A grinding device for preventing cross contamination

Abstract

The application discloses a grinding device capable of preventing cross contamination, and belongs to the field of laboratory sample pretreatment equipment. The grinding device comprises a bowl body, a cover body arranged on the bowl body, a pestle rod inserted into the bowl body, and a control unit arranged on the cover body. A detachable disposable inner sleeve matched with the inner wall of the bowl body is arranged in the bowl body. The inner wall of the disposable inner sleeve is a multilayer stepped annular grinding surface. When grinding different samples, only the disposable inner sleeve needs to be replaced and placed in the bowl body and matched with the inner wall of the bowl body, and then grinding is performed, so that mutual contamination between samples is fundamentally avoided, and the purity and accuracy of experiments are ensured. In addition, the unique multilayer stepped annular grinding surface design is matched with different roughness, so that an operator can systematically perform a process from coarse crushing to fine grinding, and the grinding efficiency and uniformity are improved.

Description

Technical Field

[0001] This application relates to the technical field of laboratory sample pretreatment equipment, specifically a grinding device to prevent cross-contamination. Background Technology

[0002] A mortar and pestle is a common tool used in laboratories for grinding and mixing solid samples. A traditional mortar and pestle typically consists of a bowl and a pestle, and is usually made of agate, ceramic, or glass.

[0003] When grinding different samples, even after cleaning, tiny sample particles may still remain in the tiny pores on the inner wall of the mortar, leading to contamination of subsequent samples and seriously affecting the accuracy of experimental results. This is especially true in trace analysis and grinding samples with different properties (such as chemical properties, color, and toxicity). Changing to different mortars is inefficient, costly, and impractical.

[0004] Therefore, this application provides a grinding apparatus to prevent cross-contamination, thereby solving the above-mentioned problems. Utility Model Content

[0005] This application provides a grinding device to prevent cross-contamination, aiming to solve the problems mentioned in the background art, such as the easy cross-contamination and high replacement cost when grinding different products with existing mortars.

[0006] To achieve the above objectives, this application provides the following technical solution: a grinding device for preventing cross-contamination, comprising a bowl body, a cover body disposed on the bowl body, a pestle inserted into the bowl body, and a control unit disposed on the cover body:

[0007] The bowl body is provided with a removable disposable inner liner that fits the inner wall of the bowl body. The inner wall of the disposable inner liner is a multi-layered stepped annular grinding surface, and the surface roughness of each layer of the annular grinding surface is different. The roughness of the multi-layered stepped annular grinding surface increases from top to bottom.

[0008] The cover is positioned on top of the disposable inner liner, and a hole for inserting a pestle is provided in the center of the cover. Thus, during use, by employing a removable disposable inner liner, different disposable inner liners can be simply replaced and placed inside the grinding bowl, fitting snugly against the inner wall, before grinding. This fundamentally avoids cross-contamination between samples, ensuring the purity and accuracy of the experiment. Furthermore, the unique multi-layered, stepped annular grinding surface design, combined with different roughness levels, allows the operator to systematically perform the process from coarse crushing to fine grinding, improving grinding efficiency and uniformity.

[0009] Preferably, in order to stabilize the disposable inner liner, a support ring adapted to the top of the bowl is fixedly installed on the top of the disposable inner liner. A positioning rod is fixedly installed on the support ring. A positioning hole adapted to the positioning rod is opened on the bowl. The positioning rod is inserted into the positioning hole, so that the disposable inner liner will not rotate during grinding, which is stable and reliable.

[0010] Preferably, in order to display specific pressure, the pestle includes a grinding part and a handle. One end of the grinding part is fixedly installed with a T-shaped protrusion. The end of the handle is provided with a groove that matches the protrusion. The protrusion is inserted into the groove. The end of the protrusion is fixedly installed with a pressure sensor that abuts against the groove, which is beneficial to the repeatability of the experiment and the comparability of the data.

[0011] Preferably, to enhance the user experience, a display screen electrically connected to the control unit is fixedly installed on the cover, and the pressure sensor is signal-connected to the control unit, making it more intuitive and efficient, and improving the intelligence of the device and the user experience.

[0012] Preferably, for quick replacement of the sieve mesh size, the grinding device also includes an adjustable filter mechanism. The adjustable filter mechanism includes a filter frame disposed at the bottom of the bowl, and the filter frame has an adjustment chamber. A movable support plate made of the same material as the bowl is slidably installed in the adjustment chamber through an intelligent drive component. The movable support plate has a leakage hole, and a combined filter is fixedly installed on the movable support plate. The mesh size of the combined filter gradually increases from one end to the other along the long side. The bottom of the bowl and the disposable inner liner is designed to be open, and the bottom of the bowl and the disposable inner liner are tightly fitted to the surface of the combined filter, thereby achieving precise control of the grinding fineness.

[0013] Preferably, for rapid adjustment, the intelligent drive component includes a servo motor fixedly installed on the outer wall of one end of the filter frame. The servo motor is signal-connected to the control unit. A lead screw, coaxially fixedly connected to the output end of the servo motor, is rotatably installed inside the adjustment chamber. The lead screw is screwed to a movable support plate. The control unit determines the mesh size to be used based on the stroke data.

[0014] Preferably, in order to stabilize the bowl, support blocks are fixedly installed at both ends of the bottom of the filter frame, and a positioning frame with a bowl-shaped structure adapted to the outer wall of the bowl is fixedly installed at the center above the combined filter screen on the filter frame. The bowl is detachably inserted into the positioning frame to prevent the bowl from shifting during grinding, ensuring stability and reliability.

[0015] This grinding device, by employing a removable disposable inner liner, allows for easy replacement of different disposable inner liners when grinding different samples. These liners are placed inside the grinding bowl and adhere to the inner wall before grinding, fundamentally preventing cross-contamination between samples and ensuring the purity and accuracy of the experiment. Furthermore, the unique multi-layered stepped annular grinding surface design, combined with different roughness levels, enables the operator to systematically perform the process from coarse crushing to fine grinding, improving grinding efficiency and uniformity.

[0016] This grinding device, controlled by an intelligent drive component, moves a movable support plate on a filter frame to adjust the required mesh size. This movement causes the combined filter screen to move at the bottom of the bowl and disposable inner liner, ensuring the desired mesh size is adhered to the bottom of the bowl and disposable inner liner. This allows the powder that has reached the target fineness to be sieved and collected in a timely manner, avoiding over-grinding or uneven fineness and achieving precise control of the grinding fineness. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of a grinding device to prevent cross-contamination.

[0018] Figure 2 A schematic diagram of the bottom structure of a grinding device to prevent cross-contamination;

[0019] Figure 3 This is a schematic cross-sectional view of a grinding device designed to prevent cross-contamination.

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0022] Figure 6 This is an electrical connection block diagram of a grinding device to prevent cross-contamination.

[0023] In the picture:

[0024] 1. Bowl body; 11. Disposable inner liner; 12. Annular grinding surface; 13. Support ring; 14. Positioning rod; 15. Positioning hole; 2. Cover body; 21. Hole; 3. Pestle; 31. Grinding part; 32. Handle; 33. Snap protrusion; 34. Snap groove; 35. Pressure sensor; 4. Control unit; 41. Display screen; 5. Adjustable filter screen mechanism; 51. Filter frame; 52. Adjustment chamber; 53. Intelligent drive component; 531. Servo motor; 532. Lead screw; 54. Movable support plate; 55. Leakage hole; 56. Combined filter screen; 57. Support block; 58. Positioning frame. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Example 1

[0027] This embodiment provides a grinding device to prevent cross-contamination, such as... Figure 1-6 As shown, the grinding device includes a bowl body 1, a cover body 2 disposed on the bowl body 1, a pestle 3 inserted into the bowl body 1, and a control unit 4 disposed on the cover body 2.

[0028] The bowl 1 is provided with a detachable disposable inner liner 11 that is adapted to the inner wall of the bowl 1. The inner wall of the disposable inner liner 11 is a multi-layer stepped annular grinding surface 12, and the surface roughness of each annular grinding surface 12 is different. The roughness of the multi-layer stepped annular grinding surface 12 increases from top to bottom.

[0029] The cover 2 is placed on top of the disposable inner liner 11, and the center of the cover 2 has a hole 21 for inserting the pestle 3.

[0030] In use, by employing a removable disposable inner liner 11, different disposable inner liners 11 can be replaced and placed inside the bowl 1 to fit against the inner wall of the bowl 1 when grinding different samples. This fundamentally avoids cross-contamination between samples, ensuring the purity and accuracy of the experiment. Furthermore, the unique multi-layered stepped annular grinding surface 12 design, combined with different roughness, allows the operator to systematically carry out the process from coarse crushing to fine grinding, improving grinding efficiency and uniformity.

[0031] It should be noted that the disposable inner liner 11 is made of PTFE. PTFE material has stable chemical properties, does not adhere to samples, is inexpensive, and is easy to replace.

[0032] Specifically, a support ring 13 that matches the top of the bowl 1 is fixedly installed on the top of the disposable inner liner 11. A positioning rod 14 is fixedly installed on the support ring 13. A positioning hole 15 that matches the positioning rod 14 is opened on the bowl 1. The positioning rod 14 is inserted into the positioning hole 15.

[0033] When using, the disposable inner liner 11 can be easily and quickly removed and installed by means of the support ring 13. During installation, the positioning rod 14 on the support ring 13 is aligned with the positioning hole 15 on the bowl body 1 and inserted to complete the fixation, so that the disposable inner liner 11 will not rotate during grinding, which is stable and reliable. During disassembly, the support ring 13 can be quickly removed by simply pulling it up from the edge of the bowl body 1.

[0034] More specifically, the pestle 3 includes a grinding part 31 and a handle 32. One end of the grinding part 31 is fixedly installed with a T-shaped protrusion 33. The end of the handle 32 is provided with a groove 34 that matches the protrusion 33. The protrusion 33 is inserted into the groove 34. The end of the protrusion 33 is fixedly installed with a pressure sensor 35 that abuts against the groove 34.

[0035] When using the pestle 3 to grind the material, the palm holds the handle 32 and presses down the grinding part 31 against the inner wall of the disposable inner liner 11. The handle 32 squeezes the pressure sensor 35 on the grinding part 31 to measure the grinding force, which changes the grinding process from relying on experience to a quantifiable and standardized operation, which is beneficial to the repeatability of experiments and the comparability of data.

[0036] Furthermore, a display screen 41 electrically connected to the control unit 4 is fixedly installed on the cover 2, and the pressure sensor 35 is signal connected to the control unit 4.

[0037] During use, the data measured by the pressure sensor 35 is transmitted to the control unit 4 via a signal. The control unit 4 then transmits the data to the display screen 41 to provide real-time feedback on the grinding intensity, making it more intuitive and efficient, and enhancing the intelligence of the equipment and the user experience.

[0038] Example 2

[0039] Unlike Example 1, when screening materials, grinding materials of different mesh sizes require different mesh sizes for filtration, which is inconvenient and inefficient. Therefore, the grinding device also includes an adjustable filter mechanism 5. The adjustable filter mechanism 5 includes a filter frame 51 set at the bottom of the bowl 1. The filter frame 51 has an adjustment cavity 52. ​​A movable support plate 54 made of the same material as the bowl 1 is slidably installed in the adjustment cavity 52 through an intelligent drive component 53. The movable support plate 54 has a leakage hole 55. A combined filter 56 is fixedly installed on the movable support plate 54. The mesh size of the combined filter 56 gradually increases from one end to the other along the long side. The bottom of the bowl 1 and the disposable inner liner 11 is designed to be open. The bottom of the bowl 1 and the disposable inner liner 11 are tightly attached to the surface of the combined filter 56.

[0040] In use, the intelligent drive component 53 controls the movable support plate 54 to move on the filter frame 51 according to the required grinding mesh, thereby driving the combined filter screen 56 to move at the bottom of the bowl 1 and the disposable inner liner 11, so that the required mesh size is attached to the bottom of the bowl 1 and the disposable inner liner 11, so that the powder that has reached the target fineness can be screened and collected in time, avoiding the problems of over-grinding or uneven fineness, and realizing precise control of grinding fineness.

[0041] It should be noted that the combined filter 56 has a segmented structure, with 20 mesh, 80 mesh, 150 mesh, 200 mesh and 300 mesh meshes evenly distributed from one end to the other.

[0042] Specifically, the intelligent drive component 53 includes a servo motor 531 fixedly installed on the outer wall of one end of the filter frame 51. The servo motor 531 is connected to the control unit 4 via signal. A lead screw 532, which is coaxially fixedly connected to the output end of the servo motor 531, is rotatably installed in the debugging cavity 52. ​​The lead screw 532 is screwed to the movable support plate 54.

[0043] In use, the servo motor 531 is controlled to rotate by the control unit 4. The servo motor 531 drives the movable support plate 54 to move within the adjustment cavity 52 to complete the horizontal movement adjustment and feeds the stroke back to the control unit 4. The control unit 4 determines the number of marks used based on the stroke data and displays the visual information directly on the display screen 41, making the operation process clear at a glance and improving the intelligence of the equipment and the user experience.

[0044] More specifically, support blocks 57 are fixedly installed at both ends of the bottom of the filter frame 51, and a positioning frame 58 with a bowl-shaped structure adapted to the outer wall of the bowl body 1 is fixedly installed on the filter frame 51 at the center position above the combined filter screen 56. The bowl body 1 is detachably inserted into the positioning frame 58.

[0045] When in use, the bowl 1 is installed on the positioning frame 58 to fix the position of the bowl 1, so that the combined filter screen 56 can be stably attached to the bowl 1, making it easy for the control unit 4 to judge the position and preventing the bowl 1 from shifting during grinding. It is stable and reliable, and the powder produced by grinding falls directly. It can be collected by placing a receiving box between the two support blocks 57, which is convenient and quick.

[0046] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A grinding device for preventing cross-contamination, comprising a bowl body (1), a cover body (2) disposed on the bowl body (1), a pestle (3) inserted into the bowl body (1), and a control unit (4) disposed on the cover body (2), characterized in that: The bowl (1) is provided with a detachable disposable inner liner (11) that is adapted to the inner wall of the bowl (1). The inner wall of the disposable inner liner (11) is a multi-layer stepped annular grinding surface (12), and the surface roughness of each layer of the annular grinding surface (12) is different. The roughness of the multi-layer stepped annular grinding surface (12) increases from top to bottom. The cover (2) is placed on top of the disposable inner liner (11), and the center of the cover (2) has a hole (21) for inserting the pestle (3).

2. The grinding device for preventing cross-contamination according to claim 1, characterized in that: The top of the disposable inner liner (11) is fixedly installed with a support ring (13) that is compatible with the top of the bowl (1). A positioning rod (14) is fixedly installed on the support ring (13). A positioning hole (15) that is compatible with the positioning rod (14) is opened on the bowl (1). The positioning rod (14) is inserted into the positioning hole (15).

3. The grinding device for preventing cross-contamination according to claim 2, characterized in that: The pestle (3) includes a grinding part (31) and a handle (32). One end of the grinding part (31) is fixedly installed with a T-shaped protrusion (33). The end of the handle (32) is provided with a groove (34) that matches the protrusion (33). The protrusion (33) is inserted into the groove (34). The end of the protrusion (33) is fixedly installed with a pressure sensor (35) that abuts against the groove (34).

4. A grinding device for preventing cross-contamination according to claim 3, characterized in that: The cover (2) is fixedly mounted with a display screen (41) that is electrically connected to the control unit (4), and the pressure sensor (35) is signal connected to the control unit (4).

5. A grinding device for preventing cross-contamination according to claim 4, characterized in that: The grinding device also includes an adjustable filter mechanism (5), which includes a filter frame (51) set at the bottom of the bowl (1). The filter frame (51) has an adjustment cavity (52). A movable support plate (54) made of the same material as the bowl (1) is slidably installed in the adjustment cavity (52) through an intelligent drive component (53). The movable support plate (54) has a leakage hole (55). A combined filter (56) is fixedly installed on the movable support plate (54). The mesh count of the combined filter (56) gradually increases from one end to the other along the long side. The bottom of the bowl (1) and the disposable inner liner (11) is designed to be open. The bottom of the bowl (1) and the disposable inner liner (11) are tightly attached to the surface of the combined filter (56).

6. A grinding device for preventing cross-contamination according to claim 5, characterized in that: The intelligent drive component (53) includes a servo motor (531) fixedly installed on the outer wall of one end of the filter frame (51). The servo motor (531) is signal-connected to the control unit (4). A lead screw (532) coaxially fixedly connected to the output end of the servo motor (531) is rotatably installed in the debugging cavity (52). The lead screw (532) is screwed to the movable support plate (54).

7. A grinding device for preventing cross-contamination according to claim 6, characterized in that: The filter frame (51) has support blocks (57) fixedly installed at both ends of the bottom. The filter frame (51) has a positioning frame (58) with a bowl-shaped structure that is adapted to the outer wall of the bowl (1) fixedly installed at the center position above the combined filter screen (56). The bowl (1) is detachably inserted into the positioning frame (58).

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