CN111255668A

CN111255668A - Diaphragm pump

Info

Publication number: CN111255668A
Application number: CN202010210705.1A
Authority: CN
Inventors: 吴潭; 梁鹏程
Original assignee: Zhejiang Duojia Electromechanical Technology Co Ltd
Current assignee: Zhejiang Duojia Electromechanical Technology Co Ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-06-09

Abstract

Diaphragm pump, including the pump body and with pump body coupling's drive assembly, the pump body is connected with drive assembly's pivot, the pump body includes from last to lower fixed mounting's business turn over water cover in proper order, one-way disk seat and main diaphragm seat, business turn over water is covered and is provided with water inlet and delivery port, one-way disk seat is provided with out the water diaphragm towards business turn over water cover one side, it is provided with a plurality of check valve diaphragms to deviate from business turn over water cover one side, nested integrated into one piece's main diaphragm of installing on the main diaphragm seat, drive assembly includes the 370 motor, the eccentric wheel, be fixed in the motor base on the 370 motor and be fixed in the support. Compared with the prior art, the diaphragm pump can be used in a water environment for a long time, can keep stronger strength and rigidity at higher temperature, and has excellent wear-resisting property and self-lubricating property. The pump body is simple in structure, the types and the working voltages of the motors with more stable performance are selected, and the overall use performance of the diaphragm pump is guaranteed.

Description

Diaphragm pump

Technical Field

The invention relates to the technical field of pump bodies, in particular to a diaphragm pump.

Background

The diaphragm pump realizes the regulation of fluid in the pump body by arranging the main diaphragm in the pump body, and the principle of the diaphragm pump is that the fluid is sucked and discharged by utilizing the pressure difference between different cavities in the pump body and the outside air. At present, the performance of the diaphragm pump selected by materials for long-term use in a water environment in the prior art is not stable enough, wherein the compression strength of an eccentric wheel for adjusting the internal and external pressure difference is limited, the eccentric wheel can slip due to abrasion caused by long-term compression, the service life of the whole pump body is shortened, and meanwhile, the types and the working voltage performance of the selected motor are not stable and reliable enough, and the service performance of the whole diaphragm pump is influenced.

Disclosure of Invention

The invention aims to solve the technical problem of providing a diaphragm pump with a more reasonable structure aiming at the problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

diaphragm pump, including the pump body and with pump body coupling's drive assembly, the pump body is connected with drive assembly's pivot, the pump body includes from last to lower fixed mounting's business turn over water cover, one-way disk seat and main diaphragm seat in proper order, business turn over water is covered and is provided with water inlet and delivery port, one-way disk seat is provided with out the water diaphragm towards business turn over water cover one side, deviates from business turn over water cover one side and is provided with a plurality of check valve diaphragms, nested integrated into one piece's main diaphragm of installing on the main diaphragm seat, drive assembly includes 370 motor, installs eccentric wheel, the screw thread in 370 motor epaxial motor base on the motor and is fixed in the support on the motor base through the stainless steel axle, drive assembly is used for the drive the support swing, thereby drive main diaphragm up-and-.

Preferably, a rubber pad is arranged between the edges of the water inlet and outlet cover and the one-way valve seat in a matching manner, a plurality of inward arc-shaped openings are uniformly formed in the circumferential direction of the rubber pad, a circular boss is arranged in the middle of one surface, facing the water inlet and outlet cover, of the one-way valve seat, and an O-shaped ring is arranged between the boss and the water inlet and outlet cover.

Preferably, a triangular limiting lug is arranged in the boss, the water outlet membrane is sleeved in the boss, and the water outlet membrane can reciprocate up and down along the axial direction of the boss.

Preferably, the boss of one-way valve seat deviates from one side of the water outlet diaphragm and is provided with a plurality of water outlets around the boss axle center, the water outlet outside corresponds and sets up a plurality of spliced eyes, spliced eye outside circumference sets up a plurality of inlet openings, the one-way valve diaphragm corresponds sealedly to be installed on the spliced eye.

Preferably, the support comprises a plurality of branches, limiting parts are arranged on the branches, the lower end of the main diaphragm penetrates through the main diaphragm seat and then is inserted into the limiting parts, and when the one-way valve seat is connected with the main diaphragm, the one-way valve seat and the main diaphragm are matched to form three independent sealed main diaphragm cavities.

Preferably, the eccentric wheel is arranged on a rotating shaft of the 370 motor, an eccentric hole is formed in the eccentric wheel, one end of the stainless steel shaft is obliquely inserted into the eccentric hole, the other end of the stainless steel shaft is connected with the bracket, and when the driving assembly works, the eccentric wheel rotates to drive the bracket to swing.

Preferably, the water inlet and outlet cover, the one-way valve seat and the main diaphragm seat are fixed through a plurality of self-tapping screws in a threaded manner, and the self-tapping screws are uniformly arranged on the water inlet and outlet cover in the circumferential direction and penetrate through the one-way valve seat to be connected and fixed with the main diaphragm seat.

Preferably, the water inlet and outlet cover, the one-way valve seat, the main diaphragm seat and the motor base are made of PA66 or ABS, the eccentric wheel is made of POK, and the support is made of POM.

Preferably, the main diaphragm is made of rubber material EPDM.

Preferably, the 370 motor is set to have an operating voltage range of 3-24V.

Compared with the prior art, the diaphragm pump has the beneficial effects that: the diaphragm pump can be used in a water environment for a long time, can keep stronger strength and rigidity at higher temperature, and has excellent wear-resisting property and self-lubricating property. The pump body is simple in structure, the types and the working voltages of the motors with more stable performance are selected, and the overall use performance of the diaphragm pump is guaranteed.

Drawings

Fig. 1 is an exploded perspective view of a diaphragm pump according to the present invention.

Fig. 2 is a sectional view (water absorption stage) of the diaphragm pump of the present invention.

Fig. 3 is a cross-sectional view (drainage stage) of the diaphragm pump of the present invention.

Reference numerals: 1. a water inlet and outlet cover; 11. a water inlet; 12. a water outlet; 13. self-tapping screws; 2. a one-way valve seat; 21. a water outlet membrane; 22. a one-way valve diaphragm; 23. a rubber pad; 24. an O-shaped ring; 25. a boss; 3. a main diaphragm seat; 31. a main diaphragm; 311. a main diaphragm cavity; 4. a drive assembly; 41. 370 motor; 411. a rotating shaft; 42. an eccentric wheel; 43. a motor base; 44. a support; 441. a limiting part; 45. a stainless steel shaft; 46. short screws.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 3, the diaphragm pump of this embodiment, including the pump body and the drive assembly 4 with pump body coupling, it is specific, the pump body is connected with the pivot 411 of drive assembly 4, the pump body includes from last to lower business turn over water cover 1 of fixed mounting in proper order, one-way valve seat 2 and main diaphragm seat 3, be provided with water inlet 11(in) and delivery port 12(out) on the business turn over water cover 1, one-way valve seat 2 is provided with out water diaphragm 21 towards business turn over water cover 1 one side, it is provided with a plurality of check valve diaphragms 22 to deviate from business turn over water cover 1 one side, nested main diaphragm 31 of installing integrated into one piece on the main diaphragm seat 3, and the material that main diaphragm 31 adopted is rubber material EPDM.

The driving assembly 4 comprises a 370 motor 41, an eccentric wheel 42 mounted on a rotating shaft 411 of the 370 motor 41, a motor base 43 screwed on the 370 motor 41, and a bracket 44 fixed on the motor base 43 through a stainless steel shaft 45, wherein the driving assembly 4 is used for driving the bracket 44 to swing so as to drive the main diaphragm 31 to reciprocate up and down.

The water inlet and outlet cover 1, the one-way valve seat 2 and the main diaphragm seat 3 are fixed by a plurality of self-tapping screws 13 through threads, and the self-tapping screws 13 are uniformly arranged on the water inlet and outlet cover 1 in the circumferential direction and then penetrate through the one-way valve seat 2 and the main diaphragm seat 3 to be connected and fixed. Specifically, self tapping screw 13 is provided with three, and has all installed the gasket, has guaranteed the holistic leakproofness of pump body.

Wherein, be provided with the rubber pad 23 of adaptation between the border of business turn over water lid 1 and one-way disk seat 2, rubber pad 23 circumference evenly sets up a plurality of inward arc openings, and one side middle part that one-way disk seat 2 faced business turn over water lid 1 is provided with circular shape boss 25, and O type circle 24 has been installed between boss 25 and business turn over water lid 1.

The boss 25 of the one-way valve seat 2 deviates from one side of the water outlet membrane 21 and is provided with a plurality of water outlets (not shown in the figure) around the axis of the boss 25, a plurality of inserting holes (not shown in the figure) are correspondingly arranged on the outer sides of the water outlets, a plurality of water inlets (not shown in the figure) are circumferentially arranged on the outer sides of the inserting holes, and the one-way valve membrane 22 is correspondingly sealed and arranged on the inserting holes. Specifically, the apopore is provided with threely, and the spliced eye corresponds sets up threely. It can thus be seen that the number of check valve diaphragms 22 is likewise provided in three.

In the embodiment, the inward arc-shaped opening is matched with a self-tapping screw 13 for fixing, so that the sealing performance of the water inlet and outlet cover 1 and the one-way valve seat 2 is ensured; the O-shaped ring 24 is arranged for further sealing and limiting the boss 25 and the water inlet and outlet cover 1, so that the sealing of a water outlet cavity formed by the boss 25 provided with a water outlet hole and the water inlet and outlet cover 1 is ensured.

The middle part of the boss 25 is provided with a triangular limiting lug, the water outlet membrane 21 is sleeved in the boss 25 through the limiting lug, and the water outlet membrane 21 can reciprocate up and down along the axial direction of the boss 25. In this embodiment, the water outlet membrane 21 is used to seal the water outlet holes formed in the boss 25, so that only water can be discharged from the chamber corresponding to the water outlet holes and water cannot enter the chamber.

Wherein, support 44 among the drive assembly 4 includes a plurality of branches, and all is provided with spacing portion 441 on the branch, pegs graft on spacing portion 441 behind main diaphragm seat 3 is passed to main diaphragm 31 lower extreme, and when one-way valve seat 2 was connected with main diaphragm 31, one-way valve seat 2 and the cooperation of main diaphragm 31 formed three independent sealed main diaphragm cavity 311 for it is intake. In addition, the motor base 43 is fixedly connected 370 with the motor 41 by providing two short screws 46 with spacers.

In this embodiment, the support 44 is made of POM, and has high mechanical strength and rigidity, can bear high fatigue strength, and has good environmental resistance, organic solvent resistance, and repetitive impact resistance. Specifically, the stent includes three branches. The lower end of the main diaphragm 31 is in the shape of a three-pin needle, and is fixed on the limiting portion 441 in an inserting manner. The eccentric wheel 42 is installed on the rotating shaft 411 of the 370 motor 41, an eccentric hole is formed in the eccentric wheel 42, one end of the stainless steel shaft 45 is obliquely inserted into the eccentric hole, the other end of the stainless steel shaft is connected with the bracket 44, and when the driving component 4 works, the eccentric wheel 42 rotates to drive the bracket 44 to swing.

The working principle of the diaphragm pump is as follows: when a 370 motor 41 in the driving assembly 4 is powered on, the 370 motor 41 drives an eccentric wheel 42 to rotate, the eccentric wheel 42 drives a bracket 44 to rotate through a stainless steel shaft 45, the bracket 44 makes three main diaphragm cavities 311 of the main diaphragm 31 deform in tension through a limiting part 441 of the bracket 44, the volumes of the three main diaphragm cavities 311 are increased, and when the pressure P of the main diaphragm cavity 311 is smaller than the air pressure (Pin) of a water inlet 11, water in the pump body rushes 3 one-way valve diaphragms 22 through the water inlet 11 and through water inlet holes of a one-way valve seat 2 to enter the main diaphragm cavities 311; when water is drained, the motor 41 of 370 drives the eccentric wheel 42 to rotate, the eccentric wheel 42 drives the bracket 44 to rotate through the stainless steel shaft 45, the bracket 44 makes the main diaphragm cavity 311 deform under tension, the cavity volume is reduced, and when the pressure P of the main diaphragm cavity 311 is greater than the air pressure (Pout) of the water outlet 12, water rushes out the water outlet diaphragm 21 through the water outlet hole on the one-way valve seat 2 and flows out of the water outlet 12.

Specifically, in order to keep the diaphragm pump operating stably, the operating voltage of the motor 41 is set 370 to be in the range of 3-24V.

Meanwhile, the eccentric wheel 42 is easy to wear when being pressed for a long time in work, so in the implementation, the eccentric wheel 42 is made of plastic POK with more outstanding wear resistance, the wear resistance of the POK is 14 times that of POM, the wear consumption is extremely low, the dimensional stability is high after long-term use, the influence of temperature change is very small, and the low-noise effect is outstanding; the material has excellent hydrolysis resistance, and the mechanical property change of the material is much smaller than that of nylon, polyester and the like no matter in cold water or hot water, so that the material can be used in a water environment for a long time; because of its compact crystal structure, it has excellent blocking effect on various substances, and is not oleophilic, hydrophilic and resistant to various chemical solvents.

The water inlet and outlet cover 1, the one-way valve seat 2, the main diaphragm seat 3 and the motor base 43 are made of PA66 or ABS plastic. Among them, the PA66 material is a semi-crystal material, which has the highest mechanical strength and high crystallinity in PA series, can maintain strong strength and rigidity at higher temperature, and has excellent wear-resisting property and self-lubricating property. ABS has excellent comprehensive physical and mechanical properties, good low-temperature impact resistance and good dimensional stability. Both can reduce because of the condition that the long-term pressurized wear appears skidding, guarantee the holistic life and the performance of the pump body.

Compared with the prior art, the diaphragm pump is provided with a pump body consisting of a water inlet and outlet cover made of PA66 material, a one-way valve seat, a main diaphragm seat and a motor base, wherein an eccentric wheel made of POK material is arranged in the pump body, a driving assembly is arranged to drive the eccentric wheel to rotate, and water inlet and water discharge actions of the pump body are realized by utilizing internal and external pressure difference. Compared with the prior art, the diaphragm pump can be used in a water environment for a long time, can keep stronger strength and rigidity at higher temperature, and has excellent wear-resisting property and self-lubricating property. The pump body is simple in structure, the types and the working voltages of the motors with more stable performance are selected, and the overall use performance of the diaphragm pump is guaranteed.

Finally, it should be noted that: the above examples are merely illustrative of the technical solutions of the present invention, and not limitative thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. Diaphragm pump, including the pump body and drive assembly (4) with pump body coupling, the pump body is connected with pivot (411) of drive assembly (4), a serial communication port, the pump body includes from last to lower inlet and outlet water cover (1), one-way disk seat (2) and main diaphragm seat (3) of fixed mounting in proper order, be provided with water inlet (11) and delivery port (12) on inlet and outlet water cover (1), one-way disk seat (2) are provided with out water diaphragm (21) towards inlet and outlet water cover (1) one side, deviate from inlet and outlet water cover (1) one side and be provided with a plurality of check valve diaphragms (22), nested main diaphragm (31) of installing integrated into one piece on main diaphragm seat (3), drive assembly (4) include 370 motor (41), install eccentric wheel (42) on 370 motor (41) pivot (411), motor base (43) on threaded fixation 370 motor (41) and be fixed in the support(s) on motor base (43) through stainless steel axle (45), (4) 44) The driving assembly (4) is used for driving the support (44) to swing so as to drive the main diaphragm (31) to reciprocate up and down.

2. The diaphragm pump according to claim 1, wherein a rubber gasket (23) is arranged between the water inlet and outlet cover (1) and the edge of the one-way valve seat (2), the rubber gasket (23) is uniformly provided with a plurality of inward arc-shaped notches in the circumferential direction, a circular boss (25) is arranged in the middle of one surface of the one-way valve seat (2) facing the water inlet and outlet cover (1), and an O-shaped ring (24) is arranged between the boss (25) and the water inlet and outlet cover (1).

3. The diaphragm pump according to claim 2, wherein a triangular limiting bump is arranged in the boss (25), the water outlet diaphragm (21) is sleeved in the boss (25), and the water outlet diaphragm (21) can reciprocate up and down along the axial direction of the boss (25).

4. The diaphragm pump according to claim 2, wherein the boss (25) of the one-way valve seat (2) is provided with a plurality of water outlet holes around the axis of the boss (25) and away from one side of the water outlet diaphragm (21), a plurality of insertion holes are correspondingly arranged outside the water outlet holes, a plurality of water inlet holes are circumferentially arranged outside the insertion holes, and the one-way valve diaphragm (22) is correspondingly and hermetically mounted on the insertion holes.

5. The diaphragm pump of claim 1, wherein the support (44) comprises a plurality of branches, each branch is provided with a limiting portion (441), the lower end of the main diaphragm (31) penetrates through the main diaphragm seat (3) and then is inserted into the limiting portions (441), and when the one-way valve seat (2) is connected with the main diaphragm (31), the one-way valve seat (2) and the main diaphragm (31) are matched to form three independently sealed main diaphragm cavities (311).

6. Diaphragm pump according to claim 1, characterized in that the eccentric wheel (42) is mounted on the rotating shaft (411) of the 370 motor (41), the eccentric wheel (42) is provided with an eccentric hole, one end of the stainless steel shaft (45) is obliquely inserted into the eccentric hole, the other end is connected with the bracket (44), and when the driving assembly (4) works, the eccentric wheel (42) rotates to drive the bracket (44) to swing.

7. The diaphragm pump according to claim 1, wherein the water inlet and outlet cover (1), the one-way valve seat (2) and the main diaphragm seat (3) are fixed by a plurality of self-tapping screws (13) in a threaded manner, and the self-tapping screws (13) are uniformly arranged on the water inlet and outlet cover (1) in the circumferential direction and then penetrate through the one-way valve seat (2) and the main diaphragm seat (3) to be connected and fixed.

8. The diaphragm pump according to claim 1, wherein the water inlet and outlet cover (1), the one-way valve seat (2), the main diaphragm seat (3) and the motor base (43) are made of PA66 or ABS, the eccentric wheel (42) is made of POK, and the bracket (44) is made of POM.

9. Diaphragm pump according to claim 1, characterized in that the material of the main diaphragm (31) is rubber EPDM.

10. Diaphragm pump according to claim 1, characterized in that the 370 motor (41) is set to an operating voltage range of 3-24V.