CN104791228A - Diaphragm pump - Google Patents

Diaphragm pump Download PDF

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Publication number
CN104791228A
CN104791228A CN201510115605.XA CN201510115605A CN104791228A CN 104791228 A CN104791228 A CN 104791228A CN 201510115605 A CN201510115605 A CN 201510115605A CN 104791228 A CN104791228 A CN 104791228A
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CN
China
Prior art keywords
pump head
diaphragm
pump
check valve
ring
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CN201510115605.XA
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Chinese (zh)
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CN104791228B (en
Inventor
李新华
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李新华
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Priority to CN201510115605.XA priority Critical patent/CN104791228B/en
Publication of CN104791228A publication Critical patent/CN104791228A/en
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Publication of CN104791228B publication Critical patent/CN104791228B/en

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Abstract

The invention provides a diaphragm pump which comprises a case, a diaphragm pumping structure assembly, a motor and a pump head assembly. An eccentric wheel is fixedly arranged on an output shaft of the motor. The diaphragm pumping structure assembly comprises a connecting rod, a knuckle bearing connected with the connecting rod, a round pressing piece connected with the knuckle bearing, and an annular diaphragm piece. An inner ring edge of the diaphragm piece is pressed and fixed by the pressing piece. The outer ring edge is fixed to the pump head assembly. The pump head assembly comprises a pump head base, a valve plate base and a pump head upper cover. A plurality of air inlet one-way valves are arranged between an air inlet channel and an inner cavity of a pump head. A plurality of exhaust one-way valves are arranged between an exhaust channel and the inner cavity of the pump head. A valve plate of each air inlet one-way valve and a valve plate of each exhaust one-way valve comprise annular sealing rings and round valve elements arranged in the annular sealing rings. The round valve elements are connected with the annular sealing rings through two symmetrical connecting parts. The diaphragm pump is long in service life, large in exhaust negative pressure and particularly suitable for collecting air particular matter.

Description

A kind of diaphragm pump
Technical field
The present invention relates to a kind of diaphragm pump, be specifically related to a kind of air particle collection diaphragm pump.
Background technique
The particulate solid of a large amount of different-grain diameter is left floating in ambient air, in the Concentration Testing to environmental airborne particle thing, PM2.5 (particle diameter is at the particulate matter being less than or equal to 2.5 microns) is isolated in the particulate matter of sampler different quality and particle diameter from air, again the air containing PM2.5 is passed through filter membrane with certain flow rate, gather the specific time, PM2.5 filters on filter membrane, again filter membrane is weighed, remove the background weight of filter membrane, the ratio of the weight increased and the total volume of collection obtains the particle concentration contained in the air of per unit volume, Evaluation Environment air quality is carried out with this.Sampler utilizes aerodynamic principle; in sampling process; the air-flow velocity of sampling has particular requirement; it is consistent that PM2.5 sampling cutter and EPA (U.S. Environmental Protection Agency) emission standard that NBS " HJ656-2013 ambient air particulate matter PM2.5 manual monitoring method (weighting method) technical specification " requires require, the sampling flow that sampler is corresponding be all (1m/h) 16.7L/min and require airflow fluctuation be not more than ± 2%.Sampling duration is sample every day 24 hours.Simultaneously, the air-flow of sampling needs the resistance overcoming filter membrane, the sampling membrane of standard-required adopts glass fibre material or the making of teflon material, wherein the filter membrane chemical property of teflon material is comparatively stable is usually used in Sources field, but teflon membrane filter ventilating performance is poor, under the flow velocity of 16.7L/min, resistance is larger, vapour lock can reach about 30KP, and along with gather particulate matter more, its resistance constantly rises, this just requires higher to the load capacity of bleeding of sampling pump, and, for in portable air particulate matter detecting instrument, for instrument can be made more portable, extraction pump is under the prerequisite meeting main pressure and flow, volume is less, weight is more light better.The existing suction pump that can meet sampling pump traffic demand, general is all for other field, volume and power consumption are all larger, obviously do not meet portable, low energy consumption requirement, in addition in stationary source detects, the sampling pump required for the collection of soot dust granule thing needs the resistance overcoming sampling filter cylinder 60KP under the flow of 60L/min.
The multiplex carbon plate sliding vane rotary pump of sampler (is commonly called as scraper pump both at home and abroad at present, the multiple blade of circle distribution), the scraper pump that air particle gathers can be met, its volume is large, weight is large, and power consumption is large, and the scraper plate of scraper pump adopts carbon plate to make in addition, in running, carbon plate constantly rubs and gives off a large amount of carbon dust, causes secondary pollution to environment.Can only be filtered by rear end, by carbon dust collecting in the filter, periodic replacement, adds cost and adds the frequency of later maintenance.
Also have in current air granule sampler and adopt diaphragm pump to sample, but the gas that diaphragm pump produces is comparatively large, affects the collecting efficiency of particulate matter.Reason is that the rotation motion band movable eccentric wheel of drive motor rotates, and eccentric wheel drives diaphragm of rubber sheet to move up and down by connecting rod, and eccentric wheel often revolves and turns around, and diaphragm of rubber sheet moves up and down one-period, completes and once bleeds and an exhaust process.This kind of diaphragm pump is applied in the field of common intake-gas or liquid, can not go to pay close attention to gas, and in air particle collection field, sampling cutter adopts aerodynamic principle, gas will directly affect the cutting efficiency of cutter, therefore, the pulse pneumatic that current diaphragm pump produces directly affects the collecting efficiency of particulate matter.Reduce for making the pulsation of air-flow, based on the compressional characteristic of air tool, for diaphragm pump, improve the gas that rotating speed can effectively reduce diaphragm pump, but the problem simultaneously brought is diaphragm of rubber sheet will be overcome high frequency time and deflect for a long time, and the life problems brought.Existing diaphragm pump technology is difficult to ambient air particulate matter monitoring instrument field.
Summary of the invention
To be diaphragm pump in for air particle collection improve diaphragm life-span that rotating speed brings low problem for reducing gas to technical problem to be solved by this invention, and the diaphragm pump efficiency loss problem that valve block low-response brings.
The present invention is in order to solve the problems of the technologies described above, disclose a kind of diaphragm pump, comprise housing, be arranged at the barrier film suction structure assembly in housing, for driving the motor of described barrier film suction structure assembly, be arranged at the pump head component of described shell one end, the output shaft of described motor is fixedly installed eccentric wheel, described barrier film suction structure assembly comprises the connecting rod be connected with described eccentric wheel bias, the joint shaft bearing be connected with described connecting rod, the round tablet be connected with joint shaft bearing, and the diaphragm of annular, the inner ring limit of described diaphragm is fixed by described compressing tablet pressing, outer annular edge and described pump head component are fixed, described pump head component comprises pump head seat, be arranged at the valve block seat of described pump head seat upper surface, and be arranged at the pump head upper cover of described valve block seat upper surface, the outer annular edge of described diaphragm is clipped between described pump head seat and described valve block seat, the seal space that described pump head seat and described valve block seat surround is pump head cavity, in described pump head upper cover, there is gas-entered passageway and exhaust passage, multiple breather check valve is provided with between described gas-entered passageway and pump head cavity, multiple exhaust check valve is provided with between described exhaust passage and pump head cavity, the valve block of described breather check valve and exhaust check valve is bivalve membrane structure, comprise O-ring seal and be arranged on the circular spool of O-ring seal inside, described circular spool is connected with described O-ring seal by two symmetrical joints.
Further, described compressing tablet is metal material, and the diameter of described compressing tablet with the ratio of the internal diameter of described pump head cavity is: 2: 3.
Further, described joint shaft bearing comprises the outer ring that an inner ring with outer spherical surface and have inner ball surface, described compressing tablet center has the boss protruded downwards, described boss center has the mounting hole for installing described joint shaft bearing outer ring, and described connecting rod is connected with the inner ring of described joint shaft bearing.
Further, described eccentric wheel is installed with balancing weight away from the position with connecting rod joint.
Further, described breather check valve and exhaust check valve are structure as a whole.
Based on above-mentioned a kind of diaphragm pump, the present invention proposes the diaphragm pump of another structural type simultaneously, this diaphragm pump is bull pump, comprise housing, motor, be symmetricly set on the barrier film suction structure assembly in described housing, be arranged at the pump head component at described housing two ends respectively, the output shaft of described motor is fixedly installed eccentric wheel, described barrier film suction structure assembly comprises the connecting rod be connected with described eccentric wheel bias, the joint shaft bearing be connected with described connecting rod, the round tablet be connected with joint shaft bearing, and the diaphragm of annular, the inner ring limit of described diaphragm is fixed by described compressing tablet pressing, the pump head component of outer annular edge and this side, diaphragm place is fixed, pump head component comprises pump head seat, be arranged at the valve block seat of described pump head seat upper surface, and be arranged at the pump head upper cover of described valve block seat upper surface, the outer annular edge of diaphragm is clipped between described pump head seat and described valve block seat, the seal space that described pump head seat and described valve block seat surround is pump head cavity, there is in pump head upper cover gas-entered passageway and exhaust passage, multiple breather check valve is provided with between described gas-entered passageway and pump head cavity, multiple exhaust check valve is provided with between described exhaust passage and pump head cavity, the valve block of described breather check valve and exhaust check valve is bivalve membrane structure, comprise O-ring seal and be arranged on the circular spool of O-ring seal inside, described circular spool is connected with described O-ring seal by two symmetrical joints, the gas-entered passageway laying respectively at two pump head upper covers at housing two ends is connected, the exhaust passage of described two pump head upper covers is connected.
The beneficial effect of employing the invention described above technological scheme is: diaphragm pump of the present invention, by being provided with multiple breather check valve between gas-entered passageway and pump head cavity, and between exhaust passage and pump head cavity, be provided with multiple exhaust check valve, in diaphragm pump working procedure, along with diaphragm of rubber sheet continuous print moves up and down, breather check valve and exhaust check valve alternately open and close, breather check valve or exhaust check valve are opened constant pressure by the pressure in pump head cavity, the quantity of one-way valve is more, the pressure that each one-way valve is shared is less, valve block aperture in one-way valve is less, therefore speed of response is faster, in addition, by the valve block of breather check valve and exhaust check valve is bivalve membrane structure in the present invention, comprise O-ring seal and be arranged on the circular spool of O-ring seal inside, described circular spool is connected with described O-ring seal by two symmetrical joints, in pump head cavity under pressure, circular spool uniform stressed, deformation quantity when corresponding circular spool is opened also can reduce, further increase speed of response, the raising of speed of response can effectively prevent diaphragm pump in the moment being converted to exhaust from bleeding, exhaust check valve is while opening, the gas leakage that breather check valve is not also closed completely and caused, and then avoid because the loss of the leak gas pressure that causes and flow and back draught cause airflow fluctuation, on the one hand by reducing the loss of pressure and flow, the sampling flow of this diaphragm pump can be increased, it is made to meet the requirement of air granule sampler to sampling flow, reduce back draught in addition on the one hand and cause airflow fluctuation, thus improve the stability of air-flow, be particularly useful for the collection of air particle, solve existing diaphragm pump be applied to air particle gather time, because gas is unstable, and affect the problem of particulate matter collecting efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of diaphragm pump proposed by the invention;
Fig. 2 is the structural representation of a kind of embodiment's middle valve plate of diaphragm pump proposed by the invention;
Fig. 3 is the structural representation of another embodiment of diaphragm pump proposed by the invention.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment one, the present embodiment proposes a kind of diaphragm pump, as shown in Figure 1, comprise housing 10, be arranged at the barrier film suction structure assembly 20 in housing 10, for driving the motor of described barrier film suction structure assembly, be arranged at the pump head component 40 of described housing 10 one end, the output shaft 30 of described motor is fixedly installed eccentric wheel 50, described barrier film suction structure assembly 20 comprises the connecting rod 201 be connected with described eccentric wheel 50 bias, the joint shaft bearing 60 be connected with connecting rod 201, the round tablet 202 be connected with joint shaft bearing 60, and the diaphragm 203 of annular, the inner ring limit of described diaphragm 203 is fixed by the pressing of described compressing tablet 202, outer annular edge and described pump head component 40 are fixed, described pump head component 40 comprises pump head seat 401, be arranged at the valve block seat 402 of described pump head seat 401 upper surface, and be arranged at the pump head upper cover 403 of described valve block seat 402 upper surface, the outer annular edge of described diaphragm 203 is clipped between described pump head seat 401 and described valve block seat 402, the seal space that described pump head seat 401 and described diaphragm 203 surround is pump head cavity 401a, there is in described pump head upper cover 403 gas-entered passageway 403a and exhaust passage 403b, multiple breather check valve 404 is provided with between described gas-entered passageway 403a and pump head cavity 401a, multiple exhaust check valve 405 is provided with between described exhaust passage 403b and pump head cavity 401a, as shown in Figure 2, the valve block of described breather check valve 404 and exhaust check valve 405 is valve structure, comprise O-ring seal 404a and the circular spool 404b being arranged on O-ring seal 404a inside, described circular spool 404b is connected with described O-ring seal 404a by two symmetrical joint 404c.The diaphragm pump of the present embodiment, by being provided with multiple breather check valve 404 between gas-entered passageway 403a and pump head cavity 401a, and between exhaust passage 403b and pump head cavity 401a, be provided with multiple exhaust check valve 405, in diaphragm pump working procedure, along with diaphragm of rubber sheet continuous print moves up and down, breather check valve and exhaust check valve alternately open and close, breather check valve or exhaust check valve are opened constant pressure by the pressure in pump head cavity, the quantity of one-way valve is more, the pressure that each one-way valve is shared is less, valve block aperture in one-way valve is less, therefore speed of response is faster, in addition, by the valve block of breather check valve and exhaust check valve is valve structure in the present invention, comprise O-ring seal and be arranged on the circular spool of O-ring seal inside, described circular spool is connected with described O-ring seal by two symmetrical joints, in pump head cavity under pressure, circular spool uniform stressed, deformation quantity when corresponding circular spool is opened also can reduce, as shown in Figure 4, A1, A2 is respectively the bivalve film of the valve block of breather check valve, B1, B2 is respectively the bivalve film of the valve block of exhaust check valve, further increase speed of response, the raising of speed of response can effectively prevent diaphragm pump in the moment being converted to exhaust from bleeding, exhaust check valve is while opening, the gas leakage that breather check valve is not also closed completely and caused, the loss and the back draught that avoid pressure and the flow caused owing to leaking gas cause airflow fluctuation.On the one hand by reducing the loss of pressure and flow, the sampling flow of this diaphragm pump can be increased, it is made to meet the requirement of air granule sampler to sampling flow, reduce back draught in addition on the one hand and cause airflow fluctuation, thus improve the stability of air-flow, be particularly useful for the collection of air particle, solve existing diaphragm pump and be applied to air particle when gathering, because gas is unstable, and affect the problem of particulate matter collecting efficiency.
The conveniently making of one-way valve, the valve block of described breather check valve 404 and exhaust check valve 405 is integral type structure.
When multiple breather check valves 404 or multiple exhaust check valve 405, as shown in Figure 5, the valve block of each one-way valve and the valve block of each exhaust check valve are preferably integral structure, facilitate the making of one-way valve.
In addition, it should be noted that, for single head pump, pulse pneumatic frequency is consistent with the rotational frequency of motor, and frequency is higher, and the pulsation period is less, and air-flow is continuously more close, more tends to be steady.The diaphragm pump of the present embodiment is by improve the speed of response of one-way valve, and corresponding motor rotation frequency is provided with the space of raising, by controlling the rotational frequency of the output shaft 30 improving motor, can reduce pulse pneumatic further.
In the present embodiment, preferred described compressing tablet is metal material, the diameter of described compressing tablet is 2: 3 with the ratio of the internal diameter of described pump head cavity, the softer easy distortion of diaphragm 203 of quality of rubber materials, connecting rod 201 promotes compressing tablet 202 (being equivalent to piston) motion, the volume of pump head cavity 401a is changed, thus generation pressure, force the valve block action of one-way valve, load when diaphragm pump is bled or compresses is certain, compressing tablet area is less, the deformable area of diaphragm 203 will be larger, corresponding less to the pulling force of diaphragm 203, due to diaphragm 203 once leak air, namely diaphragm pump is also scrapped, existing diaphragm pump is in order to improve working life, the general area as far as possible reducing compressing tablet 202, increase the area of diaphragm 203, to reduce the wearing and tearing to diaphragm 203.But, such Problems existing is, larger in the distortion of pressure load lower diaphragm plate sheet 203, when will cause like this bleeding at every turn or compressing, the Volume Changes of actual pump head cavity 401a diminishes, namely also the rate of air sucked in required of diaphragm pump and load capacity have loss, the requirement to sampling flow in air particle collector cannot be met, therefore, the diaphragm pump of the present embodiment is by increasing the area of compressing tablet 202, the volume change of the pump head cavity 401a that the displacement that compressing tablet 202 moves produces increases, to bleed accordingly and air displacement will increase, therefore the loss caused because of the distortion of diaphragm of rubber sheet under load forces just can be made like this to drop to minimum, and then improve the sampling flow of diaphragm pump, it is made to meet the requirement of air granule sampler to sampling flow.
By increasing the area of compressing tablet 202 in the present embodiment, the area reducing diaphragm 203 can increase the sampling flow of diaphragm pump, but bring other problem: the diameter of compressing tablet 202 is larger simultaneously, under the effect of connecting rod 201, the swing of compressing tablet 202 is larger, the corresponding increase of pulling force that diaphragm 203 bears in the both sides of connecting rod 201 swinging plane position, the working life of diaphragm pump cannot be ensured, connecting rod 201 described in the present embodiment is connected with circular compressing tablet 202 by joint shaft bearing 60, as shown in Figure 1, joint shaft bearing 60 comprises the outer ring 602 that an inner ring 601 with outer spherical surface and have inner ball surface, described compressing tablet 202 center has the boss protruded downwards, described boss center has the mounting hole for installing described joint shaft bearing outer ring 602, described connecting rod 201 is connected with the inner ring 601 of described joint shaft bearing 60.By having installed joint shaft bearing 601 between compressing tablet 202 and connecting rod 201, its effect has been exactly the swing reducing compressing tablet 202, reduces deflecting of diaphragm 203 both sides, and then reduces the wearing and tearing of diaphragm 203, extends its working life.
Eccentric wheel 50 can produce comparatively big bang and noise in high-speed rotation, due in air particle sampling application, need higher for sampling pump mounting point, if sampling pump produces the larger words of vibrations in the position that center of gravity is higher, great potential safety hazard will be there is, needs are made regular check on, increase human cost, diaphragm pump in the present embodiment by being installed with balancing weight 70 away from the position with connecting rod joint on described eccentric wheel 50, make the rotation of eccentric wheel 50 more steady, thus reduce vibrations and the noise of the pump housing, the working life of transmission part bearing can be improved simultaneously.
Embodiment two, based on a kind of diaphragm pump in embodiment one, the present embodiment proposes another diaphragm pump, this diaphragm pump is bull pump, as shown in Figure 3, comprise housing 10, motor output shaft 30, be symmetricly set on the barrier film suction structure assembly 20 in described housing, be arranged at the pump head component 40 at described housing 10 two ends respectively, the output shaft of described motor 30 is fixedly installed eccentric wheel 50, for the barrier film suction structure assembly 20 of wherein side, described barrier film suction structure assembly 20 comprises the connecting rod 201 be connected with described eccentric wheel bias, the joint shaft bearing 60 be connected with described connecting rod 201, the round tablet 202 be connected with joint shaft bearing 60, and the diaphragm 203 of annular, the inner ring limit of described diaphragm 203 is fixed by the pressing of described compressing tablet 202, the pump head component 40 of outer annular edge and side, this diaphragm 203 place is fixed, pump head component 40 comprises pump head seat 401, be arranged at the valve block seat 402 of described pump head seat 401 upper surface, and be arranged at the pump head upper cover 403 of described valve block seat 402 upper surface, the outer annular edge of diaphragm 203 is clipped between described pump head seat 401 and described valve block seat 402, the seal space that described pump head seat 401 and described valve block seat 402 surround is pump head cavity 401a, there is in pump head upper cover 403 gas-entered passageway 403a and exhaust passage 403b, multiple breather check valve 404 is provided with between described gas-entered passageway 403a and pump head cavity 401a, multiple exhaust check valve 405 is provided with between described exhaust passage 403b and pump head cavity 401a, as shown in Figure 2, the valve block of described breather check valve 404 and exhaust check valve 405 is valve structure, comprise O-ring seal 404a and the circular spool 404b being arranged on O-ring seal 404a inside, described circular spool 404b is connected with described O-ring seal 404a by two symmetrical joint 404c.The gas-entered passageway laying respectively at two pump head upper covers at housing two ends is connected, and the exhaust passage of described two pump head upper covers is connected.In diaphragm pump working procedure, along with diaphragm of rubber sheet continuous print moves up and down, breather check valve and exhaust check valve alternately open and close, breather check valve or exhaust check valve are opened constant pressure by the pressure in pump head cavity, the quantity of one-way valve is more, the pressure that each one-way valve is shared is less, valve block aperture in one-way valve is less, therefore speed of response is faster, in addition, by the valve block of breather check valve and exhaust check valve is valve structure in the present invention, comprise O-ring seal and be arranged on the circular spool of O-ring seal inside, described circular spool is connected with described O-ring seal by two symmetrical joints, under the pressure that Volume Changes produces in pump head cavity, circular spool uniform stressed, deformation quantity when corresponding circular spool is opened also can reduce, further increase speed of response, the raising of speed of response can effectively prevent diaphragm pump in the moment being converted to exhaust from bleeding, exhaust check valve is while opening, the gas leakage that breather check valve is not also closed completely and caused, the loss and the back draught that avoid pressure and the flow caused owing to leaking gas cause airflow fluctuation.On the one hand by reducing the loss of pressure and flow, the sampling flow of this diaphragm pump can be increased, it is made to meet the requirement of air granule sampler to sampling flow, reduce back draught in addition on the one hand and cause airflow fluctuation, thus improve the stability of air-flow, be particularly useful for the collection of air particle, solve existing diaphragm pump and be applied to air particle when gathering, because gas is unstable, and affect the problem of particulate matter collecting efficiency.
In addition, the diaphragm pump of the present embodiment is by adopting bull pump structure, 180 degree of phase alternations run and make bleeding of two pump heads staggered with exhaust process, in working procedure, a pump head is bled, another pump head is vented, interleaved operation, compensatory pause, the effect reducing gas further can also be played, be particularly useful in air granule sampler.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a diaphragm pump, comprise housing, be arranged at the barrier film suction structure assembly in housing, for driving the motor of described barrier film suction structure assembly, be arranged at the pump head component of described shell one end, the output shaft of described motor is fixedly installed eccentric wheel, described barrier film suction structure assembly comprises the connecting rod be connected with described eccentric wheel bias, the joint shaft bearing be connected with described connecting rod, the round tablet be connected with joint shaft bearing, and the diaphragm of annular, the inner ring limit of described diaphragm is fixed by described compressing tablet pressing, outer annular edge and described pump head component are fixed, it is characterized in that, described pump head component comprises pump head seat, be arranged at the valve block seat of described pump head seat upper surface, and be arranged at the pump head upper cover of described valve block seat upper surface, the outer annular edge of described diaphragm is clipped between described pump head seat and described valve block seat, the seal space that described pump head seat and described valve block seat surround is pump head cavity, in described pump head upper cover, there is gas-entered passageway and exhaust passage, multiple breather check valve is provided with between described gas-entered passageway and pump head cavity, multiple exhaust check valve is provided with between described exhaust passage and pump head cavity, the valve block of described breather check valve and exhaust check valve is bivalve membrane structure, comprise O-ring seal and be arranged on the circular spool of O-ring seal inside, described circular spool is connected with described O-ring seal by two symmetrical joints.
2. diaphragm pump according to claim 1, is characterized in that, described compressing tablet is metal material, and the diameter of described compressing tablet with the ratio of the internal diameter of described pump head cavity is: 2: 3.
3. diaphragm pump according to claim 2, it is characterized in that, described joint shaft bearing comprises the outer ring that an inner ring with outer spherical surface and have inner ball surface, described compressing tablet center has the boss protruded downwards, described boss center has the mounting hole for installing described joint shaft bearing outer ring, and described connecting rod is connected with the inner ring of described joint shaft bearing.
4. the diaphragm pump according to any one of claim 1-3, is characterized in that, described eccentric wheel is installed with balancing weight away from the position with connecting rod joint.
5. the diaphragm pump according to any one of claim 1-3, is characterized in that, described breather check valve and exhaust check valve are structure as a whole.
6. a diaphragm pump, described diaphragm pump is bull pump, comprise housing, motor, be symmetricly set on the barrier film suction structure assembly in described housing, be arranged at the pump head component at described housing two ends respectively, the output shaft of described motor is fixedly installed eccentric wheel, described barrier film suction structure assembly comprises the connecting rod be connected with described eccentric wheel bias, the joint shaft bearing be connected with described connecting rod, the round tablet be connected with joint shaft bearing, and the diaphragm of annular, the inner ring limit of described diaphragm is fixed by described compressing tablet pressing, the pump head component of outer annular edge and this side, diaphragm place is fixed, it is characterized in that, pump head component comprises pump head seat, be arranged at the valve block seat of described pump head seat upper surface, and be arranged at the pump head upper cover of described valve block seat upper surface, the outer annular edge of diaphragm is clipped between described pump head seat and described valve block seat, the seal space that described pump head seat and described valve block seat surround is pump head cavity, there is in pump head upper cover gas-entered passageway and exhaust passage, multiple breather check valve is provided with between described gas-entered passageway and pump head cavity, multiple exhaust check valve is provided with between described exhaust passage and pump head cavity, the valve block of described breather check valve and exhaust check valve is bivalve membrane structure, comprise O-ring seal and be arranged on the circular spool of O-ring seal inside, described circular spool is connected with described O-ring seal by two symmetrical joints, the gas-entered passageway laying respectively at two pump head upper covers at housing two ends is connected, the exhaust passage of described two pump head upper covers is connected.
7. diaphragm pump according to claim 6, is characterized in that, described compressing tablet is metal material, and the diameter of described compressing tablet with the ratio of the internal diameter of described pump head cavity is: 2: 3.
8. diaphragm pump according to claim 7, it is characterized in that, described joint shaft bearing comprises the outer ring that an inner ring with outer spherical surface and have inner ball surface, described compressing tablet center has the boss protruded downwards, described boss center has the mounting hole for installing described joint shaft bearing outer ring, and described connecting rod is connected with the inner ring of described joint shaft bearing.
9. the diaphragm pump according to any one of claim 6-8, is characterized in that, described eccentric wheel is installed with balancing weight away from the position with connecting rod joint.
10. the diaphragm pump according to any one of claim 6-8, is characterized in that, described breather check valve and exhaust check valve are structure as a whole.
CN201510115605.XA 2015-03-10 2015-03-10 A kind of membrane pump CN104791228B (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN105298810A (en) * 2015-11-18 2016-02-03 安徽工程大学 Membrane for membrane pump
WO2017177608A1 (en) * 2016-04-15 2017-10-19 宁波新邦工具有限公司 Inflator pump using cone valve
WO2019061160A1 (en) * 2017-09-28 2019-04-04 深圳市大疆创新科技有限公司 Pump device and plant protection unmanned aerial vehicle having same
CN110778393A (en) * 2019-09-30 2020-02-11 广西擎芯动力科技有限公司 Auxiliary air pump of direct injection engine in ignition type low-pressure cylinder

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JP2000186672A (en) * 1998-12-22 2000-07-04 Fujikura Rubber Ltd Valve structure and electromagnetic diaphragm pump using it
CN201212464Y (en) * 2008-06-11 2009-03-25 张扬 Diaphragm pump
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Publication number Priority date Publication date Assignee Title
CN105298810A (en) * 2015-11-18 2016-02-03 安徽工程大学 Membrane for membrane pump
CN105298810B (en) * 2015-11-18 2019-03-15 安徽工程大学 A kind of diaphragm pump diaphragm
WO2017177608A1 (en) * 2016-04-15 2017-10-19 宁波新邦工具有限公司 Inflator pump using cone valve
WO2019061160A1 (en) * 2017-09-28 2019-04-04 深圳市大疆创新科技有限公司 Pump device and plant protection unmanned aerial vehicle having same
CN110778393A (en) * 2019-09-30 2020-02-11 广西擎芯动力科技有限公司 Auxiliary air pump of direct injection engine in ignition type low-pressure cylinder

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