CN114320844A

CN114320844A - Diaphragm pump with adjustable flow control

Info

Publication number: CN114320844A
Application number: CN202111463734.XA
Authority: CN
Inventors: 刘光跃; 王天龙; 高立
Original assignee: NINGBO JLT ELECTRIC CO Ltd
Current assignee: NINGBO JLT ELECTRIC CO Ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-04-12

Abstract

The invention discloses a flow-controlled adjustable diaphragm pump, which comprises: a housing; the pump body is arranged on the side wall of the shell, a pump chamber, two first through holes and two second through holes which are respectively communicated with the pump chamber are arranged in the pump body, and at least three positioning grooves are formed in the pump body; the eccentric wheel and the connecting rod are movably arranged in the shell, and the connecting rod is arranged on the eccentric wheel; the driving mechanism is arranged at one end of the shell and used for driving the eccentric wheel to rotate periodically, and the connecting rod is driven by the eccentric wheel to do reciprocating motion; the first flexible component is arranged between the shell and the pump body, the first flexible component is driven by the connecting rod to reciprocate, and the first flexible component is used for being respectively matched with the two first through openings in a sealing manner; and the second flexible part is arranged in the pump chamber and is respectively matched with the two first ports or the two second ports in a sealing manner. The invention is convenient to disassemble and assemble, has good sealing performance and prolongs the service life.

Description

Diaphragm pump with adjustable flow control

Technical Field

The invention relates to the technical field of pumps, in particular to an adjustable diaphragm pump with flow control.

Background

The diaphragm type miniature water pump is characterized by that it uses motor to provide circular motion, and utilizes a mechanical device to make the diaphragm (diaphragm form is lots) in the interior of water pump implement reciprocating motion so as to compress and stretch the air in the pump cavity, under the action of one-way valve plate a pressure difference is produced between water outlet or water inlet and external atmospheric pressure, and under the action of pressure difference the water is pressed into water inlet, and then discharged from water outlet. The miniature water pump is well applied to occasions such as small household appliances, medical appliances and the like, but the conventional miniature water pump is difficult to realize flow regulation and accurate control.

Diaphragm pump dismouting in the prior art is inconvenient, and the leakproofness of the inside sealed diaphragm of the pump body is relatively poor to lead to the life of diaphragm pump to be shorter.

Disclosure of Invention

Aiming at the problems of the existing diaphragm pump, the adjustable diaphragm pump with the flow control function is convenient to disassemble and assemble, good in sealing performance and long in service life.

The specific technical scheme is as follows:

a flow controlled adjustable diaphragm pump comprising:

a housing;

the pump body is arranged on the side wall of the shell, a pump chamber and two first through holes and two second through holes which are respectively communicated with the pump chamber are arranged in the pump body, and the pump body is positioned in the pump chamber and is provided with at least three positioning grooves;

the eccentric wheel and the connecting rod are movably arranged in the shell, and the connecting rod is arranged on the eccentric wheel;

the driving mechanism is arranged at one end of the shell and used for driving the eccentric wheel to rotate periodically, and the connecting rod is driven by the eccentric wheel to do reciprocating motion;

the first flexible component is arranged between the shell and the pump body, is driven by the connecting rod to reciprocate and is used for being respectively matched with the two first through holes in a sealing manner;

the second flexible component is arranged in the pump chamber, at least three positioning columns are arranged on the peripheral sides of the second flexible component and are respectively matched with the three positioning grooves in a positioning mode, and the second flexible component is respectively matched with the two first ports or the two second ports in a sealing mode.

In the flow-controlled adjustable diaphragm pump, the driving mechanism is a motor, the motor is arranged at one end of the casing, and a driving shaft of the motor extends into the casing and is in transmission connection with the eccentric wheel.

The flow-controlled adjustable diaphragm pump described above, wherein said pump body comprises: pump seat and pump head, the casing the pump seat with the pump head is fixed connection in proper order, the pump seat with form between the pump head the pump chamber, two has in the pump seat first opening, two has in the pump head the second opening, first flexible component centre gripping in the casing with between the pump seat, the second flexible component centre gripping in the pump seat with between the pump head.

In the flow-controlled adjustable diaphragm pump, one side of the pump seat is provided with a first groove, one ends of the two first ports are respectively communicated with the first groove, one side of the first flexible component, which is away from the connecting rod, is provided with a second groove, the central axis of the second groove is respectively parallel to the central axes of the two first ports, a first distance is formed between the central axis of the first port and the central axis of the second groove, a second distance is formed between the central axis of the other first port and the central axis of the second groove, the first distance is greater than the radius of the second groove, and the second distance is smaller than the radius of the second groove.

In the flow-control adjustable diaphragm pump, the other side of the pump base is provided with two third grooves and at least three positioning grooves, and the other ends of the two first ports are respectively communicated with the two third grooves.

In the flow-control adjustable diaphragm pump, one side of the pump head is provided with two fourth grooves and a flange, the two fourth grooves are respectively opposite to the two third grooves, one ends of the two second ports are respectively communicated with the two fourth grooves, one side of the second flexible part is positioned by the positioning columns, and the other side of the second flexible part is positioned by the flange.

The flow control adjustable diaphragm pump described above, wherein said second flexible member comprises: the membrane comprises a membrane body and two membranes, wherein two sides of each membrane are respectively connected with the membrane body through two connecting strips, a first hollow groove is formed between the other two sides of each membrane and the membrane body, and a second hollow groove is formed in the outer side of each membrane body, which is positioned at two connecting strips.

In the flow-controlled adjustable diaphragm pump, the two first hollow-out grooves and the two second hollow-out grooves are both arc-shaped.

In the flow-control adjustable diaphragm pump, the eccentric wheel is an eccentric blade, a photoelectric sensor is arranged on the side wall of the shell, and the photoelectric sensor is used for matching with the eccentric wheel to record the number of rotations of the eccentric wheel.

The diaphragm pump with adjustable foretell flow control, wherein, have installation cavity and two third ports in the pump head, one the third port passes through the installation cavity is linked together with one the second port, another the third port with another the second port is linked together, the installation cavity through link up the groove with another the third port is linked together, be equipped with the bypass valve in the installation cavity, the bypass valve with link up the groove shutoff cooperation, the bypass valve includes: the pump head is arranged at the outer end of the installation cavity and fixedly connected with the pump head, the valve block is matched with the through groove in a plugging mode, and the spring is abutted between the valve block and the valve core.

Compared with the prior art, the technical scheme has the positive effects that:

the pump body is detachably arranged, so that the pump body is convenient to install, the positioning columns are arranged on the peripheral sides of the second flexible parts, so that the pump body is convenient to position, the second flexible parts can be prevented from moving, the flow stability is improved, and the service life of the diaphragm pump is prolonged.

Drawings

FIG. 1 is a schematic view of an overall structure of a flow-controlled adjustable diaphragm pump according to the present invention;

FIG. 2 is an elevational view of the overall construction of a flow control adjustable diaphragm pump of the present invention;

FIG. 3 is a side view of the overall construction of a flow control adjustable diaphragm pump of the present invention;

FIG. 4 is a top view of the overall structure of a flow control adjustable diaphragm pump according to the present invention;

FIG. 5 is a longitudinal sectional view showing the overall construction of a flow control adjustable diaphragm pump according to the present invention;

FIG. 6 is a longitudinal sectional view showing the overall construction of a flow control adjustable diaphragm pump according to the present invention;

FIG. 7 is a transverse cross-sectional view of the overall construction of a flow controlled adjustable diaphragm pump of the present invention;

FIG. 8 is an enlarged view at A of FIG. 7 of a flow control adjustable diaphragm pump of the present invention;

FIG. 9 is an exploded view of an adjustable diaphragm pump for flow control according to the present invention;

FIG. 10 is a schematic view of a housing of an adjustable flow controlled diaphragm pump according to the present invention;

FIG. 11 is a schematic view of a connecting rod of an adjustable diaphragm pump for flow control according to the present invention;

FIG. 12 is a schematic view of a first flexible member of an adjustable flow controlled diaphragm pump according to the present invention;

FIG. 13 is a cross-sectional view of the first flexible member of an adjustable flow controlled diaphragm pump in accordance with the present invention;

FIG. 14 is a schematic diagram of a pump seat of an adjustable diaphragm pump for flow control according to the present invention;

FIG. 15 is a schematic diagram of a pump seat of an adjustable diaphragm pump for flow control according to the present invention;

FIG. 16 is a schematic view of a second flexible member of an adjustable flow controlled diaphragm pump according to the present invention;

FIG. 17 is a schematic view of a pump head of an adjustable flow control diaphragm pump according to the present invention;

in the drawings: 1. a housing; 2. a pump body; 3. an eccentric wheel; 4. a connecting rod; 5. a drive mechanism; 6. a first flexible member; 7. a second flexible member; 8. a pump chamber; 9. a first port; 10. a second port; 11. positioning a groove; 12. a positioning column; 13. an upper shell; 14. a lower case; 15. a screw; 16. a pump mount; 17. a pump head; 18. a screw; 19. a photoelectric detector; 21. a first groove; 22. a second groove; 23. a third groove; 24. a fourth groove; 25. a ring groove; 26. a card slot; 27. a concave cavity; 28. an annular gap; 31. a first convex ring; 32. a second convex ring; 33. a third convex ring; 34. a fourth convex ring; 35. a fifth bulge loop; 36. a flange; 37. a convex column; 38. a first bump; 39. a second bump; 41. a membrane body; 42. a membrane; 43. a connecting strip; 44. a first hollow-out groove; 45. a second hollow-out groove; 51. a mounting cavity; 52. a third port; 53. a through groove; 54. a bypass valve; 55. a valve block; 56. a spring; 57. a valve core; 58. a fixed block; 61. a first bearing; 62. a second bearing; 63. a stud; 64. a communication port; 65. a movable end; 66. a driving end; 67. mounting grooves; 68. a fastening space; 69. a nut; 70. mounting the main body; 71. a fastening ring; 72. forming a groove; 73. forming a ring; 74. and (5) reinforcing ribs.

Detailed Description

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

Fig. 1 is a schematic view illustrating an overall structure of a flow control adjustable diaphragm pump according to the present invention, fig. 2 is a front view illustrating the overall structure of the flow control adjustable diaphragm pump according to the present invention, fig. 3 is a side view illustrating the overall structure of the flow control adjustable diaphragm pump according to the present invention, fig. 4 is a top view illustrating the overall structure of the flow control adjustable diaphragm pump according to the present invention, fig. 5 is a longitudinal sectional view illustrating the overall structure of the flow control adjustable diaphragm pump according to the present invention, fig. 6 is a longitudinal sectional view illustrating the overall structure of the flow control adjustable diaphragm pump according to the present invention, fig. 7 is a transverse sectional view illustrating the overall structure of the flow control adjustable diaphragm pump according to the present invention, fig. 8 is an enlarged view taken at a point a in fig. 7 of the flow control adjustable diaphragm pump according to the present invention, and fig. 9 is an exploded structural view illustrating the flow control adjustable diaphragm pump according to the present invention, fig. 10 is a schematic structural view of a housing of a flow control adjustable diaphragm pump according to the present invention, fig. 11 is a schematic structural view of a connecting rod of the flow control adjustable diaphragm pump according to the present invention, fig. 12 is a schematic structural view of a first flexible member of the flow control adjustable diaphragm pump according to the present invention, fig. 13 is a sectional structural view of the first flexible member of the flow control adjustable diaphragm pump according to the present invention, fig. 14 is a schematic structural view of a pump seat of the flow control adjustable diaphragm pump according to the present invention, fig. 15 is a schematic structural view of the pump seat of the flow control adjustable diaphragm pump according to the present invention, fig. 16 is a schematic structural view of a second flexible member of the flow control adjustable diaphragm pump according to the present invention, fig. 17 is a schematic structural view of a pump head of the flow control adjustable diaphragm pump according to the present invention, and as shown in fig. 1 to 17, a flow control adjustable diaphragm pump according to a preferred embodiment is illustrated, the method comprises the following steps: the pump comprises a shell 1, a pump body 2, an eccentric wheel 3, a connecting rod 4, a driving mechanism 5, a first flexible part 6 and a second flexible part 7, wherein the pump body 2 is arranged on the side wall of the shell 1, the pump body 2 is internally provided with a pump chamber 8 and two first through holes 9 and two second through holes 10 which are respectively communicated with the pump chamber 8, the pump body 2 is positioned in the pump chamber 8 and is provided with at least three positioning grooves 11, the eccentric wheel 3 and the connecting rod 4 are movably arranged in the shell 1, the connecting rod 4 is arranged on the eccentric wheel 3, the driving mechanism 5 is arranged at one end of the shell 1 and is used for driving the eccentric wheel 3 to periodically rotate, the connecting rod 4 is driven by the eccentric wheel 3 to do reciprocating motion, the first flexible part 6 is arranged between the shell 1 and the pump body 2, the first flexible part 6 is driven by the connecting rod 4 to do reciprocating motion, the first flexible part 6 is respectively matched with the two first through holes 9 in a sealing way, the second flexible part 7 is arranged in the pump chamber 8, the periphery of the second flexible component 7 is provided with at least three positioning columns 12, the three positioning columns 12 are respectively matched with the three positioning grooves 11 in a positioning way, and the second flexible component 7 is respectively matched with the two first through holes 9 or the two second through holes 10 in a blocking way.

Preferably, the eccentric 3 is a three-blade eccentric.

Preferably, the connecting rod 4 is sleeved on the eccentric wheel 3.

Preferably, a first bearing 61 is arranged between the connecting rod 4 and the eccentric 3.

Further, as a preferred embodiment, the driving mechanism 5 is a motor, the motor is disposed at one end of the housing 1, and a driving shaft of the motor extends into the housing 1 and is in transmission connection with the eccentric wheel 3.

Preferably, a second bearing 62 is provided between the drive shaft of the motor and the housing 1.

Preferably, the first bearing 61 is a deep groove ball bearing and the second bearing 62 is an oil-retaining bearing.

Preferably, the casing 1 comprises: the upper casing 13 and the lower casing 14, the four corners of the upper casing 13 and the lower casing 14 are respectively fixedly connected through screws 15.

Preferably, the second bearing 62 is located between the upper housing 13 and the drive shaft of the motor.

Further, as a preferred embodiment, the pump body 2 includes: pump seat 16 and pump head 17, casing 1, pump seat 16 and pump head 17 are fixed connection in proper order, form pump chamber 8 between pump seat 16 and the pump head 17, have two first ports 9 in the pump seat 8, have two second ports 10 in the pump head 17, and first flexible component 6 centre gripping is between casing 1 and pump seat 16, and second flexible component 7 centre gripping is between pump seat 16 and pump head 17.

Preferably, the four corners of the pump head 17 are provided with screws 15, and each screw 15 penetrates through the pump head 17 and the pump base 16 in sequence and is fixedly connected with the housing 1.

Preferably, studs 63 are arranged at four corners of the side wall of the housing 1, communication ports 64 are arranged at four corners of the pump base 16, the studs 63 extend into or penetrate through the communication ports 64, the screws 15 extend into or penetrate through the pump head 17, and the screws 15 are in threaded connection with the studs 63.

Preferably, the upper and

lower housings

13, 14 are mounted in a first orientation, and the housing 1, pump mount 16 and pump head 17 are mounted in a second orientation, the first orientation being perpendicular to the second orientation.

The detachable structure of the shell 1 and the detachable structure of the pump body 2 realize the convenient disassembly and assembly of the diaphragm pump.

Preferably, the connecting rod 4 comprises a movable end 65 and a driving end 66 which are connected with each other, the movable end 65 is cylindrical, the movable end 65 is provided with a mounting groove 67, the first bearing 61 is arranged in the mounting groove 67, the driving end 66 is arranged on the periphery of the movable end 65, the central axis of the driving end 66 is perpendicular to the central axis of the movable end 65, and a fastening space 68 is arranged in the driving end 66.

Preferably, at least two ribs 74 are provided on the side walls of the movable end 65 and the drive end 66.

The above are merely preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.

The present invention also has the following embodiments in addition to the above:

in a further embodiment of the present invention, please refer to fig. 1 to 17, one side of the pump seat 16 has a first groove 21, one end of each of the two first through holes 9 is communicated with the first groove 21, one side of the first flexible member 6 away from the connecting rod 4 has a second groove 22, a central axis of the second groove 22 is parallel to a central axis of each of the two first through holes 9, a first distance is formed between the central axis of one of the first through holes 9 and the central axis of the second groove 22, a second distance is formed between the central axis of the other one of the first through holes 9 and the central axis of the second groove 22, the first distance is greater than a radius of the second groove 22, and the second distance is smaller than a radius of the second groove 22.

Preferably, a nut 69 and a screw 18 are provided in the fastening space 68, the nut 69 including: the mounting body 70 and the fastening rings 71 are arranged on the peripheries of the two ends of the mounting body 70, the mounting body 70 and the two fastening rings 71 are of an integrated structure, the periphery of the fastening ring 71 is provided with threads, the fastening ring 71 is fixedly connected with the peripheral wall of the fastening space 68, and the nut 69 is more firmly connected with the connecting rod 4.

Preferably, the connecting rod 4 is a plastic member, and the nut 69 is directly and integrally formed with the connecting rod 4.

Preferably, the first flexible member 6 is a rubber flap.

Preferably, the screw 18 is directly integral with the first flexible member 6.

Preferably, the mounting body 70 is provided with threads, and the screw 18 is connected with the mounting body 70 through the threads, so that the screw 18 is connected with the nut 69 more stably.

Preferably, one end of the first flexible component 6 is provided with a forming groove 72, one end of the first flexible component 6 is provided with a forming ring 73 at the end part of the forming groove 72, the end part of the screw 18 penetrates through the forming ring 73 and extends into the forming groove 72, the end part of the screw 18 is in limit fit with the forming ring 73, and the end part of the screw 18 is directly formed with one end of the first flexible component 6.

Preferably, the side wall of the housing 2 is provided with an annular groove 25, the periphery of the other end of the first flexible component 6 is provided with a third protruding ring 33, the third protruding ring 33 faces one end of the first flexible component 6, the other end of the first flexible component 6 is provided with an annular notch 28, the annular notch 28 is located on one end surface of the first flexible component 6 away from the eccentric wheel 3, the annular notch 28 is opposite to the third protruding ring 33, the third protruding ring 33 is clamped in the annular groove 25, one side of the pump seat 16 is provided with two first protruding rings 31 and a second protruding ring 32 which are concentrically arranged, the thickness of the second protruding ring 32 is larger than that of the first protruding ring 31, the second protruding ring 32 is opposite to the annular groove 25, the second protruding ring 32 is used for positioning the periphery of the first flexible component 6, and the first protruding ring 31 is used for sealing the space formed between the first groove 21 and the second groove 22.

Preferably, the two first collars 31 seal the first flexible member 6 against the side wall of the housing 2.

Preferably, the two first convex rings 31, the second convex ring 32, the third convex ring 33 and the annular groove 25 are matched to realize sealing.

Preferably, the bottom of the first groove 21 is arc-shaped.

In a further embodiment of the present invention, the other side of the pump base 16 has two third grooves 23 and at least three positioning grooves 11, and the other ends of the two first through holes 9 are respectively communicated with the two third grooves 23.

In a further embodiment of the present invention, one side of the pump head 17 has two fourth grooves 24 and a flange 36, the two fourth grooves 24 are respectively opposite to the two third grooves 23, one end of the two second openings 10 is respectively communicated with the two fourth grooves 24, one side of the second flexible component 7 is located by the plurality of positioning posts 12, and the other side of the second flexible component 7 is located by the flange 36.

Preferably, one third groove 23 is cylindrical, the other third groove 23 has a fourth protruding ring 34 therein, the other third groove 23 is circular, and the fourth protruding ring 34 is located on the periphery of the other end of the other first through hole 9.

Preferably, a fourth groove 24 has a fifth protruding ring 35 therein, the fourth groove 24 is disposed in a circular ring shape, the other fourth groove 24 is disposed in a cylindrical shape, and the fifth protruding ring 35 is located on the periphery of one end of the second opening 10.

Preferably, the other side of the pump body 16 has a cavity 27, the second flexible member 7 is disposed in the cavity 27, the periphery of the bottom of the cavity 27 has a plurality of positioning slots 11, the periphery of one side of the second flexible member 7 has a plurality of positioning posts 12, and the other side of the second flexible member 7 is flush with the other side of the pump base 16.

Preferably, the flange 36 is disposed in an "8" shape.

Preferably, the flange 36 abuts against the peripheral side and the middle of the other side surface of the second flexible member 7.

Preferably, one side of the pump head 17 is provided with a convex column 37, the other side of the pump body 16 is provided with a clamping groove 26, and the convex column 37 is in clamping fit with the clamping groove 26.

In a further embodiment of the invention, the second flexible member 7 comprises: the membrane comprises a membrane body 41 and two membranes 42, wherein two sides of each membrane 42 are respectively connected with the membrane body 41 through two connecting strips 43, a first hollow-out groove 44 is respectively arranged between the other two sides of each membrane 42 and the membrane body 41, and the membrane body 41 is provided with a second hollow-out groove 45 at the outer side of the two connecting strips 43.

Preferably, one diaphragm 42 is in sealing engagement with fifth collar 35 and the other diaphragm 42 is in sealing engagement with fourth collar 34.

Preferably, the diaphragm 42 is disposed in a circular shape, the central axis of the first through hole 9 is disposed in parallel with the central axis of the second through hole 10, a third distance is formed between the central axis of the first through hole 9 and the central axis of the second through hole 10, the central axis of the other first through hole 9 is disposed in parallel with the central axis of the other second through hole 10, the central axis of the other first through hole 9 and the central axis of the other second through hole 10 form a fourth distance, the radius of the one diaphragm 42 is smaller than the third distance, and the radius of the other diaphragm 42 is smaller than the fourth distance.

Preferably, the end of the positioning column 11, the end of the first convex ring 31, the end of the fourth convex ring 34, the end of the fifth convex ring 35, and the end of the flange 36 are all arranged in a circular arc shape or chamfered.

In a further embodiment of the present invention, the first hollow-out grooves 44 and the second hollow-out grooves 45 are both circular arc-shaped.

Preferably, as shown in fig. 7 and 8, the first through hole 9, the second through hole 10, the diaphragm 42, the third groove 23, the fourth groove 24, the first hollow grooves 44 and the second hollow grooves 45 are all located at the lower side of the pump body 2, and the other first through hole 9, the other second through hole 10, the other diaphragm 42, the other third groove 23, the other fourth groove 24, the other first hollow grooves 44 and the other second hollow grooves 45 are located at the upper side of the pump body 2.

Preferably, the other end of the first port 9 faces the fourth groove 24, and the other end of the third port 52 faces the third groove 23.

Preferably, the inner walls of the two first hollow-out grooves 44 are on the same first circle, the outer walls of the two first hollow-out grooves 44 are on the same second circle, the inner walls of the two second hollow-out grooves 45 are on the same third circle, and the outer walls of the two second hollow-out grooves 45 are on the same fourth circle; the inner walls of the other two first hollow-out grooves 44 are located on the same fifth circle, the outer walls of the other two first hollow-out grooves 44 are located on the same sixth circle, the inner walls of the other two second hollow-out grooves 45 are located on the same seventh circle, and the outer walls of the other two second hollow-out grooves 45 are located on the same eighth circle.

Preferably, the radius of one diaphragm 42 is greater than the radius of the fifth torus 35, and the radius of the other diaphragm 42 is greater than the radius of the fourth torus 34.

Preferably, the middle portion of the third groove 23 has a first protrusion 38, the first protrusion 38 is disposed in a cylindrical shape, the first protrusion 38 corresponds to the diaphragm 42, the central axis of the first protrusion 38 is disposed coaxially with the central axis of the second opening 10, the central axis of the first protrusion 38 is disposed coaxially with the central axis of the third groove 23, the radius of the first protrusion 38 is smaller than the radius of the second opening 10, and the radius of the second opening 10 is smaller than the radius of the diaphragm 42.

Preferably, the second protrusion 39 is disposed in the middle of the fourth groove 24, the second protrusion 39 is disposed in a cylindrical shape, the second protrusion 39 corresponds to the second diaphragm 42, the central axis of the second protrusion 39 is disposed coaxially with the central axis of the first through hole 9, the radius of the second protrusion 39 is smaller than the radius of the first through hole 9, and the radius of the first through hole 9 is equal to the radius of the second through hole 10.

Preferably, the second flexible member 7 has a good sealing effect.

In a further embodiment of the present invention, the eccentric wheel 3 is an eccentric blade, the eccentric blade has three blades, the sidewall of the housing 1 is provided with a photoelectric sensor 19, and the photoelectric sensor 19 is used for cooperating with the eccentric wheel 3 to record the number of rotations of the eccentric wheel 3.

In a further embodiment of the present invention, the pump head 17 has a mounting cavity 51 and two third through holes 52 therein, one third through hole 52 is communicated with one second through hole 10 through the mounting cavity 51, the other third through hole 52 is communicated with the other second through hole 10, the mounting cavity 51 is communicated with the other third through hole 52 through a through groove 53, a bypass valve 54 is disposed in the mounting cavity 51, the bypass valve 54 is in sealing fit with the through groove 53, the bypass valve 54 includes: the pump head comprises a valve block 55, a spring 56 and a valve core 57, wherein one end of the valve core 57 is fixedly connected with the outer end, located in the mounting cavity 51, of the pump head 17, the valve block 55 is in sealing fit with the through groove 53, and the spring 56 is abutted between the valve core 57 and the valve block 55.

Preferably, the bypass valve 54 further comprises: and the fixed block 58 is arranged at the outer end in the mounting cavity 51, and the other end of the valve core 57 is fixedly connected with the fixed block 58 in a threaded manner.

Preferably, the inner end of the mounting cavity 51 is arranged in a conical shape, the end of the valve block 55 is arranged in a circular truncated cone shape, and the end of the valve block 55 is in plugging fit with the inner end of the mounting cavity 51, so that the plugging effect is good.

The pump body 16 of the invention is arranged in a detachable way, so that the installation is convenient, the positioning columns 12 are arranged on the peripheral sides of the second flexible parts 7, the positioning is convenient, the second flexible parts 7 can be prevented from moving, the flow precision is increased, and the service life of the diaphragm pump is prolonged.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims

1. A flow controlled adjustable diaphragm pump comprising:

a housing;

2. The adjustable diaphragm pump according to claim 1, wherein the driving mechanism is a motor, the motor is disposed at one end of the housing, and a driving shaft of the motor extends into the housing and is in transmission connection with the eccentric wheel.

3. The adjustable diaphragm pump of claim 1 wherein the pump body comprises: pump seat and pump head, the casing the pump seat with the pump head is fixed connection in proper order, the pump seat with form between the pump head the pump chamber, two has in the pump seat first opening, two has in the pump head the second opening, first flexible component centre gripping in the casing with between the pump seat, the second flexible component centre gripping in the pump seat with between the pump head.

4. The adjustable diaphragm pump of claim 3 wherein one side of the pump base has a first groove, one end of each of the first ports is connected to the first groove, the other side of the first flexible member away from the connecting rod has a second groove, the central axis of the second groove is parallel to the central axis of each of the first ports, the central axis of one of the first ports and the central axis of the second groove form a first distance, the central axis of the other of the first ports and the central axis of the second groove form a second distance, the first distance is greater than the radius of the second groove, and the second distance is smaller than the radius of the second groove.

5. The adjustable diaphragm pump according to claim 4, wherein the other side of the pump seat has two third grooves and at least three positioning grooves, and the other ends of the two first ports are respectively connected to the two third grooves.

6. The adjustable diaphragm pump according to claim 5, wherein one side of said pump head has two fourth grooves and a flange, said two fourth grooves are respectively opposite to said two third grooves, one end of said two second ports is respectively connected to said two fourth grooves, one side of said second flexible member is positioned by said positioning posts, and the other side of said second flexible member is positioned by said flange.

7. The adjustable diaphragm pump of claim 6 wherein the second flexible member comprises: the membrane comprises a membrane body and two membranes, wherein two sides of each membrane are respectively connected with the membrane body through two connecting strips, a first hollow groove is formed between the other two sides of each membrane and the membrane body, and a second hollow groove is formed in the outer side of each membrane body, which is positioned at two connecting strips.

8. The adjustable diaphragm pump of claim 7 wherein both of the first hollow-out grooves and both of the second hollow-out grooves are configured in a circular arc shape.

9. The adjustable diaphragm pump according to claim 1, wherein the eccentric wheel is an eccentric impeller, and the sidewall of the housing is provided with a photoelectric sensor for recording the number of revolutions of the eccentric wheel in cooperation with the eccentric wheel.

10. The adjustable diaphragm pump according to claim 8, wherein the pump head has a mounting cavity and two third ports, one of the third ports is connected to one of the second ports through the mounting cavity, the other of the third ports is connected to the other of the second ports, the mounting cavity is connected to the other of the third ports through a through slot, a bypass valve is disposed in the mounting cavity, the bypass valve is in sealing engagement with the through slot, and the bypass valve comprises: the pump head is arranged at the outer end of the installation cavity and fixedly connected with the pump head, the valve block is matched with the through groove in a plugging mode, and the spring is abutted between the valve block and the valve core.