechanism drives the piston to move back and forth to change the volume of each air bladder of the piston, so that gas flows from the air inlet into the air bladder, and then the pressure difference is used to make the gas flow from the air bladder to the air outlet, so as to realize the operation of the diaphragm pump.

[0004] However, in practical applications, the short gas path causes the gas to flow at high speed in the diaphragm pump, resulting in relatively high noise levels during operation, thus requiring improvement. Utility Model Content

[0005] In order to reduce the noise of diaphragm pump operation, this application provides a diaphragm pump.

[0006] The diaphragm pump provided in this application adopts the following technical solution:

[0007] A diaphragm pump includes a pump head, the pump head being provided with an air inlet and an air outlet;

[0008] A valve plate, comprising a mounting plate and multiple diaphragms; the mounting plate is disposed at the lower end of the pump head, and the mounting plate is provided with multiple first air inlets, multiple first air outlets, multiple first air inlets, and a mounting groove; the multiple first air inlets are connected to the air inlet; the multiple first air outlets are connected to the multiple first air inlets; the mounting groove is connected to the air outlet, and the multiple diaphragms are spaced apart in the mounting groove;

[0009] A valve seat is disposed at the lower end of the mounting plate. The valve seat is provided with a plurality of second air inlets, a plurality of second air inlets, a plurality of second air outlets, and a plurality of pumping holes. Each second air inlet is connected to each first air inlet, each second air inlet is connected to each first air inlet, each second air outlet is connected to each first air outlet, and each pumping hole is connected to the mounting groove. Furthermore, each diaphragm sheet is elastically abutted against each pumping hole.

[0010] A piston, comprising a seat and multiple air bladders, wherein the seat is provided with multiple third air inlets and multiple third air outlets, each of the third air inlets being connected to each of the second air inlets and each of the third air outlets being connected to each of the second air outlets, and multiple air bladders being disposed on the seat, and each of the air bladders being connected to each of the second air inlets and each of the pumping air holes;

[0011] Multiple check valves are provided on the valve seat to block multiple second air inlets, so that each second air inlet is selectively connected to each airbag.

[0012] A cylinder seat is located at the lower end of the valve seat. The cylinder seat has multiple fourth air inlets, multiple fourth air outlets, and a flow chamber. Each of the fourth air inlets is connected to each of the third air inlets, each of the fourth air outlets is connected to each of the third air outlets, and each of the fourth air inlets and fourth air outlets is connected to the flow chamber. The multiple air bladders are engaged in the flow chamber.

[0013] By adopting the above technical solution, in practical applications, when the piston moves back and forth, the gas flows from the air inlet to the pump head, and then flows into the flow chamber through the first air inlet, the second air inlet, the third air inlet and the fourth air inlet in sequence.

[0014] Afterwards, the gas passes through the fourth outlet, the third outlet, the second outlet, and the first outlet in sequence. Since the first outlet is connected to the first inlet groove, the gas flows into the valve seat through the first inlet groove. Under the action of the pressure difference, the check valve undergoes elastic deformation, which connects the second inlet groove to the air bag, and the gas flows into the air bag.

[0015] At this time, under the action of air pressure difference, the diaphragm undergoes elastic deformation, causing the gas in the airbag to flow into the mounting groove and out through the air outlet to realize the operation of the air pump. In this process, the gas travel is effectively extended to reduce the gas flow rate, thereby reducing the noise of the diaphragm pump operation.

[0016] Preferably, the upper end of the mounting plate is provided with a snap-fit ​​connector, which snaps into the lower end of the pump head.

[0017] By adopting the above technical solution, and by setting a snap-fit ​​connector, which snaps into the pump head, the positioning and installation between the pump head and the valve plate can be achieved, thus ensuring the accuracy of the installation between the pump head and the valve plate.

[0018] Preferably, the upper end of the valve seat is provided with a snap-fit ​​block, which snaps into the snap-fit ​​connector.

[0019] By adopting the above technical solution, and by setting a snap-fit ​​block, which snaps into the snap-fit ​​connector, the positioning and installation between the valve plate and the valve seat can be achieved, thereby improving the accuracy of the installation between the valve plate and the valve seat.

[0020] Preferably, the mounting plate is provided with a positioning hole, and the upper end of the valve seat is provided with a positioning post, which is inserted into the positioning hole.

[0021] By adopting the above technical solution, positioning holes and positioning pins are set, with the positioning pins inserted into the positioning holes, so as to facilitate the positioning and installation between the valve plate and the valve seat.

[0022] Preferably, the lower end of the pump head is provided with multiple positioning grooves, and the upper end of the valve seat is provided with multiple positioning blocks, each positioning block being embedded in each positioning groove.

[0023] By adopting the above technical solution, and by setting multiple positioning slots and multiple positioning blocks, the positioning and installation between the pump head and the valve seat can be achieved.

[0024] Preferably, the upper end of the valve seat is provided with multiple mounting posts, and each check valve is elastically snapped into each of the mounting posts.

[0025] By adopting the above technical solution and setting multiple mounting columns, the check valve can be installed easily and its elastic deformation can be facilitated.

[0026] Preferably, the upper end of the cylinder seat is provided with a plurality of snap-fit ​​strips, each of which passes through the seat body and snaps into the lower end of the valve seat.

[0027] By adopting the above technical solution and setting multiple snap-fit ​​strips, the positioning and installation between the valve seat and the cylinder seat can be facilitated.

[0028] Preferably, the diaphragm pump further includes multiple snap-fits, and the pump head, the valve seat, and the cylinder seat are fixedly connected by the multiple snap-fits.

[0029] By adopting the above technical solution and setting multiple clips, it is possible to facilitate the assembly of the pump head, valve seat and cylinder seat.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. By extending the gas travel distance, the gas flow rate is reduced, thereby reducing the noise of the diaphragm pump operation;

[0032] 2. By setting a snap-fit ​​connector, which snaps into the pump head, the positioning and installation between the pump head and the valve plate can be achieved, thus ensuring the accuracy of the installation between the pump head and the valve plate;

[0033] 3. By setting multiple mounting posts, the check valve can be installed easily, and the elastic deformation of the check valve can be facilitated. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the diaphragm pump in the embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the diaphragm pump section in an embodiment of this application.

[0036] Reference numerals: 1. Pump head; 11. Air inlet; 12. Air outlet; 13. Positioning groove; 2. Valve plate; 21. Mounting plate; 211. First air inlet; 212. First air outlet; 213. First air inlet groove; 214. Mounting groove; 215. Snap-fit ​​connector; 216. Positioning hole; 22. Diaphragm; 3. Valve seat; 31. Second air inlet; 32. Second air inlet groove; 33. Second air outlet; 34. Pumping port; 35. Snap-fit ​​block; 36. Positioning post; 37. Positioning block; 38. Mounting post; 4. Piston; 41. Seat; 411. Third air inlet; 412. Third air outlet; 42. Air bladder; 5. Check valve; 6. Cylinder seat; 61. Fourth air inlet; 62. Fourth air outlet; 63. Flow chamber; 64. Snap-fit ​​strip; 7. Drive mechanism; 8. Buckle. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0038] This application discloses a diaphragm pump.

[0039] Reference Figure 1 The diaphragm pump includes a pump head 1, a valve plate 2, a valve seat 3, a piston 4, multiple check valves 5, a cylinder seat 6, and a drive mechanism 7, with the pump head 1, valve plate 2, valve seat 3, piston 4, cylinder seat 6, and drive mechanism 7 arranged sequentially at intervals.

[0040] Reference Figure 1 and Figure 2 Specifically, the upper end of the pump head 1 is provided with an air inlet 11 and an air outlet 12. The valve plate 2 includes a mounting plate 21 and four diaphragm plates 22. The mounting plate 21 is fixedly connected to the lower end of the pump head 1. The mounting plate 21 is provided with two first air inlets 211, two first air outlets 212, four first air inlet slots 213, and a mounting slot 214. The two first air inlets 211 are connected to the air inlets 11 through the chamber at the lower end of the pump head 1, and the two first air outlets 212 are connected to the four first air inlet slots 213. The mounting slot 214 is located at the center of the mounting plate 21 and is connected to the air outlets 12 through the chamber at the lower end of the pump head 1. The four diaphragm plates 22 are fixedly connected to the mounting plate 21 at intervals at the mounting slots 214, and the diaphragm plates 22 have a certain degree of elasticity.

[0041] The valve seat 3 is fixedly connected to the lower end of the mounting plate 21. The valve seat 3 is provided with two second air inlets 31, four second air inlets 32, two second air outlets 33, and four pumping ports 34. Each second air inlet 31 is located directly below each first air inlet 211, so that each second air inlet 31 is connected to each first air inlet 211. Each second air inlet 32 ​​is located directly below each first air inlet 213, so that each second air inlet 32 ​​is connected to each first air inlet 213. Each second air outlet 33 is located directly below each first air outlet 212, so that each second air outlet 33 is connected to each first air outlet 212. Each diaphragm 22 elastically abuts against each pumping port 34, so that each pumping port 34 is isolated from the mounting groove 214.

[0042] The piston 4 includes a seat 41 and four air bladders 42. The seat 41 has two third air inlets 411 and two third air outlets 412. Each third air inlet 411 is connected to each second air inlet 31, and each third air outlet 412 is connected to each second air outlet 33. The four air bladders 42 are integrally connected to the seat 41, and each air bladder 42 is simultaneously connected to each second air inlet groove 32 and each pump air hole 34. The number of check valves 5 corresponds to the number of air bladders 42, that is, there are four check valves 5. The four check valves 5 are elastically installed at the lower end of the valve seat 3, and each check valve 5 abuts against the valve seat 3 to block each second air inlet groove 32, so that each second air inlet groove 32 is selectively connected to each air bladder 42.

[0043] The cylinder seat 6 is fixedly connected to the lower end of the valve seat 3. The cylinder seat 6 is provided with two fourth air inlets 61, two fourth air outlets 62 and a flow chamber 63. Each fourth air inlet 61 is connected to each third air inlet 411, and each fourth air outlet 62 is connected to each third air outlet 412. Both the two fourth air inlets 61 and the two fourth air outlets 62 are connected to the flow chamber 63. The four air bladders 42 are interlocked in the flow chamber 63.

[0044] The drive mechanism 7 drives the piston 4 to move back and forth. Since the drive mechanism 7 is existing technology, it will not be described in detail in this application.

[0045] In practical applications, when the drive mechanism 7 works to drive the piston 4 to move back and forth, the gas flows from the air inlet 11 to the pump head 1, and then flows through the first air inlet 211, the second air inlet 31, the third air inlet 411 and the fourth air inlet 61 in sequence to the flow chamber 63.

[0046] Afterwards, the gas passes through the fourth vent 62, the third vent 412, the second vent 33, and the first vent 212 in sequence. Since the first vent 212 is connected to the first inlet groove 213, the gas flows into the valve seat 3 through the first inlet groove 213. Under the action of the air pressure difference, the check valve 5 undergoes elastic deformation to achieve one-way communication between the second inlet groove 32 and the air bag 42, so that the second inlet groove 32 is connected to the air bag 42 and the gas flows into the air bag 42 through the second inlet groove 32.

[0047] At this time, under the action of air pressure difference, the diaphragm 22 undergoes elastic deformation to achieve one-way communication between the pump air hole 34 and the mounting groove 214, so that the gas in the air bag 42 flows through the pump air hole 34 into the mounting groove 214 and out through the air outlet 12 to realize the operation of the air pump. In this process, the gas stroke is effectively extended to reduce the gas flow rate, thereby reducing the noise of the diaphragm pump and improving the stability of air pressure, thus improving the stability of the diaphragm pump operation.

[0048] Reference Figure 2 In some embodiments, the upper end of the mounting plate 21 protrudes to form a snap connector 215. The snap connector 215 is diamond-shaped and snaps onto the lower end of the pump head 1 to achieve positioning and installation between the pump head 1 and the valve plate 2, thus ensuring the accuracy of installation between the pump head 1 and the valve plate 2.

[0049] In some embodiments, a snap-fit ​​block 35 protrudes from the upper end of the valve seat 3. The shape of the snap-fit ​​block 35 is adapted to the shape of the snap-fit ​​connector 215 so that the snap-fit ​​block 35 snaps into the snap-fit ​​connector 215 to realize the positioning installation between the valve plate 2 and the valve seat 3, thereby improving the installation accuracy between the valve plate 2 and the valve seat 3. This ensures that each first air inlet 211 is aligned with each second air inlet 31, each first air outlet 212 is aligned with each second air outlet 33, and each first air inlet groove 213 and each second air inlet groove 32, thereby ensuring the stability of gas flow.

[0050] In some embodiments, the mounting plate 21 is provided with a positioning hole 216, and the upper end of the valve seat 3 protrudes to form a positioning post 36. The positioning post 36 is a cylinder, and correspondingly, the positioning hole 216 is a round hole. The positioning post 36 is inserted into the positioning hole 216 so that the snap-fit ​​block 35 is aligned with the snap-fit ​​connector 215, thereby facilitating the positioning and installation between the valve plate 2 and the valve seat 3.

[0051] In some embodiments, the lower end of the pump head 1 is provided with a plurality of positioning grooves 13, and the upper end of the valve seat 3 protrudes to form a plurality of positioning blocks 37. Each positioning block 37 is embedded in each positioning groove 13 to realize the positioning installation between the pump head 1 and the valve seat 3, so that the installation between the pump head 1 and the valve seat 3 is more accurate.

[0052] In some embodiments, the upper end of the valve seat 3 protrudes to form four mounting posts 38, and each check valve 5 is elastically snapped into each mounting post 38 to facilitate the installation of the check valve 5 and to facilitate the elastic deformation of the check valve 5, thereby ensuring the stability of the unidirectional communication between the second air inlet groove 32 and the air bag 42.

[0053] In some embodiments, the upper end of the cylinder seat 6 protrudes to form a plurality of snap-fit ​​strips 64, each snap-fit ​​strip 64 passing through the seat body 41 and snapping onto the lower end of the valve seat 3, so as to facilitate the positioning and installation between the valve seat 3 and the cylinder seat 6.

[0054] Reference Figure 1 In some embodiments, the diaphragm pump also includes multiple snap-fits 8, and the pump head 1, valve seat 3 and cylinder seat 6 are snapped together and fixed by the multiple snap-fits 8 to facilitate the assembly of the pump head 1, valve seat 3 and cylinder seat 6.

[0055] The implementation principle of this embodiment is as follows: In practical application, when the drive mechanism 7 works to drive the piston 4 to bounce back and forth, the gas flows from the air inlet 11 to the pump head 1, and then flows through the first air inlet 211, the second air inlet 31, the third air inlet 411 and the fourth air inlet 61 in sequence to the flow chamber 63.

[0056] Afterwards, the gas passes through the fourth vent 62, the third vent 412, the second vent 33, and the first vent 212 in sequence. Since the first vent 212 is connected to the first inlet groove 213, the gas flows into the valve seat 3 through the first inlet groove 213. Under the action of the air pressure difference, the check valve 5 undergoes elastic deformation to achieve one-way communication between the second inlet groove 32 and the air bag 42, so that the second inlet groove 32 is connected to the air bag 42 and the gas flows into the air bag 42 through the second inlet groove 32.

[0057] At this time, under the action of air pressure difference, the diaphragm 22 undergoes elastic deformation to achieve one-way communication between the pump air hole 34 and the mounting groove 214, so that the gas in the air bag 42 flows through the pump air hole 34 into the mounting groove 214 and out through the air outlet 12 to realize the operation of the air pump. In this process, the gas stroke is effectively extended to reduce the gas flow rate, thereby reducing the noise of the diaphragm pump and improving the stability of air pressure, thus improving the stability of the diaphragm pump operation.

[0058] 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, characterized in that, include: Pump head (1), the pump head (1) is provided with an air inlet (11) and an air outlet (12). Valve plate (2), the valve plate (2) includes mounting plate (21) and multiple diaphragm plates (22); the mounting plate (21) is located at the lower end of the pump head (1), and the mounting plate (21) is provided with multiple first air inlets (211), multiple first air outlets (212), multiple first air inlets (213) and mounting grooves (214); the multiple first air inlets (211) are connected to the air inlet (11); the multiple first air outlets (212) are connected to the multiple first air inlets (213); the mounting groove (214) is connected to the air outlet (12) and the multiple diaphragm plates (22) are spaced apart in the mounting groove (214); Valve seat (3), the valve seat (3) is located at the lower end of the mounting plate (21), the valve seat (3) is provided with a plurality of second air inlets (31), a plurality of second air inlets (32), a plurality of second air outlets (33) and a plurality of pumping holes (34), each of the second air inlets (31) is connected to each of the first air inlets (211), each of the second air inlets (32) is connected to each of the first air inlets (213), each of the second air outlets (33) is connected to each of the first air outlets (212), each of the pumping holes (34) is connected to the mounting groove (214), and each of the diaphragms (22) is elastically abutted against each of the pumping holes (34). Piston (4), the piston (4) includes a seat (41) and a plurality of air bladders (42), the seat (41) is provided with a plurality of third air inlets (411) and a plurality of third air outlets (412), each of the third air inlets (411) is connected to each of the second air inlets (31), each of the third air outlets (412) is connected to each of the second air outlets (33), the plurality of air bladders (42) are provided on the seat (41), and each of the air bladders (42) is connected to each of the second air inlets (32) and each of the pumping holes (34); Multiple check valves (5) are elastically disposed on the valve seat (3) to block multiple second air inlet slots (32) so that each second air inlet slot (32) is selectively connected to each airbag (42); The cylinder seat (6) is located at the lower end of the valve seat (3). The cylinder seat (6) is provided with a plurality of fourth air inlets (61), a plurality of fourth air outlets (62) and a flow chamber (63). Each of the fourth air inlets (61) is connected to each of the third air inlets (411), each of the fourth air outlets (62) is connected to each of the third air outlets (412), and each of the fourth air inlets (61) and each of the fourth air outlets (62) is connected to the flow chamber (63). The plurality of air bladders (42) are engaged in the flow chamber (63).

2. A diaphragm pump according to claim 1, characterized in that, The upper end of the mounting plate (21) is provided with a snap-fit ​​connector (215), which snaps onto the lower end of the pump head (1).

3. A diaphragm pump according to claim 2, characterized in that, The valve seat (3) is provided with a snap-fit ​​block (35) at its upper end, and the snap-fit ​​block (35) is snapped into the snap-fit ​​connector (215).

4. A diaphragm pump according to claim 3, characterized in that, The mounting plate (21) is provided with a positioning hole (216), and the upper end of the valve seat (3) is provided with a positioning post (36), which is inserted into the positioning hole (216).

5. A diaphragm pump according to claim 1, characterized in that, The lower end of the pump head (1) is provided with multiple positioning grooves (13), and the upper end of the valve seat (3) is provided with multiple positioning blocks (37), each positioning block (37) being embedded in each positioning groove (13).

6. A diaphragm pump according to claim 1, characterized in that, The upper end of the valve seat (3) is provided with multiple mounting posts (38), and each check valve (5) is elastically snapped into each mounting post (38).

7. A diaphragm pump according to claim 1, characterized in that, The upper end of the cylinder seat (6) is provided with a plurality of snap-fit ​​strips (64), each of the snap-fit ​​strips (64) passing through the seat body (41) and snapped to the lower end of the valve seat (3).

8. A diaphragm pump according to claim 1, characterized in that, The diaphragm pump also includes multiple snap fasteners (8), and the pump head (1), the valve seat (3), and the cylinder seat (6) are snapped together and fixed by the multiple snap fasteners (8).

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