CN207740148U - Diaphragm pump - Google Patents

Abstract

The utility model discloses a kind of diaphragm pumps, including：Cover assembly, the cover assembly limit inlet plenum and discharge chamber, and the discharge chamber includes with gas outlet and pressure relief opening, the cover assembly：There is outlet passageway and pressure release passage, the outlet passageway to be connected to the discharge chamber for upper cover and relief valve, the upper cover, 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 drive component, 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 the present utility model 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 utility model is related to pump technical field more particularly to a kind of diaphragm pumps.

Background technology

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

Utility model content

The utility model is intended to solve one of above-mentioned technical problem at least to a certain extent.

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

According to the diaphragm pump of the utility model embodiment, including：Cover assembly, piston component and drive component, it is described on Cap assemblies limit inlet plenum and discharge chamber, and the discharge chamber has gas outlet and pressure relief opening；The cover assembly includes：Upper cover And relief valve, the upper cover have outlet passageway and pressure release passage and inlet channel, the outlet passageway and the discharge chamber Connection, the relief valve, which is movably disposed in the pressure release passage, is used to open or closes the pressure relief opening；The upper cover group Part, the piston component and the driving component are sequentially connected, and the cover assembly is formed with the first return port, the piston group Part is formed with the second return port being connected to first return port, and the driving component structure sets out pumping diaphragm chamber, wherein described One return port is connected to the pressure release passage, and second return port is connected to the inlet channel.

According to the diaphragm pump of the utility model embodiment the sky of pressure release is increased 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 addition, according to the diaphragm pump of the utility model embodiment, there can also be following additional technical characteristic：

Some embodiments according to the present utility model, the diaphragm pump further include：Elastic parts, the elastic parts only support In the upper surface of the relief valve.

Some embodiments according to the present utility model, the elastic parts include：Bushing, compression spring and locating part.The lining Set limits movable chamber；Stop the upper surface for being butted on the relief valve in described compression spring one end；The locating part is arranged in the activity The other end of intracavitary, the compression spring upwardly extends along the extending direction of the movable chamber and is only butted on the lower end of the locating part Face.

Some embodiments according to the present utility model, the upper surface of the closure, which upwardly extends, is formed with positioning protrusion, One end of the compression spring is set around the positioning protrusion.

Some embodiments according to the present utility model, the elastic parts further include：Fixed seat, the fixed seating are set to The lower end week edge of the peripheral surface of the positioning protrusion, the fixed seat has extended outward to form locating flange, the locating flange Lower surface be bonded with the upper surface of the closure.

Some embodiments according to the present utility model, the peripheral wall of the movable chamber be formed in axial direction extend it is a plurality of Guiding rib.

Some embodiments according to the present utility model, the discharge chamber are divided into multiple compartments, each compartment with Diversion trench is equipped between the pressure relief opening.

Some embodiments according to the present utility model, the gas channel that the discharge chamber is formed are led from the compartment to described Chute is gradually reduced.

Some embodiments according to the present utility model, the cover assembly further includes：

Valve seat, the valve seat have air admission hole and venthole；

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

The lower face of some embodiments according to the present utility model, the closure is equipped with annular lip, the convex annular The radial dimension of lip is more than the radial dimension of the pressure relief opening.

Some embodiments according to the present utility model, the top surface of the compartment are equipped with limited post, the limited post with it is described Outgassing nonreturn valve piece is oppositely arranged in above-below direction.

There is exhaust pipe, the exhaust pipe to be arranged by extending for some embodiments according to the present utility model, the upper cover, And there are 90 degree of dog-ears.

Some embodiments according to the present utility model, the upper cover have third return port, the third return port and institute Inlet plenum is stated to communicate.

The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description In become apparent, or recognized by the practice of the utility model.

Description of the drawings

The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination following accompanying drawings to embodiment Become apparent and is readily appreciated that, wherein：

Fig. 1 is the sectional view according to the diaphragm pump of the utility model one embodiment；

Fig. 2 is the vertical view according to the upper cover of the utility model one embodiment；

Fig. 3 is the stereogram according to the upper cover of the utility model one embodiment；

Fig. 4 is the sectional view along line A-A in Fig. 2；

Fig. 5 is the sectional view of the elastic parts and relief valve according to the utility model one embodiment.

Reference numeral：

Diaphragm pump 100；

Cover assembly 10；Inlet plenum 11；Discharge chamber 12；Gas outlet 121；Pressure relief opening 122；Compartment 123；Diversion trench 124；Go 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；Compression spring 33；Locating part 34；Fixed seat 35；Convex Edge 351；

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

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

Specific implementation mode

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.

Diaphragm pump in the related technology will produce the airflow noise of puff puff in pressure leak process, and uncomfortable sense is brought 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.

Referring to Fig. 1 to Fig. 5 descriptions according to the diaphragm pump 100 of the utility model embodiment, which answers extensively For fields such as medical instrument, household electrical appliance and automotive seats.It is the pressure leak process of diaphragm pump 100, the diaphragm pump as shown in Figure 1 100 substantially may include：Cover assembly 10, piston component 40 and drive component 50.

Specifically, as shown in Figure 1, cover assembly 10 includes：Upper cover 16, valve block 17 and valve seat 18, cover assembly 10 limit Go out inlet plenum 11 and discharge chamber 12, discharge chamber 12 has 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 drive component 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 drive component 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 admission hole and venthole, it is unidirectional that valve block 17 is equipped with air inlet corresponding with air admission hole Valve and outgassing nonreturn valve corresponding with venthole.

As shown in Figure 1, piston component 40 includes mounting base 41 and air bag 42, there is mounting base 41 mounting hole, air bag 42 to have Have a substrate 421, the upper table of substrate 421 downwards concave shape at there is multiple blister cavities 422, wherein substrate 421 is attached at mounting base 41 surfaces, 422 penetrating mounting holes of blister cavities, the second return port 43 are connected to inlet channel 15.

As shown in Figure 1, drive component 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.

The course of work of the diaphragm pump 100 approximately as：When link assembly 53 stretches blister cavities 422, 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, is finally flowed out from gas outlet 121, completes exhaust process；When the pressure in discharge chamber 12 is super When going out 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 overvoltage as a result,.It is understood that above-described embodiment is only signal Property, it is not the restriction to scope of protection of the utility model, the gas being discharged from pressure relief opening 122 can also be directly discharged to outer In boundary's air.

According to the diaphragm pump 100 of the utility model embodiment pressure release is increased by the way that discharge chamber to be connected to inlet plenum Space enables diaphragm pump quick pressure releasing, and the pressure in diaphragm pump is allowed to keep required pressure value.

In some embodiments of the utility model, as shown in Fig. 1 combinations Fig. 4 and Fig. 5, diaphragm pump 100 further includes：Elasticity Component 30, elastic parts 30 stop the upper surface for being butted on relief valve 20, it is to be understood that elastic parts 30 has initial elasticity Potential energy, under normal circumstances, the limitation relief valve 20 of elastic parts 30 for being only butted on relief valve 20 move up, once discharge chamber 12 Pressure 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, compression spring 33 and locating part 34.Bushing 31 limits Go out movable chamber 32, the upper surface for being butted on relief valve 20 is stopped in 33 one end of compression spring, and locating part 34 is arranged in movable chamber 32, compression spring 33 The other end upwardly extends along the extending direction of movable chamber 32 and is only butted on the lower face of locating part 34.In other words, compression 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 compression 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 more than preset value, relief valve 20 is by opening, and compression 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 is interference fitted with bushing 31.I.e. the diameter of locating part 34 is slightly larger than movable chamber 32 Diameter, that is to say, that locating part 34 by opposing stationary is held in movable chamber 32, to play position-limiting action to compression 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 compression spring 33 is set around positioning protrusion 221, in this way, positioning protrusion 221 can prevent compression spring 33 from shaking, Improve the stability of compression spring 33.

In a specific embodiment of the utility model, referring to Figure 5, elastic parts 30 further includes：Fixed seat 35, Fixed seat 35 is sheathed on the peripheral surface of positioning protrusion 221, and the lower end week edge of fixed seat 35 has extended outward to form locating flange 351, the lower surface of locating flange 351 is bonded with the upper surface of relief valve.Wherein, the material hardness of relief valve 20 is less than fixed seat 35 material hardness, for example, relief valve 20 is prepared using rubber material flexible, and fixed seat 35 is larger using hardness Plastics are prepared, so that the fixed seat 35 larger with hardness of compression spring 33 contacts, so that compression spring 33 is in movable chamber 32 In do not shift, have preferable stability.

In a preferred embodiment of the utility model, as shown in Fig. 1 combinations Fig. 5, the peripheral wall of movable chamber 32 is formed with The a plurality of guiding rib 321 in axial direction extended, a plurality of guiding rib 321 limit bushing 31 in the degree of freedom of circumferential direction, limitation It is circumferentially rotated, and improves the whole stability of elastic parts 30.

In some embodiments of the utility model, as shown in figure 3, discharge chamber 12 is divided into multiple compartments 123, each Diversion trench 124 is equipped between compartment 123 and pressure relief opening 122, the gas channel that discharge chamber 12 is formed is from compartment 123 to diversion trench 124 are gradually reduced.

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 Pressure mouth 122 reduces 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 during long-term use, utility model people is by observing and testing discovery, sometimes, in diaphragm pump 100 Outgassing nonreturn valve sometimes can not be resetted and be failed so as to cause diaphragm pump 100 because expansion angle is excessive.In order to solve this One problem, utility model people are provided limited post 163 in the position opposite with outgassing nonreturn valve of each compartment 123, avoid out Gas check valve overextended, extends the service life of diaphragm pump 100, in addition, have passed through the outgassing nonreturn valve meeting of position-limiting action So that 100 each output flow of diaphragm pump becomes stable, the noise generated in 100 course of work of diaphragm pump is further reduced.

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, changes the flow direction of gas, by folding To the flowed energy of effect reduce, flow velocity is slack-off, therefore is become 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 Inlet plenum 11 is flowed directly by third return port 162.Diaphragm pump 100 operates in intake process, flows back into inlet plenum 11 Gas 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 can be relatively independent setting, 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 should be understood that term "upper", "lower" ", bottom ", "inner", "outside", " preceding ", The orientation or positional relationship of instructions such as " rear " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this reality With novel and simplified description, does not indicate or imply the indicated device or element must have a particular orientation, with specific Azimuth configuration and operation, therefore should not be understood as limiting the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features are in direct contact, and can also not be to be in direct contact but lead to including the first and second features Cross the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the One feature is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special Sign second feature " under ", " lower section " and " below " include fisrt feature right over second feature and oblique upper, or only Indicate that fisrt feature level 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 contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be It can be combined in any suitable manner in any one or more embodiments or example.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and Modification.

Claims (12)

1. a kind of diaphragm pump, which is characterized in that including：

Cover assembly, the cover assembly limit inlet plenum and discharge chamber, and the discharge chamber has gas outlet and pressure relief opening, institute Stating cover assembly includes：

Upper cover, the upper cover have outlet passageway and pressure release passage and inlet channel, the outlet passageway and the discharge chamber Connection；

Relief valve, 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 drive component, the cover assembly, the piston component and the driving component are sequentially connected, it is described on Cap assemblies are formed with the first return port, the piston component is formed with the second return port being connected to first return port, institute State drive component structure and set out pumping diaphragm chamber, wherein first return port is connected to the pressure release passage, second return port with The inlet channel connection.

2. diaphragm pump according to claim 1, which is characterized in that further include：Elastic parts, the elastic parts are only butted on The upper surface of the relief valve.

3. diaphragm pump according to claim 2, which is characterized in that the elastic parts includes：

Bushing, the bushing limit movable chamber；

The upper surface for being butted on the relief valve is stopped in compression spring, described compression spring one end；

Locating part, the locating part are arranged in the movable chamber, and the other end of the compression spring is along the extension side of the movable chamber To the lower face for upwardly extending and being only butted on the locating part.

4. diaphragm pump according to claim 3, which is characterized in that the upper surface of the relief valve, which upwardly extends to be formed with, determines Position protrusion, one end of the compression spring is set around the positioning protrusion.

5. diaphragm pump according to claim 4, which is characterized in that the elastic parts further includes：Fixed seat, the fixation Cover for seat is set to the peripheral surface of the positioning protrusion, and the lower end week edge of the fixed seat has extended outward to form locating flange, described The lower surface of locating flange is bonded with the upper surface of the relief valve.

6. diaphragm pump according to claim 3, which is characterized in that the peripheral wall of the movable chamber, which is formed with, in axial direction to be prolonged The a plurality of guiding rib stretched.

7. diaphragm pump according to claim 1, which is characterized in that the discharge chamber is divided into multiple compartments, Mei Gesuo It states and is equipped with diversion trench between compartment and the pressure relief opening.

8. diaphragm pump according to claim 7, which is characterized in that the gas channel that the discharge chamber is formed is from the compartment It is gradually reduced to the diversion trench.

9. diaphragm pump according to claim 7, which is characterized in that the cover assembly further includes：

Valve seat, the valve seat have air admission hole and venthole；

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

10. diaphragm pump according to claim 9, which is characterized in that the top surface of the compartment is equipped with limited post, the limit Column is oppositely arranged in above-below direction with the outgassing nonreturn valve piece.

11. diaphragm pump according to claim 1, which is characterized in that there is the upper cover exhaust pipe, the exhaust pipe to pass through Extend setting, and there are 90 degree of dog-ears.

12. diaphragm pump according to claim 1, which is characterized in that there is the upper cover third return port, the third to return Discharge orifice is communicated with the inlet plenum.