Plunger type diaphragm pump

Abstract

The utility model relates to the technical field of fluid conveying equipment, in particular to a plunger type diaphragm pump which comprises a confluence assembly, a diaphragm pump assembly and a diaphragm pump assembly. A first confluence cavity and a second confluence cavity are formed in the confluence assembly; the inlet communicates with the first confluence cavity, and the outlet communicates with the second confluence cavity; the two groups of diaphragm pump assemblies are connected with the confluence assembly; the inlet ends of the two sets of diaphragm pump assemblies communicate with the first confluence cavity. The outlet ends of the two sets of diaphragm pump assemblies communicate with the second confluence cavity. A first one-way valve assembly is arranged at the inlet end of the diaphragm pump assembly, and a second one-way valve assembly is arranged at the outlet end of the diaphragm pump assembly. The technical problem that due to the conveying characteristic of existing plunger diaphragm pump equipment, the phenomenon of large pressure fluctuation is likely to be generated in a pipeline, and fluid conveying is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid conveying equipment, in particular to a plunger type diaphragm pump. Background Art

[0002] In today's fast-developing industrial era, fluid delivery equipment is increasingly used, involving various fields such as industry and life. Plug diaphragm pump equipment is an excellent fluid delivery equipment. It has advantages that other pumps do not have. When delivering fluids, it can achieve friction-free and leakage-free risks. However, due to its delivery characteristics, the existing plunger diaphragm pump equipment is prone to large pressure fluctuations in the pipeline, affecting the transmission of the fluid. Utility Model Content

[0003] The utility model provides a plunger diaphragm pump, which solves the technical problem that the existing plunger diaphragm pump equipment is prone to produce a large pressure fluctuation phenomenon in the pipeline due to its conveying characteristics, thus affecting the transmission of the fluid.

[0004] In view of this, the utility model provides a plunger diaphragm pump, comprising:

[0005] A confluence assembly is provided with an inlet and an outlet; a first confluence cavity and a second confluence cavity are provided in the confluence assembly; the inlet is communicated with the first confluence cavity, and the outlet is communicated with the second confluence cavity;

[0006] Two groups of diaphragm pump assemblies are connected to the confluence assembly; the inlet ends of the two groups of diaphragm pump assemblies are communicated with the first confluence cavity; the outlet ends of the two groups of diaphragm pump assemblies are communicated with the second confluence cavity;

[0007] Wherein, a first one-way valve assembly is provided at the inlet end of the diaphragm pump assembly, and a second one-way valve assembly is provided at the outlet end of the diaphragm pump assembly.

[0008] Optionally, the diaphragm pump assembly includes a pump body, a transmission mechanism, a first diaphragm plate and a diaphragm seat;

[0009] One end of the pump body is connected to the diaphragm seat, and the other end is rotatably provided with a driving shaft along its axial direction; the diaphragm seat is provided with at least one mounting groove around its axial direction, and a diaphragm is sealed and connected in the mounting groove;

[0010] The transmission mechanism is located in the inner cavity of the pump body, and the transmission mechanism is sleeved on the driving shaft; the driving shaft is connected to the diaphragm through the transmission mechanism, and is suitable for driving the diaphragm to reciprocate along the axial direction of the driving shaft;

[0011] The first diaphragm plate is sealedly connected to the side of the diaphragm seat provided with the diaphragm; the first diaphragm plate is provided with a diaphragm groove on one side connected to the diaphragm seat, and the other side is connected to the confluence assembly; wherein each diaphragm is provided with a corresponding diaphragm groove, and the diaphragm groove and the diaphragm seat are enclosed to form a diaphragm cavity; the bottom of the diaphragm groove is connected to an outlet valve groove and an inlet valve groove; each inlet valve groove is connected to the first confluence cavity, and each outlet valve groove is connected to the inlet valve groove of the second confluence cavity;

[0012] The first one-way valve assembly includes at least one first one-way valve, and each of the inlet valve grooves is provided with one of the first one-way valves; the second one-way valve assembly includes at least one second one-way valve, and each of the outlet valve grooves is provided with one of the second one-way valves.

[0013] Optionally, two groups of the diaphragm pump assemblies are arranged side by side in parallel, and the two first diaphragm plates are integrated into a second diaphragm plate; the manifold assembly includes a manifold plate and a discharge plate; one side of the manifold plate is sealed and detachably connected to the discharge plate, and the other side is sealed and detachably connected to the second diaphragm plate;

[0014] The inlet valve groove is arranged on the inner side of the first diaphragm plate around the axial direction of the diaphragm seat, and the outlet valve groove is arranged on the outer side of the first diaphragm plate around the axial direction of the diaphragm seat; a first confluence groove is recessed on one side of the confluence plate connected to the second diaphragm plate, and is enclosed with the second diaphragm plate to form the first confluence cavity; the first confluence groove covers all the inlet valve grooves; a confluence plate inlet is provided at the bottom of the first confluence groove; a confluence plate outlet is provided on the confluence plate corresponding to each of the outlet valve grooves;

[0015] A second convergence groove is recessed on one side of the discharge plate where it is connected to the convergence plate, and is formed together with the convergence plate to form the second convergence cavity; the second convergence groove covers all the convergence plate outlets; the outlet and the inlet are both arranged on the discharge plate, the outlet is connected to the second convergence groove, and the inlet is connected to the convergence plate inlet accordingly.

[0016] Optionally, a first sealing ring is provided on the busbar around the first bus groove;

[0017] And / or, a second sealing ring is provided on both sides of the busbar, and the second sealing ring is suitable for surrounding all the outlets of the busbar;

[0018] And / or, a third sealing ring is provided on a side of the baffle plate facing away from the second diaphragm plate, and the third sealing ring is arranged around the outer peripheral side of the baffle plate outlet.

[0019] Optionally, two groups of the diaphragm pump assemblies are symmetrically arranged at two ends of the confluence assembly;

[0020] The confluence assembly comprises a confluence cavity; the confluence cavity is penetrated by a confluence channel along its axial direction; both ends of the confluence cavity are provided with an annular confluence groove, the annular confluence groove is located on the outer peripheral side of the confluence channel, and the two annular confluence grooves are connected;

[0021] The inlet valve groove is axially arranged on the inner side of the first diaphragm plate around the diaphragm seat, and the outlet valve groove is axially arranged on the outer side of the first diaphragm plate around the diaphragm seat; the two ends of the confluence cavity are respectively connected to the two first diaphragm plates in a sealing and detachable manner, the confluence channel covers all the inlet valve grooves, and the annular confluence groove covers all the outlet valve grooves; wherein, the confluence channel and the two first diaphragm plates are combined to form the first confluence cavity, and the two annular confluence grooves and the two first diaphragm plates are combined to form the second confluence cavity; the inlet and the outlet are both arranged on the peripheral side of the confluence cavity.

[0022] Optionally, both ends of the confluence cavity are provided with a fourth sealing ring, and the fourth sealing ring is located between the confluence channel and the annular confluence groove;

[0023] And / or, both ends of the confluence cavity are provided with a fifth sealing ring, and the fifth sealing ring is arranged around the outer circumference of the annular confluence groove.

[0024] Optionally, the transmission mechanism includes a swash plate and a plunger; the swash plate is sleeved on the drive shaft and is suitable for being driven to rotate by the drive shaft; a plunger hole is provided on the diaphragm seat corresponding to each diaphragm, the plunger hole is arranged along the axial direction of the drive shaft, and the plunger hole is connected to the mounting groove; the plunger is slidably connected in the plunger hole; one end of the plunger is connected to the diaphragm, and the other end abuts against the inclined surface of the swash plate; an elastic member is provided in the plunger hole; one end of the elastic member is connected to the plunger hole, and the other end is connected to the plunger, suitable for driving the plunger to move toward the swash plate.

[0025] Optionally, one end of the drive shaft extending out of the pump body is provided with a connecting key suitable for connecting to an external drive device.

[0026] Optionally, the number of the diaphragms is set to three.

[0027] Optionally, the corners in the first confluence cavity and the second confluence cavity are both arranged with smooth transition.

[0028] The technical solution of this utility model has the following advantages:

[0029] In the utility model, when it is necessary to convey fluid, the diaphragm pump assembly is driven synchronously, and the fluid enters the first confluence chamber of the confluence assembly from the inlet, and then flows into the two groups of diaphragm pump assemblies through the two groups of first one-way valve assemblies of the first confluence chamber, and then flows into the second confluence chamber through the two groups of second one-way valve assemblies. Since the diaphragm pump assembly is driven synchronously, the fluid flows into the second confluence chamber at the same flow rate, and flows merge in the second confluence chamber until they collide with each other, so that the pressure fluctuations caused by the two groups of diaphragm pump assemblies when discharging the fluid are offset and reduced, and finally discharged at the outlet of the confluence assembly, completing the fluid conveying and pressure reducing effect. In addition, by arranging the first one-way valve assembly and the second one-way valve assembly, the flow channels flowing into the diaphragm pump assembly and flowing out of the diaphragm pump assembly are independent of each other, preventing the first confluence chamber and the second confluence chamber from circulating with each other, thereby improving the accuracy and reliability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of the plunger diaphragm pumps provided by the utility model and arranged in parallel at a first viewing angle;

[0032] Figure 2 for Figure 1 Exploded diagram of the plunger diaphragm pump in;

[0033] Figure 3 for Figure 1 Sectional view at AA;

[0034] Figure 4 for Figure 1 Sectional view at the middle BB;

[0035] Figure 5 for Figure 1 A schematic diagram of the structure of the plunger diaphragm pump at a second viewing angle;

[0036] Figure 6 A schematic diagram of the structure of a plunger-type diaphragm pump provided with a housing provided by the utility model at a third viewing angle;

[0037] Figure 7 A schematic structural diagram of a plunger-type diaphragm pump provided with a housing provided by the utility model at a first viewing angle;

[0038] Figure 8 A first side view of the discharge plate provided by the utility model;

[0039] Fig. 9 A second side view of the discharge plate provided by the utility model;

[0040] Fig.10 A first side view of the busbar provided by the utility model;

[0041] Fig.11 A second side view of the busbar provided by the utility model;

[0042] Fig.12 A first side view of the second diaphragm plate provided by the utility model;

[0043] Fig.13 A second side view of the second diaphragm plate provided by the utility model;

[0044] Fig.14 A schematic diagram of the structure of the oppositely arranged plunger diaphragm pumps provided by the utility model at a fourth viewing angle;

[0045] Fig.15 A schematic diagram of the structure of the oppositely arranged plunger diaphragm pumps provided by the utility model at a fifth viewing angle;

[0046] Fig.16 A first side view of the confluence cavity provided by the utility model;

[0047] Fig.17 This is a second side view of the confluence cavity provided by the utility model.

[0048] Description of reference numerals:

[0049] 1. Inlet; 2. Outlet; 3. Diaphragm pump assembly; 301. Pump body; 302. First diaphragm plate; 303. Diaphragm seat; 304. Diaphragm; 305. Diaphragm groove; 306. Outlet valve groove; 307. Inlet valve groove; 308. Second diaphragm plate; 309. Inclined plate; 310. Plunger; 311. Plunger hole; 312. Elastic member; 313. Drive shaft; 314. Connecting key; 315. First one-way valve; 316. Second one-way valve; 317. Bearing; 318. 8. Oil inlet; 319. Oil seal; 320. Plug; 4. Confluence plate; 5. Discharge plate; 6. First confluence groove; 7. Confluence plate inlet; 8. Confluence plate outlet; 9. Second confluence groove; 10. First sealing ring; 11. Second sealing ring; 12. Third sealing ring; 13. Confluence cavity; 14. Confluence channel; 15. Annular confluence groove; 16. First groove; 17. Second groove; 18. Third groove; 19. Fourth groove; 20. Fifth groove; 21. Bottom plate. DETAILED DESCRIPTION

[0050] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] Example 1

[0055] See also Figures 1 to 17 The present embodiment provides a plunger 310-type diaphragm 304 pump, comprising: a confluence assembly, provided with an inlet 1 and an outlet 2; a first confluence cavity and a second confluence cavity are provided in the confluence assembly; the inlet 1 is connected to the first confluence cavity, and the outlet 2 is connected to the second confluence cavity; two groups of diaphragm pump assemblies 3 are both connected to the confluence assembly; the inlet ends of the two groups of diaphragm pump assemblies 3 are both connected to the first confluence cavity; the outlet ends of the two groups of diaphragm pump assemblies 3 are both connected to the second confluence cavity; wherein, the inlet end of the diaphragm pump assembly 3 is provided with a first one-way valve assembly, and the outlet end of the diaphragm pump assembly 3 is provided with a second one-way valve assembly.

[0056] In this embodiment, when it is necessary to convey fluid, the diaphragm pump assembly 3 is driven synchronously, and the fluid enters the first confluence chamber of the confluence assembly from the inlet 1, and then flows into the two groups of diaphragm pump assemblies 3 from the first confluence chamber through the two groups of first one-way valve assemblies, and then flows into the second confluence chamber through the two groups of second one-way valve assemblies. Since the diaphragm pump assembly 3 is driven synchronously, the fluid flows into the second confluence chamber at the same flow rate, and flows and merges in the second confluence chamber until they collide, so that the pressure fluctuations caused by the two groups of diaphragm pump assemblies 3 when discharging the fluid are offset and reduced, and finally discharged at the outlet 2 of the confluence assembly, completing the fluid conveying and pressure reducing effect. In addition, by setting the first one-way valve assembly and the second one-way valve assembly, the flow channels flowing into the diaphragm pump assembly 3 and the flow channels flowing out of the diaphragm pump assembly 3 are independent of each other, preventing the first confluence chamber and the second confluence chamber from circulating with each other, thereby improving the accuracy and reliability during use.

[0057] Example 2

[0058] As a further improvement to Example 1, Figures 2 to 13 As shown, the diaphragm pump assembly 3 includes a pump body 301, a transmission mechanism, a first diaphragm plate 302 and a diaphragm seat 303; one end of the pump body 301 is connected to the diaphragm seat 303, and the other end is rotatably penetrated by a drive shaft 313 along its axial direction; the diaphragm seat 303 is provided with at least one mounting groove around its axial direction, and a diaphragm 304 is sealed and connected in the mounting groove; the transmission mechanism is located in the inner cavity of the pump body 301, and the transmission mechanism is sleeved on the drive shaft 313; the drive shaft 313 is connected to the diaphragm 304 through the transmission mechanism, and is suitable for driving the diaphragm 304 to reciprocate along the axial direction of the drive shaft 313; the first diaphragm plate 302 and the diaphragm seat 303 are provided with a sealing connection on one side of the diaphragm 304; the first diaphragm plate 302 and the diaphragm seat 303 are connected A diaphragm groove 305 is provided on one side, and the other side is connected to the confluence assembly; wherein, each diaphragm 304 is correspondingly provided with a diaphragm groove 305, and the diaphragm groove 305 and the diaphragm seat 303 are enclosed to form a diaphragm cavity; the bottom of the diaphragm groove 305 is connected to an outlet valve groove 306 and an inlet valve groove 307; each inlet valve groove 307 is connected to the first confluence cavity, and each outlet valve groove 306 is connected to the inlet valve groove 307 of the second confluence cavity; the first one-way valve assembly includes at least one first one-way valve 315, and each inlet valve groove 307 is provided with a first one-way valve 315; the second one-way valve assembly includes at least one second one-way valve 316, and each outlet valve groove 306 is provided with a second one-way valve 316.

[0059] It should be noted that the driving shaft 313 is coaxially arranged with the diaphragm seat 303 , and the diaphragm groove 305 covers the diaphragm 304 .

[0060] In this embodiment, the drive shaft 313 can be connected to an external drive device. The drive force input by the external drive device drives the drive shaft 313 to rotate, and the drive shaft 313 drives the diaphragm 304 to reciprocate along the axial direction of the drive shaft 313, thereby generating a pressure change in the diaphragm cavity. When the diaphragm 304 moves toward the side away from the diaphragm cavity, the volume of the diaphragm cavity increases and generates a negative pressure, so that the fluid is sucked into the diaphragm cavity through the first one-way valve 315. When the diaphragm 304 moves toward the side close to the diaphragm cavity, the volume of the diaphragm cavity decreases and squeezes out the fluid, so that the fluid is squeezed out of the diaphragm cavity through the second one-way valve 316.

[0061] Specifically, the diaphragm 304 is arranged in the installation groove through an annular gland, the annular gland is screwed to the installation groove, and the diaphragm 304 is clamped between the groove bottom of the installation groove and the annular gland, so as to facilitate installation and disassembly.

[0062] Furthermore, the inner diameter of the annular pressure cover is smaller than the inner diameter of the diaphragm groove 305, the outer diameter of the annular pressure cover is larger than the inner diameter of the diaphragm groove 305, and a sixth sealing ring is embedded on the side of the annular pressure cover facing the diaphragm groove 305, and the inner diameter of the sixth sealing ring is larger than the inner diameter of the diaphragm groove 305.

[0063] Based on the above implementation, in a preferred implementation, Figures 1 to 7 As shown, two groups of diaphragm pump assemblies 3 are arranged side by side in parallel, and the two first diaphragm plates 302 are integrated into a second diaphragm plate 308; the confluence assembly includes a confluence plate 4 and a discharge plate 5; one side of the confluence plate 4 is sealed and detachably connected to the discharge plate 5, and the other side is sealed and detachably connected to the second diaphragm plate 308; the inlet valve groove 307 is axially arranged on the inner side of the first diaphragm plate 302 around the diaphragm seat 303, and the outlet valve groove 306 is axially arranged on the outer side of the first diaphragm plate 302 around the diaphragm seat 303; the first confluence is recessed on the side where the confluence plate 4 is connected to the second diaphragm plate 308 The flow groove 6 is formed together with the second diaphragm plate 308 to form a first confluence cavity; the first confluence groove 6 covers all the inlet valve grooves 307; a confluence plate inlet 7 is provided at the bottom of the first confluence groove 6; a confluence plate outlet 8 is provided on the confluence plate 4 corresponding to each outlet valve groove 306; a second confluence groove 9 is recessed on the side where the discharge plate 5 is connected to the confluence plate 4, and the second confluence groove 9 is formed together with the confluence plate 4 to form a second confluence cavity; the second confluence groove 9 covers all the confluence plate outlets 8; the outlet 2 and the inlet 1 are both arranged on the discharge plate 5, the outlet 2 is connected to the second confluence groove 9, and the inlet 1 is connected to the confluence plate inlet 7 accordingly.

[0064] It should be noted that, since the inlet valve slot 307 is located on the inner side of the first diaphragm plate 302 and the outlet valve slot 306 is located on the outer side of the first diaphragm plate 302 , it is convenient for the first confluence groove 6 to cover the inlet valve slot 307 alone, thereby being independently separated from the outlet valve slot 306 .

[0065] In this embodiment, two groups of diaphragm pump assemblies 3 are arranged side by side in parallel, that is, two first diaphragm plates 302 are aligned and arranged, and at the same time, the two first diaphragm plates 302 are arranged in an integrated manner, which is convenient for connecting the two groups of diaphragm pump assemblies 3, improving the structural strength and reducing the cost. When it is necessary to transport the fluid, the diaphragms 304 on the two groups of diaphragm pump assemblies 3 are driven to reciprocate by the drive shaft 313 through the transmission mechanism, and the fluid enters the first confluence groove 6 from the inlet 1 on the discharge plate 5 through the confluence plate inlet 7, that is, flows into the first confluence cavity, and then is divided by the first confluence cavity. The fluid flows into the diaphragm cavity of the two diaphragm pump assemblies 3 through the first one-way valves 315 of the two diaphragm pump assemblies 3, and then flows from the diaphragm cavity through the second one-way valve 316 and the manifold outlet 8 into the second confluence groove 9 of the discharge plate 5, that is, flows into the second confluence cavity. The fluid discharged from the two diaphragm pump assemblies 3 merges and collides under the guidance of the second confluence groove 9, so that the pressure fluctuations caused by the discharge of the fluid by the two diaphragm pump assemblies 3 offset each other and are reduced, and finally discharged from the outlet 2 on the discharge plate 5, completing the fluid transportation and pressure reduction effect.

[0066] Specifically, the outlet 2 is located in the middle of the second confluence groove 9, which ensures the uniformity of the fluids when they merge, and further improves the pressure fluctuation elimination effect and stability.

[0067] Specifically, the inlet 1 is located in the middle of the first confluence groove 6 to ensure uniformity of fluid inflow and further improve the pressure fluctuation elimination effect and stability.

[0068] Based on the above implementation, in a preferred implementation, Figure 4 As shown, a first sealing ring 10 is provided on the busbar 4 around the first busbar groove 6 .

[0069] It should be noted that the first sealing ring 10 is located between the first manifold groove 6 and the manifold plate outlet 8 .

[0070] In this embodiment, the first sealing ring 10 is used to further improve the sealing performance and prevent the first confluence cavity and the second confluence cavity from being connected.

[0071] Specifically, Fig.10 and Fig.11 As shown, a first groove 16 is provided on the busbar 4 corresponding to the first sealing ring 10 , so that the first sealing ring 10 can be easily embedded in the first groove 16 , thereby facilitating installation and removal.

[0072] Based on the above implementation, in a preferred implementation, Figure 4 As shown, second sealing rings 11 are provided on both sides of the manifold 4 , and the second sealing rings 11 are suitable for surrounding all manifold outlets 8 .

[0073] In this embodiment, the second sealing ring 11 is used to further improve the sealing performance, thereby preventing the fluid from leaking from between the manifold plate 4 and the second diaphragm plate 308 or between the manifold plate 4 and the discharge plate 5 .

[0074] Specifically, Fig.10 and Fig.11 As shown, a second groove 17 is provided on the busbar 4 corresponding to the second sealing ring 11, so that the second sealing ring 11 can be easily embedded in the second groove 17, thereby facilitating installation and removal.

[0075] Based on the above implementation, in a preferred implementation, Figure 4 As shown, a third sealing ring 12 is provided on the side of the manifold 4 facing away from the second diaphragm plate 308 , and the third sealing ring 12 is arranged around the outer peripheral side of the manifold outlet 8 .

[0076] In this embodiment, by providing a third sealing ring 12, the sealing performance between the manifold 4 and the discharge plate 5 is improved to prevent the fluid passing through the manifold inlet 7 from flowing into the manifold outlet 8, and further prevent the first manifold cavity from communicating with the second manifold cavity.

[0077] Specifically, Fig.10 and Fig.11 As shown, a third groove 18 is provided on the busbar 4 corresponding to the third sealing ring 12, so that the third sealing ring 12 can be easily embedded in the third groove 18, thereby facilitating installation and removal.

[0078] Specifically, it also includes a bottom plate 21, and the two groups of diaphragm pump assemblies 3 are arranged on the bottom plate 21, so as to further improve the stability.

[0079] Specifically, the diaphragm seat 303, the manifold 4, the second diaphragm plate 308 and the discharge plate 5 are provided with a plurality of connection holes, and screws can be passed through the discharge plate 5, the manifold 4, the second diaphragm plate 308 and the diaphragm seat 303 in sequence and connected to the pump body 301, so as to facilitate installation and disassembly.

[0080] As a convertible implementation method, it can also be, for example Fig.14 and Fig.15As shown, two groups of diaphragm pump components 3 are symmetrically arranged at the two ends of the confluence component; the confluence component includes a confluence cavity 13; the confluence cavity 13 is penetrated by a confluence channel 14 along its axial direction; both ends of the confluence cavity 13 are provided with annular confluence grooves 15, the annular confluence grooves 15 are located on the outer peripheral side of the confluence channel 14, and the two annular confluence grooves 15 are connected; the inlet valve groove 307 is arranged on the inner side of the first diaphragm plate 302 around the axial direction of the diaphragm seat 303, and the outlet valve groove 306 is arranged around the axial direction of the diaphragm seat 303. It is arranged on the outside of the first diaphragm plate 302; the two ends of the confluence cavity 13 are respectively connected to the two first diaphragm plates 302 in a sealed and detachable manner, the confluence channel 14 covers all the inlet valve grooves 307, and the annular confluence groove 15 covers all the outlet valve grooves 306; wherein, the confluence channel 14 and the two first diaphragm plates 302 are enclosed to form a first confluence cavity, and the two annular confluence grooves 15 and the two first diaphragm plates 302 are enclosed to form a second confluence cavity; the inlet 1 and the outlet 2 are both arranged on the peripheral side of the confluence cavity 13.

[0081] It should be noted that since the diaphragm 304 is arranged axially around the diaphragm seat 303, and the inlet valve groove 307 is located on the inner side of the first diaphragm plate 302, and the outlet valve groove 306 is located on the outer side of the first diaphragm plate 302, when the inlet valve groove 307 and the outlet valve groove 306 are set in multiple numbers, they are arranged in a circular shape, which makes it convenient for the confluence channel 14 to separately cover all the inlet valve grooves 307 and be independently separated from the outlet valve groove 306, and at the same time makes it convenient for the annular confluence groove 15 to cover all the outlet valve grooves 306.

[0082] In this embodiment, the two groups of diaphragm pump assemblies 3 can be arranged opposite to each other, and can be applied to scenarios where this structure is required. When in use, the diaphragms 304 on the two groups of diaphragm pump assemblies 3 are driven to reciprocate by the drive shaft 313 through the transmission mechanism, and the fluid flows into the confluence channel 14 from the inlet 1 on the confluence cavity 13, and then flows into the diaphragm cavity from the confluence channel 14 through the first one-way valves 315 at both ends, and then is squeezed out by the second one-way valve 316 in the diaphragm cavity, through the annular confluence grooves 15 at both ends of the confluence cavity 13, and converges and collides under the guidance of the two annular confluence grooves 15, so that the pressure fluctuations caused by the two groups of diaphragm pump assemblies 3 when discharging the fluid offset each other and reduce, and finally discharged from the outlet 2 on the confluence cavity 13, completing the fluid transportation and pressure reduction effect.

[0083] On the basis of the above-mentioned embodiment, in a preferred embodiment, fourth sealing rings are provided at both ends of the confluence cavity 13 , and the fourth sealing ring is located between the confluence channel 14 and the annular confluence groove 15 .

[0084] In this embodiment, the fourth sealing ring is used to improve the sealing performance and separate the confluence channel 14 from the annular confluence groove 15, that is, to prevent the first confluence cavity and the second confluence cavity from being connected.

[0085] Specifically, Fig.16 and Fig.17 As shown, a fourth groove 19 is provided on the confluence cavity 13 corresponding to the fourth sealing ring, so that the fourth sealing ring can be embedded in the fourth groove 19 for easy installation and removal.

[0086] Based on the above implementation, in a preferred implementation, Fig.16 and Fig.17 As shown, both ends of the confluence cavity 13 are provided with fifth sealing rings, and the fifth sealing ring is arranged around the outer circumference of the annular confluence groove 15 .

[0087] In this embodiment, the fifth sealing ring is used to improve the sealing performance and prevent the fluid in the annular confluence groove 15 from flowing out of the confluence cavity 13 .

[0088] Specifically, Fig.16 and Fig.17 As shown, a fifth groove 20 is provided on the confluence cavity 13 corresponding to the fifth sealing ring, so that the fifth sealing ring can be embedded in the fifth groove 20 for easy installation and removal.

[0089] Specifically, the confluence cavity 13 is screwed to the first diaphragm plate 302, which is convenient for installation and disassembly.

[0090] On the basis of the above-mentioned embodiment, in a preferred embodiment, the transmission mechanism includes a swash plate 309 and a plunger 310; the swash plate 309 is sleeved on the drive shaft 313 and is suitable for being driven to rotate by the drive shaft 313; a plunger hole 311 is provided on the diaphragm seat 303 corresponding to each diaphragm 304, the plunger hole 311 is arranged along the axial direction of the drive shaft 313, and the plunger hole 311 is connected to the mounting groove; the plunger 310 is slidably connected in the plunger hole 311; one end of the plunger 310 is connected to the diaphragm 304, and the other end abuts against the inclined surface of the swash plate 309; an elastic member 312 is provided in the plunger hole 311; one end of the elastic member 312 is connected to the plunger hole 311, and the other end is connected to the plunger 310, which is suitable for driving the plunger 310 to move toward the swash plate 309.

[0091] It should be noted that the inclined surface of the swash plate 309 faces the diaphragm 304 , and the plunger 310 is located between the diaphragm 304 and the swash plate 309 .

[0092] In this embodiment, when it is necessary to drive the diaphragm 304 to reciprocate, the swash plate 309 is driven to rotate through the drive shaft 313. Due to the action of the elastic member 312, the plunger 310 always keeps in contact with the inclined surface of the swash plate 309. Then, when the swash plate 309 rotates, the position of the plunger 310 on the inclined surface of the swash plate 309 changes, so that the plunger 310 drives the diaphragm 304 to reciprocate. When the number of diaphragms 304 is set to multiple, the number of plungers 310 is also set to multiple accordingly, and the working principle is the same as above.

[0093] Specifically, the elastic member 312 is a compression spring.

[0094] Based on the above embodiment, in a preferred embodiment, the number of the diaphragms 304 is set to three.

[0095] In this embodiment, this embodiment does not limit the number of diaphragms 304. The number of diaphragms 304 is preferably three, and the corresponding number of mounting grooves is set to three. By increasing the number of diaphragms 304, the fluid conveying capacity is improved. The number of diaphragms 304 can also be set to one, two, four, five or more. The specific technical personnel in this field can make a choice according to the actual situation.

[0096] On the basis of the above-mentioned implementation manner, in a preferred implementation manner, the corners in the first confluence cavity and the second confluence cavity are both smoothly transitioned.

[0097] In this embodiment, by adopting a smooth transition setting at the corners in the first confluence chamber and the second confluence chamber, the fluid can flow smoothly in the first confluence chamber and the second confluence chamber, avoiding material accumulation or precipitation at corners and other locations due to poor flow, ensuring that it can be directly cleaned with water without disassembly, ensuring that the fluid flows smoothly and unobstructed inside, and reducing the pressure fluctuations caused by the collision between the fluid and the internal flow channel structure.

[0098] Specifically, the corners of the first confluence groove 6 and the second confluence cavity groove are both smoothly transitioned, and the confluence plate outlet 8 and the confluence plate inlet 7 are both smoothly transitioned. It should be noted that the smooth transition can be an arc chamfer.

[0099] On the basis of the above-mentioned embodiment, in a preferred embodiment, a connection key 314 is provided at one end of the driving shaft 313 extending out of the pump body 301, which is suitable for connecting with an external driving device.

[0100] In this embodiment, a connecting key 314 is provided on the driving shaft 313 to facilitate connection with an external driving device. At the same time, the initial position of the driving shaft 313 can be observed through the connecting key 314, so that the driving shafts 313 of the two groups of diaphragm pump assemblies 3 can be adjusted to the same position, so that the driving shafts 313 can be driven to rotate at the same speed, so that the speed direction of the fluid flowing into the confluence assembly is synchronized, thereby ensuring the pressure elimination effect and improving stability.

[0101] Specifically, one end of the driving shaft 313 extends into the pump body 301 and is rotatably connected to the diaphragm seat 303 , and the other end extends out of the pump body 301 .

[0102] Specifically, Figure 2 and Figure 4As shown, a bearing 317 is provided in the pump body 301 , and the drive shaft 313 passes through the bearing 317 , so as to support the drive shaft 313 and drive the drive shaft 313 to rotate.

[0103] Specifically, Figure 2 and Figure 4 As shown, an oil seal 319 is also provided on the pump body 301, and the drive shaft 313 passes through the oil seal 319, so as to improve the sealing performance, prevent oil leakage, and avoid the risk of oil leakage inside the pump body 301 during disassembly.

[0104] Specifically, Figure 2 and Figure 4 As shown, the pump body 301 is provided with an oil inlet 318 to facilitate the input of oil and improve the smoothness during driving.

[0105] Specifically, Figure 2 and Figure 4 As shown, the pump body 301 is provided with an oil outlet, and the oil outlet is detachably connected with a plug 320 to facilitate the discharge of oil for replacement.

[0106] Specifically, Figure 6 and Figure 7 As shown, when two groups of diaphragm pump assemblies 3 are arranged side by side in parallel, the two pump bodies are connected by a shell to improve the structural strength and stability. A first opening connected to the oil inlet 318 is correspondingly provided on the shell to facilitate the input of oil. A second opening connected to the oil outlet is provided on the shell to facilitate the passage of the plug 320.

[0107] The specific working principle of the plunger 310 diaphragm 304 pump provided in this embodiment is as follows: according to the actual situation, the structure of two groups of diaphragm pump components 3 arranged side by side in parallel or two groups of diaphragm pump components 3 arranged opposite to each other can be adaptively selected, and the application range is wide. This embodiment takes the structure of two groups of diaphragm pump components 3 arranged side by side in parallel as an example for explanation. When it is necessary to transport fluid, the connecting keys 314 on the driving shafts 313 on the two groups of diaphragm pump components 3 are synchronously aligned in the same direction, and then the two driving shafts 313 are synchronously driven to rotate in opposite directions and at the same speed through an external driving device, and the driving shaft 313 drives the inclined plate 309 to rotate to drive the plunger 310 to drive the diaphragm 304 to reciprocate, and the fluid enters the first confluence groove 6 from the inlet 1 on the discharge plate 5 through the confluence plate inlet 7, that is, it flows into the first confluence cavity, and then is divided by the first confluence cavity The fluid flows into the diaphragm cavity of the two diaphragm pump assemblies 3 through the first one-way valve 315 of the two diaphragm pump assemblies 3, and then flows into the second confluence groove 9 of the discharge plate 5 through the diaphragm cavity through the second one-way valve 316 and the confluence plate outlet 8, that is, flows into the second confluence cavity. The fluid discharged from the two diaphragm pump assemblies 3 merges and collides under the guidance of the second confluence groove 9, so that the pressure fluctuations caused by the discharge of the two diaphragm pump assemblies 3 offset each other and are finally discharged at the outlet 2 on the discharge plate 5, completing the fluid delivery and pressure reduction effect. In addition, by setting the first one-way valve 315 and the second one-way valve 316, the flow channels flowing into the diaphragm pump assembly 3 and flowing out of the diaphragm pump assembly 3 are independent of each other, preventing the first confluence cavity and the second confluence cavity from flowing mutually, improving the accuracy and reliability during use, and the diaphragm pump assembly 3 and the confluence assembly have good sealing performance. The existing plunger 310 diaphragm 304 pump equipment solves the technical problem that due to its delivery characteristics, it is easy to produce a large pressure fluctuation phenomenon in the pipeline, affecting the transmission of the fluid.

[0108] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A plunger diaphragm pump, characterized in that: include: A confluence assembly having an inlet (1) and an outlet (2); The confluence assembly is provided with a first confluence cavity and a second confluence cavity; The inlet (1) is in communication with the first confluence chamber, and the outlet (2) is in communication with the second confluence chamber; Two groups of diaphragm pump assemblies (3) are both connected to the flow confluence assembly; the inlet ends of the two groups of diaphragm pump assemblies (3) are both in communication with the first flow confluence cavity; and the outlet ends of the two groups of diaphragm pump assemblies (3) are both in communication with the second flow confluence cavity; Wherein, the inlet end of the diaphragm pump assembly (3) is provided with a first one-way valve assembly, and the outlet end of the diaphragm pump assembly (3) is provided with a second one-way valve assembly.

2. The plunger diaphragm pump according to claim 1, characterized in that: The diaphragm pump assembly (3) comprises a pump body (301), a transmission mechanism, a first diaphragm plate (302) and a diaphragm seat (303); One end of the pump body (301) is connected to the diaphragm seat (303), and the other end is rotatably provided with a drive shaft (313) along its axial direction; the diaphragm seat (303) is provided with at least one installation groove around its axial direction, and the diaphragm (304) is sealed and connected in the installation groove; The transmission mechanism is located in the inner cavity of the pump body (301), and the transmission mechanism is sleeved on the drive shaft (313); the drive shaft (313) is connected to the diaphragm (304) through the transmission mechanism, and is suitable for driving the diaphragm (304) to reciprocate along the axial direction of the drive shaft (313); The first diaphragm plate (302) and the diaphragm seat (303) are sealedly connected on one side of which the diaphragm (304) is provided; the first diaphragm plate (302) is provided with a diaphragm groove (305) on one side connected to the diaphragm seat (303), and the other side is connected to the confluence assembly; wherein each diaphragm (304) is provided with a corresponding diaphragm groove (305), and the diaphragm groove (305) and the diaphragm seat (303) are enclosed to form a diaphragm cavity; the bottom of the diaphragm groove (305) is connected to an outlet valve groove (306) and an inlet valve groove (307); each inlet valve groove (307) is connected to the first confluence cavity, and each outlet valve groove (306) is connected to the inlet valve groove (307) of the second confluence cavity; The first one-way valve assembly includes at least one first one-way valve (315), and each of the inlet valve grooves (307) is provided with one of the first one-way valves (315); the second one-way valve assembly includes at least one second one-way valve (316), and each of the outlet valve grooves (306) is provided with one of the second one-way valves (316).

3. The plunger diaphragm pump according to claim 2, characterized in that: Two groups of the diaphragm pump assemblies (3) are arranged side by side in parallel, and the two first diaphragm plates (302) are integrated into a second diaphragm plate (308); the manifold assembly comprises a manifold plate (4) and a discharge plate (5); one side of the manifold plate (4) is connected to the discharge plate (5) in a sealed and detachable manner, and the other side of the manifold plate (4) is connected to the second diaphragm plate (308) in a sealed and detachable manner; The inlet valve groove (307) is arranged on the inner side of the first diaphragm plate (302) in an axial direction around the diaphragm seat (303), and the outlet valve groove (306) is arranged on the outer side of the first diaphragm plate (302) in an axial direction around the diaphragm seat (303); a first confluence groove (6) is recessed on one side of the confluence plate (4) connected to the second diaphragm plate (308), and is enclosed with the second diaphragm plate (308) to form the first confluence cavity; the first confluence groove (6) covers all the inlet valve grooves (307); a confluence plate inlet (7) is provided at the bottom of the first confluence groove (6); a confluence plate outlet (8) is provided on the confluence plate (4) corresponding to each of the outlet valve grooves (306); A second confluence groove (9) is recessed on one side of the discharge plate (5) connected to the confluence plate (4), and is enclosed with the confluence plate (4) to form the second confluence cavity; the second confluence groove (9) covers all the confluence plate outlets (8); the outlet (2) and the inlet (1) are both arranged on the discharge plate (5), the outlet (2) is connected to the second confluence groove (9), and the inlet (1) is correspondingly connected to the confluence plate inlet (7).

4. The plunger diaphragm pump according to claim 3, characterized in that: A first sealing ring (10) is provided on the busbar (4) surrounding the first busbar groove (6); And / or, a second sealing ring (11) is provided on both sides of the busbar (4), and the second sealing ring (11) is suitable for surrounding all the busbar outlets (8); And / or, a third sealing ring (12) is provided on the side of the manifold (4) facing away from the second diaphragm plate (308), and the third sealing ring (12) is arranged around the outer peripheral side of the manifold outlet (8).

5. The plunger diaphragm pump according to claim 2, characterized in that: Two groups of diaphragm pump assemblies (3) are symmetrically arranged at two ends of the flow confluence assembly; The confluence assembly comprises a confluence cavity (13); the confluence cavity (13) is penetrated by a confluence channel (14) along its axial direction; an annular confluence groove (15) is provided at both ends of the confluence cavity (13), the annular confluence groove (15) is located on the outer peripheral side of the confluence channel (14), and the two annular confluence grooves (15) are connected; The inlet valve groove (307) is axially arranged on the inner side of the first diaphragm plate (302) around the diaphragm seat (303), and the outlet valve groove (306) is axially arranged on the outer side of the first diaphragm plate (302) around the diaphragm seat (303); the two ends of the confluence cavity (13) are respectively connected to the two first diaphragm plates (302) in a sealed and detachable manner, the confluence channel (14) covers all the inlet valve grooves (307), and the annular confluence groove (15) covers all the outlet valve grooves (306); wherein, the confluence channel (14) and the two first diaphragm plates (302) are combined to form the first confluence cavity, and the two annular confluence grooves (15) and the two first diaphragm plates (302) are combined to form the second confluence cavity; the inlet (1) and the outlet (2) are both arranged on the peripheral side of the confluence cavity (13).

6. The plunger diaphragm pump according to claim 5, characterized in that: A fourth sealing ring is provided at both ends of the confluence cavity (13), and the fourth sealing ring is located between the confluence channel (14) and the annular confluence groove (15); And / or, both ends of the confluence cavity (13) are provided with a fifth sealing ring, and the fifth sealing ring is arranged around the outer peripheral side of the annular confluence groove (15).

7. The plunger diaphragm pump according to claim 2, characterized in that: The transmission mechanism comprises a swash plate (309) and a plunger (310); the swash plate (309) is sleeved on the drive shaft (313) and is suitable for being driven to rotate by the drive shaft (313); a plunger hole (311) is provided on the diaphragm seat (303) corresponding to each diaphragm (304), the plunger hole (311) is arranged along the axial direction of the drive shaft (313), and the plunger hole (311) is communicated with the mounting groove; the plunger ( The plunger (310) is slidably connected in the plunger hole (311); one end of the plunger (310) is connected to the diaphragm (304), and the other end abuts against the inclined surface of the swash plate (309); an elastic member (312) is provided in the plunger hole (311); one end of the elastic member (312) is connected to the plunger hole (311), and the other end is connected to the plunger (310), and is suitable for driving the plunger (310) to move toward the swash plate (309).

8. The plunger diaphragm pump according to claim 2, characterized in that: One end of the driving shaft (313) extending out of the pump body (301) is provided with a connecting key (314) suitable for connecting to an external driving device.

9. The plunger diaphragm pump according to any one of claims 2 to 8, characterized in that: The number of the diaphragms (304) is set to three.

10. The plunger diaphragm pump according to any one of claims 2 to 8, characterized in that: The corners of the first confluence cavity and the second confluence cavity are both arranged with smooth transition.

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