Foam diaphragm pump

Abstract

The utility model relates to the field of diaphragm pumps, in particular to a foam type diaphragm pump which comprises an upper cover which is provided with a liquid inlet, a liquid outlet and an air inlet hole, a liquid inlet channel and a liquid outlet channel are defined by the upper cover and an upper valve plate, a pump body comprises a cylinder body, the upper valve plate and a lower valve plate, the upper valve plate is connected with the upper cover, and the upper valve plate and the lower valve plate are provided with the liquid inlet channel and the liquid outlet channel. The cylinder body is connected with the lower valve plate, and a plurality of sealing cavities communicated with the liquid inlet channel and the liquid outlet channel are formed between the cylinder body and the lower valve plate; the valve plate is arranged between the upper valve plate and the lower valve plate and provided with a one-way valve, the one-way communication direction points to the liquid outlet channel from the liquid inlet channel, the liquid storage assembly comprises a leather cup, the upper end of the leather cup is communicated with the sealing cavity, the driving mechanism is used for axially extruding the leather cup to enable the leather cup to deform, and a plug body and a filter screen body are sequentially arranged on the liquid outlet channel. And then finer foam is formed through the filter screen body, so that the quality and the uniformity of the output foam are ensured, and the foam better meets the requirements of practical application.

Description

Technical Field

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

[0002] Miniature diaphragm pumps are widely used in small household appliances, testing equipment, and medical equipment. Their working principle is to increase the pressure of liquids or gases to make them flow. Essentially, they are devices that move liquid or gas media through pressure differences.

[0003] Some existing miniature diaphragm pumps, in their actual design, rely on the negative pressure generated by the expansion of the cup cavity to draw in liquid, and then rely on the compression of the cup cavity to pump the liquid out. Their operating principle is as follows: the diaphragm pump rotates an eccentric wheel, and the eccentric angle of the eccentric wheel's eccentric hole causes the pendulum of the swing frame to periodically rise and fall, thereby causing the cup cavity to periodically compress and expand. When the pendulum moves downward, the cup cavity is stretched and expanded; at this time, the inlet check valve opens downward, and the outlet check valve adheres to the valve plate, allowing fluid to enter the cup cavity from the inlet channel. When the pendulum moves upward, the cup cavity is compressed; at this time, the inlet check valve adheres to the valve plate, the valve plate opens upward, and the fluid is pumped out from the outlet channel. Existing diaphragm pumps are mostly general fluid pumps. When foam generation is required, a special foam-generating device needs to be added to the diaphragm pump's outlet, resulting in low efficiency and uneven foam production. Utility Model Content

[0004] The purpose of this invention is to provide a foam-type diaphragm pump, which aims to solve the problem that the diaphragm pump cannot generate foam in the above-mentioned technical problems, so that the foam generated by the diaphragm pump is highly efficient and the foam is more uniform.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A foam diaphragm pump, comprising:

[0007] The top cover is provided with a liquid inlet and a liquid outlet;

[0008] The pump body includes a cylinder, an upper valve plate, and a lower valve plate, wherein the upper valve plate is connected to the upper cover;

[0009] An inlet channel is provided on the upper valve plate, and an outlet channel is provided on the lower valve plate. The inlet channel and the outlet channel are respectively connected to the inlet and the outlet.

[0010] A valve plate is disposed between the upper valve plate and the lower valve plate;

[0011] A one-way valve is provided on the valve plate, and the one-way conduction direction of the one-way valve is from the liquid inlet channel to the liquid outlet channel;

[0012] The cylinder body is connected to the lower valve plate, and a plurality of sealed cavities are formed between the cylinder body and the lower valve plate. The liquid inlet channel and the liquid outlet channel are both connected to the sealed cavities.

[0013] A liquid storage assembly, the liquid storage assembly including a leather cup, the upper end of the leather cup being connected to the sealing cavity;

[0014] A driving mechanism is used to squeeze the leather cup and deform it in the axial direction.

[0015] The upper cover and the upper valve plate form an inlet channel and an outlet channel, and an air inlet is provided on the upper cover, which is connected to the inlet channel.

[0016] A plug and a filter screen are provided on the liquid outlet channel. The plug has multiple sets of small holes, and the filter screen is stacked together and arranged sequentially along the liquid outlet direction of the liquid outlet channel.

[0017] This utility model also has the following technical features:

[0018] In one embodiment of the present invention, the upper cover is provided with a first chamber and a second chamber, the first chamber and the upper valve plate form an inlet channel, the second chamber and the upper valve plate form an outlet channel, and the plug and filter screen are installed in the second chamber.

[0019] In one embodiment of the present invention, the first chamber is disposed around the second chamber.

[0020] In one embodiment of the present invention, the plug body is generally rectangular frame-shaped, the multiple sets of small holes are arranged in an array at the bottom of the frame of the plug body, and the filter screen is generally rectangular sheet-shaped and covers the opening of the frame of the plug body.

[0021] In one embodiment of this utility model, multiple sets of the diaphragm cups are arranged along the circumferential direction of the pump body. Multiple liquid inlet holes and liquid outlet holes are provided on the upper valve plate and the lower valve plate. The liquid inlet holes are connected to the liquid inlet channel and the sealing cavity, and the liquid outlet holes are connected to the liquid outlet channel and the sealing cavity. The rim of the diaphragm cup abuts against the lower valve plate, and the liquid inlet holes and liquid outlet holes are located inside the rim. The diaphragm cups constitute the sealing cavity.

[0022] In one embodiment of this utility model, four sets of leather bowls are provided.

[0023] In one embodiment of this utility model, the valve plate is provided with multiple sets of first flexible sealing plates and second flexible sealing plates;

[0024] The first flexible sealing sheet and the liquid inlet hole on the upper valve plate form a sealing or disengaging fit;

[0025] The second flexible sealing sheet forms a sealing or disengaging fit with the liquid outlet hole on the lower valve plate.

[0026] In one embodiment of this utility model, the liquid inlet is opened near the edge of the upper valve plate and the lower valve plate, and the liquid outlet is opened near the center of the upper valve plate and the lower valve plate.

[0027] In one embodiment of this utility model, the driving mechanism includes:

[0028] A drive motor, the output end of which is connected to the diaphragm via a connecting assembly;

[0029] The bottom cover has one end connected to the drive motor and the other end connected to one end of the cylinder body. The connecting component is located inside the bottom cover.

[0030] In one embodiment of this utility model, the connecting component includes:

[0031] A display stand, wherein the display stand is connected to one end of the leather bowl;

[0032] A connecting shaft, one end of which is connected to the middle of the swing frame;

[0033] An eccentric wheel is connected to the output end of the drive motor.

[0034] Compared with existing technologies, the beneficial effects of this utility model are as follows: During use, air and fluid can be sent into the diaphragm cup through the liquid inlet, air inlet, and liquid inlet channel. The diaphragm cup is then squeezed by the drive mechanism, causing the air and fluid inside the diaphragm cup to flow out through the liquid outlet channel and enter the stopper. The multiple sets of small holes on the stopper allow the fluid containing air to initially form larger bubbles. Then, by passing through the filter, the formed bubbles can be further refined, thus forming uniform foam. Therefore, the foam produced by this diaphragm pump is highly efficient and the foam is more uniform. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a foam diaphragm pump according to one embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the foam diaphragm pump after the top cover is removed in one embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the foam diaphragm pump after the top cover and upper valve plate are removed in one embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the foam diaphragm pump after the top cover, upper valve plate and valve plate are removed in one embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the foam diaphragm pump after the upper cover, upper valve plate, valve plate and lower valve plate are removed in one embodiment of the present invention;

[0040] Figure 6 This is an exploded view of a foam diaphragm pump according to one embodiment of the present invention;

[0041] Figure 7 and Figure 8 These are schematic diagrams of the upper cover from two different perspectives in one embodiment of this utility model;

[0042] Figure 9 and Figure 10 These are schematic diagrams of the valve plate from two different perspectives in one embodiment of this utility model;

[0043] Figure 11 and Figure 12 These are schematic diagrams of the upper valve plate from two different perspectives in one embodiment of this utility model;

[0044] Figure 13 and Figure 14 These are schematic diagrams of the lower valve plate from two different perspectives in one embodiment of the present invention;

[0045] Explanation of icon numbers:

[0046] 10. Top cover; 11. Liquid inlet; 12. Liquid outlet; 13. Air inlet; 14. First chamber; 15. Second chamber;

[0047] 20. Pump body; 21. Cylinder body; 22. Upper valve plate; 23. Lower valve plate;

[0048] 30. Valve plate; 31. First flexible sealing plate; 32. Second flexible sealing plate;

[0049] 40. Leather bowl;

[0050] 50. Plug body;

[0051] 60. Filter body;

[0052] 70. Drive motor; 71. Swing frame; 72. Connecting shaft; 73. Eccentric wheel;

[0053] 80. Bottom cover;

[0054] a. Liquid inlet; b. Liquid outlet. Detailed Implementation

[0055] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0056] The illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0057] It should be noted that most existing diaphragm pumps are general fluid pumps. When foam generation is required, a special foam-generating device needs to be added to the outlet of the diaphragm pump. However, the actual foam generation efficiency is low and the foam is not uniform. To address this, a foam-type diaphragm pump is proposed, comprising: an upper cover 10, which has an inlet 11 and an outlet 12; a pump body 20, including a cylinder 21, an upper valve plate 22, and a lower valve plate 23, wherein the upper valve plate 22 is connected to the upper cover 10; an inlet channel is provided on the upper valve plate 22, and an outlet channel is provided on the lower valve plate 23, wherein the inlet channel and the outlet channel are respectively connected to the inlet 11 and the outlet 12; a valve plate 30, disposed between the upper valve plate 22 and the lower valve plate 23; and a one-way valve is provided on the valve plate 30, wherein the one-way flow direction of the one-way valve is through the inlet channel. The liquid outlet channel is provided; the cylinder body 21 is connected to the lower valve plate 23, and multiple sealing cavities are formed between the cylinder body 21 and the lower valve plate 23. The liquid inlet channel and the liquid outlet channel are both connected to the sealing cavities; a liquid storage assembly is provided, which includes a rubber cup 40, the upper end of which is connected to the sealing cavity; a driving mechanism is provided to squeeze the rubber cup and deform it in the axial direction; wherein, the upper cover 10 and the upper valve plate 22 enclose and form a liquid inlet channel and a liquid outlet channel, and an air inlet 13 is provided on the upper cover 10, which is connected to the liquid inlet channel; a plug body 50 and a filter screen body 60 are provided on the liquid outlet channel, the plug body 50 is provided with multiple sets of small holes, and the filter screen body 60 is stacked together and arranged sequentially along the liquid outlet direction of the liquid outlet channel.

[0058] In one embodiment, see Figure 2 and Figure 6As shown, a plug body 50 and a filter body 60 are provided on the liquid outlet channel. The plug body 50 is provided with multiple sets of small holes. The filter body 60 is stacked with the plug body 50 and arranged sequentially along the liquid outlet direction of the liquid outlet channel. This can effectively refine and densify the generated foam, thereby ensuring the quality and uniformity of the output foam, making it more in line with the needs of practical applications.

[0059] By connecting the inlet channel to the air inlet 13, the gas and liquid can be fully mixed during the liquid inlet process. Combined with the structural design of the pump body 20, when the piston cup 40 is squeezed and deformed by the drive mechanism, the flow of liquid in the sealed cavity, along with the action of the one-way valve, can efficiently convert the mixed gas and liquid into foam, which is then output from the outlet channel. Compared with traditional diaphragm pumps, this design can better realize the generation and delivery of foam, meeting the needs of specific fields for foamy liquids, such as cleaning and foaming industries.

[0060] In one embodiment, the upper valve plate 22 is provided with an inlet channel and the lower valve plate 23 is provided with an outlet channel. The one-way flow direction of the one-way valve on the valve plate is from the inlet channel to the outlet channel. This structural design can effectively control the flow direction of the liquid, avoid liquid backflow, and ensure the stability and reliability of the liquid flow during the operation of the pump, thereby improving the stability and quality of foam generation.

[0061] In one embodiment, see Figure 7 As shown, the upper cover 10 is provided with a first chamber 14 and a second chamber 15. The first chamber 14 and the upper valve plate 22 form an inlet channel, and the second chamber 15 and the upper valve plate 22 form an outlet channel. The plug body 50 and the filter body 60 are installed in the second chamber 15.

[0062] Specifically, see Figure 7 The liquid inlet channel formed between the first chamber 14 and the upper valve plate 22 can be regarded as part of the entire liquid inlet channel. The air inlet 13 is opened on the upper cover 10. The air inlet 13 is a small hole, which allows air to be initially mixed in the liquid inlet channel formed between the first chamber 14 and the upper valve plate 22.

[0063] Similarly, see Figure 7 The liquid outlet channel formed between the second chamber 15 and the upper valve plate 22 can also be regarded as part of the liquid outlet channel formed between the entire second chamber 15 and the upper valve plate 22. The liquid flow of the mixed oil and air is compressed and drawn in through the cup 40 and squeezed out through the liquid outlet channel to combine with the plug body 50 and the filter body 60. The diaphragm pump first forms large foam through the larger holes of the plug body 50, and then forms finer foam through the filter body 60, thereby ensuring the quality and uniformity of the output foam, making it more in line with the needs of practical applications.

[0064] In one embodiment, when the diaphragm pump is actually arranged in each chamber, the first chamber 14 surrounds the second chamber 15, the tube in the middle of the upper cover 10 of the entire diaphragm pump forms the liquid outlet 12, and the tube at the edge of the upper cover 10 forms the liquid inlet 11.

[0065] In one embodiment, see Figure 2 and Figure 6 The plug body 50 has a rectangular frame structure, and the multiple sets of small holes are arranged in an array at the bottom of the frame of the plug body 50. The filter body 60 has a rectangular sheet shape and covers the opening of the frame of the plug body 50.

[0066] In one embodiment, the axial dimension of the second chamber 15 should match the axial dimension of the filter body 60 and the plug 50, so as to effectively hold the filter body 60 and the plug 50 in the mounting chamber enclosed between the upper cover 10 and the upper valve plate 22, and avoid the filter body 60 and the plug 50 from having excess space.

[0067] In one embodiment, see Figures 11 to 14 The piston cup 40 is provided in multiple sets along the circumferential direction of the pump body 20. The upper valve plate 22 and the lower valve plate 23 are provided with multiple liquid inlet holes a and liquid outlet holes b. The liquid inlet hole a is connected to the liquid inlet channel and the sealing cavity, and the liquid outlet hole a is connected to the liquid outlet channel and the sealing cavity. The mouth of the piston cup 40 abuts against the lower valve plate 23 and the liquid inlet hole a and the liquid outlet hole b are located inside the mouth of the bowl. The piston cup 50 forms a sealing cavity.

[0068] In one embodiment, the leather cup 40 is provided in 3 to 6 sets.

[0069] In a preferred embodiment, the leather cups 40 are provided in 4 sets.

[0070] In one embodiment, the valve plate 30 in the diaphragm pump is designed to have multiple sets of first flexible sealing plates 31 and second flexible sealing plates 32. To enable the valve plate 30 to function as a one-way valve, the first flexible sealing plate 31 and the inlet hole a on the upper valve plate 22 are in a sealing or separating fit; the second flexible sealing plate 32 and the outlet hole b on the lower valve plate 23 are in a sealing or separating fit.

[0071] In this configuration, when the drive assembly drives the cup 40 to move axially, the negative pressure causes the liquid flow mixed with air to enter the cavity formed between the valve plate 30 and the upper valve plate 22 through the liquid inlet a of the upper valve plate 22. This causes the first flexible sealing sheet 31 to deform and separate from the liquid inlet a on the upper valve plate 22, allowing the liquid flow mixed with air to enter the sealed cavity. Through the axial extension and retraction of the cup 40, the liquid flow mixed with air enters the cavity formed between the lower valve plate 23 and the valve plate 30 through the liquid outlet b on the lower valve plate 23. This causes the second flexible sealing sheet 32 ​​to deform and separate from the liquid outlet b on the lower valve plate 23, allowing the liquid flow mixed with air to enter the liquid outlet channel formed between the second chamber 15 and the upper valve plate 22 for further foaming, resulting in a denser and more uniform foam.

[0072] In one embodiment, when the inlet hole a and outlet hole b on the upper valve plate 22 and lower valve plate 23 of the diaphragm pump are actually opened, the inlet hole a is opened near the edge of the upper valve plate 22 and the lower valve plate 23, and the outlet hole b is opened near the center of the upper valve plate 22 and the lower valve plate 23.

[0073] In a preferred embodiment, to further ensure the sealing reliability of the upper valve plate 22 and the upper cover 10, and the sealing performance of the lower valve plate 23 and the cylinder body 21, a sealing gasket is sandwiched between the upper cover 10 and the upper valve plate 22, and a sealing gasket is provided between the lower valve plate 23 and the cylinder body 21.

[0074] This makes the upper valve plate 22 and the upper cover 10, as well as the lower valve plate 23 and the cylinder body 21, fit more tightly, preventing leakage due to gaps.

[0075] In one specific embodiment, see Figure 6 The driving mechanism includes:

[0076] A drive motor 70, the output end of which is connected to the diaphragm cup 40 via a connecting assembly;

[0077] The bottom cover 80 has one end connected to the drive motor 70 and the other end connected to one end of the cylinder 21. The connecting component is located inside the bottom cover 80.

[0078] As described above, since the output end of the drive motor 70 and the cup 40 are connected by a connecting assembly, the cup 40 deforms when the drive motor 70 rotates, thereby squeezing the fluid mixed with air inside it to transport the fluid mixed with air to the liquid outlet channel, causing the second flexible sealing sheet 32 ​​to deform, so that the fluid mixed with air is discharged from the liquid outlet hole b. The connecting assembly can connect the drive motor 70 and the cylinder 21 on the one hand, and define the installation space for installing the connecting assembly on the other hand.

[0079] In one specific embodiment, see Figure 6 The connection component includes:

[0080] The display stand 71 is connected to one end of the leather cup 40;

[0081] A connecting shaft 72, one end of which is connected to the middle of the swing frame 71;

[0082] Eccentric wheel 73 is connected to the output end of drive motor 70.

[0083] Since the swing frame 71 is connected to the lower end of the leather cup 40, and the eccentric wheel 73 is located on the output end of the drive motor 70, and the lower end of the swing frame 71 is connected to one side of the upper surface of the eccentric wheel 73, the eccentric wheel 73 and the swing frame 71 can be rotated by the drive motor 70 to squeeze the leather cup 40.

[0084] Regarding the connection between the upper cover 10 and the pump body 20, it can be fixed by bolts. The bolts pass through the upper cover 10, the upper valve plate 22, the valve plate 30 and the lower valve plate 23 and are fixed to the cylinder body 21. The connection method between the drive mechanism and the pump body 20 is a publicly known connection method, which will not be described in detail here.

[0085] In summary, a plug body 50 and a filter body 60 are installed on the liquid outlet channel. The plug body 50 has multiple sets of small holes, and the filter body 60 is stacked together with the plug body 50 and arranged sequentially along the liquid outlet direction of the liquid outlet channel. Larger foam is first formed through the larger holes of the plug body 50, and then finer foam is formed through the filter body 60, thus ensuring the quality and uniformity of the output foam, making it more suitable for practical applications. By connecting the air inlet 13 to the liquid inlet channel, the gas can be fully mixed with the liquid during the liquid inlet process. Combined with the structural design of the pump body 20, when the piston cup 40 is squeezed and deformed by the drive mechanism, the flow of liquid in the sealed cavity, in conjunction with the action of the one-way valve, can efficiently convert the mixed gas and liquid into foam, which is then output from the liquid outlet channel. Compared with traditional diaphragm pumps, this design can better realize the generation and delivery of foam, meeting the needs of specific fields for foamy liquids, such as cleaning and foaming industries.

[0086] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0087] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A foam-type diaphragm pump, characterized in that, include: The upper cover (10) is provided with a liquid inlet (11) and a liquid outlet (12). The pump body (20) includes a cylinder (21), an upper valve plate (22) and a lower valve plate (23), wherein the upper valve plate (22) is connected to the upper cover (10); An inlet channel is provided on the upper valve plate (22), and an outlet channel is provided on the lower valve plate (23). The inlet channel and the outlet channel are respectively connected to the inlet (11) and the outlet (12). A valve plate (30) is disposed between the upper valve plate (22) and the lower valve plate (23); A one-way valve is provided on the valve plate (30), and the one-way conduction direction of the one-way valve is from the liquid inlet channel to the liquid outlet channel; The cylinder body (21) is connected to the lower valve plate (23), and a plurality of sealed cavities are formed between the cylinder body (21) and the lower valve plate (23). The liquid inlet channel and the liquid outlet channel are both connected to the sealed cavities. A liquid storage assembly, the liquid storage assembly including a leather cup (40), the upper end of the leather cup (40) being connected to the sealing cavity; A driving mechanism is used to squeeze the leather cup and deform it in the axial direction. The upper cover (10) and the upper valve plate (22) form an inlet channel and an outlet channel, and an air inlet (13) is provided on the upper cover (10), which is connected to the inlet channel; A plug (50) and a filter (60) are provided on the liquid outlet channel. The plug (50) is provided with multiple sets of small holes, and the filter (60) is stacked together and arranged sequentially along the liquid outlet direction of the liquid outlet channel.

2. The foam-type diaphragm pump according to claim 1, characterized in that: The upper cover (10) is provided with a first chamber (14) and a second chamber (15). The first chamber (14) and the upper valve plate (22) form an inlet channel, and the second chamber (15) and the upper valve plate (22) form an outlet channel. The plug (50) and the filter screen (60) are installed in the second chamber (15).

3. The foam-type diaphragm pump according to claim 1, characterized in that: The first chamber (14) is located around the second chamber (15).

4. The foam-type diaphragm pump according to claim 2, characterized in that: The plug (50) is generally rectangular frame structure, and the multiple sets of small holes are arranged in an array at the bottom of the plug (50). The filter body (60) is generally rectangular sheet and covers the opening of the plug (50).

5. The foam-type diaphragm pump according to claim 1, characterized in that: The cup (40) is provided in multiple sets along the circumferential direction of the pump body (20). The upper valve plate (22) and the lower valve plate (23) are provided with multiple liquid inlet holes and liquid outlet holes. The liquid inlet holes are connected to the liquid inlet channel and the sealing cavity, and the liquid outlet holes are connected to the liquid outlet channel and the sealing cavity. The cup mouth of the cup (40) abuts against the lower valve plate (23) and the liquid inlet holes and liquid outlet holes are located inside the cup mouth. The cup (40) forms a sealing cavity.

6. The foam-type diaphragm pump according to claim 5, characterized in that: The leather bowl (40) is provided in four sets.

7. The foam-type diaphragm pump according to claim 5, characterized in that: The valve plate (30) is provided with multiple sets of first flexible sealing plates (31) and second flexible sealing plates (32). The first flexible sealing sheet (31) and the liquid inlet hole on the upper valve plate (22) form a sealing or separation fit; The second flexible sealing sheet (32) and the liquid outlet hole on the lower valve plate (23) form a sealing or separation fit.

8. The foam-type diaphragm pump according to claim 5, characterized in that: The liquid inlet is opened near the edge of the upper valve plate (22) and the lower valve plate (23), and the liquid outlet is opened near the center of the upper valve plate (22) and the lower valve plate (23).

9. The foam-type diaphragm pump according to claim 1, characterized in that: The drive mechanism includes: A drive motor (70) is provided, and the output end of the drive motor (70) is connected to the diaphragm cup (40) via a connecting assembly. Bottom cover (80), one end of the bottom cover (80) is connected to the drive motor (70), the other end of the bottom cover (80) is connected to one end of the cylinder (21), and the connecting component is located inside the bottom cover (80).

10. The foam-type diaphragm pump according to claim 9, characterized in that: The connection component includes: A display stand (71) is connected to one end of the leather bowl (40); A connecting shaft (72) is provided, one end of which is connected to the middle of the swing frame (71); An eccentric wheel (73) is connected to the output end of the drive motor (70).

Images