CN104791228B - A kind of membrane pump - Google Patents
A kind of membrane pump Download PDFInfo
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- CN104791228B CN104791228B CN201510115605.XA CN201510115605A CN104791228B CN 104791228 B CN104791228 B CN 104791228B CN 201510115605 A CN201510115605 A CN 201510115605A CN 104791228 B CN104791228 B CN 104791228B
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Abstract
The present invention proposes a kind of membrane pump,Including housing,Barrier film suction structure component,Motor,Pump head component,Eccentric wheel is fixedly installed on the output shaft of motor,The barrier film suction structure component includes connecting rod,The oscillating bearing being connected with the connecting rod,The round tablet being connected with oscillating bearing,And the diaphragm of annular,The inner ring side of the diaphragm is pressed by the tabletting and fixed,Outer annular edge is fixed with the pump head component,The pump head component includes pump head seat,Valve block seat,Covered on pump head,Multiple breather check valves are provided between inlet channel and pump head cavity,Multiple exhaust check valves are provided between the exhaust passage and pump head cavity,The valve block of the breather check valve and exhaust check valve includes O-ring seal and the circular valve element being arranged on inside O-ring seal,The circular valve element is connected by two symmetrical connecting portions with the O-ring seal.This membrane pump long lifespan, pumping negative pressure are big, especially suitable air particle collection.
Description
Technical field
The present invention relates to a kind of membrane pump, and in particular to a kind of air particle collection membrane pump.
Background technology
The particulate solid of a large amount of different-grain diameters is left floating in surrounding air, in the concentration to environmental airborne particle thing
In detection, sampler isolates PM2.5 from air in the particulate matter of different quality and particle diameter, and (particle diameter is micro- less than or equal to 2.5
The particulate matter of rice), then by the air containing PM2.5 with certain flow rate by filter membrane, gather the specific time, PM2.5 filterings exist
On filter membrane, then filter membrane is weighed, remove the background weight of filter membrane, the ratio of cumulative volume of the increased weight with gathering is worth to
The particle concentration contained in the air of unit volume, Evaluation Environment air quality is come with this.Sampler utilizes aerodynamics
Principle, in sampling process, the air-flow velocity of sampling has particular requirement, national standard《HJ656-2013 ambient air particulate matters
PM2.5 craft monitoring method (gravimetric method) technical specification》It is required that PM2.5 sampling cutters and EPA (Environmental Protection Agency USA)
Discharge standard requires consistent, and sampling flow corresponding to sampler is all (1m3/ h) 16.7L/min and require airflow fluctuation not
More than ± 2%.A length of sampling 24 hours daily during sampling.Meanwhile the air-flow of sampling needs to overcome the resistance of filter membrane, standard requirement
Sampling membrane be to be made using glass fibre material or polytetrafluoroethylene (PTFE) material, the wherein filter membrane of polytetrafluoroethylene (PTFE) material
Performance is relatively stable to be usually used in Sources field, but teflon membrane filter permeability is poor, in 16.7L/min stream
The lower resistance of speed is larger, and vapour lock can reach 30KP or so, and more with the particulate matter of collection, and its resistance constantly rises, and this is just right
The pumping load capacity of sampling pump requires higher, moreover, in for portable air particulate matter detecting instrument, for instrument can be made
More portable, for aspiration pump on the premise of main pressure and flow is met, volume is smaller, and weight is more light better.It is existing can
Meet the suction pump of sampling pump traffic demand, it is typically all bigger for other field, volume and power consumption, hence it is evident that not meet
Portable, low energy consumption requirement, in addition in stationary source detection, the sampling pump required for the collection of soot dust granule thing is needed in 60L/
Sampling filter cylinder 60KP resistance is overcome under min flow.
Sampler uses carbon plate sliding vane rotary pump (being commonly called as scraper pump, the multiple blades of circle distribution) both at home and abroad at present, disclosure satisfy that
The scraper pump of air particle collection, its volume is big, and weight is big, and power consumption is big, and the scraper plate of scraper pump is made using carbon plate in addition
, carbon plate constantly friction in the process of running gives off a large amount of carbon dusts, and secondary pollution is caused to environment.Rear end mistake can only be passed through
Filter, periodic replacement, add cost and add the frequency of later maintenance by carbon dust collecting in the filter.
Also have in air granule sampler at present using membrane pump sampling, but gas caused by membrane pump compared with
Greatly, the collecting efficiency of particulate matter is influenceed.Reason is that the gyration band movable eccentric wheel of motor rotates, and eccentric wheel passes through connecting rod
Diaphragm of rubber piece is driven to move up and down, eccentric wheel for each revolution, once take out by diaphragm of rubber piece up and down motion a cycle, completion
Gas and an exhaust process.This kind of membrane pump is applied in the field of common intake-gas or liquid, will not go to pay close attention to air-flow
Pulsation, and in air particle collection field, sampling cutter uses aerodynamic principle, and gas will directly affect
The cutting efficiency of cutter, therefore, pulse pneumatic caused by membrane pump directly affects the collecting efficiency of particulate matter at present.To make
The pulsation for obtaining air-flow reduces, and has compressional characteristic based on air, and for membrane pump, improving rotating speed can effectively reduce
The gas of membrane pump, but be that diaphragm of rubber piece will overcome high frequency time to deflect for a long time the problem of bring simultaneously, and bring
Life problems.Existing membrane pump technology is difficult to ambient air particulate matter monitoring instrument field.
The content of the invention
The technical problems to be solved by the invention, which are membrane pumps, to be grouped as reducing gas adopting for air particle
And improve diaphragm life-span that rotating speed is brought it is low the problem of, and the membrane pump efficiency loss problem that valve block low-response is brought.
In order to solve the above-mentioned technical problem the present invention, discloses a kind of membrane pump, including housing, be arranged in housing every
Film suction structure component, the motor for driving the barrier film suction structure component, the pump head group for being arranged at the shell one end
Part, eccentric wheel is fixedly installed on the output shaft of the motor, and the barrier film suction structure component includes inclined with the eccentric wheel
The connecting rod of heart connection, the oscillating bearing being connected with the connecting rod, the round tablet being connected with oscillating bearing and annular barrier film
Piece, the inner ring side of the diaphragm is pressed by the tabletting to be fixed, and outer annular edge is fixed with the pump head component, the pump head component
Including pump head seat, it is arranged at the valve block seat of the pump head seat upper surface and is arranged on the pump head of the valve block seat upper surface
Lid, the outer annular edge of the diaphragm are clipped between the pump head seat and the valve block seat, the pump head seat and the valve block seat institute
The sealing space surrounded is pump head cavity, has inlet channel and exhaust passage in being covered on the pump head, the inlet channel with
Multiple breather check valves are provided between pump head cavity, it is unidirectional that multiple exhausts are provided between the exhaust passage and pump head cavity
Valve, the valve block of the breather check valve and exhaust check valve are bivalve membrane structure, including O-ring seal and are arranged on annular
Circular valve element inside sealing ring, the circular valve element are connected by two symmetrical connecting portions with the O-ring seal.
Further, the tabletting is metal material, and the ratio between the diameter of the tabletting and internal diameter of the pump head cavity are：
2∶3。
Further, the oscillating bearing includes an inner ring with spherical outside surface and an outer ring for having Internal Spherical Surface, institute
Stating tabletting center has downwardly projecting boss, and the boss center is provided with the installation for installing the oscillating bearing outer ring
Hole, the connecting rod are connected with the inner ring of the oscillating bearing.
Further, the remote position with connecting rod junction is installed with balancing weight on the eccentric wheel.
Further, the breather check valve and exhaust check valve are structure as a whole.
Based on a kind of above-mentioned membrane pump, the present invention proposes the membrane pump of another structure type, this barrier film simultaneously
Pump is bull pump, including housing, motor, the barrier film suction structure component being symmetricly set in the housing, is respectively arranged at institute
The pump head component at housing both ends is stated, eccentric wheel, the barrier film suction structure component are fixedly installed on the output shaft of the motor
Including the connecting rod being connected eccentric with the eccentric wheel, the oscillating bearing being connected with the connecting rod, the circle being connected with oscillating bearing
Tabletting and the diaphragm of annular, the inner ring side of the diaphragm is pressed by the tabletting to be fixed, outer annular edge and the diaphragm institute
Pump head component in side is fixed, and pump head component includes pump head seat, the valve block seat for being arranged at the pump head seat upper surface and set
Covered on the pump head of the valve block seat upper surface, the outer annular edge of diaphragm is clipped between the pump head seat and the valve block seat, institute
It is pump head cavity to state the sealing space that pump head seat and the valve block seat are surrounded, and has inlet channel and exhaust logical in being covered on pump head
Road, multiple breather check valves are provided between the inlet channel and pump head cavity, between the exhaust passage and pump head cavity
It is provided with multiple exhaust check valves, the valve block of the breather check valve and exhaust check valve is bivalve membrane structure, including annular
Sealing ring and the circular valve element being arranged on inside O-ring seal, the circular valve element pass through two symmetrical connecting portions and institute
O-ring seal connection is stated, the inlet channel covered respectively on two pump heads at housing both ends is connected, described two pump heads
The exhaust passage of upper lid is connected.
Beneficial effect using the invention described above technical scheme is：The membrane pump of the present invention, by inlet channel and pump
Head is provided with multiple breather check valves between inner chamber, and is provided with multiple exhausts unidirectionally between exhaust passage and pump head cavity
Valve, in the membrane pump course of work, as diaphragm of rubber piece continuously moves up and down, breather check valve replaces with exhaust check valve
Open and close, pressure in pump head cavity by breather check valve or exhaust check valve open pressure it is constant in the case of,
The quantity of check valve is more, and the pressure that each check valve is shared is smaller, and the valve block aperture in check valve responds speed with regard to smaller
Degree is faster, in addition, by being bivalve membrane structure by the valve block of breather check valve and exhaust check valve in the present invention, including ring
Shape sealing ring and the circular valve element being arranged on inside O-ring seal, the circular valve element by two symmetrical connecting portions with
The O-ring seal connection, in pump head cavity under pressure, circular valve element uniform stressed, when corresponding circular valve element is opened
Deformation quantity can also reduce, and further increase response speed, and the raising of response speed can effectively prevent membrane pump from pumping
Be converted to the moment of exhaust, exhaust check valve while opening, breather check valve be also not completely turned off and caused by gas leakage,
And then avoid loss due to pressure caused by gas leakage and flow and back draught causes airflow fluctuation, on the one hand by subtracting
The loss of few pressure and flow, the sampling flow of this membrane pump can be increased, make it meet air granule sampler to sampling
The requirement of flow, still further aspect reduce back draught and cause airflow fluctuation, so as to improve the stability of air-flow, be particularly suitable for use in
The collection of air particle, when solving existing membrane pump applied to air particle collection, because gas is unstable, and
The problem of influenceing particulate matter collecting efficiency.
Brief description of the drawings
Fig. 1 is a kind of structural representation of embodiment of membrane pump proposed by the invention；
Fig. 2 is a kind of structural representation of embodiment middle valve plate of membrane pump proposed by the invention；
Fig. 3 is the structural representation of another embodiment of membrane pump proposed by the invention；
Fig. 4 is the air inlet schematic diagram of breather check valve in embodiment one；
Fig. 5 is the structural representation of the valve block of breather check valve in embodiment one.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Embodiment one, the present embodiment propose a kind of membrane pump, as shown in figure 1, including housing 10, being arranged in housing 10
Barrier film suction structure component 20, the motor for driving the barrier film suction structure component, be arranged at described one end of housing 10
Pump head component 40, be fixedly installed eccentric wheel 50 on the output shaft 30 of the motor, the barrier film suction structure component 20 wraps
Include the connecting rod 201 being connected with the bias of eccentric wheel 50, the oscillating bearing 60 being connected with connecting rod 201, be connected with oscillating bearing 60
Round tablet 202 and annular diaphragm 203, the inner ring side of the diaphragm 203 presses fixation by the tabletting 202,
Outer annular edge is fixed with the pump head component 40, and the pump head component 40 includes pump head seat 401, is arranged on the pump head seat 401
The valve block seat 402 on surface and be arranged at lid 403 on the pump head of the upper surface of valve block seat 402, the diaphragm 203 it is outer
Ring side is clipped between the pump head seat 401 and the valve block seat 402, what the pump head seat 401 and the diaphragm 203 were surrounded
Sealing space is pump head cavity 401a, has inlet channel 403a and exhaust passage 403b on the pump head in lid 403, it is described enter
Multiple breather check valves 405 are provided between gas passage 403a and pump head cavity 401a, in the exhaust passage 403b and pump head
Multiple exhaust check valves 404 are provided between chamber 401a, as shown in Fig. 2 the breather check valve 405 and exhaust check valve 404
Valve block be valve structure, including O-ring seal 404a and the circular valve element that is arranged on inside O-ring seal 404a
404b, the circular valve element 404b are connected by two symmetrical connecting portion 404c with the O-ring seal 404a.This reality
The membrane pump of example is applied, by being provided with multiple breather check valves 405 between inlet channel 403a and pump head cavity 401a, and
Multiple exhaust check valves 404 are provided between exhaust passage 403b and pump head cavity 401a, in the membrane pump course of work, with
Diaphragm of rubber piece continuously to move up and down, breather check valve replaces opening and closing with exhaust check valve, in pump head cavity
Pressure by breather check valve or exhaust check valve open pressure it is constant in the case of, the quantity of check valve is more, Mei Gedan
The pressure shared to valve is smaller, and the valve block aperture in check valve is with regard to smaller, therefore response speed is faster, in addition, in the present invention
By being valve structure by the valve block of breather check valve and exhaust check valve, including O-ring seal and it is arranged on ring packing
Circular valve element inside circle, the circular valve element is connected by two symmetrical connecting portions with the O-ring seal, in pump
In head inner chamber under pressure, circular valve element uniform stressed, deformation quantity when corresponding circular valve element is opened can also reduce, such as Fig. 4 institutes
Show, A1, A2 are respectively the bivalve film of the valve block of breather check valve, and B1, B2 are respectively the bivalve film of the valve block of exhaust check valve, are entered
One step improves response speed, and the raising of response speed can effectively prevent membrane pump being converted to the moment of exhaust from pumping,
Exhaust check valve open while, breather check valve be also not completely turned off and caused by gas leakage, avoid because gas leakage is made
Into pressure and the loss of flow and back draught cause airflow fluctuation.On the one hand by reducing the loss of pressure and flow,
The sampling flow of this membrane pump can be increased, it is met requirement of the air granule sampler to sampling flow, in addition a side
Face reduces back draught and causes airflow fluctuation, so as to improve the stability of air-flow, the collection for the air particle that is particularly suitable for use in, and solution
When existing membrane pump of having determined is applied to air particle collection, because gas is unstable, and particulate matter collecting efficiency is influenceed
The problem of.
In order to facilitate the making of check valve, the valve block of the breather check valve 405 and exhaust check valve 404 is integral type knot
Structure.
When multiple breather check valves 405 or multiple exhaust check valves 404, as shown in figure 5, the valve block of each check valve with
The valve block of each exhaust check valve is preferably integral structure, facilitates the making of check valve.
Furthermore, it is necessary to explanation, for single head pump, pulse pneumatic frequency is consistent with the rotational frequency of motor, frequency
Rate is higher, and the pulsation period is smaller, and air-flow more tends to be steady closer to continuously.The membrane pump of the present embodiment is unidirectional by improving
The response speed of valve, corresponding motor rotation frequency are provided with the space of raising, and the output shaft 30 of motor is improved by controlling
Rotational frequency, it can further reduce pulse pneumatic.
In the present embodiment, preferably described tabletting is metal material, and the diameter of the tabletting is interior with the pump head cavity
The ratio between footpath is 2: 3, and the diaphragm 203 of quality of rubber materials is softer to be easily deformed, and connecting rod 201 promotes tabletting 202 (equivalent to piston) fortune
It is dynamic, pump head cavity 401a volume is changed, so as to produce pressure, force the valve block of check valve to act, membrane pump pumping
Or compression when load be certain, tabletting area is smaller, and 203 deformable area of diaphragm will be bigger, accordingly to every
The pulling force of diaphragm 203 is with regard to smaller, because diaphragm 203 once leaks air, membrane pump namely scraps, existing membrane pump in order to
Improve service life, the general area for reducing tabletting 202 as far as possible, the area of increase diaphragm 203, to reduce to diaphragm 203
Abrasion.It is bigger in the deformation of pressure load lower diaphragm plate piece 203 but the problem of so existing is, so it may result in every time
When pumping or compression, actual pump head cavity 401a Volume Changes diminish, namely the rate of air sucked in required of membrane pump and load capacity are all
There is loss, the requirement to sampling flow in air particle collector can not be met, therefore, the membrane pump of the present embodiment passes through increasing
The area of big tabletting 202, the volume change increase of pump head cavity 401a caused by the displacement that tabletting 202 is moved, takes out accordingly
Gas and capacity will increase, therefore can thus to draw because of deformation of the diaphragm of rubber piece under load forces
The loss risen is preferably minimized, and then improves the sampling flow of membrane pump, makes it meet air granule sampler to sampling flow
Requirement.
In the present embodiment by increase tabletting 202 area, reduce diaphragm 203 area can increase adopting for membrane pump
Sample flow, but the problem of other is brought simultaneously：The diameter of tabletting 202 is bigger, in the presence of connecting rod 201, tabletting 202
Swing is bigger, and diaphragm 203 accordingly increases in the pulling force that the both sides of the swinging plane position of connecting rod 201 are born, and can not ensure barrier film
The service life of pump, connecting rod 201 described in the present embodiment is connected by oscillating bearing 60 with the tabletting 202 of circle, such as Fig. 1 institutes
Show, oscillating bearing 60 includes an inner ring 601 with spherical outside surface and an outer ring 602 for having Internal Spherical Surface, in the tabletting 202
The heart has downwardly projecting boss, and the boss center is provided with the mounting hole for installing the oscillating bearing outer ring 602, described
Connecting rod 201 is connected with the inner ring 601 of the oscillating bearing 60.By being mounted with oscillating bearing between tabletting 202 and connecting rod 201
601, it is exactly the swing for reducing tabletting 202 that it, which is acted on, reduces deflecting for the both sides of diaphragm 203, and then reduce the mill of diaphragm 203
Damage, extends its service life.
Eccentric wheel 50 can produce significant shock and noise in high-speed rotation, be applied due to being sampled in air particle
It is in field, it is necessary to sampling pump installation site is higher, if sampling pump produced in the higher position of a center of gravity vibrations it is larger if,
There will be great potential safety hazard, it is necessary to inspect periodically, increase human cost, the membrane pump in the present embodiment pass through it is described partially
The remote position with connecting rod junction is installed with balancing weight 70 on heart wheel 50, makes the rotation of eccentric wheel 50 more steady, so as to subtract
The vibrations of the small pump housing and noise, while the service life of transmission parts bearing can be improved.
Embodiment two, based on a kind of membrane pump in embodiment one, the present embodiment proposes another membrane pump, this every
Membrane pump is bull pump, as shown in figure 3, including housing 10, motor output shaft 30, the barrier film suction being symmetricly set in the housing
Construction package 20, the pump head component 40 at the both ends of housing 10 is respectively arranged at, is fixedly installed on the output shaft of the motor 30
There is eccentric wheel 50, by taking the barrier film suction structure component 20 of wherein side as an example, the barrier film suction structure component 20 includes and institute
State the connecting rod 201, the oscillating bearing 60 being connected with the connecting rod 201, the circle being connected with oscillating bearing 60 of the eccentric connection of eccentric wheel
Shape tabletting 202 and the diaphragm 203 of annular, the inner ring side of the diaphragm 203 presses fixation, outer shroud by the tabletting 202
The pump head component 40 on side and the place side of diaphragm 203 is fixed, and pump head component 40 includes pump head seat 401, is arranged at the pump head
Seat 401 upper surfaces valve block seat 402 and be arranged at lid 403 on the pump head of the upper surface of valve block seat 402, diaphragm 203
Outer annular edge is clipped between the pump head seat 401 and the valve block seat 402, and the pump head seat 401 and the valve block seat 402 are surrounded
Sealing space be pump head cavity 401a, there is inlet channel 403a and exhaust passage 403b, the air inlet in lid 403 on pump head
Multiple breather check valves 405, the exhaust passage 403b and pump head cavity are provided between passage 403a and pump head cavity 401a
Multiple exhaust check valves 404 are provided between 401a, as shown in Fig. 2 the breather check valve 405 and exhaust check valve 404
Valve block is valve structure, including the O-ring seal 404a and circular valve element 404b that is arranged on inside O-ring seal 404a,
The circular valve element 404b is connected by two symmetrical connecting portion 404c with the O-ring seal 404a.It is located at shell respectively
The inlet channel covered on two pump heads at body both ends is connected, and the exhaust passage covered on described two pump heads is connected.In barrier film
During pump work, as diaphragm of rubber piece continuously moves up and down, breather check valve replaces with exhaust check valve beats on and off
Close, the pressure in pump head cavity by breather check valve or exhaust check valve open pressure it is constant in the case of, check valve
Quantity is more, and the pressure that each check valve is shared is smaller, and the valve block aperture in check valve is with regard to smaller, therefore response speed is got over
It hurry up, in addition, by being valve structure by the valve block of breather check valve and exhaust check valve in the present invention, including O-ring seal
With the circular valve element being arranged on inside O-ring seal, the circular valve element passes through two symmetrical connecting portions and the annular
Sealing ring is connected, and in pump head cavity under pressure caused by Volume Changes, circular valve element uniform stressed, corresponding circular valve element is beaten
Deformation quantity when holding can also reduce, and further increase response speed, and the raising of response speed effectively can prevent membrane pump from existing
The moment of exhaust is converted to from pumping, while opening, breather check valve is also not completely turned off and caused exhaust check valve
Gas leakage, avoid the loss due to pressure caused by gas leakage and flow and back draught cause airflow fluctuation.On the one hand it is logical
The loss for reducing pressure and flow is crossed, the sampling flow of this membrane pump can be increased, it is met air granule sampler pair
The requirement of sampling flow, still further aspect reduces back draught and causes airflow fluctuation, especially suitable so as to improve the stability of air-flow
For the collection of air particle, when solving existing membrane pump applied to air particle collection, because gas is unstable
The problem of determining, and influenceing particulate matter collecting efficiency.
In addition, the membrane pump of the present embodiment is by using double end pump configuration, the operation of 180 degree phase alternation makes two pump heads
Pumping and exhaust process are interlocked, a pump head pumping in the course of work, the exhaust of another pump head, interleaved operation, compensatory pause, also
It can play a part of further reducing gas, be particularly suitable for use in air granule sampler.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (6)
1. a kind of membrane pump, including housing, be arranged in housing barrier film suction structure component, for driving the barrier film to aspirate
The motor of construction package, the pump head component for being arranged at the shell one end, bias is fixedly installed on the output shaft of the motor
Wheel, the joint shaft that the barrier film suction structure component includes the connecting rod being connected eccentric with the eccentric wheel, is connected with the connecting rod
The round tablet and the diaphragm of annular hold, being connected with oscillating bearing, the inner ring side of the diaphragm is pressed by the tabletting
Fixed, outer annular edge is fixed with the pump head component, it is characterised in that the pump head component includes pump head seat, is arranged at the pump
The valve block seat of headstock upper surface and being arranged on the pump head of the valve block seat upper surface covers, the outer annular edge folder of the diaphragm
Between the pump head seat and the valve block seat, the sealing space that the pump head seat and the valve block seat are surrounded is in pump head
Chamber, there is inlet channel and exhaust passage in covering on the pump head, be provided between the inlet channel and pump head cavity multiple
Breather check valve, multiple exhaust check valves, the breather check valve and row are provided between the exhaust passage and pump head cavity
The valve block of gas check valve is bivalve membrane structure, including O-ring seal and the circular valve element that is arranged on inside O-ring seal,
The circular valve element is connected by two symmetrical connecting portions with the O-ring seal, and the oscillating bearing includes a tool
The inner ring and an outer ring for having Internal Spherical Surface, the tabletting center for having spherical outside surface have a downwardly projecting boss, in the boss
The heart is provided with the mounting hole for installing the oscillating bearing outer ring, and the connecting rod is connected with the inner ring of the oscillating bearing, described
Tabletting is metal material, and the ratio between the diameter of the tabletting and internal diameter of the pump head cavity are：2∶3.
2. membrane pump according to claim 1, it is characterised in that the remote position with connecting rod junction on the eccentric wheel
Put and be installed with balancing weight.
3. membrane pump according to claim 1, it is characterised in that the breather check valve and exhaust check valve are integrated knot
Structure.
4. a kind of membrane pump, the membrane pump is bull pump, including housing, motor, the barrier film being symmetricly set in the housing
Suction structure component, the pump head component at the housing both ends is respectively arranged at, is fixedly installed on the output shaft of the motor partially
Heart wheel, the joint that the barrier film suction structure component includes the connecting rod being connected eccentric with the eccentric wheel, is connected with the connecting rod
The diaphragm of bearing, the round tablet being connected with oscillating bearing and annular, the inner ring side of the diaphragm is by the tabletting pressure
Close and fix, outer annular edge and the pump head component of side where the diaphragm are fixed, it is characterised in that pump head component includes pump head seat, set
It is placed in the valve block seat of the pump head seat upper surface and is arranged on the pump head of the valve block seat upper surface and cover, outside diaphragm
Ring side is clipped between the pump head seat and the valve block seat, and the sealing space that the pump head seat and the valve block seat are surrounded is pump
Head inner chamber, has inlet channel and exhaust passage in covering on pump head, is provided between the inlet channel and pump head cavity multiple
Breather check valve, multiple exhaust check valves, the breather check valve and row are provided between the exhaust passage and pump head cavity
The valve block of gas check valve is bivalve membrane structure, including O-ring seal and the circular valve element that is arranged on inside O-ring seal,
The circular valve element is connected by two symmetrical connecting portions with the O-ring seal, respectively positioned at two of housing both ends
The inlet channel covered on pump head is connected, and the exhaust passage covered on described two pump heads is connected, and the oscillating bearing includes one
Individual inner ring and an outer ring for having Internal Spherical Surface with spherical outside surface, the tabletting center has downwardly projecting boss, described convex
Platform center is provided with the mounting hole for installing the oscillating bearing outer ring, and the connecting rod is connected with the inner ring of the oscillating bearing,
The tabletting is metal material, and the ratio between the diameter of the tabletting and internal diameter of the pump head cavity are：2∶3.
5. membrane pump according to claim 4, it is characterised in that the remote position with connecting rod junction on the eccentric wheel
Put and be installed with balancing weight.
6. membrane pump according to claim 4, it is characterised in that the breather check valve and exhaust check valve are integrated knot
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510115605.XA CN104791228B (en) | 2015-03-10 | 2015-03-10 | A kind of membrane pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510115605.XA CN104791228B (en) | 2015-03-10 | 2015-03-10 | A kind of membrane pump |
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| Publication Number | Publication Date |
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| CN104791228A CN104791228A (en) | 2015-07-22 |
| CN104791228B true CN104791228B (en) | 2017-11-14 |
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| CN201510115605.XA Active CN104791228B (en) | 2015-03-10 | 2015-03-10 | A kind of membrane pump |
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| CN108172105A (en) * | 2018-02-26 | 2018-06-15 | 何茹清 | A kind of diaphragm pump operation principle demonstration teaching aid |
| GB201912057D0 (en) * | 2019-08-22 | 2019-10-09 | Ge Healthcare Bio Sciences Ab | A diaphragm pump |
| CN112483368B (en) * | 2019-09-11 | 2024-04-16 | 厦门科际精密器材有限公司 | Diaphragm pump |
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| DE4118652A1 (en) * | 1991-02-02 | 1992-08-06 | Knf Neuberger Gmbh | Diaphragm pump unit - has valves which open through movement of valve plate edges |
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| CN203201768U (en) * | 2013-04-28 | 2013-09-18 | 刘子良 | Composite pump with diaphragm and piston |
| CN203809256U (en) * | 2014-03-01 | 2014-09-03 | 何志荣 | Single-throw coaxial double-connecting-rod diaphragm pump |
| CN203939676U (en) * | 2014-07-01 | 2014-11-12 | 陈庆东 | A kind of diaphragm pump |
| CN204572404U (en) * | 2015-03-10 | 2015-08-19 | 李新华 | A kind of diaphragm pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000186672A (en) * | 1998-12-22 | 2000-07-04 | Fujikura Rubber Ltd | Valve structure and electromagnetic diaphragm pump using it |
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2015
- 2015-03-10 CN CN201510115605.XA patent/CN104791228B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181477A (en) * | 1978-03-02 | 1980-01-01 | Pace Incorporated | Pump valve |
| DE4118652A1 (en) * | 1991-02-02 | 1992-08-06 | Knf Neuberger Gmbh | Diaphragm pump unit - has valves which open through movement of valve plate edges |
| CN201212464Y (en) * | 2008-06-11 | 2009-03-25 | 张扬 | Diaphragm pump |
| CN203201768U (en) * | 2013-04-28 | 2013-09-18 | 刘子良 | Composite pump with diaphragm and piston |
| CN203809256U (en) * | 2014-03-01 | 2014-09-03 | 何志荣 | Single-throw coaxial double-connecting-rod diaphragm pump |
| CN203939676U (en) * | 2014-07-01 | 2014-11-12 | 陈庆东 | A kind of diaphragm pump |
| CN204572404U (en) * | 2015-03-10 | 2015-08-19 | 李新华 | A kind of diaphragm pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104791228A (en) | 2015-07-22 |
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