A diaphragm pump comprising a diaphragm member having a double-layer structure

Abstract

The application discloses a diaphragm pump containing a diaphragm piece with a double-layer structure and belongs to the technical field of diaphragm pumps. The diaphragm pump comprises a base, a pump body, a straight rod, diaphragm pieces and a driving device, the pump body is fixedly connected to the upper end of the base, the inside of the pump body is provided with two opposite pump cavities, a channel is arranged between the two pump cavities, each pump cavity is communicated with one liquid inlet pipe and one liquid outlet pipe, a one-way valve is arranged in the liquid inlet pipe, and the straight rod is slidably connected with the channel; the two diaphragm pieces are fixedly connected to the two ends of the straight rod, the diaphragm pieces are arranged in the pump cavities, the diaphragm piece comprises a first piece body and a second piece body which are attached to each other, the first piece body is fixedly connected with the straight rod, and the edge of the first piece body is fixedly connected with the side of the pump cavity close to the channel. The diaphragm piece is formed by fixedly connecting the first piece body and the second piece body, the stability of the diaphragm piece is improved, and due to the existence of the double-layer diaphragm, even if the first piece body is broken, the second piece body can still work normally, and liquid leakage is prevented.

Description

Technical Field

[0001] This application relates to a diaphragm pump containing a double-layer diaphragm component, belonging to the field of diaphragm pump technology. Background Technology

[0002] In traditional diaphragm pumps, the diaphragm is mostly a single-layer diaphragm. During operation, the single-layer diaphragm is frequently subjected to alternating stress. After long-term use, the sealing performance of the single-layer diaphragm will gradually decline due to fatigue deformation, aging, and other reasons. At the same time, it will come into contact with various corrosive and abrasive media, which will accelerate the wear and corrosion of the diaphragm, leading to cracks, perforations, and other damage, shortening the diaphragm's service life, increasing maintenance costs and downtime. When conveying toxic, harmful, flammable, or explosive media, leakage will pose a serious threat to personnel safety and the environment.

[0003] In addition, the single-layer diaphragm structure is simple. When the diaphragm is damaged, the liquid will leak, which will directly affect the normal operation of the diaphragm pump. It is impossible to prevent failure in advance, which increases the difficulty of maintenance and production losses.

[0004] Chinese utility model patent CN222296465U discloses a silent pump, including a driver, a pump body, and a pump chamber. The driver is connected to one side of the pump body, and the pump chamber is connected to the other side of the pump body. The pump body includes a coupling, an eccentric shaft, an eccentric wheel, and a connecting rod assembly. One end of the coupling is connected to the driver, and the other end is connected to the eccentric shaft. The eccentric wheel is sleeved on the eccentric shaft to form an eccentric structure. One end of the connecting rod assembly is rotatably connected to the eccentric wheel, and the other end moves like a piston in the pump chamber to change the volume of the pump chamber. The eccentric wheel includes a rubber coating layer, which is disposed on the inner wall where the eccentric wheel contacts the connecting rod assembly. The coupling and the rubber coating layer can absorb vibrations during transmission, reduce the noise of the silent pump during operation, and fix the noise frequency of the silent pump, facilitating external noise reduction treatment. The diaphragm used in this patent is a one-piece diaphragm made of rubber material. During use, the diaphragm pump in this patent is prone to rupture because the diaphragm is only one layer, which affects the normal use of the diaphragm pump and damages the instrument once it ruptures. Utility Model Content

[0005] To address the aforementioned issues, this application provides a diaphragm pump with a double-layered diaphragm component. The diaphragm component is formed by a fixed connection between a first diaphragm and a second diaphragm, which improves the stability of the diaphragm component and reduces the probability of tearing or breakage during operation. Furthermore, due to the presence of the double-layered diaphragm, even if the first diaphragm, which is directly connected to the straight rod, breaks, the second diaphragm can still function normally, preventing liquid leakage. If the first diaphragm breaks, the diaphragm pump will produce abnormal noise during operation. After inspection, the diaphragm component can be replaced in a timely manner to prevent affecting the normal operation of the diaphragm pump.

[0006] This application provides a diaphragm pump containing a double-layer diaphragm element, comprising:

[0007] Base;

[0008] The pump body is fixedly connected to the upper end of the base. The pump body has two opposing pump chambers inside, and a channel is provided between the two pump chambers. Each pump chamber is connected to an inlet pipe and an outlet pipe. A one-way valve is provided in the inlet pipe.

[0009] A straight rod, which is slidably connected to the channel;

[0010] Two diaphragm components are fixedly connected to both ends of the straight rod. The diaphragm components are disposed in the pump chamber. Each diaphragm component includes a first sheet and a second sheet that are attached together. The first sheet is fixedly connected to the straight rod, and the edge of the first sheet is fixedly connected to the side of the pump chamber near the channel.

[0011] A drive device for driving the straight rod to reciprocate.

[0012] Optionally, the surfaces of the first sheet and the second sheet that are in contact with each other are provided with a plurality of grooves, and the surfaces of the second sheet and the first sheet that are in contact with each other are provided with protrusions that cooperate with the grooves.

[0013] Optionally, the diameter of the first piece and the second piece is both d, the diameter of the groove is a, a≤1 / 2d, and the diameter of the protrusion is b, b=a+1 / 300d.

[0014] Optionally, the first piece and the second piece are bonded together by an adhesive layer.

[0015] Optionally, the first sheet and the second sheet are made of rubber or fluoride.

[0016] Optionally, the straight rod is provided with discs at both ends, and the straight rod is fixedly connected to the first plate through the discs.

[0017] Optionally, the disk is provided with an extension strip in the circumferential direction, one end of the extension strip is fixedly connected to the disk, and the extension strip is connected to the surface of the first piece.

[0018] Optionally, the pump chamber is provided with a plurality of fixing holes on the side near the channel, the fixing holes being used to fix the diaphragm component.

[0019] Optionally, it also includes a shock-absorbing assembly connected to the lower part of the base. The shock-absorbing assembly includes an upper horizontal plate, a lower horizontal plate, and a plurality of shock-absorbing springs, which are evenly arranged between the upper horizontal plate and the lower horizontal plate.

[0020] Optionally, the diameter of the shock-absorbing spring is 1 / 8 to 1 / 2 of the length of the pump body, and the ratio of the height to the diameter of the shock-absorbing spring is 1:1.

[0021] Optionally, the upper horizontal plate and the base are detachably connected.

[0022] The beneficial effects that this application may produce include, but are not limited to:

[0023] 1. The diaphragm pump with a double-layer diaphragm structure provided in this application forms a diaphragm component by fixing the first diaphragm body and the second diaphragm body together, which improves the stability of the diaphragm component and reduces the probability of tearing or breakage during operation. At the same time, due to the presence of the double-layer diaphragm, even if the first diaphragm body, which is directly connected to the straight rod, breaks, the second diaphragm body can still work normally to prevent liquid leakage. If the first diaphragm body breaks, the diaphragm pump will make abnormal noise during operation. After inspection, the diaphragm component can be replaced in time to prevent it from affecting the normal operation of the diaphragm pump.

[0024] 2. The diaphragm pump with a double-layer diaphragm structure provided in this application can achieve a fixed connection between the first and second pieces by setting a number of grooves on the surface of the first piece and a number of protrusions that cooperate with the grooves on the surface of the second piece. Adhesive material can be added to the grooves to better fix the first and second pieces together. At the same time, the setting of grooves and protrusions can increase the adhesive area between the first and second pieces, thereby improving the connection stability between the two.

[0025] 3. The diaphragm pump with a double-layer diaphragm component provided in this application has a groove diameter on the first sheet smaller than the diameter of the protrusion on the second sheet. The groove and the protrusion are interference-fitted. The remaining positions of the first sheet and the second sheet are bonded together by adding adhesive material. The connection stability between the first sheet and the second sheet is improved by the combination of adhesive bonding and interference fit, making the diaphragm component more stable during the operation of the diaphragm pump.

[0026] 4. The diaphragm pump with a double-layer diaphragm component provided in this application has a disc on the straight rod. The disc can increase the contact area between the straight rod and the first diaphragm body, thereby improving the tightness of the connection between the first diaphragm body and the straight rod. At the same time, the increased contact area between the first diaphragm body and the straight rod can extend the service life of the diaphragm component in the pump body.

[0027] 5. The diaphragm pump with a double-layer diaphragm component provided in this application has an extension strip arranged circumferentially on the disc. The extension strip is fixedly connected to the non-adhesive surface of the first sheet. The addition of the extension strip can make the diaphragm component be subjected to uniform force, reduce the force at the connection between the disc and the first sheet, and improve the service life of the diaphragm component. Attached Figure Description

[0028] 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:

[0029] Figure 1 This is a schematic cross-sectional view of the diaphragm pump involved in the embodiments of this application;

[0030] Figure 2 This is a schematic diagram illustrating the adhesive connection between the diaphragm and the straight rod in an embodiment of this application.

[0031] Figure 3 This is a schematic diagram showing the connection between the diaphragm and the straight rod through a fixing member in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram illustrating the connection between the disk, the extension strip, and the first sheet body in an embodiment of this application;

[0033] List of components and reference numerals:

[0034] 10. Base; 20. Pump body; 21. Pump chamber; 22. Channel; 30. Straight rod; 31. Disc; 311. Extension strip; 40. Diaphragm component; 41. First piece; 411. Groove; 42. Second piece; 421. Protrusion; 50. Shock absorption assembly; 51. Upper horizontal plate; 52. Shock absorption spring; 53. Lower horizontal plate. Detailed Implementation

[0035] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] 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.

[0041] 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.

[0042] refer to Figure 1-3This application discloses a diaphragm pump with a double-layer diaphragm structure, comprising: a base 10; a pump body 20, which is fixedly connected to the upper end of the base 10, and has two opposing pump chambers 21 inside, with a channel 22 between the two pump chambers 21, each pump chamber 21 being connected to an inlet pipe (not shown in the figure) and an outlet pipe (not shown in the figure), and a one-way valve (not shown in the figure) is provided in the inlet pipe; a straight rod 30, which is slidably connected to the channel 22; two diaphragm members 40, which are fixedly connected to the two ends of the straight rod 30, and are disposed in the pump chambers 21, each diaphragm member 40 including a first sheet 41 and a second sheet 42 that fit together, the first sheet 41 being fixedly connected to the straight rod 30, and the edge of the first sheet 41 being fixedly connected to the side of the pump chamber 21 near the channel 22; and a driving device for driving the straight rod 30 to reciprocate.

[0043] The drive device of this application can be electric or pneumatic. When the drive device is electric, an eccentric shaft is added. By setting a through hole in the channel, the eccentric shaft is connected to the straight rod 30. An external motor drives the eccentric shaft to rotate. Due to the presence of the eccentric shaft, the rotary motion can be converted into reciprocating linear motion, realizing the reciprocating motion of the straight rod 30, which in turn drives the diaphragm 40 to reciprocate. When the diaphragm 40 moves away from the inside of the pump chamber 21 under the drive of the straight rod 30, the internal volume of the pump chamber 21 increases and the pressure decreases, which will promote... External liquid enters the fluid inlet through the inlet pipe and then into the pipeline. When the diaphragm enters the pump chamber 21 under the drive of the straight rod 30, the volume of the pump chamber 21 decreases and the pressure increases. Due to the presence of the one-way valve, the liquid in the pump chamber 21 can only enter the outlet pipe through the fluid outlet, thus completing the liquid transportation. Similarly, when the drive device is pneumatic, a valve body and control components are set to realize the reciprocating motion of the diaphragm 40. For the specific structure, please refer to patent CN103925200A.

[0044] In the double-layer diaphragm structure diaphragm component 40, the second diaphragm piece 41 does not directly contact the straight rod 30. Under alternating stress and reciprocating motion, even if the first diaphragm piece 41 is damaged or torn, the second diaphragm piece 42 remains intact, allowing the diaphragm pump to continue operating normally. The two diaphragm layers work together to form a tighter sealing barrier, effectively preventing media leakage and ensuring production safety and environmental stability. Compared to a single-layer diaphragm, the double-layer diaphragm structure significantly extends the diaphragm's service life, reduces replacement frequency, lowers equipment maintenance costs and downtime, and improves production efficiency. Furthermore, in situations involving high-temperature, high-pressure, and high-viscosity media transport, the double-layer diaphragm component 40 exhibits better adaptability, maintaining good performance even under complex operating conditions.

[0045] Specifically, the connection method between the first piece 41 and the second piece 42 is not specifically limited; it can be bonding or snap-fitting, with bonding being the preferred connection method.

[0046] Specifically, the connection between the first piece 41 and the straight rod 30 is a fixed connection. The specific connection method is not limited. It can be adhesive, snap-fit, threaded connection, or screw connection, as long as the fixed connection between the first piece 41 and the straight rod 30 can be achieved.

[0047] However, the applicant discovered that although the double-layered sheet can solve the problem of easy tearing of a single diaphragm sheet, after long-term use, the first sheet 41 and the second sheet 42 will be slightly separated. This will reduce the volume of the pump chamber 21, thereby affecting the liquid delivery capacity of the diaphragm pump. This will reduce the working efficiency of the diaphragm pump, increase the workload of the diaphragm pump, and shorten the service life of the diaphragm pump. Based on this, as an implementation method, a plurality of grooves 411 are provided on the surface where the first sheet 41 and the second sheet 42 are attached, and a protrusion 421 that cooperates with the grooves 411 is provided on the surface where the second sheet 42 and the first sheet 41 are attached.

[0048] Under this setting, refer to Figure 2 The groove 411 on the first sheet 41 and the protrusion 421 on the second sheet 42 can cooperate to achieve the engagement of the first sheet 41 and the second sheet 42. Adding adhesive material to the groove 411 on the first sheet 41 can promote a tighter engagement between the groove 411 on the first sheet 41 and the protrusion 421 on the second sheet 42. Due to the presence of adhesive material, the first sheet 41 and the second sheet 42 can be better bonded through the groove 411 and the protrusion 421, improving the bonding degree between the first sheet 41 and the groove 411. In subsequent use, the first sheet 41 and the second sheet 42 can be better fitted, thereby preventing separation and extending the service life of the diaphragm component. At the same time, it can also ensure the operating efficiency of the diaphragm pump to a certain extent.

[0049] In one embodiment, the diameters of the first piece 41 and the second piece 42 are both d, the diameter of the groove 411 is a, a≤1 / 2d, and the diameter of the protrusion 421 is b, b=a+1 / 300d; the first piece 41 and the second piece 42 are bonded together by an adhesive layer.

[0050] In this configuration, the diameter of the groove 411 on the first sheet 41 is smaller than the diameter of the protrusion 421 on the second sheet 42. The groove 411 and the protrusion 421 are interference-fitted. Although the first sheet 41 and the second sheet 42 are joined together, the joints at other positions on the first sheet 41 and the second sheet 42 are not very tight. Therefore, the remaining positions on the first sheet 41 and the second sheet 42 are bonded together by adding adhesive material. This increases the contact area between the first sheet 41 and the second sheet 42, thereby improving the degree of adhesion between the two. This makes the double-layer structure of the diaphragm component 40 more stable and tighter. At the same time, the two methods of adhesive bonding and interference fit work together to improve the connection stability between the first sheet 41 and the second sheet 42, making the diaphragm component 40 more stable during the operation of the diaphragm pump and preventing the first sheet 41 and the second sheet 42 from separating.

[0051] When the first piece 41 and the second piece 42 are made of the same material, they can be connected better and more tightly when fixed, and the probability of separation during subsequent use is greatly reduced.

[0052] Specifically, when the diameter of the groove 411 is 1 / 2d, the diameter of the protrusion 421 that is interference-fitted with the groove 411 is 1 / 2d + 1 / 300d. Under this diameter difference, the groove 411 and the protrusion 421 can be well fixed, and the groove 411 and the protrusion 421 can be well fitted. The protrusion 421 will not be excessively interference-fitted, which would cause the groove 411 to be cracked.

[0053] In one embodiment, the first sheet 41 and the second sheet 42 are made of rubber or fluoride. This configuration, where the first sheet 41 and the second sheet 42 are made of rubber or fluoride, provides excellent resistance to various chemicals, maintains stable performance, and effectively resists corrosion from acidic and alkaline solutions, oils, and other media. Using these materials significantly extends the service life of the diaphragm pump when conveying corrosive media, reducing the risk of diaphragm damage and leakage due to corrosion. Furthermore, both rubber and fluoride possess good processability, allowing for flexible design and processing through various processes to produce first sheets 41 and second sheets 42 of various complex shapes and sizes, improving production efficiency and reducing manufacturing costs.

[0054] In one implementation, discs 31 are provided at both ends of the straight rod 30, and the straight rod 30 is fixedly connected to the first plate 41 through the discs 31. With this configuration, the force distribution between the diaphragm component 40 and the straight rod 30 is more uniform, which can effectively reduce the risk of loosening, deformation, or even breakage of the connection caused by local stress concentration. During the operation of the diaphragm pump, the diaphragm component 40 reciprocates frequently. After increasing the contact area, the straight rod 30 can drive the diaphragm component 40 to move more stably, avoiding the impact of unstable connection on the normal operation of the diaphragm pump, ensuring continuous and efficient operation of the equipment. At the same time, due to the more uniform stress distribution, the wear of the contact parts between the diaphragm component 40 and the straight rod 30 will be reduced, reducing the replacement frequency, extending the service life of the diaphragm component 40 and the straight rod 30, reducing equipment maintenance costs and downtime, and improving production efficiency and economic benefits.

[0055] Specifically, the connection method between the disc 31 and the straight rod 30 is not limited. It can be a threaded connection, a snap-fit ​​connection, or an integral molding, as long as it can achieve a fixed connection between the disc 31 and the straight rod 30.

[0056] In one implementation, the disc 31 is circumferentially provided with an extension strip 311, one end of which is fixedly connected to the disc 31, and the extension strip 311 is connected to the surface of the first plate 41. This arrangement increases the connection area and contact points between the two, making the connection between the disc 31 and the first plate 41 more robust. During the operation of the diaphragm pump, the components inside the pump are subjected to forces from high-frequency reciprocating motion. The extension strip 311 effectively prevents the disc 31 and the first plate 41 from loosening or falling off under such complex stress conditions, ensuring stable operation of the equipment. Simultaneously, the extension strip 311 allows the force transmitted from the disc 31 to the first plate 41 to be more evenly distributed, preventing damage to the first plate 41 due to localized stress concentration and extending its service life.

[0057] Specifically, the connection method between the extension strip 311 and the disc 31 is not specifically limited. It can be welding or integral molding, as long as the disc 31 and the extension strip 311 can be fixedly connected.

[0058] Specifically, the connection method between the extension strip 311 and the first piece 41 is not specifically limited. It can be adhesive or snap-fit. Alternatively, a slot matching the extension strip 311 (not shown in the figure) can be provided on the surface of the first piece 41 where it connects to the straight rod 30. By connecting the extension strip 311 through the slot, the connection between the extension strip 311 and the first piece 41 can be better realized. At the same time, adhesive material can be added to the slot to further improve the tightness of the connection between the first piece 41 and the extension strip 311. As long as the connection between the first piece 41 and the extension strip 311 can be realized, it is acceptable.

[0059] In one embodiment, the pump chamber 21 is provided with several fixing holes (not shown in the figure) on the side near the channel 22. The fixing holes are used to fix the diaphragm component 40. With this configuration, the diaphragm component 40 can be connected to the pump chamber 21 through the fixing holes and the fixing components. At the same time, the fixing holes can make the fixing effect more stable and prevent the diaphragm component 40 from falling off the pump chamber 21, thereby affecting the operation of the diaphragm pump.

[0060] Specifically, the fixing holes are evenly arranged circumferentially along the side of the pump cavity 21 near the channel 22.

[0061] As one implementation, it also includes a shock-absorbing assembly 50, which is connected to the bottom of the base 10. The shock-absorbing assembly 50 includes an upper horizontal plate 51, a lower horizontal plate 53 and a plurality of shock-absorbing springs 52, which are evenly arranged between the upper horizontal plate 51 and the lower horizontal plate 53.

[0062] In this configuration, when the diaphragm pump vibrates during operation, the damping spring 52 can undergo elastic deformation, converting the vibration energy generated during equipment operation into the elastic potential energy of the spring. This weakens the transmission of vibration to the base 10, reduces the impact of vibration on the diaphragm pump's own components, and prevents the equipment from shifting, tilting, or loosening due to vibration. At the same time, the damping assembly 50 can effectively reduce the noise generated by the diaphragm pump during operation by absorbing and buffering vibration.

[0063] In one implementation, the diameter of the shock-absorbing spring 52 is 1 / 8 to 1 / 2 of the length of the pump body 20, and the ratio of the height to the diameter of the shock-absorbing spring 52 is 1:1.

[0064] In this configuration, setting the diameter of the damping spring 52 to 1 / 8 to 1 / 2 of the pump body 20 length allows the spring to produce appropriate elastic deformation under stress, providing suitable buffering force for the diaphragm pump. If the spring diameter is too small, the load-bearing capacity is limited, and it cannot effectively buffer the large vibrations and impacts generated by the operation of the pump body 20; if the diameter is too large, the spring may be too stiff and difficult to flexibly absorb vibration energy. The height-to-diameter ratio of the damping spring 52 is 1:1, which ensures that the spring maintains good morphological stability during compression and tension, making it less prone to instability. At the same time, this proportional length of the damping spring 52 meets the damping requirements while avoiding an excessively large spring size that occupies too much space, ensuring a compact overall structure of the diaphragm pump.

[0065] Specifically, when the diameter of the shock-absorbing spring 52 is set to 1 / 8 of the length of the pump body 20, the height of the shock-absorbing spring 52 is also 1 / 8 of the length of the pump body 20. At this time, eight shock-absorbing springs 52 are evenly arranged in the transverse direction along the lower horizontal plate 5353, and corresponding shock-absorbing springs 52 are evenly arranged according to the width of the pump body 20.

[0066] Specifically, when the diameter of the damping spring 52 is set to 1 / 2 the length of the pump body 20, the height of the damping spring 52 is also 1 / 2 the length of the pump body 20. In this case, two damping springs 52 are evenly arranged laterally along the lower horizontal plate 53. If only one damping spring 52 is used, the damping effect on the diaphragm pump will decrease, and if the damping spring 52 is too large, its rigidity will also increase, and the damping effect will decrease accordingly, making it impossible to achieve good damping.

[0067] In one implementation, the upper horizontal plate 51 and the base 10 are detachably connected. With this configuration, when the diaphragm pump is no longer in use and needs to be moved, the upper horizontal plate 51 can be disassembled from the base 10, thus separating the diaphragm pump from the shock-absorbing assembly 50. Only the diaphragm pump needs to be moved. This is especially useful when the diaphragm pump is damaged and needs repair; the damaged diaphragm pump can be removed from the shock-absorbing assembly 50, and the base 10 of the new diaphragm pump can be connected to the upper horizontal plate 51 of the shock-absorbing assembly 50 to ensure normal system operation. If the shock-absorbing assembly 50 is damaged, it can simply be removed from the diaphragm pump and replaced with a suitable shock-absorbing assembly 50 for continued use, reducing downtime and improving overall work efficiency.

[0068] The above description is merely an embodiment of this application, and the scope of protection of this application is not limited to these specific embodiments, but is determined by the claims 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 technical concept and principles of this application should be included within the scope of protection of this application.

Claims

1. A diaphragm pump containing a double-layered diaphragm element, characterized in that, include: Base; The pump body is fixedly connected to the upper end of the base. The pump body has two opposing pump chambers inside, and a channel is provided between the two pump chambers. Each pump chamber is connected to an inlet pipe and an outlet pipe. A one-way valve is provided in the inlet pipe. A straight rod, which is slidably connected to the channel; Two diaphragm components are fixedly connected to both ends of the straight rod. The diaphragm components are disposed in the pump chamber. Each diaphragm component includes a first sheet and a second sheet that are attached together. The first sheet is fixedly connected to the straight rod, and the edge of the first sheet is fixedly connected to the side of the pump chamber near the channel. A drive device for driving the straight rod to reciprocate.

2. The diaphragm pump containing a double-layer diaphragm component according to claim 1, characterized in that, The surfaces of the first sheet and the second sheet that are in contact with each other are provided with a plurality of grooves, and the surfaces of the second sheet and the first sheet that are in contact with each other are provided with protrusions that cooperate with the grooves.

3. The diaphragm pump containing a double-layer diaphragm component according to claim 2, characterized in that, The diameters of the first and second pieces are both d, the diameter of the groove is a, a≤1 / 2d, and the diameter of the protrusion is b, b=a+1 / 300d; The first and second pieces are bonded together with an adhesive layer.

4. The diaphragm pump containing a double-layer diaphragm component according to claim 3, characterized in that, The first sheet and the second sheet are made of rubber or fluoride.

5. The diaphragm pump containing a double-layer diaphragm component according to claim 1, characterized in that, The straight rod has discs at both ends, and the straight rod is fixedly connected to the first piece of material through the discs.

6. The diaphragm pump containing a double-layer diaphragm component according to claim 5, characterized in that, The disk is provided with an extension strip in the circumference, one end of the extension strip is fixedly connected to the disk, and the extension strip is connected to the surface of the first piece.

7. The diaphragm pump containing a double-layer diaphragm component according to claim 1, characterized in that, A fixing hole is provided on the side of the pump chamber near the channel, and the fixing hole is used to fix the diaphragm component.

8. The diaphragm pump containing a double-layer diaphragm component according to claim 1, characterized in that, It also includes a shock-absorbing assembly connected to the bottom of the base. The shock-absorbing assembly includes an upper horizontal plate, a lower horizontal plate, and several shock-absorbing springs, which are evenly arranged between the upper and lower horizontal plates.

9. The diaphragm pump containing a double-layer diaphragm component according to claim 8, characterized in that, The diameter of the shock-absorbing spring is 1 / 8 to 1 / 2 of the length of the pump body, and the ratio of the height to the diameter of the shock-absorbing spring is 1:

1.

10. The diaphragm pump containing a double-layered diaphragm element according to claim 8, characterized in that, The upper horizontal plate and the base are detachably connected.

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