CN219104837U

CN219104837U - Liquid chromatograph

Info

Publication number: CN219104837U
Application number: CN202320009315.7U
Authority: CN
Inventors: 卫宏远; 党乐平
Original assignee: Tianjin Tianda Saida Collaborative Innovation Technology Research Institute Co ltd
Current assignee: Tianjin Tianda Saida Collaborative Innovation Technology Research Institute Co ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-05-30
Anticipated expiration: 2033-01-04

Abstract

The utility model provides a liquid chromatograph, which comprises a sample injector, wherein the sample injector comprises a sample injection bin, the sample injection bin is arranged in the sample injector, the sample injection bin comprises a sample injection frame, a positioning device is arranged between the sample injection frame and the sample injection bin, the positioning device comprises a shell, a limiting block, a limiting rod and at least one spring, at least one connecting column penetrating through the limiting plate is arranged on the limiting block, the spring is arranged between the limiting block and the shell, a limiting groove is arranged on the limiting block, the limiting groove is a closed annular groove, a sliding block sliding along the limiting groove is arranged on the limiting rod, the limiting rod is rotatably connected with the shell, and the sample injection frame is in butt joint with the connecting column. The utility model has the beneficial effects that: when an operator places the sample feeding frame, obvious feedback of the sample feeding frame placed in place can be obtained, the problem of frequent error reporting of the instrument is avoided, and the experimental efficiency is improved.

Description

Liquid chromatograph

Technical Field

The utility model belongs to the field of instrument analysis, and particularly relates to a liquid chromatograph.

Background

High performance liquid chromatography is an important branch of chromatography, liquid is taken as a mobile phase, a high pressure transfusion system is adopted, a single solvent with different polarities or a mixed solvent with different proportions, buffer solution and other mobile phases are pumped into a chromatographic column filled with a stationary phase, and after components in the column are separated, the components enter a detector for detection, so that analysis of a sample is realized. The high performance liquid chromatograph mainly comprises a high pressure infusion pump, a sample injector, a temperature control system, a chromatographic column, a detector, a signal recording system and the like. In the prior art, a part of chromatographs adopt a trigger type induction system, and when the chromatograph self-tests, the chromatograph detects that the device is not installed in place, the chromatograph stops working and reports errors to remind operators. However, operators cannot obtain explicit feedback in the process of placing the sample feeding frame to determine whether the sample feeding frame is installed in place, and a phenomenon of reporting errors together often occurs to influence operation.

Disclosure of Invention

In view of the above, the present utility model aims to provide a liquid chromatograph, which solves the problem that the sample injection rack is not placed in place and the instrument is frequently misplaced in the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a liquid chromatograph, includes the sample injector, the sample injector includes advances a sample storehouse, advance the sample storehouse and locate in the sample injector, advance the sample storehouse and include advance a frame, advance a frame and advance a sample storehouse and dismantle the connection, advance and be equipped with positioner between frame and the sample storehouse, positioner includes casing, stopper, gag lever post, at least one spring, casing and advance a storehouse rigid coupling, the casing is equipped with the limiting plate, stopper and casing sliding connection, be equipped with at least one spliced pole that passes the limiting plate on the stopper, the spring is located between stopper and the casing, be equipped with the spacing groove on the stopper, the spacing groove is closed annular fluting, the spacing groove is equipped with two inflection points near limiting plate one side, the spacing groove is equipped with the limit point between two inflection points, the limiting plate is kept away from to the limit point for two inflection points, be equipped with on the gag lever post along the gliding slider of spacing groove, the gag lever post rotates with the casing to be connected, advance a frame and spliced pole butt.

Further, the connecting column and the sample feeding frame are correspondingly provided with magnetic attraction materials, so that the sample feeding frame is prevented from being ejected out by the positioning device.

Further, a handle is arranged on the sample injection frame, so that the sample injection frame is convenient to push and pull.

Further, the sample introduction bin is provided with a sliding rail, the sample introduction frame is provided with a corresponding slot, the sliding rail and the slot are both provided with chamfers, and the sample introduction frame is conveniently and rapidly inserted into the sample introduction bin.

Further, guide posts for fixing the springs are arranged on the shell and the limiting block.

Compared with the prior art, the liquid chromatograph provided by the utility model has the following advantages:

(1) According to the liquid chromatograph provided by the utility model, the positioning device is arranged, so that an operator can obtain obvious feedback of the sample injection frame in place when the sample injection frame is placed, the problem of frequent error reporting of the instrument is avoided, and the experimental efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a sample injection bin according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a cross-sectional structure of a sample injection bin according to an embodiment of the utility model;

FIG. 3 is a schematic cross-sectional view of a positioning device according to an embodiment of the present utility model;

fig. 4 is an exploded view of a positioning device according to an embodiment of the utility model.

Reference numerals illustrate:

1. a sample introduction bin; 2. a sample injection frame; 3. a positioning device; 4. a housing; 5. a limiting block; 6. a limit rod; 7. a spring; 8. a limiting plate; 9. a connecting column; 10. a limit groove; 11. a magnetic material; 12. a handle; 13. a slide rail; 14. slotting; 15. a guide post; 16. inflection points; 17. restriction sites; 18. a sliding block.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1-4, the liquid chromatograph of the present utility model comprises a sample injector, wherein the sample injector comprises a sample injection bin 1, and the sample injection bin 1 is arranged in the sample injector. The sample feeding bin 1 comprises a sample feeding frame 2, the sample feeding bin 1 is provided with a sliding rail 13, the sample feeding frame 2 is provided with a corresponding slot 14, the sliding rail 13 and the slot 14 are provided with chamfers, and the sample feeding frame 2 is conveniently and rapidly inserted into the sample feeding bin 1. The sample injection frame 2 is detachably connected with the sample injection bin 1, and a handle 12 is arranged on the sample injection frame 2. A positioning device 3 is arranged between the sample feeding frame 2 and the sample feeding bin 1, and the fixed end of the positioning device 3 is fixedly connected with the sample feeding bin 1. The positioning device 3 comprises a shell 4, a limiting block 5, a limiting

rod

6 and 2 springs 7. The casing 4 is equipped with limiting plate 8, limiting block 5 and casing 4 sliding connection are equipped with 2 through-holes that supply spliced pole 9 to pass on the limiting plate 8, are equipped with 2 spliced poles 9 that pass limiting plate 8 on the limiting block 5, all are equipped with the guide pillar 15 that is used for fixed spring 7 on casing 4 and the limiting block 5, and spring 7 locates between limiting block 5 and the casing 4. The limiting block 5 is provided with a limiting groove 10, the limiting groove 10 is an approximately heart-shaped groove, one side of the limiting groove 10, which is close to the limiting plate 8, is provided with two inflection points 16, the limiting groove 10 is provided with a limiting point 17 between the two inflection points 16, and the limiting point 17 is far away from the limiting plate 8 relative to the two inflection points 16. One end of the limiting rod 6 is provided with a sliding block 18 sliding along the limiting groove 10, the other end of the limiting rod 6 is rotationally connected with the shell 4, the sample injection frame 2 is abutted with the connecting column 9, and the connecting column 9 and the sample injection frame 2 are correspondingly provided with magnetic attraction materials 11.

The utility model relates to a liquid chromatograph using flow:

the sample feeding bottle is put into the sample feeding frame 2, the handle 12 is grasped, the sample feeding frame 2 is inserted into the sample feeding bin 1 along the sliding rail 13, the sample feeding frame 2 slides along the sliding rail 13 until being abutted with the connecting column 9, and the sample feeding frame 2 is magnetically attracted with the connecting column 9. Then, the sample injection frame 2 is pushed continuously to drive the connecting column 9 to shrink, the limiting block 5 slides in the shell 4 along with the connecting column 9, and meanwhile, the sliding block 18 on the limiting rod 6 slides along the limiting groove 10. When the sample injection device is pushed to the limit position, the sliding block 18 slides to any inflection point 16 to release the sample injection frame 2, the limiting block 5 slides in the opposite direction under the action of the spring 7, the sliding block 18 slides to the limiting point 17, the limiting rod 6 locks the limiting block 5, and the sample injection frame 2 is placed in place. After the experiment is finished, the sample injection frame 2 is pushed to drive the connecting column 9 to shrink, the limiting block 5 slides in the shell 4 along with the connecting column 9, and meanwhile, the sliding block 18 on the limiting rod 6 slides along the limiting groove 10. When the sample injection device is pushed to the limit position, the sliding block 18 slides to any inflection point 16, the sample injection frame 2 is released, the limiting block 5 slides in the opposite direction under the action of the spring 7, the sliding block 18 slides to one end of the limiting groove 10, which is far away from the limiting plate 8, and the limiting rod 6 releases the limiting block 5. Finally, the sample injection frame 2 is pulled out, and the sample injection bottle is taken out for cleaning.

Claims

1. A liquid chromatograph, characterized in that: including the injector, the injector includes advances the storehouse, advance the storehouse and locate in the injector, advance the storehouse and advance the frame including advancing, advance the frame and advance the storehouse and dismantle with advance and be connected, advance and be equipped with positioner between frame and the advance storehouse, positioner includes casing, stopper, gag lever post, at least one spring, casing and advance the storehouse rigid coupling, the casing is equipped with the limiting plate, stopper and casing sliding connection, be equipped with at least one spliced pole that passes the limiting plate on the stopper, the spring is located between stopper and the casing, be equipped with the spacing groove on the stopper, the spacing groove is closed annular fluting, the spacing groove is being close to limiting plate one side and is equipped with two inflection points, the spacing groove is equipped with the limit point between two inflection points, the limiting point is kept away from the limiting plate for two inflection points, be equipped with on the gag lever post along the gliding slider of spacing groove, the gag lever post rotates with the casing to be connected, advance frame and spliced pole butt.

2. A liquid chromatograph according to claim 1, characterized in that: and the connecting column and the sample injection frame are correspondingly provided with magnetic attraction materials.

3. A liquid chromatograph according to claim 1, characterized in that: and a handle is arranged on the sample feeding frame.

4. A liquid chromatograph according to claim 1, characterized in that: the sample introduction bin is provided with a sliding rail, the sample introduction frame is provided with a corresponding slot, and the sliding rail and the slot are provided with chamfers.

5. A liquid chromatograph according to claim 1, characterized in that: guide posts for fixing the springs are arranged on the shell and the limiting block.