CN209687670U - A kind of continuous flowing syringe pump system - Google Patents
A kind of continuous flowing syringe pump system Download PDFInfo
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- CN209687670U CN209687670U CN201920450614.8U CN201920450614U CN209687670U CN 209687670 U CN209687670 U CN 209687670U CN 201920450614 U CN201920450614 U CN 201920450614U CN 209687670 U CN209687670 U CN 209687670U
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- solenoid valve
- plunger pump
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Abstract
The utility model discloses a kind of continuous flowing syringe pump systems, it includes main control unit, first flow path unit, second flow path unit, liquid-supply unit and dispensing unit, first flow path unit includes the first plunger pump, the first solenoid valve and the first check valve, the outlet end of first plunger pump is connected to the common end of the first solenoid valve, and the normal-closed end of the first solenoid valve is connected to the common end of the first check valve；Second flow path unit includes the second plunger pump, second solenoid valve and second one-way valve, and the second outlet of plunger pump end is connected to the common end of second solenoid valve, and the normal-closed end of second solenoid valve is connected to the common end of second one-way valve；The normally open end of first solenoid valve and second solenoid valve is connected to liquid-supply unit, and the outlet end of the first check valve and second one-way valve is connected to dispensing unit.The utility model realizes that the liquid of continuous flow regime exports by working condition switching and flow control in two channel units, solves defect in the prior art.
Description
Technical field
The utility model relates to the technical fields of liquid conveying, more particularly, are related to a kind of continuous flowing syringe pump system
System.
Background technique
In micro liquid sample introduction application field, continual lasting sample introduction can only be generally realized using peristaltic pump at present.
But the wriggling of peristaltic pump squeezes working method, determines that conveyed liquid certainly exists pulsation phenomenon, so as to cause fluid path
Flow velocity and pressure transient, and this pulsation cannot be completely eliminated.This technological deficiency of peristaltic pump seriously hinders
Peristaltic pump and still replaces wriggling without a kind of reliable technology at present in the use and development in some high-precision applications fields
Pump, reaches the micro liquid sample introduction of high stability.
The stabilization sample introduction of liquid may be implemented in syringe pump technology, and flow velocity is controllable, has obviously in micro-sampling field
Advantage.But current syringe pump technology can only realize intermittent sample introduction by circulation pattern, cannot achieve reliable and stable
Constant flow sample introduction.
Utility model content
In order to solve the problems in the existing technology, the purpose of the utility model is to provide a kind of continuous flowing syringe pumps
System realizes continuous flow by the working condition switching of plunger pump, solenoid valve in two channel units etc. and flow rate control method
The liquid output of dynamic state.
The utility model provides a kind of continuous flowing syringe pump system, and the syringe pump system includes main control unit, the
One channel unit, second flow path unit, liquid-supply unit and dispensing unit, the first flow path unit and second flow path unit are in parallel
Setting, wherein
The first flow path unit includes the first plunger pump, the first solenoid valve and the first check valve, and the first plunger pump goes out
Mouth end is connected to the common end of the first solenoid valve, and the normal-closed end of the first solenoid valve is connected to the common end of the first check valve；
The second flow path unit includes the second plunger pump, second solenoid valve and second one-way valve, and the second plunger pump goes out
Mouth end is connected to the common end of second solenoid valve, and the normal-closed end of second solenoid valve is connected to the common end of second one-way valve；
The normally open end of first solenoid valve and second solenoid valve is connected to liquid-supply unit, first check valve and
The outlet end of two check valves is connected to dispensing unit.
One embodiment of syringe pump system, first plunger pump, the second plunger are continuously flowed according to the utility model
Pump, the first solenoid valve and second solenoid valve be electrically connecteds with main control unit, the main control unit control first plunger pump with
The commutation of the working condition of second plunger pump and the first solenoid valve and second solenoid valve switches.
One embodiment of syringe pump system, first solenoid valve and the second electromagnetism are continuously flowed according to the utility model
Valve is novel high-frequency vacuum solenoid.
One embodiment of continuous flowing syringe pump system according to the present utility model, the main control unit is single-chip microcontroller control
System, PLC controller or computer processed.
One embodiment of continuous flowing syringe pump system according to the present utility model, the liquid-supply unit are liquid storage appearance
Device, the dispensing unit are fluid path adapter or outlet tube road.Compared with prior art, continuous flowing provided by the utility model
Syringe pump system realizes continuous flow by the working condition switching of plunger pump, solenoid valve in two channel units etc. and flow control
The liquid output of dynamic state, solve current syringe pump can only sequencing batch sample introduction defect, have structure simple, easy of integration
The advantages that, flow can be adjusted arbitrarily and can continuous streaming sample introduction.
Detailed description of the invention
Fig. 1 shows the structure principle chart of the continuous flowing syringe pump system according to the utility model exemplary embodiment.
Fig. 2 shows the timing control figures according to the continuous flowing syringe pump system of the utility model exemplary embodiment.
Description of symbols:
1- main control unit, the first plunger pump of 2-, the second plunger pump of 3-, the first solenoid valve of 4-, 5- second solenoid valve, 6- first
Check valve, 7- second one-way valve, 8- liquid-supply unit, 9- dispensing unit.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
.
Fig. 1 shows the structure principle chart of the continuous flowing syringe pump system according to the utility model exemplary embodiment.
As shown in Figure 1, exemplary embodiment according to the present utility model, the continuous flowing syringe pump system includes master control
Unit 1, first flow path unit, second flow path unit, liquid-supply unit 8 and dispensing unit 9, the first flow path unit and second
Road unit is arranged in parallel, and thus, it is possible to the working condition switchings by two channel units to realize continuous flowing shape with flow control
The liquid of state exports.
Specifically, first flow path unit includes the first plunger pump 2, the first solenoid valve 4 and the first check valve 6, the first plunger
The outlet end of pump 2 is connected to the common end of the first solenoid valve 4, and the normal-closed end of the first solenoid valve 4 is connected to the public affairs of the first check valve 6
End altogether.
Second flow path unit includes the second plunger pump 3, second solenoid valve 5 and second one-way valve 7, and the second plunger pump 3 goes out
Mouth end is connected to the common end of second solenoid valve 5, and the normal-closed end of second solenoid valve 5 is connected to the common end of second one-way valve 7.
The normally open end of first solenoid valve 4 and second solenoid valve 5 is connected to liquid-supply unit 8, and the first check valve 6 and second is single
Dispensing unit 9 is connected to the outlet end of valve 7.
When the first solenoid valve 4 or second solenoid valve 5 are powered, the switching of plunger pump rear end fluid path is completed, plunger pump can
It is connected to dispensing unit 9 through check valve, carry out liquid injection can be controlled；When the first solenoid valve 4 or second solenoid valve 5 power off
When, plunger pump only can be connected to liquid-supply unit 8 by the normally open end of solenoid valve, can control carry out Liquid extracting.
Wherein, the first plunger pump 2, the second plunger pump 3, the first solenoid valve 4 and second solenoid valve 5 are electric with main control unit 1
Connection, main control unit 1 can control the working condition and the first solenoid valve 4 and second of the first plunger pump 2 and the second plunger pump 3
The commutation of solenoid valve 5 switches, the automatic control after realizing artificial setting.
Preferably, the first solenoid valve 4 and second solenoid valve 5 that the utility model uses for novel high-frequency vacuum solenoid,
The preferably LVM521 of SMC, has the advantages that small in size, switch speed is fast, internal cavity is minimum and without dead volume, very suitable
Close the operating condition of the utility model.
The main control unit used in the utility model can be single-chip computer control system, PLC controller, computer etc., feed flow
Unit can be liquid storage container, dispensing unit can be various types of fluid path adapters, also can be directly connected to it is subsequent go out
Liquid pipeline；Liquid can be required each class I liquid I, such as water, chemical reagent, medicament, beverage, drinks.
In order to which continuous flowing syringe pump system using the utility model carries out setting flow velocity and flow can be adjusted arbitrarily
Continuous flowing sample injection, needs that specific control method is taken to carry out.
Fig. 2 shows the timing control figures according to the continuous flowing syringe pump system of the utility model exemplary embodiment.
As shown in Fig. 2, specifically including following multiple steps when the continuous flowing syringe pump system of control the utility model.
Wherein, when the first solenoid valve 4 or second solenoid valve 5 being powered, the first plunger pump 2 or the second plunger pump 3 are through first
Check valve 6 or second one-way valve 7 are connected to dispensing unit 9, are had and are opened the first plunger pump 2 or 3 injection pattern of the second plunger pump
Condition；When first solenoid valve 4 or second solenoid valve 5 are powered off, the first plunger pump 2 or the second plunger pump 3 are through the first solenoid valve 4
Or second solenoid valve 5 is connected to liquid-supply unit 8, has the condition for opening the first plunger pump 2 or 3 decimation pattern of the second plunger pump.
Step A: preproduction phase
It controls the first plunger pump 2 and the second plunger pump 3 is in decimation pattern, when in the first plunger pump 2 and the second plunger pump 3
Amount of liquid stop extracting when reaching the half of rated capacity.
When the first solenoid valve 4 and 5 no power of second solenoid valve, after starting the first plunger pump 2 and third plunger pump 3
Start decimation pattern.Preferably, the liquid in liquid-supply unit 8 passes through the normally open end of the first solenoid valve 4 and second solenoid valve 5 respectively
It is pulled into the first plunger pump 2 and the second plunger pump 3 with same flow velocity.That is, the steady extraction of the first plunger pump 2 of control
Speed is equal with the steady extraction speed of the second plunger pump 3.
Wherein, the steady extraction speed in the utility model or smooth injection speed refer to reaches in extraction or injection process
Extraction speed or injection speed when steady state, hereinafter repeat no more.
The B: the 1 operation interval of step
It controls the first plunger pump 2 and is in injection pattern, the second plunger pump 3 of control is in decimation pattern, wherein the second plunger
The steady extraction speed of pump 3 is greater than the smooth injection speed of the first plunger pump 2.
When the energization of the first solenoid valve 4,5 no power of second solenoid valve, the first plunger pump 2 is through the first check valve 6 and liquid out
The connection of unit 9 simultaneously can start injection pattern after the starting of the first plunger pump 2, and the second plunger pump 3 is normal by second solenoid valve 5
Beginning is connected to liquid-supply unit 8 and can start decimation pattern after the starting of the second plunger pump 3.
Main control unit 1 controls the first plunger pump 2 with the speed of setting to 9 injecting fluid of dispensing unit, while main control unit 1
It controls the second plunger pump 3 and liquid is extracted from liquid-supply unit 8 with the continuation of faster speed, i.e., need to guarantee the flat of the second plunger pump 3
The steady smooth injection speed for extracting speed and being greater than the first plunger pump 1.
The C: the 2 operation interval of step
Stop extracting when the amount of liquid in the second plunger pump 3 reaches rated capacity and the first plunger pump 2 is still maintained at note
Emission mode, control second solenoid valve 5 are powered and complete the switching of 3 rear end fluid path of the second plunger pump.
Since the steady extraction rate of the second plunger pump 3 is greater than the smooth injection rate of the first plunger pump 1, at this time the
One plunger pump 2 is still in there are still liquid in injection state and the pump housing.After the switching for completing 3 rear end fluid path of the second plunger pump,
Second plunger pump 3 is connected to dispensing unit through second one-way valve 6.
The D: the 3 operation interval of step
After maintaining the residual liquid quantity in the end-state to the first plunger pump 2 of a upper operation interval to reach set amount gradually
Reduce the injection speed of the first plunger pump 2, while controlling the second plunger pump 3 and being in injection pattern and be gradually increased the second plunger pump
3 injection speed.In the process, two-way liquid injection total flow and the system total flow of setting need to be consistent.
That is, the liquid injection total flow and preset system total flow of control first flow path unit and second flow path unit
Be consistent until the first plunger pump 2 injection speed be decreased to zero and second plunger pump 3 injection speed increase to setting stream
Thus speed steadily, gradual change completes the injection switching of two flow paths.Finally, the injection rate of the first plunger pump 2 is reduced to zero
And stop injecting work, and the injection speed of the second plunger pump 3 increases to maximum and consistent with preset system total flow.
Then, the first solenoid valve 4 of control powers off and completes the switching of 2 rear end fluid path of the first plunger pump, the first plunger pump 2 warp
The normally open end of first solenoid valve 4 is connected to liquid-supply unit.
The E: the 4 operation interval of step
The second plunger pump 3 is controlled in of short duration holding after the end-state of an operation interval to maintain injection pattern and control the
One plunger pump 2 is in decimation pattern, stops extracting when the amount of liquid in the first plunger pump 2 reaches rated capacity.Wherein, described
Of short duration holding is to play the role of stable liquid, the of short duration retention time is preferably 1~5s to buffer and transition.
In the process, main control unit 1 controls the first plunger pump 2 and extracts liquid from liquid-supply unit 8 with faster speed
Until reach setting capacity, and the second plunger pump 3 is constantly in injection pattern, smooth injection speed is equal to setting flow velocity.Its
In, the steady extraction speed of the first plunger pump 2 is greater than the smooth injection speed of the second plunger pump 3
Due to the steady extraction fast speed of the first plunger pump 2, after the first plunger pump 2 reaches rated capacity, the second column
Plug pump 3 still maintains to still have liquid in injection state and the pump housing before this.
Then, the first solenoid valve 4 of control is powered and completes the switching of 2 rear end fluid path of the first plunger pump, the first plunger pump 2 warp
First check valve 6 is connected to dispensing unit 9.
The F: the 5 operation interval of step
After maintaining the residual liquid quantity in the end-state to the second plunger pump 3 of a upper operation interval to reach set amount gradually
Reduce the injection speed of the second plunger pump 3, while controlling the first plunger pump 2 and being in injection pattern and be gradually increased the first plunger pump
2 injection speed.In the process, two-way liquid injection total flow and the system total flow of setting need to be consistent.
That is, the liquid injection total flow and preset system total flow of control first flow path unit and second flow path unit
Be consistent until the second plunger pump 3 injection speed be decreased to zero and first plunger pump 2 injection speed increase to setting stream
Thus speed steadily, gradual change completes the injection switching of two flow paths.Finally, the injection rate of the second plunger pump 3 is reduced to zero
And stop injecting work, and the injection speed of the first plunger pump 2 increases to maximum and consistent with preset system total flow.
Then, control second solenoid valve 5 powers off and completes the switching of 3 rear end fluid path of the second plunger pump, the second plunger pump 3 warp
The normally open end of second solenoid valve 5 is connected to liquid-supply unit 8.
The G: the 6 operation interval of step
The first plunger pump 2 is controlled in of short duration holding after the end-state of an operation interval to maintain injection pattern and control the
Two plunger pumps 3 are in decimation pattern, stop extracting when the amount of liquid in the second plunger pump 3 reaches rated capacity, control second
Solenoid valve 5 is powered and completes the switching of 3 rear end fluid path of the second plunger pump.Wherein, it is described it is of short duration maintain like be in order to buffer and
Stable liquid is played the role of in transition, and the of short duration retention time is preferably 1~5s.
In the process, main control unit 1 controls the second plunger pump 3 and extracts liquid from liquid-supply unit 8 with faster speed
Until reach setting capacity, and the first plunger pump 2 is constantly in injection pattern, smooth injection speed is equal to setting flow velocity.Its
In, the steady extraction speed of the second plunger pump 3 is greater than the smooth injection speed of the first plunger pump 2.
Due to the steady extraction fast speed of the second plunger pump 3, after the second plunger pump 3 reaches rated capacity, the first column
Plug pump 2 still maintains to still have liquid in injection state and the pump housing before this.
Then, control second solenoid valve 5 is powered and completes the switching of 3 rear end fluid path of the second plunger pump, the second plunger pump 3 warp
Second one-way valve 7 is connected to dispensing unit 9.
Step H:
Circulation carries out step D~G and repeats system in the 3rd operation interval to the 6th operation interval, realizes setting flow velocity
Continuous flow injection.
In step B, step E and step G, the smooth injection speed for controlling the first plunger pump 2 or the second plunger pump 3 is to set
Constant current speed specifically can be set and be adjusted according to injection operating condition.
In conclusion the utility model by the working condition switching of plunger pump, solenoid valve in two channel units etc. and
Flow control realizes the liquid output of continuous flow regime.The utility model solve current syringe pump can only sequencing batch into
The defect of sample has many advantages, such as that structure is simple, easy of integration, and flow can be adjusted arbitrarily and can continuous streaming sample introduction.
The utility model is not limited to specific embodiment above-mentioned.The utility model expands to any in this specification
The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group
It closes.
Claims (5)
1. a kind of continuous flowing syringe pump system, which is characterized in that the syringe pump system includes main control unit, first flow path list
Member, second flow path unit, liquid-supply unit and dispensing unit, the first flow path unit and second flow path unit are arranged in parallel,
In,
The first flow path unit includes the first plunger pump, the first solenoid valve and the first check valve, the outlet end of the first plunger pump
It is connected to the common end of the first solenoid valve, the normal-closed end of the first solenoid valve is connected to the common end of the first check valve；
The second flow path unit includes the second plunger pump, second solenoid valve and second one-way valve, the outlet end of the second plunger pump
It is connected to the common end of second solenoid valve, the normal-closed end of second solenoid valve is connected to the common end of second one-way valve；
The normally open end of first solenoid valve and second solenoid valve is connected to liquid-supply unit, first check valve and the second list
Dispensing unit is connected to the outlet end of valve.
2. continuous flowing syringe pump system according to claim 1, which is characterized in that first plunger pump, the second column
Plug pump, the first solenoid valve and second solenoid valve are electrically connected with main control unit, and the main control unit controls first plunger pump
With the commutation switching of the working condition and the first solenoid valve and second solenoid valve of the second plunger pump.
3. continuous flowing syringe pump system according to claim 1, which is characterized in that first solenoid valve and the second electricity
Magnet valve is novel high-frequency vacuum solenoid.
4. continuous flowing syringe pump system according to claim 1, which is characterized in that the main control unit is single-chip microcontroller control
System, PLC controller or computer processed.
5. continuous flowing syringe pump system according to claim 1, which is characterized in that the liquid-supply unit is liquid storage appearance
Device, the dispensing unit are fluid path adapter or outlet tube road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450614.8U CN209687670U (en) | 2019-04-03 | 2019-04-03 | A kind of continuous flowing syringe pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450614.8U CN209687670U (en) | 2019-04-03 | 2019-04-03 | A kind of continuous flowing syringe pump system |
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| Publication Number | Publication Date |
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| CN209687670U true CN209687670U (en) | 2019-11-26 |
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| CN201920450614.8U Active CN209687670U (en) | 2019-04-03 | 2019-04-03 | A kind of continuous flowing syringe pump system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826772A (en) * | 2019-04-03 | 2019-05-31 | 四川轻化工大学 | A kind of continuously flowing syringe pump system and its control method |
| CN113495165A (en) * | 2020-04-02 | 2021-10-12 | 中国科学院深圳先进技术研究院 | Continuous liquid sampling system and control method thereof |
-
2019
- 2019-04-03 CN CN201920450614.8U patent/CN209687670U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826772A (en) * | 2019-04-03 | 2019-05-31 | 四川轻化工大学 | A kind of continuously flowing syringe pump system and its control method |
| CN113495165A (en) * | 2020-04-02 | 2021-10-12 | 中国科学院深圳先进技术研究院 | Continuous liquid sampling system and control method thereof |
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