Miniature diaphragm pump

Abstract

The invention relates to the technical field of miniature diaphragm pumps, in particular to a miniature diaphragm pump which comprises a diaphragm pump body and a miniature motor, a water outlet pipe and a water inlet pipe are fixedly connected to the upper side of the diaphragm pump body, a plurality of water inlet holes and a plurality of water return holes are formed in the diaphragm pump body, one side of each adjacent water inlet hole is connected with a check valve, and the check valves are connected with the miniature motor. The diaphragm pump body comprises a first pump body, a second pump body, a third pump body and a fourth pump body are sequentially connected to the upper side of the first pump body in an embedded mode, a non-return pressure relief assembly is connected between the water outlet pipe and the water inlet pipe, and the non-return pressure relief assembly is used for preventing backflow and has the pressure relief function. And a driving assembly matched with the micro motor to output water from the water outlet pipe is connected between the first pump body and the second pump body. According to the technical scheme, the integrated non-return pressure relief assembly is adopted, and excessive features can be prevented from being arranged in the pump body, so that the complexity of the structure in the pump body is reduced, and the service life of the whole diaphragm pump is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of micro diaphragm pumps, and in particular to a micro diaphragm pump. Background Art

[0002] A diaphragm pump is a pump that uses the motion principle of a flexible diaphragm to transport fluids. Its working mechanism mainly relies on the reciprocating motion of the diaphragm, which allows the liquid to be sucked in and out of the pump chamber. Diaphragm pumps are widely used in many industries such as chemical, pharmaceutical, food and water treatment due to their excellent sealing performance and self-priming ability, especially when dealing with toxic, corrosive or high-viscosity liquids. Micro diaphragm pumps are a miniaturized version of diaphragm pumps, usually used in applications with small flow requirements and limited space. They are compact and often used in laboratory equipment, medical instruments and small automation equipment. Micro diaphragm pumps can accurately transport liquids at extremely low flow rates and pressures, and are suitable for transporting sensitive liquids such as biological reagents or drugs. Its small size and flexible design make it play an important role in modern scientific and industrial applications.

[0003] In the prior art, micro diaphragm pumps are usually equipped with a check valve to prevent fluid backflow, thereby protecting the equipment and users from harm. However, in some medical instruments, a micro diaphragm pump with a faster flow rate is required to achieve a specific effect. Too fast a flow rate may cause excessive pressure inside the pump. Existing micro diaphragm pumps are often equipped with a pressure relief component separated from the check valve to relieve excessive pressure. This design requires more features and components inside the micro diaphragm pump, making it more prone to damage during use and reducing its service life. Summary of the invention

[0004] The present invention provides a micro diaphragm pump, which can avoid setting too many features inside the pump body, thereby reducing the complexity of the structure inside the pump body and increasing the service life of the entire diaphragm pump.

[0005] The technical solution of the present invention is as follows:

[0006] A micro diaphragm pump comprises a diaphragm pump body and a micro motor, wherein a water outlet pipe and a water inlet pipe are fixedly connected to the upper side of the diaphragm pump body, a plurality of water inlet holes and a plurality of water return holes are arranged in the diaphragm pump body, and a non-conducting valve is connected to one side of each of the adjacent water inlet holes;

[0007] The diaphragm pump body comprises a first pump body, the upper side of which is sequentially connected with a second pump body, a third pump body and a fourth pump body, a check pressure relief assembly is connected between the water outlet pipe and the water inlet pipe, and the check pressure relief assembly is used to prevent backflow and has a pressure relief function;

[0008] A driving assembly is connected between the first pump body and the second pump body and cooperates with the micro motor to output water from the water outlet pipe;

[0009] The micro motor is fixedly connected to the lower end of the diaphragm pump body.

[0010] Further, the non-return pressure relief assembly includes a water guide plate, the water guide plate is rotatably connected to the inner wall of the fourth pump body, the water guide plate is provided with a plurality of water flow grooves, a linkage plate is clamped on the upper side of the water guide plate, a pressure relief valve is fixedly connected to the lower side of the linkage plate, and a plurality of pressure relief grooves are provided on the linkage plate;

[0011] A check sleeve is rotatably connected to the upper side of the water guide plate, and a check ring is fixedly connected to the outer ring of the check sleeve.

[0012] Furthermore, the pressure relief valve includes a pressure relief column, the shape of which is a truncated cone that gradually shrinks away from the linkage disk, and a pressure measuring disk is fixedly connected to the lower end of the pressure relief column.

[0013] Furthermore, a plurality of first water guide blades are fixedly connected to the lower side of the water guide plate, a plurality of engaging grooves are opened on the upper side of the water guide plate, a plurality of second water guide blades are fixedly connected to the lower side of the linkage plate, and each of the second water guide blades abuts against the inner wall of each adjacent engaging groove.

[0014] Furthermore, a locking sleeve is fixedly connected to the side of the linkage plate away from the water guide plate, a connecting plate is fixedly connected to the inner wall of the water outlet pipe, a locking sleeve is fixedly connected to the lower side of the connecting plate, and the inner ring of the locking sleeve is threadedly connected to the locking sleeve;

[0015] A pressure relief pipe is fixedly connected to the upper side of the connecting plate, and the pressure relief pipe is fixedly connected to the water outlet pipe.

[0016] Furthermore, the locking sleeve is provided with a plurality of locking grooves.

[0017] Further, the driving assembly includes a driving sleeve, the driving sleeve is fixedly connected to the input shaft of the micro motor, a linkage sleeve is abutted on the upper side of the driving sleeve, a reset column is connected to the inner thread of the driving sleeve, one end of the reset column away from the driving sleeve is slidably connected to the linkage sleeve, a reset spring is arranged in the linkage sleeve, and two ends of the reset spring are respectively abutted against the inner wall of the linkage sleeve and the reset column;

[0018] A plurality of pressurizing pistons are slidably connected to the upper side of the linkage sleeve, and each of the pressurizing pistons is slidably connected to the inner wall of the second pump body.

[0019] Furthermore, a plurality of screws are rotatably connected to the second pump body, the third pump body and the fourth pump body, and the lower end of each screw is threadedly connected to the first pump body.

[0020] The beneficial effects of the present invention are:

[0021] In order to solve the pressure problem caused by high flow rate, the micro diaphragm pump is equipped with a check pressure relief assembly. The main function of this assembly is to release excessive pressure in time to protect the pump body and internal parts from damage, and it also has the function of a one-way check valve. Since the volume of the diaphragm pump is small, the assembly adopts an integrated design, which can avoid setting too many features inside the pump body, thereby reducing the complexity of the structure inside the pump body. This design makes the pump less likely to fail during use than the existing separate pump body, thereby increasing the service life of the entire diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 It is a schematic diagram of the present invention;

[0024] Figure 2 This is a partial cutaway diagram of the present invention. Figure 1 ;

[0025] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0026] Figure 4 This is a partial cutaway diagram of the present invention. Figure 2 ;

[0027] Figure 5 for Figure 4 A magnified schematic diagram of B;

[0028] Figure 6 This is a partial cutaway diagram of the present invention. Figure 3 ;

[0029] Figure 7 This is a partial cutaway diagram of the present invention. Figure 4 ;

[0030] Figure 8 This is a partial cutaway diagram of the present invention. Figure 5 .

[0031] In the figure: 11, diaphragm pump body; 12, micro motor; 13, water outlet pipe; 14, water inlet pipe; 15, water inlet hole; 16, water return hole; 17, check valve; 18, screw; 21, first pump body; 22, second pump body; 23, third pump body; 24, fourth pump body; 31, water guide plate; 311, first water guide blade; 312, fitting groove; 32, water flow groove; 33, linkage plate; 331, second water guide blade; 34, pressure relief valve; 341, pressure relief column; 342, pressure measuring plate; 35, pressure relief groove; 36, check sleeve; 37, check ring; 41, positioning sleeve; 42, connecting plate; 43, positioning sleeve; 44, pressure relief pipe; 45, positioning groove; 51, driving sleeve; 52, linkage sleeve; 53, reset column; 54, reset spring; 55, pressurizing piston. DETAILED DESCRIPTION

[0032] The following will be combined with 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.

[0033] Example

[0034] like Figures 1 to 8 As shown, this embodiment proposes a micro diaphragm pump, including a diaphragm pump body 11 and a micro motor 12, a water outlet pipe 13 and a water inlet pipe 14 are fixedly connected to the upper side of the diaphragm pump body 11, a plurality of water inlet holes 15 and a plurality of water return holes 16 are arranged in the diaphragm pump body 11, and a non-passing valve 17 is connected to one side of each adjacent water inlet hole 15;

[0035] The diaphragm pump body 11 includes a first pump body 21, and the second pump body 22, the third pump body 23 and the fourth pump body 24 are sequentially connected to the upper side of the first pump body 21. A check pressure relief assembly is connected between the water outlet pipe 13 and the water inlet pipe 14. The check pressure relief assembly is used to prevent backflow and has a pressure relief function.

[0036] A driving assembly that cooperates with the micro motor 12 to output water from the water outlet pipe 13 is connected between the first pump body 21 and the second pump body 22;

[0037] The micro motor 12 is fixedly connected to the lower end of the diaphragm pump body 11;

[0038] In order to solve the pressure problem caused by high flow rate, the micro diaphragm pump 11 is equipped with a non-return pressure relief assembly. The main function of this assembly is to release excessive pressure in time to protect the pump body and internal parts from damage, and it also has the function of a one-way check valve. Since the volume of the diaphragm pump body 11 is relatively small, the assembly adopts an integrated design, which can avoid setting too many features inside the pump body, thereby reducing the complexity of the structure inside the pump body. This design makes the pump less prone to failure during use than the existing separate pump body, thereby increasing the service life of the entire diaphragm pump.

[0039] like Figure 2 to Figure 5 and Figure 7-8 As shown, the check pressure relief assembly includes a water guide plate 31, which is rotatably connected to the inner wall of the fourth pump body 24, a plurality of water flow grooves 32 are provided on the water guide plate 31, a linkage plate 33 is clamped on the upper side of the water guide plate 31, a pressure relief valve 34 is fixedly connected to the lower side of the linkage plate 33, and a plurality of pressure relief grooves 35 are provided on the linkage plate 33;

[0040] The check sleeve 36 is rotatably connected to the upper side of the water guide plate 31, and the check ring 37 is fixedly connected to the outer ring of the check sleeve 36. The outer ring of the check ring 37 is in close contact with the inner wall of the outer ring of the fourth pump body 24.

[0041] Under the action of the driving component, the flowing water presses the water drawn from the water inlet 15 into the cavity between the lower side of the water guide plate 31 and the fourth pump body 24. The water pressure of this part of the flowing water is less than the rated water pressure in the diaphragm pump body 11, and the water will flow along the inner wall of the inner ring of the fourth pump body 24 through the water flow groove 32. Preferably, the check ring 37 is set to a rubber material, so that the water pressure on the lower side can separate the check ring 37 from the inner wall of the inner ring of the fourth pump body 24, thereby causing the water to be discharged to the upper side, but the water pressure on the upper side of the check ring 37 cannot The check ring 37 is separated from the inner wall of the inner circle of the fourth pump body 24, that is, the check ring 37 at this time acts as a check valve, which is used to prevent the water discharged from the water outlet pipe 13 from flowing back into the diaphragm pump body 11, and then cooperates with the pressure relief valve 34. When the water pressure in the diaphragm pump body 11 exceeds the rated pressure, this pressure will prompt the pressure relief valve 34 to move, and then through the movement of the pressure relief valve 34, the excessive water pressure can be discharged through the linkage disk 33, which effectively prevents excessive pressure from damaging the equipment, thereby increasing the service life of the equipment.

[0042] like Figure 2 to Figure 5 and Figure 7-8 As shown, the pressure relief valve 34 includes a pressure relief column 341, the shape of the pressure relief column 341 is a truncated cone that gradually shrinks away from the linkage disk 33, and the pressure measuring disk 342 is fixedly connected to the lower end of the pressure relief column 341;

[0043] When the pressure measuring plate 342 is subjected to the water pressure, it will move in the direction of water discharge, and then move upward with the linkage plate 33 through the pressure relief column 341. The gradual upward movement of the pressure relief column 341 will cause the gap between the conical surface of the pressure relief column 341 and the linkage plate 33 to gradually increase, thereby allowing the water flow to be discharged more quickly, effectively reducing the water pressure in the diaphragm pump body 11 and ensuring the service life of the equipment.

[0044] like Figure 7 As shown, a plurality of first water guide blades 311 are fixedly connected to the lower side of the water guide plate 31, a plurality of interlocking grooves 312 are provided on the upper side of the water guide plate 31, a plurality of second water guide blades 331 are fixedly connected to the lower side of the linkage plate 33, and each second water guide blade 331 abuts against the inner wall of each adjacent interlocking groove 312;

[0045] The water flowing through the water flow trough 32 can impact the first water guide blade 311, thereby causing the water guide plate 31 to rotate. Then, the second water guide blades 331 abut against the inner walls of the adjacent interlocking grooves 312, and the linkage plate 33 will rotate in conjunction with each other. In this way, when the pressure measuring plate 342 is subjected to the rated water pressure, the water guide plate 31 and the linkage plate 33 will not be easily separated, thereby ensuring the reasonable use of the equipment.

[0046] like Figure 2 to Figure 5 As shown, the side of the linkage plate 33 away from the water guide plate 31 is fixedly connected to the positioning sleeve 41, the connecting plate 42 is fixedly connected to the inner wall of the water outlet pipe 13, the positioning sleeve 43 is fixedly connected to the lower side of the connecting plate 42, and the inner ring of the positioning sleeve 41 is threadedly connected to the positioning sleeve 43;

[0047] The pressure relief pipe 44 is fixedly connected to the upper side of the connecting plate 42, and the pressure relief pipe 44 is fixedly connected to the water outlet pipe 13;

[0048] When the amount of water discharged through the water flow groove 32 is greater than the amount of water discharged from the water outlet pipe 13, it indicates that the pressure in the diaphragm pump body 11 is too high and pressure relief is required. Under the action of pressure, the pressure measuring plate 342 will move toward the linkage plate 33, thereby separating the water guide plate 31 and the linkage plate 33. Then, the water flowing in through the gap between the conical surface of the pressure relief column 341 and the water guide plate 31 will impact the linkage plate 33 under the action of pressure, causing the linkage plate 33 to rotate. At this time, the linkage plate 33 is rotating and rising. state, and then when the pressure in the diaphragm pump body 11 has exceeded the rated pressure and is still increasing, the pressure relief valve 34 will continue to move upward, thereby causing the locking sleeve 41 and the locking sleeve 43 to be threadedly connected, and then under the action of the continuously increasing pressure, the locking sleeve 41 and the locking sleeve 43 are completely clamped, and then the flowing water flowing in through the gap between the conical surface of the pressure relief column 341 and the water guide plate 31 is directly discharged from the pressure relief pipe 44, thereby ensuring that the diaphragm pump body 11 will not be damaged due to excessive water pressure, thereby increasing the service life of the equipment.

[0049] like Figure 2 to Figure 5 As shown, a plurality of latching slots 45 are provided on the latching sleeve 41;

[0050] When the locking sleeve 41 and the locking sleeve 43 are threadedly connected, and then under the continuous rotation of the locking sleeve 41, the channel for the water in the locking sleeve 41 to flow to the outside of the locking sleeve 41 through the locking groove 45 will gradually become smaller until the water that needs to be depressurized can be discharged through the pressure relief pipe 44.

[0051] like Figure 2 and Figure 6 As shown, the driving assembly includes a driving sleeve 51, the driving sleeve 51 is fixedly connected to the input shaft of the micro motor 12, the linkage sleeve 52 abuts against the upper side of the driving sleeve 51, the reset column 53 is threadedly connected in the driving sleeve 51, and one end of the reset column 53 away from the driving sleeve 51 is slidably connected to the linkage sleeve 52, and the reset spring 54 is arranged in the linkage sleeve 52, and the two ends of the reset spring 54 abut against the inner wall of the linkage sleeve 52 and the reset column 53 respectively;

[0052] A plurality of pressurizing pistons 55 are slidably connected to the upper side of the linkage sleeve 52, and each pressurizing piston 55 is slidably connected to the inner wall of the second pump body 22;

[0053] The micro motor 12 drives the driving sleeve 51 to rotate, and then the linkage sleeve 52 abutting against the driving sleeve 51 will move upward with the rotation of the driving sleeve 51, and then the spring force of the reset spring 54 acts on the reset column 53, so that the relatively rotating driving sleeve 51 and the linkage sleeve 52 can be tightly abutted, and then the linkage sleeve 52 can move up and down under the rotation of the driving sleeve 51, thereby carrying a number of pressurizing pistons 55 to pressurize the inner wall of the second pump body 22. When the pressurizing piston 55 moves downward, the water on the outside of the diaphragm pump body 11 can flow into the upper side of the pressurizing piston 55 through the water inlet 15 by pressure, and then the pressurizing piston 55 moves upward. There is a stop valve 17, and the water cannot flow back from the water inlet 15, but flows out from the water outlet pipe 13 through the return water hole 16.

[0054] like Figure 2 As shown, a plurality of screws 18 are rotatably connected to the second pump body 22, the third pump body 23 and the fourth pump body 24, and the lower end of each screw 18 is threadedly connected to the first pump body 21. By screwing the screws 18, the first pump body 21, the second pump body 22, the third pump body 23 and the fourth pump body 24 can be tightly connected together.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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 micro diaphragm pump, comprising a diaphragm pump body (11) and a micro motor (12), wherein the upper side of the diaphragm pump body (11) is fixedly connected with a water outlet pipe (13) and a water inlet pipe (14), the diaphragm pump body (11) is provided with a plurality of water inlet holes (15) and a plurality of water return holes (16), and each of the adjacent water inlet holes (15) is connected to a non-passing valve (17), characterized in that ； The diaphragm pump body (11) comprises a first pump body (21), the upper side of which is sequentially connected with a second pump body (22), a third pump body (23) and a fourth pump body (24), and a check pressure relief assembly is connected between the water outlet pipe (13) and the water inlet pipe (14), and the check pressure relief assembly is used to prevent backflow and has a pressure relief function; A driving component is connected between the first pump body (21) and the second pump body (22) and cooperates with the micro motor (12) to output water from the water outlet pipe (13); The micro motor (12) is fixedly connected to the lower end of the diaphragm pump body (11).

2. The micro diaphragm pump according to claim 1, characterized in that: The non-return pressure relief assembly comprises a water guide plate (31), the water guide plate (31) is rotatably connected to the inner wall of the fourth pump body (24), the water guide plate (31) is provided with a plurality of water flow grooves (32), a linkage plate (33) is clamped on the upper side of the water guide plate (31), a pressure relief valve (34) is fixedly connected to the lower side of the linkage plate (33), and a plurality of pressure relief grooves (35) are provided on the linkage plate (33); A non-return sleeve (36) is rotatably connected to the upper side of the water guide plate (31), and a non-return ring (37) is fixedly connected to the outer ring of the non-return sleeve (36).

3. The micro diaphragm pump according to claim 2, characterized in that: The pressure relief valve (34) comprises a pressure relief column (341). The pressure relief column (341) has a frustum shape that gradually shrinks in a direction away from the linkage disk (33). The lower end of the pressure relief column (341) is fixedly connected to a pressure measuring disk (342).

4. The micro diaphragm pump according to claim 2, characterized in that: A plurality of first water guide blades (311) are fixedly connected to the lower side of the water guide plate (31), a plurality of engaging grooves (312) are provided on the upper side of the water guide plate (31), a plurality of second water guide blades (331) are fixedly connected to the lower side of the linkage plate (33), and each of the second water guide blades (331) abuts against the inner wall of each adjacent engaging groove (312).

5. The micro diaphragm pump according to claim 2, characterized in that: A locking sleeve (41) is fixedly connected to the side of the linkage disk (33) away from the water guide disk (31); a connecting plate (42) is fixedly connected to the inner wall of the water outlet pipe (13); a locking sleeve (43) is fixedly connected to the lower side of the connecting plate (42); and the inner ring of the locking sleeve (41) is threadedly connected to the locking sleeve (43); A pressure relief pipe (44) is fixedly connected to the upper side of the connecting plate (42), and the pressure relief pipe (44) is fixedly connected to the water outlet pipe (13).

6. The micro diaphragm pump according to claim 5, characterized in that: The locking sleeve (41) is provided with a plurality of locking grooves (45).

7. The micro diaphragm pump according to claim 1, characterized in that: The driving assembly comprises a driving sleeve (51), the driving sleeve (51) is fixedly connected to the input shaft of the micro motor (12), the upper side of the driving sleeve (51) is abutted against a linkage sleeve (52), the driving sleeve (51) is internally threadedly connected to a reset column (53), one end of the reset column (53) away from the driving sleeve (51) is slidably connected to the linkage sleeve (52), a reset spring (54) is arranged in the linkage sleeve (52), and the two ends of the reset spring (54) are respectively abutted against the inner wall of the linkage sleeve (52) and the reset column (53); A plurality of pressurizing pistons (55) are slidably connected to the upper side of the linkage sleeve (52), and each of the pressurizing pistons (55) is slidably connected to the inner wall of the second pump body (22).

8. The micro diaphragm pump according to claim 1, characterized in that: The second pump body (22), the third pump body (23) and the fourth pump body (24) are all rotatably connected with a plurality of screws (18), and the lower end of each of the screws (18) is threadedly connected to the first pump body (21).

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