Chromatography automatic sample injector

Abstract

The utility model relates to the technical field of chromatographic sample injection, and discloses a chromatographic automatic sample injector which comprises an operation table, two groups of sliding rails are arranged on the surface of the operation table, sliding blocks are connected in the two groups of sliding rails in a sliding mode, the tops of the two groups of sliding blocks are fixedly connected with fixed blocks, and the fixed blocks are connected with the sliding rails in a sliding mode. Mounting assemblies are fixedly connected to the two sides of the fixing block, and each of the two mounting assemblies comprises a mounting plate and a plurality of plug pins. According to the automatic chromatographic sample injector, through the arrangement of the positioning assembly, when the automatic chromatographic sample injector is used for sample injection, the positioning block is attached to the sample injection pipe, the sample injection needle moves, and the positioning block pushes the telescopic rod to move along with the movement of the sample injection needle, so that a sample can accurately enter a sample injection port of a chromatographic column in the sample injection process, and the sample injection error is reduced; the accuracy and repeatability of experimental results are guaranteed, meanwhile, the sample injector can be helped to be rapidly switched among multiple samples, the manual operation time is shortened, and possible human errors are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic injection, in particular to a chromatographic auto-sampler. Background Art

[0002] A chromatograph is a device for chromatographic separation analysis, including an injection system, a detection system, a recording and data processing system, etc., and has the characteristics of high stability, sensitivity, versatility, and automation. According to different detection objects, it is also divided into gas chromatographs, liquid chromatographs, gel chromatographs, etc., and is widely used in chemical products.

[0003] An auto-sampler for chromatographic experiments disclosed in the patent with the publication number CN209821137U includes a sample tray, an injection mechanism, a rotation mechanism for driving the rotation of the sample tray, and a lifting mechanism for driving the lifting of the injection mechanism; a plurality of sample storage devices and a cleaning pool are provided on the outer circle of the sample tray, and the plurality of sample storage devices and the cleaning pool are evenly distributed on the same circumference; the injection port of the injection mechanism is arranged above the sample tray and corresponds to the position of the sample storage device. By the mutual cooperation of the rotation mechanism of the sample tray and the lifting mechanism of the injection mechanism, the utility model can avoid installing an additional motor at the injection mechanism, so that the injection mechanism only has a lifting movement in the vertical direction, improving the working efficiency of the injection mechanism and saving the material cost.

[0004] Although the above patent achieves the mutual cooperation of the rotation mechanism of the sample tray and the lifting mechanism of the injection mechanism, so that an additional motor can be avoided at the injection mechanism, the injection mechanism only has a lifting movement in the vertical direction, improving the working efficiency of the injection mechanism and saving the material cost; however, the device lacks a positioning component and cannot ensure that the sample can accurately enter the injection port of the chromatographic column during the injection process.

[0005] Therefore, it is necessary to invent a chromatographic auto-sampler to solve the above problems. Content of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] The technical problem solved by the utility model is to provide a chromatographic auto-sampler with high practicability, which can be operated simply and has a relatively simple structure, solving the problem that the lack of a positioning component in the above background art cannot ensure that the sample can accurately enter the injection port of the chromatographic column during the injection process.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the present utility model is realized through the following technical solutions: A chromatographic auto-sampler, including an operation table, two sets of slide rails are provided on the surface of the operation table, two sets of sliding blocks are slidably connected inside the two sets of slide rails, a fixed block is fixedly connected to the tops of the two sets of sliding blocks, mounting components are fixedly connected to both sides of the fixed block, both sets of mounting components include mounting plates and several sets of pins, a rotating component is fixedly connected inside the fixed block, the rotating component includes a servo motor A, a rotating rod, and a turntable, several placement openings are provided on the surface of the turntable, a heating component is fixedly connected to the surface of the fixed block, the heating component includes a controller and a heating mesh, a support frame is fixedly connected to one side of the surface of the fixed block, a lifting component is fixedly connected inside the support frame, the lifting component includes a servo motor B, a transmission rod, and a threaded rod, a connecting plate is threadedly connected to the outside of the threaded rod, a driving component is fixedly connected to the surface of the connecting plate, the driving component includes an electric push rod, a storage battery, and a telescopic plate, a piston rod is fixedly connected to the bottom surface of the telescopic plate, a sleeve is slidably connected to the outside of the piston rod, a sampling needle is fixedly connected to the bottom surface of the sleeve, a positioning component is slidably connected to the outside of the sampling needle, the positioning component includes a positioning block and two sets of telescopic rods, and a limiting rod is slidably connected to the inside of the connecting plate.

[0010] As a further solution of the present utility model, both sets of mounting plates are fixedly connected to both sides of the fixed block, several mounting holes are provided on the surfaces of both sets of mounting plates, several sets of pins are inserted and connected inside the several mounting holes, and the pins are used for fixation.

[0011] As a further solution of the present utility model, the servo motor A is fixedly connected to the inside of the fixed block, the output end of the servo motor A is spline-connected to a rotating rod, and one end of the rotating rod is fixedly connected to a turntable, and the turntable is used for rotation.

[0012] As a further solution of the present utility model, the controller is fixedly connected to one side of the fixed block, one end of the controller is electrically connected to a heating mesh through a power cord, and the heating mesh is fixedly connected to the inside of the fixed block, and the heating mesh is used for heating.

[0013] As a further solution of the present utility model, the servo motor B is fixedly connected to the inside of the support frame, the output end of the servo motor B is spline-connected to a transmission rod, and one end of the transmission rod is fixedly connected to a threaded rod, and the threaded rod is used for rotation.

[0014] As a further solution of the present utility model, the electric push rod is fixedly connected to the surface of the connecting plate, a storage battery is fixedly connected to the outside of the electric push rod, and the other end of the electric push rod is fixedly connected to a telescopic plate, and the telescopic plate is used for limiting.

[0015] As a further solution of the present utility model, the positioning block is slidably connected to the outside of the sampling needle, and two groups of telescopic rods are fixedly connected to the top surface of the positioning block. The positioning block is used for positioning.

[0016] As a further solution of the present utility model, a control console is fixedly connected to the surface of the operating table. A display screen is fixedly connected to the surface of the control console, and control buttons are fixedly connected to the lower end of the surface of the control console. An activity door is opened on one side of the surface of the operating table, and an observation window is opened on the surface of the activity door. The observation window is used for observation.

[0017] (III) Beneficial effects

[0018] The present utility model provides a chromatographic auto-sampler, which has the following beneficial effects:

[0019] 1. For this chromatographic auto-sampler, through the setting of the positioning component, when the device is performing sampling, the positioning block fits with the sampling tube, the sampling needle moves, and the positioning block pushes the telescopic rod to move along with the movement of the sampling needle, which can ensure that the sample can accurately enter the sampling port of the chromatographic column during the sampling process, reduce the sample injection error, ensure the accuracy and repeatability of the experimental results, and at the same time can also help the auto-sampler quickly switch between multiple samples, reducing the manual operation time and possible human errors.

[0020] 2. For this chromatographic auto-sampler, through the setting of the heating component, when in use, some samples may degrade or undergo chemical changes at room temperature. When the device is performing sampling, the controller can control the heating mesh to heat the sample to be injected, ensuring the stability of the sample during the injection process, preventing the degradation of the sample, and thus improving the accuracy of the analysis results.

[0021] 3. For this chromatographic auto-sampler, through the setting of the installation component, when the device is in use, slide the sliding block into the internal rail on the surface of the operating table, align the installation holes on the surface of the installation plate with the installation holes on the surface of the operating table, and fix them with pins, so that the auto-sampler can be fixed to the operating table, preventing the equipment from moving or vibrating during the operation process, and avoiding the vibration generated from affecting the detection results of the auto-sampler. Description of the drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the installation component of the present utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the positioning component of the present utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the heating component of the present utility model.

[0026] In the figure: 1. Operating table; 2. Slide rail; 3. Slide block; 4. Fixed block; 5. Installation component; 501. Installation plate; 502. Plug pin; 6. Rotating component; 601. Servo motor A; 602. Rotating rod; 603. Turntable; 7. Placing port; 8. Heating component; 801. Controller; 802. Heating grid; 9. Support frame; 10. Lifting component; 1001. Servo motor B; 1002. Transmission rod; 1003. Threaded rod; 11. Connecting plate; 12. Driving component; 1201. Electric push rod; 1202. Battery; 1203. Telescopic plate; 13. Piston rod; 14. Sleeve; 15. Sampling needle; 16. Positioning component; 1601. Positioning block; 1602. Expansion rod; 17. Limiting rod; 18. Control console; 19. Display screen; 20. Control button; 21. Activity door; 22. Observation window. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 4, the present utility model provides a technical solution: a chromatographic auto-sampler, which includes an operation table 1. Two sets of slide rails 2 are provided on the surface of the operation table 1. Slide blocks 3 are slidably connected inside the two sets of slide rails 2. Fixed blocks 4 are fixedly connected to the tops of the two sets of slide blocks 3. Mounting components 5 are fixedly connected to both sides of the fixed block 4. Through the setting of the mounting components 5, the device is connected to the operation table 1. Both sets of mounting components 5 include mounting plates 501 and several sets of pins 502. A rotating component 6 is fixedly connected inside the fixed block 4. Through the setting of the rotating component 6, it can sample multiple groups of samples. The rotating component 6 includes a servo motor A601, a rotating rod 602, and a turntable 603. Several placing openings 7 are provided on the surface of the turntable 603. A heating component 8 is fixedly connected to the surface of the fixed block 4. Through the setting of the heating component 8, the samples can be heated. The heating component 8 includes a controller 801 and a heating mesh 802. A support frame 9 is fixedly connected to one side of the surface of the fixed block 4. A lifting component 10 is fixedly connected inside the support frame 9. Through the setting of the lifting component 10, the sampling needle 15 can be lifted and lowered. The lifting component 10 includes a servo motor B1001, a transmission rod 1002, and a threaded rod 1003. A connecting plate 11 is threadedly connected to the outside of the threaded rod 1003. A driving component 12 is fixedly connected to the surface of the connecting plate 11. Through the setting of the driving component 12, the device can perform automatic sampling. The driving component 12 includes an electric push rod 1201, a storage battery 1202, and a telescopic plate 1203. A piston rod 13 is fixedly connected to the bottom surface of the telescopic plate 1203. A sleeve 14 is slidably connected to the outside of the piston rod 13. A sampling needle 15 is fixedly connected to the bottom surface of the sleeve 14. A positioning component 16 is slidably connected to the outside of the sampling needle 15. Through the setting of the positioning component 16, the device can operate more precisely. The positioning component 16 includes a positioning block 1601 and two sets of telescopic rods 1602. A limiting rod 17 is slidably connected to the inside of the connecting plate 11;

[0029] Please refer to Figure 2 , both sets of mounting plates 501 are fixedly connected to both sides of the fixed block 4. Several mounting holes are provided on the surfaces of both sets of mounting plates 501. Pins 502 are inserted and connected inside the several mounting holes, and the pins 502 are used for fixing;

[0030] Please refer to Figure 4 , the servo motor A601 is fixedly connected inside the fixed block 4. The output end of the servo motor A601 is spline-connected to a rotating rod 602. One end of the rotating rod 602 is fixedly connected to a turntable 603, and the turntable 603 is used for rotation;

[0031] Please refer to Figure 4, the controller 801 is fixedly connected to one side of the fixed block 4. One end of the controller 801 is electrically connected to a heating grid 802 through a power cord. The heating grid 802 is fixedly connected to the inside of the fixed block 4 and is used for heating;

[0032] Please refer to Figure 3 , the servo motor B1001 is fixedly connected to the inside of the support frame 9. The output end of the servo motor B1001 is splined with a transmission rod 1002. One end of the transmission rod 1002 is fixedly connected to a threaded rod 1003, and the threaded rod 1003 is used for rotation;

[0033] Please refer to Figure 3 , the electric push rod 1201 is fixedly connected to the surface of the connecting plate 11. A storage battery 1202 is fixedly connected to the outside of the electric push rod 1201. The other end of the electric push rod 1201 is fixedly connected to a telescopic plate 1203, and the telescopic plate 1203 is used for limiting;

[0034] Please refer to Figure 3 , the positioning block 1601 is slidably connected to the outside of the sampling needle 15. Two groups of telescopic rods 1602 are fixedly connected to the top surface of the positioning block 1601, and the positioning block 1601 is used for positioning;

[0035] Please refer to Figure 1 , the surface of the operating table 1 is fixedly connected with a control console 18. The surface of the control console 18 is fixedly connected with a display screen 19. The lower end of the surface of the control console 18 is fixedly connected with control buttons 20. An activity door 21 is opened on one side of the surface of the operating table 1, and an observation window 22 is opened on the surface of the activity door 21, and the observation window 22 is used for observation.

[0036] The model of the controller 801 is: PG-R7, and the above parameters and models can be selected according to the actual situation.

[0037] In the present utility model, the working steps of the device are as follows:

[0038] The first step: When the device performs sampling, the positioning block 1601 fits with the sampling tube, the sampling needle 15 moves, and the positioning block 1601 pushes the telescopic rod 1602 to move along with the movement of the sampling needle 15, which can ensure that the sample can accurately enter the sampling port of the chromatographic column during the sampling process, reduce the sample injection error, ensure the accuracy and repeatability of the experimental results, and at the same time can also help the sampler to quickly switch between multiple samples, reducing the manual operation time and possible human errors;

[0039] The second step: When in use, some samples may degrade or undergo chemical changes at room temperature. When the device performs sampling, the controller 801 can control the heating grid 802 to heat the sample to be injected, ensure the stability of the sample during the injection process, prevent the degradation of the sample, and thus improve the accuracy of the analysis results;

[0040] Third step: When the device is in use, slide the slider 3 into the inside of the slide rail 2 on the surface of the operating table 1, align the mounting holes on the surface of the mounting plate 501 with the mounting holes on the surface of the operating table 1, and fix them with pins 502, so that the sampler can be fixed to the operating table 1, preventing the device from moving or vibrating during operation and avoiding the vibration generated from affecting the detection results of the sampler.

[0041] It should be noted that the device structure and drawings of the present utility model mainly describe the principle of the present utility model. Based on this design principle, the settings of the power mechanism, power supply system, control system, etc. of the device are not fully described. However, on the premise that those skilled in the art understand the principle of the above-mentioned utility model, the specific details of its power mechanism, power supply system, and control system can be clearly known. The control mode of the application document is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art;

[0042] All the standard parts used can be purchased from the market, and can also be customized according to the description in the specification and drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art, and the components known to those skilled in the art, their structures and principles can all be known by those skilled in the art through technical manuals or by conventional experimental methods.

[0043] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A chromatographic automatic sample injector, comprising an operating table (1), characterized in that: The surface of the operating table (1) is provided with two groups of slide rails (2), the inside of the two groups of slide rails (2) are slidably connected with sliding blocks (3), the tops of the two groups of sliding blocks (3) are fixedly connected with fixed blocks (4), the two sides of the fixed blocks (4) are fixedly connected with mounting components (5), the two groups of mounting components (5) each include a mounting plate (501) and a plurality of groups of latches (502), the inside of the fixed block (4) is fixedly connected with a rotating component (6), the rotating component (6) includes a servo motor A (601), a rotating rod (602), and a rotating disk (603), the surface of the rotating disk (603) is provided with a plurality of groups of placement openings (7), the surface of the fixed block (4) is fixedly connected with a heating component (8), the heating component (8) includes a controller (801) and a heating net (802), one side of the surface of the fixed block (4) is fixedly connected with a support frame (9), the inside of the support frame (9) is fixedly connected with a A lifting assembly (10) is connected, the lifting assembly (10) comprising a servo motor B (1001), a transmission rod (1002), and a threaded rod (1003), the outer side of the threaded rod (1003) being threadedly connected to a connecting plate (11), the surface of the connecting plate (11) being fixedly connected to a driving assembly (12), the driving assembly (12) comprising an electric push rod (1201), a storage battery (1202), and a telescopic plate (1203), the telescopic The bottom surface of the plate (1203) is fixedly connected to a piston rod (13), the outer side of the piston rod (13) is slidably connected to a sleeve (14), the bottom surface of the sleeve (14) is fixedly connected to an injection needle (15), the outer side of the injection needle (15) is slidably connected to a positioning assembly (16), the positioning assembly (16) includes a positioning block (1601) and two groups of telescopic rods (1602), and the inner side of the connecting plate (11) is slidably connected to a limiting rod (17).

2. A chromatographic automatic sample injector according to claim 1, characterized in that: The two groups of mounting plates (501) are fixedly connected to the two sides of the fixing block (4), and the surfaces of the two groups of mounting plates (501) are provided with a plurality of mounting holes, and the interiors of the plurality of mounting holes are plugged with latches (502).

3. A chromatographic automatic sample injector according to claim 1, characterized in that: The servo motor A (601) is fixedly connected to the inside of the fixed block (4); the output end of the servo motor A (601) is spline-connected to a rotating rod (602); one end of the rotating rod (602) is fixedly connected to a rotating disk (603).

4. A chromatographic automatic sample injector according to claim 1, characterized in that: The controller (801) is fixedly connected to one side of the fixed block (4); one end of the controller (801) is electrically connected to a heating network (802) via a power line; and the heating network (802) is fixedly connected to the inside of the fixed block (4).

5. A chromatographic automatic sample injector according to claim 1, characterized in that: The servo motor B (1001) is fixedly connected to the inside of the support frame (9); the output end of the servo motor B (1001) is spline-connected to a transmission rod (1002); one end of the transmission rod (1002) is fixedly connected to a threaded rod (1003).

6. A chromatographic automatic sample injector according to claim 1, characterized in that: The electric push rod (1201) is fixedly connected to the surface of the connecting plate (11), the outer side of the electric push rod (1201) is fixedly connected to a battery (1202), and the other end of the electric push rod (1201) is fixedly connected to a telescopic plate (1203).

7. A chromatographic automatic sample injector according to claim 1, characterized in that: The positioning block (1601) is slidably connected to the outer side of the injection needle (15), and the top surface of the positioning block (1601) is fixedly connected to two sets of telescopic rods (1602).

8. A chromatographic automatic sample injector according to claim 1, characterized in that: A control console (18) is fixedly connected to the surface of the operating table (1), a display screen (19) is fixedly connected to the surface of the control console (18), a control button (20) is fixedly connected to the lower end of the surface of the control console (18), a movable door (21) is provided on one side of the surface of the operating table (1), and an observation window (22) is provided on the surface of the movable door (21).

Images