CN213039429U - Improved miniature diaphragm pump - Google Patents

Abstract

The utility model relates to an improved micro diaphragm pump, which comprises a pump body (1); a motor (2) connected with the pump body (1); the pump body (1) is provided with a pressure relief water inlet hole (16) and a pressure relief water outlet hole (17), and a backflow component (18) is arranged in the pump body; the pump body (1) is also internally provided with an accommodating cavity (19) which is used for associating the pressure relief water inlet hole (16) with the pressure relief water outlet hole (17) and is formed between the pressure relief water inlet hole (16) and the pressure relief water outlet hole (17); the backflow component (18) is partially positioned in the accommodating cavity (19) and can move along the depth direction of the accommodating cavity (19) in cooperation with water flow pressure to open or close the pressure relief water outlet hole (17) so as to enable the pressure relief water inlet hole (16) to be communicated with or disconnected from the pressure relief water outlet hole (17). Compared with the prior art, the utility model discloses can effectively improve miniature diaphragm pump's wholeness ability.

Description

Improved miniature diaphragm pump

Technical Field

The utility model relates to an electronic field especially relates to a miniature diaphragm pump of modified.

Background

The miniature diaphragm pump is widely used in industrial and agricultural life, and generally comprises a pump body, a pump cover positioned outside the pump body, a backflow component positioned in the pump body, and a direct current motor connected with the pump body, wherein the motor rotates and is combined with water flow pressure flowing into the pump body to drive the backflow component to open or close so as to realize the water pumping function.

The utility model discloses a high-efficient diaphragm pump of atomizer like utility model CN201606227U discloses, the diaphragm in this diaphragm pump is equipped with the connecting rod, the connecting rod links to each other with the epaxial eccentric bearing of motor, the pump head surface is equipped with upper cover plate and lower apron, the motor is through mount and leg joint pump head, the pressure regulating reflux unit includes the backward flow switch body, install water sealing piece and the water sealing piece retainer plate in the backward flow switch body, the motor shaft drives eccentric bearing, eccentric bearing drives the connecting rod, the connecting rod drives the vibration of the upper and lower diaphragm in the pump head, imbibition and spraying pesticide through business turn over water valve.

Compared with the prior art, the pump body improves the spraying efficiency of the pump, but has many problems, the pump body with the structure is only suitable for the working environment with low pressure and low power, cannot bear overhigh pressure or power, has unstable flow, and is easy to cause vibration increase, noise increase and quick abrasion once pressurization or power improvement, thereby greatly shortening the service life.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide an improved miniature diaphragm pump with stable flow and pressure, which is suitable for high-pressure and high-power environment, low noise, long service life and high efficiency.

In order to realize the purpose, the technical scheme of the utility model is that: an improved miniature diaphragm pump comprises a pump body;

a motor connected with the pump body;

the pump body is provided with a pressure relief water inlet hole and a pressure relief water outlet hole, and a backflow assembly is arranged in the pump body;

the method is characterized in that:

the pump body is also internally provided with an accommodating cavity which is used for associating the pressure relief water inlet hole with the pressure relief water outlet hole and is formed between the pressure relief water inlet hole and the pressure relief water outlet hole;

the backflow component part is positioned in the accommodating cavity and can move along the depth direction of the accommodating cavity under the action of water flow pressure to open or close the pressure relief water outlet hole so that the pressure relief water inlet hole is communicated with or disconnected from the pressure relief water outlet hole.

Furthermore, the accommodating cavity is formed along the direction of the pressure relief water outlet;

the backflow assembly comprises a backflow cover, a backflow pressure relief valve assembly and a spring, wherein the backflow cover is located at the front end of the pump body and covers the pressure relief water inlet hole and the pressure relief water outlet hole, the backflow pressure relief valve assembly is located in the accommodating cavity and is used for blocking the pressure relief water outlet hole, and the two ends of the backflow pressure relief valve assembly are respectively connected with the backflow cover and the backflow pressure relief valve assembly correspondingly and provide acting force for opening and closing the pressure relief water outlet hole.

Furthermore, the backflow relief valve assembly comprises a backflow valve core seat and a backflow valve core, wherein the backflow valve core seat is made of hard materials, one end of the backflow valve core seat is connected with the spring, the backflow valve core is made of soft materials and is fixedly connected with the backflow valve core seat to seal the pressure relief water outlet hole.

Furthermore, the outer surface of the backflow valve core is connected with the inner wall of the backflow valve core seat in a reverse buckling mode.

Furthermore, the cavity wall of the accommodating cavity is provided with two drainage grooves which are oppositely arranged and extend from the free end of the cavity wall to the tail end of the cavity wall, and the drainage grooves communicate the drainage water outlet holes with the drainage water inlet holes.

Furthermore, the backflow component further comprises an O-shaped sealing ring located at the joint of the backflow cover and the pump body.

Furthermore, an eccentric wheel is arranged at the front end of the shaft of the motor, and the miniature diaphragm pump further comprises a connecting rod which is connected with the pump body and sleeved and fixed on the periphery of the eccentric wheel;

the connecting rod is a cylindrical body with one end surface closed and the other end surface provided with a through hole for the eccentric wheel to extend into, and the closed surface part of the connecting rod is in a bag shape corresponding to the end surface of the eccentric wheel for oil storage.

Further, the connecting rod is made of aluminum alloy.

Compared with the prior art, the utility model has the advantages of: the improved backflow component effectively solves the problems of low working efficiency, unstable flow, unstable pressure, large vibration, large noise and large loss of the diaphragm pump caused by the fact that the soft material is permanently deformed due to the fact that the soft material is only adopted to seal and release the water outlet hole in the past for a long time, and greatly improves the overall performance of the diaphragm pump; the connecting rod is of a tubular structure with one closed end and an oil storage bag, so that the motor shaft can be lubricated for a long time, and the problems of poor strength and short service life of the conventional plastic connecting rod are solved.

Drawings

Fig. 1 is a schematic structural view of a micro diaphragm pump according to an embodiment of the present invention;

FIG. 2 is a first exploded view of FIG. 1;

FIG. 3 is an exploded view of the pump head assembly of FIG. 1;

FIG. 4(a) is a schematic view of a first angular configuration of the connecting rod of FIG. 1;

FIG. 4(b) is a schematic view of a second angular configuration;

FIG. 5(a) is a cross-sectional view of the pump head assembly of FIG. 1 taken along the line A-A;

FIG. 5(b) is another perspective view of FIG. 5 (a);

FIG. 5(c) is a top view of the pump head assembly with the return assembly removed;

FIG. 5(d) is a schematic illustration of a backflow valve core assembly configuration;

fig. 5(e) is a cross-sectional view of the reflow cover.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Fig. 1-3, 4(a) -4(b) and 5(a) -5(e) show an improved micro diaphragm pump structure according to an embodiment of the present invention. As shown in fig. 1 to 3, the improved micro diaphragm pump includes a pump body 1 having a pump cover 11 on a surface thereof, and a motor 2 connected to the pump body 1. The axle 21 front end of motor 2 in this diaphragm pump is equipped with eccentric wheel 22, adopt the cover to establish connecting rod 13 of fixing the plastics material in eccentric wheel 22 periphery in the trade at present and connect motor 2 and pump body 1, but plastics material intensity is poor, lubricating oil in order to reduce friction need be paintd to the motor shaft in the use simultaneously, delay ageing, and present connecting rod all is the front and back through pass through the pass-through hole type, this just means the motor shaft throws away lubricating oil very easily at the operation in-process, lead to the inside glutinous of the pump body to stick to paste, lubricated effect is not good.

In order to overcome this problem, as shown in fig. 4(a) -4(b), the connecting rod 13 is designed as a cylindrical body with one end face closed and the other end face opened with a through hole 131 for the eccentric wheel 22 to extend into, and the closed face portion of the connecting rod 13 is in the shape of a bladder 132 corresponding to the end face of the eccentric wheel 22 for storing oil. The connecting rod 13 in this embodiment is made of an aluminum alloy material.

So, lubricating oil generates heat when the motor rotates and softens and can follow the continental afterflow of saccular 132, make the contact surface of axle 21 and connecting rod 13 obtain the lubrication for a long time as far as possible, and the pump body during operation, the confining surface can be lived lubricating oil pocket, makes it difficult by the throw-out in connecting rod 13 to make the bearing on the eccentric wheel 22 on the axle 21 and the contact surface wearing and tearing of connecting rod 13 reduce, the life-span obtains promoting, and simultaneously, the aluminum alloy connecting rod can be high temperature resistant, non-deformable, and can bear the high pressure. Because motor 2 can produce a large amount of heats at the operation in-process, the motor surface can be scalded, for the convenience of carrying, is equipped with handle 23 on the motor 2, and the motor 2 afterbody is equipped with axial compressor fan blade 24 simultaneously in order to increase the motor radiating effect.

A pressure relief water inlet hole 16 and a pressure relief water outlet hole 17 are arranged in a pump body 1 of the diaphragm pump, as shown in figure 5(a), in order to realize the overpressure protection function of the miniature diaphragm pump, a backflow component 18 is assembled in the pump body, almost all the existing backflow components adopt a circular soft backflow pad to seal the pressure relief water outlet hole 17, when liquid flows out from the pressure relief water outlet hole 17 and the pressure reaches the spring thrust at the rear end of the backflow pad, the backflow pad is flushed away, so that the pressure relief water inlet hole 16 is communicated with the pressure relief water outlet hole 17, and when the pressure is reduced, the backflow pad is restored to seal the pressure relief water outlet hole 17 under the action of a spring, but the structure has a serious problem that the opening stroke of the backflow component with the structure is mostly adjusted through a screw which is positioned at the rear end of the backflow pad and connected with the spring, which is very inconvenient, and the backflow pad is easily deformed and embedded into the pressure relief water outlet hole due, therefore, the pressing force is reduced, the leakage amount is increased, the backflow amount is unstable, the liquid flows through the sealing surface, the shock is large, the sound is large, the production is complicated, and the efficiency is low.

This application improves for this reason, and is concrete, this pump body 1 is formed with holding chamber 19 between pressure release inlet opening 16 and pressure release apopore 17, and this holding chamber 19 can be associated pressure release inlet opening 16 and pressure release apopore 17, and backflow component 18 part is located holding chamber 19 and can move along holding chamber 19 degree of depth direction under the rivers pressure effect in order to open or close pressure release apopore 17 so that pressure release inlet opening 16 communicates or breaks off with pressure release apopore 17.

Specifically, as shown in fig. 5(a) -5(e), the accommodating cavity 19 is formed along the direction of the pressure relief water outlet hole 17, the backflow component 18 includes a backflow cover 181 located at the front end of the pump body 1 to cover the pressure relief water inlet hole 16 and the pressure relief water outlet hole 17, a backflow pressure relief valve component 182 located in the accommodating cavity 19 to block the pressure relief water outlet hole 17, and a spring 183 having two ends respectively connected to the backflow cover 181 and the backflow pressure relief valve component 182 and providing an acting force for opening and closing the pressure relief water outlet hole 17 for the backflow pressure relief valve component 182.

The top of the backflow cover 181 is provided with a positioning post 181A for fixing the spring 183, and the backflow relief valve assembly 182 includes a backflow valve core seat 182A made of a hard material and having one end connected to the spring 183, and a backflow valve core 182B made of a soft material and fixedly connected to the backflow valve core seat 182A for closing the pressure relief outlet hole 17.

Specifically, the backflow valve core 182B is made of rubber, the backflow valve core seat 182A is made of plastic PP, the sealing of the pressure relief hole can be effectively realized by utilizing the soft characteristic of rubber, the valve core does not collapse and deform by utilizing the hard characteristic of the valve core seat, and specifically, as shown in fig. 5(d), in order to fix the valve core, the backflow valve core seat 182A is wrapped on the periphery of the backflow valve core seat 182B, and the internal design of the backflow valve core seat is reversed to fix the valve core.

Meanwhile, the cavity wall of the accommodating cavity 19 is provided with two opposite drainage grooves 191 which extend from the free end of the cavity wall to the tail end of the cavity wall, and the drainage grooves 191 communicate the drainage water outlet 17 with the drainage water inlet 16. The accommodating cavity 19 can limit the position of the return valve core 182B, so that the spring 183, the return valve core 182B and the pressure relief water outlet 17 are kept on the same axis. In order to ensure the sealing performance of the return flow chamber, a 0-ring 184 is provided at the joint of the return flow cover 181 and the pump body 1.

When the water outlet is cut off, liquid flows in the direction shown by the arrows in fig. 5(a) -5(B), and the pressure of the pressure relief water outlet 17 is greater than the pressure of the spring 183, the liquid pushes the backflow valve core 182B sealed on the pressure relief water outlet 17 to open, so that the liquid flows to the backflow cavity from the pressure relief groove 191 and then flows back to the water inlet end from the pressure relief water inlet 16 to form backflow;

when the delivery port is opened, liquid thrust is less than spring 183 elasticity, return valve core 182B is pushed up to pressure release apopore 17 and is sealed with pressure release apopore 17 by spring 183, return valve core 182B's the stroke of opening can be according to hydraulic change automatically regulated, and water pressure is when big more, and it is big more to open the stroke, and the discharge is big more, vice versa, and this structure makes flow stability, pressure stability, and sound little, and spring pressure can once only target in place, and it is efficient to save time.

In addition to the above-mentioned modifications, other similar modifications are also included in the scope of the present invention, and are not described herein in detail.

While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. An improved miniature diaphragm pump comprises a diaphragm pump body,

a pump body (1);

a motor (2) connected with the pump body (1);

the pump body (1) is provided with a pressure relief water inlet hole (16) and a pressure relief water outlet hole (17), and a backflow component (18) is arranged in the pump body;

the method is characterized in that:

the pump body (1) is also internally provided with an accommodating cavity (19) which is used for associating the pressure relief water inlet hole (16) with the pressure relief water outlet hole (17) and is formed between the pressure relief water inlet hole (16) and the pressure relief water outlet hole (17);

the backflow component (18) is partially positioned in the accommodating cavity (19) and can move along the depth direction of the accommodating cavity (19) in cooperation with water flow pressure to open or close the pressure relief water outlet hole (17) so as to enable the pressure relief water inlet hole (16) to be communicated with or disconnected from the pressure relief water outlet hole (17).

2. The improved miniature diaphragm pump of claim 1 wherein:

the accommodating cavity (19) is formed along the direction of the pressure relief water outlet hole (17);

the backflow component (18) comprises a backflow cover (181) which is located at the front end of the pump body (1) and covers the pressure relief water inlet hole (16) and the pressure relief water outlet hole (17), a backflow pressure relief valve component (182) which is located in the accommodating cavity (19) and covers the pressure relief water outlet hole (17), and a spring (183) which is connected with the backflow cover (181) and the backflow pressure relief valve component (182) at two ends and provides acting force for opening and closing the pressure relief water outlet hole (17) for the backflow pressure relief valve component (182).

3. The improved miniature diaphragm pump of claim 2 wherein:

the backflow pressure relief valve component (182) comprises a backflow valve core seat (182A) which is made of hard materials and one end of which is connected with the spring (183), and a backflow valve core (182B) which is made of soft materials and is fixedly connected with the backflow valve core seat (182A) to seal the pressure relief water outlet hole (17).

4. An improved miniature diaphragm pump according to claim 3 wherein:

the outer surface of the backflow valve core (182B) is connected with the inner wall of the backflow valve core seat (182A) in an inverted buckling mode.

5. The improved miniature diaphragm pump of claim 2 wherein:

the wall of the accommodating cavity (19) is provided with two opposite drainage grooves (191) which extend from the free end of the wall of the cavity to the tail end of the wall of the cavity, and the drainage grooves (191) communicate the pressure relief water outlet (17) with the pressure relief water inlet (16).

6. The improved miniature diaphragm pump of claim 2 wherein:

the backflow component (18) further comprises an O-shaped sealing ring (184) located at the joint of the backflow cover (181) and the pump body (1).

7. The improved miniature diaphragm pump of claim 1 wherein:

an eccentric wheel (22) is arranged at the front end of a shaft (21) of the motor (2), and the miniature diaphragm pump further comprises a connecting rod (13) which is connected with the pump body (1) and is sleeved and fixed on the periphery of the eccentric wheel (22);

the connecting rod (13) is a cylindrical body with one closed end face and the other end face provided with a through hole (131) for the eccentric wheel (22) to extend into, and the closed surface part of the connecting rod (13) is a bladder-shaped body (132) corresponding to the end face of the eccentric wheel (22) for oil storage.

8. The improved miniature diaphragm pump of claim 7 wherein:

the connecting rod (13) is made of aluminum alloy.

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