CN109838371A

CN109838371A - Diaphragm pump

Info

Publication number: CN109838371A
Application number: CN201711230649.2A
Authority: CN
Inventors: 许清香; 许小峰
Original assignee: XIAMEN KEJI PRECISION EQUIPMENT CO Ltd
Current assignee: XIAMEN KEJI PRECISION EQUIPMENT CO Ltd
Priority date: 2017-11-29
Filing date: 2017-11-29
Publication date: 2019-06-04
Anticipated expiration: 2037-11-29
Also published as: CN109838371B

Abstract

The invention discloses a kind of diaphragm pumps, it include: cover assembly, the cover assembly limits inlet plenum and discharge chamber, the discharge chamber has gas outlet and pressure relief opening, the cover assembly includes: upper cover and relief valve, the upper cover has outlet passageway and pressure release passage, and the outlet passageway is connected to the discharge chamber, and the relief valve, which is movably disposed in the pressure release passage, is used to open or closes the pressure relief opening；Piston component and driving assembly, the cover assembly is formed with the first return port, the piston component is formed with the second return port being connected to first return port, the driving component structure sets out pumping diaphragm chamber, wherein, first return port is connected to the pressure release passage, and second return port is connected to the pumping diaphragm chamber.Diaphragm pump according to an embodiment of the present invention increases the space of pressure release, enables diaphragm pump quick pressure releasing, the pressure in diaphragm pump is allowed to keep required pressure value by the way that discharge chamber to be connected to inlet plenum.

Description

Diaphragm pump

Technical field

The present invention relates to pump technical field more particularly to a kind of diaphragm pumps.

Background technique

Conventional diaphragm pump lets out that speed is slow, and diaphragm pump can not be rapidly achieved pressure value required for user.

Summary of the invention

The present invention is directed to solve one of above-mentioned technical problem at least to a certain extent.

For this purpose, the present invention proposes a kind of diaphragm pump, the diaphragm pump pressure release speed is fast.

Diaphragm pump according to an embodiment of the present invention, comprising: cover assembly, piston component and driving assembly, the upper cover group Part limits inlet plenum and discharge chamber, and the discharge chamber has gas outlet and pressure relief opening；The cover assembly includes: upper cover and lets out There is outlet passageway and pressure release passage and inlet channel, the outlet passageway to be connected to the discharge chamber for pressure valve, the upper cover, The relief valve, which is movably disposed in the pressure release passage, is used to open or closes the pressure relief opening；The cover assembly, institute It states piston component and the driving component is sequentially connected, the cover assembly is formed with the first return port, the piston component shape Second return port of the connection of the first return port described in Cheng Youyu, the driving component structure set out pumping diaphragm chamber, wherein described first time Discharge orifice is connected to the pressure release passage, and second return port is connected to the inlet channel.

Diaphragm pump according to an embodiment of the present invention increases the space of pressure release, makes by the way that discharge chamber to be connected to inlet plenum Diaphragm pump can quick pressure releasing, pressure value needed for allowing the pressure in diaphragm pump to keep.

In addition, diaphragm pump according to an embodiment of the present invention, can also have the following additional technical features:

According to some embodiments of the present invention, the diaphragm pump further include: elastic parts, the elastic parts are only butted on institute State the upper surface of relief valve.

According to some embodiments of the present invention, the elastic parts includes: bushing, pressure spring and locating part.The bushing limit Make movable chamber；Stop the upper surface for being butted on the relief valve in described pressure spring one end；The locating part is arranged in the movable chamber, The other end of the pressure spring upwardly extends along the extending direction of the movable chamber and is only butted on the lower end surface of the locating part.

According to some embodiments of the present invention, the upper surface of the closure, which upwardly extends, is formed with positioning protrusion, described One end of pressure spring is set around the positioning protrusion.

According to some embodiments of the present invention, the elastic parts further include: fixing seat, the fixed seating are set to described The outer peripheral surface of positioning protrusion, lower end week of the fixing seat along having extended outward to form locating flange, under the locating flange Surface is bonded with the upper surface of the closure.

According to some embodiments of the present invention, the peripheral wall of the movable chamber is formed with a plurality of guiding in axial direction extended Muscle.

According to some embodiments of the present invention, the discharge chamber is divided into multiple compartments, each compartment with it is described Diversion trench is equipped between pressure relief opening.

According to some embodiments of the present invention, the airflow channel that the discharge chamber is formed is from the compartment to the diversion trench It is gradually reduced.

According to some embodiments of the present invention, the cover assembly further include:

Valve seat, the valve seat have air inlet and venthole；

Valve block, the valve block have for opening and closing the air inlet breather check valve and for opening and closing The outgassing nonreturn valve of the venthole.

According to some embodiments of the present invention, the lower end surface of the closure is equipped with annular convex lip, the annular convex lip Radial dimension is greater than the radial dimension of the pressure relief opening.

According to some embodiments of the present invention, the top surface of the compartment is equipped with limited post, the limited post and the outlet Check valve sheet is oppositely arranged in above-below direction.

According to some embodiments of the present invention, the upper cover has exhaust pipe, and the exhaust pipe has by extending setting There are 90 degree of dog-ears.

According to some embodiments of the present invention, the upper cover have third return port, the third return port and it is described into Gas chamber communicates.

Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:

Fig. 1 is the cross-sectional view of diaphragm pump according to an embodiment of the invention；

Fig. 2 is the top view of upper cover according to an embodiment of the invention；

Fig. 3 is the perspective view of upper cover according to an embodiment of the invention；

Fig. 4 is the cross-sectional view in Fig. 3 along line A-A；

Fig. 5 is the cross-sectional view of elastic parts and relief valve according to an embodiment of the invention.

Appended drawing reference:

Diaphragm pump 100；

Cover assembly 10；Inlet plenum 11；Discharge chamber 12；Gas outlet 121；Pressure relief opening 122；Compartment 123；Diversion trench 124；Out Gas channel 13；Pressure release passage 14；First pressure release passage 141；Second pressure release passage 142；Inlet channel 15；Upper cover 16；First time Discharge orifice 161；Third return port 162；；Limited post 163；Valve block 17；Valve seat 18；Exhaust pipe 19；

Relief valve 20；Positioning protrusion 221；

Elastic parts 30；Bushing 31；Movable chamber 32；Guiding rib 321；Pressure spring 33；Locating part 34；Fixing seat 35；Convex Edge 351；

Piston component 40；Mounting base 41；Air bag 42；Substrate 421；Blister cavities 422；Second return port 43.

Driving assembly 50；Driving motor 51；Transmission shaft 52；Link assembly 53；Pumping diaphragm chamber 54.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.

Diaphragm pump in the related technology can generate the airflow noise of puff puff during the pressure relief process, bring uncomfortable sense to user Feel, especially the case where diaphragm pump is applied to automotive seat, quiet vehicle environment makes pressure release airflow noise seem particularly evident.

Diaphragm pump 100 according to an embodiment of the present invention is described referring to Fig. 1 to Fig. 5, which is widely used in The fields such as medical instrument, household electrical appliance and automotive seat.It is as shown in Figure 1 the pressure leak process of diaphragm pump 100, the diaphragm pump 100 It substantially may include: cover assembly 10, piston component 40 and driving assembly 50.

Specifically, as shown in Figure 1, cover assembly 10 includes: upper cover 16, valve block 17 and valve seat 18, cover assembly 10 is limited Inlet plenum 11 and discharge chamber 12 out, discharge chamber 12 have gas outlet 121 and pressure relief opening 122.Wherein, upper cover 16 has outlet passageway 13 and pressure release passage 14 and inlet channel 15, pressure release passage 14 includes the first pressure release passage 141 and the second pressure release passage 142, Outlet passageway 13 is connected to discharge chamber 12, and relief valve 20 is equipped at the pressure relief opening 122 of discharge chamber 12, and relief valve 20 is movably set In being used to open or close pressure relief opening 122 in pressure release passage 14.

Cover assembly 10, piston component 40 and driving assembly 50 are sequentially connected, and cover assembly 10 is formed with the first return port 161, piston component 40 is formed with the second return port 43 being connected to the first return port 161, and 50 structure of driving assembly sets out pumping diaphragm chamber 54, wherein the first return port 161 is connected to the first pressure release passage 141.

As shown in Figure 1, valve seat 18 is equipped with air inlet and venthole, it is unidirectional that valve block 17 is equipped with air inlet corresponding with air inlet Valve and outgassing nonreturn valve corresponding with venthole.

As shown in Figure 1, piston component 40 includes mounting base 41 and air bag 42, mounting base 41 has mounting hole, and air bag 42 has There is substrate 421, the upper surface of substrate 421, which is recessed downwards, is formed with multiple blister cavities 422, wherein substrate 421 is attached at mounting base 41 Surface, 422 penetrating mounting holes of blister cavities, the second return port 43 are connected to inlet channel 15.

As shown in Figure 1, driving assembly 50 includes driving motor 51, transmission shaft 52 and link assembly 53, driving motor 51 Drive shaft is connect with one end of transmission shaft 52, and the other end of transmission shaft 52 is connect with link assembly 53, link assembly 53 and piston The connection of component 40 can drive blister cavities 422 to stretch or squeeze.

When the course of work of the diaphragm pump 100 stretches blister cavities 422 approximately as: link assembly 53, the volume of blister cavities 422 increases Greatly, gas is inhaled into inlet plenum 11, and breather check valve is opened, and gas enters in blister cavities 422, completes breathing process；Connection rod set When part 53 squeezes blister cavities 422, the volume of blister cavities 422 reduces, and outgassing nonreturn valve is opened, and gas is flowed out from blister cavities 422, and is passed through Gas outlet 121 flows into discharge chamber 12, finally flows out from gas outlet 121, completes exhaust process；When the pressure in discharge chamber 12 is super Out when predetermined pressure, relief valve 20 is opened, and the gas of discharge chamber 12 is at least partly exported, to play the role of pressure release.

In some specific embodiments, after relief valve 20 is opened, fraction is let out after passing through pressure relief opening 122 into first Pressure passageway 141, and being flowed downward by the first return port 161 and the second return port 43, finally by inlet channel 15 return into In gas chamber 12.Prevent diaphragm pump 100 from supplying gas to air charging system over-voltage as a result,.It is understood that above-described embodiment is only signal Property, it is not limiting the scope of the present invention, the gas being discharged from pressure relief opening 122 can also be directly discharged to extraneous sky In gas.

Diaphragm pump 100 according to an embodiment of the present invention increases the sky of pressure release by the way that discharge chamber to be connected to inlet plenum Between, enable diaphragm pump quick pressure releasing, the pressure in diaphragm pump is allowed to keep required pressure value.

In some embodiments of the invention, as shown in Fig. 1 combination Fig. 4 and Fig. 5, diaphragm pump 100 further include: elastic parts 30, elastic parts 30 stops the upper surface for being butted on relief valve 20, it is to be understood that elastic parts 30 has initial elastic potential Can, under normal circumstances, the elastic parts 30 for being only butted on relief valve 20 limits relief valve 20 and moves up, once the pressure of discharge chamber 12 Force value is more than preset value, and relief valve 20 can overcome elastic force to move up to open pressure relief opening.

In some embodiments, such as Fig. 5, elastic parts 30 includes: bushing 31, pressure spring 33 and locating part 34.Bushing 31 limits The upper surface for being butted on relief valve 20 is stopped in movable chamber 32 out, 33 one end of pressure spring, and locating part 34 is arranged in movable chamber 32, pressure spring 33 The other end upwardly extends along the extending direction of movable chamber 32 and is only butted on the lower end surface of locating part 34.In other words, pressure spring 33 is limited It is scheduled between relief valve 20 and locating part 34, in the case where the air pressure of discharge chamber 12 is less than preset value, by pressure spring 33 to letting out Pressure valve 20 applies downward active force, so that relief valve 20 closes pressure relief opening 122, prevents discharge chamber 12 from losing heart；In outlet In the case that the air pressure of room 12 is greater than preset value, relief valve 20, which is supported, to be opened, and pressure spring 33 is compressed, and gas is by letting out in discharge chamber 12 Mouth 122 is pressed to be discharged.

In alternative embodiment, locating part 34 and bushing 31 are interference fitted.I.e. the diameter of locating part 34 is slightly larger than movable chamber 32 Diameter, that is to say, that locating part 34 is held on opposing stationaryly in movable chamber 32, to play position-limiting action to pressure spring 33, Wherein, locating part 34 can be steel ball.

In further alternative embodiment, referring to Fig.1 and Fig. 5, the upper surface of relief valve 20, which upwardly extends, is formed with convex 221 are played, one end of pressure spring 33 is set around positioning protrusion 221, in this way, positioning protrusion 221 can prevent pressure spring 33 from shaking, mentions The stability of high pressure spring 33.

In one particular embodiment of the present invention, referring to Figure 5, elastic parts 30 further include: fixing seat 35, it is fixed Seat 35 is sheathed on the outer peripheral surface of positioning protrusion 221, along locating flange 351 has been extended outward to form, determines in the lower end week of fixing seat 35 The lower surface of position flange 351 is bonded with the upper surface of relief valve.Wherein, the material hardness of relief valve 20 is less than the material of fixing seat 35 Expect hardness, for example, relief valve 20 is prepared using rubber material flexible, and fixing seat 35 uses the biggish plastics system of hardness It is standby to form, so that pressure spring 33 is contacted with the biggish fixing seat 35 of hardness, so that pressure spring 33 is not sent out in movable chamber 32 Raw offset, has preferable stability.

In a preferred embodiment of the invention, as shown in connection with fig. 5 such as Fig. 1, the peripheral wall of movable chamber 32 is formed with along axis The a plurality of guiding rib 321 extended to direction, a plurality of guiding rib 321 limit bushing 31 in the freedom degree of circumferential direction, limit its edge It circumferentially rotates, improves the whole stability of elastic parts 30.

In some embodiments of the invention, as shown in figure 3, discharge chamber 12 is divided into multiple compartments 123, each compartment Between 123 and pressure relief opening 122 be equipped with diversion trench 124, discharge chamber 12 formed airflow channel from compartment 123 to diversion trench 124 by It is decrescence small.

That is, diversion trench 124 is connected to the indentation, there of compartment 123, diversion trench 124 is equal with the width of notch, and It can become orderly by the air-flow of narrow space, these gases entered in compartment 123 are let out by the orderly flow direction of diversion trench 124 Mouth 122 is pressed to reduce 100 course of work of diaphragm pump in this way, the air-flow by guiding role is smaller to the impact of diaphragm pump 100 In noise.

In some preferred embodiments, as the top surface of Fig. 3, compartment are equipped with limited post 163, limited post 163 and outgassing nonreturn valve Piece is oppositely arranged in above-below direction.In the diaphragm pump course of work, the effect that outgassing nonreturn valve is under pressure is to open outlet Hole, but in the long-term use process, inventor passes through observation and experiment discovery, sometimes, the outlet in diaphragm pump 100 Check valve can not sometimes be resetted because expansion angle is excessive so as to cause the failure of diaphragm pump 100.It is asked to solve this Topic, inventor are provided limited post 163 in each compartment 123 position opposite with outgassing nonreturn valve, avoid outgassing nonreturn valve Overextended, extends the service life of diaphragm pump 100, in addition, have passed through the outgassing nonreturn valve of position-limiting action can make diaphragm It pumps 100 each output flows to become stable, further reduces the noise generated in 100 course of work of diaphragm pump.

In some embodiments, as shown in Figure 1, Figure 2, Figure 3 and Figure 4, upper cover has exhaust pipe 19, and exhaust pipe 19 is by extending Setting, and there are 90 degree of dog-ears.It is folded into the gas in exhaust pipe 19 by 90 degree, the flow direction of gas is changed, by folding To the flowed energy of effect reduce, flow velocity is slack-off, therefore becomes flat with the friction of exhaust wall, further reduce every The noise of membrane pump 100.

In some embodiments, as shown in Figure 1, upper cover 16 also has third return port 162, third return port 162 and air inlet Room 11 communicates.After relief valve 20 is opened, fraction enters the second pressure release passage 142 after passing through pressure relief opening 122, and leads to It crosses third return port 162 and flows directly into inlet plenum 11.Diaphragm pump 100 operates in intake process, flows back into the gas of inlet plenum 11 Body is again introduced into inlet channel 15, achievees the purpose that pressure release with this.Wherein, the first pressure release passage 141 and the second pressure release passage 142 Setting that can be relatively independent, that is to say, that diaphragm pump 100 is at least provided with one in pressure release passage 14.

Diaphragm pump 100 other are constituted and operation belongs to those of ordinary skill in the art and understands and be easy to get , it is no longer repeated herein.

In the description of the present invention, it is to be understood that, term " on ", "lower" ", bottom ", "inner", "outside", "front", "rear" The orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of the description present invention and Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction And operation, therefore be not considered as limiting the invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower" It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above " Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " following " include fisrt feature right above second feature and oblique upper, or be merely representative of First feature horizontal height is less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any One or more embodiment or examples in can be combined in any suitable manner.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.

Claims

1. a diaphragm pump, is characterized in that, comprises:

An upper cover assembly, the upper cover assembly defines an air inlet chamber and an air outlet chamber, the air outlet chamber has an air outlet and a pressure relief port, and the upper cover assembly includes:

an upper cover, the upper cover has an air outlet channel, a pressure relief channel and an air inlet channel, and the air outlet channel is communicated with the air outlet chamber;

a pressure relief valve, which is movably arranged in the pressure relief passage for opening or closing the pressure relief port;

A piston assembly and a drive assembly, the upper cover assembly, the piston assembly and the drive assembly are connected in sequence, the upper cover assembly is formed with a first return hole, and the piston assembly is formed with a communication with the first return hole The drive assembly forms a pump membrane cavity, wherein the first return hole communicates with the pressure relief channel, and the second return hole communicates with the intake channel.

2 . The diaphragm pump according to claim 1 , further comprising: an elastic component, the elastic component abuts against the upper surface of the pressure relief valve. 3 .

3. The diaphragm pump according to claim 2, wherein the elastic component comprises:

a bushing that defines an active cavity;

a compression spring, one end of the compression spring abuts against the upper surface of the pressure relief valve;

The limiting member is clamped in the movable cavity, and the other end of the compression spring extends upward along the extending direction of the movable cavity and stops against the lower end surface of the limiting member.

4 . The diaphragm pump according to claim 3 , wherein a positioning protrusion is formed extending upward on the upper surface of the pressure relief valve, and one end of the compression spring is wound around the positioning protrusion. 5 .

5 . The diaphragm pump according to claim 4 , wherein the elastic component further comprises: a fixing seat, the fixing seat is sleeved on the outer peripheral surface of the positioning protrusion, and the lower end of the fixing seat is peripheral edge. 6 . A positioning flange is formed extending outward, and the lower surface of the positioning flange is in contact with the upper surface of the pressure relief valve.

6 . The diaphragm pump according to claim 3 , wherein a plurality of guide ribs extending in the axial direction are formed on the peripheral wall of the movable cavity. 7 .

7 . The diaphragm pump according to claim 1 , wherein the air outlet chamber is divided into a plurality of compartments, and a diversion groove is provided between each of the compartments and the pressure relief port. 8 .

8 . The diaphragm pump according to claim 7 , wherein the air flow channel formed by the air outlet chamber gradually decreases from the compartment to the guide groove. 9 .

9. The diaphragm pump according to claim 7, wherein the upper cover assembly further comprises:

a valve seat, the valve seat has an air inlet hole and an air outlet hole;

The valve plate has an intake check valve for opening and closing the intake hole and an outlet check valve for opening and closing the air outlet hole.

10 . The diaphragm pump according to claim 9 , wherein a limit post is provided on the top surface of the compartment, and the limit post is arranged opposite to the air outlet check valve sheet in the up and down direction. 11 .

11 . The diaphragm pump according to claim 1 , wherein the upper cover has an exhaust pipe, and the exhaust pipe is extended and has a 90-degree angle. 12 .

12 . The diaphragm pump according to claim 1 , wherein the upper cover has a third return hole, and the third return hole communicates with the intake chamber. 13 .