CN201696242U - Double-plunger high-pressure infusion pump for liquid chromatograph - Google Patents
Double-plunger high-pressure infusion pump for liquid chromatograph Download PDFInfo
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- CN201696242U CN201696242U CN2010201665476U CN201020166547U CN201696242U CN 201696242 U CN201696242 U CN 201696242U CN 2010201665476 U CN2010201665476 U CN 2010201665476U CN 201020166547 U CN201020166547 U CN 201020166547U CN 201696242 U CN201696242 U CN 201696242U
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Abstract
The utility model discloses a double-plunger high-pressure infusion pump for a liquid chromatograph, which consists of a motor, a main cam, a sub cam, a main plunger, a sub plunger, a main pump cavity, a sub pump cavity and liquid discharge and sucking one-way valves, wherein the motor is connected with the main cam and the sub cam, the main cam is connected with the main plunger, the main pump cavity is arranged under the main plunger, the sub cam is connected with the sub plunger, the sub pump cavity is arranged under the sub plunger, the liquid discharge and sucking one-way valves are arranged on an inlet and outlet opening of the main pump cavity, and the volume ratio of the main pump cavity to the sub pump cavity is 2/1. When a main pump head of the utility model discharges liquid, 50 percent of liquid is input into a chromatographic system, the other 50 percent of liquid is accumulated by a sub pump head, and the sub pump head inputs the accumulated 50 percent of liquid into the chromatographic system again when the main pump head sucks the liquid. In addition, the system is only provided with two one-way valves, the failure occurrence probability is relatively low, the flow rate precision is improved, the pressure oscillation is correspondingly reduced, the solvent replacement is convenient, and the utility model is suitable for gradient elution.
Description
Technical field
The utility model relates to liquid chromatograph high pressure pump technical field, is meant a kind of liquid chromatograph double-plunger high pressure pump especially.
Background technique
Infusion pump in the liquid chromatograph is chromatographic core component, stability, repeatability and the precision of the direct impact analysis of high pressure pump performance.Along with efficient liquid phase chromatographic analysis in actual applications popularize and analyze the raising that requires, also more and more higher to performance demands such as the transfusion precision of high pressure liquid chromatography pump, pulsation.Liquid chromatography pump commonly used at present comprises that pneumatic amplification pump, reciprocating pump, spiral syringe pump, diaphragm pump etc. are several, because pneumatic amplification pump and spiral syringe pump exist Flow-rate adjustment inconvenience, solvent replacement difficulty, be unfavorable for carrying out shortcoming such as gradient elution, uses fewer and feweri.The machinery reciprocating pump is widely used in the liquid chromatogram instrument with advantages such as its stable performance, Flow-rate adjustment and solvent replacement convenience.The machinery reciprocating pump can be divided into reciprocating plunger pump and reciprocating diaphragm pump two classes, and the application of reciprocating plunger pump is relatively more general.Chinese patent (publication number: CN200975321Y) promptly disclose a kind of plunger-type structure of high pressure pump, by using a sphere sliding movement assembly, the rotation of stick harness center line is prolonged in realization, the radial motion of Vertical direction and inclination radially, guarantee under the bad situation of high pressure and low pressure seal circle concentricity, still can realize the offset correction of all directions automatically.This device has solved the problem that prior art exists to a certain extent, but still has the axial rotation difficulty of plunger axis, and ring wear causes situations such as leakage, influences the stable and precision of liquid chromatograph.
Summary of the invention
The purpose of this utility model is to provide a kind of and infuses steadily, adaptability is strong, noise is lower and the high pressure resistant life-span is long and liquid chromatograph easy to maintenance double-plunger high pressure pump.
For realizing the purpose of this utility model, intend by the following technical solutions:
A kind of liquid chromatograph double-plunger high pressure pump, form by motor, main cam, auxiliary cam, main plunger, subpost plug, main pump chamber, auxiliary pump chamber, row's imbibition one-way valve, it is characterized in that: described motor connects main cam and auxiliary cam, main cam connects main plunger, and the main pump chamber is set under the main plunger; Auxiliary cam auxiliary connection plunger is provided with the auxiliary pump chamber under the subpost plug; Row's imbibition one-way valve is arranged on the gateway in main pump chamber.
As preferably, the ratio of the volume in described main pump chamber and auxiliary pump chamber is: 2: 1.
Compared with prior art, during main pump head discharge opeing of the present utility model, 50% liquid is input in the chromatographic system, and other 50% liquid is accumulated by the auxiliary pump head, and when the imbibition of main pump head, the auxiliary pump head is imported former 50% liquid of accumulating in the chromatographic system again.And system only is provided with two one-way valves, and the chance that breaks down is less relatively, and flow accuracy improves, and pressure surge is also corresponding to be reduced, and it is convenient to change solvent, is suitable for gradient elution.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation.
Fig. 2 is model utility embodiment's an application system block diagram.
Label among the figure is: 1, motor; 2, main cam; 3, auxiliary cam; 4, main plunger; 5, subpost plug; 6, main pump chamber; 7, auxiliary pump chamber; 8, row's imbibition one-way valve.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
Fig. 1 has illustrated the utility model embodiment's structure, the utility model liquid chromatograph double-plunger high pressure pump, form by motor 1, main cam 2, auxiliary cam 3, main plunger 4, subpost plug 5, main pump chamber 6, auxiliary pump chamber 7, row's imbibition one-way valve 8, motor 1 connects main cam 2 and auxiliary cam 3, main cam 2 connects main plunger 4, and main plunger is provided with main pump chamber 64 times; Auxiliary cam 3 auxiliary connection plungers 5, the subpost plug is provided with auxiliary pump chamber 75 times; Row's imbibition one-way valve 8 is arranged on the gateway in main pump chamber 6.Wherein the ratio of the volume in main pump chamber 6 and auxiliary pump chamber 7 is: 2: 1.When the discharge opeing of main pump head, 50% liquid is input in the chromatographic system, and other 50% liquid is accumulated by the auxiliary pump head, and when the imbibition of main pump head, the auxiliary pump head is imported former 50% liquid of accumulating in the chromatographic system again.And system only is provided with two one-way valves, and the chance that breaks down is less relatively, and flow accuracy improves, and pressure surge is also corresponding to be reduced, and it is convenient to change solvent, is suitable for gradient elution.
Fig. 2 has illustrated application scheme of the present utility model, solvent in the solvent bottle is influenced with pressure stable output by one-way valve by infusion pump, measure by injector and chromatographic column with at the uniform velocity even, when arriving detector, because the control of the temperature of column oven, it is best that every experimental condition is arrived, and be transferred to the data processing work station with electrical signal and analyze, and on the LCD display system, showing test numerical value, excess liquid enters waste liquid bottle through the end of chromatographic column.
Claims (2)
1. liquid chromatograph double-plunger high pressure pump, form by motor, main cam, auxiliary cam, main plunger, subpost plug, main pump chamber, auxiliary pump chamber, row's imbibition one-way valve, it is characterized in that: described motor connects main cam and auxiliary cam, main cam connects main plunger, and the main pump chamber is set under the main plunger; Auxiliary cam auxiliary connection plunger is provided with the auxiliary pump chamber under the subpost plug; Row's imbibition one-way valve is arranged on the gateway in main pump chamber.
2. a kind of liquid chromatograph double-plunger high pressure pump according to claim 1 is characterized in that: the ratio of the volume in described main pump chamber and auxiliary pump chamber is: 2: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201665476U CN201696242U (en) | 2010-04-22 | 2010-04-22 | Double-plunger high-pressure infusion pump for liquid chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201665476U CN201696242U (en) | 2010-04-22 | 2010-04-22 | Double-plunger high-pressure infusion pump for liquid chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201696242U true CN201696242U (en) | 2011-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201665476U Expired - Fee Related CN201696242U (en) | 2010-04-22 | 2010-04-22 | Double-plunger high-pressure infusion pump for liquid chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201696242U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094777A (en) * | 2011-01-27 | 2011-06-15 | 北京清博华科技有限公司 | Plunger pump for preparing liquid chromatographic column |
| CN103869030A (en) * | 2012-12-18 | 2014-06-18 | 北京普源精电科技有限公司 | Liquid chromatograph having series-connection plunger pump and control method thereof |
| CN104101669A (en) * | 2013-04-10 | 2014-10-15 | 北京普源精电科技有限公司 | High performance liquid chromatograph used for control of system pressure pulsation |
| CN104101658A (en) * | 2013-04-10 | 2014-10-15 | 北京普源精电科技有限公司 | High performance liquid chromatograph controllable in flow velocity |
| CN107912000A (en) * | 2017-11-29 | 2018-04-13 | 北京百度网讯科技有限公司 | Cooling system |
| CN115166119A (en) * | 2022-06-30 | 2022-10-11 | 鲲鹏仪器(大连)有限公司 | High-precision low-pressure gradient method of high performance liquid chromatograph |
-
2010
- 2010-04-22 CN CN2010201665476U patent/CN201696242U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094777A (en) * | 2011-01-27 | 2011-06-15 | 北京清博华科技有限公司 | Plunger pump for preparing liquid chromatographic column |
| CN103869030A (en) * | 2012-12-18 | 2014-06-18 | 北京普源精电科技有限公司 | Liquid chromatograph having series-connection plunger pump and control method thereof |
| CN104101669A (en) * | 2013-04-10 | 2014-10-15 | 北京普源精电科技有限公司 | High performance liquid chromatograph used for control of system pressure pulsation |
| CN104101658A (en) * | 2013-04-10 | 2014-10-15 | 北京普源精电科技有限公司 | High performance liquid chromatograph controllable in flow velocity |
| CN104101669B (en) * | 2013-04-10 | 2017-11-28 | 北京普源精仪科技有限责任公司 | A kind of high performance liquid chromatograph for control system pressure fluctuation |
| CN104101658B (en) * | 2013-04-10 | 2018-04-24 | 苏州普源精电科技有限公司 | It is a kind of can be with the high performance liquid chromatograph of coutroi velocity |
| CN107912000A (en) * | 2017-11-29 | 2018-04-13 | 北京百度网讯科技有限公司 | Cooling system |
| CN115166119A (en) * | 2022-06-30 | 2022-10-11 | 鲲鹏仪器(大连)有限公司 | High-precision low-pressure gradient method of high performance liquid chromatograph |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20110422 |