CN207168791U - A kind of liquid difference reverse-flow type syringe pump - Google Patents
A kind of liquid difference reverse-flow type syringe pump Download PDFInfo
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- CN207168791U CN207168791U CN201720139637.8U CN201720139637U CN207168791U CN 207168791 U CN207168791 U CN 207168791U CN 201720139637 U CN201720139637 U CN 201720139637U CN 207168791 U CN207168791 U CN 207168791U
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- sample introduction
- introduction needle
- size sample
- syringe
- liquid
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Abstract
The utility model discloses a kind of liquid difference reverse-flow type syringe pump, including drive screw, driving sliding block is driven by drive screw, piston one end of two sample introduction needle injections of different sizes is individually fixed in above-mentioned driving sliding block both sides, the piston other end of above-mentioned two sample introduction needle injection is stretched into sample introduction needle injection cavity, the liquid outlet of two sample introduction needle cavitys is connected with infusion tube respectively, drive screw band movable slider moves to big sample introduction needle injection direction to be forced the fluid into infusion tube, at the same time small sample introduction needle syringe cavity produces negative pressure by the liquid of certain volume by realizing that micro liquid flows out from drain pipe in infusion tube house steward press-in return duct.The sample introduction needle syringe diameter size can adjust, realize different liquids volume backflow and micro liquid go out stream.Described two sample introduction needle syringe diameters of different sizes differ smaller, and capacity of returns is bigger, and final outflow is smaller.
Description
Technical field
It the utility model is related to micro-injection field, more particularly to a kind of liquid difference reverse-flow type syringe pump.
Background technology
With the development of technology, people are increasing to the cognitive need of microcosmos, and micro-injection pump is widely used in
Medication injections field, it is that micro-injection instrument is commonly used in clinical treatment and life science, while is also applied to chemistry
The injection field of material, it is widely used in various chemical engineering experiments, detection and precision chemical experiment etc..The system hair of micro-injection pump
Go out to control pulse to rotate stepper motor, drive screw mandrel rotation by power of stepper motor, screw mandrel drives pushing away on transmission nut
Head moves along a straight line, and so as to which pushing syringe piston linear moves, liquid in syringe is flowed in one direction, liquid pushes away
Enter speed can by set the rotation i.e. motor of screw rod to pulse adjust, it is so as to adjust liquid output amount, same with this
When the liquid output accuracy in the range of rate adaptation can also be ensured by speed measure feedback system.It is existing both at home and abroad at present
Most of study limitations to micro-injection pump are in the circuit control to pumping system, and the outside mechanical structure such as motor, screw mandrel
The research of efficiency and precision, the rare difficulty that syringe pump precision controlling is reduced from external structure and injecting method.
Utility model content
For above-mentioned deficiency, the utility model provides a kind of liquid difference reverse-flow type syringe pump, and the utility model utilizes a kind of liquid
The method of poor reverse-flow type syringe pump improves the external structure of syringe pump, realizes the simplest mode of more micro feed liquor in the prior art
It is the diameter for reducing sample introduction needle injection, so as to realize the difficulty for reducing syringe pump precision controlling, but sample introduction needle syringe diameter
More little makings are more difficult, cost is also higher, lift the control accuracy of stepper motor and the mechanical efficiency of screw mandrel in prior art
On the basis of the difficulty realized, the utility model, which realizes, to be realized on the basis of existing syringe pump precision and reduces ejection of syringe pump
Magnitude.
To achieve the above object, the utility model provides following technical scheme：A kind of liquid difference reverse-flow type syringe pump, it is special
Sign is, including pedestal, large size sample introduction needle syringe cavity and small size sample introduction needle syringe cavity, the large size sample introduction needle injection
Device cavity and small size sample introduction needle syringe cavity are fixed on pedestal by fixed block, and driving silk is hinged between fixed block
Bar, driving sliding block, driving sliding block and drive screw engaged transmission are arranged with drive screw, is fixedly connected between fixed block
Determine slide bar, fixed slip bar is provided with large size sample introduction needle syringe piston through sliding block is driven in large size sample introduction needle syringe cavity body,
Small size sample introduction needle syringe piston is provided with small size sample introduction needle syringe cavity body, large size sample introduction needle syringe piston and trumpet enter
Sample needle injection piston is fixedly linked with driving sliding block, large size sample introduction needle syringe cavity and small size sample introduction needle syringe cavity
It is connected by infusion tube, the infusion tube is by go out liquid house steward, return duct and goes out liquid and be in charge of to form, go out liquid house steward, return duct
With go out liquid and be in charge of to be connected at one.
Further, the go out liquid house steward, return duct and go out liquid and be in charge of T-shaped distribution, go out liquid house steward and return duct are one
On bar pipeline.
The beneficial effects of the utility model are：The utility model is simple in construction can be achieved to overcome current circuit control and
The bottleneck of the outside mechanical structure efficiency and precision lift technique such as motor, screw mandrel, on the basis of existing micro-injection pump precision
A kind of method for reducing syringe pump transfusion magnitude is provided, because the utility model makes easily and can reduce existing syringe pump
The difficulty of micro-injection precision techniques lifting, realizes injecting fluid, product of the present utility model can be wide on the basis of existing precision
The general difficulty controlled with micro feed liquor in a variety of syringe pumps, is reduced.
Brief description of the drawings
Next specific embodiment of the utility model will be described in further detail with reference to accompanying drawing, wherein：
Fig. 1 is the connection diagram of liquid difference reverse-flow type syringe pump；
The schematic diagram that liquid flows in infusion tube when Fig. 2 is liquid difference reverse-flow type injection pump work；
In figure：1st, large size sample introduction needle syringe cavity；2nd, large size sample introduction needle syringe piston；3rd, small size sample introduction needle injection
Cavity；4th, small size sample introduction needle syringe piston；5th, sliding block is driven；6th, drive screw；7th, fixed slip bar；8th, infusion tube；801、
Go out liquid house steward；802nd, return duct；803rd, go out liquid to be in charge of；9th, pedestal；10th, fixed block.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
Fig. 1 show one embodiment of the present utility model, and this structure is applied in existing syringe pump ex-ternal transmission mechanism,
Drive screw 6 is connected with motor, and driving sliding block 5 is driven by the above-mentioned drive screw 6 of motor driven, large size sample introduction needle syringe cavity
1 and small size sample introduction needle syringe cavity 3 be fixed on by fixed block 10 on pedestal 9, driving silk is hinged between fixed block 10
Bar 6, is arranged with driving sliding block 5, driving sliding block 5 and the engaged transmission of drive screw 6 in drive screw 6, fixed between fixed block 10
Fixed slip bar 7 is connected with, fixed slip bar 7 is provided with large size sample introduction through sliding block 5 is driven in large size sample introduction needle syringe cavity 1
Needle injection piston 2, small size sample introduction needle syringe piston 4, large size sample introduction needle note are provided with small size sample introduction needle syringe cavity 3
Emitter piston 2 and small size sample introduction needle syringe piston 4 are fixedly linked with driving sliding block 5, the He of large size sample introduction needle syringe cavity 1
Small size sample introduction needle syringe cavity 3 is connected by infusion tube 8, and the infusion tube 8 is by go out liquid house steward 801, the and of return duct 802
Go out liquid and be in charge of 803 compositions, go out liquid house steward 801, return duct 802 and go out liquid and be in charge of 803 to be connected at one, T-shaped distribution, it is total to go out liquid
Pipe 801 and return duct 802 are on a pipeline.
The utility model is illustrated with reference to Fig. 1 Fig. 2, motor driven drive screw 6 is moved, and drive screw 6, which drives, drives
Movable slider 5 drives the piston 2 of large size sample introduction needle injection to be injected to left movement, micro liquid by large size sample introduction needle to left movement
The exit of device cavity 1 enters infusion tube 8, at the same time drives sliding block 5 to drive the piston 4 of small size sample introduction needle injection to the left
Same distance is moved, as shown in Fig. 2 the liquid extruded by large size sample introduction needle syringe cavity 1 enters go out liquid house steward 801, together
When trumpet sample introduction needle syringe cavity 3 in produce negative pressure partially liq be pressed into return duct 802, remaining micro liquid then enters
Go out liquid to be in charge of in 803, micro liquid is in charge of 803 outputs by going out liquid, realize out flow liquid body fluid difference backflow after micro liquid export
Function.
It is flow to have formula Q=0.785u × D, wherein Q in syringe pump, and u is linear velocity, and D is syringe internal diameter, this practicality
There is formula Q0=0.785u × (D12-D22) in new, large size sample introduction needle injection internal diameter is D12, small size sample introduction needle injection
Internal diameter is D22, and Q0 is significantly less than Q, realizes the function of micro-injection.
Embodiment 1：
In the present embodiment, the minimum 1 μm/min of resolution ratio is adjusted using syringe pump linear velocity, sample introduction needle specification of syringe is
Internal diameter 0.5mm, now the minimum discharge of syringe pump is 0.19625 μ L/min；After structure of the present utility model, large size sample introduction
Needle injection internal diameter is 0.8mm, and small size injection needle is 0.7m, on the premise of syringe pump control technology is constant, linear velocity regulation
Resolution ratio is still 1 μm/min, and now the minimum discharge of syringe pump is 0.11775 μ L/min, is the 60% of former injection volume, hence it is evident that small
In former syringe pump minimum discharge.
Embodiment 2：
In the present embodiment, it is minimum that resolution ratio is adjusted using syringe pump linear velocity:1 μm/min, sample introduction needle specification of syringe
For internal diameter 0.5mm, now the minimum discharge of syringe pump is 0.19625 μ L/min；After structure of the present utility model, large size enters
Sample needle injection internal diameter is 3mm, and small size injection needle is 2.96mm, and on the premise of syringe pump control technology is constant, linear velocity is adjusted
It is still 1 μm/min to save resolution ratio, and now the minimum discharge of syringe pump is 0.187144 μ L/min, and minimum reservoir quantity is penetrated less than original annotation
Pump minimum discharge.The effect of 0.5mm minor diameters can be equally realized with the sample introduction needle injection of major diameter.
Embodiment 3：
In the present embodiment, the minimum 0.5 μm/min of resolution ratio, sample introduction needle specification of syringe are adjusted using syringe pump linear velocity
For internal diameter 0.4mm, now the minimum discharge of syringe pump is 0.0628 μ L/min；After structure of the present utility model, large size enters
Sample needle injection internal diameter is 4mm, and small size injection needle is 3.98mm, and on the premise of syringe pump control technology is constant, linear velocity is adjusted
It is still 0.5 μm/min to save resolution ratio, and now the minimum discharge of syringe pump is 0.062643 μ L/min, and sample introduction needle syringe diameter is
10 times of original annotation emitter, minimum liquid outlet quantity is still slightly less than the liquid outlet quantity of original diameter.
Embodiment 4：
In the present embodiment, the minimum 0.5 μm/min of resolution ratio, sample introduction needle specification of syringe are adjusted using syringe pump linear velocity
For internal diameter 0.4mm, now the minimum discharge of syringe pump is 0.0628 μ L/min；After structure of the present utility model, large size enters
Sample needle injection internal diameter is 0.5mm, and small size injection needle is 0.45mm, on the premise of syringe pump control technology is constant, linear velocity
It is still 0.5 μm/min to adjust resolution ratio, and now the minimum discharge of syringe pump is 0.01864375 μ L/min, is former injection volume
29.7%, hence it is evident that less than former syringe pump minimum discharge.The diameter difference of two sample introduction needle injections is smaller, and outflow is trickleer.
The liquid difference reverse-flow type syringe pump that the utility model is proposed, there is the characteristics of simple and easy, it is not necessary to improving pump
The circuit control of system, and the outside mechanical structure efficiency and precision such as motor, screw mandrel do specific research.
Above-described embodiment is used for illustrating the utility model, rather than the utility model is limited, in this practicality
New spirit and any modifications and changes in scope of the claims, made to the utility model, both fall within this reality
With new protection domain.
Claims (2)
1. a kind of liquid difference reverse-flow type syringe pump, it is characterised in that including pedestal (9), large size sample introduction needle syringe cavity (1) and small
Number sample introduction needle syringe cavity (3), the large size sample introduction needle syringe cavity (1) and small size sample introduction needle syringe cavity (3) are equal
It is fixed on by fixed block (10) on pedestal (9), drive screw (6) is hinged between fixed block (10), drive screw covers on (6)
Provided with driving sliding block (5), driving sliding block (5) and drive screw (6) engaged transmission, fixed block are fixedly connected with fixation between (10)
Slide bar (7), for fixed slip bar (7) through driving sliding block (5), large size sample introduction needle syringe cavity (1) is interior to be provided with large size sample introduction needle
Syringe piston (2), small size sample introduction needle syringe cavity (3) is interior to be provided with small size sample introduction needle syringe piston (4), large size sample introduction
Needle injection piston (2) and small size sample introduction needle syringe piston (4) are fixedly linked with driving sliding block (5), large size sample introduction needle note
Emitter cavity (1) is connected with small size sample introduction needle syringe cavity (3) by infusion tube (8), and the infusion tube (8) is by going out liquid
House steward (801), return duct (802) and go out liquid and be in charge of (803) composition, go out liquid house steward (801), return duct (802) and go out liquid and be in charge of
(803) it is connected at one.
2. liquid difference reverse-flow type syringe pump according to claim 1, it is characterised in that the go out liquid house steward (801), return duct
(802) and go out liquid and be in charge of (803) T-shaped distribution, go out liquid house steward (801) and return duct (802) are on a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139637.8U CN207168791U (en) | 2017-02-16 | 2017-02-16 | A kind of liquid difference reverse-flow type syringe pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139637.8U CN207168791U (en) | 2017-02-16 | 2017-02-16 | A kind of liquid difference reverse-flow type syringe pump |
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| Publication Number | Publication Date |
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| CN207168791U true CN207168791U (en) | 2018-04-03 |
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ID=61732796
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720139637.8U Active CN207168791U (en) | 2017-02-16 | 2017-02-16 | A kind of liquid difference reverse-flow type syringe pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106880892A (en) * | 2017-02-16 | 2017-06-23 | 中国计量大学 | Liquid difference reverse-flow type syringe pump |
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2017
- 2017-02-16 CN CN201720139637.8U patent/CN207168791U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106880892A (en) * | 2017-02-16 | 2017-06-23 | 中国计量大学 | Liquid difference reverse-flow type syringe pump |
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