High durability diaphragm for diaphragm pump and diaphragm pump

Abstract

The application discloses a high-durability diaphragm piece and a diaphragm pump for the diaphragm pump, and belongs to the technical field of pump body equipment. The diaphragm piece comprises a diaphragm and a fixing ring. The diaphragm is circular or quasi-circular, and comprises an outer layer, a middle layer and an inner layer which are sequentially attached. The fixing ring is arranged in the circumferential direction of the diaphragm, is connected with the outer layer and protrudes towards the inner layer of the diaphragm, and the diaphragm and the fixing ring form a C-shaped disc-shaped structure. The diaphragm piece provided by the application can provide an elastic allowance for the diaphragm and disperse the impact force received by the diaphragm, so that the risk of diaphragm damage is reduced, the durability of the diaphragm piece is improved, and the production cost is reduced and the safety of the diaphragm pump is improved.

Description

Technical Field

[0001] This application relates to a high-durability diaphragm component and a diaphragm pump for use in diaphragm pumps, belonging to the field of pump body equipment technology. Background Technology

[0002] A diaphragm pump is a pump that achieves fluid flow through the reciprocating motion of a diaphragm. Diaphragm pumps have excellent self-priming capabilities and can handle high-viscosity liquids. They can operate without fluid without damage and are widely used in chemical, pharmaceutical, semiconductor, food processing, wastewater treatment, mining, and many other industrial fields. The design and operation of diaphragm pumps make them versatile and reliable fluid handling devices, especially suitable for applications with special requirements for pump sealing and safety.

[0003] However, the core performance of diaphragm pumps is also limited by the elastic diaphragm component. This is because the high-cycle fatigue caused by the long-term operation of the diaphragm often results in a diaphragm lifespan that is shorter than the designed service life of the diaphragm pump. Once the diaphragm ruptures, the fluid being pumped inside will come into direct contact with the actuation mechanism, damaging the diaphragm pump and causing pollution, resulting in serious economic losses.

[0004] Existing diaphragms are treated with a composite of polymer plastics and rubber materials, but this method cannot provide sufficient stress support and does not adequately improve the durability of the diaphragm. Utility Model Content

[0005] To address the aforementioned issues, this application proposes a high-durability diaphragm component and diaphragm pump for use in diaphragm pumps. By setting multiple layers of diaphragms and retaining rings, and by defining the characteristics of each diaphragm layer and the structure of the retaining rings, the mechanical properties of the diaphragm are improved, the stress condition of the diaphragm component is enhanced, and the diaphragm component exhibits high durability.

[0006] According to one aspect of this application, a high-durability diaphragm component for a diaphragm pump is provided, the diaphragm component comprising a diaphragm sheet and a retaining ring; The membrane is circular or nearly circular, and the membrane comprises an outer layer, a middle layer, and an inner layer that are sequentially bonded together. The fixing ring is disposed around the circumference of the diaphragm, the fixing ring is connected to the outer layer and protrudes towards the inner layer of the diaphragm, and the diaphragm and the fixing ring form a C-shaped disk structure.

[0007] Optionally, the outer layer is made of PTFE material, and the middle and inner layers are both made of rubber material.

[0008] Optionally, the outer layer has a plurality of protrusions on the side surface away from the middle layer, and the protrusions are hollow to form cavities.

[0009] Optionally, the protrusions are striped, arranged in two rows, and radially distributed along the upper and lower ends of the membrane.

[0010] Optionally, the middle layer rubber material is natural rubber or silicone rubber, and the middle layer and the outer layer are bonded together by adhesive.

[0011] Optionally, the adhesive is a series of evenly distributed but unconnected adhesive points between the outer layer and the middle layer.

[0012] Optionally, the inner layer of rubber material is provided with an elastic alloy strip, one end of which is located at the center of the inner layer and the other end is distributed radially along the diaphragm.

[0013] Optionally, the retaining ring is made of PTFE material and is integrally formed with the outer layer; The fixing ring is provided with several connecting holes for fixing the diaphragm component.

[0014] Optionally, the outer periphery of the middle layer and the inner layer contacts and is bonded to the fixing ring.

[0015] Optionally, the diaphragm further includes a rubber layer disposed on the side of the connection hole away from the inner layer.

[0016] According to another aspect of this application, a diaphragm pump is provided, comprising: A base, wherein a plurality of columns are fixedly connected to the upper surface of the base, and a pump body is fixedly connected to the upper end of the columns; A central shaft column is installed in the pump body and located in the middle of the pump body. Grooves are provided on both sides of the central shaft column, and the grooves are located in the middle of the central shaft column in the vertical direction. The pipes are arranged on both sides of the central column. The lower end of the pipes is provided with a fluid inlet, which is connected to the inlet pipe. The upper end of the pipes is provided with a fluid outlet, which is connected to the outlet pipe. A check valve is provided inside the pipes. A diaphragm component, which is fixedly connected to the central column, and the groove and the diaphragm component form a diaphragm chamber; A connecting rod is provided between the diaphragm components; The diaphragm component is the aforementioned diaphragm component; the groove has fixing grooves at both the upper and lower ends, and the fixing point with the diaphragm component is shaped to fit the outer periphery of the diaphragm component.

[0017] The beneficial effects that this application may produce include, but are not limited to: 1. A high-durability diaphragm component for a diaphragm pump according to this application improves the durability of the diaphragm component by defining the overall shape of the diaphragm component, the material composition of the diaphragm sheet, and the material characteristics of each layer, thereby dispersing internal and external impacts, providing elastic margin, and increasing mechanical strength.

[0018] 2. A high-durability diaphragm component for a diaphragm pump according to this application enhances the mechanical strength of the diaphragm by setting multiple layers of materials, thereby having stronger impact resistance.

[0019] 3. A high-durability diaphragm component for a diaphragm pump according to this application, by setting an outer cavity protrusion that cooperates with the elastic alloy strip in the inner rubber material, disperses the impact from the fluid and braking components from inside and outside the diaphragm component, prevents the diaphragm from breaking due to stress concentration, and improves the durability of the diaphragm component.

[0020] 4. A high-durability diaphragm component for a diaphragm pump according to this application provides sufficient elasticity to the diaphragm through the protrusions of the outer layer and the non-connected bonding between the outer and middle layers, preventing tearing and damage and extending the service life of the diaphragm component. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a side cross-sectional view of the diaphragm component as described in the embodiments of this application; Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a front view schematic diagram of the diaphragm component involved in the embodiments of this application; Figure 4 This is a rear view schematic diagram of the inner rubber layer involved in the embodiments of this application; Figure 5 This is a schematic diagram of the diaphragm pump. Figure 6 for Figure 5 A magnified view of a portion of point B in the middle.

[0022] List of components and reference numerals: 1. Diaphragm component; 2. Diaphragm sheet; 3. Fixing ring; 4. Outer layer; 5. Middle layer; 6. Inner layer; 7. Protrusion; 8. Rubber layer; 9. Alloy strip; 10. Diaphragm pump; 11. Check valve; 12. Fixing groove. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0025] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, in the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0029] refer to Figures 1-4The embodiments of this application disclose a high-durability diaphragm component 1 for a diaphragm pump 10, comprising: a diaphragm 2 and a retaining ring 3; the diaphragm 2 is circular or nearly circular, and the diaphragm 2 includes an outer layer 4, a middle layer 5 and an inner layer 6 that are sequentially bonded together; the retaining ring 3 is disposed in the circumference of the diaphragm 2, the retaining ring 3 is connected to the outer layer 4 and protrudes 7 toward the inner layer 6 of the diaphragm 2, and the diaphragm 2 and the retaining ring 3 form a C-shaped disk structure.

[0030] The multilayer diaphragm 2 structure enhances the mechanical strength of the diaphragm 2, providing better impact resistance and thus reducing the risk of damage from long-term use; the C-shaped disc structure can achieve an interference fit with the fixed part to prevent corrosive liquids from seeping in and eroding the inside of the diaphragm 1.

[0031] Specifically, when the fixing ring 3 is connected to the outer layer 4, the fixing ring 3 can be bonded to the middle layer 5 and the inner layer 6. When bonded, the integrity of the membrane is higher and the risk of interlayer separation is lower; or it can be abutted. When abutted, the middle layer 5 and the inner layer 6 will not hinder the movement of the fixing ring 3.

[0032] In one implementation, the outer layer 4 is made of PTFE material, while the middle layer 5 and the inner layer 6 are both made of rubber material.

[0033] Pure PTFE material has the properties of resistance to acids, alkalis and organic solvents, preventing the corrosion of the transported liquid; the middle layer 5 and the inner layer 6 are both made of rubber material, which can not only increase the resilience of the diaphragm 1, but also buffer the impact on the diaphragm 1 inside, preventing the outer layer 4 from cracking due to sudden stress, and extending the service life.

[0034] In one embodiment, the outer layer 4 has a plurality of protrusions 7 on the side surface away from the middle layer 5, and the protrusions 7 are hollow to form cavities.

[0035] The protrusions 7 on the surface of the outer layer 4 can reduce the impact of the fluid transported on the diaphragm 1, and provide stretching allowance for the material of the outer layer 4, thereby reducing or avoiding tearing and damage to the diaphragm 1.

[0036] In one embodiment, the protrusions 7 are striped, arranged in two rows, and radially distributed along the upper and lower ends of the diaphragm 2.

[0037] Since the strongest stress in a circular or near-circular elastic material is concentrated in the circumferential stress at the center and circumference when elastic deformation occurs, the striped protrusions 7 in this arrangement provide a greater elastic margin at the center and circumference, avoiding local tearing caused by stress concentration.

[0038] In one implementation, the rubber material of the middle layer 5 is natural rubber or silicone rubber, and the middle layer 5 is bonded to the outer layer 4 by adhesive.

[0039] In one implementation, the adhesive is a uniformly distributed but unconnected adhesive point between the outer layer 4 and the middle layer 5.

[0040] The elastic modulus of PTFE and rubber materials are different. The non-connected uniform bonding points can provide flexible deformation allowance, prevent diaphragm damage caused by the inconsistency of the expansion and contraction between the two materials, thereby extending the service life of diaphragm component 1, avoiding downtime for maintenance, reducing unit usage costs, ensuring normal operation and thus ensuring the continuity of industrial production.

[0041] In one embodiment, an elastic alloy strip 9 is provided in the rubber material of the inner layer 6. One end of the elastic alloy strip 9 is located at the center of the inner layer 6, and the other end is distributed radially along the diaphragm 2.

[0042] Using a more rigid alloy as the composite material for the inner layer 6 rubber allows the impact on the diaphragm 1 to be transmitted to the diaphragm 2, resulting in a more uniform stress distribution and preventing damage caused by excessive local stress on the diaphragm 2.

[0043] The elastic alloy strip 9 can deform along with the diaphragm 2 as a whole, including but not limited to Fe-based high elastic alloys, Co-based high elastic alloys, and Nb-based high elastic alloys.

[0044] In one implementation, the retaining ring 3 is made of PTFE material and is integrally formed with the outer layer 4; the outer periphery of the middle layer 5 and the inner layer 6 are in contact with and bonded to the retaining ring 3.

[0045] The one-piece molded outer layer 4 structure can effectively prevent fluid intrusion or penetration from causing dissolution or corrosion of the rubber material and the generation of bacterial colonies, thereby preventing contamination of the transported fluid.

[0046] In one embodiment, the fixing ring 3 is provided with several connecting holes for fixing the diaphragm 1.

[0047] Those skilled in the art will understand that the connection hole can be fixedly connected to the mating part of the diaphragm pump 10 pump body by fasteners.

[0048] In one embodiment, the diaphragm 1 further includes a rubber layer 8, which is disposed on the side of the connection hole away from the inner layer 6.

[0049] The fixing ring 3 and the fixing point are in contact between two more rigid materials. The setting of the rubber layer 8 provides higher elasticity for the fixing of the diaphragm 1. On the one hand, it can reduce the interaction force of the low elasticity material in short-distance reciprocating collision. On the other hand, it can also prevent the fixing from loosening and falling off due to vibration.

[0050] Example 2 refer to Figures 5-6 This embodiment discloses a diaphragm pump 10, comprising: The base has several columns fixedly connected to its upper surface, and the pump body is fixedly connected to the upper end of each column. The central shaft is installed in the pump body and located in the middle of the pump body. Grooves are provided on both sides of the central shaft, and the grooves are located in the middle of the central shaft in the vertical direction. The pipeline is located on both sides of the central column. The lower end of the pipeline has a fluid inlet that is connected to the inlet pipe, and the upper end of the pipeline has a fluid outlet that is connected to the outlet pipe. A check valve 11 is installed inside the pipeline. Diaphragm component 1 is fixedly connected to the central shaft column, and the groove and diaphragm component 1 form a diaphragm chamber; A connecting rod is provided between the diaphragm components 1; The diaphragm 1 is the diaphragm 1 of the above embodiment 1; the groove has a fixing groove 12 at both the upper and lower ends, and the fixing part with the diaphragm 1 has a shape that matches the outer periphery of the diaphragm 1.

[0051] In this design, the diaphragm pump 10 can be driven by a gas source or an electric source. Under the action of power, one diaphragm 1 expands outward, the volume of the pipe on that side decreases and the pressure increases, the check valve 11 opens and the fluid flows through; the other diaphragm 1 expands inward, the volume of the pipe on the same side increases and the pressure decreases, the check valve 11 closes and the flow is stopped; under the power control, the two diaphragm 1 expand and contract alternately, and the fluid passes through the two pipes alternately to realize the fluid transport; during this process, the diaphragm 1 is limited by the fixing ring 3 and the fixing groove 12 and does not undergo obvious displacement, but the fluid transport power is provided by the inward and outward expansion of the diaphragm 2; during this process, the outer layer 4 of the diaphragm 2 has high impact resistance and durability under the support and buffer of the middle layer 5 and the inner layer 6, thus increasing its service life.

[0052] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0053] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A high-durability diaphragm component for a diaphragm pump, characterized in that, The diaphragm component includes a diaphragm and a retaining ring; The membrane is circular or nearly circular, and the membrane comprises an outer layer, a middle layer, and an inner layer that are sequentially bonded together. The fixing ring is disposed around the circumference of the diaphragm, the fixing ring is connected to the outer layer and protrudes towards the inner layer of the diaphragm, and the diaphragm and the fixing ring form a C-shaped disk structure.

2. The high-durability diaphragm component according to claim 1, characterized in that, The outer layer is made of PTFE material, while the middle and inner layers are both made of rubber material.

3. The high-durability diaphragm component according to claim 1, characterized in that, The outer layer has several protrusions on the side of the outer layer away from the middle layer, and the protrusions are hollow to form cavities.

4. The high-durability diaphragm component according to claim 3, characterized in that, The protrusions are striped, arranged in two rows, and radially distributed along the upper and lower ends of the membrane.

5. The high-durability diaphragm component according to claim 2, characterized in that, The middle layer rubber material is natural rubber or silicone rubber, and the middle layer is bonded to the outer layer by adhesive.

6. The high-durability diaphragm component according to claim 5, characterized in that, The adhesion refers to uniformly distributed but unconnected adhesive points between the outer and middle layers.

7. The high-durability diaphragm component according to claim 2, characterized in that, An elastic alloy strip is provided in the rubber material of the inner layer. One end of the elastic alloy strip is located at the center of the inner layer, and the other end is distributed radially along the diaphragm.

8. The high-durability diaphragm component according to claim 1, characterized in that, The retaining ring is made of PTFE material, and the retaining ring is integrally formed with the outer layer; The fixing ring is provided with a plurality of connecting holes, which are used to fix the diaphragm component.

9. The high-durability diaphragm component according to claim 1, characterized in that, The diaphragm also includes a rubber layer disposed on the side of the connection hole away from the inner layer.

10. A diaphragm pump, characterized in that, include: A base, wherein a plurality of columns are fixedly connected to the upper surface of the base, and a pump body is fixedly connected to the upper end of the columns; A central shaft column is installed in the pump body and located in the middle of the pump body. Grooves are provided on both sides of the central shaft column, and the grooves are located in the middle of the central shaft column in the vertical direction. The pipes are arranged on both sides of the central column. The lower end of the pipes is provided with a fluid inlet, which is connected to the inlet pipe. The upper end of the pipes is provided with a fluid outlet, which is connected to the outlet pipe. A check valve is provided inside the pipes. A diaphragm component, which is fixedly connected to the central column, and the groove and the diaphragm component form a diaphragm chamber; A connecting rod is provided between the diaphragm components; The diaphragm is the diaphragm as described in any one of claims 1 to 9; the groove has fixing grooves at both ends, and the fixing point with the diaphragm has a shape that matches the outer periphery of the diaphragm.

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