CN206617303U - Low pulse low discharge aspiration pump - Google Patents
Low pulse low discharge aspiration pump Download PDFInfo
- Publication number
- CN206617303U CN206617303U CN201720402743.0U CN201720402743U CN206617303U CN 206617303 U CN206617303 U CN 206617303U CN 201720402743 U CN201720402743 U CN 201720402743U CN 206617303 U CN206617303 U CN 206617303U
- Authority
- CN
- China
- Prior art keywords
- pump
- gas
- cavity volume
- air inlet
- aspiration pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model provides a kind of low pulse low discharge aspiration pump, including aspiration pump, aspiration pump is arranged on pump bracket, gas cavity volume is installed on the pump bracket, the enterprising gas port of the gentle cavity volume in gas outlet on gas cavity volume is offered at the top of the gas cavity volume, the bottom of gas cavity volume offers under the gas cavity volume being isolated from each other air inlet under the gentle cavity volume in gas outlet, gas outlet is connected with the air inlet of aspiration pump under gas cavity volume, air inlet is connected with the gas outlet of aspiration pump under gas cavity volume, gas outlet connects the flexible air appearance air inlet opened up in flexible air appearance by pipeline on the gas cavity volume, flexible air holds the pressure tap being further opened with the flexible air appearance gas outlet of atmosphere and for being connected little differential pressure sensor, the utility model is in the range of extraction flow, greatly reduce the pulsation of instantaneous delivery, improve the accuracy in computation of integrated flow.The extraction flow lower limit smooth starting of pump, can be as needed, can adjust extraction flow lower limit and scope.
Description
Technical field
The utility model is related to a kind of low discharge aspiration pump for gas sampler, specifically a kind of low pulse low discharge
Aspiration pump.
Background technology
Low discharge aspiration pump is the important component of gas sampler, for gathering the dioxy in atmospheric environment and plant site
Change the special requisite instrumentation of the pernicious gases such as sulphur, carbon monoxide, nitrogen oxides.Be widely used in indoor and outdoor atmosphere environment supervision,
The monitoring of hygiene and evaluation in the fields such as prevention from suffering from the diseases, safety supervision, military affairs, meteorology, research and teaching, metallurgy, chemical industry, railway, building materials,
It can be supported the use with relevant instrument.The environment in the labor operation place of harm gas is typically evaluated with air sampler,
Influence of labor operation class pernicious gas to health is weighed, to the research of prevention and cure of occupational disease, production environment, equipment
Transformation provides theoretical foundation.The method of pernicious gas mass concentration is weight calculation method in air sampler measurement air, and its principle is
The air of certain volume is extracted with the air sampler, the absorbing liquid that pernicious gas is sampled in bottle absorbs, in lab analysis
Go out the quality of pernicious gas in absorbing liquid, the mass concentration of pernicious gas is calculated according to following equation：
In formula：ρ --- mass concentration of --- ----gas, mg/m3；
The quality of pernicious gas, mg in m----------- absorbing liquids；
Q----------- sampling flows, L/min；
T----------- sampling times, min；
From above formula, certain pernicious gas mass concentration is accurately measured, is had with controlling sampling flow and sampling time
Close, the problem of sampling time control is not present big, key is to control sampling pump extraction flow, but the flow pulsation of aspiration pump is
Objective reality, the low side in sampling pump exhaust capacity is particularly, instantaneous extraction flow is extremely unstable, fluctuates very big, sampling
The fluctuation of pumping throughput, necessarily causes the error of gas production cumulative volume, thus causes the error of gaseous mass concentration, for essence
Really metering adds up gas production volume, it is proposed that the low side flow for how resolving pump is evacuated the problem of stability.Original gas sampling
Device measures instantaneous gas production flow using spinner flowmeter mostly, when sampling flow is in low side, due to the pulsation of aspiration pump, turns
Play above and below subflow gauge float, it is difficult to reading, can only estimate one numerical value of reading in the equilbrium position of play up and down, instantaneous with this
Flow and the product of time, obtained accumulative gas production volume, it is seen that the influence to gaseous mass concentration accuracy.In low discharge gas production
In system, how to solve the problems, such as that sampling flow low side starts, low side flow trim and sampling load capacity are crucial！
Utility model content
The utility model is that pump devises front and rear capacitance-resistance filter, it is integrated in into one with pump to solve the above problems
Body, starts the big problem of flowed fluctuation with regard to that can efficiently solve gas samping pump low side, has scientifically taken into account flux lower limit steady
Start the relation of the load capacity of work and flow rate upper limit, improve the accuracy of gas sampling volume.
The technical solution of the utility model：A kind of low pulse low discharge aspiration pump, including aspiration pump, aspiration pump are arranged on pump
On bracket, it is provided with the pump bracket at the top of gas cavity volume, the gas cavity volume and offers the gentle cavity volume in gas outlet on gas cavity volume
Enterprising gas port, the bottom of gas cavity volume offers under the gas cavity volume being isolated from each other air inlet, gas cavity volume under the gentle cavity volume in gas outlet
Lower gas outlet is connected with the air inlet of aspiration pump, and air inlet is connected with the gas outlet of aspiration pump under gas cavity volume, on the gas cavity volume
Gas outlet connects flexible air by pipeline and holds the flexible air appearance air inlet opened up, and flexible air, which holds, to be further opened with and air company
Logical flexible air holds gas outlet and the pressure tap for connecting little differential pressure sensor, and air holds through the enterprising gas port of gas cavity volume into gas
Then chamber enters aspiration pump through gas outlet under gas cavity volume, from air inlet output under gas cavity volume through gas cavity volume after being promoted through aspiration pump
Upper gas outlet be transported to flexible air hold in again by flexible air hold gas outlet discharge, the aspiration pump, pump bracket, gas cavity volume and
Flexible air holds composition low pulse low discharge aspiration pump.
The aspiration pump includes being interference fitted fixed eccentric, eccentric wheel sleeve in direct current generator, the rotating shaft of direct current generator
Bearing, bearing outer ring loads connecting-rod bearing position, and connecting rod is connected with pump skin, and pump skin is pressed abd fixed on connecting rod by pump skin pressing plate,
Pump skin pressing plate is fixedly connected by housing screw with connecting rod, and pump skin is arranged in the pump chamber of pump chamber valve plate, pump chamber valve plate back in
The one side of pump chamber is provided with pumping diaphragm valve block, and pumping diaphragm valve block covers pump chamber air inlet and the pump chamber gas outlet of pump chamber valve plate, air chamber
Pumping diaphragm valve block is clipped between the two by plate with pump chamber valve plate, is provided with the air chamber plate and pump chamber air inlet and pump chamber gas outlet
The air inlet of the aspiration pump of correspondence connection and gas outlet, eccentric wheel are driven by bearing drivening rod bilateral reciprocation, connecting rod
Pump skin moves back and forth to promote pumping diaphragm valve block in pump chamber.
The centre of the pumping diaphragm valve block is provided with the circular valve block of two free floatings under the gas pressure of pump chamber, is used for
Open or close pump chamber air inlet and pump chamber gas outlet.
The thickness of the pumping diaphragm valve block is 0.7~0.9 millimeter.
The pump chamber valve plate includes the pumping diaphragm valve block chamber for being easy to set pumping diaphragm valve block, and pumping diaphragm valve block intracavitary is offered and pump chamber
The pump chamber air inlet of connection and pump chamber gas outlet, the pump chamber gas outlet set the boss of oriented pumping diaphragm valve block chamber protrusion, described
The side wall of pump chamber is arranged to the conical surface with gradient, and shape of the conical surface with pump skin in maximum lift matches.
The gas cavity volume is separated into air inlet cavity and outlet cavity, inlet chamber body and is provided with demarcation strip at equal intervals,
What is interlocked on demarcation strip offers opening the air for entering air inlet cavity is entered into row buffering.
Sponge block is filled with the opening opened up on the demarcation strip.
The flexible air, which holds to be additionally provided with flexible air cavity volume, flexible air cavity volume, is provided with diaphragm, the bottom that flexible air holds
It is provided with for flexible air to be held into the connecting plate being connected with gas cavity volume.
The flexible air appearance is fastenedly connected with gas cavity volume by being arranged on the attachment screw on the outside of connecting plate.
Air inlet and aspiration pump go out under the gentle cavity volume of the air inlet connectivity part of gas outlet and aspiration pump under the gas cavity volume
Gas port connectivity part is provided with sealing gasket, and the aspiration pump is connected by trip bolt with pump bracket.
Technique effect of the present utility model：In the range of extraction flow, the pulsation of instantaneous delivery is greatly reduced, is improved
The accuracy in computation of integrated flow.The extraction flow lower limit smooth starting of pump, can be as needed, can adjust extraction flow lower limit and
Scope.Aspiration pump is wide in same power, same volume conditions down-off scope, and pumping negative pressure is big, i.e., exhaust capacity is strong.Band flow measurement
Function is measured, integrated level is high, it is small volume, lightweight.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is Fig. 1 overlooking the structure diagram；
Fig. 3 is the utility model aspiration pump structural representation；
Fig. 4 is the utility model eccentric wheel structure schematic diagram；
Fig. 5 is the utility model pumping diaphragm valve structure schematic diagram；
Fig. 6 is the utility model pump chamber valve board structure schematic diagram；
Fig. 7 is Fig. 6 cross section structure diagram；
Fig. 8 is the gentle holding cavity structure schematic diagram of the utility model pump bracket；
Fig. 9 is Fig. 8 A-A to structural representation；
Figure 10 is Fig. 8 B-B direction structural representation；
Figure 11 is Fig. 8 C-C to structural representation；
Figure 12 is that the utility model flexible air holds structural representation；
Figure 13 is Figure 12 A-A to structural representation.
Label is represented respectively in figure：1- aspiration pumps, 2- pipelines, 3- gas cavity volumes, 4- flexible airs hold, and 5- attachment screws, 6- is close
Packing, 7- pump brackets, 8- trip bolts, 10- direct current generators, 11- bearings, 12- eccentric wheels, 13- connecting rods, 14- housing screws,
15- pump skin pressing plates, 16- pump skins, 17- pump chamber valve plates, 18- pumping diaphragm valve blocks, 19- air chamber plates, 20- air inlets, 21- gas outlets, 31-
Go out under gas outlet on gas cavity volume, the enterprising gas port of 32- gas cavity volumes, 33- air inlet cavitys, 34- demarcation strips, 35- openings, 36- gas cavity volumes
Air inlet under gas port, 37- gas cavity volumes, 38- outlet cavitys, 41- flexible airs hold air inlet, and 42- flexible airs hold gas outlet, and 43- is surveyed
Mouth is pressed, 44- flexible air cavity volumes, 45- diaphragms, 46- connecting plates, 171- pumping diaphragm valve block chambers, 172- pump chamber air inlets, 173- pump chambers go out
Gas port, 174- boss, 175- pump chambers, the 176- conical surfaces.
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings：
As shown in Fig. 1-Figure 13, a kind of low pulse low discharge aspiration pump, including aspiration pump 1, aspiration pump 1 is installed in pump support
On frame 7, gas cavity volume 3 is installed on the pump bracket 7, it is gentle that the top of the gas cavity volume 3 offers gas outlet 31 on gas cavity volume
The enterprising gas port 32 of cavity volume, the bottom of gas cavity volume 3 offers air inlet under the gentle cavity volume in gas outlet 36 under the gas cavity volume being isolated from each other
Gas outlet 36 is connected with the air inlet 20 of aspiration pump under mouth 37, gas cavity volume, the gas outlet of air inlet 37 and aspiration pump under gas cavity volume
Gas outlet 31 connects the flexible air appearance air inlet 41 opened up in flexible air appearance 4 by pipeline 2 on 21 connections, the gas cavity volume,
Flexible air holds the pressure tap being further opened with 4 with the flexible air appearance gas outlet 42 of atmosphere and for being connected little differential pressure sensor
43, air enters in the air inlet cavity 33 of gas cavity volume 3 through the enterprising gas port 32 of gas cavity volume, then enters through gas outlet 36 under gas cavity volume
To aspiration pump 1, it is output to after being promoted through aspiration pump 1 from air inlet 37 under gas cavity volume after outlet cavity 38 through gas outlet on gas cavity volume
31 be transported to flexible air hold 4 in again by flexible air hold gas outlet 42 discharge, the aspiration pump 1, pump bracket 7, gas cavity volume 3 and
Flexible air holds 4 and constitutes low pulse low discharge aspiration pump.
The aspiration pump 1 includes being interference fitted fixed eccentric 12 in direct current generator 10, the rotating shaft of direct current generator 10, eccentric
12 overcoat bearings 11 are taken turns, the outer ring of bearing 11 loads the bearing of connecting rod 13 position, and connecting rod 13 is connected with pump skin 16, and pump skin 16 passes through pump skin pressure
Plate 15 is pressed abd fixed on connecting rod 13, and pump skin pressing plate 15 is fixedly connected by housing screw 14 with connecting rod 13, and pump skin 16 is arranged on
In the pump chamber 175 of pump chamber valve plate 17, pump chamber valve plate 17 is provided with pumping diaphragm valve block 18, pumping diaphragm valve block back to the one side in pump chamber 175
18 cover the pump chamber air inlet 172 of pump chamber valve plate 17 and pump chamber gas outlet 173, and air chamber plate 19 and pump chamber valve plate 17 are by pumping diaphragm valve
Piece 18 is clipped between the two, and connection corresponding with pump chamber air inlet 172 and pump chamber gas outlet 173 is provided with the air chamber plate 19
The air inlet 20 of aspiration pump and gas outlet 21, eccentric wheel 12 pass through the bilateral reciprocation of 11 drivening rod of bearing 13, the band of connecting rod 13
Dynamic pump skin 16 moves back and forth to promote pumping diaphragm valve block 18 in pump chamber 175.
Eccentric wheel constitutes toggle in pump with connecting rod, and eccentric wheel is equivalent to crank, under motor driving, with
Connecting rod is moved back and forth, and connecting rod drives pump skin to be moved back and forth in pump chamber, is constituted the volume change of pump chamber, is formed pump chamber suction and discharge.
Eccentric wheel eccentric distance e is to allow range to design by pump configuration connecting rod, and range is 2e；Designed in eccentric wheel using R as half
The semicircle in footpath is used as flying wheel, is easy to crank, connecting rod in the continuous motion at " dead point ".
Pump work principle：When motor is rotated, eccentric wheel drives pump by bearing drivening rod bilateral reciprocation, connecting rod
Skin is moved back and forth in pump chamber, pump chamber is produced volume change；When connecting rod drives pump skin to left movement, pump chamber formation malleation,
Compression pump intracavity gas, pumping diaphragm valve block is promoted by compressed gas, closes air inlet；Another is promoted by compressed gas simultaneously
Pumping diaphragm valve block, opens gas outlet, and the gas in pump chamber is discharged outside pump chamber.Conversely, when connecting rod drives pump skin to move right, pump
Suction gas in intracavitary formation negative pressure, pump chamber, by sucking gas push pumping diaphragm valve block, closes gas outlet；Pass through suction simultaneously
Gas push pumping diaphragm valve block, opens air inlet；By extraneous gas suction pump intracavitary.Motor is continuously rotated, and the continuous volume of pump chamber becomes
Change, constitute air-breathing, exhaust process repeatedly, realize extraction flow.
Pumping diaphragm valve block material is silicon rubber, and the centre of the pumping diaphragm valve block 18 is provided with two air pressure in pump chamber 175 and made
With the circular valve block of lower free floating, for opening or closing pump chamber air inlet 172 and pump chamber gas outlet 173.
The thickness of the pumping diaphragm valve block 18 is 0.7~0.9 millimeter.
The pump chamber valve plate 17 includes opening in the pumping diaphragm valve block chamber 171 for being easy to set pumping diaphragm valve block 18, pumping diaphragm valve block chamber 171
Provided with the pump chamber air inlet 172 and pump chamber gas outlet 173 connected with pump chamber, the pump chamber gas outlet 173 sets oriented pumping diaphragm valve
The boss 174 that piece chamber 171 is protruded, the side wall of the pump chamber 175 is arranged to the conical surface 176 with gradient, the conical surface 176 and pump skin 16
Shape in maximum lift matches, and can improve the volumetric efficiency of pump, that is, improve the flow and negative pressure of pump；The boss of gas outlet
Be conducive to the closure of pumping diaphragm valve block.
Gas cavity volume 3 is separated into air inlet cavity 33 and outlet cavity 38, and the upper end of air inlet cavity 33 opens up gas cavity volume air inlet
Mouth 32, the upper end of outlet cavity 38 is opened up in gas cavity volume gas outlet 31, air inlet cavity 33 is provided with demarcation strip 34 at equal intervals, point
What is interlocked on dividing plate 34 offers opening 35 air for entering air inlet cavity 33 is entered into row buffering.
Sponge block is filled with the opening 35 opened up on the demarcation strip 34.
Gas cavity volume can make air-flow buffer, play filter action；Air inlet cavity is divided into the cavity that many lattice are communicated by demarcation strip,
Available buffer air-flow, plays filter action, can also fill appropriate sponge according to the range of flow of pump, the actual conditions of load capacity
Block, plays damping filter action, it is ensured that the smooth starting and work of flow low side.When designing gas circuit damping filter, filtrate
The density of material, thickness are the keys of regulation damping size, and gas circuit filter effect is relevant with damping, chamber size, (equivalent to electricity
Capacitance-resistance filter in road).It is worth noting that：Damping is adjusted too small, and air-flow is just not steady enough；Damping is tuned too large, on flow
Limit will not reach, and load capacity is consumed in damping；Therefore, the size of damping will be drawn by experiment, accomplish to meet
The flux lower limit degree of accuracy, the minimum damping of stability requirement, make flow rate upper limit have the load capacity for meeting and requiring.
The flexible air appearance 4, which is additionally provided with flexible air cavity volume 44, flexible air cavity volume 44, is provided with diaphragm 45, and flexible air holds
4 bottom is provided with for flexible air to be held into 4 connecting plates 46 being connected with gas cavity volume 3.
The flexible air holds 4 and is fastenedly connected with gas cavity volume 3 by being arranged on the attachment screw 5 in the outside of connecting plate 46.
Flexible air holds and is connected with air inlet under gas cavity volume, the survey of pressure (the i.e. outlet back pressure) size held by flexible air
Amount, reflects the size of extraction flow；The relation that the size of back pressure is directly proportional to flow.
Flexible air has buffer gas flow, the effect of uniform flexible air chamber pressure, and when designing flexible air appearance, flexible air holds
Size, the diaphragm pliability of chamber are crucial, to consider the effective filtering being evacuated in range of pump flow rates, be determined by experiment flexible air
The relevant parameter of cavity volume, diaphragm etc., only under suitably buffering gas appearance effect, the spike of the pulsation pumping airflow of aspiration pump is
The buffering gas that can be held by flexible air has effect and absorbed, and plays filter action, it is ensured that the stationarity of flexible air cavity volume air pressure.Pressure tap
For being connected with pressure sensor, the size of flexible air cavity volume back pressure is measured；Flexible air holds the millimeter of gas outlet length about 25,
Tapered, mouth endoporus is descending bellmouth from the inside to the outside, and its effect is, according to required range of flow, to intercept phase
The flexible air answered holds outlet diameter, makes flexible air cavity volume back pressure in suitable pressure limit；Under certain flow, outlet diameter is big
Flexible air cavity volume back pressure is small, conversely, the small flexible air cavity volume back pressure of outlet diameter is big.
Gas outlet 36 and air inlet 37 under the gentle cavity volume of the connectivity part of air inlet 20 of aspiration pump and pumping under the gas cavity volume
The connectivity part of gas outlet 21 of pump is provided with sealing gasket 6, and the aspiration pump 1 is connected by trip bolt 8 with pump bracket 7.
The low pulse low discharge aspiration pump course of work：
1. corresponding dc source is connected；
2. direct current generator band movable eccentric wheel is rotated；
3. eccentric wheel is moved back and forth by bearing drivening rod；
4. the pump chamber pressure increase when connecting rod drives pump skin compression pump chamber, gas pressure promotes pumping diaphragm valve block simultaneously
Two valve blocks, that is, open pump chamber gas outlet, simultaneously close off pump chamber air inlet；
5. pump chamber is in barotropic state, and gas is discharged outside pump chamber, carries out air-flow buffer filtering into gas cavity volume, then enter soft
Property air chamber, discharge flexible air holds outer after measurement outlet back pressure.
6. after connecting rod drives pump skin to compress pump chamber to extreme position, then by connecting rod pump skin is driven to stretch out expansion
During pump chamber, pump chamber negative pressure pressure increase, pump chamber gas negative pressure picks up two valve blocks of pumping diaphragm valve block, that is, opens pump chamber simultaneously
Air inlet, simultaneously closes off pump chamber gas outlet；
7. pump chamber be in negative pressure state, by gas outside pump chamber suction pump intracavitary；When connecting rod drives pump skin expansion pump chamber to hold
Product arrives extreme position, then drives pump skin to compress pump chamber by connecting rod, and connecting rod pump skin is moved repeatedly, brings the volume of pump chamber to become
Change, the air inlet outlet of pump chamber is formed the extraction flow of pump.
Eccentric wheel, pump chamber valve plate, gas cavity volume, flexible air capacity materials are ABS；Pump leather material is butyl rubber；
Pumping diaphragm valve block, diaphragm, gasket material are silicon rubber.
It is bonded at bonding connection with chloroform；
Air-tightness：After bond is bonding, assembled by part, soap foam smeared at gas circuit connecting sewing, start aspiration pump,
Observe soap foam to smear at gas circuit connecting sewing, there must not be gas leak phenomenon.
1. aspiration pump gas cavity volume before air inlet, is evacuated air inlet under gas cavity volume and connects flexible air appearance, ensureing aspiration pump stream
On the premise of the load capacity for measuring the upper limit, the smooth starting of flow low side and work of aspiration pump are helped,
2. pump chamber side wall is designed to the conical surface of constant slope, and shape of the conical surface with pump skin in maximum lift matches, carried
The volumetric efficiency of high pump.
3. air pump outlet connects flexible air chamber, passes through the measurement of pressure (i.e. outlet back pressure) size of flexible air cavity volume, reflection
The size of extraction flow；
4. flexible air holds the taper hole that gas outlet is in certain length, by intercepting taper hole length i.e. gas outlet size, adjusts
The size of whole flexible air cavity volume back pressure.
A kind of low pulse low discharge aspiration pump of the present utility model, in the range of extraction flow, greatly reduces instantaneous stream
The pulsation of amount, improves the accuracy in computation of integrated flow.The extraction flow lower limit smooth starting of pump, can be as needed, adjustable
Whole extraction flow lower limit and scope.Aspiration pump is wide in same power, same volume conditions down-off scope, and pumping negative pressure is big, i.e.,
Exhaust capacity is strong.Band measurement of discharge function, integrated level is high, small volume, lightweight.
Claims (10)
1. a kind of low pulse low discharge aspiration pump, including aspiration pump, aspiration pump are arranged on pump bracket, it is characterised in that：It is described
Pump bracket, which is provided with the top of gas cavity volume, the gas cavity volume, offers the enterprising gas port of the gentle cavity volume in gas outlet on gas cavity volume, and gas holds
The bottom of chamber offers gas outlet and pumping under air inlet, gas cavity volume under the gentle cavity volume in gas outlet under the gas cavity volume being isolated from each other
Air inlet is connected with the gas outlet of aspiration pump under the air inlet connection of pump, gas cavity volume, and gas outlet passes through pipeline on the gas cavity volume
Connection flexible air holds the flexible air opened up and holds air inlet, and flexible air, which holds, to be further opened with holding with the flexible air of atmosphere
Gas port and the pressure tap for connecting little differential pressure sensor, air enter gas cavity volume and then through gas cavity volume through the enterprising gas port of gas cavity volume
Lower gas outlet enters aspiration pump, is transported to after being promoted through aspiration pump from air inlet output under gas cavity volume through gas outlet on gas cavity volume
Flexible air holds gas outlet discharge by flexible air again in holding, and it is low that the aspiration pump, pump bracket, gas cavity volume and flexible air hold composition
Pulsation low discharge aspiration pump.
2. low pulse low discharge aspiration pump according to claim 1, it is characterised in that：The aspiration pump includes direct current
Fixed eccentric, eccentric wheel sleeve bearing are interference fitted in machine, the rotating shaft of direct current generator, bearing outer ring loads connecting-rod bearing position,
Connecting rod is connected with pump skin, and pump skin is pressed abd fixed on connecting rod by pump skin pressing plate, and pump skin pressing plate is consolidated by housing screw and connecting rod
Fixed connection, pump skin is arranged in the pump chamber of pump chamber valve plate, and pump chamber valve plate is provided with pumping diaphragm valve block, pumping diaphragm back to the one side in pump chamber
Valve block covers pump chamber air inlet and the pump chamber gas outlet of pump chamber valve plate, and pumping diaphragm valve block is clipped in both by air chamber plate with pump chamber valve plate
Between, the air inlet and outlet of the aspiration pump of connection corresponding with pump chamber air inlet and pump chamber gas outlet are provided with the air chamber plate
Mouthful, eccentric wheel drives pump skin to be moved back and forth in pump chamber so as to driving pump by bearing drivening rod bilateral reciprocation, connecting rod
Film valve block.
3. low pulse low discharge aspiration pump according to claim 2, it is characterised in that：Setting in the middle of the pumping diaphragm valve block
There is the circular valve block of two free floatings under the gas pressure of pump chamber, for opening or closing pump chamber air inlet and pump chamber outlet
Mouthful.
4. low pulse low discharge aspiration pump according to claim 3, it is characterised in that：The thickness of the pumping diaphragm valve block is
0.7~0.9 millimeter.
5. low pulse low discharge aspiration pump according to claim 2, it is characterised in that：The pump chamber valve plate includes being easy to set
The pumping diaphragm valve block chamber of pumping diaphragm valve block is put, pumping diaphragm valve block intracavitary offers the pump chamber air inlet connected with pump chamber and pump chamber gas outlet,
The pump chamber gas outlet sets the boss of oriented pumping diaphragm valve block chamber protrusion, and the side wall of the pump chamber is arranged to the cone with gradient
Face, shape of the conical surface with pump skin in maximum lift matches.
6. low pulse low discharge aspiration pump according to claim 1, it is characterised in that：The gas cavity volume is separated into air inlet
Be provided with equal intervals on demarcation strip, demarcation strip in cavity and outlet cavity, inlet chamber body staggeredly offer opening so as to will
Air into air inlet cavity enters row buffering.
7. low pulse low discharge aspiration pump according to claim 6, it is characterised in that：The opening opened up on the demarcation strip
Place is filled with sponge block.
8. low pulse low discharge aspiration pump according to claim 1, it is characterised in that：The flexible air appearance is additionally provided with soft
Property gas cavity volume, diaphragm is installed, the bottom that flexible air holds is provided with for flexible air to be held and gas cavity volume phase in flexible air cavity volume
The connecting plate of connection.
9. low pulse low discharge aspiration pump according to claim 8, it is characterised in that：The flexible air holds to be led to gas cavity volume
The attachment screw being arranged on the outside of connecting plate is crossed to be fastenedly connected.
10. according to any described low pulse low discharge aspiration pumps of claim 1-9, it is characterised in that：Go out under the gas cavity volume
The gas outlet connectivity part of air inlet and aspiration pump is provided with sealing under the gentle cavity volume of the air inlet connectivity part of gas port and aspiration pump
Pad, the aspiration pump is connected by trip bolt with pump bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720402743.0U CN206617303U (en) | 2017-04-17 | 2017-04-17 | Low pulse low discharge aspiration pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720402743.0U CN206617303U (en) | 2017-04-17 | 2017-04-17 | Low pulse low discharge aspiration pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206617303U true CN206617303U (en) | 2017-11-07 |
Family
ID=60223608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720402743.0U Withdrawn - After Issue CN206617303U (en) | 2017-04-17 | 2017-04-17 | Low pulse low discharge aspiration pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206617303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106870338A (en) * | 2017-04-17 | 2017-06-20 | 武汉碧海云天科技股份有限公司 | Low pulse low discharge aspiration pump |
-
2017
- 2017-04-17 CN CN201720402743.0U patent/CN206617303U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106870338A (en) * | 2017-04-17 | 2017-06-20 | 武汉碧海云天科技股份有限公司 | Low pulse low discharge aspiration pump |
| CN106870338B (en) * | 2017-04-17 | 2018-07-10 | 武汉碧海云天科技股份有限公司 | The small flow aspiration pump of low pulse |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103411864B (en) | The MEMS sensor of structure based resonance measuring gas suspended particles concentration | |
| CN206617303U (en) | Low pulse low discharge aspiration pump | |
| CN110043676A (en) | A kind of pressure seal parallel slide valve | |
| CN106870338B (en) | The small flow aspiration pump of low pulse | |
| CN209387619U (en) | A kind of etch-proof chemical plant air sulfur-bearing amount detecting device | |
| CN204882604U (en) | Novel intelligence material speed of suspension test bench | |
| CN103900863B (en) | A kind of built-in constant current sampler | |
| CN206420689U (en) | One kind vacuumizes the machine of resistance to dust test | |
| CN218937910U (en) | Prevent atmospheric sampling device of suck-back | |
| CN201210075Y (en) | Liquid level collecting device for air permeability ratio surface area instrument | |
| CN210243421U (en) | Oscillating balance with reference oscillator | |
| CN113578542A (en) | Negative pressure oil mist collection device | |
| CN207777031U (en) | Carburetor goes out oil stream amount continuous detection apparatus | |
| CN204064750U (en) | A kind of low discharge air sampler | |
| CN208459224U (en) | Filter membrane/filter cylinder arresting efficiency and resistance detection device | |
| CN206725397U (en) | A kind of porous media testing permeability device | |
| CN206725396U (en) | One kind test porous media permeability experiment platform | |
| CN205808774U (en) | Constant volume method gas sampling assembly | |
| CN111175096A (en) | Portable gas collection system | |
| CN109060297A (en) | Become dam work aerial drainage impact zone under air pressure environment to surge model test method | |
| CN202707459U (en) | Portable and variable pneumatic vacuum generator | |
| CN109916796A (en) | Temperature control guiding device, gas pressure control device and gas permeation test system | |
| CN219614119U (en) | Automatic animal contamination device | |
| CN220434955U (en) | Pressure-adjustable air pump | |
| CN208311017U (en) | A kind of booster-type membrane pump outlet flow and stable water pressure device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171107 Effective date of abandoning: 20180710 |
|
| AV01 | Patent right actively abandoned |