CN206208443U - A kind of high pressure pump pressure buffer sensor - Google Patents
A kind of high pressure pump pressure buffer sensor Download PDFInfo
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- CN206208443U CN206208443U CN201621242235.2U CN201621242235U CN206208443U CN 206208443 U CN206208443 U CN 206208443U CN 201621242235 U CN201621242235 U CN 201621242235U CN 206208443 U CN206208443 U CN 206208443U
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- inner core
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- pressure
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Abstract
The utility model belongs to high pressure pump technical field, refer in particular to a kind of high pressure pump pressure buffer sensor, include sensor body, one end of sensor body is provided with pressure sensitive part, the other end is provided with bypass chamber, atmospheric valve knob is provided with bypass chamber, cushion chamber is provided with sensor body, inner core is arranged in cushion chamber, pass through pipeline connection between cushion chamber and bypass chamber, condensation of water vapor is provided between inner core and pressure sensitive part, fluid hole connection condensation of water vapor and the bypass chamber of inner core, fluid course is provided with the outer cylinder of inner core, sample introduction joint is additionally provided with sensor body, the joint and draining connector being connected with follow-up system, sample introduction fittings fluid course, the joint being connected with follow-up system is connected with by pipeline with bypass chamber, draining connector is connected with bypass chamber；The utility model reduces amount of parts, makes system architecture more compact, and reduce leakage point.
Description
Technical field：
The utility model belongs to high pressure pump technical field, refers in particular to a kind of high pressure pump pressure buffer sensor.
Background technology：
For the demand more and more higher of material context of detection, the aspect such as food, medicine and environment is required for making for modern society
Screened with substantial amounts of chemical detection apparatus.However, the sample run into detection is mostly mixture, it is therefore desirable to will be mixed
After compound is separated, one-component could be chemically examined.It is exactly chromatogram to separate conventional method, and liquid chromatogram is to separate big portion
Divide the first-selected chromatographic process of low boiling organic compound.
Liquid chromatogram is developed so far the existing several years, and for liquid chromatogram, several necessary equipment are to provide point respectively
The detector of infusion pump, the chromatographic column of offer split site and last reflection separating resulting from power.Three necessary equipment are all
Final experiment effect is influenced whether, therefore three is optimized one by one.
Existing syringe structure is as shown in figure 1,1 and 2 in figure are a set of eccentric cams.1 used as main cam, drives master
Pump 3 moves back and forth；2 used as auxiliary cam, drives auxiliary pump 4 to carry out front-rear reciprocation movement.System has one section after being left from pump
Bend pipe 5 is used as buffering.Fluid from separator tube 5 out after, into pressure sensor 6, pressure sensor 6 is by the pressure of system
Force signal is sent in work station or control device in the form of voltage.Fluid enters bypass valve 7 after leaving pressure sensor 6,
Bypass valve 7 belongs to One In and Two Out, after fluid enters, can by bypass valve knob control fluid be flowed out all the way from waste liquid or from
Stream flows out all the way.
It is to install buffer that prior art minimizes the method for using for pressure oscillation.Current buffer master on the market
There is this several, one kind is that directly extension pipeline increases stream volume to reduce pressure oscillation, and one kind is fluid-type buffer.
For increasing the buffer of volume using extension pipeline, the effect of this method is not particularly evident, is needed
Increasing significant amount volume can just reach expected pressure oscillation requirement, the separator tube 5 just as shown in Fig. 1.On the market
Once there is the pipeline type buffer of volume up to 7mL.The ratio between this increased volume of buffer and improvement are too low, and
And need the mobile phase of more volume amount just replaceable to finish when solvent is changed.If additionally, applied in low pressure gradient
In system, the overall variation for Gradient program has been even more detrimental effect, and it can slow down the process of whole gradient pressure change,
SRT is caused greatly to extend.
For fluid-type buffer, fluid buffer now on the market is mostly with dimethicone or n-hexane etc.
Compressibility solvent is carrier, the larger dampening chamber of one volume of redesign, by damping diaphragm seals come the pressure of absorbing liquid stream
Pulsation.There is same weak point in this mode and extension manifold volume, exactly considerably increase system dead volume.More not
Profit, the pipeline connector and pipeline of this mode is more, in addition to SRT and stabilization time extend, also increases
A uncertainty for pressure is added.It is exactly that the leakage point of infusion pump also increased simultaneously, to pump after connector and pipeline increase
Pressurize there is no small hidden danger.Additionally, damping barrier film inner sealing compression solvent, these solvents are all high pressure highly corrosives
Chemical solvent.Under the long term of these solvents, damping barrier film is easily damaged.Fluid seepage after breakage, can pollute chromatogram
Instrument, if instrument is currently running during seepage, then the consequence produced after seepage will be even more serious, to the safety evaluation of system
It is also a very big problem.
It is exactly pressure sensor in addition with another problem.
For high performance liquid chromatography, the component that pressure sensor is necessarily present, it can in real time reflect system
Pressure size and pressure oscillation size, make user that one is done to the stability state of system, the operation conditions of infusion pump and preliminary comment
Estimate.
Traditional pressure sensor is connected among system as an independent element.It is accurate for pressure measxurement
Property, except minority is by the pressure sensor of specially treated, most of pressure sensor will reserve certain volume make its with
Pressurized fluid in pipeline is fully contacted.This segment body product is all generally between 0.3~1mL.This for infusion pump, undoubtedly again
One section of dead volume is the introduction of, is unfavorable for solvent displacement and SRT.
The content of the invention：
The high pressure pump that the purpose of this utility model is to provide a kind of high safety, system dead volume is small, leakage point is few
Pressure buffer sensor.
What the utility model was realized in：
A kind of high pressure pump pressure buffer sensor, includes sensor body, is set in one end of sensor body
There are pressure sensitive part, the other end to be provided with bypass chamber, atmospheric valve knob is provided with bypass chamber, be provided with sensor body
Cushion chamber, inner core is arranged in cushion chamber, by pipeline connection between cushion chamber and bypass chamber, between inner core and pressure sensitive part
Condensation of water vapor is provided with, the inner core inside is axially provided with more than one fluid hole, fluid hole connection condensation of water vapor
With bypass chamber, fluid course is provided with the outer cylinder of inner core, sample introduction joint and follow-up is additionally provided with sensor body
The joint and draining connector of system connection, sample introduction fittings fluid course, joint be connected with follow-up system with by pipeline
Connected with bypass chamber, draining connector is connected with bypass chamber, fluid enters condensation of water vapor after entering fluid course from sample introduction joint,
And bypass chamber is flow to by fluid hole, control joint of the fluid by being connected with follow-up system to discharge or by discharge opeing by atmospheric valve knob
Joint is discharged.
In a kind of above-mentioned high pressure pump pressure buffer sensor, the pressure sensitive part is corresponding to condensation of water vapor
Inwall between be provided with sealing ring.
In a kind of above-mentioned high pressure pump pressure buffer sensor, the fluid course is helical groove, or is spaced
The annular groove of inner core outer cylinder is arranged on, is connected by interface channel between each annular groove.
In a kind of above-mentioned high pressure pump pressure buffer sensor, the helical groove is unidirectional or multidirectional stream.
In a kind of above-mentioned high pressure pump pressure buffer sensor, the outer cylinder of the inner core is tight with buffering cavity wall
Close connection.
In a kind of above-mentioned high pressure pump pressure buffer sensor, the sample introduction joint is by being arranged on sensor sheet
Inlet on body is connected with fluid course.
In a kind of above-mentioned high pressure pump pressure buffer sensor, it is provided between the sample introduction joint and inlet
On-line filtration pad.
In a kind of above-mentioned high pressure pump pressure buffer sensor, the joint and pipeline being connected with follow-up system
Between by liquid outlet channel connect, on-line filtration pad is provided between liquid outlet channel and the joint.
In a kind of above-mentioned high pressure pump pressure buffer sensor, the inner core is made up of solids elastomeric material.
The advantage that the utility model is protruded compared to existing technology is：
1st, the inner core that the utility model is made of solids elastomeric material, the company of sealing between inner core and sensor body inwall
Connect, in the absence of the problem of fluid seepage.
2nd, system dead volume of the present utility model is 1/5 of the conventional pressure buffer sensor with identical buffering effect,
Effectively reduce the delayed volume of system.
3rd, the utility model has saved stainless steel pipeline by the way of fluid flowing path is carved on solids elastomeric material
Material, reduces cost.
4th, existing atmospheric valve, buffer and pressure sensitive part integrated design are reduced component number by the utility model
Amount, makes system architecture more compact, and reduce leakage point.
5th, the utility model and stream are completely attached to and contacting volume is smaller, can the instant pressure of reaction system in time, instead
Feedforward information is more convenient for the regulation of pressure fluctuation.
Brief description of the drawings：
Fig. 1 is the structural representation of background technology infusion pump；
Fig. 2 is structural representation of the present utility model；
Fig. 3 is cross-sectional view of the present utility model；
Fig. 4 is the profile of the utility model inner core.
Specific embodiment：
The utility model is further described with legend below, particular content is referring to Fig. 2-4：
The utility model can replace the work(of the separator tube of existing infusion pump, pressure sensitive part and bypass atmospheric valve three
Can, and only pipeline connector is greatly subtracted with leakage point in outer reservation one inlet and two liquid outlets of sensor body 10
It is few.
As shown in Figures 2 and 3, Fig. 3 is profile, main presentation inside of the present utility model to the concrete structure of utility model
Structure and internal flow path mobility status；Fig. 2 is to show outer shape of the present utility model and joint location.
A kind of high pressure pump pressure buffer sensor, includes sensor body 10, in one end of sensor body 10
It is provided with the pressure sensitive part 20, other end and is provided with bypass chamber 30, bypass chamber 30 is interior is provided with atmospheric valve knob 40.In sensor
Cushion chamber is provided with body 10, inner core 60 is arranged in cushion chamber, is connected by passage 100 between cushion chamber and bypass chamber 30
It is logical, condensation of water vapor 70 is provided between inner core 60 and pressure sensitive part 20.The monitoring pressure in real time induction cavity of pressure sensitive part 20
Simultaneously be sent to pressure signal in transfusion pump control system by 70 pressure, and control system is repaiied according to the pressure signal and carrying for receiving
Positive program adjust automatically pressure parameter, forms a closed-loop control, and dynamic pressure control fluctuates to current system minimum value.Including
Fluid course 80 is provided with the outer cylinder of core 60, sample introduction joint 90, sample introduction joint 90 are additionally provided with sensor body 10
Connection fluid course 80, is additionally provided with the joint 110 being connected with follow-up system in sensor body 10, and the joint 110 passes through
Connected with bypass chamber 30, draining connector 120 be additionally provided with sensor body 10, draining connector 120 is connected with bypass chamber 30,
Fluid enters fluid course entrance condensation of water vapor 70 after 80s from sample introduction joint 90, and flow to bypass chamber 30 by fluid hole 601,
Control that joint 110 of the fluid by being connected with follow-up system is discharged or draining connector 120 is discharged by atmospheric valve knob 40.Wherein, after
Continuous system is detecting system or piece-rate system or sampling system etc..
The utility model using solids elastomeric material as inner core 60, to reduce safety issue.Solids elastomeric material is such as：Three
Fluoropolymer such as fluorine vinyl chloride or Kynoar etc..Solids elastomeric material elastic modelling quantity requirement at normal temperatures 1.0~
Between 4.0Gpa, the Poisson's ratio of material (elastic constant of reflection material transversely deforming) between 0.1~0.4, material glass
100 DEG C of temperature ＞, material can not be corroded by most of liquid phase solvent, and material at normal temperatures will not be molten with the liquid phase for being used
Agent chemically reacts.
Specifically, inner core 60 is made of compressible resin material.Its decrement and pressure are directly proportional, in pressure rise
When, deformation quantity will also increase, therefore can effectively absorb the pressure fluctuation of fluid, particularly high-frequency pressure fluctuation peak.It is theoretical
On, the bigger elastomeric material buffering effect of deformation quantity is better under identical pressure increment, but also to consider material with stream
Whether chemical action can be produced between dynamic phase.Due to the characteristic of solids elastomeric material, mobile phase has to be contacted with elastomeric material,
Therefore the necessary corrosion-resistant, organic solvent-resistant of material, and the change of chemical property will not occur in the pressure limit of liquid chromatogram.
What elastomeric material was leaned on to compensator or trimmer pressure is not manifold volume but material deformation quantity in itself, it is possible in material
In material deformation allowed band, the engraving radius of stream should be as far as possible small.Generally, an overall volume is (approximate with the volume of cylinder
Calculate) it is 6 cubic centimetres of elastomeric material, when it is 300 microlitres to carve fluid course 80, it is possible to play good buffering
Effect, and reach the common pipeline type buffer of equivalent effect, then need 1.5 milliliters of volume.
After fluid flows out from infusion pump, into sample introduction joint 90.Sample introduction joint 90 is pump and connection of the present utility model
Point, belongs to the potential point for having leakage possibility.But sample introduction joint 90, in addition to the part with fluid communication, remainder is close
Envelope.
Fluid enter sample introduction joint it is after 90s, by inner core 60 carve fluid course 80, enter into condensation of water vapor 70 it
In.Fluid course 80 is helical groove, or passes through interface channel between the annular groove of the outer cylinder of inner core 60, each annular groove
It is connected.Wherein, the interval of annular groove uses equidistant or displacement, helical groove to select one-way fluid path or multidirectional stream.
Fluid course 80 mainly has two effects, and one is to utilize runner spiral-shaped in itself, plays reduction pressure oscillation
Effect；Another is that the pressure of runner is evenly distributed on into elastomeric material (i.e. inner core 60) surface.Pressure sensitive part 20 passes through
The pressure size of the fluid real-time monitoring highly effective liquid phase chromatographic system in condensation of water vapor 70 and pressure oscillation.
There is the fluid hole 601 of one or more in the inside (as shown in Figure 4) of inner core 60, a stream is only shown in figure
The position that fluid apertures 601 is likely to be at, can be according to the quantity of the bottom surface radial design fluid hole 601 of inner core, specifically in actual conditions
Number can be adjusted voluntarily.But no matter quantity is how many, this fluid hole 601 plays a part of what is be just as, so introduce
When only with a fluid hole 601 as an example.
Fluid hole 601 has three effects, and first effect is connection condensation of water vapor 70 and bypass chamber 30；Second effect
It is protection pressure sensitive part 20, if fluid course 80 is blocked by impurity, pressure can also be discharged by fluid hole 601, in order to avoid
Pressure is excessive to damage pressure sensitive part 20；3rd effect is to apply an internal pressure to inner core 60.
According to design concept of the present utility model, the reduction of pressure oscillation is primarily due to inner core 60 and produces shape when being pressurized
Become, then produce corresponding drag, this part of drag counteracts the pressure oscillation of the part of fluid hole 601.Therefore, inner core 60
Can deformation quantity it is bigger, buffering effect is better.Internally pressure (being applied by fluid hole 601) and external pressure are (by fluid course 80
Apply) two-way collective effect under, the elastic deformation of inner core 60 will be exhibited to the limit.If not increasing fluid hole 601, in that
Core 60 can produce the surface that elastically-deformable part only has fluid course 80 to flow through；After increasing fluid hole 601, the whole body of inner core 60
Product can produce elastic deformation, and the buffering effect for thus bringing will be significantly better than situation when not increasing fluid hole 601.This
Outward, inner core 60 is advantageous in that, with the increase of system pressure (pressure that fluid hole 601 applies to material), the shape of inner core 60
Variable can also increase, while the reduction pressure oscillation played a part of can also strengthen, so can be to the pressure fluctuation of system
Appropriate dynamic compensation is carried out, will not make system pressure pulsatile change excessive because of the increase of pressure, decrease calculating pressure
The step of force compensating coefficient.
Fluid reaches bypass chamber 30 via fluid hole 601 from condensation of water vapor 70, determines stream by atmospheric valve knob 40 afterwards
Body flow export.If atmospheric valve knob 40 is tightened, fluid will flow out from the joint 110 being connected with follow-up system, behind with chromatogram
Post or system are connected；If atmospheric valve knob 40 is in relaxation state, because the pressure in bypass chamber 30 is less than and follow-up system
The pressure of the joint 10 of connection, therefore, fluid will flow out from draining connector 120, be directly communicated to waste liquid bottle.
In order to ensure fluid is to enter condensation of water vapor 70 by fluid course 80, and ensure that fluid can be from pressure sensitive
Chamber 70 enters bypass chamber 30 by fluid hole 601, and the outer cylinder of the inner core 60 is closely connected with cushion chamber.
In order to prevent fluid from being leaked between condensation of water vapor 70 and pressure sensitive part 20, in pressure sensitive part 20 and pressure
Sealing ring is provided between the corresponding inwall of induction cavity 70.
More specifically, being provided with sample introduction stream in the sensor body 10, sample introduction joint is provided with sample introduction stream
90, sample introduction stream is connected with inlet 130, is provided with the sample introduction stream between inlet 130 and sample introduction joint 90 online
Filtering pad 140, can filter the trace impurity in fluid, protect pressure buffer sensor and follow-up equipment.
Similarly, the joint 110 being connected with follow-up system is connected by drain pipe road with pipeline 100, with follow-up system
On-line filtration pad is provided between the joint 110 of connection and drain pipe road.The trace impurity in fluid can be filtered, chromatogram is protected
System.
Connected by waste-solution line 50 between draining connector of the present utility model 120 and bypass chamber 30, waste-solution line 50 with
Angle between drain pipe road is in 90 ° of ± 5 ° of settings.
A kind of pressure damping method of high pressure pump pressure buffer sensor of the present utility model, comprises the following steps：
(1) fluid enters the fluid course 80 of inner core 60 from sample introduction joint 90, and inner core 60 is compressed or expanded, system
Pressure oscillation particularly short term pressure fluctuation is fully absorbed by inner core 60, effectively reduces pressure oscillation.
(2) fluid enters condensation of water vapor 70 from the fluid course 80 of inner core 60, and feeling of stress is passed through by pressure sensitive part 20
The pressure oscillation of the fluid in chamber 70 is answered, and by adjusting the transfusion speed reduction pressure oscillation of high pressure pump, it is particularly long
Phase pressure oscillation.
Pressure sensitive part 20 is monitored real-time pressure and pressure signal is sent in transfusion pump control system, control system root
According to the pressure signal for receiving and carry revision program adjust automatically pressure parameter, form a closed-loop control, dynamic pressure control
Fluctuate to current system minimum value.
After pressure sensitive is carried out, fluid in condensation of water vapor 70 is by the more than one stream that is arranged in inner core 60
Fluid apertures flow to bypass chamber.Fluid flow outlet is finally determined by the atmospheric valve knob being arranged in bypass chamber：
When atmospheric valve knob is tightened, passage is not connected with bypass chamber, and fluid is discharged from the joint being connected with follow-up system；
When atmospheric valve knob loosens, passage is connected with bypass chamber, and fluid is discharged from draining connector.
Above-described embodiment is only one of preferred embodiment of the present utility model, not limits implementation of the present utility model with this
Scope, therefore：All equivalence changes done according to shape of the present utility model, structure, principle, all should be covered by guarantor of the present utility model
Within the scope of shield.
Claims (9)
1. a kind of high pressure pump pressure buffer sensor, it is characterised in that：Sensor body is included, in sensor body
One end is provided with pressure sensitive part, the other end and is provided with bypass chamber, atmospheric valve knob is provided with bypass chamber, in sensor body
Cushion chamber is inside provided with, inner core is arranged in cushion chamber, pipeline connection, inner core and feeling of stress are passed through between cushion chamber and bypass chamber
Answer and be provided between part condensation of water vapor, the inner core inside is axially provided with more than one fluid hole, fluid hole connection pressure
Power induction cavity and bypass chamber, fluid course is provided with the outer cylinder of inner core, sample introduction is additionally provided with sensor body and is connect
Head and the joint and draining connector of follow-up system connection, sample introduction fittings fluid course, the joint being connected with follow-up system lead to
Cross pipeline to be connected with bypass chamber, draining connector is connected with bypass chamber, fluid enters pressure after entering fluid course from sample introduction joint
Induction cavity, and bypass chamber is flow to by fluid hole, control joint of the fluid by being connected with follow-up system to discharge by atmospheric valve knob
Or discharged by draining connector.
2. a kind of high pressure pump pressure buffer sensor according to claim 1, it is characterised in that：The pressure sensitive
Sealing ring is provided between part inwall corresponding with condensation of water vapor.
3. a kind of high pressure pump pressure buffer sensor according to claim 1, it is characterised in that：The fluid course
It is helical groove, or is disposed on the annular groove of inner core outer cylinder, is connected by interface channel between each annular groove.
4. a kind of high pressure pump pressure buffer sensor according to claim 3, it is characterised in that：The helical groove
It is unidirectional or multidirectional stream.
5. a kind of high pressure pump pressure buffer sensor according to claim 1, it is characterised in that：Outside the inner core
Cylinder is closely connected with buffering cavity wall.
6. a kind of high pressure pump pressure buffer sensor according to claim 1, it is characterised in that：The sample introduction joint
Connected with fluid course by the inlet being arranged in sensor body.
7. a kind of high pressure pump pressure buffer sensor according to claim 6, it is characterised in that：The sample introduction joint
On-line filtration pad is provided between inlet.
8. a kind of high pressure pump pressure buffer sensor according to claim 1, it is characterised in that：It is described with follow-up system
Connected by liquid outlet channel between the joint and pipeline of system connection, on-line filtration pad is provided between liquid outlet channel and the joint
Piece.
9. a kind of high pressure pump pressure buffer sensor according to claim 1, it is characterised in that：The inner core is solid
Body elasticity material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621242235.2U CN206208443U (en) | 2016-11-21 | 2016-11-21 | A kind of high pressure pump pressure buffer sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621242235.2U CN206208443U (en) | 2016-11-21 | 2016-11-21 | A kind of high pressure pump pressure buffer sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206208443U true CN206208443U (en) | 2017-05-31 |
Family
ID=58748842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621242235.2U Withdrawn - After Issue CN206208443U (en) | 2016-11-21 | 2016-11-21 | A kind of high pressure pump pressure buffer sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206208443U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404272A (en) * | 2016-11-21 | 2017-02-15 | 浙江福立分析仪器股份有限公司 | High-pressure infusion pump pressure buffer sensor and pressure buffer method |
| CN110514346A (en) * | 2019-08-16 | 2019-11-29 | 李芳芳 | A kind of shock proof pressure transmitter sensing device of novel bradyseism |
| CN113108981A (en) * | 2021-04-01 | 2021-07-13 | 安徽春辉仪表线缆集团有限公司 | Pressure measuring device for porous probe |
-
2016
- 2016-11-21 CN CN201621242235.2U patent/CN206208443U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404272A (en) * | 2016-11-21 | 2017-02-15 | 浙江福立分析仪器股份有限公司 | High-pressure infusion pump pressure buffer sensor and pressure buffer method |
| CN106404272B (en) * | 2016-11-21 | 2022-03-18 | 浙江福立分析仪器股份有限公司 | Pressure buffering sensor and pressure buffering method for high-pressure infusion pump |
| CN110514346A (en) * | 2019-08-16 | 2019-11-29 | 李芳芳 | A kind of shock proof pressure transmitter sensing device of novel bradyseism |
| CN113108981A (en) * | 2021-04-01 | 2021-07-13 | 安徽春辉仪表线缆集团有限公司 | Pressure measuring device for porous probe |
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Legal Events
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170531 Effective date of abandoning: 20220318 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170531 Effective date of abandoning: 20220318 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |