Diaphragm structure and diaphragm pump

Abstract

The utility model provides a diaphragm structure and a diaphragm pump, which belong to the technical field of fluid transmission, the diaphragm structure comprises a connecting piece, the connecting piece comprises a first connecting part, the first connecting part comprises a mounting surface and a connecting surface which are oppositely arranged, the connecting surface is provided with a connecting concave part, and the mounting surface is provided with a mounting part; the diaphragm piece comprises a connecting base, a connecting cavity is formed in the connecting base, and the surface of the first connecting piece is connected with the cavity wall of the connecting cavity; the connecting seat has the advantages that the connecting concave part is designed on the connecting surface, and the contact area between the connecting surface and the connecting seat is increased due to the existence of the connecting concave part, so that firmer connection is realized, and the loosening or damage risk caused by high pressure or frequent operation is reduced; the multiple circles of connecting grooves are coaxially arranged, and the concentric arrangement of the connecting grooves enables the stress of the connecting surfaces to be more uniform, so that local stress concentration is avoided; and the effect similar to gear meshing is achieved through the multiple circles of grooves, radial sliding or twisting of the diaphragm piece and the connecting piece is prevented through physical clamping, and the loosening risk is reduced.

Description

Technical Field

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

[0002] Diaphragm pumps are widely used in various industries as important fluid transfer devices. Their unique design makes them excellent in handling corrosive, viscous liquids, liquids containing solid particles, and in applications requiring high sealing and precise flow control. However, existing diaphragm pump designs still have some shortcomings that limit their efficiency and reliability in a wider range of applications.

[0003] In existing diaphragm pump designs, the limited contact area between the connector and the diaphragm directly affects the connection strength and sealing performance. Especially in high-pressure or high-frequency vibration environments, this limited contact area can easily lead to loosening or even damage at the connection points, resulting in leaks or other malfunctions. For example, in the chemical industry handling highly corrosive media, even a small leak can cause serious environmental pollution and safety hazards. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a diaphragm structure that increases the contact area between the connector and the diaphragm, resulting in a more reliable connection.

[0005] The objective of this utility model can be achieved through the following technical solution: a diaphragm structure, comprising:

[0006] A connector, the connector including a first connecting part, the first connecting part including a mounting surface and a connecting surface disposed opposite to each other, the connecting surface being provided with a connecting recess, and the mounting surface being provided with a mounting part;

[0007] A diaphragm sheet, the diaphragm sheet including a connecting seat, the connecting seat being provided with a connecting cavity, and the surface of the first connecting member being connected to the cavity wall of the connecting cavity.

[0008] In one of the diaphragm structures described above, the connecting recess includes multiple ring-shaped connecting grooves disposed on the connecting surface, and the multiple ring-shaped connecting grooves are coaxially arranged.

[0009] In one of the diaphragm structures described above, the connector further includes a second connecting portion, which is fixed to the first connecting portion, and there is a gap between the second connecting portion and the first connecting portion to form an annular groove. The mounting portion is located on the second connecting portion. The second connecting portion is also located inside the connecting cavity, and the surface of the second connecting portion is connected to the cavity wall of the connecting cavity.

[0010] In one of the diaphragm structures described above, the diaphragm includes a first diaphragm layer and a second diaphragm layer that are fixedly connected, and the connecting seat is disposed on the second diaphragm layer.

[0011] In one of the diaphragm structures described above, an operating part is provided on the mounting part, and the operating part is an external hexagonal screw head.

[0012] In one of the diaphragm structures described above, the outer surface of the connecting seat has multiple reinforcing ribs spaced in a ring.

[0013] In one of the diaphragm structures described above, the side of the diaphragm with the connecting seat is provided with multiple ring-shaped deformable recesses, and the multiple rings of deformable recesses are coaxially arranged.

[0014] In one of the diaphragm structures described above, a deformable concave ring is provided on one side of the diaphragm where a connecting seat is provided. The deformable concave ring is arranged around the connecting seat, and a connecting rib is provided inside the deformable concave ring. The two sides of the connecting rib are provided with arc-shaped surfaces that are connected to the inner concave surface of the deformable concave ring.

[0015] In one of the diaphragm structures described above, the inner ring wall of the deformable concave ring near the connecting seat is an elliptical arc surface.

[0016] A diaphragm pump includes the diaphragm structure described above, and also includes a pump body and a drive component. The diaphragm structure is located within the pump body. A disassembly port is provided on the side of the pump body. A sealing plate is detachably provided on the pump body and covers the disassembly port. The disassembly port and the drive component are disposed opposite to each other on both sides of the diaphragm structure.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) A connecting recess is designed on the connecting surface. The presence of the connecting recess increases the contact area between the connecting surface and the connecting seat, thereby achieving a more secure connection and reducing the risk of loosening or damage caused by high pressure or frequent operation.

[0019] (2) The coaxial arrangement of multiple connecting grooves makes the force on the connecting surface more uniform, avoiding local stress concentration (such as cracks or deformation caused by single-point force), which is especially suitable for high-pressure or high-frequency vibration environments; and the multiple grooves form a similar effect to "gear meshing", which prevents the diaphragm and the connector from sliding or twisting radially through physical locking, reducing the risk of loosening. Attached Figure Description

[0020] Figure 1 This is one of the three-dimensional structural diagrams of a diaphragm structure;

[0021] Figure 2 yes Figure 1A three-dimensional structural diagram of the connecting component;

[0022] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0023] Figure 4 yes Figure 1 A three-dimensional structural diagram of the diaphragm.

[0024] Figure 5 This is the second schematic diagram of the three-dimensional structure of the diaphragm;

[0025] Figure 6 This is a three-dimensional structural diagram of a diaphragm pump;

[0026] Figure 7 This is an exploded structural diagram of the pump body and the sealing plate;

[0027] Figure 8 This is a schematic diagram of the cross-sectional structure of the pump body;

[0028] Figure 9 This is a schematic diagram of the three-dimensional structure of the valve plate;

[0029] Figure 10 yes Figure 6 A schematic diagram of the cross-sectional structure;

[0030] Figure 11 This is a three-dimensional structural diagram of a diaphragm sheet from another design.

[0031] In the figure, 100 is the connector; 101 is the first connecting part; 102 is the mounting surface; 103 is the connecting surface; 104 is the connecting recess; 105 is the mounting part; 106 is the second connecting part; 107 is the operating part; 200 is the diaphragm; 201 is the connecting seat; 202 is the connecting cavity; 203 is the first diaphragm layer; 204 is the second diaphragm layer; 205 is the deformable recess; 206 is the reinforcing rib; 207 is the deformable concave ring; 208 is the connecting rib; 209 is the arc-shaped part; 210 is the elliptical arc surface; 300 is the pump body; 301 is the driving component; 302 is the disassembly port; 303 is the sealing plate; 304 is the mounting plate; 305 is the non-removable screw; 306 is the valve plate; 307 is the eccentric wheel structure; 308 is the cooling fan; 309 is the connecting part; 310 is the transmission part; 311 is the set screw; and 312 is the mounting seat. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] like Figures 1-9 As shown, a membrane structure includes:

[0035] The connector 100 includes a first connecting part 101, which includes a mounting surface 102 and a connecting surface 103 disposed opposite to each other. A connecting recess 104 is provided on the connecting surface 103, and a mounting part 105 is provided on the mounting surface 102.

[0036] The diaphragm 200 includes a connecting seat 201, on which a connecting cavity 202 is provided, and the surface of the first connecting part 101 is connected to the cavity wall of the connecting cavity 202.

[0037] In this embodiment, the connector 100 includes a first connecting portion 101, which has two opposing mounting surfaces 102 and connecting surfaces 103. The connecting surface 103 is designed with a connecting recess 104, while the mounting surface 102 is provided with a mounting portion 105. The mounting portion 105 is used to connect with the eccentric wheel structure 307 inside the pump body 300. The diaphragm 200 is provided with an integrally formed connecting seat 201, which has a connecting cavity 202 inside. The outer surface of the first connecting portion 101 is tightly fitted with the inner wall of the connecting cavity 202 on the diaphragm 200. The presence of the connecting recess 104 increases the contact area between the connecting surface 103 and the connecting seat 201, thereby achieving a more secure connection and reducing the risk of loosening or damage caused by high pressure or frequent operation.

[0038] like Figure 2 As shown, in a further preferred embodiment, the connecting recess 104 includes multiple ring-shaped connecting grooves disposed on the connecting surface 103, and the multiple ring connecting grooves are coaxially arranged. The concentric arrangement of the connecting grooves makes the force on the connecting surface 103 more uniform, avoiding local stress concentration (such as cracks or deformation caused by single-point force), which is especially suitable for high-pressure or high-frequency vibration environments. Moreover, the multiple ring grooves form a "gear meshing" effect, which prevents the diaphragm 200 and the connector 100 from radially sliding or twisting through physical locking, reducing the risk of loosening.

[0039] Specifically, the connector 100 also includes a second connecting part 106, which is fixed to the first connecting part 101, and there is a gap between the second connecting part 106 and the first connecting part 101 to form an annular groove. The mounting part 105 is located on the second connecting part 106. The second connecting part 106 is also located in the connecting cavity 202, and the surface of the second connecting part 106 is connected to the cavity wall of the connecting cavity 202.

[0040] In this embodiment, the second connecting part 106 is also located in the connecting cavity 202 of the diaphragm 200, and its surface is also closely attached to the cavity wall of the connecting cavity 202. The presence of the second connecting part 106 further increases the connection area with the diaphragm 200 and improves the firmness of the connection. Moreover, there is a gap between the first connecting part 101 and the second connecting part 106. The cavity wall of the connecting cavity 202 extends into the gap to prevent the diaphragm 200 from moving axially relative to the connector 100 and keep their relative positions unchanged.

[0041] like Figure 1 , Figure 3 As shown, in a further preferred embodiment, the diaphragm 200 includes a first diaphragm layer 203 and a second diaphragm layer 204 fixedly connected, and the connecting seat 201 is disposed on the second diaphragm layer 204.

[0042] In this embodiment, the materials of the first membrane layer 203 and the second membrane layer 204 can be selected according to actual usage requirements. As an optional solution, in this application, the material of the second membrane layer 204 is EPDM, while the material of the first membrane layer 203 is PTFE, and the thickness of the first membrane layer 203 is less than the thickness of the second membrane layer 204.

[0043] The first diaphragm layer 203 is in direct contact with the fluid medium, therefore it needs to have excellent corrosion resistance and chemical stability. Therefore, in this application, polytetrafluoroethylene (PTFE) is selected as the material of the first diaphragm layer 203. PTFE has excellent corrosion resistance, low coefficient of friction and a wide operating temperature range. The second diaphragm layer 204 is mainly responsible for providing mechanical strength and support. In this application, ethylene propylene diene monomer (EPDM) rubber is selected as the material of the second diaphragm layer 204. EPDM has good elasticity, wear resistance and weather resistance, can effectively absorb vibration and maintain its physical properties over a wide temperature range.

[0044] In a further preferred embodiment, the mounting part 105 is provided with an operating part 107, which is an external hexagonal screw head. The design of the external hexagonal screw head makes the installation and disassembly process of the diaphragm 200 and the eccentric wheel structure 307 very simple and quick, reducing maintenance time and improving work efficiency. Moreover, the presence of the external hexagonal screw head means that the operation can be completed using standard tools without the need for special customized tools, which reduces the difficulty of operation and improves the flexibility of on-site operation.

[0045] In a further preferred embodiment, the outer surface of the connector 201 has multiple reinforcing ribs 206 spaced in a ring to enhance the mechanical strength and rigidity of the connector 201 and prevent deformation or damage under high pressure or high frequency vibration.

[0046] More preferably, the side of the diaphragm 200 where the connecting seat 201 is provided has multiple ring-shaped deformable recesses 205, and the multiple ring-shaped deformable recesses 205 are coaxially arranged.

[0047] In this embodiment, the deformable recess 205 is located on the second diaphragm layer 204, while the surface of the first diaphragm layer 203 is a smooth surface. The deformable recess 205 includes a deformable groove provided on the second diaphragm layer 204. The first diaphragm layer 203 is in direct contact with the fluid medium. The smooth surface design ensures low flow resistance during fluid transmission and avoids particle residue or contamination problems caused by surface roughness. The second diaphragm layer 204 is responsible for providing mechanical strength and support. Multiple ring-shaped deformable recesses 205 are provided on the bottom surface of the second diaphragm layer 204 (i.e., the side away from the first diaphragm layer 203), which can enhance the elastic deformation capability of the diaphragm 200 and enable it to better adapt to pressure changes during the pumping process.

[0048] It should be noted that multiple ribs are provided at intervals around the circumference of the deformable recess 205.

[0049] like Figure 11 As shown, as another alternative, a deformable concave ring 207 is provided on one side of the diaphragm sheet 200 where the connecting seat 201 is provided. The deformable concave ring 207 is arranged around the connecting seat 210, and a connecting rib 208 is provided inside the deformable concave ring 207. The two sides of the connecting rib 208 are provided with arc-shaped surfaces 209 that are connected to the concave surfaces of the deformable concave ring 207.

[0050] More preferably, the inner ring wall of the deformable concave ring 207 near the connecting seat 201 is an elliptical arc surface 210.

[0051] In this embodiment, the deformable concave ring 207 is arranged around the connecting seat 201, which allows the diaphragm 200 to undergo more flexible elastic deformation during operation, helping to disperse stress and avoid fatigue damage or crack formation caused by local stress concentration. The connecting ribs 208 arranged inside the deformable concave ring 207 not only enhance the overall rigidity of the diaphragm 200, but also provide additional support points to prevent the deformable concave ring 205 from excessive deformation or breakage under high pressure conditions. The arc-shaped surfaces 209 arranged on both sides of the connecting ribs 208 are connected to the concave surfaces of the deformable concave ring 207, further optimizing the stress distribution and improving the stability and durability of the structure.

[0052] The inner ring wall of the deformable concave ring 207 near the connecting seat 201 is designed with an elliptical arc surface 210. This design makes the stress distribution more uniform and reduces the possibility of stress concentration. The elliptical arc surface 210 can provide a smoother transition in different directions, reducing the risk of material fatigue caused by stress concentration, thereby improving the reliability and durability of the diaphragm 200.

[0053] like Figures 6-9 As shown, a diaphragm pump includes a diaphragm structure, a pump body 300, and a drive unit 301. The diaphragm structure is located inside the pump body 300. A disassembly port 302 is provided on the side of the pump body 300. A sealing plate 303 is detachably provided on the pump body 300 to cover the disassembly port 302. The disassembly port 302 and the drive unit 301 are disposed opposite to each other on both sides of the diaphragm structure.

[0054] In this embodiment, the traditional disassembly port 302 located on the side of the pump body 300 is changed to the front (opposite to the drive component 301). This improves the convenience of maintenance and component installation, especially for the installation of key components such as the eccentric wheel structure 307. The open view from the front makes the operation more intuitive and convenient. Moreover, the presence of the disassembly port 302 at the front makes it easier for maintenance personnel to access the internal components of the pump, facilitating the inspection, cleaning, and replacement of damaged or aging components.

[0055] like Figure 10 As shown, it is worth mentioning that the eccentric wheel in the eccentric wheel structure 307 includes an integrally formed connecting part 309 and a transmission part 310. Both the connecting part 309 and the transmission part 310 are sleeved on the drive shaft of the drive member 301. The set screw 311 passes through the connecting part 309 and is fixed to the drive shaft, while the transmission part 310 extends into the inner ring of the transmission bearing in the eccentric wheel structure 307 to transmit power.

[0056] Specifically, the drive unit 301 includes a shaded-pole motor, which is a single-phase induction motor. It is characterized by its simple structure, lack of need for starting capacitors or switches, good self-starting performance, and low cost, providing a stable power source for the diaphragm pump and reducing the possibility of failure.

[0057] A further preferred embodiment includes a mounting plate 304, on which the pump body 300 and the drive component 301 are both fixed. The mounting plate 304 is provided with multiple non-removable screws 305.

[0058] In this embodiment, the mounting plate 304 serves as a common support platform for the pump body 300 and the drive component 301, ensuring that the relative position between the two is accurate and stable. Multiple non-loosening screws 305 (also known as anti-loosening screws or locking screws) are provided on the mounting plate 304. These screws have a special structural design that can maintain a firm connection under vibration or other dynamic conditions, preventing failures caused by loosening.

[0059] It is worth mentioning that the mounting plate 305 is provided with a mounting base 312, the drive component 301 is fixed to the mounting base 312, and the drive shaft of the drive component 301 passes through the mounting base 312 and extends into the pump body 300, increasing the durability of the diaphragm pump; the drive component 301 is also provided with a cooling fan 308, which can accelerate airflow and help the drive component 301 dissipate heat quickly.

[0060] like Figure 8 , Figure 9 As shown, in a further preferred embodiment, a valve plate 306 is provided inside the pump body 300, and the valve plate 306 is made of stainless steel or PTEE.

[0061] In this embodiment, the valve plate 306, made of stainless steel and manufactured by etching process, has high mechanical strength and good corrosion resistance. The etching process can realize complex geometric design, improving the working efficiency and sealing performance of the valve plate 306. The valve plate 306 made of PTEE material is known for its excellent chemical stability and low coefficient of friction, making it particularly suitable for handling corrosive media or applications requiring high sealing performance.

[0062] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0064] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A diaphragm structure, characterized in that, include: A connector, the connector including a first connecting part, the first connecting part including a mounting surface and a connecting surface disposed opposite to each other, the connecting surface being provided with a connecting recess, and the mounting surface being provided with a mounting part; A diaphragm sheet, the diaphragm sheet including a connecting seat, the connecting seat being provided with a connecting cavity, and the surface of the first connecting part being connected to the cavity wall of the connecting cavity.

2. The diaphragm structure according to claim 1, characterized in that, The connecting recess includes multiple ring-shaped connecting grooves disposed on the connecting surface, and the multiple rings of connecting grooves are coaxially arranged.

3. The diaphragm structure according to claim 1, characterized in that, The connector further includes a second connecting part, which is fixed to the first connecting part, and there is a gap between the second connecting part and the first connecting part to form an annular groove. The mounting part is located on the second connecting part. The second connecting part is also located inside the connecting cavity, and the surface of the second connecting part is connected to the cavity wall of the connecting cavity.

4. A diaphragm structure according to claim 1, characterized in that, The diaphragm includes a first diaphragm layer and a second diaphragm layer that are fixedly connected, and the connecting seat is disposed on the second diaphragm layer.

5. A diaphragm structure according to claim 1, characterized in that, The mounting part is provided with an operating part, which is an external hexagonal screw head.

6. A diaphragm structure according to claim 1, characterized in that, The outer surface of the connector has multiple reinforcing ribs spaced in a ring.

7. A diaphragm structure according to claim 1, characterized in that, The diaphragm sheet has a connecting seat on one side, which has multiple ring-shaped deformable recesses, and the multiple rings of deformable recesses are coaxially arranged.

8. A diaphragm structure according to claim 1, characterized in that, The diaphragm sheet has a deformable concave ring on one side where the connecting seat is located. The deformable concave ring surrounds the connecting seat and has a connecting rib inside. The two sides of the connecting rib have arc-shaped surfaces that connect with the inner concave surface of the deformable concave ring.

9. A diaphragm structure according to claim 8, characterized in that, The inner ring wall of the deformable concave ring near the connecting seat is an elliptical arc surface.

10. A diaphragm pump, characterized in that, The pump body includes a diaphragm structure as described in any one of claims 1-9, and further includes a pump body and a drive unit. The diaphragm structure is located inside the pump body. A disassembly port is provided on the side of the pump body. A sealing plate is detachably provided on the pump body and covers the disassembly port. The disassembly port and the drive unit are disposed opposite to each other on both sides of the diaphragm structure.

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