CN212341128U - Liquid chromatograph sampling device - Google Patents
Liquid chromatograph sampling device Download PDFInfo
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- CN212341128U CN212341128U CN202020979671.8U CN202020979671U CN212341128U CN 212341128 U CN212341128 U CN 212341128U CN 202020979671 U CN202020979671 U CN 202020979671U CN 212341128 U CN212341128 U CN 212341128U
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Abstract
The utility model relates to a liquid chromatograph sampling device, include: the device comprises a closed annular sample inlet pipe, wherein the front and back symmetrical sides of the annular sample inlet pipe are respectively provided with a sample inlet and a sample outlet, the left and right sides of the annular sample inlet pipe are respectively provided with a left liquid cavity and a right liquid cavity, and the opposite sides of the left liquid cavity and the right liquid cavity are respectively and vertically provided with a left piston cavity and a right piston cavity which are respectively communicated with the left liquid cavity and the right liquid cavity, a left piston, a right piston, a left piston rod and a right piston rod; a cam driven by a motor is arranged between the left piston rod and the right piston rod, and a left piston and a right piston respectively reciprocate in a left piston cavity and a right piston cavity under the rotation of the cam; both ends are provided with the check valve respectively around left side sap cavity and the right sap cavity, and the check valve opens reverse closure towards the feed liquor direction, and the pulse of feed liquor is offset to the reciprocating type feed liquor structure of this scheme utilization circulation, thereby reduces the error that the feed liquor pulse caused.
Description
Technical Field
The utility model relates to a chromatograph field, concretely relates to liquid chromatograph sampling device.
Background
A chromatograph is an apparatus for performing chromatographic separation analysis. Comprises a sample introduction system, a detection system, a recording and data processing system, a temperature control system, a mobile phase control system and the like. Modern chromatographs have the characteristics of high stability, sensitivity, versatility, high degree of automation and the like. There are gas chromatography, liquid chromatography, gel chromatography, and the like. These chromatographs are widely used for analyzing a certain content of a chemical product or a polymer material, and gel chromatography can also measure the molecular weight and distribution of the polymer material.
In order to solve the problem, a damper is generally added at present, but the damper is affected by volume, and when the volume of liquid inlet exceeds the volume of the damper, the effect of the damper is ineffective.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a liquid chromatograph sampling device, utilize the reciprocating type feed liquor structure of circulation, realize that the pulse of feed liquor offsets to thereby reduce the error that the feed liquor pulse caused.
The purpose of the utility model is realized through the following technical scheme:
a kind of liquid chromatograph sampling device includes:
the device comprises a closed annular sample inlet pipe, wherein the front and back symmetrical sides of the annular sample inlet pipe are respectively provided with a sample inlet and a sample outlet, the sample inlet is used for inputting sample liquid, and the sample outlet is connected to a chromatographic column;
the left side and the right side of the annular sample inlet pipe are respectively provided with a left liquid cavity and a right liquid cavity, and the opposite sides of the left liquid cavity and the right liquid cavity are respectively and vertically provided with a left piston cavity and a right piston cavity which are respectively communicated with the left liquid cavity and the right liquid cavity;
the left piston cavity and the right piston cavity are respectively inserted into a left piston and a right piston, and the left piston and the right piston are respectively provided with a left piston rod and a right piston rod;
a cam driven by a motor is arranged between the left piston rod and the right piston rod, and return springs are respectively arranged between the left piston rod and the left piston cavity and between the right piston rod and the right piston cavity, so that the left piston and the right piston respectively reciprocate in the left piston cavity and the right piston cavity under the rotation of the cam;
the front end and the rear end of the left liquid cavity and the right liquid cavity are respectively provided with a check valve, and the check valves are opened and closed reversely towards the liquid inlet direction.
Compare with the structure that the tradition adopted the syringe, this scheme utilizes the reciprocal absorption of double piston to advance the appearance liquid, then forms a bilateral symmetry's play liquid structure, and two strands of play liquids are in a appearance mouth play and are assembled, thereby because its direction is in opposite directions each other, strike the feed liquor pulse under the elimination traditional mode each other, improve the analysis result.
Furthermore, the sample outlet and the sample outlet are arranged in the middle of the annular sample inlet pipe on the side where the sample outlet and the sample inlet are arranged. The design can ensure that left and right liquid discharge are symmetrical, so that the pulses of the liquid discharge are mutually offset.
Furthermore, the middle part of the annular sample inlet pipe at the side of the sample outlet is provided with a communicated mixing bin, an impeller is arranged in the mixing bin, and the sample outlet is arranged on the mixing bin. The mixing bin is designed to further eliminate pulse, the liquid outlet pulse is used to impact the impeller to rotate, and the impeller completely eliminates liquid inlet pulse in the rotating state.
Further, the annular sample injection pipe is rectangular or circular.
Furthermore, the left piston cavity and the right piston cavity are bilaterally symmetrical, the volumes of the left piston cavity and the right piston cavity are completely the same, and correspondingly, the lengths of the left piston rod and the right piston rod are the same, so that the liquid output of the left liquid cavity and the liquid output of the right liquid cavity are the same.
Furthermore, the sample inlet is arranged in the middle of the annular sample inlet pipe on the side where the sample inlet is located.
The utility model has the advantages that: compare with traditional mode, two piston reciprocating motion about the structure drive of this scheme utilization reset spring and cam realize the feed liquor respectively and go out the liquid, and two strands of play liquids are gathered at the play appearance mouth, thereby offset the influence that the feed liquor pulse caused each other and eliminate the pulse.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1, a sample introduction device for a liquid chromatograph includes a closed annular sample introduction tube 1, wherein the annular sample introduction tube 1 has a rectangular or circular shape, and as shown in fig. 1, the annular sample introduction tube 1 has a rectangular structure in this embodiment, and the structure of the annular sample introduction tube 1 must be completely symmetrical in front and back and left and right so as to ensure that the left and right parts are symmetrical to each other in a subsequent liquid discharge process and eliminate liquid discharge pulses. The front and back symmetrical sides of the annular sample inlet pipe 1 are respectively provided with a sample inlet 2 and a sample outlet 3, wherein the sample inlet 2 and the sample outlet 3 are respectively arranged in the middle of the annular sample inlet pipe 1 on the respective side. The sample inlet 2 is used for inputting sample liquid, namely is communicated with a solvent tank, and the sample outlet 3 is connected to the chromatographic column. The left side and the right side of the sample injection pipe 1 are respectively provided with a left liquid cavity 4 and a right liquid cavity 5, the structures of the liquid cavities 4 and the right liquid cavity 5 are bilaterally symmetrical, and the volumes are completely the same. The opposite sides of the left liquid cavity 4 and the right liquid cavity 5 are respectively and vertically provided with a left piston cavity 41 and a right piston cavity 51 which are respectively communicated with the left liquid cavity and the right liquid cavity; the left piston cavity 41 and the right piston cavity 51 are respectively inserted into the left piston 6 and the right piston 7, and the left piston 6 and the right piston 7 are respectively provided with a left piston rod 61 and a right piston rod 71; a cam 9 driven by a motor is arranged between the left piston rod 61 and the right piston rod 71, and return springs 12 are respectively arranged between the left piston rod 61 and the left piston cavity 41 and between the right piston rod 71 and the right piston cavity 51, so that under the rotation of the cam 9, the left piston 6 and the right piston 7 respectively reciprocate in the left piston cavity 41 and the right piston cavity 51; the left piston rod 61 and the right piston rod 71 are the same in length, so that the liquid output amounts of the left liquid cavity 4 and the right liquid cavity 5 are the same. Both ends are provided with check valve 13 respectively around left side sap cavity 4 and right sap cavity 5, and check valve 13 opens reverse closure towards the inlet liquid direction for the piston withdraws from the in-process, and check valve 13 is opened and is drawn sample liquid from the solvent groove, and the piston pushes in-process check valve 13 and closes, sends into the chromatographic column with sample liquid through outlet 3.
On the other hand, in order to further eliminate the sampling pulse of the chromatographic column, the middle part of the annular sampling tube 1 on the side of the sample outlet 3 is provided with a communicated mixing bin 10, an impeller 11 is arranged in the mixing bin 10, the sample outlet 3 is arranged on the mixing bin 10, the pulse is completely eliminated through the rotation of the impeller, and then the pulse is sent into the chromatographic column at a constant speed.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (6)
1. The utility model provides a liquid chromatograph sampling device which characterized in that includes:
the device comprises a closed annular sample inlet pipe (1), wherein the front and back symmetrical sides of the annular sample inlet pipe (1) are respectively provided with a sample inlet (2) and a sample outlet (3), the sample inlet (2) is used for inputting sample liquid, and the sample outlet (3) is connected to a chromatographic column;
the left side and the right side of the annular sample inlet pipe (1) are respectively provided with a left liquid cavity (4) and a right liquid cavity (5), and the opposite sides of the left liquid cavity (4) and the right liquid cavity (5) are respectively and vertically provided with a left piston cavity (41) and a right piston cavity (51) which are respectively communicated with each other;
the left piston cavity (41) and the right piston cavity (51) are respectively inserted into a left piston (6) and a right piston (7), and the left piston (6) and the right piston (7) are respectively provided with a left piston rod (61) and a right piston rod (71);
a cam (9) driven by a motor is arranged between the left piston rod (61) and the right piston rod (71), and return springs (12) are respectively arranged between the left piston rod (61) and the left piston cavity (41) and between the right piston rod (71) and the right piston cavity (51), so that a left piston (6) and a right piston (7) respectively reciprocate in the left piston cavity (41) and the right piston cavity (51) when the cam (9) rotates;
the front end and the rear end of the left liquid cavity (4) and the right liquid cavity (5) are respectively provided with a check valve (13), and the check valves (13) are opened towards the liquid inlet direction and are closed reversely.
2. The sample injection device for the liquid chromatograph according to claim 1, wherein the sample outlet (3) and the sample inlet (2) and the sample outlet (3) are arranged in the middle of the annular sample injection tube (1) on the side where the sample injection device is arranged.
3. The sample introduction device for the liquid chromatograph according to claim 2, wherein a conducting mixing bin (10) is arranged in the middle of the annular sample introduction pipe (1) on the side of the sample outlet (3), an impeller (11) is arranged in the mixing bin (10), and the sample outlet (3) is arranged on the mixing bin (10).
4. The sample introduction device for liquid chromatograph according to claim 1, wherein the ring-shaped sample introduction tube (1) is rectangular or circular.
5. The sample injection device for liquid chromatograph according to claim 1, wherein the left piston cavity (41) and the right piston cavity (51) are symmetric left and right, and have the same volume, and correspondingly, the length of the left piston rod (61) and the length of the right piston rod (71) are the same, so that the liquid output of the left liquid cavity (4) and the liquid output of the right liquid cavity (5) are the same.
6. The sample injection device for liquid chromatograph according to claim 1, wherein the sample injection port (2) is arranged in the middle of the side annular sample injection tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020979671.8U CN212341128U (en) | 2020-06-02 | 2020-06-02 | Liquid chromatograph sampling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020979671.8U CN212341128U (en) | 2020-06-02 | 2020-06-02 | Liquid chromatograph sampling device |
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| CN212341128U true CN212341128U (en) | 2021-01-12 |
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| CN202020979671.8U Active CN212341128U (en) | 2020-06-02 | 2020-06-02 | Liquid chromatograph sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002047A (en) * | 2021-11-02 | 2022-02-01 | 湖北中烟工业有限责任公司 | Tobacco product aerosol condensation, trapping and extraction device and trapping and extraction method |
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2020
- 2020-06-02 CN CN202020979671.8U patent/CN212341128U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002047A (en) * | 2021-11-02 | 2022-02-01 | 湖北中烟工业有限责任公司 | Tobacco product aerosol condensation, trapping and extraction device and trapping and extraction method |
| CN114002047B (en) * | 2021-11-02 | 2024-04-12 | 湖北中烟工业有限责任公司 | Tobacco product aerosol condensation trapping extraction device and trapping extraction method |
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