CN207297300U - A kind of peristaltic pump fluid path scaling system - Google Patents
A kind of peristaltic pump fluid path scaling system Download PDFInfo
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- CN207297300U CN207297300U CN201720893258.8U CN201720893258U CN207297300U CN 207297300 U CN207297300 U CN 207297300U CN 201720893258 U CN201720893258 U CN 201720893258U CN 207297300 U CN207297300 U CN 207297300U
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- peristaltic pump
- suction needle
- mixing pond
- fluid path
- stepper motor
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Abstract
It the utility model is related to a kind of peristaltic pump fluid path scaling system, including stepper motor, peristaltic pump, mixing pond, suction needle and control device；The stepper motor connects peristaltic pump, peristaltic pump is used to convey liquid, connecting tube is set on the mixing pond, the connecting tube in the mixing pond is by waste liquid outlet tube, cleaning solution inlet tube and dilution inlet tube composition, the waste liquid outlet tube is positioned at the mixing pond top, the cleaning solution inlet tube and dilution inlet tube are positioned at the mixing pond lower part, the peristaltic pump is connected by connecting tube with mixing pond, the suction needle connects level detection plate, the control device control suction needle probes into mixing pond and is detected twice, control the traveling of stepper motor and calculate the corresponding fluid flow of each step of stepper motor by calculating liquid level difference.
Description
Technical field
It the utility model is related to a kind of caliberating device for peristaltic pump fluid path.
Background technology
The fluid path control system of peristaltic pump is used at present, although can guarantee that liquid flow velocity, due to the work of pump line
Principle, can not ensure the precision of fluid flow, peristaltic pump can ensure higher liquid flow velocity, but have in accuracy
Wait to improve.
Utility model content
The purpose of this utility model, which is to provide one kind, to carry out validation to working fluid, ensure liquid channel system high precision
The device of property.
In order to achieve the above object, there is provided peristaltic pump fluid path scaling system, including stepper motor, peristaltic pump, mixing pond, suction
Sample pin and control device；The stepper motor connects peristaltic pump, and peristaltic pump is used to convey liquid, and connection is set on the mixing pond
Pipe, the connecting tube in the mixing pond are made of waste liquid outlet tube, cleaning solution inlet tube and dilution inlet tube, and the waste liquid goes out
Liquid pipe is described positioned at the mixing pond lower part positioned at the mixing pond top, the cleaning solution inlet tube and dilution inlet tube
Peristaltic pump is connected by connecting tube with mixing pond, and the suction needle connects level detection plate, and the control device controls suction needle
Probe into mix pond carry out twice detect, control stepper motor traveling and by calculate liquid level difference calculate stepper motor it is each
Walk corresponding fluid flow.
The problem of liquid conveying of peristaltic pump would generally face inaccuracy in general calibration process, in order to eliminate error,
The utility model is detected suction needle twice, and stepping electricity is calculated wherein carrying out liquid to peristaltic pump and being transported through liquid level difference
The relation of machine and fluid flow.
The utility model uses three connecting tubes, can be measured for waste liquid, cleaning solution and dilution, if using
A piece connecting tube measures three kinds of liquid, can cause the pollution in course of conveying, is connected effectively with peristaltic pump using three kinds of connecting tubes
Solves the problems, such as this, and peristaltic pump can avoid other under a connecting tube connected state from being connected with mixing the pressure relation in pond
Liquid flows back in pipe.
Preferably, the mixing pond intracavity bottom is conical bottom.
The mixing bottom of pond portion first of conical bottom is to coordinate the design of suction needle, and second is when liquid is a small amount of, is mixed
Pond inner wall is inclined-plane, can from largely reduce liquid wall built-up situation so as to improve mixing when solubility accuracy, third,
Measurement of the mixing pond of conical bottom for liquid level difference has more inaccuracy, and the utility model is eliminated by way of liquid level difference
The error.
Preferably, the control device includes：
Main control unit, sends, main control unit sends stepping electricity to control unit for carrying out logical calculated and command signal
Machine is advanced or stop signal, sends suction needle detectable signal to communication unit, and receive the feedback signal of communication unit transmission；
Described control unit, for controlling stepper motor to advance and stopping；
Suction needle sampling unit, for controlling suction needle position and contacting alarm with liquid in suction needle；
Master control borad, receives the signal of communication unit and controls suction needle to advance and receive the alarm of suction needle sampling unit
When feedback signal.
Preferably, the logical calculated result of the main control unit is delivered to display unit.
Preferably, power supply unit, the power supply unit connection main control unit and control unit are further included.
In the application, stepper motor is directly controlled by control unit, and control unit control stepper motor drives peristaltic pump compacted
After dynamic certain distance, control unit sends suction needle detectable signal to communication unit, is connected to master control borad by bus, and indicate
Detection pin detection liquid level simultaneously returns to detection height value, and rises certain distance, returns to another detection height value, and main control unit is to control
Unit processed, which sends signal controling stepping motor, to be continued to wriggle, and until suction needle detects signal and feeds back, control unit returns to step
Stepper motor step number, logical calculated is carried out by main control unit.
Suction needle also has the function of to inhale sample in itself, level detection, suction sample, perfusion is all rolled into one, improve product
Performance
Preferably, the mixing pool volume is 2ml ± 0.5ml.
Preferably, the connecting tube caliber is 2mm ± 0.5mm.
Preferably, it is cuboid outside the mixing pond.
A kind of peristaltic pump fluid path calibrating method, comprises the following steps：
Step 1, peristaltic pump injects liquid by connecting tube；
Step 2, controller control suction needle carries out detecting liquid level, and liquid height is recorded simultaneously by level detection plate thereon
Rise to certain altitude；
Step 3, peristaltic pump continues to inject certain volume liquid；
Step 4, suction needle detects liquid level and records liquid level and feedback signal stops peristaltic pump；
Step 5, wriggling pump discharge and stepper motor relation are drawn:
Q=[(h2-h1)*s]/a,
Wherein Q often walks pourable amount of liquid, h for stepper motor1For first time liquid level, h2It is high for second of liquid level
Degree, a are stepper motor, and s is mixing pond cross-sectional area.
The utility model is sensed by liquid level twice, draws liquid volume difference twice, the stepping of corresponding driving peristaltic pump
The step number that motor is walked.Actually it is to be sensed by the liquid level of suction needle, draws fluid flow and this pass of the relation of stepper motor steps
System when volume differences twice calculate, eliminates data error, this process is known as liquid calibration, improves to a certain extent
The accuracy of peristaltic pump remains the advantages of peristaltic pump big flow velocity again.
It is to be understood that in the scope of the utility model, above-mentioned each technical characteristic of the utility model and below (such as implementation
Mode) in specifically describe each technical characteristic between can be combined with each other, so as to form new or preferable technical solution.Limit
In length, not repeated them here.
Brief description of the drawings
Fig. 1 is an overall schematic of the utility model；
Fig. 2 is another overall schematic of the utility model
Fig. 3 is the utility model fluid path control block diagram；
Wherein
1- dilution inlet tube 2- cleaning solution inlet tube 3- waste liquid outlet tubes
4- mixes pond 5- suction needles
Embodiment
A kind of peristaltic pump fluid path scaling system as shown in Figure 1 to Figure 3, including peristaltic pump, mixing pond 4, suction needle 5 and control
Device processed；Connecting tube is set on the mixing pond 5, and the peristaltic pump is connected by connecting tube with mixing pond 5, the suction needle 5
Level detection plate is connected, the control device control suction needle probes into mixing pond and is detected twice, and by calculating liquid level height
Degree difference calculates the corresponding fluid flow of each step of stepper motor.The connecting tube in pond is mixed by waste liquid outlet tube 3, cleaning solution inlet tube
2 and dilution inlet tube 1 form, the waste liquid outlet tube 3 is positioned at the mixing pond top, the cleaning solution inlet tube 2 and dilute
Liquid inlet tube 1 is released positioned at mixing 4 lower part of pond.4 bottom of mixing pond is conical bottom.The mixing pool volume is
20ml, the connecting tube caliber are 20mm, are cuboid outside the mixing pond, it is conical bottom to mix 4 intracavity bottom of pond.
The mixing bottom of pond portion first of conical bottom is to coordinate the design of suction needle, and second is when liquid is a small amount of, and mixing pond inner wall is
Inclined-plane, can be from the accuracy of solubility when largely reducing the situation of liquid wall built-up so as to improve mixing, third, conical bottom
Mix measurement of the pond for liquid level difference and have more inaccuracy, and the utility model eliminates the mistake by way of liquid level difference
Difference.
Control device includes：Main control unit, sends, main control unit is single to control for carrying out logical calculated and command signal
Member sends stepper motor traveling or stop signal, and suction needle detectable signal is sent to communication unit, and receives communication unit transmission
Feedback signal；Described control unit, for controlling stepper motor to advance and stopping；Suction needle sampling unit, inhales for controlling
Sample pin position simultaneously contacts alarm in suction needle with liquid；Master control borad, receives the signal of communication unit and controls suction needle to advance
And feedback signal when receiving the alarm of suction needle sampling unit.The logical calculated result of main control unit is delivered to display unit.
Further include power supply unit, the power supply unit connection main control unit and control unit.
Suction needle also has the function of to inhale sample in itself, level detection, suction sample, perfusion is all rolled into one, improve product
Performance.
Dynamic pump liquid road calibrating method, comprises the following steps：
Step 1, peristaltic pump injects liquid by connecting tube；
Step 2, controller control suction needle carries out detecting liquid level, and liquid height is recorded simultaneously by level detection plate thereon
Rise to certain altitude；
Step 3, peristaltic pump continues to inject certain volume liquid；
Step 4, suction needle detects liquid level and records liquid level and feedback signal stops peristaltic pump；
Step 5, wriggling pump discharge and stepper motor relation are drawn:
Q=[(h2-h1)*s]/a,
Wherein Q often walks pourable amount of liquid, h for stepper motor1For first time liquid level, h2It is high for second of liquid level
Degree, a are stepper motor, and s is mixing pond cross-sectional area.
Peristaltic pump moves forward liquid by managing a urgent hydraulically full hose.Peristaltic pump is driven by stepper motor
Movable plate drives, and due to driving peristaltic pump operation principle, it, which is controlled, needs to carry out validation.It is as follows to calibrate flow：
Peristaltic pump cleans
After system run all right, system control suction needle to specified altitude assignment and carries out initialization detecting liquid level.Pass through company
Take over and inject a certain amount of cleaning solution into mixing pond, suction needle, which drops to, senses water level, stops cleaning solution injection, suction needle
Electrode detector produces signal alarm (mixing bottom of pond area to fix, liquid volume is determined by mixing liquid level in pond).Inhale afterwards
Sample pin rises to a high position, continues through connecting tube and injects a certain amount of cleaning solution into mixing pond, is detected again by suction needle
Liquid level produces signal alarm.Peristaltic pump stepper motor total step number and injection when producing alarm by being recorded in suction needle electrode detector
The volume of cleaning solution, draws flow of the peristaltic pump stepper motor per theainfusible liquid of stepping, is able to reach cleaning solution calibration
Effect.
Peristaltic pump dilution is calibrated
A certain amount of dilution is injected to simultaneously pumpback in mixing pond by peristaltic pump and connecting tube.System control suction needle after
The continuous liquid level that drops to records liquid level when peristaltic pump pumping liquid (i.e. stepper motor the step number walked) suction needle rising afterwards at the same time
To a high position.Inject the dilution of fixed volume.Suction needle declines detection liquid level and records the step number that stepper motor is walked again.Foundation
Data eliminate error twice, draw the relation of peristaltic pump dilution liquid flow and stepper motor, that is, draw the calibration results.
Peristaltic pump waste liquid is calibrated
It is similar to dilution cleaning solution calibration principle, change (liquid bulk according to stepper motor steps twice and liquid level
Product change), show that each step number of stepper motor corresponds to discharging of waste liquid flow, so as to reach the effect of waste liquid calibration.
It should be appreciated that described above, any those skilled in the art is disclosed in the utility model
In technical scope, the change or replacement that can readily occur in should be covered within the scope of the utility model.This practicality is new
The protection domain of type is subject to the protection domain of claims.
Claims (8)
1. a kind of peristaltic pump fluid path scaling system, it is characterised in that including stepper motor, peristaltic pump, mix pond, suction needle and control
Device processed；The stepper motor connects peristaltic pump, and peristaltic pump is used to convey liquid, and connecting tube is set on the mixing pond, described
The connecting tube in mixing pond be made of waste liquid outlet tube, cleaning solution inlet tube and dilution inlet tube, the waste liquid outlet tube position
In the mixing pond top, the cleaning solution inlet tube and dilution inlet tube are positioned at the mixing pond lower part, the peristaltic pump
It is connected by connecting tube with mixing pond, the suction needle connects level detection plate.
2. peristaltic pump fluid path scaling system according to claim 1, it is characterised in that the mixing pond intracavity bottom is
Conical bottom.
3. peristaltic pump fluid path scaling system according to claim 1, it is characterised in that the control device includes：
Main control unit, sends, main control unit sends stepper motor row to control unit for carrying out logical calculated and command signal
Into or stop signal, to communication unit send suction needle detectable signal, and receive communication unit transmission feedback signal；
Described control unit, for controlling stepper motor to advance and stopping；
Suction needle sampling unit, for controlling suction needle position and contacting alarm with liquid in suction needle；
Master control borad, receives the signal of communication unit and controls suction needle traveling and receive anti-during the alarm of suction needle sampling unit
Feedback signal.
4. peristaltic pump fluid path scaling system according to claim 3, it is characterised in that the logic meter of the main control unit
Calculate result and be delivered to display unit.
5. peristaltic pump fluid path scaling system according to claim 1, it is characterised in that further include power supply unit, the electricity
Source unit connects main control unit and control unit.
6. peristaltic pump fluid path scaling system according to claim 1, it is characterised in that the mixing pool volume is 2ml
±0.5ml。
7. peristaltic pump fluid path scaling system according to claim 1, it is characterised in that the connecting tube caliber is 2mm
±0.5mm。
8. peristaltic pump fluid path scaling system according to claim 1, it is characterised in that to be rectangular outside the mixing pond
Body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720893258.8U CN207297300U (en) | 2017-07-21 | 2017-07-21 | A kind of peristaltic pump fluid path scaling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720893258.8U CN207297300U (en) | 2017-07-21 | 2017-07-21 | A kind of peristaltic pump fluid path scaling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207297300U true CN207297300U (en) | 2018-05-01 |
Family
ID=62447389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720893258.8U Active CN207297300U (en) | 2017-07-21 | 2017-07-21 | A kind of peristaltic pump fluid path scaling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207297300U (en) |
-
2017
- 2017-07-21 CN CN201720893258.8U patent/CN207297300U/en active Active
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