A sample injection device for droplet chromatography detection

Abstract

The utility model provides a kind of sample introduction device for droplet chromatography detection, including workbench, the positioning table connected in workbench side, the conveying area at workbench, sample holder is placed at positioning table, the bearing groove for bearing sample bottle is equipped with several at the interval of sample holder, and driving seat is movably arranged at workbench, the jaw of telescopic setting is provided in driving seat side, to make jaw clamp sample bottle in corresponding bearing groove and move to conveying area;The utility model can automatically carry out sample bottle sampling of chromatography detection, avoid the pollution possibility of manual sampling, and when large quantities of sampling, can effectively improve sampling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chromatography, and in particular to an injection device for droplet chromatography detection. Background Technology

[0002] A liquid chromatograph is an instrument that uses the difference in the distribution ratio of a mixture between a liquid and a solid or between two immiscible liquids to separate the mixture first, and then analyze and identify it. When injecting liquid samples, the operator often uses a hand-held syringe or an automated mechanical injection method to pump the liquid into the injection port of the liquid chromatograph for injection.

[0003] Before the injection step, the sample vials containing the samples to be tested need to be injected into the system. This step is currently mostly done manually, where the operator manually removes the vials from the storage area and places them sequentially in the transport area, where they are then transported to the automated mechanical injection extraction device (manual injection extraction usually does not include this step, and manual injection is slow and is relatively rare). However, during the process of manually removing the vials and placing them in the transport area, there is a possibility of hand contact with the vial opening, increasing the risk of sample contamination (the extraction needle is usually used to puncture the vial opening for extraction), and manual injection is also slow. Utility Model Content

[0004] The purpose of this invention is to provide a sample injection device for droplet chromatography detection that can automatically perform chromatographic detection, avoid the possibility of contamination from manual sample injection, and effectively improve the injection efficiency when injecting large batches of samples.

[0005] To solve the above-mentioned technical problems, this utility model provides a sample injection device for droplet chromatography detection, including a worktable, a positioning stage connected to the side of the worktable, a conveying area located at the worktable, a sample rack placed at the positioning stage, a plurality of bearing grooves for bearing sample bottles spaced apart at the sample rack, and a drive seat movably provided at the worktable, the drive seat having telescopically provided grippers on its side, so that the grippers clamp the sample bottles in the corresponding bearing grooves and move them to the conveying area.

[0006] Furthermore, the sample holder has a groove on its side, which is located below several bearing grooves. The drive seat is connected to a control board that matches the groove, and the end of the control board has a first magnetic element. A second magnetic element that repels the first magnetic element is placed in the groove, so that when the magnetic force of the first magnetic element gradually increases, the second magnetic element drives the sample bottle to rise.

[0007] Furthermore, the gripper has a limiting plate at its top, and the limiting plate has an arrival detector.

[0008] Furthermore, the workbench is provided with a moving track, a moving plate is mounted in the moving track, a transverse track is connected to the moving plate, the drive seat is moved at the transverse track, and the transverse track is perpendicular to the moving track.

[0009] Furthermore, the positioning platform is provided with a first placement area and a second placement area. The projected area of ​​the first placement area is larger than the projected area of ​​the second placement area, and the first placement area and the second placement area are arranged in a stepped shape.

[0010] Furthermore, the positioning stage is provided with a pull-out base plate, which matches the second placement area so that when the sample holder is placed in the first placement area, the base plate is engaged in the second placement area.

[0011] Furthermore, the positioning stage and the worktable are detachably coupled.

[0012] Furthermore, the inner side of the gripper has an anti-slip pad.

[0013] Furthermore, the gripper side is connected to the drive seat via a telescopic rod.

[0014] The beneficial effects of this utility model are as follows: After the positioning stage is connected to the worktable, the sample rack containing the sample bottles is placed at the corresponding position on the positioning stage, so that several sample bottles can be stably placed on the upper part of the positioning stage. At this time, the drive seat drives the gripper to move towards the positioning stage, so that the gripper moves to the bearing groove where the sample bottle to be injected is located, and then the gripper clamps and removes the corresponding sample bottle and moves it to the conveying area, so as to transport the sample bottle to the subsequent extraction and injection equipment. Since the operator only contacts the sample rack during the injection process, direct contact with the bottle mouth is avoided. In addition, the automatic injection method of the gripper is also used during the sample bottle removal process. Therefore, the whole process can achieve pollution-free operation and simultaneously improve the efficiency of large-batch injection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a side view of the present invention.

[0017] Figure 3 This is a utility model Figure 2 Cross-sectional view along line AA.

[0018] Figure 4 This is a utility model Figure 3 A magnified view of a portion of point A in the middle.

[0019] Figure 5 This is a utility model Figure 3 A magnified view of a section at point B.

[0020] Reference numerals: 1. Workbench; 2. Positioning stage; 3. Conveying area; 4. Sample rack; 5. Bearing groove; 6. Drive seat; 7. Gripper; 8. Groove; 9. Control panel; 10. First magnetic component; 11. Second magnetic component; 12. Limiting plate; 13. Position detector; 14. Moving track; 15. Moving plate; 16. Transverse track; 17. First placement area; 18. Second placement area; 19. Base plate; 20. Anti-slip pad; 21. Telescopic rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0022] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0023] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0024] like Figures 1-5 The present invention provides a sample injection device for droplet chromatography detection, including a worktable 1, a positioning stage 2 connected to the side of the worktable 1, a conveying area 3 located at the worktable 1, a sample rack 4 placed at the positioning stage 2, a plurality of bearing grooves 5 for bearing sample bottles spaced apart at the sample rack 4, and a drive seat 6 movably arranged at the worktable 1, the drive seat 6 having telescopically arranged grippers 7 on its side, so that the grippers 7 clamp the sample bottles in the corresponding bearing grooves 5 and move them to the conveying area 3.

[0025] After the positioning stage is connected to the worktable, the sample rack containing the sample vials is placed in the corresponding position on the positioning stage, so that several sample vials can be stably placed on the upper part of the positioning stage. At this time, the drive seat drives the gripper to move towards the positioning stage, so that the gripper moves to the carrier groove where the sample vial to be injected is located, and then the gripper clamps and removes the corresponding sample vial and moves it to the conveying area, so as to transport the sample vial to the subsequent extraction and injection equipment. Since the operator only contacts the sample rack during the injection process, avoiding direct contact with the sample vial mouth, and the automatic injection method of the gripper is also used during the sample vial removal process, the whole process can achieve pollution-free operation and simultaneously improve the efficiency of large-volume injection.

[0026] The conveying area can be equipped with conveyor belts, conveyor tracks and other devices to transport sample bottles to the next process, ensuring stable transport of sample bottles between different processes.

[0027] In one embodiment of this solution, the gripper may employ a hydraulically controlled gripper structure.

[0028] Preferably, the sample holder 4 has a groove 8 on its side, the groove 8 is located below a plurality of bearing grooves 5, the drive seat 6 is connected to a control plate 9 that matches the groove 8, and the control plate 9 has a first magnetic element 10 on its end side, and a second magnetic element 11 that repels the first magnetic element 10 is placed in the groove 8, so that when the magnetic force of the first magnetic element 10 gradually increases, the second magnetic element 11 drives the sample bottle to rise.

[0029] Specifically, when it is necessary to remove the sample bottle from the support slot, the drive unit synchronously moves the control board and the gripper to the upper and lower sides of the support slot respectively. Then, the first magnetic component generates a magnetic force that repels the second magnetic component. As the magnetic force of the first magnetic component gradually increases, it pushes the second magnetic component upward, thereby lifting the sample bottle to the gripping position of the gripper through the second magnetic component. Then, the gripper clamps and fixes the sample bottle, and the drive unit resets and moves, so that the sample bottle can be removed from the sample rack.

[0030] The first magnetic component uses an electromagnet, while the second uses a magnet. The magnetic strength generated by the first magnetic component is controlled by changing the current in the electromagnet, ensuring the sample bottle is lifted smoothly. The repulsive force between the electromagnet and the magnet precisely controls the lifting position of the sample bottle, ensuring proper gripping with the grippers. This eliminates the need for additional multi-axis equipment such as robotic arms to assist the grippers in removing the sample bottle from the support groove, thus reducing equipment costs.

[0031] Preferably, the gripper 7 has a limiting plate 12 at its top, and the limiting plate 12 has a positioning detector 13.

[0032] Specifically, the lifting height of the sample bottle is limited by the limiting plate to prevent the sample bottle from being lifted too high by the second magnetic component, which would cause the gripper's clamping position to become unstable. At the same time, when the sample bottle is lifted and contacts the limiting plate, the position detector can identify the position of the sample bottle and prompt the gripper to clamp and fix it, so as to ensure that the gripper stably clamps the sample bottle.

[0033] The positioning detector can be a photoelectric sensor, a proximity switch, or the like.

[0034] Preferably, the workbench 1 is provided with a moving track 14, a moving plate 15 is movably mounted in the moving track 14, a transverse track 16 is connected to the moving plate 15, the drive seat 6 is movably mounted at the transverse track 16, and the transverse track 16 is perpendicular to the moving track 14.

[0035] Specifically, since the sample holder has multiple support slots, in order to ensure that the grippers can accurately hold the sample bottles in the corresponding support slots, a moving track and a transverse track are set up so that the drive seat can move laterally along the transverse track to switch to the corresponding positions of different support slots, and the moving plate moves along the moving track so that the transverse track drives the drive seat to move closer to the sample holder, ensuring that the gripper's gripping position is accurate.

[0036] The moving track and the traverse track can be electric tracks; the moving plate and the traverse track can be connected by bolts.

[0037] In one embodiment of this solution, the relative positions of the drive seat, gripper, and carrier groove can be adjusted by setting the distance the drive seat moves along the transverse track, thereby sequentially removing each sample bottle from one side of the sample rack to the other.

[0038] Preferably, the positioning platform 2 has a first placement area 17 and a second placement area 18. The projected area of ​​the first placement area 17 is larger than the projected area of ​​the second placement area 18, and the first placement area 17 and the second placement area 18 are arranged in a stepped shape.

[0039] Specifically, to accommodate different sample rack sizes, this solution sets up a first placement area and a second placement area. Larger sample racks are placed in the first placement area, and smaller sample racks are placed in the second placement area. The stepped design ensures that the second placement area can stably support the smaller sample racks.

[0040] It is worth mentioning that, since the first and second placement areas are set in a stepped manner, in order to ensure the stable use of the control board and grippers, the height of the small sample holder needs to be higher than that of the large sample holder, and the position of the groove should also be set higher than that of the groove in the large sample holder, so as to ensure that the control board and grippers will not fail to move to the corresponding position accurately due to the height difference during operation.

[0041] Preferably, the positioning stage 2 is provided with a pull-out base plate 19 on its side, and the base plate 19 matches the second placement area 18 so that when the sample holder 4 is placed in the first placement area 17, the base plate 19 is engaged in the second placement area 18.

[0042] Specifically, when positioning the large sample holder in the first placement area, the base plate can be pulled out and placed in the first placement area, so that the base plate fills the recessed position of the first placement area, thereby ensuring the flatness of the first placement area during use and ensuring the stable placement of the sample holder.

[0043] Preferably, the positioning stage 2 and the worktable 1 are detachably connected so that the positioning stage can be adapted to different sample holders.

[0044] In one embodiment of this solution, the positioning stage and the worktable can be quickly assembled and disassembled through a snap-fit ​​connection.

[0045] Preferably, the inner side of the gripper 7 has an anti-slip pad 20, so that the stability of the sample bottle can be improved by the anti-slip pad when the gripper holds the sample bottle.

[0046] The anti-slip mat can be made of rubber.

[0047] Preferably, the gripper 7 is connected to the drive seat 6 via a telescopic rod 21.

[0048] Specifically, after the gripper holds the sample bottle, the drive unit moves the control board and gripper to reset. At this time, the telescopic rod extends, causing the gripper to move away from the space above the control board. This allows the gripper to remain above the conveying area even after the control board moves away from the conveying area. This allows the conveying device in the conveying area to work with the gripper to accurately convey the sample bottle. After the sample bottle is placed in the conveying device, the telescopic rod retracts, causing the gripper to disengage from the sample bottle position.

[0049] In one embodiment of this solution, the telescopic rod can be hydraulically controlled.

[0050] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A sample injection device for droplet chromatography detection, characterized in that: The system includes a workbench (1), a positioning platform (2) connected to the side of the workbench (1), and a conveying area (3) located on the workbench (1). A sample rack (4) is placed on the positioning platform (2). The sample rack (4) is provided with several carrier grooves (5) spaced apart for carrying sample bottles. A drive seat (6) is movably provided on the workbench (1). The drive seat (6) has telescopic grippers (7) on its side so that the grippers (7) can clamp the sample bottles in the corresponding carrier grooves (5) and move them to the conveying area (3).

2. The sample injection device for droplet chromatography detection according to claim 1, characterized in that: The sample holder (4) has a groove (8) on its side, which is located below several bearing grooves (5). The drive seat (6) is connected to a control plate (9) that matches the groove (8) on its side, and the control plate (9) has a first magnetic element (10) on its end side. A second magnetic element (11) that repels the first magnetic element (10) is placed in the groove (8) so that when the magnetic force of the first magnetic element (10) gradually increases, the second magnetic element (11) drives the sample bottle to rise.

3. The sample injection device for droplet chromatography detection according to claim 1, characterized in that: The gripper (7) has a limiting plate (12) at its top, and the limiting plate (12) has a positioning detector (13).

4. The sample injection device for droplet chromatography detection according to claim 1, characterized in that: The workbench (1) is provided with a moving track (14), a moving plate (15) is movably mounted in the moving track (14), a transverse track (16) is connected to the moving plate (15), the drive seat (6) is movably mounted at the transverse track (16), and the transverse track (16) is perpendicular to the moving track (14).

5. The sample injection device for droplet chromatography detection according to claim 1, characterized in that: The positioning platform (2) has a first placement area (17) and a second placement area (18). The projected area of ​​the first placement area (17) is larger than the projected area of ​​the second placement area (18), and the first placement area (17) and the second placement area (18) are set in a stepped shape.

6. The sample injection device for droplet chromatography detection according to claim 5, characterized in that: The positioning platform (2) has a pull-out base plate (19) on its side. The base plate (19) matches the second placement area (18) so that when the sample holder (4) is placed in the first placement area (17), the base plate (19) is engaged in the second placement area (18).

7. The sample injection device for droplet chromatography detection according to claim 1, characterized in that: The positioning stage (2) and the worktable (1) are detachably connected.

8. The sample injection device for droplet chromatography detection according to claim 1, characterized in that: The gripper (7) has an anti-slip pad (20) on its inner side.

9. The sample injection device for droplet chromatography detection according to claim 1, characterized in that: The gripper (7) is connected to the drive seat (6) via a telescopic rod (21) on its side.

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