Sample preparation device

Abstract

The utility model discloses a sample preparation device, which belongs to the technical field of material sample preparation and comprises a supporting component, a pressing component, a limiting component and a pressing die, the pressing component is mounted below the supporting component, the limiting component is mounted on the supporting component, and the pressing die is mounted on the pressing component. The pressing mold comprises a first pressing piece, a second pressing piece and a sealing guide piece, the sealing guide piece is arranged at the output end of the pressing assembly, the sealing guide piece is provided with an opening, the second pressing piece is located in the opening and is in sliding connection with the inner wall of the sealing guide piece, and a sealed compression cavity is formed between the lower end of the second pressing piece and the bottom wall of the sealing guide piece; the first end of the first pressing piece is used for abutting against the upper end of the second pressing piece, and the second end of the first pressing piece is used for abutting against the limiting assembly. The pressing assembly is started, the lower end of the second pressing piece and the bottom wall of the sealing guide piece extrude the sample preparation material in the sealed compression cavity, and the sample preparation material is prevented from flying down after being extruded.

Description

Technical Field

[0001] This utility model relates to the technical field of material sample preparation, and in particular to a sample preparation device. Background Technology

[0002] Differential scanning calorimetry (DSC) is a highly efficient research tool for characterizing the thermal properties and thermal reactions of materials. It has advantages such as ease of operation, wide application, and clear physical meaning of measured values. It can be used to measure the melting temperature, crystallization temperature, glass transition temperature, etc. of materials. During the measurement process, the heat absorbed or released by the material can be measured to obtain the heat of fusion, heat of crystallization, heat of decomposition, specific heat capacity, activation energy, and transformation entropy of the material. It has wide applications in materials, chemical industry, petroleum, biology, pharmaceuticals and other fields.

[0003] Differential scanning calorimetry (DSC) uses a crucible as the sample container. Before testing, an appropriate amount of sample must be weighed and placed in the crucible. The sample mass has a certain impact on the test results. Generally, the sample volume should not exceed 2 / 3 of the crucible volume. The mass of organic samples is 5–10 mg, and the mass of inorganic samples is 10–50 mg. However, for powder samples such as graphene, graphene oxide, fluorinated graphene, carbon nanotubes, aerogels, and expanded graphite, their density is very low and their mass is very light. Some sample preparation materials, even when filling the crucible, are less than 1 mg. Too little sample mass will lead to low signal sensitivity and inaccurate test results. Furthermore, when processing and compressing sample preparation materials with particularly light mass and low density, the sample material is prone to falling off and is not easy to compact. Summary of the Invention

[0004] The purpose of this invention is to improve the problem that existing sample preparation materials with small mass and low density are not easy to process and compress, and to provide a sample preparation device.

[0005] The technical solutions for achieving the above objectives include the following:

[0006] Sample preparation apparatus, including:

[0007] The package includes a support component, a pressing component, a limiting component, and a pressing mold. The pressing component is installed below the support component, the limiting component is installed on the support component, and the pressing mold is installed on the pressing component and detachably disposed between the limiting component and the pressing component.

[0008] The pressing mold includes a first pressing component, a second pressing component, and a sealing guide component. The sealing guide component is disposed at the output end of the pressing assembly. The sealing guide component has an opening. The second pressing component is located in the opening and is slidably connected to the inner wall of the sealing guide component. A sealed compression chamber is formed between the lower end of the second pressing component and the bottom wall of the sealing guide component.

[0009] The first end of the first pressing member is used to abut against the upper end of the second pressing member, and the second end of the first pressing member is used to abut against the limiting component.

[0010] In one embodiment, the sealing guide includes a guide cylinder and a pressing seat. The opening extends from the top of the guide cylinder to the bottom of the guide cylinder. The lower end of the pressing seat is disposed on the output end of the pressing assembly. The pressing seat is installed on the lower end of the guide cylinder and has a boss located inside the opening. The compression chamber is formed between the boss, the second pressing member, and the inner wall of the guide cylinder.

[0011] In one embodiment, the guide cylinder further has an exhaust channel, one end of which is connected to the compression chamber;

[0012] The exhaust channel is located near the lower end of the guide cylinder.

[0013] In one embodiment, the outer diameter of the second pressing member is less than or equal to the inner diameter of the opening, and the outer diameter of the end of the first pressing member that abuts against the second pressing member is less than the outer diameter of the second pressing member.

[0014] In one embodiment, the first pressing member is a nail structure, wherein the outer diameter of the first end of the nail structure is smaller than the outer diameter of its second end.

[0015] In one embodiment, the pressing assembly includes a hydraulic pump, a solenoid directional valve, an oil tank, a hydraulic cylinder, a connecting pipe, and a piston. The hydraulic pump, solenoid directional valve, oil tank, hydraulic cylinder, and connecting pipe are all disposed within a support assembly. The first and second ends of the solenoid directional valve are connected to the hydraulic pump and the oil tank respectively via the connecting pipe. The third and fourth ends of the solenoid directional valve are connected to the outlet and inlet of the hydraulic cylinder respectively via the connecting pipe. The first end of the piston is mounted on the hydraulic cylinder. The support assembly has a port for piston movement. The sealing guide is detachably mounted on the second end of the piston.

[0016] In one embodiment, the limiting component includes a lead screw and a drive block. The first end of the lead screw passes through a support component and is threadedly connected to the inner wall of the support component. The drive block is installed at the second end of the lead screw and is disposed near the outer wall of the lead screw.

[0017] In one embodiment, the support assembly includes a housing, a first support plate, a second support plate, and a support column. A first end of the first support plate is mounted on the housing, and the second support plate is mounted on the second end of the first support plate. A bending structure is formed between the first support plate and the second support plate. A first end of the support column is mounted on the lower end of the second support plate, and a second end of the support column is mounted on the housing.

[0018] In one embodiment, the sample preparation device further includes a control panel, which has a control circuit board, a display panel, and control keys. The control circuit board is installed inside the support assembly and is electrically connected to the pressing assembly. The display panel and control keys are both installed on the outer surface of the housing, and the control keys are electrically connected to the control circuit board.

[0019] In one embodiment, the sample preparation device further includes a sample preparation seat, a first end of which is detachably disposed on a pressing assembly, and a second end of which has a pressing groove, the opening of which faces the limiting assembly.

[0020] The technical solution provided by this utility model has the following advantages and effects:

[0021] When the pressing component is activated, it drives the sealing guide to move upward. Since the second pressing component abuts against the limiting component through the first pressing component, the lower end of the second pressing component and the bottom wall of the sealing guide extruded the sample material in the compression chamber. After the sample material was extruded, the volume of the sample decreased and the density increased. Moreover, the compression chamber was sealed to prevent the sample material from flying off after being extruded. Attached Figure Description

[0022] The accompanying drawings illustrate specific examples of the technical solutions described in this utility model, and together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this utility model.

[0023] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0024] Figure 1 This is a schematic diagram of a sample preparation device in one embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the sample preparation device in one embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of a pressing mold in one embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the pressing component in one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the cooperation between the sample holder and the limiting component in one embodiment of this utility model;

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Sample preparation device; 1. Support assembly; 11. Outer shell; 12. First support plate; 13. Second support plate; 14. Support column; 2. Limiting assembly; 21. Drive block; 22. Lead screw; 3. Control panel; 31. Display panel; 32. Control keys; 4. Pressing assembly; 41. Hydraulic pump; 42. Throttle valve; 43. Solenoid directional valve; 44. Oil tank; 45. Hydraulic cylinder; 451. Piston; 46. Connecting pipe; 5. Pressing mold; 50. Sealing guide; 51. Guide cylinder; 52. First pressing component; 53. Opening; 54. Second pressing component; 55. Compression chamber; 56. Exhaust channel; 57. Pressing seat; 61. Crucible; 62. Crucible cover; 7. Sample preparation seat; 71. Pressing groove. Detailed Implementation

[0031] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0032] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0033] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0034] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0035] This utility model proposes a sample preparation device 100, such as... Figures 1 to 3As shown, the assembly includes a support component 1, a pressing component 4, a limiting component 2, and a pressing mold 5. The pressing component 4 is installed below the support component 1, the limiting component 2 is installed on the support component 1, and the pressing mold 5 is installed on the pressing component 4 and detachably disposed between the limiting component 2 and the pressing component 4. The pressing mold 5 includes a first pressing member 52, a second pressing member 54, and a sealing guide member 50. The sealing guide member 50 is disposed at the output end of the pressing component 4 and has an opening 53. The second pressing member 54 is located in the opening 53 and is slidably connected to the inner wall of the sealing guide member 50. A sealed compression chamber 55 is formed between the lower end of the second pressing member 54 and the bottom wall of the sealing guide member 50. The first end of the first pressing member 52 is used to abut against the upper end of the second pressing member 54, and the second end of the first pressing member 52 is used to abut against the limiting component 2.

[0036] Specifically, the opening 53 of the pressing mold 5 is used to place the sample preparation material, which enters the compression chamber 55. The sample preparation material includes graphene, graphene oxide, fluorinated graphene, carbon nanotubes, aerogel, expanded graphite, etc. Then, the lower end of the pressing mold 5 is positioned at the output end of the pressing assembly 4, and the limiting assembly 2 abuts against the upper end of the pressing mold 5, limiting the pressing mold 5. The pressing assembly 4 is activated, driving the sealing guide 50 to move upward. Since the second pressing member 54 abuts against the limiting assembly 2 through the first pressing member 52, the lower end of the second pressing member 54 and the bottom wall of the sealing guide 50 compress the sample preparation material in the compression chamber 55. After the sample preparation material is compressed, the sample volume decreases and the density increases. Moreover, the compression chamber 55 is sealed, preventing the sample preparation material from flying off after being compressed. If the required sample cannot be squeezed out in one go, sample preparation material can be added to the compression chamber 55 and the sample preparation material can be squeezed repeatedly to compress the sample preparation material into the required sample, thereby improving the problem that the existing sample preparation material with small mass and low density is not easy to process and compress.

[0037] Furthermore, the first pressing member 52 and the second pressing member 54 are manufactured separately. During assembly, the sample material can be placed in the compression chamber 55 first, and then the second pressing member 54 can be assembled. The upper end of the first pressing member 52 abuts against the limiting component 2, and the lower end of the first pressing member 52 has more flexible contact with the second pressing member 54. Precise positioning is not required. Simply abutting against each other is enough to compress the sample material in the compression chamber 55, thereby improving the sample preparation efficiency of the sample preparation device 100.

[0038] Furthermore, the sealing guide 50 has a first moving position and a second moving position. When the sealing guide 50 moves to the first moving position, the second pressing member 54 squeezes the sample material in the sealed compression chamber 55. When the sealing guide 50 moves to the second moving position, the sealing guide 50, the first pressing member 52, and the second pressing member 54 can be removed from the pressing assembly, and then the sample in the pressing mold 5 can be taken out and placed in the test container (crucible 61). The pressing assembly 4 is connected to an external socket via a power cord to provide power to the pressing assembly 4.

[0039] In some embodiments, the sealing guide 50 includes a guide cylinder 51 and a pressing seat 57. An opening 53 extends from the top of the guide cylinder 51 to the bottom of the guide cylinder 51. The pressing seat 57 is disposed on the output end of the pressing assembly 4. The upper end of the pressing seat 57 is disposed at the lower end of the guide cylinder 51. The pressing seat 57 has a boss located inside the opening 53. A compression chamber 55 is formed between the boss, the second pressing member 54, and the inner wall of the guide cylinder 51. Specifically, the pressing seat 57 is set at the lower end of the guide cylinder 51, and a boss is used to position the pressing seat 57 and the guide cylinder 51, so that the boss limits the guide cylinder 51 and improves the stability of the fit between the pressing seat 57 and the guide cylinder 51. Moreover, after the second pressing member 54 squeezes the sample material in the sealed compression chamber 55, the pressing mold 5 is removed, and after the guide cylinder 51 is separated from the pressing seat 57, the sample can be directly removed from the pressing seat 57, improving the convenience of operating the pressing mold 5.

[0040] To improve the airtightness of the compression chamber 55 and reduce the gap between the inner wall of the guide cylinder 51 and the second pressing member 54, preferably, the guide cylinder 51 also has an exhaust channel 56, one end of which is connected to the compression chamber 55; the exhaust channel 56 is located near the lower end of the guide cylinder 51. When the second pressing member 54 squeezes the sample material in the compression chamber 55, the air in the compression chamber 55 is discharged through the exhaust channel 56, avoiding the second pressing member 54 being unable to process the sample material due to gas obstruction in the compression chamber 55. This allows the outer wall of the second pressing member 54 to fit against the inner wall of the guide cylinder 51, ensuring that all the sample material in the compression chamber 55 is squeezed, further improving processing efficiency.

[0041] Preferably, the outer diameter of the second pressing member 54 is less than or equal to the inner diameter of the opening 53, and the outer diameter of the end of the first pressing member 52 that abuts against the second pressing member 54 is less than the outer diameter of the second pressing member 54. Specifically, the outer diameter of the second pressing member 54 is equal to the inner diameter of the opening 53, and the outer wall of the second pressing member 54 fits against the inner wall of the opening 53, so that the sample material in the compression chamber 55 can be squeezed by the second pressing member 54; the outer diameter of the end of the first pressing member 52 that abuts against the second pressing member 54 is less than the outer diameter of the second pressing member 54, so that the first pressing member 52 can also abut against the second pressing member 54 inside the opening 53, satisfying the requirement that the first pressing member 52 squeezes the second pressing member 54 inside the opening 53.

[0042] Preferably, the first pressing member 52 is a nail structure, with the outer diameter of the first end of the nail structure being smaller than the outer diameter of its second end. Specifically, the outer diameter of the second end of the nail structure is larger, which can increase the contact area between the nail structure and the limiting component 2, and improve the stability of the nail structure during compression. The first end of the nail structure is used to pass through the opening 53 into the guide cylinder 51 and act on the second pressing member 54.

[0043] Preferred, such as Figure 4 As shown, the pressing assembly 4 includes a hydraulic pump 41, a throttle valve 42, a solenoid directional valve 43, an oil tank 44, a hydraulic cylinder 45, a connecting pipe 46, and a piston 451. The hydraulic pump 41, throttle valve 42, solenoid directional valve 43, oil tank 44, hydraulic cylinder 45, and connecting pipe 46 are all housed within the support assembly 1. The first and second ends of the solenoid directional valve 43 are connected to the hydraulic pump 41 and oil tank 44 respectively via the connecting pipe 46; the third and fourth ends of the solenoid directional valve 43 are connected to the outlet and inlet of the hydraulic cylinder 45 respectively via the connecting pipe 46; the throttle valve 42 is mounted on the connecting pipe 46; the first end of the piston 451 is mounted on the hydraulic cylinder 45; the support assembly 1 has a port for the piston 451 to move; and a sealing guide 50 is detachably mounted on the second end of the piston 451. Specifically, the hydraulic pump 41 converts the mechanical energy of the electric motor into the pressure energy of the liquid. The liquid is transported to the hydraulic cylinder 45 through the connecting pipe 46, generating pressure and pushing the piston 451 to move and perform work. After the piston 451 completes its work, the liquid returns to the oil tank 44 through the connecting pipe 46, completing the liquid circulation; the solenoid directional valve 43 can control the flow direction of the hydraulic oil in the connecting pipe 46, further enabling the hydraulic oil to enter the hydraulic cylinder 45 or return to the oil tank 44.

[0044] Furthermore, the throttle valve 42 functions to control the working pressure and speed of the hydraulic system. By adjusting the opening area of ​​the throttle valve 42, the speed at which hydraulic oil flows through it can be controlled, thereby achieving precise control of the working pressure and speed of the hydraulic system. When the opening area of ​​the throttle valve 42 decreases, the speed at which hydraulic oil flows through it slows down, resulting in an increase in the system's working pressure; conversely, when the opening area increases, the system's working pressure decreases. In addition, the throttle valve 42 can also prevent hydraulic shocks, protect the safe operation of the system, and balance the flow in a multi-pipe system, improving overall efficiency and stability.

[0045] In some embodiments, the limiting component 2 includes a lead screw 22 and a drive block 21. The first end of the lead screw 22 passes through the support component 1 and is threadedly connected to the inner wall of the support component 1. The drive block 21 is installed on the second end of the lead screw 22 and is disposed near the outer wall of the lead screw 22. Specifically, the lead screw 22 is driven to rotate by holding the drive block 21. After the lead screw 22 rotates, the position of the first end of the lead screw 22 is adjusted to facilitate the installation of the pressing mold 5 on the pressing component 4. When the sealing guide 50 of the pressing mold 5 is pressed by the pressing component 4, the first pressing member 52 of the pressing mold 5 abuts against the first end of the lead screw 22. The first end of the lead screw 22 restricts the movement of the first pressing member 52, so that the first pressing member 52 cooperates with the second pressing member 54 to complete the pressing operation. It should be noted that the axial force of the lead screw 22 cannot drive the lead screw 22 to rotate. Therefore, the lead screw 22 is in a relatively stable state when stationary.

[0046] Preferably, the support assembly 1 includes a housing 11, a first support plate 12, a second support plate 13, and a support column 14. The first end of the first support plate 12 is mounted on the housing 11, and the second support plate 13 is mounted on the second end of the first support plate 12, forming a bent structure between the first support plate 12 and the second support plate 13. The first end of the support column 14 is mounted on the lower end of the second support plate 13, and the second end of the support column 14 is mounted on the housing 11. Specifically, the housing 11 is used to accommodate the pressing assembly 4, concealing the pressing assembly 4 within the housing 11 to prevent it from being exposed. Furthermore, the housing 11 supports the first support plate 12 and the support column 14. The second support plate 13 is mounted on the support column 14 and the first support plate 12, and the second support plate 13 is used to mount the limiting assembly 2, improving the stability of the limiting assembly 2.

[0047] Preferably, the second support plate 13 is thicker and has a longer internal thread. Increasing the length of the threaded engagement between the second support plate 13 and the lead screw 22 and increasing the threaded engagement area can increase the friction between the second support plate 13 and the lead screw 22, thereby further improving the stability of the lead screw 22.

[0048] Preferably, the sample preparation device 100 further includes a control panel 3, which has a control circuit board, a display panel 31, and control keys 32. The control circuit board is installed inside the support assembly 1 and is electrically connected to the pressing assembly 4. The display panel 31 and the control keys 32 are both installed on the outer surface of the housing 11, and the control keys 32 are electrically connected to the control circuit board. Specifically, the control keys 32 control the pressing assembly 4 through the control circuit board, thereby adjusting the pressure and pressing time of the pressing assembly 4, so that the pressing assembly 4 can process according to the characteristics of the sample preparation material. It can also be used to control the starting or stopping of the pressing assembly 4. The display panel 31 is used to display the pressure and pressing time of the pressing assembly 4, so that the operator can observe the processing status of the pressing assembly 4 in a timely manner.

[0049] Preferred, such as Figure 5 As shown, the sample preparation device 100 also includes a sample preparation seat 7. The first end of the sample preparation seat 7 is detachably mounted on the pressing assembly 4, and the second end of the sample preparation seat 7 has a pressing groove 71, the opening of which faces the limiting assembly 2. The sample preparation device 100 also includes a crucible 61 and a crucible cover 62. The crucible 61 is installed in the pressing groove 71, and the bottom wall of the crucible 61 is in contact with the bottom wall of the pressing groove 71. The crucible 61 has a receiving groove. The first end of the crucible cover 62 is mounted on the crucible 61 and is used to seal the opening of the receiving groove. The second end of the crucible cover 62 is used to abut against the limiting assembly 2. After pressing, the sample is placed in the crucible 61, and then the crucible 61 is placed in the pressing groove 71. The limiting assembly 2 limits the crucible cover 62. The pressing assembly 4 drives the sample preparation seat 7 to move, so that the crucible 61 and the crucible cover 62 are pressed together to form an integral structure, which is convenient for placing into the differential scanning calorimeter to test the sample.

[0050] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0051] The purpose of the above embodiments is to reproduce and derive the technical solution of this utility model by way of example, and to fully describe the technical solution, purpose and effect of this utility model. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of this utility model, and it is not intended to limit the protection scope of this utility model.

[0052] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A sample preparation device, characterized by, The application relates to a sample preparation device. The device comprises a supporting assembly, a pressing assembly, a limiting assembly and a pressing die. The pressing die comprises a first pressing piece, a second pressing piece and a sealing guide piece. The sealing guide piece is arranged at the output end of the pressing assembly.

2. The sample preparation device of claim 1, wherein The sealing guide piece has an opening.

3. The sample preparation device of claim 2, wherein, The second pressing piece is arranged in the opening and is in sliding connection with the inner wall of the sealing guide piece. The lower end of the second pressing piece and the bottom wall of the sealing guide piece form a sealed compression chamber.

4. The sample preparation device of claim 1, wherein, The first end of the first pressing piece is used for abutting against the upper end of the second pressing piece.

5. The sample preparation device of claim 4, wherein The second end of the first pressing piece is used for abutting against the limiting assembly.

6. The sample preparation device of any one of claims 1 to 5, wherein, The sealing guide piece comprises a guide cylinder and a pressing seat body.

7. The sample preparation device of any one of claims 1 to 5, wherein, The opening is arranged from the top of the guide cylinder to the bottom of the guide cylinder.

8. The sample preparation device of any one of claims 1 to 5, wherein, The lower end of the pressing seat body is arranged on the output end of the pressing assembly.

9. The sample preparation device of any one of claims 1 to 5, wherein, The pressing seat body is arranged on the lower end of the guide cylinder. The pressing seat body has a boss. The boss is arranged in the opening. The boss, the second pressing piece and the inner wall of the guide cylinder form the compression chamber. The guide cylinder also has an exhaust passage. One end of the exhaust passage is in communication with the compression chamber. The exhaust passage is arranged close to the lower end of the guide cylinder. The outer diameter of the second pressing piece is less than or equal to the inner diameter of the opening. The outer diameter of the first end of the first pressing piece is less than the outer diameter of the second end of the first pressing piece. The first pressing piece is a nail body structure. The outer diameter of the first end of the nail body structure is less than the outer diameter of the second end of the nail body structure. The pressing assembly comprises a hydraulic pump, an electromagnetic reversing valve, an oil tank, a hydraulic cylinder, a connecting pipe and a piston. The hydraulic pump, the electromagnetic reversing valve, the oil tank and the hydraulic cylinder are arranged in the supporting assembly. The first end and the second end of the electromagnetic reversing valve are connected with the hydraulic pump and the oil tank through the connecting pipe. The third end and the fourth end of the electromagnetic reversing valve are connected with the outlet and the inlet of the hydraulic cylinder through the connecting pipe. The first end of the piston is arranged on the hydraulic cylinder. The supporting assembly has a through hole for the movement of the piston. The sealing guide piece is detachably arranged on the second end of the piston. The limiting assembly comprises a lead screw and a driving block. The first end of the lead screw passes through the supporting assembly and is in threaded connection with the inner wall of the supporting assembly. The driving block is arranged on the second end of the lead screw and is arranged close to the outer wall of the lead screw. The supporting assembly comprises a shell, a first supporting plate, a second supporting plate and a supporting column. The first end of the first supporting plate is arranged on the shell. The second supporting plate is arranged on the second end of the first supporting plate. The first supporting plate and the second supporting plate form a bending structure. The first end of the supporting column is arranged on the lower end of the second supporting plate. The second end of the supporting column is arranged on the shell. The sample preparation device also comprises a control panel. The control panel has a control circuit board, a display board and control keys. The control circuit board is arranged in the supporting assembly and is electrically connected with the pressing assembly. The display board and the control keys are arranged on the outer surface of the shell. The control keys are electrically connected with the control circuit board.

10. The sample preparation device of any one of claims 1 to 5, wherein, The sample preparation device further comprises a sample preparation seat, a first end of the sample preparation seat is detachably arranged on the pressing assembly, and a second end of the sample preparation seat is provided with a pressing groove, an opening of the pressing groove faces the limiting assembly.

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