CN203881789U - Precise injection pump - Google Patents
Precise injection pump Download PDFInfo
- Publication number
- CN203881789U CN203881789U CN201420183786.0U CN201420183786U CN203881789U CN 203881789 U CN203881789 U CN 203881789U CN 201420183786 U CN201420183786 U CN 201420183786U CN 203881789 U CN203881789 U CN 203881789U
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- CN
- China
- Prior art keywords
- nut
- injection pump
- screw rod
- precise injection
- screw mandrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a precise injection pump for precise and quantitative sample injection of reagents for chemical analysis. The precise injection pump comprises a pump body, a stepping motor, a photoelectric switch and a transmission mechanism, wherein the transmission mechanism consists of a screw rod and a nut which are matched with each other by threads; the screw rod can be connected with the stepping motor by a coupler and rotates along with the stepping motor, and the nut is fixed on a bracket which can move along the screw rod; the outer end of a piston rod of the needle-drum type pump body and the nut are fixed on the same bracket; the two sides of the screw rod are provided with a pair of horizontal sliding columns which are parallel to the screw rod; the bracket is also movably connected with the two horizontal sliding columns and can slide along the horizontal sliding columns; a positioning pin at the lower end of the bracket serves as a triggering mechanism of the photoelectric switch. The precise injection pump has the advantages that a piston is driven by the motor to do reciprocating movement so as to realize sample injection, the rotary movement of the motor is converted into the linear movement of the nut by adopting a screw rod and nut transmission mode, and accurate and trace sample injection can be realized by electric control; the structure is simple, the transmission is stable, the control is convenient and the sample-injection accuracy is high.
Description
Technical field
The utility model relates to a kind of precise injection pump, notes the utensil of sample for the precise quantitative of chemical analysis reagent.
Background technology
In chemical analysis experiment and some sample detection, often need relate to liquid reagent sample introduction, the different samples of identical product all complete detection by specific analytical instrument under identical conditions, under the constant prerequisite of other condition, each sample size that detects must be accurately consistent, just can guarantee the accuracy of testing result.At present, the input mode of chemical analysis instrument mainly contains manual sample introduction, peristaltic pump sample introduction, integrated screw mandrel stepper motor syringe pump sample introduction.Wherein manual sample introduction mostly is the sample introduction of Laboratory Instruments, Fast Measurement instrument, efficiency is low, low precision, be affected by human factors large; Peristaltic pump sample introduction is to push pump line by multiple roller orders to complete reagent sample introduction, for automatic sampling device, volume is little, simple to operate, but minimum sampling volume is determined by the pump tube length between adjacent two rollers, cause sample introduction play, be not suitable for micro-accurate measurement, easily corrosion is rotten for pump line contact reagent, easily follow the string in squeezed state for a long time, need to regularly replace pump line.
Summary of the invention
The purpose of this utility model is to provide a kind of stable drive, measures accurately, controls precise injection pump easily.
This precise injection pump comprises the gear train that the pump housing 2, stepper motor 4, optoelectronic switch 13 and the screw mandrel 8 matching with screw thread and nut 9 form, wherein screw mandrel 8 can be connected with stepper motor 4 by joint control 10 and rotation thereupon, and nut 6 is fixed on a support 5 that can move along screw mandrel 8; The described pump housing 2 is syringe type structure, the outer end of the piston rod 2-1 of the pump housing 2 and described nut 6 are fixed on same support 5, the both sides of screw mandrel 8 are provided with parallel with it a pair of horizontal traveller 16, and described support 5 is flexibly connected with two horizontal travellers 16 simultaneously, and can slide along horizontal traveller 16; The register pin 15 as the trigger mechanism of optoelectronic switch 13 is equipped with in described support 5 lower ends.
The described syringe type pump housing 2 is arranged on an erecting bed 7 by the fixing also level of a pair of syringe briquetting 3, and the two ends of described horizontal traveller 16 are separately fixed on the left riser 11-1 and right riser 11-2 of erecting bed 7; Described erecting bed 7 is provided with orbit hole 7-1, and support 5 upper ends pass from orbit hole 7-1, and can in orbit hole 7-1, move horizontally.
The lower end of described left and right two risers is connected with a switch base 9, and optoelectronic switch 13 is arranged on switch base 9, and switch base 9 is provided with orbit hole 9-1, and the lower end of register pin 15 passes and can in hole, move horizontally from this orbit hole 9-1.
Between described support 5 and two horizontal travellers 16, be equipped with oilless bearing 14, oilless bearing 14 is enclosed within outside horizontal traveller 16.
The a pair of horizontal traveller 16 of described screw mandrel both sides is positioned on left riser 11-1 and right riser 11-2 by flange bearing 12 respectively.
This syringe pump sample introduction is realized sample introduction by driven by motor piston reciprocates, adopt screw nut driving mode rotatablely moving of motor to be converted into the rectilinear motion of nut, sample introduction precision is determined by the pitch of screw mandrel and the step angle of motor, can realize accurate micro-sampling through electrical control.This injecting pump structure is simple, stable drive, and negative pressure draft is strong, and failure rate is low is controlled convenience, sample introduction precision and consistance good.
Brief description of the drawings
Fig. 1 is the utility model precise injection pump structure schematic diagram.
Fig. 2 is the A-A cut-open view of Fig. 1.
In figure, 1-Media Interface Connector, 2-pump housing, 2-1-piston rod, 3-syringe briquetting, 4-stepper motor, 5-support, 6-nut, 7-erecting bed, 7-1-orbit hole (support), 8-screw mandrel, 9-switch base, 9-1-orbit hole (register pin), 10-joint control, 11-1-left riser, 11-2-right riser, 12-flange bearing, 13-optoelectronic switch, 14-oilless bearing, 15-register pin, 16-horizontal traveller.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As Fig. 1, this precise injection pump is syringe type structure, moves and suck or output medium from Media Interface Connector 1 by piston in syringe.This pump is using the screw mandrel 8 of threaded engagement and nut 6 as gear train, and the two ends of screw mandrel 8 are positioned on left riser 11-1 and right riser 11-2 by flange bearing 12.The pump housing 2 is arranged on an erecting bed 7 by the fixing also level of syringe briquetting 3; The both sides of screw mandrel 8 are provided with parallel with it a pair of horizontal traveller 16(and see Fig. 2), piston rod 2-1 pays with nut and two horizontal travellers 16 are connected with same support 5, between support 5 and two horizontal travellers 16, is equipped with oilless bearing 14.In the time that screw mandrel 8 rotates with stepper motor 4 shaft couplings by joint control 10 thereupon, nut 6 moves linearly and drives support 5 along two horizontal traveller 16 synchronous slides along the axial generation of screw mandrel 8, and the piston rod 2-1 of support 5 upper ends is pulled outwardly moving thereupon or inwardly advances.Erecting bed 7 is provided with orbit hole 7-1, passes and can in hole, move for support 5 upper ends from hole, and switch base 9 is provided with orbit hole 9-1, passes and can in hole, move for register pin 15 lower ends from hole.
Driver receives the sense of rotation of outside direction control signal control step motor 4, and stepper motor 4 sense of rotation have determined piston advancing or retreating in the pump housing 2 simultaneously, realize extraction or the promotion of injector.
Support 5 lower ends are synchronized with the movement with support 5 as the register pin 15 of trigger element, trigger optoelectronic switch 13 signal that puts in place by register pin 15, realize the control of syringe pump upper limit position.Its lower position can be controlled by setting stepper motor working time.
The single injection amount of this syringe pump can be set according to actual injection amount demand the working time of stepper motor, under the constant prerequisite of setting-up time, has good injection precision and consistance, reaches accurate measurement.
Syringe pump body can adopt glass and/or tetrafluoro anticorrosive, is applicable to strong acid and strong base environment.
Claims (5)
1. a precise injection pump, it is characterized in that comprising the gear train of the pump housing (2), stepper motor (4), optoelectronic switch (13) and the screw mandrel (8) matching with screw thread and nut (6) composition, described feed screw nut pays as gear train, wherein, screw mandrel (8) can be connected with stepper motor (4) by joint control (10) and rotation thereupon, and nut (6) is fixed on one can be along on the mobile support (5) of screw mandrel (8); The described pump housing (2) is syringe type structure, the outer end of the piston rod (2-1) of the pump housing (2) and described nut (6) are fixed on same support (5), the both sides of screw mandrel (8) are provided with it parallel a pair of horizontal traveller (16), described support (5) is flexibly connected with two horizontal travellers (16) simultaneously, and can slide along horizontal traveller (16); The register pin (15) as the trigger mechanism of optoelectronic switch (13) is equipped with in described support (5) lower end.
2. precise injection pump according to claim 1, it is characterized in that the pump housing (2) is arranged on an erecting bed (7) by the fixing also level of a pair of syringe briquetting (3) upper, the two ends of described horizontal traveller (16) are separately fixed on the left riser (11-1) and right riser (11-2) of erecting bed (7); Described erecting bed (7) is provided with orbit hole (7-1), and support (5) upper end passes from orbit hole (7-1), and can in orbit hole (7-1), move horizontally.
3. precise injection pump according to claim 2, the lower end that it is characterized in that described left and right two risers is connected with a switch base (9), optoelectronic switch (13) is arranged on switch base (9), switch base (9) is provided with orbit hole (9-1), and the lower end of register pin (15) passes and can in hole, move horizontally from this orbit hole (9-1).
4. according to the precise injection pump described in claim 1 or 2 or 3, it is characterized in that being equipped with oilless bearing (14) between described support (5) and two horizontal travellers (16), oilless bearing (14) is enclosed within outside horizontal traveller (16).
5. precise injection pump according to claim 4, is characterized in that a pair of horizontal traveller (16) of described screw mandrel (8) both sides is positioned on left riser (11-1) and right riser (11-2) by flange bearing (12) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420183786.0U CN203881789U (en) | 2014-04-16 | 2014-04-16 | Precise injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420183786.0U CN203881789U (en) | 2014-04-16 | 2014-04-16 | Precise injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881789U true CN203881789U (en) | 2014-10-15 |
Family
ID=51682275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420183786.0U Expired - Fee Related CN203881789U (en) | 2014-04-16 | 2014-04-16 | Precise injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881789U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680203A (en) * | 2015-11-10 | 2017-05-17 | 中国科学院大连化学物理研究所 | Online microalgae automatic sampling optical measuring system |
| CN107754047A (en) * | 2016-08-15 | 2018-03-06 | 上海健康医学院 | A radioresistance intelligent accurate injector robot |
| CN107782872A (en) * | 2017-10-25 | 2018-03-09 | 中国矿业大学 | A kind of mechanical light sensation Combinational redundancy formula water quality monitor metering device |
| CN108957019A (en) * | 2017-05-17 | 2018-12-07 | 天津工业大学 | A kind of new automatic micro-sampling arm |
-
2014
- 2014-04-16 CN CN201420183786.0U patent/CN203881789U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680203A (en) * | 2015-11-10 | 2017-05-17 | 中国科学院大连化学物理研究所 | Online microalgae automatic sampling optical measuring system |
| CN107754047A (en) * | 2016-08-15 | 2018-03-06 | 上海健康医学院 | A radioresistance intelligent accurate injector robot |
| CN108957019A (en) * | 2017-05-17 | 2018-12-07 | 天津工业大学 | A kind of new automatic micro-sampling arm |
| CN107782872A (en) * | 2017-10-25 | 2018-03-09 | 中国矿业大学 | A kind of mechanical light sensation Combinational redundancy formula water quality monitor metering device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20170416 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |