Grinding and tabletting integrated cement sampling and tabletting machine
The integrated grinding and tableting cement sampling and tableting machine solves the problems of cross-contamination and particle size discrepancies in the grinding and tableting processes of existing equipment. It achieves efficient, cross-contamination-free, and automated preparation of cement samples, ensuring the accuracy and repeatability of XRF and XRD analyses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-03-27
AI Technical Summary
Existing cement sample preparation equipment has problems such as cross-contamination risk during grinding and tableting, difficulty in meeting different particle size requirements for XRF and XRD analysis, and low analytical accuracy due to insufficient tableting pressure.
A cement sampling and tablet making machine integrating grinding and tableting was designed, including a grinding module, a tableting module, a material transfer and central control module. It adopts a robotic arm and a transport mechanism to achieve fully automated operation. The grinding chamber is designed with visualization. The tableting module adopts high-pressure tableting and combines boric acid edge wrapping technology to ensure the density of the sample tablets and the absence of cross-contamination.
It achieves improved stability and efficiency in sample preparation, ensures the accuracy and repeatability of XRF and XRD analyses, has a high surface finish on the sample, avoids contamination caused by steel ring cleaning, and ensures complete and traceable sample quality.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to the field of material sample preparation technology, and more specifically, to a cement sampling and tableting machine that integrates grinding and tableting. Background Technology
[0002] X-ray fluorescence spectroscopy (XRF) and X-ray diffraction (XRD) are core tools for quality control and scientific research in the modern cement industry, and their analytical accuracy heavily depends on the quality of sample preparation. Powder tableting is the most commonly used sample preparation method, but currently available automated equipment has significant shortcomings, mainly in the grinding and tableting stages.
[0003] In the grinding process, the existing equipment's grinding chamber is not visible, making it impossible to visually inspect and remove residual samples, posing a risk of cross-contamination, and requiring time-consuming maintenance. More importantly, XRF and XRD analyses have different requirements for powder particle size: XRF requires fine grinding (approximately 4-7 μm) to reduce matrix effects, while XRD requires a coarser particle size (approximately 30 μm) to avoid damaging the crystal structure. Existing single grinding processes cannot simultaneously meet the needs of both analyses, resulting in poor repeatability or inaccuracy of analytical results. In the tableting process, recyclable steel ring molds are commonly used. After tableting, the sample needs to be broken to recover the steel ring, which is a cumbersome process that is prone to contamination and makes sample traceability impossible. In addition, the conventional tableting pressure (approximately 100 kg / cm²) is insufficient, making it difficult to obtain smooth and dense sample pieces, resulting in severe X-ray scattering, low signal-to-noise ratio, and affecting analytical accuracy. Therefore, we have made improvements and proposed a cement sampling tableting machine that integrates grinding and tableting. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sample preparation machine that is stable, efficient, free from cross-contamination, and can simultaneously meet the particle size requirements of XRF and XRD analysis.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A cement sampling and tableting machine that integrates grinding and tableting is proposed to improve the above-mentioned problems.
[0006] The application is as follows: A cement sampling and tableting machine integrating grinding and tableting, comprising: The grinding module, the tableting module, and the material transfer and central control module that connects the two; The grinding module includes a main mill structure and a grinding preparation platform; the main mill structure is equipped with an openable and closable grinding chamber, inside which are grinding components driven by a mill motor, and a discharge pipe that can be opened and closed is provided at the bottom of the grinding chamber; The tableting module includes the main body of the tableting machine, the tableting preparation platform, the sample quantification mechanism, and the boric acid quantification mechanism. The main body of the tableting machine is equipped with a feed port and a tableting execution component driven by a hydraulic cylinder with a pressure ≥300kg / cm². The material transfer and central control module includes: The transport mechanism connects the grinding preparation platform and the tablet preparation platform, and is used to transfer containers carrying samples between them; The robotic arm assembly includes a first robotic arm disposed in the grinding module and a second robotic arm disposed in the tablet pressing module; The central control system is used to control the coordinated sequential actions of the grinding module, tableting module, material transfer, and various actuators in the central control module.
[0007] As a preferred technical solution of this application, the grinding chamber of the main structure of the mill is composed of a grinding bowl and a cover plate that is driven to open and close by a mill rotary cylinder; the grinding assembly includes a tungsten carbide grinding ring and a grinding hammer disposed in the grinding bowl, and the mill motor drives the grinding bowl and its internal components to rotate centrifugally through a centrifugal hammer; the opening and closing of the discharge pipe is controlled by a sealing cylinder driving a sealing cone. The upper end of the grinding chamber is equipped with a methanol injection port for injecting a small amount of methanol grinding aid and eliminating static electricity during grinding.
[0008] As a preferred technical solution of this application, the grinding module also includes a dust removal system, which is configured to connect to the discharge pipe to clean up residual powder after grinding is completed and the sample is discharged through the discharge pipe. The main structure of the mill is installed in the cabinet by mill springs, and the cabinet is filled with counterweight sand.
[0009] As a preferred technical solution of this application, the tableting execution component of the main body of the tablet press includes a motion mechanism driven to lift by a hydraulic cylinder, a tablet press tungsten carbide head mounted on the motion mechanism, and a cover driven to open and close by a tablet pressing rotary cylinder. The inner side of the cover is provided with a pressure cover, and the outer end of the cover is provided with a roller bearing for easy rotation. During tableting, the cap closes to seal the upper part of the feed inlet, and the hydraulic cylinder drives the tungsten carbide head of the tablet press to rise, cooperating with the cap to apply pressure to the material located in the feed inlet.
[0010] As a preferred technical solution of this application, the tableting module also includes a limit sensing component, which includes a limit screw and a corresponding limit sensor on the motion mechanism, used to detect the zero position of tableting, the unqualified position of tableting and the completed position of tableting. The lower end of the pressure cap is equipped with two sets of hydraulic stop blocks, which are used to physically limit the movement of the limit sensing components.
[0011] As a preferred technical solution of this application, the tablet press tool has a central sample chamber and an overflow chamber structure surrounding it, so that when boric acid is poured in, part of the boric acid covers the top of the sample, and part of the boric acid flows down through the overflow chamber and wraps around the sample, forming a boric acid-edged preform.
[0012] As a preferred technical solution of this application, the first robotic arm is configured to pick up the sample cup from the grinding preparation platform and pour the sample into the grinding chamber of the main structure of the mill, and to put the sample cup that received the ground sample back to the grinding preparation platform after grinding is completed. The second robotic arm is configured to perform the following operations: pick up a sample cup from the tablet preparation platform and pour the sample into the sample quantification mechanism; use the tablet press tool to receive the quantitative sample from the sample quantification mechanism and the quantitative boric acid from the boric acid quantification mechanism, and transfer the mixture to the feed port of the tablet press main body mechanism.
[0013] As a preferred technical solution of this application, the material transfer and central control module further includes a cleaning component, which includes: Head cleaning mechanism for cleaning the tungsten carbide head of a tablet press; A cap cleaning mechanism for cleaning caps; In addition, tools and cup cleaning mechanisms for cleaning tablet press tools and sample cups.
[0014] As a preferred technical solution of this application, the central control system has at least two grinding control programs pre-stored, which correspond to a fine grinding mode for preparing a first target particle size for XRF analysis and a coarse grinding mode for preparing a second target particle size for XRD analysis, wherein the first target particle size is smaller than the second target particle size.
[0015] A method for integrated grinding and tableting of a cement sampling tableting machine includes the following steps: S1: Place the powder sample to be tested into the sample cup of the grinding preparation platform; S2: The first robotic arm pours the sample into the grinding chamber of the main structure of the mill. After the chamber is closed, grinding is carried out according to the preset grinding parameters. After grinding is completed, the powder is discharged into the original sample cup, and the first robotic arm puts the sample cup back into the grinding preparation platform. S3: The sample cup containing the ground sample is transferred from the grinding preparation platform to the tablet preparation platform by the transport mechanism; S4: The sample is poured from the sample cup into the sample quantification mechanism by the second robotic arm; then, the tablet press tool is used to receive the quantified sample and the quantified boric acid from the boric acid quantification mechanism to form a mixture. S5: The mixture is transferred to the feed port of the main body of the tablet press by the second robotic arm; S6: Close the cover of the main body of the tablet press, start the hydraulic cylinder to press the mixture into shape with a pressure of ≥300kg / cm², and obtain the sample tablet for analysis; S7: Open the seal and take out the sample; Steps S2 to S7 are executed automatically and sequentially by the central control system.
[0016] As the preferred technical solution in this application In step S2, the preset grinding parameters are selected according to the type of the target analytical instrument. When preparing samples for XRF analysis, the first grinding parameter is used to make the powder particle size dv(50) 3-4μm; when preparing samples for XRD analysis, the second grinding parameter is used to make the powder particle size approximately 30μm. And / or in step S4, the tablet press tool causes boric acid to form a wrapping structure around the sample; And / or after step S2, before step S3, or simultaneously, start the dust removal system of the grinding module to clean the grinding chamber and the discharge pipe; And / or after step S7, start the cleaning system to clean the tungsten carbide head, cap, tablet press tools and sample cup of the tablet press.
[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: 1. By seamlessly connecting the grinding and tableting processes with the robotic arm and the transport mechanism, fully automated and continuous sample preparation is achieved, which greatly improves sample preparation efficiency and consistency; 2. By programming different "grinding formulas", ultrafine powders (up to dv(50)=3μm) can be prepared for XRF analysis and powders with suitable particle size (about 30μm) can be prepared for XRD analysis, ensuring the accuracy and repeatability of the two analyses; 3. High pressure of ≥300kg / cm² is used to ensure extremely high surface smoothness and density of the sample. Boric acid edge wrapping technology replaces the traditional steel ring, so the tablet pressing does not require damage, the sample is complete and traceable, and the pollution caused by cleaning the steel ring is avoided. 4. The grinding mechanism adopts a spring-loaded shock absorption and counterweight sand design, while the tablet pressing mechanism adopts a high-rigidity structure and precise limit sensing, ensuring the long-term stability of the equipment and the reliability of the sample preparation results. Attached Figure Description
[0018] Figure 1 A schematic diagram of the overall structure of a cement sampling and tableting machine that integrates grinding and tableting is provided for this application; Figure 2 An enlarged structural schematic diagram of the grinding module of a cement sampling and tableting machine that integrates grinding and tableting, provided in this application; Figure 3 A side sectional front view of the grinding module of a cement sampling and tableting machine that integrates grinding and tableting, provided for this application; Figure 4 Top view of the grinding module of a cement sampling and tableting machine that integrates grinding and tableting, provided in this application, showing its closed and open states; Figure 5 The grinding module of the cement sampling and tableting machine that integrates grinding and tableting provided in this application is shown in a front-section right view at the discharge pipe. Figure 6 An enlarged schematic diagram of the grinding bowl structure of a cement sampling and tableting machine that integrates grinding and tableting is provided in this application; Figure 7 An enlarged structural schematic diagram of a cement sampling tablet making machine that integrates grinding and tableting, provided for this application; Figure 8 A schematic side section of the overall structure of a cement sampling tablet making machine that integrates grinding and tableting, provided for this application; Figure 9 A top view of a cement sampling tablet making machine that integrates grinding and tableting, provided in this application; Figure 10 A side sectional view of the tablet press tool placement of a cement sampling tablet making machine that integrates grinding and tableting, provided in this application; Figure 11 An enlarged side section diagram of the tableting tool of a cement sampling tableting machine that integrates grinding and tableting, provided in this application; Figure 12 The present application provides a flowchart of the overall sample preparation method for a cement sampling and tableting machine that integrates grinding and tableting.
[0019] The image shows: 1. Mill motor; 2. Mill spring; 3. Methanol inlet; 4. Mill rotary cylinder; 5. Sealing cylinder; 6. Discharge pipe; 7. Sealing cone; 8. Grinding ring; 9. Grinding hammer; 10. Centrifugal hammer; 11. Mill main structure; 12. Grinding bowl; 13. Tableting rotary cylinder; 14. Cover; 15. Roller bearing; 16. Hydraulic stop block; 17. Hydraulic cylinder; 18. Tableting machine main mechanism; 19. Limit screw; 20. Limit sensor; 22. Tableting machine tungsten carbide head; 23. Feed port; 24. Cover; 25. Motion mechanism; 26. Tableting machine tools; 27. Sample cup; 28. First robotic arm; 29. Second robotic arm; 30. Transport mechanism; 31. Grinding preparation platform; 32. Tableting preparation platform. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0021] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments, features, and technical solutions in the embodiments of the present invention can be combined with each other.
[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0023] like Figures 1-12 As shown, this embodiment proposes a cement sampling and tableting machine that integrates grinding and tableting, comprising: The grinding module, the tableting module, and the material transfer and central control module that connects the two; The grinding module includes a main grinding structure 11 and a grinding preparation platform 31. The main grinding structure 11 is provided with an openable and closable grinding chamber, which contains a grinding component driven by a grinding motor 1. The bottom of the grinding chamber is provided with an openable and closable discharge pipe 6. The grinding preparation platform 31 is used to receive and temporarily store the sample cups 27 to be ground.
[0024] The grinding chamber of the main structure 11 of the mill consists of a grinding bowl 12 and a cover plate that is driven to open and close by a mill rotary cylinder 4; the grinding components include a tungsten carbide grinding ring 8 and a grinding hammer 9 located in the grinding bowl 12; the mill motor 1 drives the grinding bowl 12 and its internal components to rotate centrifugally through a centrifugal hammer 10; the opening and closing of the discharge pipe 6 is controlled by a sealing cylinder 5 driving a sealing cone 7. The upper end of the grinding chamber is provided with a methanol injection port 3, which is used for injecting a small amount of methanol grinding aid and eliminating static electricity during grinding.
[0025] The grinding module also includes a dust removal system, which is configured to connect to the discharge pipe 6 to clean up residual powder after grinding is completed and the sample is discharged through the discharge pipe 6. The main structure 11 of the mill is installed in the cabinet by the mill spring 2, and the cabinet is filled with counterweight sand.
[0026] The core of the main structure of the mill is a grinding bowl 12 made of tungsten carbide, which contains a grinding ring 8 and a grinding hammer 9. It is driven by the mill motor 1 through the centrifugal hammer 10 to perform high-speed centrifugal grinding. The grinding bowl 12 is equipped with an openable and closable cover plate controlled by a rotary cylinder to make the grinding chamber visible. During grinding, the sealing cylinder 5 drives the sealing cone 7 to seal the discharge port 23 of the grinding bowl 12; after grinding, the sealing cone 7 retracts, and the sample is discharged through the discharge pipe 6 under centrifugal force. The main structure of the mill is installed in the cabinet through the mill spring 2, and the cabinet is filled with counterweight sand to ensure stable operation.
[0027] The tableting module includes a tableting machine main body 18, a tableting preparation platform 32, a sample quantitative mechanism and a boric acid quantitative mechanism. The tableting machine main body 18 is equipped with a feed port 23 and a tableting execution component driven by a hydraulic cylinder 17 with a pressure ≥300kg / cm². The tablet pressing execution component of the main body mechanism 18 of the tablet press includes a motion mechanism 25 driven to lift by a hydraulic cylinder 17, a tablet press tungsten carbide head 22 mounted on the motion mechanism 25, and a cover 14 driven to open and close by a tablet pressing rotary cylinder 13. The cover 14 has a pressure cover 24 on its inner side and a roller bearing 15 for easy rotation on its outer end. During tableting, the cap 14 closes, causing the pressure cap 24 to seal the upper part of the feed port 23. The hydraulic cylinder 17 drives the tungsten carbide head 22 of the tablet press to rise, cooperating with the pressure cap 24 to apply pressure to the material located in the feed port 23.
[0028] The tablet compression module also includes a limit sensing component, which includes a limit screw 19 on the motion mechanism 25 and a corresponding limit sensor 20, used to detect the zero position of tablet compression, the unqualified position of tablet compression, and the completed position of tablet compression. The lower end of the pressure cap 24 is provided with two sets of hydraulic stop blocks 16, which are used to physically limit the movement of the limit sensing components.
[0029] The tablet press tool 26 has a central sample chamber and an overflow chamber structure surrounding it, so that when boric acid is poured in, part of the boric acid covers the top of the sample, and part of the boric acid flows down through the overflow chamber and wraps around the sample, forming a boric acid-edged preform.
[0030] The main body of the tablet press 18 is provided with a feed inlet 23 and an internal motion mechanism 25 driven by a hydraulic cylinder 17, on which a tungsten carbide head 22 of the tablet press is mounted. Correspondingly, a cover 14 driven by a tablet pressing rotary cylinder 13 and guided by a roller bearing 15 is provided, and a pressure cover 24 is provided on the inner side of the cover 14.
[0031] During tablet compression, the cap 14 rotates to close, and the hydraulic cylinder 17 drives the motion mechanism 25 to rise, so that the sample is subjected to a high pressure of ≥300kg / cm² between the tungsten carbide head and the cap 24 to form the tablet.
[0032] The sample metering mechanism and the boric acid metering mechanism are used to accurately measure quantitative amounts of sample powder and boric acid powder, respectively. The boric acid metering mechanism is connected to the boric acid storage tank.
[0033] The tablet preparation platform 32 is used to receive and temporarily store the ground sample cups 27 from the grinding module.
[0034] The material transfer and central control module includes: The transport mechanism 30 connects the grinding preparation platform 31 and the tablet preparation platform 32, and is used to transfer the container carrying the sample between them; wherein, the transport mechanism 30 is usually a linear module or conveyor belt, and is used to transfer the sample cup 27 and the pressed sample between the grinding preparation platform 31, the tablet preparation platform 32 and the injection port of the subsequent analytical instrument (XRF / XRD).
[0035] The robotic arm assembly includes a first robotic arm 28 disposed in the grinding module and a second robotic arm 29 disposed in the tablet pressing module; The first robotic arm 28 is configured to pick up the sample cup 27 from the grinding preparation platform 31 and pour the sample into the grinding chamber of the main structure 11 of the mill, and to put the sample cup 27 that received the ground sample back into the grinding preparation platform 31 after grinding is completed. The second robotic arm 29 is configured to perform the following operations: pick up the sample cup 27 from the tablet preparation platform 32 and pour the sample into the sample quantification mechanism; use the tablet press tool 26 to receive the quantitative sample from the sample quantification mechanism and the quantitative boric acid from the boric acid quantification mechanism, and transfer the mixture to the feed port 23 of the tablet press main body mechanism 18 for filling.
[0036] The central control system is used to control the coordinated sequential actions of the grinding module, tableting module, material transfer, and various actuators in the central control module.
[0037] The material transfer and central control module also includes cleaning components, which include: a head cleaning mechanism for cleaning the tungsten carbide head 22 of the tablet press, a cap 24 cleaning mechanism for cleaning the cap 24, and a tool and cup cleaning mechanism for cleaning the tablet press tool 26 and sample cup 27.
[0038] The central control system has at least two grinding control programs pre-stored, which correspond to the fine grinding mode for preparing the first target particle size for XRF analysis and the coarse grinding mode for preparing the second target particle size for XRD analysis, respectively, wherein the first target particle size is smaller than the second target particle size; The entire system's operation sequence, robotic arm movements, grinding time and parameters (which can be configured with different "grinding recipes" to meet the particle size requirements of XRF or XRD), tableting pressure, and the start and stop of each cylinder and motor are controlled by programming.
[0039] The connection between the grinding module and the tableting module in the device is as follows: the grinding module and the tableting module are spatially connected through the transport mechanism 30 to form a sample flow path; the first robotic arm 28 completes the closed-loop operation of "sampling-feeding-receiving" inside the grinding module; after grinding, the transport mechanism 30 transports the sample cup 27 from the grinding preparation platform 31 to the tableting preparation platform 32; then, the second robotic arm 29 completes the operation of "sampling-quantification-filling" inside the tableting module, and after removing the tableting tool, triggers the main mechanism 18 of the tableting machine to execute the tableting process; finally, the pressed sample tablet is taken out by the second robotic arm 29, placed back into the transport mechanism 30, and transported to the analysis terminal; the whole process is integrated and scheduled by the central control system, realizing unmanned and fully automated preparation from raw powder to analytical sample tablets.
[0040] A method for integrated grinding and tableting of a cement sampling tableting machine includes the following steps: S1: Place the powder sample to be tested into the sample cup 27 of the grinding preparation platform 31; S2: The first robotic arm 28 picks up the sample cup 27 and pours the powder into the grinding bowl 12 of the mill main body structure 11 with the cover plate already opened; the rotary cylinder closes the cover plate and seals it; the mill motor 1 starts and grinds according to the preset "grinding formula" (time, speed), while methanol grinding aid can be injected to assist grinding; after grinding is completed, the sealing cone 7 opens, and the sample is discharged into the original sample cup 27 below through the discharge pipe 6; the first robotic arm 28 puts the cup containing the ground sample back into the grinding preparation platform 31; The preset grinding parameters are selected according to the type of target analytical instrument. When preparing samples for XRF analysis, the first grinding parameter is used to make the powder particle size dv(50) 3-4μm; when preparing samples for XRD analysis, the second grinding parameter is used to make the powder particle size approximately 30μm. S3: The transport mechanism 30 transports the sample cup 27 from the grinding preparation platform 31 to the tablet preparation platform 32; at the same time, the grinding machine motor 1 starts again, and the dust removal system connects to the discharge pipe 6 to clean up the residual powder. S4: The second robotic arm 29 picks up the sample cup 27 from the tablet preparation platform 32, pours the powder into the sample metering mechanism, and accurately collects 6cc of sample; the second robotic arm 29 uses the tablet press tool 26 to first receive the 6cc sample, and then collects 15cc of boric acid from the boric acid metering mechanism and pours it into the same tool; the tablet press tool 26 is designed with a special overflow port 23, which allows the boric acid to wrap around the sample to form a "boric acid edge" preform; S5: The second robotic arm 29 moves the tablet press tool 26 containing the sample and boric acid preform to above the feed port 23 of the main body mechanism 18 of the tablet press. After pouring the material into the feed port 23, the tablet press tool 26 is removed. The tablet pressing rotary cylinder 13 drives the sealing cap 14 to rotate and close. The hydraulic cylinder 17 drives the motion mechanism 25 to rise and press the tablet with a pressure of ≥300kg / cm². S6: After tableting is completed, the cap 14 is opened, the hydraulic cylinder 17 continues to lift, and the pressed sample tablet is pushed out of the discharge port 23. The second robot arm 29 picks up the sample tablet and places it on the transport mechanism 30 to send it to the XRF or XRD analyzer. At the same time, each cleaning mechanism automatically cleans the tablet press head, cap 24, tools and cup. S7: All the above steps are sequentially controlled by the central control system, and the grinding parameters can be set to "XRF fine grinding mode" or "XRD coarse grinding mode" as needed.
[0041] When this application is used: The grinding module is located on the left, and the tableting module is located on the right, connected by a linear guide transport mechanism 30. The grinding preparation platform 31 and the tableting preparation platform 32 are located at the front of the grinding module and the tableting module, respectively, for easy handling by the robotic arm.
[0042] The grinding process begins: the operator places the sample cup 27 containing raw cement powder on the grinding preparation platform 31. The central control system is activated, and the transport mechanism 30 moves the grinding preparation platform 31 to the grinding station. The first robotic arm 28 (which can be a multi-jointed or gantry-type robotic arm) moves, grips the sample cup 27, and moves it above the main structure 11 of the mill. At this time, the rotary cylinder has lifted and rotated the cover plate, fully exposing the grinding bowl 12; the first robotic arm 28 pours the powder into the grinding bowl 12. After pouring, the bowl cleaner (integrated on the first robotic arm 28, using a circular cleaning brush driven by a rotating motor through visual positioning in the prior art) sweeps the powder spilled above the grinding ring 8 into the bowl; subsequently, the first robotic arm 28 returns the empty cup to its original position on the grinding preparation platform 31.
[0043] The mill's rotary cylinder 4 reverses its rotation, driving the cover plate to rotate counterclockwise and descend, sealing the grinding bowl 12. The sealing cylinder 5 pushes the sealing cone 7 to close the discharge pipe 6. The mill motor 1 starts, driving the grinding ring 8 and grinding hammer 9 inside the grinding bowl 12 to rotate at high speed via the centrifugal hammer 10, centrifugally grinding the sample. Simultaneously, a trace amount of methanol can be injected through the methanol injection port 3. The grinding parameters (time, speed) are set by the central control system according to the selected "XRF mode" or "XRD mode". After grinding, the mill motor 1 stops, the sealing cylinder 5 pulls back the sealing cone 7, and the mill motor 1 restarts briefly, using centrifugal force to throw all the ground powder out through the discharge pipe 6, falling into the sample cup 27 already in place below. The first robotic arm 28 then picks up this cup containing the ground sample and places it back into the grinding preparation area.
[0044] The transport mechanism 30 operates to transport the sample cup 27 on the grinding preparation platform 31 to the tablet preparation platform 32.
[0045] The tableting process then begins: The second robotic arm 29 (designed with two sets of independently moving grippers that can hold the sample cup 27 and the tableting tool 26 respectively) uses one gripper to pick up the sample cup 27 from the tableting preparation platform 32, pouring the powder from the sample cup 27 into the sample metering mechanism, continuously and accurately measuring 6cc of sample. Then, the gripper lowers the sample cup 27 (which can be returned to the tableting preparation platform 32 or placed in a temporary storage position), and the other gripper picks up the dedicated tableting tool 26 (the tableting tool 26 has a central cylindrical cavity and an outer overflow cavity) and places it into the feed port 23 in the main body of the tableting machine 18, first aligning its central cavity with the discharge port 23 of the sample metering mechanism to collect 6cc of sample. Subsequently, the sample is moved to the bottom of the boric acid metering mechanism and 15cc of boric acid is collected. When the boric acid is poured into the tablet press tool 26, 5cc first covers the upper part of the sample, and the remaining 10cc flows into the outer cavity through the overflow port 23, thereby forming a boric acid surrounding ring around the sample column, namely the "boric acid edging" preform.
[0046] Next, the second gripper in the second robotic arm 29 lifts the tablet press tool 26 upwards and removes it from the feed port 23.
[0047] High-pressure tableting and sample ejection: The tableting rotary cylinder 13 actuates, guided by the roller bearing 15, driving the cap 14 to rotate clockwise to the closed position, with the cap 24 precisely sealing the upper part of the feed port 23. The hydraulic cylinder 17 is activated, lifting the motion mechanism 25 and the tungsten carbide head 22 of the tableting machine mounted on it. The sample and boric acid are forcefully compressed between the tungsten carbide head and the cap 24, with the pressure maintained at ≥300 kg / cm² by the hydraulic system. The limit sensor 20 and the limit screw 19 cooperate to precisely control the tableting stroke. After tableting is completed, the hydraulic cylinder 17 slightly retracts, and the tableting rotary cylinder 13 drives the cap 14 to open counterclockwise. Subsequently, the hydraulic cylinder 17 rises again, pushing the solidified tablet out of the feed port 23.
[0048] The second robotic arm 29 picks up the shaped sample and places it on the transport mechanism 30. The transport mechanism 30 directly delivers the sample to the sample chamber inlet of the XRF or XRD analyzer it docks with, completing the fully automated sample injection.
[0049] Throughout the process, the cleaning system operates synchronously. After tableting, the head cleaning mechanism and the capping 24 cleaning mechanism respectively blow or wipe the tungsten carbide head 22 and capping 24 of the tablet press. The tool and cup cleaning mechanism cleans the used tablet press tools 26 and sample cups 27. In the grinding module, after each grinding and discharge, the dust removal system automatically rises to connect to the discharge pipe 6, sucking away residual dust and keeping the pipeline clean.
[0050] The entire device is programmed and scheduled by the central control system, with each step linked together, achieving high-quality, unmanned preparation from powder to analytical sample. It is particularly suitable for the cement industry's needs for high-throughput and high-consistency preparation of XRF and XRD analytical samples.
[0051] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.
Claims
1. A cement sampling and tableting machine integrating grinding and tableting, characterized in that, include: The grinding module, the tableting module, and the material transfer and central control module that connects the two; The grinding module includes a main grinding structure (11) and a grinding preparation platform (31); the main grinding structure (11) is provided with an openable and closable grinding chamber, which is equipped with a grinding component driven by a grinding motor (1) and an openable and closable discharge pipe (6) at the bottom of the grinding chamber. The tableting module includes a tablet press main body (18), a tablet preparation platform (32), a sample quantification mechanism and a boric acid quantification mechanism. The tablet press main body (18) is provided with a feed inlet (23) and a tableting execution component driven by a hydraulic cylinder (17) with a pressure ≥300kg / cm². The material transfer and central control module includes: The transport mechanism (30) connects the grinding preparation platform (31) and the tablet preparation platform (32) for transferring the container carrying the sample between them; The robotic arm assembly includes a first robotic arm (28) disposed in the grinding module and a second robotic arm (29) disposed in the tablet pressing module. The central control system is used to control the coordinated sequential operation of the grinding module, tableting module, material transfer and various execution components in the central control module.
2. The cement sampling and tableting machine integrating grinding and tableting as described in claim 1, characterized in that, The grinding chamber of the main structure (11) of the mill consists of a grinding bowl (12) and a cover plate that is driven to open and close by a mill rotary cylinder (4); the grinding assembly includes a tungsten carbide grinding ring (8) and a grinding hammer (9) disposed in the grinding bowl (12); the mill motor (1) drives the grinding bowl (12) and its internal components to rotate centrifugally through a centrifugal hammer (10); the opening and closing of the discharge pipe (6) is controlled by a sealing cylinder (5) driving a sealing cone (7); The upper end of the grinding chamber is provided with a methanol injection port (3) for injecting a small amount of methanol grinding aid and eliminating static electricity during grinding.
3. The cement sampling and tableting machine integrating grinding and tableting according to claim 2, characterized in that, The grinding module also includes a dust removal system, which is configured to connect to the discharge pipe (6) to clean up residual powder after grinding is completed and the sample is discharged through the discharge pipe (6); The main structure (11) of the mill is installed in the cabinet by the mill spring (2), and the cabinet is filled with counterweight sand.
4. The cement sampling and tableting machine integrating grinding and tableting according to claim 1, characterized in that, The tableting execution component of the main body mechanism (18) of the tablet press includes a motion mechanism (25) driven to lift by the hydraulic cylinder (17), a tablet press tungsten carbide head (22) mounted on the motion mechanism (25), and a cover (14) driven to open and close by a tablet pressing rotary cylinder (13). The cover (14) has a pressure cover (24) on its inner side and a roller bearing (15) for easy rotation at its outer end. During tableting, the cap (14) closes to seal the upper part of the feed inlet (23) with the pressure cap (24), and the hydraulic cylinder (17) drives the tungsten carbide head (22) of the tablet press to rise, cooperating with the pressure cap (24) to apply pressure to the material located in the feed inlet (23).
5. A cement sampling and tableting machine integrating grinding and tableting as described in claim 4, characterized in that, The tablet compression module also includes a limit sensing component, which includes a limit screw (19) provided on the motion mechanism (25) and a corresponding limit sensor (20) for detecting the zero position of tablet compression, the unqualified position of tablet compression, and the completed position of tablet compression. The lower end of the pressure cap (24) is provided with two sets of hydraulic stop blocks (16) for physical limiting corresponding to the limit sensing component.
6. A cement sampling and tableting machine integrating grinding and tableting as described in claim 5, characterized in that, The tablet press tool (26) has a central sample chamber and an overflow chamber structure surrounding it, so that when boric acid is poured in, part of the boric acid covers the top of the sample, and part of the boric acid flows down through the overflow chamber and wraps around the sample, forming a boric acid-edged preform.
7. A cement sampling and tableting machine integrating grinding and tableting as described in claim 6, characterized in that, The first robotic arm (28) is configured to pick up the sample cup (27) from the grinding preparation platform (31) and pour the sample into the grinding chamber of the main structure (11) of the mill, and to put the sample cup (27) that received the ground sample back into the grinding preparation platform (31) after grinding is completed. The second robotic arm (29) is configured to perform the following operations: pick up a sample cup (27) from the tablet preparation platform (32) and pour the sample into the sample quantification mechanism; use the tablet press tool (26) to receive the quantitative sample from the sample quantification mechanism and the quantitative boric acid from the boric acid quantification mechanism, and transfer the mixture to the feed port (23) of the tablet press body mechanism (18).
8. A cement sampling and tableting machine integrating grinding and tableting as described in claim 7, characterized in that, The material transfer and central control module also includes a cleaning component, which includes: A head cleaning mechanism for cleaning the tungsten carbide head (22) of the tablet press; A gland (24) cleaning mechanism for cleaning the gland (24); In addition, a tool and cup cleaning mechanism for cleaning the tablet press tool (26) and sample cup (27).
9. A cement sampling and tableting machine integrating grinding and tableting as described in claim 1, characterized in that, The central control system has at least two grinding control programs pre-stored, corresponding to a fine grinding mode for preparing a first target particle size for XRF analysis and a coarse grinding mode for preparing a second target particle size for XRD analysis, wherein the first target particle size is smaller than the second target particle size.
10. A method for integrated grinding and tableting sample preparation using a cement sampling and tableting machine according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Place the powder sample to be tested into the sample cup (27) of the grinding preparation platform (31); S2: The sample is poured into the grinding chamber of the main structure (11) of the mill by the first robotic arm (28), and after the chamber is closed, grinding is carried out according to the preset grinding parameters; after grinding is completed, the powder is discharged into the original sample cup (27), and the first robotic arm (28) puts the sample cup (27) back into the grinding preparation platform (31). S3: The sample cup (27) carrying the ground sample is transferred from the grinding preparation platform (31) to the tablet preparation platform (32) by the transport mechanism (30). S4: The sample is poured from the sample cup (27) into the sample metering mechanism by the second robotic arm (29); then, the metered sample and the metered boric acid from the boric acid metering mechanism are received by the tablet press tool (26) to form a mixture. S5: The mixture is transferred to the feed port (23) of the main body mechanism (18) of the tablet press by the second robotic arm (29); S6: Close the cover (14) of the main body mechanism (18) of the tablet press, start the hydraulic cylinder (17) to press the mixture into shape with a pressure of ≥300kg / cm², and obtain the sample tablet for analysis; S7: Open the cap (14) and take out the sample; Steps S2 to S7 are executed automatically and sequentially by the central control system.
11. The integrated grinding and tableting sample preparation method of a cement sampling tableting machine according to claim 10, characterized in that, In step S2, the preset grinding parameters are selected according to the type of the target analytical instrument. When preparing samples for XRF analysis, the first grinding parameter is used to make the powder particle size dv(50) 3-4μm; when preparing samples for XRD analysis, the second grinding parameter is used to make the powder particle size approximately 30μm. And / or in step S4, the tablet press tool (26) causes boric acid to form a wrapping structure around the sample; And / or after step S2, before step S3, or simultaneously, start the dust removal system of the grinding module to clean the grinding chamber and the discharge pipe (6); And / or after step S7, start the cleaning system to clean the tungsten carbide head (22), the cap (24), the tablet press tool (26) and the sample cup (27) of the tablet press.