Thin-layer chromatography scanner

Abstract

The utility model relates to the technical field of thin-layer chromatography, and discloses a thin-layer chromatography scanner which comprises a machine table, a thin-layer support plate arranged on the machine table and a plurality of test tubes arranged on one side of the machine table, a plurality of sample application devices are arranged on the machine table, driving devices are arranged on the sample application devices, and a fixing device is arranged on the thin-layer support plate; the driving device comprises a transverse driving part, a longitudinal driving part and a swinging part; the fixing device comprises two clamping plates and a moving assembly, the two clamping plates press and fix the two sides of the thin-layer carrier plate, and the moving assembly drives the thin-layer carrier plate to move. According to the utility model, the sample applicator controller is used for controlling the sample applicator to draw a sample solvent in a test tube and carrying out sample application on the thin-layer support plate, so that the amount of solution drawn and released by the sample applicator can be accurately controlled, and meanwhile, the movement of the sample applicator is controlled by the driving device, so that the sample application interval of a sample can be accurately controlled; therefore, the test failure caused by errors of the release amount of the sample solvent and the sample application interval when the chromatographic test is carried out is prevented.

Description

Technical Field

[0001] This utility model relates to the field of thin-layer chromatography technology, specifically a thin-layer chromatography scanner. Background Technology

[0002] Thin-layer chromatography (TLC) involves coating a suitable stationary phase onto a glass, plastic, or aluminum substrate to form a uniform thin layer. After spotting and development, the ratio shift value is compared with the ratio shift value of a suitable reference chromatogram obtained using the same method. This method is used for drug identification, impurity detection, or content determination. TLC is an important experimental technique for the rapid separation and qualitative analysis of small amounts of substances and is also used to track reaction progress. In conventional TLC experiments, sample intervals are manually divided on the TLC paper according to the number of samples, and then the samples are spotted onto the TLC paper using a spotter. Due to the manual operation, it is difficult to accurately control the precision of sample interval division and the amount of sample solution. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0004] A thin-layer chromatography scanner includes a machine base, a thin-layer carrier plate disposed on the machine base, and multiple test tubes disposed on one side of the machine base. Multiple sample spotters are disposed on the machine base, and each sample spotter is provided with a driving device. A fixing device is disposed on the thin-layer carrier plate.

[0005] The driving device includes a lateral driving component, a longitudinal driving component, and a swinging component. The lateral and longitudinal driving components drive the sampler to move back and forth in the horizontal direction, and the swinging component drives a single sampler to move up and down, so that the sampler can draw reagents from the test tube.

[0006] The fixing device includes two clamping plates and a moving component. The two clamping plates press and fix the thin-layer carrier plate on both sides, and the moving component drives the thin-layer carrier plate to move so that the thin-layer carrier plate is positioned on the scanning instrument.

[0007] Preferably, an installation space is provided on one side of the machine. When the driving device moves the sample dispenser to the initial position, the sample dispenser is located in the installation space. A lifting platform is provided in the installation space, and a reagent rack is fixedly connected to the lifting platform. Multiple test tubes are installed on the reagent rack.

[0008] Preferably, the transverse drive component includes a transverse screw, and fixed blocks are fixedly connected to the four corners of the machine base. A transverse rail is fixedly connected to the top of two of the fixed blocks, and a transverse slide is slidably connected to the transverse rail. The two ends of the transverse screw are rotatably disposed between the two fixed blocks and located at the bottom of one of the transverse rails through bearings. A transverse sliding seat is threaded onto the transverse screw, and the transverse sliding seat is fixedly connected to the transverse slide. A first motor is fixedly connected to one side of one of the fixed blocks, and the output end of the first motor is fixedly connected to the transverse screw.

[0009] Preferably, the longitudinal drive component includes a longitudinal screw, two connecting plates are fixedly connected to the two transverse slides, a longitudinal rail is fixedly connected between the two connecting plates, a longitudinal slide is slidably mounted on the longitudinal rail, a vertical plate is fixedly connected to one side of the longitudinal slide, the two ends of the longitudinal screw are disposed between the two connecting plates via bearings, a longitudinal sliding seat is threaded onto the longitudinal screw, the longitudinal sliding seat is fixedly connected to the longitudinal slide, and a second motor is fixedly connected to one of the connecting plates, the output end of the second motor is fixedly connected to one end of the longitudinal screw.

[0010] Preferably, the oscillating component includes multiple spotting device controllers. Two servo motors are fixedly mounted on one side of the vertical plate, and two rotating plates are mounted on the other side of the vertical plate. Two through holes are opened on the vertical plate. A rotating shaft is fixedly connected to one side of the rotating plate. The output end of the servo motor is fixedly connected to the rotating shaft. Ball bearings are rotatably connected to both ends of one side of the rotating plate via bearings. Multiple vertical rails are fixedly connected to the vertical plate. A slide cylinder is slidably mounted on the vertical rail. A rectangular plate is fixedly connected to one side of the slide cylinder. One of the ball bearings is located at the top of the rectangular plate. A horizontal plate is fixedly connected to the bottom of the rectangular plate. The spotting device is fixedly installed at the bottom of the horizontal plate. The spotting device controller is fixedly installed at the top of the horizontal plate. The output end of the spotting device controller is fixedly connected to the spotting device.

[0011] Preferably, the moving component includes two guide rails, on which movable slides are slidably mounted. A movable plate is fixedly connected to the movable slides. The two movable slides are located at one edge of the bottom of the movable plate. A screw hole seat is fixedly connected to the bottom of the movable plate. A bearing seat is fixedly connected to the top edge of the machine base. A threaded rod is threaded into the screw hole seat. One end of the threaded rod is rotatably connected to the bearing seat through a bearing. A drive motor is fixedly connected to the top of the machine base. The output end of the drive motor is fixedly connected to one end of the threaded rod.

[0012] Preferably, the thin-layer carrier plate is placed on a movable plate. Slide grooves are formed on both sides of the top of the movable plate, and positioning plates are slidably mounted at both ends of the slide grooves. A slider is fixedly connected to the bottom of the positioning plate, and the slider is slidably positioned within the slide groove. A bidirectional screw is rotatably connected to the slide groove via a bearing, and the bidirectional screw is threadedly connected to the slider. A third motor is fixedly connected to one side of the movable plate, and the output end of the third motor is fixedly connected to one end of the bidirectional screw. An inner groove is formed on one side of the positioning plate, and hinge shafts are fixedly connected to both ends of the clamping plate. The clamping plate is positioned within the inner groove and is movably hinged to the positioning plate via the hinge shafts. A fourth motor is fixedly connected to one side of the positioning plate, and the output end of the fourth motor is fixedly connected to the hinge shaft.

[0013] Compared with the prior art, the present invention provides a thin-layer chromatography scanner, which has the following beneficial effects:

[0014] 1. A thin-layer chromatography scanner, which controls the spotter to draw sample solvent from test tubes and spot samples onto a thin-layer plate via a spotter controller, can precisely control the amount of solution drawn and released by the spotter. Simultaneously, a drive device controls the movement of the spotter, enabling precise control of the sample spotting interval. This prevents experimental failure due to errors in the amount of sample solvent released or the spotting interval during chromatographic experiments. It solves the problem of difficulty in accurately controlling the precision of sample interval division and the amount of sample solution in conventional thin-layer plate chromatographic experiments, where sample intervals are manually divided on thin-layer chromatographic paper according to the number of samples, and then the spotter is used for spotting.

[0015] 2. A thin-layer chromatography scanner, by setting up a moving component and positioning the movable slide in the moving component at the bottom edge of the moving plate, allows the thin-layer chromatography plate to be directly moved onto the chromatography scanner for accurate detection after spotting, avoiding contamination of the thin-layer chromatography plate when manually handling it, which would reduce the accuracy of the test.

[0016] 3. A thin-layer chromatography scanner, by setting multiple spotters, can effectively pick up multiple samples at once, thereby simultaneously spotting sample solvents that can be spotted at the same time, thus increasing the spotting efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the fixing device structure of this utility model;

[0019] Figure 3 For the present utility model Figure 2 Schematic diagram of the structure of section A;

[0020] Figure 4 This is a schematic diagram of the drive device structure of this utility model;

[0021] Figure 5 For the present utility model Figure 4 Schematic diagram of section B in the middle.

[0022] In the diagram: 1. Machine base; 2. Thin-layer carrier plate; 3. Test tube; 4. Sample applicator; 5. Drive unit; 6. Fixing device; 51. Horizontal drive component; 52. Longitudinal drive component; 53. Swing component; 61. Clamping plate; 62. Moving component; 7. Installation space; 8. Lifting platform; 9. Reagent rack; 511. Horizontal screw; 512. Fixing block; 513. Horizontal rail; 514. Horizontal slide table; 515. Horizontal sliding seat; 516. First motor; 521. Longitudinal screw; 522. Connecting plate; 523. Longitudinal rail; 524. Longitudinal slide table; 525. Vertical plate; 526. Longitudinal... 527. Sliding seat; 531. Second motor; 532. Spotting instrument controller; 533. Servo motor; 534. Rotating plate; 535. Through hole; 536. Rotating shaft; 537. Ball bearing; 538. Vertical rail; 539. Slide cylinder; 530. Rectangular plate; 621. Horizontal plate; 622. Guide rail; 623. Movable slide; 624. Screw hole seat; 625. Bearing seat; 626. Threaded rod; 627. Drive motor; 63. Slide groove; 64. Positioning plate; 65. Bidirectional screw; 66. Third motor; 67. Hinge shaft; 68. Fourth motor. Detailed Implementation

[0023] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a thin-layer chromatography scanner.

[0025] Please see Figures 1-5 A thin-layer chromatography scanner includes a base 1, a thin-layer carrier plate 2 disposed on the base 1, and a plurality of test tubes 3 disposed on one side of the base 1. The scanner is characterized in that: a plurality of spotters 4 are disposed on the base 1, a driving device 5 is disposed on the spotter 4, and a fixing device 6 is disposed on the thin-layer carrier plate 2.

[0026] The driving device 5 includes a lateral driving member 51, a longitudinal driving member 52, and a swinging member 53. The lateral driving member 51 and the longitudinal driving member 52 drive the sampler 4 to move back and forth in the horizontal direction, and the swinging member 53 drives the single sampler 4 to move up and down so that the sampler 4 can draw the reagent in the test tube 3.

[0027] The fixing device 6 includes two clamping plates 61 and a moving component 62. The two clamping plates 61 press and fix the thin-layer carrier plate 2 on both sides, and the moving component 62 drives the thin-layer carrier plate 2 to move so that the thin-layer carrier plate 2 is positioned on the scanning instrument.

[0028] Specifically, the thin-layer carrier plate 2 is placed on the instrument 1, and the two sides of the thin-layer carrier plate 2 are fixed and clamped by the clamping plate 61. The lateral drive component 51 drives the spotter 4 to move laterally on the instrument 1, and the longitudinal drive component 52 drives the spotter 4 to move longitudinally on the instrument 1, so that multiple spotters 4 are located at the top of the test tube 3 containing sample solvent. Then, the swing component 53 drives the spotter 4 to move downward and draws the sample solvent through the spotter 4. After the drawing is completed, the swing component 53 drives the spotter 4 to reset. Then, the drive device 5 drives the spotter 4 to move to the top of the thin-layer carrier plate 2 and spot the sample on the thin-layer carrier plate 2. After the thin-layer carrier plate 2 is spotted, the moving component 62 drives the thin-layer carrier plate 2 to move and move the thin-layer carrier plate 2 to the chromatography scanner for accurate detection.

[0029] The spotting device controller 531 controls the spotter 4 to draw the sample solvent from the test tube 3 and spot it onto the thin-layer plate 2. It can accurately control the amount of solution drawn and released by the spotter 4. At the same time, the drive device 5 controls the movement of the spotter 4, which can accurately control the spotting interval of the sample. This prevents the failure of the test due to errors in the amount of sample solvent released and the spotting interval during the chromatographic experiment. It solves the problem that in conventional thin-layer plates 2, when performing chromatographic experiments, it is difficult to accurately control the accuracy of sample interval division and the amount of sample solution by manually dividing the sample interval on the thin-layer chromatographic paper according to the number of samples and then spotting it onto the thin-layer chromatographic paper by the spotter 4.

[0030] See Figures 1-5 The machine 1 has an installation space 7 on one side. When the drive device 5 drives the sampler 4 to the initial position, the sampler 4 is located on the installation space 7. The installation space 7 is equipped with a lifting platform 8. A reagent rack 9 is fixedly connected to the lifting platform 8. Multiple test tubes 3 are installed on the reagent rack 9.

[0031] Specifically, by setting up the lifting platform 8, the distance between the mouth of the test tube 3 and the sample applicator 4 is controlled, thereby preventing the sample applicator 4 from being unable to draw the reagents from the test tube 3.

[0032] See Figures 1-5The transverse drive component 51 includes a transverse screw 511. Fixed blocks 512 are fixedly connected to the four corners of the machine base 1. A transverse rail 513 is fixedly connected to the top of two fixed blocks 512. A transverse slide table 514 is slidably connected to the transverse rail 513. The two ends of the transverse screw 511 are rotatably disposed between the two fixed blocks 512 through bearings and are located at the bottom of one of the transverse rails 513. A transverse sliding seat 515 is threaded onto the transverse screw 511. The transverse sliding seat 515 is fixedly connected to the transverse slide table 514. A first motor 516 is fixedly connected to one side of one of the fixed blocks 512. The output end of the first motor 516 is fixedly connected to the transverse screw 511.

[0033] The longitudinal drive component 52 includes a longitudinal screw 521, two transverse slides 514 with connecting plates 522 fixedly connected to them, a longitudinal rail 523 fixedly connected between the two connecting plates 522, a longitudinal slide 524 slidably mounted on the longitudinal rail 523, a vertical plate 525 fixedly connected to one side of the longitudinal slide 524, the two ends of the longitudinal screw 521 being disposed between the two connecting plates 522 via bearings, a longitudinal sliding seat 526 being threadedly mounted on the longitudinal screw 521, the longitudinal sliding seat 526 being fixedly connected to the longitudinal slide 524, and a second motor 527 fixedly connected to one of the connecting plates 522, the output end of the second motor 527 being fixedly connected to one end of the longitudinal screw 521.

[0034] The swing component 53 includes multiple spotting controllers 531. Two servo motors 532 are fixedly installed on one side of the vertical plate 525, and two rotating plates 533 are installed on the other side of the vertical plate 525. Two through holes 534 are opened on the vertical plate 525. A rotating shaft 535 is fixedly connected to one side of the rotating plate 533. The output end of the servo motor 532 is fixedly connected to the rotating shaft 535. Ball bearings 536 are rotatably connected to both ends of one side of the rotating plate 533 through bearings. Multiple vertical rails 537 are fixedly connected to the vertical plate 525. A slide cylinder 538 is slidably installed on the vertical rail 537. A rectangular plate 539 is fixedly connected to one side of the slide cylinder 538. One of the ball bearings 536 is located at the top of the rectangular plate 539. A horizontal plate 530 is fixedly connected to the bottom of the rectangular plate 539. The spotting device 4 is fixedly installed at the bottom of the horizontal plate 530. The spotting controller 531 is fixedly installed at the top of the horizontal plate 530. The output end of the spotting controller 531 is fixedly connected to the spotting device 4.

[0035] Specifically, the first motor 516 drives the transverse screw 511 to rotate. Through the threaded connection between the transverse sliding seat 515 and the transverse screw 511, the transverse sliding seat 515 moves laterally on the machine base 1. Through the fixed connection between the transverse sliding seat 515 and the transverse slide table 514, and the sliding connection between the transverse slide table 514 and the transverse rail 513, the transverse slide table 514 moves laterally on the transverse guide rail 621. The second motor 527 drives the longitudinal screw 521 to rotate. Through the threaded connection between the longitudinal sliding seat 526 and the longitudinal screw 521, the longitudinal sliding seat 526 moves longitudinally on the machine base 1. Through the fixed connection between the longitudinal sliding seat 526 and the longitudinal slide table 524, and the sliding connection between the longitudinal slide table 524 and the longitudinal rail 523, the longitudinal slide table 524 moves longitudinally on the longitudinal rail 523. Thus, through the transverse drive component... The servo motor 532 drives the sample applicator 4 to move laterally and longitudinally, while the servo motor 532 drives the rotating shaft 535 to rotate, thereby causing the rotating plate 533 and the ball bearing 536 on the rotating plate 533 to rotate around the rotating shaft 535. When one end of the rotating plate 533 rotates downward, the ball bearing 536 at the end of the rotating plate 533 contacts the top of the rectangular plate 539, and drives the rectangular plate 539 to move downward on the vertical track 537, thereby driving the sample applicator 4 to move downward and draw the sample solvent in the test tube 3. Then, it is reset by the sliding cylinder 538. After drawing the sample solvent, the lateral drive 51 and the longitudinal drive 52 drive the sample applicator 4 to move towards the thin-layer carrier plate 2. Then, the swinging component 53 drives the sample applicator 4 to approach the top of the thin-layer carrier plate 2. At the same time, the sample applicator controller 531 controls the amount of sample solvent to be applied.

[0036] See Figures 1-5 The moving component 62 includes two guide rails 621, on which movable slides 622 are slidably mounted. A movable plate 623 is fixedly connected to the movable slides 622. The two movable slides 622 are located at one edge of the bottom of the movable plate 623. A screw hole seat 624 is fixedly connected to the bottom of the movable plate 623. A bearing seat 625 is fixedly connected to the top edge of the machine base 1. A threaded rod 626 is threadedly mounted in the screw hole seat 624. One end of the threaded rod 626 is rotatably connected to the bearing seat 625 through a bearing. A drive motor 627 is fixedly connected to the top of the machine base 1. The output end of the drive motor 627 is fixedly connected to one end of the threaded rod 626.

[0037] A thin-layer carrier plate 2 is placed on a movable plate 623. The top two sides of the movable plate 623 are provided with sliding grooves 63. Positioning plates 64 are slidably provided at both ends of the sliding grooves 63. A slider is fixedly connected to the bottom of the positioning plate 64. The slider is slidably located in the sliding grooves 63. A bidirectional screw 65 is rotatably connected to the sliding grooves 63 through bearings. The bidirectional screw 65 is threadedly connected to the slider. A third motor 66 is fixedly connected to one side of the movable plate 623. The output end of the third motor 66 is fixedly connected to one end of the bidirectional screw 65. An inner groove is provided on one side of the positioning plate 64. A hinge shaft 67 is fixedly connected to both ends of the clamping plate 61. The clamping plate 61 is located in the inner groove and is movably hinged to the positioning plate 64 through the hinge shaft 67. A fourth motor 68 is fixedly connected to one side of the positioning plate 64. The output end of the fourth motor 68 is fixedly connected to the hinge shaft 67.

[0038] Specifically, the thin-layer carrier plate 2 is placed on the moving plate 623. The third motor 66 drives the bidirectional screw 65 to rotate. Through the threaded connection between the bidirectional screw 65 and the two positioning plates 64, the two positioning plates 64 are driven to move in opposite directions, thereby fixing the thin-layer carrier plate 2 between the two positioning plates 64. At the same time, the fourth motor 68 drives the clamping plate 61 to rotate, fixing the top two sides of the thin-layer carrier plate 2. After the thin-layer carrier plate 2 is spotted, the drive motor 627 drives the threaded rod 626 to rotate. Through the threaded connection between the threaded rod 626 and the screw hole seat 624, and the sliding connection between the movable slide 622 and the guide rail 621, the moving plate 623 is moved outward, thereby moving the thin-layer carrier plate 2 onto the chromatography scanner for precise detection.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thin layer chromatography scanner, comprising a machine table (1), a thin layer plate (2) arranged on the machine table (1), and a plurality of test tubes (3) arranged on one side of the machine table (1), characterized in that: The machine base (1) is provided with multiple sample dispensers (4), the sample dispensers (4) are provided with driving devices (5), and the thin-layer carrier plate (2) is provided with fixing devices (6); The driving device (5) includes a horizontal driving member (51), a vertical driving member (52), and a swinging member (53). The horizontal driving member (51) and the vertical driving member (52) drive the sampler (4) to move back and forth in the horizontal direction. The swinging member (53) drives the single sampler (4) to move up and down so that the sampler (4) can draw the reagent in the test tube (3). The fixing device (6) includes two clamping plates (61) and a moving component (62). The two clamping plates (61) press and fix the thin-layer carrier plate (2) on both sides. The moving component (62) drives the thin-layer carrier plate (2) to move so that the thin-layer carrier plate (2) is located on the scanning instrument.

2. A thin layer chromatography scanner according to claim 1, characterised in that: The machine (1) has an installation space (7) on one side. When the driving device (5) drives the sample dispenser (4) to the initial position, the sample dispenser (4) is located on the installation space (7). The installation space (7) is equipped with a lifting platform (8). A reagent rack (9) is fixedly connected to the lifting platform (8). Multiple test tubes (3) are installed on the reagent rack (9).

3. A thin layer chromatogram scanner according to claim 2, characterised in that: The transverse drive component (51) includes a transverse screw (511). Fixed blocks (512) are fixedly connected at the four corners of the machine base (1). A transverse rail (513) is fixedly connected to the top of two of the fixed blocks (512). A transverse slide (514) is slidably connected to the transverse rail (513). The two ends of the transverse screw (511) are rotatably disposed between the two fixed blocks (512) and located at the bottom of one of the transverse rails (513) through bearings. A transverse sliding seat (515) is threaded onto the transverse screw (511). The transverse sliding seat (515) is fixedly connected to the transverse slide (514). A first motor (516) is fixedly connected to one side of one of the fixed blocks (512). The output end of the first motor (516) is fixedly connected to the transverse screw (511).

4. A thin layer chromatogram scanner according to claim 3, characterised in that: The longitudinal drive component (52) includes a longitudinal screw (521), two transverse slides (514) are fixedly connected to connecting plates (522), a longitudinal rail (523) is fixedly connected between the two connecting plates (522), a longitudinal slide (524) is slidably provided on the longitudinal rail (523), a vertical plate (525) is fixedly connected to one side of the longitudinal slide (524), the two ends of the longitudinal screw (521) are provided between the two connecting plates (522) through bearings, a longitudinal sliding seat (526) is threadedly assembled on the longitudinal screw (521), the longitudinal sliding seat (526) is fixedly connected to the longitudinal slide (524), a second motor (527) is fixedly connected to one of the connecting plates (522), and the output end of the second motor (527) is fixedly connected to one end of the longitudinal screw (521).

5. A thin layer chromatogram scanner according to claim 4, characterised in that: The swing component (53) includes multiple spotting instrument controllers (531). Two servo motors (532) are fixedly mounted on one side of the vertical plate (525), and two rotating plates (533) are mounted on the other side of the vertical plate (525). Two through holes (534) are opened on the vertical plate (525). A rotating shaft (535) is fixedly connected to one side of the rotating plate (533). The output end of the servo motor (532) is fixedly connected to the rotating shaft (535). Ball bearings (536) are rotatably connected to both ends of one side of the rotating plate (533) through bearings. The vertical plate (525) is fixed with... Multiple vertical rails (537) are connected, and a sliding cylinder (538) is slidably mounted on the vertical rails (537). A rectangular plate (539) is fixedly connected to one side of the sliding cylinder (538). One of the ball bearings (536) is located at the top of the rectangular plate (539). A horizontal plate (530) is fixedly connected to the bottom of the rectangular plate (539). The sampler (4) is fixedly installed at the bottom of the horizontal plate (530). The sampler controller (531) is fixedly installed at the top of the horizontal plate (530). The output end of the sampler controller (531) is fixedly connected to the sampler (4).

6. A thin layer chromatogram scanner according to claim 5, characterised in that: The moving component (62) includes two guide rails (621), and movable slides (622) are slidably mounted on the two guide rails (621). A movable plate (623) is fixedly connected to the movable slides (622). The two movable slides (622) are located at one edge of the bottom of the movable plate (623). A screw hole seat (624) is fixedly connected to the bottom of the movable plate (623). A bearing seat (625) is fixedly connected to the top edge of the machine base (1). A threaded rod (626) is threadedly mounted in the screw hole seat (624). One end of the threaded rod (626) is rotatably connected to the bearing seat (625) through a bearing. A drive motor (627) is fixedly connected to the top of the machine base (1). The output end of the drive motor (627) is fixedly connected to one end of the threaded rod (626).

7. A thin layer chromatography scanner according to claim 6, characterised in that: The thin-layer carrier plate (2) is placed on the movable plate (623). The movable plate (623) has grooves (63) on both sides of its top. Positioning plates (64) are slidably mounted at both ends of the grooves (63). A slider is fixedly connected to the bottom of each positioning plate (64). The slider is slidably positioned within the grooves (63). A bidirectional screw (65) is rotatably connected to the grooves (63) via a bearing. The bidirectional screw (65) is threadedly connected to the slider. The movable plate (623) is fixedly connected to one side of the movable plate. There is a third motor (66), the output end of which is fixedly connected to one end of a bidirectional screw (65). An inner groove is provided on one side of the positioning plate (64). Both ends of the clamping plate (61) are fixedly connected to hinge shafts (67). The clamping plate (61) is located in the inner groove and is movably hinged to the positioning plate (64) through the hinge shafts (67). A fourth motor (68) is fixedly connected to one side of the positioning plate (64), and the output end of the fourth motor (68) is fixedly connected to the hinge shafts (67).

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