Damping type layered diaphragm pump

Abstract

The utility model belongs to the field of diaphragm pumps, and discloses a damping type layered diaphragm pump which comprises an inlet, a low-pressure cavity, a movable cavity, a buffer cavity, a high-pressure cavity and an outlet which are sequentially communicated, and the buffer cavity is used for buffering liquid entering the high-pressure cavity; the high-pressure cavity is arranged in the center, and the low-pressure cavity is annularly arranged on the periphery of the high-pressure cavity. After liquid enters the low-pressure cavity from the inlet, the movable cavity pumps the liquid in the low-pressure cavity to the buffer cavity, then the liquid enters the high-pressure cavity, and finally the liquid is sent out from the outlet. The low-pressure cavity is annularly arranged on the periphery of the high-pressure cavity, the buffering cavity is arranged to buffer high-pressure liquid and then pump the high-pressure liquid to the high-pressure cavity, the buffering cavity is used for buffering the liquid, the liquid entering the high-pressure cavity is more stable, and rapid flow is avoided.

Description

Technical Field

[0001] The utility model relates to the field of diaphragm pumps, in particular to a damping type layered diaphragm pump. Background Art

[0002] Diaphragm pumps are commonly used for boosting water heaters, high-rise pipelines, water purifiers, etc. Diaphragm pumps are a common type of booster pump. Diaphragm pumps generally use a driving mechanism to drive the flexible diaphragm to move repeatedly, thereby repeatedly changing the size of the active cavity to achieve pressurization of the transported liquid. The liquid in the low-pressure cavity passes through the active cavity and is directly sent out from the high-pressure cavity. The liquid entering the low-pressure cavity has problems of uneven water inflow and instability, while the liquid in the high-pressure cavity produces high-pressure pulse characteristics, and there are also problems of uneven and unstable water discharge.

[0003] In order to solve the above technical problems, patent CN219509787U sets a first diversion damping plate in the low-pressure water inlet chamber. After the tap water entering the low-pressure water inlet chamber from the water inlet pipe is diverted through several first diversion holes on the first diversion damping plate, its water pressure can be reduced to avoid the problem of too fast water flow; and sets a second diversion damping plate in the high-pressure water inlet chamber. After the high-pressure water coming out of the center of the valve core is diverted through several second diversion holes on the second diversion damping plate, its water pressure can be reduced, and then the damping structure set in the diaphragm pump is used for buffering and shock reduction. However, since the first diversion damping plate and the second diversion damping plate are both solid, they play a certain blocking role on the water flow, and cannot play a role in caching the water flow, which affects the water output to a certain extent.

[0004] Patent CN118148892A discloses a reverse flow damping seismic isolation diaphragm pump, which adopts a conveying method in which liquid flows from the center to the surrounding areas, and arranges the high-pressure liquid outlet chamber in layers, thereby achieving pressure stabilization, making the liquid outlet flow uniform and the pressure stable; however, this technical solution changes the high-pressure liquid outlet chamber to be arranged in layers, and changes the flow method of liquid flowing from the surrounding areas to the center. Utility Model Content

[0005] In order to overcome at least one of the defects described in the above-mentioned prior art, the utility model provides a damping layered diaphragm pump, in which a low-pressure chamber ring is arranged on the outer periphery of the high-pressure chamber, and a buffer chamber is provided to buffer the high-pressure liquid before pumping it into the high-pressure chamber. The buffer chamber is used to cache the liquid, so that the liquid entering the high-pressure chamber is more stable.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A damping layered diaphragm pump comprises an inlet, a low-pressure chamber, an active chamber, a buffer chamber, a high-pressure chamber and an outlet which are connected in sequence, wherein the buffer chamber is used to buffer the liquid entering the high-pressure chamber;

[0008] The high-pressure chamber is arranged in the center, and the low-pressure chamber is arranged around the periphery of the high-pressure chamber;

[0009] After the liquid enters the low-pressure chamber from the inlet, the active chamber pumps the liquid in the low-pressure chamber to the buffer chamber, then enters the high-pressure chamber, and finally is sent out from the outlet.

[0010] In a preferred embodiment, the low-pressure chamber includes a first low-pressure sub-chamber, a second low-pressure sub-chamber, and a plurality of first connecting holes, and the first low-pressure sub-chamber and the second low-pressure sub-chamber are sequentially arranged from top to bottom along the axial direction of the high-pressure chamber;

[0011] A plurality of first connection holes are arranged at intervals along the circumference of the first low-pressure sub-chamber and the circumference of the second low-pressure sub-chamber, and the first low-pressure sub-chamber and the second low-pressure sub-chamber are communicated with each other through the first connection holes.

[0012] In a preferred embodiment, the high pressure chamber, the buffer chamber and the active chamber are arranged sequentially from top to bottom along the axial direction of the high pressure chamber.

[0013] In a preferred embodiment, multiple active cavities and multiple cache cavities are provided, the multiple active cavities are arranged circumferentially, the multiple cache cavities are also arranged circumferentially, and the active cavities and the cache cavities are arranged one by one;

[0014] The damped layered diaphragm pump also includes multiple second connecting holes, multiple third connecting holes and multiple fourth connecting holes. The active chamber is connected to the second low-pressure chamber through the second connecting hole, the active chamber is connected to the cache chamber through the third connecting hole, and the cache chamber is connected to the high-pressure chamber through the fourth connecting hole.

[0015] In a preferred embodiment, the damping layered diaphragm pump further comprises a first check valve, which is arranged at the position of the second connecting hole and is used to open and close the second connecting hole;

[0016] And / or, the damping layered diaphragm pump further includes a second check valve, which is disposed at the position of the fourth connecting hole and is used to open and close the fourth connecting hole.

[0017] In a preferred embodiment, the damping layered diaphragm pump further comprises a pump body, the pump body comprises a first split body and a second split body, the first split body comprises a first split body main body and a first partition plate, the first split body main body and the first partition plate enclose a first low-pressure sub-chamber, a second low-pressure sub-chamber, a high-pressure chamber, an inlet and an outlet;

[0018] The second split body includes a second split body main body and a second partition plate, and the second split body and the second partition plate enclose an active cavity and a cache cavity.

[0019] In a preferred embodiment, the damped layered diaphragm pump further comprises a damping sheet, and the damping sheet is an integrated structure;

[0020] The damping plate comprises a first damping part and a second damping part. The first damping part is arranged in the low-pressure chamber, and the second damping part is arranged in the high-pressure chamber.

[0021] In a preferred embodiment, the damped layered diaphragm pump further includes a pressure relief valve, which is arranged at the position of the high-pressure chamber.

[0022] In a preferred embodiment, the damping layered diaphragm pump further comprises a diaphragm, and the diaphragm is arranged in the active chamber.

[0023] In a preferred embodiment, the damping layered diaphragm pump further includes a driving unit, an eccentric wheel and a swing frame, and the driving unit drives the swing frame to move up and down through the eccentric wheel;

[0024] The swing frame is fixedly connected to the diaphragm, a plurality of fixed points are arranged between the swing frame and the diaphragm, and each active cavity corresponds to at least one fixed point.

[0025] In summary, the utility model has the following technical effects:

[0026] 1. The low-pressure chamber ring in the utility model is arranged on the periphery of the high-pressure chamber, and a buffer chamber is provided to buffer the high-pressure liquid before pumping it to the high-pressure chamber. The buffer chamber is used to buffer the liquid, so that the liquid entering the high-pressure chamber is more stable and the rapid flow is avoided.

[0027] 2. In the utility model, the high-pressure chamber, the buffer chamber and the active chamber are arranged in sequence from top to bottom along the axial direction of the high-pressure chamber to form a layered structure. When the liquid passes through the active chamber, the buffer chamber and the high-pressure chamber from bottom to top, larger bubbles can be broken, noise can be reduced, and excessive liquid pressure entering the high-pressure area can be avoided.

[0028] 3. The low-pressure chambers in the utility model are arranged in layers. The liquid entering the first low-pressure sub-chamber from the inlet is blocked by the pump body part constituting the high-pressure chamber and undergoes the first diversion, and converges at the end far away from the inlet. In the above process, the liquid enters the second low-pressure sub-chamber from the first connecting hole to realize the second diversion. After two diversions, the liquid can enter the active chamber more evenly, so that the flow entering the active chamber and the high-pressure chamber is uniform and the pressure is stable.

[0029] 4. In the utility model, a first damping part is arranged in the low-pressure chamber, a second damping part is arranged in the high-pressure chamber, and both the low-pressure liquid inlet chamber and the high-pressure liquid outlet chamber have the functions of adjustment, vibration isolation and shock absorption; and the damping plate of the integrated structure can improve the pressure fluctuation of liquid inlet and outlet, and reduce the overall vibration of the damping layered diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a structural schematic diagram of the overall structure of the embodiment of the utility model from a first viewing angle;

[0031] Figure 2 It is a structural schematic diagram of the overall structure of the embodiment of the utility model from a second viewing angle;

[0032] Figure 3 It is a structural schematic diagram of the overall structure of the embodiment of the utility model from a third viewing angle;

[0033] Figure 4 For the utility model embodiment Figure 3 A cross-sectional schematic diagram along the AA direction (the first check valve and the second check valve are not shown);

[0034] Figure 5 This is a schematic diagram of the structure in which the first check valve is arranged in the second low-pressure sub-chamber and the second check valve is arranged in the buffer chamber according to an embodiment of the utility model;

[0035] Figure 6 This is a schematic diagram of the structure in which the first check valve is arranged in the active chamber and the second check valve is arranged in the high-pressure chamber according to an embodiment of the utility model;

[0036] Figure 7 It is a schematic diagram of the exploded structure of the overall structure of the first check valve and the second check valve provided in the embodiment of the utility model;

[0037] Figure 8 This is a schematic structural diagram of the first split body of the first viewing angle of the embodiment of the utility model;

[0038] Fig. 9 This is a schematic diagram of the structure of the first split body and the second viewing angle of an embodiment of the utility model;

[0039] Fig.10 This is a schematic diagram of the structure of the second split body of the embodiment of the utility model;

[0040] Fig.11 It is a schematic structural diagram of the second check valve of the embodiment of the utility model.

[0041] The meanings of the reference numerals are as follows:

[0042] 10. Inlet, 20. Low-pressure chamber, 201. First low-pressure sub-chamber, 202. Second low-pressure sub-chamber, 203. First connecting hole, 30. Active chamber, 40. Buffer chamber, 50. High-pressure chamber, 60. Outlet, 70. Second connecting hole, 80. Third connecting hole, 90. Fourth connecting hole, 100. First check valve, 110. Second check valve, 120. Pump body, 1201. First sub-body, 1202. Second sub-body, 1203. Reinforcing ribs, 130. Damping plate, 1301. First damping part, 1302. Second damping part, 140. Pressure relief valve, 150. Diaphragm, 160. Pump cover, 170. Swing frame. DETAILED DESCRIPTION

[0043] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0046] See also Figure 1-Figure 11 The utility model discloses a damping layered diaphragm pump, comprising an inlet 10, a low-pressure chamber 20, an active chamber 30, a buffer chamber 40, a high-pressure chamber 50 and an outlet 60 which are connected in sequence. The buffer chamber 40 is used to buffer the liquid entering the high-pressure chamber 50; the high-pressure chamber 50 is arranged in the center, and the low-pressure chamber 20 is arranged in a ring around the outer periphery of the high-pressure chamber 50; after the liquid enters the low-pressure chamber 20 from the inlet 10, the active chamber 30 pumps the liquid in the low-pressure chamber 20 to the buffer chamber 40 and then enters the high-pressure chamber 50, and finally sends it out from the outlet 60.

[0047] The low-pressure chamber 20 in the utility model is arranged on the periphery of the high-pressure chamber 50, and a buffer chamber 40 is provided to buffer the high-pressure liquid before pumping it to the high-pressure chamber 50. The buffer chamber 40 is used to buffer the liquid, so that the liquid entering the high-pressure chamber 50 is more stable, avoiding the generation of rapid flow.

[0048] It should be noted that both the inlet 10 and the outlet 60 are provided with one, the inlet 10 is used to connect the liquid inlet pipe, and the outlet 60 is used to connect the liquid outlet pipe. The utility model makes further improvements on the existing flow mode of liquid converging from the periphery to the center, so as to achieve uniform flow rate and stable pressure of the liquid outlet; the above-mentioned high-pressure chamber 50 refers to a chamber with a liquid pressure larger than that of the low-pressure chamber 20, and the above-mentioned low-pressure chamber 200 refers to a chamber with a liquid pressure smaller than that of the high-pressure chamber 50; the damped layered diaphragm pump can be connected to the municipal tap water pipe through the liquid inlet pipe and the liquid outlet pipe for use.

[0049] In an embodiment of the utility model, the low-pressure chamber 20 includes a first low-pressure sub-chamber 201, a second low-pressure sub-chamber 202 and a plurality of first connecting holes 203. The first low-pressure sub-chamber 201 and the second low-pressure sub-chamber 202 are arranged sequentially from top to bottom along the axial direction of the high-pressure chamber 50; the plurality of first connecting holes 203 are arranged at intervals along the circumference of the first low-pressure sub-chamber 201 and the circumferential direction of the second low-pressure sub-chamber 202, and the first low-pressure sub-chamber 201 and the second low-pressure sub-chamber 202 are connected to each other through the first connecting holes 203.

[0050] Preferably, the first low-pressure sub-chamber 201 and the second low-pressure sub-chamber 202 are both annular, the axial height of the low-pressure chamber 20 is less than or equal to the axial height of the high-pressure chamber 50, and the top of the low-pressure chamber 20 is lower than the top of the high-pressure chamber 50 or the top of the low-pressure chamber 20 is flush with the top of the high-pressure chamber 50, and the bottom of the low-pressure chamber 20 is higher than the bottom of the high-pressure chamber 50 or the bottom of the low-pressure chamber 20 is flush with the bottom of the high-pressure chamber 50, so that the pump body 120 part constituting the high-pressure chamber 50 can block and divert the liquid in the low-pressure chamber 20.

[0051] In the embodiment of the present invention, the high pressure chamber 50 , the buffer chamber 40 and the active chamber 30 are sequentially arranged from top to bottom along the axial direction of the high pressure chamber.

[0052] In the utility model, the high-pressure chamber 50, the buffer chamber 40 and the active chamber 30 are arranged in sequence from top to bottom along the axial direction of the high-pressure chamber to form a layered structure. When the liquid passes through the active chamber 30, the buffer chamber 40 and the high-pressure chamber 50 from bottom to top, larger bubbles can be broken, noise can be reduced, and excessive liquid pressure entering the high-pressure area can be avoided.

[0053] In the embodiment of the utility model, multiple active chambers 30 and cache chambers 40 are provided, and the multiple active chambers 30 are arranged in annular direction, and the multiple cache chambers 40 are also arranged in annular direction, and the active chambers 30 and the cache chambers 40 are arranged in one-to-one correspondence; the damping layered diaphragm pump also includes multiple second connecting holes 70, multiple third connecting holes 80 and multiple fourth connecting holes 90, the active chamber 30 is interconnected with the second low-pressure sub-chamber 202 through the second connecting hole 70, the active chamber 30 is interconnected with the cache chamber 40 through the third connecting hole 80, and the cache chamber 40 is interconnected with the high-pressure chamber 50 through the fourth connecting hole 90.

[0054] Preferably, each active cavity 30 is correspondingly provided with at least one second connection hole 70 and at least one third connection hole 80 .

[0055] It should be noted that, through the change of the internal space of the active chamber 30, the liquid can enter the low-pressure chamber 20 from the inlet 10, and the active chamber 30 pumps the liquid in the low-pressure chamber 20 to the cache chamber 40 and then enters the high-pressure chamber 50, and finally sends it out from the outlet 60; in order to achieve a better pumping effect, a first check valve 100 and a second check valve 110 are set.

[0056] In an embodiment of the utility model, the damping layered diaphragm pump also includes a first check valve 100, which is arranged at the position of the second connecting hole 70, and the first check valve 100 is used to open and close the second connecting hole 70; and / or, the damping layered diaphragm pump also includes a second check valve 110, which is arranged at the position of the fourth connecting hole 90, and the second check valve 110 is used to open and close the fourth connecting hole 90.

[0057] Preferably, the first check valve 100 and the second check valve 110 are both made of flexible materials. The first check valve 100 is a flexible diaphragm that can open and close the second connecting hole 70 according to the change of the internal space of the active chamber 30, and the second check valve 110 is a flexible diaphragm that can open and close the fourth connecting hole 90 according to the change of the internal space of the active chamber 30.

[0058] It should be noted that Figure 4 The liquid flow direction in the figure only indicates the overall flow direction, and specifically has a pulse characteristic according to the settings of the first check valve 100 and the second check valve 110 and the changes of the active chamber 30, as follows:

[0059] See also Figure 5 The first check valve 100 is arranged in the second low-pressure sub-chamber 202, and the second check valve 110 is arranged in the cache chamber 40; when the first check valve 100 is opened, the second check valve 110 is closed, and the liquid enters the cache chamber 40 from the low-pressure chamber 20 and the active chamber 30; when the first check valve 100 is closed, the second check valve 110 is opened, and the liquid in the cache chamber 40 enters the high-pressure chamber 50.

[0060] Or see Figure 6 The first check valve 100 is arranged in the active chamber 30, and the second check valve 110 is arranged in the high-pressure chamber 50; when the first check valve 100 is opened, the second check valve 110 is closed, and the liquid enters the cache chamber 40 from the low-pressure chamber 20 and the active chamber 30; when the first check valve 100 is closed, the second check valve 110 is opened, and the liquid in the cache chamber 40 enters the high-pressure chamber 50.

[0061] That is, the specific setting positions of the first check valve 100 and the second check valve 110 are determined according to the actual application scenario, so that after the liquid enters the low-pressure chamber 20 from the inlet 10, the active chamber 30 pumps the liquid in the low-pressure chamber 20 to the cache chamber 40 and then enters the high-pressure chamber 50.

[0062] In an embodiment of the utility model, the damping layered diaphragm pump also includes a pump body 120, the pump body 120 includes a first split body 1201 and a second split body 1202, the first split body 1201 includes a first split body 1201 main body and a first partition, the first split body 1201 main body and the first partition form a first low-pressure sub-chamber 201, a second low-pressure sub-chamber 202, a high-pressure chamber 50, an inlet 10 and an outlet 60; the second split body 1202 includes a second split body 1202 main body and a second partition, the second split body 1202 main body and the second partition form an active chamber 30 and a cache chamber 40.

[0063] Preferably, the high-pressure chamber 50 is arranged at the center of the pump body 120, the low-pressure chamber 20 is annular as a whole, and the low-pressure chamber 20 is sleeved on the outer periphery of the high-pressure chamber 50; the inlet 10 is arranged on one side of the pump body 120 in the radial direction, and the outlet 60 is arranged on the other side of the pump body 120 in the radial direction.

[0064] The low-pressure chamber 20 in the utility model is arranged in layers, and the liquid entering the first low-pressure sub-chamber 201 from the inlet 10 is blocked by the pump body 120 part constituting the high-pressure chamber 50 for the first diversion, and converges at the end far away from the inlet 10; in the above process, the liquid enters the second low-pressure sub-chamber 202 from the first connecting hole 203 to realize the second diversion. After two diversions, the liquid can enter the active chamber 30 more evenly, so that the flow entering the active chamber 30 and the high-pressure chamber 50 is uniform and the pressure is stable.

[0065] In an embodiment of the utility model, the damping layered diaphragm pump also includes a damping plate 130, which is an integrated structure; the damping plate 130 includes a first damping part 1301 and a second damping part 1302, the first damping part 1301 is arranged in the low-pressure chamber 20, and the second damping part 1302 is arranged in the high-pressure chamber 50.

[0066] In the utility model, a first damping part 1301 is arranged in the low-pressure chamber 20, and a second damping part 1302 is arranged in the high-pressure chamber 50. Both the low-pressure liquid inlet chamber and the high-pressure liquid outlet chamber have the functions of adjustment, vibration isolation and shock absorption; and the damping plate 130 with an integrated structure can improve the pressure fluctuation of liquid inlet and outlet and reduce the overall vibration of the damping layered diaphragm pump.

[0067] Preferably, the damping plate 130 is a flexible structure, and is made of a rubber material, a silicone material or a polymer material, whichever is more capable of achieving a buffering effect.

[0068] Specifically, there is a buffer gap between the first low-pressure sub-chamber 201 and the damping plate 130 , and a pump cover 160 may be provided to cover the end of the pump body 120 in the axial direction, so that the damping plate 130 can be used to buffer the liquid.

[0069] In the embodiment of the utility model, the damping layered diaphragm pump further includes a pressure relief valve 140 , which is disposed at the position of the high pressure chamber 50 .

[0070] In the embodiment of the utility model, the damping layered diaphragm pump further includes a diaphragm 150 , which is disposed in the active chamber 30 . The diaphragm 150 changes the internal space of the active chamber 30 through movement, thereby opening and closing the first check valve 100 and the second check valve 110 .

[0071] In an embodiment of the utility model, the damped layered diaphragm pump also includes a driving unit, an eccentric wheel and a swing frame 170. The driving unit drives the swing frame 170 to move up and down through the eccentric wheel; the swing frame 170 is fixedly connected to the diaphragm 150, and multiple fixed points are arranged between the swing frame 170 and the diaphragm 150, and there is at least one fixed point corresponding to each active cavity 30.

[0072] Specifically, the driving unit and the eccentric wheel are not drawn. The driving unit is a motor. How to use the driving unit, the eccentric wheel and the swing frame 170 to make up and down movements can be achieved by adopting existing technology and will not be repeated here. Of course, multiple cylinders can also be used to alternately drive the diaphragm 150 to alternately move up and down, so that the diaphragm 150 changes the internal space of the active chamber 30 through movement, and the multiple active chambers 30 alternately pump the liquid in the low-pressure chamber 20 into the high-pressure chamber 50 through the movement of the diaphragm 150.

[0073] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A damping layered diaphragm pump, characterized in that: It comprises an inlet, a low-pressure chamber, an active chamber, a buffer chamber, a high-pressure chamber and an outlet which are connected in sequence, wherein the buffer chamber is used to buffer the liquid entering the high-pressure chamber; The high-pressure chamber is arranged at the center, and the low-pressure chamber is arranged around the periphery of the high-pressure chamber; After the liquid enters the low-pressure chamber from the inlet, the active chamber pumps the liquid in the low-pressure chamber to the buffer chamber, then the liquid enters the high-pressure chamber, and finally is sent out from the outlet.

2. The damping layered diaphragm pump according to claim 1, characterized in that: The low-pressure chamber comprises a first low-pressure sub-chamber, a second low-pressure sub-chamber and a plurality of first connecting holes, wherein the first low-pressure sub-chamber and the second low-pressure sub-chamber are sequentially arranged from top to bottom along the axial direction of the high-pressure chamber; The plurality of first connection holes are arranged at intervals along the circumference of the first low-pressure sub-chamber and the circumference of the second low-pressure sub-chamber, and the first low-pressure sub-chamber and the second low-pressure sub-chamber are connected to each other through the first connection holes.

3. The damping layered diaphragm pump according to claim 1, characterized in that: The high-pressure chamber, the buffer chamber, and the active chamber are sequentially arranged from top to bottom along the axial direction of the high-pressure chamber.

4. The damping layered diaphragm pump according to claim 2, characterized in that: The movable cavity and the cache cavity are both provided with a plurality, the plurality of movable cavities are arranged circumferentially, the plurality of cache cavities are also arranged circumferentially, and the movable cavity and the cache cavity are arranged in one-to-one correspondence; It also includes multiple second connecting holes, multiple third connecting holes and multiple fourth connecting holes. The active chamber is connected to the second low-pressure sub-chamber through the second connecting holes, the active chamber is connected to the cache chamber through the third connecting holes, and the cache chamber is connected to the high-pressure chamber through the fourth connecting holes.

5. The damping layered diaphragm pump according to claim 4, characterized in that: It also includes a first check valve, which is arranged at the position of the second connecting hole and is used to open and close the second connecting hole; And / or, it also includes a second check valve, which is arranged at the position of the fourth connecting hole, and the second check valve is used to open and close the fourth connecting hole.

6. The damping layered diaphragm pump according to claim 4, characterized in that: The pump body also includes a first sub-body and a second sub-body, the first sub-body includes a first sub-body main body and a first partition, the first sub-body and the first partition enclose the first low-pressure sub-chamber, the second low-pressure sub-chamber, the high-pressure chamber, the inlet and the outlet; The second split body includes a second split body and a second partition, and the second split body and the second partition form the active cavity and the cache cavity.

7. The damping layered diaphragm pump according to claim 1, characterized in that: Also includes a damping sheet, the damping sheet is an integrated structure; The damping plate includes a first damping part and a second damping part. The first damping part is arranged in the low-pressure chamber, and the second damping part is arranged in the high-pressure chamber.

8. The damping layered diaphragm pump according to claim 1, characterized in that: It also includes a pressure relief valve, which is arranged at the position of the high-pressure chamber.

9. The damping layered diaphragm pump according to claim 1, characterized in that: Also included is a diaphragm, which is disposed in the active cavity.

10. The damping layered diaphragm pump according to claim 9, characterized in that: It also includes a driving unit, an eccentric wheel and a swing frame, wherein the driving unit drives the swing frame to move up and down through the eccentric wheel; The swing frame is fixedly connected to the diaphragm, a plurality of fixing points are arranged between the swing frame and the diaphragm, and each of the active cavities corresponds to at least one of the fixing points.

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