A sample preparation device suitable for powder and granular samples

Abstract

This invention discloses a sample preparation device suitable for powder and granular samples. A sample adding module, a sample pressing module, and a rotating worktable are all mounted on a base. A sample box is fixedly connected to the rotating worktable. The sample adding module stores powder / granules, and the amount of powder or granular sample added each time can be controlled through a material adding component. The sample pressing module is equipped with a vertically movable loading head, which can be used to press the powder / granules in the sample box. Through the coordinated operation of the above two modules, the amount of material added at one time and the pressing force can be controlled according to the experimental requirements, meeting the sample preparation needs of different samples. This invention has the advantages of simple structure and convenient operation, can meet the preparation needs of various powder and granular samples, helps to reduce sample inhomogeneity caused by manual sample loading, thereby ensuring the consistency of experimental testing, and reduces the impact of human contamination or special samples on personnel.

Description

Technical Field

[0001] This invention belongs to the fields of mechanical transmission, civil engineering and geological science, and specifically relates to a sample preparation device suitable for powder and granular samples. Background Technology

[0002] Centrifugation simulation offers advantages in terms of time and scale reduction. Using centrifugation simulations in hypergravity to study the physical properties of larger-scale and deeper geological conditions has become a research hotspot. Model preparation is a crucial step in ensuring the success of centrifugation simulation experiments. For powder or granular samples, the density and uniformity of the sample preparation directly affect the success or failure of the experiment. For example, in testing the concentration of deep lava, researchers first need to load the simulated lava powder sample into a sample box, and then perform multiple additions and compactions to prepare the sample. Differences in sample preparation are significantly influenced by the operator's technique, leading to poor consistency across multiple experiments in hypergravity testing and a low success rate. The waste of manpower, resources, and time resulting from a single failed experiment is enormous. Therefore, improving sample preparation quality is particularly important and beneficial for conducting repeatable verification experiments. Summary of the Invention

[0003] In order to solve the problems existing in the background art, the purpose of the present invention is to provide a sample preparation device suitable for powder and particulate samples, so as to solve the problem of poor uniformity and consistency of model sample preparation, and improve the success rate and repeatability of experiments.

[0004] The technical solution adopted in this invention is as follows:

[0005] The device includes a sample adding module, a sample pressing module, a base, a rotating stage, and a sample box. The sample adding module, sample pressing module, and rotating stage are all mounted on the base. The sample adding module and sample pressing module are located on the left and right sides of the rotating stage, respectively. The sample box is fixedly connected to the upper surface of the rotating stage. The sample adding module stores powder / particles and is used to add the powder / particles to the sample box. The sample pressing module has a vertically movable loading head used to press the powder / particles in the sample box. Both the sample adding module and the sample pressing module are electrically connected to an external control system.

[0006] The sample addition module includes a first driving component, side plates, a rotating shaft, a guide tube, and a funnel. The first driving component is fixedly mounted on the base via a first motor mounting bracket. The output end of the first driving component is coaxially connected to the rotating shaft, which is positioned along the length of the base. The first driving component drives the rotating shaft to rotate. Two side plates are symmetrically mounted on the base along the width of the base. The two ends of the funnel are connected to the tops of the two side plates, respectively. The funnel stores powder / particles. The bottom of the funnel is connected to the guide tube with openings at the top and bottom. A through hole is provided at the bottom of the guide tube. The output end of the rotating shaft passes through the through hole and is rotatably connected to the guide tube. A groove is provided at the connection point between the rotating shaft and the guide tube. The powder / particles in the funnel fall into the sample box through the groove.

[0007] The sample clamping module includes a second driving component, a lead screw assembly fixing plate, a second motor fixing seat, a lead screw assembly, a pressure sensor, and a loading head. The lead screw assembly fixing plate is vertically mounted on the upper surface of the base. The second driving component is fixedly mounted on the top of the lead screw assembly fixing plate via the second motor fixing seat. The output end of the second driving component is connected to the lead screw assembly. The second driving component is used to drive the lead screw assembly to move up and down. The lead screw assembly is movably connected to the lead screw assembly fixing plate. The loading head is fixedly connected to the lead screw assembly. A pressure sensor is provided on the top of the loading head. The pressure sensor is connected to the control system.

[0008] The aforementioned lead screw assembly includes a ball screw, guide rails, sliders, connecting blocks, a cross plate, a bearing seat, a loading plate, and a nut. The bearing seat is installed at the bottom of the lead screw assembly fixing plate. Two guide rails are vertically connected to both sides of the lead screw assembly fixing plate. The sliders are movably connected to the guide rails. The two ends of the cross plate are fixedly connected to the two sliders via connecting blocks. The output end of the second drive component is fixedly connected to the top end of the ball screw. The bottom end of the ball screw is rotatably set in the bearing seat, and the ball screw is perpendicular to the base. The nut is movably fitted around the outer circumference of the ball screw. The nut is connected to the middle of the cross plate. The loading plate is fixedly installed on the cross plate, and the loading head is connected to the lower surface of the loading plate.

[0009] When the second drive component drives the ball screw to rotate, the nut can move up and down along the axial direction of the ball screw, thereby driving the loading plate and loading head to move up and down.

[0010] The rotating worktable is rotatably connected to the upper surface of the base. A weighing sensor is provided at the bottom of the sample box. The weighing sensor is used to weigh the mass of the powder / particles in the sample box. The weighing sensor is electrically connected to an external control system.

[0011] The first driving component mainly consists of a first servo motor and a first reducer. The output shaft of the first servo motor is flange-connected to the input end of the first reducer. The output end of the first reducer is coaxially connected to the rotating shaft through a first coupling. The first reducer is fixedly connected to the upper surface of the base through a first motor mounting bracket. The first servo motor is electrically connected to an external control system.

[0012] The sample addition module also includes a bearing fixing block, which is set along the width direction of the base. The two ends of the bearing fixing block are respectively connected to the middle of the two side plates, and the bearing fixing block is located on the side of the side plate closer to the first driving component. A through hole is opened in the middle of the bearing fixing block, and the output end of the rotating shaft passes through the through hole of the bearing fixing block and is connected to the guide pipe.

[0013] The top of the side plate is provided with an adjustable block, and the two ends of the funnel are respectively connected to the two adjustable blocks, thereby realizing the adjustable angle of the funnel.

[0014] The second drive component mainly consists of a second servo motor and a second reducer. The output shaft of the second servo motor is flange-connected to the input end of the second reducer. The output end of the second reducer is coaxially connected to the screw of the ball screw through a second coupling. The second reducer is fixedly mounted on the top of the screw assembly mounting plate through a second motor mounting bracket. The second servo motor is electrically connected to an external control system.

[0015] The sample clamping module also includes aluminum profiles. Two aluminum profiles are symmetrically installed on the base along the width direction of the base, and the two aluminum profiles are respectively connected to the two sides of the lead screw assembly fixing plate.

[0016] This invention relates to a device suitable for preparing powder or granular samples where high uniformity and compaction are required. The sample addition module stores powder / granules, and the amount of powder or granular sample added each time can be controlled via a material addition component. The sample compaction module is equipped with a vertically movable loading head, which can be used to compact the powder / granules within the sample container. Through the coordinated operation of these two modules, the amount of material added at one time and the compaction force can be controlled according to experimental requirements, meeting the sample preparation needs of different samples.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The sample addition module in the device can ensure the amount of soil sample added at one time and the total filling mass; the pressure parameters applied by the sample compaction module can ensure the consistency of the compaction of multiple sample loadings; the coordinated work of the sample addition module and the sample compaction module can achieve the consistency of multiple sample preparations, ensuring that the test has good repeatability and success rate.

[0019] 2. This invention has the advantages of simple structure and convenient operation, which can meet the preparation of various powder and granular samples. It helps to reduce sample inhomogeneity caused by manual sample loading, thereby ensuring the consistency of test and reducing the impact of human contamination or special samples on the staff. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 This is a perspective view of the device of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall assembly of the powder and particle sample preparation device;

[0023] Figure 3 This is a schematic diagram of the installation of the rotary table and sample box;

[0024] Figure 4 This is a schematic diagram of the installation of the funnel guide tube and the rotating shaft;

[0025] Figure 5 This is a diagram illustrating the installation of the loading head;

[0026] In the diagram: 1. Base; 2. Lead screw assembly fixing plate; 3. Profile aluminum part; 4. Second motor fixing seat; 5. Second coupling; 6. Second reducer; 7. Second servo motor; 8. Profile corner piece; 9. Lead screw assembly; 9-1. Ball screw; 9-2. Guide rail; 9-3. Slider; 9-4. Connecting block; 9-5. Horizontal plate; 9-6. Bearing seat; 9-7. Loading plate; 9-8. Nut; 10. Pressure sensor; 11. Loading head; 12. Side plate; 13. Rotating shaft; 13-1. Groove; 14. First coupling; 15. First motor fixing seat; 16. First servo motor; 17. First reducer; 18. Bearing fixing block; 19. Guide tube; 20. Adjusting block; 21. Funnel; 22. Rotary worktable; 23. Sample box; 24. Weighing sensor. Detailed Implementation

[0027] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0028] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0029] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the device includes a sample adding module, a sample pressing module, a base 1, a rotating worktable 22, and a sample box 23. The sample adding module, the sample pressing module, and the rotating worktable 22 are all mounted on the base 1. The sample adding module and the sample pressing module are located on the left and right sides of the rotating worktable 22, respectively. The sample box 23 is fixedly connected to the upper surface of the rotating worktable 22. The sample adding module stores powder / particles and is used to add the powder / particles inside to the sample box 23. The sample pressing module is equipped with a loading head 11 that can move up and down. The loading head 11 is used to press the powder / particles in the sample box 23. Both the sample adding module and the sample pressing module are electrically connected to an external control system.

[0031] like Figure 4As shown, the sample addition module includes a first driving component, side plates 12, a rotating shaft 13, a guide tube 19, and a funnel 21. The first driving component is fixedly mounted on the base 1 via a first motor mounting bracket 15. The output end of the first driving component is coaxially connected to the rotating shaft 13, which is arranged along the length of the base 1. The first driving component is used to drive the rotating shaft 13 to rotate. Two side plates 12 are symmetrically mounted on the base 1 along the width of the base 1. The two ends of the funnel 21 are movably connected to the tops of the two side plates 12, respectively. Next, the funnel 21 stores powder / particles. The bottom of the funnel 21 is connected to the guide tube 19 with openings at the top and bottom. The lower part of the guide tube 19 has a through hole. The output end of the rotating shaft 13 passes through the through hole and is rotatably connected to the guide tube 19. The rotating shaft 13 and the guide tube 19 are connected in a cross shape. The through hole of the guide tube 19 is clearance-fitted with the rotating shaft 13. A groove 13-1 is provided at the connection position between the rotating shaft 13 and the guide tube 19. The powder / particles in the funnel 21 fall into the sample box 23 through the groove 13-1.

[0032] In practice, the size of the groove 13-1 is larger than the size of the powder and granules. The powder / granules in the funnel 21 fall into the groove 13-1 of the rotating shaft 13 through the guide tube 19. As the rotating shaft 13 continuously selects, the fine powder / granules in the groove 13-1 fall into the sample box 23 through the guide tube 19.

[0033] The sample clamping module includes a second drive component, a lead screw assembly fixing plate 2, a second motor fixing seat 4, a lead screw assembly 9, a pressure sensor 10, and a loading head 11. The lead screw assembly fixing plate 2 is vertically mounted on the upper surface of the base 1. The second drive component is fixedly mounted on the top of the lead screw assembly fixing plate 2 via the second motor fixing seat 4. The output end of the second drive component is connected to the lead screw assembly 9. The second drive component is used to drive the lead screw assembly 9 to move up and down, so that the lead screw assembly 9 is movably connected to the lead screw assembly fixing plate 2. The loading head 11 is fixedly connected to the lead screw assembly 9. The top of the loading head 11 is provided with a pressure sensor 10, which is connected to the control system.

[0034] like Figure 5 As shown, the lead screw assembly 9 includes a ball screw 9-1, a guide rail 9-2, a slider 9-3, a connecting block 9-4, a cross plate 9-5, a bearing seat 9-6, a loading plate 9-7, and a nut 9-8;

[0035] The bearing housing 9-6 is installed at the bottom of the screw assembly fixing plate 2. Two guide rails 9-2 are vertically connected to both sides of the screw assembly fixing plate 2. The slider 9-3 is movably connected to the guide rail 9-2. The two ends of the horizontally arranged cross plate 9-5 are fixedly connected to the two sliders 9-3 through connecting blocks 9-4. The output end of the second drive component is fixedly connected to the top end of the ball screw 9-1. The bottom end of the ball screw 9-1 is rotatably set in the bearing housing 9-6. The function of the bearing housing 9-6 is to limit the ball screw 9-1, ensure that the loading direction of the loading head 11 is fixed, and the ball screw 9-1 is set perpendicular to the base 1. The nut 9-8 is movably sleeved on the outer circumference of the ball screw 9-1. The nut 9-8 is connected to the middle of the cross plate 9-5. The loading plate 9-7 is fixedly installed on the cross plate 9-5. The loading head 11 is connected to the lower surface of the loading plate 9-7.

[0036] The ball screw 9-1 is used to convert rotary motion into linear motion. When the second drive component drives the ball screw 9-1 to rotate, the nut 9-8 can move up and down along the axial direction of the ball screw 9-1, thereby driving the loading plate 9-7 and the loading head 11 to move up and down.

[0037] The rotating worktable 22 is rotatably connected to the upper surface of the base 1. The bottom of the sample box 23 is equipped with a weighing sensor 24, which is used to weigh the mass of powder / particles in the sample box 23. The weighing sensor 24 is electrically connected to an external control system.

[0038] A weighing sensor 24 is installed at the bottom of the sample box 23 on the rotary worktable 22. When the weight reaches the set value, the first servo motor 16 in the sample adding module stops working, the rotating shaft 13 stops rotating, and no more powder or particles flow out of the funnel 21.

[0039] The first drive component mainly consists of a first servo motor 16 and a first reducer 17. The output shaft of the first servo motor 16 is flange-connected to the input end of the first reducer 17. The output end of the first reducer 17 is coaxially connected to the rotating shaft 13 through a first coupling 14. The first reducer 17 is fixedly connected to the upper surface of the base 1 through a first motor mounting seat 15. The first servo motor 16 is electrically connected to an external control system.

[0040] The sample addition module also includes a bearing fixing block 18, which is arranged along the width direction of the base 1. Both ends of the bearing fixing block 18 are connected to the middle of the two side plates 12 respectively, and the bearing fixing block 18 is located on the side of the side plate 12 closer to the first driving component. A through hole is opened in the middle of the bearing fixing block 18, and the output end of the rotating shaft 13 passes through the through hole of the bearing fixing block 18 and is connected to the guide pipe 19.

[0041] The top of the side plate 12 is provided with an adjustable block 20, and the two ends of the funnel 21 are respectively connected to two swingable adjustable blocks 20, thereby realizing the adjustable angle / position of the funnel 21.

[0042] The second drive component mainly consists of a second servo motor 7 and a second reducer 6. The output shaft of the second servo motor 7 is flange-connected to the input end of the second reducer 6. The output end of the second reducer 6 is coaxially connected to the ball screw 9-1 through the second coupling 5. The second reducer 6 is fixedly mounted on the top of the screw assembly fixing plate 2 through the second motor fixing seat 4. The second servo motor 7 is electrically connected to the external control system.

[0043] The sample clamping module also includes aluminum profiles 3. Two aluminum profiles 3 are symmetrically installed on the base 1 along the width direction of the base 1, and the two aluminum profiles 3 are respectively connected to the two sides of the lead screw assembly fixing plate 2.

[0044] A profile aluminum part 3 is also provided on the side away from the lead screw assembly fixing plate 2. The profile aluminum part 3 is used to prevent the lead screw assembly fixing plate 2 from tipping over and plays a reinforcing role.

[0045] The sample box 23 is placed on the rotary table 22 and rotates with the rotary table 22 to the set position. When the amount of powder or granules added during the sample filling process reaches the set value, the sample box 23 can be moved to the bottom of the loading head 11 of the sample pressing module by rotating the rotary table 22. The loading head 11 starts to load under the drive of the motor until the set pressure value is reached.

[0046] The working cycle between the sample adding module and the sample compaction module can be set to achieve automatic filling and compaction in a reciprocating motion, filling and compacting simultaneously to ensure the consistency of sample quality and compaction density across multiple loadings. It can also be used to ensure sample consistency through both sample quality control and force control.

[0047] The working process of the device of the present invention is as follows:

[0048] First, the sample box 23 is placed on the rotary table 22. When the rotary table 22 rotates the sample box 23 to below the funnel 21 of the sample adding module, the first servo motor 16 drives the rotating shaft 13 to rotate. The powder or particles in the groove of the rotating shaft 13 fall into the sample box 23 below the funnel 21. The weighing sensor 24 below the sample box 23 can provide real-time feedback on the sample mass to the control system. When the sample mass reaches a certain amount, the control system controls the first servo motor 16 to stop rotating, and the rotary table 22 rotates the sample box 23 into the sample pressing module. Below the loading head 11; under the rotation of the second servo motor, the drive screw assembly 9 drives the loading head 11 to move slowly downward, pressing the sample powder or particles in the sample box 23. The pressure sensor 10 connected above the loading head 11 can provide real-time feedback of the loading force. The sample compaction can be controlled by controlling the loading force. After the sample is compacted once, the rotating worktable 22 drives the sample box 24 to rotate again to the funnel 21 of the sample adding module for secondary sample loading. Then the compaction work is carried out in sequence. The sample preparation work can be completed through multiple rounds of work according to experimental needs.

[0049] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0050] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A sample preparation device suitable for powder and granular samples, characterized in that: The system includes a sample adding module, a sample pressing module, a base (1), a rotating worktable (22), and a sample box (23). The sample adding module, the sample pressing module, and the rotating worktable (22) are all mounted on the base (1). The sample adding module and the sample pressing module are located on opposite sides of the rotating worktable (22). The sample box (23) is fixedly connected to the upper surface of the rotating worktable (22). The sample adding module stores powder / particles and is used to add the powder / particles inside to the sample box (23). The sample pressing module is equipped with a loading head (11) that can move up and down and is used to press the powder / particles inside the sample box (23). The sample adding module and the sample pressing module are both electrically connected to an external control system. The sample addition module includes a first driving component, side plates (12), a rotating shaft (13), a guide tube (19), and a funnel (21). The first driving component is fixedly mounted on the base (1) via a first motor mounting bracket (15). The output end of the first driving component is coaxially connected to the rotating shaft (13). The first driving component is used to drive the rotating shaft (13) to rotate. Two side plates (12) are symmetrically mounted on the base (1) along the width direction of the base (1). The two ends of the funnel (21) are respectively connected to two... The top of the side plate (12) is connected to the funnel (21), which stores powder / particles. The bottom of the funnel (21) is connected to the guide tube (19). A through hole is provided at the bottom of the guide tube (19). The output end of the rotating shaft (13) passes through the through hole and is rotatably connected to the guide tube (19). A groove (13-1) is provided at the connection position between the rotating shaft (13) and the guide tube (19). The powder / particles in the funnel (21) fall into the sample box (23) through the groove (13-1). The rotating worktable (22) is rotatably connected to the upper surface of the base (1) along its own circumference. The bottom of the sample box (23) is provided with a weighing sensor (24), which is used to weigh the mass of powder / particles in the sample box (23). The weighing sensor (24) is electrically connected to the external control system.

2. The sample preparation device for powder and granular samples according to claim 1, characterized in that: The sample clamping module includes a second driving component, a lead screw assembly fixing plate (2), a second motor fixing seat (4), a lead screw assembly (9), a pressure sensor (10), and a loading head (11). The lead screw assembly fixing plate (2) is vertically mounted on the upper surface of the base (1). The second driving component is fixedly mounted on the top of the lead screw assembly fixing plate (2) through the second motor fixing seat (4). The output end of the second driving component is connected to the lead screw assembly (9). The second driving component is used to drive the lead screw assembly (9) to move up and down. The lead screw assembly (9) is movably connected to the lead screw assembly fixing plate (2). The loading head (11) is fixedly connected to the lead screw assembly (9). The top of the loading head (11) is provided with a pressure sensor (10). The pressure sensor (10) is connected to the control system.

3. The sample preparation device for powder and granular samples according to claim 2, characterized in that: The lead screw assembly (9) includes a ball screw (9-1), a guide rail (9-2), a slider (9-3), a connecting block (9-4), a cross plate (9-5), a bearing seat (9-6), a loading plate (9-7), and a nut (9-8). The bearing housing (9-6) is installed at the bottom of the screw assembly fixing plate (2). Two guide rails (9-2) are vertically connected to both sides of the screw assembly fixing plate (2). The slider (9-3) is movably connected to the guide rail (9-2). The two ends of the horizontal plate (9-5) are fixedly connected to the two sliders (9-3) through the connecting block (9-4). The output end of the second drive component is fixedly connected to the top end of the ball screw (9-1). The bottom end of the ball screw (9-1) is rotatably set in the bearing housing (9-6). The ball screw (9-1) is set perpendicular to the base (1). The nut (9-8) is movably sleeved on the outer periphery of the ball screw (9-1). The nut (9-8) is connected to the middle of the horizontal plate (9-5). The loading plate (9-7) is fixedly installed on the horizontal plate (9-5). The loading head (11) is connected to the lower surface of the loading plate (9-7). When the second drive component drives the ball screw (9-1) to rotate, the nut (9-8) can move up and down along the axial direction of the ball screw (9-1), thereby driving the loading plate (9-7) and the loading head (11) to move up and down.

4. The sample preparation device suitable for powder and granular samples according to claim 1, characterized in that: The first drive component mainly consists of a first servo motor (16) and a first reducer (17). The output shaft of the first servo motor (16) is flange-connected to the input end of the first reducer (17). The output end of the first reducer (17) is coaxially connected to the rotating shaft (13) through a first coupling (14). The first reducer (17) is fixedly connected to the upper surface of the base (1) through a first motor mounting bracket (15). The first servo motor (16) is electrically connected to an external control system.

5. A sample preparation device suitable for powder and granular samples according to claim 1, characterized in that: The sample addition module also includes a bearing fixing block (18), which is arranged along the width direction of the base (1). The two ends of the bearing fixing block (18) are respectively connected to the middle of the two side plates (12), and the bearing fixing block (18) is located on the side of the side plate (12) closer to the first driving component. A through hole is opened in the middle of the bearing fixing block (18), and the output end of the rotating shaft (13) passes through the through hole of the bearing fixing block (18) and is connected to the guide pipe (19).

6. A sample preparation device suitable for powder and granular samples according to claim 1, characterized in that: The top of the side plate (12) is provided with an adjustable block (20) with an adjustable angle. The two ends of the funnel (21) are respectively connected to the two adjustable blocks (20), thereby realizing the adjustable angle of the funnel (21).

7. A sample preparation device suitable for powder and granular samples according to claim 3, characterized in that: The second drive component mainly consists of a second servo motor (7) and a second reducer (6). The output shaft of the second servo motor (7) is flange-connected to the input end of the second reducer (6). The output end of the second reducer (6) is coaxially connected to the ball screw (9-1) through the second coupling (5). The second reducer (6) is fixedly installed on the top of the screw assembly fixing plate (2) through the second motor fixing seat (4). The second servo motor (7) is electrically connected to the external control system.

8. A sample preparation device suitable for powder and granular samples according to claim 3, characterized in that: The sample clamping module also includes profile aluminum parts (3), two profile aluminum parts (3) are symmetrically installed on the base (1) along the width direction of the base (1), and the two profile aluminum parts (3) are respectively connected to the two sides of the lead screw assembly fixing plate (2).

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