A self-cleaning pneumatic diaphragm pump

Abstract

The present invention discloses a self-cleaning pneumatic diaphragm pump, comprising a middle shell, a pneumatic mechanism, a diaphragm mechanism, a connecting mechanism and a self-cleaning mechanism. An outer shell is provided on both sides of the middle shell, the middle shell and the outer shell are detachably connected, an annular mounting groove is provided on the side wall of the outer shell, an inlet pipe is provided at the bottom of the outer shell, an outlet pipe is provided at the top of the outer shell, the pneumatic mechanism is arranged inside the middle shell, the pneumatic mechanism is used to drive the diaphragm mechanism, and the diaphragm mechanism is arranged between the middle shell and the outer shell. The present invention can drive the self-cleaning mechanism through a rod while the start mechanism starts the diaphragm operation, so that the fluid adhering to the diaphragm surface can be automatically cleaned by a cleaning strip rotating on the surface of the fitting rod, so that the diaphragm pump does not need to be manually disassembled, thereby saving labor and increasing the service life of the device.

Description

Technical Field

[0001] The invention relates to the field of diaphragm pumps, and in particular to a self-cleaning pneumatic diaphragm pump. Background Art

[0002] At present, pneumatic diaphragm pumps are widely used in the chemical, petroleum, printing and dyeing, medicine, food, electroplating and other industries to transport liquids such as petroleum and chemicals. The various characteristics of these media require pneumatic diaphragm pumps to be corrosion-resistant, wear-resistant and leak-free; pneumatic diaphragm pumps are mainly used to transport toxic and harmful, strong acids, strong alkalis, highly corrosive, flammable and explosive, high-viscosity, and particle-containing media in the production processes of petroleum, chemical, pharmaceutical, printing and dyeing, electroplating, food, environmental protection and other enterprises. The pneumatic diaphragm pump is mainly composed of two parts: the transmission part and the diaphragm cylinder head. The transmission part is the driving mechanism that drives the diaphragm back and forth. Its transmission forms include mechanical transmission, hydraulic transmission and pneumatic transmission. The cylinder head of the pneumatic diaphragm pump is mainly composed of a diaphragm to separate the liquid to be transported and the working liquid. When the diaphragm moves to one side of the transmission mechanism, the pump cylinder works under negative pressure and sucks in the liquid. When the diaphragm moves to the other side, the liquid is discharged.

[0003] A Chinese invention patent with publication number CN214366651U, a pneumatic diaphragm pump device that is easy to clean, relates to the technical field of pneumatic diaphragm pumps, the pneumatic diaphragm pump device that is easy to clean comprises a pump body and two cover plates, the top and bottom of the pump body are provided with grooves, the left sides of the two cover plates are fixedly connected with connecting plates, the front sides of the two connecting plates are provided with sliding grooves, the inner walls of the two grooves are fixedly connected with shaft rods, the surfaces of the two shaft rods are respectively movably connected to the inner walls of the two sliding grooves, the inner walls of the two cover plates are provided with first annular grooves, the inner walls of the two first annular grooves are provided with second annular grooves, and the inner walls of the two second annular grooves are respectively movably connected to the inner walls of the two gear rings.

[0004] However, the above patent has the following shortcomings:

[0005] 1. The above patent solves the problem that the removal and installation of the end cover of the commonly used pneumatic diaphragm pump requires the screwing of multiple bolts, which leads to the problem that the cleaning of the pneumatic diaphragm pump is cumbersome and the working efficiency is low, by providing a cover plate, a pump body, a pull rod, and an arc-shaped inclined plate. However, when cleaning the diaphragm, the end cover still needs to be removed to clean the diaphragm;

[0006] 2. The existing pneumatic diaphragm pump lacks components that are easy to move, making it inconvenient to move the device, and the random installation of the mobile structure may also affect the normal installation of the device. Summary of the invention

[0007] The object of the present invention is to provide a self-cleaning pneumatic diaphragm pump. By setting up a self-cleaning mechanism, the self-cleaning mechanism can be driven by a rod while the diaphragm is started by a starting mechanism, so that the fluid adhered to the surface of the diaphragm can be automatically cleaned by a cleaning strip that rotates and fits the surface of the rod, thereby eliminating the need for manual disassembly of the diaphragm pump, thereby saving labor and solving the above-mentioned deficiencies in the technology.

[0008] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a self-cleaning pneumatic diaphragm pump, comprising a middle housing, a pneumatic mechanism, a diaphragm mechanism, a connecting mechanism and a self-cleaning mechanism;

[0009] An outer shell is provided on both sides of the middle shell, the middle shell and the outer shell are detachably connected, an annular mounting groove is provided on the side wall of the outer shell, an inlet pipe is connected to the bottom of the outer shell, and an outlet pipe is connected to the top of the outer shell;

[0010] The pneumatic mechanism is arranged inside the middle housing, and the pneumatic mechanism is used to transmit the diaphragm mechanism;

[0011] The diaphragm mechanism is arranged between the middle shell and the outer shell, and is used to divide the space between the outer shell and the middle shell, and is also used to control the volume change inside the outer shell;

[0012] The connecting mechanism is arranged on the outside of the middle shell, and the connecting mechanism is used for connecting the device with the equipment;

[0013] The self-cleaning mechanism is arranged inside the outer shell, and is used to clean the fluid adhered to the surface of the diaphragm;

[0014] The diaphragm mechanism includes a diaphragm, the number of which is set to two, the two diaphragms are respectively arranged inside two outer shells, the outer side of the diaphragm corresponds to the annular mounting groove, one side of the diaphragm is fixedly connected to an outer pressure plate, the other side of the diaphragm is fixedly connected to an inner pressure plate, the side wall of the outer pressure plate is fixedly connected to an abutment shaft, a connecting shaft is fixedly connected between the two inner pressure plates, and the connecting shaft corresponds to the pneumatic mechanism;

[0015] The connecting mechanism comprises a first connecting pipe, a second connecting pipe, a first one-way ball valve and a second one-way ball valve, the two ends of the first connecting pipe are respectively detachably connected to the two inlet pipes, the middle of the first connecting pipe is connected to a feed pipe, the two ends of the second connecting pipe are respectively detachably connected to the two outlet pipes, and the middle of the second connecting pipe is connected to a discharge pipe;

[0016] The number of the first one-way ball valves is set to two, and the two first one-way ball valves are respectively arranged in two inlet pipes; the number of the second one-way ball valves is set to two, and the two second one-way ball valves are respectively arranged in two outlet pipes;

[0017] The number of the self-cleaning mechanisms is set to two, and the two self-cleaning mechanisms are respectively arranged inside the two outer shells, and the self-cleaning mechanisms include a flow storage component, a transmission component and a cleaning component;

[0018] The transmission component includes an annular bin, which is arranged at the top of the flow storage bin, and the two sides of the annular bin are eccentrically connected to the two first drainage pipes respectively, and a rotating ring is rotatably arranged on the top of the annular bin, and a plurality of blades are fixedly connected to the bottom of the rotating ring, and the blades correspond to the inner wall of the annular bin, and the inner wall of the annular bin is fixedly connected to a limiting ring, and the limiting ring corresponds to the piston column;

[0019] The cleaning component includes a connecting rod, the number of the connecting rods is set to be multiple, the multiple connecting rods are fixedly connected to the rotating ring, and the multiple connecting rods are distributed around the center of the rotating ring;

[0020] The end of the connecting rod is fixedly connected with a fitting rod, the fitting rod is set in an arc shape, the fitting rod is made of elastic plastic material, and a cleaning strip is provided on the surface of the fitting rod, and the cleaning strip corresponds to the surface of the diaphragm.

[0021] The pneumatic mechanism is the pneumatic structure of the existing pneumatic diaphragm pump on the market. By starting the pneumatic mechanism, the connecting shaft can be driven to move left and right. At the same time, the two ends of the connecting shaft will reciprocate and squeeze the diaphragms at both ends, thereby causing the diaphragms to deform. During the deformation process, the volume inside the outer shell will change.

[0022] When the volume in the outer shell decreases, negative pressure will be generated in the outer shell, at which time the first one-way ball valve opens and the second one-way ball valve closes, and at this time the fluid in the first connecting pipe enters the outer shell through the inlet pipe;

[0023] When the volume in the outer shell increases, the pressure in the outer shell increases. At this time, the first one-way ball valve is closed and the second one-way ball valve is opened. At this time, the fluid in the outer shell will enter the second connecting pipe through the outlet pipe.

[0024] Preferably, the flow storage component comprises a flow storage chamber, the flow storage chamber is arranged inside the outer shell, a piston chamber is opened in the middle of the flow storage chamber, a flow channel chamber is connected between the piston chamber and the flow storage chamber, and the flow channel chamber is fixedly connected to the inner wall of the outer shell;

[0025] A piston column is slidably arranged inside the piston chamber, a return spring is arranged at the bottom of the piston column, the top of the return spring abuts against the piston column, and the bottom of the return spring abuts against the piston chamber;

[0026] A first drainage pipe and a second drainage pipe are provided on the top of the flow storage bin, the first drainage pipe is connected to the flow storage bin, the number of the first drainage pipes is set to two, the second drainage pipe is connected to the flow storage bin, the number of the second drainage pipes is set to two, the second drainage pipe is connected to the flow storage bin, and a third one-way ball valve is provided inside the second drainage pipe;

[0027] When the piston rod is squeezed and slides into the piston chamber, the return spring is compressed, and the pressure in the piston chamber increases. At this time, the third one-way ball valve is closed, and the fluid in the piston chamber enters the flow storage chamber through the flow channel chamber, and the fluid in the flow storage chamber is discharged through the first drainage pipe;

[0028] When the piston column is no longer under pressure, the compressed return spring will squeeze the piston column, causing the piston column to slide out of the piston chamber. At this time, negative pressure will be generated in the piston chamber, and the third one-way ball valve will open. The fluid can enter the flow storage chamber through the second drainage pipe. At the same time, the fluid in the flow storage chamber can enter the piston chamber through the flow channel chamber, thereby filling the piston chamber.

[0029] The fluid discharged from the first drainage pipe will enter the annular chamber, and the annular chamber will impact the blades, thereby driving the blades and the rotating ring to rotate.

[0030] The rotating ring drives the fitting rod to rotate through the connecting rod while rotating. When the cleaning strip on the surface of the fitting rod fits the diaphragm, the cleaning strip is driven to rotate by the fitting rod to scrape and clean the fluid adhering to the surface of the diaphragm.

[0031] Preferably, two fixing seats are fixedly connected to the bottom of the first connecting pipe, and fixing holes are provided on the surface of the fixing seats. The number of the fixing holes is set to be multiple, and the multiple fixing holes are evenly distributed. A hinged rod is hingedly provided on one side of the fixing seat, and a mounting hole is provided in the middle of the hinged rod. A first threaded hole is provided on one side of the hinged rod, and a second threaded hole is provided on the other side of the hinged rod. The first threaded hole and the second threaded hole are both provided on the surface of the fixing seat, and the first threaded hole and the second threaded hole are both matched with the mounting hole. A moving wheel is rotatably provided on the end of the hinged rod;

[0032] By setting a fixing seat, the device can be conveniently fixed on the supporting surface, so as to facilitate the installation of the device. By inserting a bolt into the mounting hole and threading it with the first threaded hole, the hinge rod can be fixed on the top of the hinge point, and the moving wheel does not contact the ground at this time;

[0033] The hinge rod can be fixed to the side of the hinge point by inserting a bolt into the mounting hole and threading it with the second threaded hole. At this time, the moving wheel is in contact with the ground, so that the device can be moved easily.

[0034] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0035] 1. By setting up a self-cleaning mechanism, the self-cleaning mechanism can be driven by the rod while the diaphragm is started by the starting mechanism, so that the fluid adhering to the diaphragm surface can be automatically cleaned by the cleaning strip that rotates and fits the surface of the rod, thereby eliminating the need to manually disassemble the diaphragm pump and saving labor;

[0036] 2. By changing the fixed angle of the hinged rod, the position of the moving wheel can be adjusted, so that the device can be moved conveniently without affecting the installation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0040] Figure 3 It is a schematic diagram of the outer shell structure of the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of the diaphragm mechanism of the present invention;

[0042] Figure 5 It is a schematic diagram of the self-cleaning structure of the present invention;

[0043] Figure 6 It is an exploded schematic diagram of the self-cleaning structure of the present invention;

[0044] Figure 7 A cross-sectional view of the flow storage bin of the present invention;

[0045] Figure 8 For the present invention Figure 1 An enlarged view of the internal structure.

[0046] Description of reference numerals:

[0047] 1. Middle shell; 11. Outer shell; 12. Annular mounting groove; 13. Inlet pipe; 14. Outlet pipe;

[0048] 2. Pneumatic mechanism;

[0049] 3. Diaphragm mechanism; 31. Diaphragm; 32. External pressure plate; 33. Internal pressure plate; 34. Abutment shaft; 35. Connecting shaft;

[0050] 4. Connecting mechanism; 41. First connecting pipe; 42. Second connecting pipe; 43. First one-way ball valve; 44. Second one-way ball valve; 45. Feed pipe; 46. Discharge pipe;

[0051] 5. Self-cleaning mechanism;

[0052] 51, flow storage component; 511, flow storage chamber; 512, piston chamber; 513, flow channel chamber; 514, piston column; 515, return spring; 516, first drainage tube; 517, second drainage tube;

[0053] 52, transmission parts; 521, annular chamber; 522, rotating ring; 523, blades; 524, limit

[0054] ring

[0055] 53. cleaning component; 531. connecting rod; 532. fitting rod; 533. cleaning strip;

[0056] 6. Fixed seat; 61. Fixed hole; 62. Articulated rod; 63. Mounting hole; 64. First threaded hole; 65. Second threaded hole; 66. Moving wheel. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The present invention provides Figure 1-8 A self-cleaning pneumatic diaphragm pump shown includes a middle housing 1, a pneumatic mechanism 2, a diaphragm mechanism 3, a connecting mechanism 4 and a self-cleaning mechanism 5;

[0059] An outer shell 11 is disposed on both sides of the middle shell 1. The middle shell 1 and the outer shell 11 are detachably connected. An annular mounting groove 12 is provided on the side wall of the outer shell 11. An inlet pipe 13 is connected to the bottom of the outer shell 11, and an outlet pipe 14 is connected to the top of the outer shell 11.

[0060] The pneumatic mechanism 2 is arranged inside the middle housing 1, and the pneumatic mechanism 2 is used to transmit the diaphragm mechanism 3;

[0061] The diaphragm mechanism 3 is disposed between the middle shell 1 and the outer shell 11. The diaphragm mechanism 3 is used to divide the space between the outer shell 11 and the middle shell 1, and is also used to control the volume change inside the outer shell 11.

[0062] The connecting mechanism 4 is arranged outside the middle shell 1, and the connecting mechanism 4 is used for connecting the device with the equipment;

[0063] The self-cleaning mechanism 5 is disposed inside the outer shell 11, and the self-cleaning mechanism 5 is used to clean the fluid adhered to the surface of the diaphragm 31;

[0064] The diaphragm mechanism 3 includes a diaphragm 31, the number of which is set to two, and the two diaphragms 31 are respectively arranged inside the two outer shells 11, the outer side of the diaphragm 31 corresponds to the annular mounting groove 12, one side of the diaphragm 31 is fixedly connected to an outer pressure plate 32, and the other side of the diaphragm 31 is fixedly connected to an inner pressure plate 33, the side wall of the outer pressure plate 32 is fixedly connected to an abutment shaft 34, and a connecting shaft 35 is fixedly connected between the two inner pressure plates 33, and the connecting shaft 35 corresponds to the pneumatic mechanism 2;

[0065] The communication mechanism 4 includes a first communication pipe 41, a second communication pipe 42, a first one-way ball valve 43 and a second one-way ball valve 44. The two ends of the first communication pipe 41 are detachably connected to the two inlet pipes 13, and the middle of the first communication pipe 41 is connected to a feed pipe 45. The two ends of the second communication pipe 42 are detachably connected to the two outlet pipes 14, and the middle of the second communication pipe 42 is connected to a discharge pipe 46.

[0066] The number of the first one-way ball valves 43 is set to two, and the two first one-way ball valves 43 are respectively arranged in the two inlet pipes 13; the number of the second one-way ball valves 44 is set to two, and the two second one-way ball valves 44 are respectively arranged in the two outlet pipes 14;

[0067] The number of the self-cleaning mechanisms 5 is set to two, and the two self-cleaning mechanisms 5 are respectively arranged inside the two outer shells 11, and the self-cleaning mechanisms 5 include a flow storage component 51, a transmission component 52 and a cleaning component 53;

[0068] The transmission component 52 includes an annular bin 521, which is arranged on the top of the flow storage bin 511. Both sides of the annular bin 521 are eccentrically connected to two first drainage pipes 516. A rotating ring 522 is rotatably arranged on the top of the annular bin 521. A plurality of blades 523 are fixedly connected to the bottom of the rotating ring 522. The blades 523 correspond to the inner wall of the annular bin 521. A limiting ring 524 is fixedly connected to the inner wall of the annular bin 521. The limiting ring 524 corresponds to the piston column 514.

[0069] The cleaning component 53 includes a connecting rod 531, and the number of the connecting rods 531 is set to be multiple, and the multiple connecting rods 531 are fixedly connected to the rotating ring 522, and the multiple connecting rods 531 are distributed around the center of the rotating ring 522;

[0070] The end of the connecting rod 531 is fixedly connected with a fitting rod 532 . The fitting rod 532 is set to be arc-shaped and made of elastic plastic material. A cleaning strip 533 is provided on the surface of the fitting rod 532 . The cleaning strip 533 corresponds to the surface of the diaphragm 31 .

[0071] Further, in the above technical solution, the flow storage component 51 includes a flow storage bin 511, which is arranged inside the outer shell 11, and a piston bin 512 is opened in the middle of the flow storage bin 511, and a flow channel bin 513 is connected between the piston bin 512 and the flow storage bin 511, and the flow channel bin 513 is fixedly connected to the inner wall of the outer shell 11;

[0072] A piston column 514 is slidably disposed inside the piston chamber 512, and a return spring 515 is disposed at the bottom of the piston column 514. The top of the return spring 515 abuts against the piston column 514, and the bottom of the return spring 515 abuts against the piston chamber 512.

[0073] A first drainage tube 516 and a second drainage tube 517 are arranged on the top of the flow storage tank 511, and the first drainage tube 516 is connected to the flow storage tank 511, the number of the first drainage tubes 516 is set to two, and the second drainage tube 517 is connected to the flow storage tank 511, the number of the second drainage tubes 517 is set to two, and the second drainage tube 517 is connected to the flow storage tank 511, and a third one-way ball valve 518 is arranged inside the second drainage tube 517.

[0074] Furthermore, two fixing seats 6 are fixedly connected to the bottom of the first connecting pipe 41, and fixing holes 61 are opened on the surface of the fixing seat 6. The number of the fixing holes 61 is set to be multiple, and the multiple fixing holes 61 are evenly distributed. A hinged rod 62 is hingedly set on one side of the fixing seat 6, and a mounting hole 63 is opened in the middle of the hinged rod 62. A first threaded hole 64 is set on one side of the hinged rod 62, and a second threaded hole 65 is set on the other side of the hinged rod 62. The first threaded hole 64 and the second threaded hole 65 are both set on the surface of the fixing seat 6, and the first threaded hole 64 and the second threaded hole 65 are both matched with the mounting hole 63. A moving wheel 66 is rotatably set at the end of the hinged rod 62.

[0075] Working principle of the present invention:

[0076] Refer to the instruction manual Figure 1-8 When the device is in use, the pneumatic mechanism 2 is activated to drive the connecting shaft 35 to move left and right, and at the same time, the two ends of the connecting shaft 35 will reciprocate to squeeze the diaphragms 31 at the two ends, so that the diaphragms 31 are deformed. During the deformation process, the volume inside the outer shell 11 changes, and at the same time, the outer pressure plate 32 drives the abutting shaft 34 to reciprocate and squeeze the piston column 514;

[0077] When the piston rod 514 is squeezed and slides into the piston chamber 512, the return spring 515 is compressed, and the pressure in the piston chamber 512 increases. At this time, the third one-way ball valve 518 is closed, and the fluid in the piston chamber 512 enters the flow storage chamber 511 through the flow channel chamber 513, and the fluid in the flow storage chamber 511 is discharged through the first drainage pipe 516;

[0078] When the piston rod 514 is no longer under pressure, the compressed return spring 515 squeezes the piston rod 514, so that the piston rod slides out of the piston chamber 512. At this time, negative pressure is generated in the piston chamber 512, and the third one-way ball valve 518 opens. The fluid can enter the flow storage chamber 511 through the second drainage pipe 517. At the same time, the fluid in the flow storage chamber 511 can enter the piston chamber 512 through the flow channel chamber 513, thereby filling the piston chamber 512.

[0079] The fluid discharged from the first drainage tube 516 will enter the annular bin 521, and the annular bin 521 will impact the blade 523, thereby driving the blade 523 and the rotating ring 522 to rotate. The rotating ring 522 will drive the fitting rod 532 to rotate through the connecting rod 531. When the cleaning strip 533 on the surface of the fitting rod 532 fits with the diaphragm 31, the cleaning strip 533 is driven to rotate by the fitting rod 532, so that the fluid adhering to the surface of the diaphragm 31 can be scraped and cleaned.

[0080] Refer to the instruction manual Figure 1-8 When the device is in use, the fixing seat 6 can be provided to conveniently fix the device on the supporting surface, thereby facilitating the installation of the device. The hinge rod 8 can be fixed on the top of the hinge point by inserting a bolt into the mounting hole 9 and threading it with the first threaded hole 10. At this time, the moving wheel 12 does not contact the ground;

[0081] The hinge rod 8 can be fixed to the side of the hinge point by inserting a bolt into the mounting hole 9 and threading it with the second threaded hole 11. At this time, the moving wheel 12 is in contact with the ground, so that the device can be moved easily.

[0082] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0083] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-cleaning pneumatic diaphragm pump, characterized in that: It includes a middle shell, a pneumatic mechanism, a diaphragm mechanism, a connecting mechanism and a self-cleaning mechanism; An outer shell is provided on both sides of the middle shell, and the middle shell and the outer shell are detachably connected. An annular mounting groove is provided on the side wall of the outer shell, an inlet pipe is provided at the bottom of the outer shell, and an outlet pipe is provided at the top of the outer shell; The pneumatic mechanism is arranged inside the middle housing, and the pneumatic mechanism is used to transmit the diaphragm mechanism; The diaphragm mechanism is arranged between the middle shell and the outer shell, and is used to divide the space between the outer shell and the middle shell, and is also used to control the volume change inside the outer shell; The connecting mechanism is arranged outside the middle shell, and the connecting mechanism is used for connecting the device with the equipment; The self-cleaning mechanism is arranged inside the outer shell, and is used to clean the fluid adhering to the surface of the diaphragm; The diaphragm mechanism includes a diaphragm, the number of which is set to two, and the two diaphragms are respectively arranged inside the two outer shells, the outer side of the diaphragm corresponds to the annular mounting groove, one side of the diaphragm is fixedly connected to an outer pressure plate, the other side of the diaphragm is fixedly connected to an inner pressure plate, the side wall of the outer pressure plate is fixedly connected to an abutment shaft, and a connecting shaft is fixedly connected between the two inner pressure plates, and the connecting shaft corresponds to the pneumatic mechanism; The connecting mechanism includes a first connecting pipe, a second connecting pipe, a first one-way ball valve and a second one-way ball valve. The two ends of the first connecting pipe are detachably connected to the two inlet pipes, the middle of the first connecting pipe is connected to the feed pipe, the two ends of the second connecting pipe are detachably connected to the two outlet pipes, and the middle of the second connecting pipe is connected to the outlet pipe; The number of the first one-way ball valves is set to two, and the two first one-way ball valves are respectively arranged in the two inlet pipes; the number of the second one-way ball valves is set to two, and the two second one-way ball valves are respectively arranged in the two outlet pipes; The number of the self-cleaning mechanisms is set to two, and the two self-cleaning mechanisms are respectively arranged inside the two outer shells, and the self-cleaning mechanisms include a current storage component, a transmission component and a cleaning component; The transmission component includes an annular bin, which is arranged at the top of the flow storage bin, and the two sides of the annular bin are eccentrically connected to the two first drainage pipes respectively, and a rotating ring is rotatably arranged on the top of the annular bin, and a plurality of blades are fixedly connected to the bottom of the rotating ring, and the blades correspond to the inner wall of the annular bin, and the inner wall of the annular bin is fixedly connected to a limit ring, and the limit ring corresponds to the piston column; The cleaning component includes a connecting rod, the number of the connecting rods is set to be multiple, the multiple connecting rods are all fixedly connected to the rotating ring, and the multiple connecting rods are distributed around the center of the rotating ring; The end of the connecting rod is fixedly connected with a fitting rod, the fitting rod is set in an arc shape, the fitting rod is made of elastic plastic material, and a cleaning strip is arranged on the surface of the fitting rod, and the cleaning strip corresponds to the surface of the diaphragm.

2. A self-cleaning pneumatic diaphragm pump according to claim 1, characterized in that: The flow storage component includes a flow storage chamber, which is arranged inside the outer shell, a piston chamber is opened in the middle of the flow storage chamber, a flow channel chamber is connected between the piston chamber and the flow storage chamber, and the flow channel chamber is fixedly connected to the inner wall of the outer shell; A piston column is slidably arranged inside the piston chamber, a return spring is arranged at the bottom of the piston column, the top of the return spring abuts against the piston column, and the bottom of the return spring abuts against the piston chamber; A first drainage pipe and a second drainage pipe are arranged on the top of the flow storage bin, and the first drainage pipe is connected to the flow storage bin. The number of the first drainage pipes is set to two, and the second drainage pipe is connected to the flow storage bin. The number of the second drainage pipes is set to two, and the second drainage pipe is connected to the flow storage bin. A third one-way ball valve is arranged inside the second drainage pipe.

3. A self-cleaning pneumatic diaphragm pump according to claim 1, characterized in that: Two fixing seats are fixedly connected to the bottom of the first connecting pipe, and fixing holes are opened on the surface of the fixing seat. The number of fixing holes is set to multiple, and the multiple fixing holes are evenly distributed. A hinged rod is hingedly arranged on one side of the fixing seat, and a mounting hole is opened in the middle of the hinged rod. A first threaded hole is arranged on one side of the hinged rod, and a second threaded hole is arranged on the other side of the hinged rod. The first threaded hole and the second threaded hole are both arranged on the surface of the fixing seat, and the first threaded hole and the second threaded hole are both matched with the mounting hole. A moving wheel is rotatably arranged at the end of the hinged rod.

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