An automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device

Abstract

The application relates to the technical field of rare earth molten salt detection equipment, in particular to an automatic sampling and sample preparation structure for a lithium fluoride content detection device for rare earth molten salt electrolyte, which comprises a sample conveying pipe, a cooling mechanism and a grinding mechanism, the sample conveying pipe is rotationally connected to the top of the cooling mechanism, a universal joint is sleeved at the top end of the sample conveying pipe, and the top of the universal joint is connected with an external sampling gun. The high-temperature sample is cooled and solidified through the cooling chamber and the refrigerator, the high-temperature sample is prevented from damaging the grinding mechanism, the sample oxidation is effectively prevented, three sample storage cavities are arranged, continuous cooling and temporary storage of three samples are realized, the accuracy of the detection result is improved, the flow blocking mechanism composed of a blocking block and a return spring closes the material feeding hole in a normal state, the uncooled sample is prevented from accidentally falling, the channel is opened only when the material pushing rod is pressed, the accurate sample feeding of a single sample is realized, the cross contamination of the sample is avoided, and the accuracy of the detection result is further ensured.

Description

Technical Field

[0001] This application relates to the technical field of rare earth molten salt detection equipment, and in particular to an automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device. Background Technology

[0002] In the process of producing rare earth metals such as praseodymium-neodymium, lanthanum-cerium, and cerium metals by rare earth molten salt electrolysis, the electrolyte is mainly composed of rare earth fluorides such as praseodymium-neodymium fluoride, lanthanum-cerium fluoride, and lithium fluoride. The mass ratio of rare earth fluoride to lithium fluoride directly determines key process parameters such as the melting point, conductivity, viscosity, and rare earth oxide solubility of the electrolyte. Maintaining the stability of this ratio is crucial for ensuring current efficiency, reducing energy consumption, reducing slag volume, and stabilizing the quality of metal products.

[0003] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Existing sample preparation equipment has poor sealing during the sampling process, which easily leads to leakage and cross-contamination. Furthermore, the current industry practice for lithium fluoride testing of rare earth molten salt electrolytes mostly employs manual sampling, natural cooling, manual crushing, and sieving. Different batches of samples are prone to cross-contamination, further affecting the test results. At the same time, most sample preparation equipment on the market has a low degree of automation, completing only one process at a time, and then requiring a large amount of manual assistance for transfer, feeding, and discharging, making it difficult to adapt to the requirements of modern automated rare earth smelting production lines. Summary of the Invention

[0004] To address the problems mentioned in the background art, this application provides an automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device.

[0005] This application provides an automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device, employing the following technical solution: It includes a sample delivery pipe, a cooling mechanism, and a grinding mechanism. The sample delivery pipe is rotatably connected to the top of the cooling mechanism, and a universal connector is sleeved on the top of the sample delivery pipe. The top of the universal connector is connected to an external sampling gun. A flow-blocking mechanism is provided between the cooling mechanism and the grinding mechanism. The cooling mechanism includes a storage container with three sample storage chambers arrayed inside. A cooling chamber is sleeved on the outer surface of the storage container above the flow-blocking mechanism. A push rod that engages with the sample storage chamber is provided on the top of the cooling chamber. The flow-blocking mechanism includes a fixed platform with material passage holes arrayed inside, engaging with the sample storage chambers. A material blocking block is inserted inside the material passage holes. The grinding mechanism includes a grinding chamber with a pulverizing disc rotatably connected inside the grinding chamber below the material passage holes. A rotating shaft is fixedly connected to the center of the pulverizing disc. A grinding block is fixedly connected to the inner wall of the grinding chamber below the pulverizing disc. The grinding block is conical. Three grinding rods are arrayed near the outer wall of the grinding block outside the rotating shaft. The storage container is cylindrical. The top wall of the platform is equipped with a snap-fit ​​ring that engages with the storage container. A cooler is fixedly connected to the outer right wall of the cooling chamber, and the cooler is located in the sample storage chamber near the bottom of the sample delivery tube. A slide rail that engages with a material blocking block is opened inside the fixed platform. A push rod is fixedly connected to the top of the end of the material blocking block away from the fixed platform. A return spring is fixedly connected between the side wall of the material blocking block and the fixed platform. A retraction hole that engages with the return spring is opened inside the fixed platform. A discharge port is opened at the bottom of the grinding chamber, and a weighing component is installed at the bottom of the discharge port. The weighing component consists of a weighing sensor and a control module. The grinding chamber is composed of blocks. A guide plate is fixedly connected to the inside of the grinding chamber near the weighing component. The guide plate is set at an inclined angle towards the weighing component. An opening and closing door is slidably connected to the outer wall of the grinding chamber at the discharge port. An electric telescopic rod is set between the outer wall of the grinding chamber and the opening and closing door. The bottom of the grinding chamber is set on the external sample transfer mechanism. The top wall of the cooling chamber is rotatably connected to the top of the storage container. A toothed ring is embedded in the bottom outer wall of the cooling chamber. A servo motor B is fixedly connected to the front end of the fixed platform near the toothed ring. The top of the output shaft of the servo motor B meshes with the toothed ring through a drive wheel.

[0006] Optionally, the grinding chamber consists of three cylindrical chambers, with a number of grinding blades arranged in an array inside the grinding disc, the top of the rotating shaft being rotatably connected to the inner wall of the grinding chamber, and the bottom of the rotating shaft penetrating the center of the grinding block.

[0007] Optionally, there is a gap between the bottom of the grinding block and the inner wall of the grinding chamber. The outer wall of the bottom of the grinding block is fixedly connected to the inner wall of the grinding chamber by a conical fixing block. A transmission wheel is fixedly connected to the bottom of the rotating shaft below the grinding block. An internal gear ring meshes between the transmission wheels inside the bottom of the grinding chamber. A rotating groove is opened inside the grinding chamber to form a rotating connection with the side wall of the internal gear ring. A drive motor is embedded in the front end of the grinding chamber near the internal gear ring. The top of the output shaft of the drive motor meshes with the internal gear ring through a gear.

[0008] Optionally, a support frame is fixedly connected to the top wall of the cooling chamber on the outer surface of the push rod, an extension frame is provided at the top of the push rod, a servo motor A is fixedly connected to the rear side of the outer wall of the cooling chamber, a lead screw is rotatably connected to the outer wall of the cooling chamber near the servo motor A, the bottom end of the lead screw is meshed with the top end of the servo motor A through a gear, the top end of the lead screw is rotatably connected to the extension frame at the top of the push rod, and a guide rod is provided on the top wall of the cooling chamber, the guide rod passing through the extension frame at the top of the push rod.

[0009] Optionally, the outer wall of the cooling chamber is fixedly connected to an electric hydraulic rod via a connecting frame. An adjusting frame is fixedly connected to the bottom of the moving end of the electric hydraulic rod. The adjusting frame is L-shaped, and the side wall of the adjusting frame and the connecting frame form a sliding connection. One end of the adjusting frame engages with the outer wall of the cooling chamber.

[0010] Optionally, the electrical components used in the cooling mechanism and the grinding mechanism are equipped with control modules, which are connected to an external control system.

[0011] In summary, this application includes the following beneficial technical effects: This invention uses a cooling chamber in conjunction with a refrigerator to cool and solidify high-temperature samples, preventing damage to the grinding mechanism and effectively preventing sample oxidation. By setting up three sample storage chambers, three samples can be continuously cooled and temporarily stored, improving the accuracy of test results. At the same time, a flow-blocking mechanism composed of a material blocking block and a return spring closes the material passage under normal conditions to prevent uncooled samples from accidentally falling. The passage is only opened when the push rod is pressed down, enabling precise delivery of a single sample and avoiding cross-contamination, further ensuring the accuracy of test results.

[0012] This invention combines the initial crushing of the pulverizing disc with the secondary grinding of the grinding rod and grinding blocks to form a multi-stage grinding system of "coarse crushing + fine grinding". This system can quickly refine blocky samples into the powder required for testing. The conical grinding blocks guide the sample, improving the uniformity of grinding while avoiding sample residue. At the same time, a weighing component is set at the discharge port to weigh the ground sample online, ensuring that the weight information of each sample is collected in a timely manner. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a schematic diagram of the weighing component in an embodiment of this application; Figure 3 This is a schematic diagram of the storage device in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the material blocking block in an embodiment of this application; Figure 5 This is a schematic diagram of the grinding chamber structure in an embodiment of this application; Figure 6 This is a schematic diagram of the push rod structure in an embodiment of this application; Figure 7 This is a schematic diagram of the material passage structure in an embodiment of this application; Figure 8 This is a schematic diagram of the internal gear ring in an embodiment of this application; Figure 9 This is a schematic diagram of the shredder in an embodiment of this application.

[0014] Reference numerals: 1. Sample delivery tube; 2. Universal connector; 3. Storage container; 4. Sample storage chamber; 5. Cooling chamber; 6. Push rod; 7. Fixed platform; 8. Material passage hole; 9. Material blocking block; 10. Grinding chamber; 11. Crushing disc; 12. Rotating shaft; 13. Grinding block; 14. Grinding rod; 15. Snap-fit ​​ring; 16. Cooler; 17. Crushing blade; 18. Conical fixing block; 19. Transmission wheel; 20. Internal gear ring; 21. Drive motor; 22. Support frame; 23. Servo motor A; 24. Lead screw; 25. Slide rail; 26. Push rod; 27. Return spring; 28. Connecting frame; 29. ​​Electro-hydraulic rod; 30. Adjusting frame; 31. Weighing assembly; 32. Guide plate; 33. Opening and closing door; 34. Electric telescopic rod; 35. Gear ring; 36. Servo motor B; 37. Drive wheel. Detailed Implementation

[0015] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0016] This application discloses an automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device. For example... Figures 1-9As shown, the device includes a sample delivery tube 1, a cooling mechanism, and a grinding mechanism. The sample delivery tube 1 is rotatably connected to the top of the cooling mechanism. A universal connector 2 is sleeved on the top of the sample delivery tube 1. The top of the universal connector 2 is connected to an external sampling gun. The universal connector 2 has an adaptive angle adjustment capability, which can compensate for the positional deviation and angle error caused by the installation of the external sampling gun, ensuring that the high-temperature sample can be smoothly and stably introduced into the sample delivery tube 1, thereby improving the sampling stability. A flow-blocking mechanism is set between the cooling mechanism and the grinding mechanism. The flow-blocking mechanism enables the controlled release of the sample, preventing the sample from falling prematurely and cross-contamination between different batches of samples.

[0017] The cooling mechanism includes a storage container 3, which has three sample storage chambers 4 arranged in an array inside. The multiple chambers enable the sequential storage, cooling, and intermittent feeding of multiple sets of samples, effectively improving the accuracy of the test results. A cooling chamber 5 is fitted onto the outer surface of the storage container 3 above the flow-blocking mechanism. The cooling chamber 5 is a closed sandwich cavity structure. A push rod 6 that engages with the sample storage chambers 4 is provided on the top of the cooling chamber 5. The flow-blocking mechanism includes a fixed platform 7, which has an array of material passage holes 8 that engage with the sample storage chambers 4 inside. A material blocking block is inserted into the material passage hole 8. 9. The grinding mechanism includes a grinding chamber 10. Inside the grinding chamber 10, a crushing disc 11 is rotatably connected below the feed hole 8. A rotating shaft 12 is fixedly connected to the center of the crushing disc 11. A grinding block 13 is fixedly connected to the inner wall of the grinding chamber 10 below the crushing disc 11. The grinding block 13 is conical. Three grinding rods 14 are arranged in an array near the outer wall of the grinding block 13 on the outside of the rotating shaft 12. The grinding rods 14 rotate synchronously with the rotating shaft 12 and work with the inner wall of the grinding block 13 to finely grind the sample after primary crushing, so that the sample is ground into uniform fine powder.

[0018] The storage container 3 is cylindrical in shape. The top wall of the fixed platform 7 is provided with a snap ring 15 that engages with the storage container 3. The snap ring 15 is used to limit and fix the bottom of the storage container 3 to prevent the cooling chamber 5 from rotating and causing the storage container 3 to rotate. A cooler 16 is fixedly connected to the outer right wall of the cooling chamber 5. The cooler 16 is located in the sample storage chamber 4 near the bottom of the sample delivery tube 1. This arrangement allows for rapid cooling and solidification of the sample flowing into the sample storage chamber 4, preventing high-temperature molten salt from directly entering the grinding mechanism and causing equipment damage. It also prevents the high-temperature sample from evaporating components or oxidizing and deteriorating.

[0019] The grinding chamber 10 consists of three cylindrical chambers. Several crushing blades 17 are arranged in an array inside the crushing disc 11. The top of the rotating shaft 12 is rotatably connected to the inner wall of the grinding chamber 10. The bottom of the rotating shaft 12 passes through the center of the grinding block 13. After the sample falls onto the surface of the crushing disc 11, the high-speed rotating crushing blades 17 first crush the blocky molten salt sample, cutting the large solid sample into small particles, thus completing the primary crushing operation.

[0020] There is a gap between the bottom of the grinding block 13 and the inner wall of the grinding chamber 10. The outer wall of the bottom of the grinding block 13 is fixedly connected to the inner wall of the grinding chamber 10 by a conical fixing block 18. The conical fixing block 18 supports and fixes the grinding block 13 to prevent the structure from loosening due to long-term grinding vibration. The bottom end of the rotating shaft 12 is fixedly connected to a transmission wheel 19 below the grinding block 13. An internal gear ring 20 meshes between the transmission wheels 19 inside the bottom end of the grinding chamber 10. A rotating groove is opened inside the grinding chamber 10 to form a rotating connection with the side wall of the internal gear ring 20. A drive motor 21 is embedded in the front end of the grinding chamber 10 near the internal gear ring 20. The top of the output shaft of the drive motor 21 meshes with the internal gear ring 20 through a gear.

[0021] A support frame 22 is fixedly connected to the top wall of the cooling chamber 5 on the outer surface of the push rod 6. An extension frame is provided at the top of the push rod 6. A servo motor A23 is fixedly connected to the rear side of the outer wall of the cooling chamber 5. A lead screw 24 is rotatably connected to the outer wall of the cooling chamber 5 near the servo motor A23. The bottom end of the lead screw 24 is meshed with the top end of the servo motor A23 through a gear. The top end of the lead screw 24 is rotatably connected to the extension frame at the top of the push rod 6. A guide rod is provided on the top wall of the cooling chamber 5. The guide rod passes through the extension frame at the top of the push rod 6. The support frame 22 plays a vertical limiting and guiding role for the push rod 6, ensuring that the push rod 6 rises and falls vertically and avoids deviation and jamming. The servo motor A23 drives the lead screw 24 to rotate through gear transmission. The push rod 6 moves vertically reciprocatingly as the lead screw 24 rotates. When the push rod 6 is pressed down, it pushes the cooled and solidified sample in the sample storage chamber 4 downward, realizing automatic material discharge.

[0022] The fixed platform 7 has a slide 25 inside that engages with the material blocking block 9. The top of the end of the material blocking block 9 away from the fixed platform 7 is fixedly connected to a push rod 26. A return spring 27 is fixedly connected between the side wall of the material blocking block 9 and the fixed platform 7. The fixed platform 7 has a retraction hole inside that engages with the return spring 27. In the non-working state, the return spring 27 drives the material blocking block 9 to insert into the slide 25 under the action of the rebound force, completely blocking the material passage 8 and preventing the sample from falling out accidentally.

[0023] An electric hydraulic rod 29 is fixedly connected to the outer wall of the cooling chamber 5 via a connecting frame 28. An adjusting frame 30 is fixedly connected to the bottom of the moving end of the electric hydraulic rod 29. The adjusting frame 30 is L-shaped. The side wall of the adjusting frame 30 and the connecting frame 28 form a sliding connection. One end of the adjusting frame 30 engages with the outer wall of the cooling chamber 5. The electric hydraulic rod 29 drives the adjusting frame 30 to move laterally. The adjusting frame 30 drives the material blocking block 9 away from the material passage hole 8 via the push rod 26. At this time, the material passage hole 8 is opened.

[0024] The grinding chamber 10 has a discharge port at its bottom, and a weighing component 31 is installed at the bottom of the discharge port. The weighing component 31 consists of a weighing sensor and a control module, which performs real-time weight detection on the ground powder sample and accurately records the weight of each sample, further improving the accuracy of the detection data. A guide plate 32 is fixedly connected inside the grinding chamber 10 near the weighing component 31. The guide plate 32 is set at an inclined angle towards the weighing component 31. The inclined structure facilitates the smooth sliding of powder and avoids powder accumulation, ensuring that all samples fall onto the surface of the weighing component 31. An opening and closing door 33 is slidably connected to the outer wall of the grinding chamber 10 at the discharge port. An electric telescopic rod 34 is installed between the outer wall of the grinding chamber 10 and the opening and closing door 33. During the grinding process, the opening and closing door 33 is closed to prevent dust from overflowing. After the grinding and weighing are completed, the opening and closing door 33 is opened to complete the unloading. The bottom of the grinding chamber 10 is set on an external sample transfer mechanism.

[0025] The top wall of the cooling chamber 5 is rotatably connected to the top of the storage container 3. A toothed ring 35 is embedded in the bottom outer wall of the cooling chamber 5. A servo motor B36 is fixedly connected to the front end of the fixed platform 7 near the toothed ring 35. The top of the output shaft of the servo motor B36 meshes with the toothed ring 35 through the drive wheel 37. When the test is performed, the servo motor B36 drives the drive wheel 37 to rotate, which in turn drives the toothed ring 35 and the cooling chamber 5 to rotate as a whole, so that the three sample storage chambers 4 inside the storage container 3 are aligned with the bottom end of the sample delivery tube 1 in sequence, completing the sample injection and cooling process and realizing automated chamber changing and feeding.

[0026] The electrical components used in the cooling and grinding mechanisms are all equipped with control modules, which are connected to an external control system.

[0027] The implementation principle of the automatic sampling and sample preparation structure of the rare earth molten salt electrolyte lithium fluoride content detection device in this application embodiment is as follows: In use, the device is connected to an external sampling gun through a universal connector 2. The external sampling gun extends from the side of the electrolytic cell to a predetermined depth below the molten salt surface. A small amount of molten salt is drawn into the interior through vacuum suction. The sample enters the sample storage chamber 4 of the storage tank 3 through the sample delivery tube 1. The cooler 16 provides cooling to the cooling chamber 5, so that the sample in the sample storage chamber 4 is cooled and solidified. The servo motor B36 meshes with the gear ring 35 through the drive wheel 37. The cooling chamber 5 rotates, allowing samples to be injected into all three sample storage chambers 4. After the cooling chamber 5 rotates once, the first sample storage chamber 4 is completely cooled. At this time, the electric hydraulic rod 29 moves the adjusting frame 30. The adjusting frame 30 moves the blocking block 9 away from the through hole 8 via the push rod 26. At this time, the through hole 8 is opened. Then, the servo motor A23 drives the lead screw 24 to rotate. The lead screw 24 moves the push rod 6 downward, pushing the solidified sample out of the sample storage chamber 4 and into the through hole 8 on the fixed platform 7, where it contacts the crushing disc 11.

[0028] The drive motor 21 drives three transmission wheels 19 to rotate synchronously through the internal gear ring 20, which in turn drives the rotating shaft 12 to rotate. The crushing blades 17 on the crushing disc 11 perform preliminary cutting and crushing of the sample. While crushing, the push rod 6 continues to move downward until the sample is completely crushed. The rotating shaft 12 drives the grinding rod 14 to move. The grinding rod 14 cooperates with the grinding block 13 to further grind the initially crushed sample. The ground sample powder is guided by the guide plate 32 and falls onto the weighing component 31. The weighing component 31 weighs the sample online. After weighing, the electric telescopic rod 34 drives the opening and closing door 33 to open the discharge port, and the sample powder is discharged to the external sample transfer mechanism, completing the sample preparation process.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device, comprising a sample delivery tube (1), a cooling mechanism and a grinding mechanism, wherein the sample delivery tube (1) is rotatably connected to the top of the cooling mechanism, and a universal connector (2) is sleeved on the top of the sample delivery tube (1), the top of the universal connector (2) is connected to an external sampling gun, and a flow-blocking mechanism is provided between the cooling mechanism and the grinding mechanism, characterized in that: The cooling mechanism includes a storage unit (3), which has three sample storage chambers (4) arranged in an array inside. A cooling chamber (5) is sleeved on the outer surface of the storage unit (3) above the flow obstruction mechanism. A push rod (6) that meshes with the sample storage chamber (4) is provided on the top of the cooling chamber (5). The flow-blocking mechanism includes a fixed platform (7), and the fixed platform (7) has an array of through holes (8) that engage with the sample storage chamber (4). A flow-blocking block (9) is inserted into the through hole (8). The grinding mechanism includes a grinding chamber (10), a crushing disc (11) is rotatably connected inside the grinding chamber (10) below the feed hole (8), a rotating shaft (12) is fixedly connected at the center of the crushing disc (11), and a grinding block (13) is fixedly connected to the inner wall of the grinding chamber (10) below the crushing disc (11). The grinding block (13) is conical, and three grinding rods (14) are arranged in an array near the outer wall of the grinding block (13) outside the rotating shaft (12). The storage container (3) is cylindrical in shape. The top wall of the fixed platform (7) is provided with a snap ring (15) that engages with the storage container (3). The cooler (16) is fixedly connected to the outer wall of the right side of the cooling chamber (5). The cooler (16) is located in the sample storage chamber (4) near the bottom of the sample delivery tube (1). The fixed platform (7) has a slide (25) inside that engages with the material blocking block (9). A push rod (26) is fixedly connected to the top of the end of the material blocking block (9) away from the fixed platform (7). A return spring (27) is fixedly connected between the side wall of the material blocking block (9) and the fixed platform (7). A retraction hole that engages with the return spring (27) is opened inside the fixed platform (7). The grinding chamber (10) has a discharge port at the bottom, and a weighing component (31) is provided at the bottom of the discharge port. The weighing component (31) consists of a weighing sensor and a control module. A guide plate (32) is fixedly connected inside the grinding chamber (10) near the weighing component (31). The guide plate (32) is set at an inclined angle towards the weighing component (31). An opening and closing door (33) is slidably connected to the outer wall of the grinding chamber (10) at the discharge port. An electric telescopic rod (34) is provided between the outer wall of the grinding chamber (10) and the opening and closing door (33). The bottom of the grinding chamber (10) is set on an external sample transfer mechanism. The top wall of the cooling chamber (5) is rotatably connected to the top of the storage container (3). A toothed ring (35) is embedded in the bottom outer wall of the cooling chamber (5). A servo motor B (36) is fixedly connected to the front end of the fixed platform (7) near the toothed ring (35). The top of the output shaft of the servo motor B (36) meshes with the toothed ring (35) through the drive wheel (37).

2. The automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device according to claim 1, characterized in that: The grinding chamber (10) consists of three cylindrical chambers. Several grinding blades (17) are arranged in an array inside the grinding disc (11). The top of the rotating shaft (12) is rotatably connected to the inner wall of the grinding chamber (10), and the bottom of the rotating shaft (12) passes through the center of the grinding block (13).

3. The automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device according to claim 1, characterized in that: There is a gap between the bottom of the grinding block (13) and the inner wall of the grinding chamber (10). The outer wall of the bottom of the grinding block (13) is fixedly connected to the inner wall of the grinding chamber (10) by a conical fixing block (18). The bottom end of the rotating shaft (12) is fixedly connected to a transmission wheel (19) below the grinding block (13). The transmission wheels (19) are meshed with an internal gear ring (20) inside the bottom end of the grinding chamber (10). The grinding chamber (10) has a rotating groove that is rotatably connected to the side wall of the internal gear ring (20). The front end of the grinding chamber (10) is inlaid with a drive motor (21) near the internal gear ring (20). The top of the output shaft of the drive motor (21) meshes with the internal gear ring (20) by a gear.

4. The automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device according to claim 1, characterized in that: The top wall of the cooling chamber (5) is fixedly connected to a support frame (22) on the outer surface of the push rod (6). An extension frame is provided on the top of the push rod (6). A servo motor A (23) is fixedly connected to the rear side of the outer wall of the cooling chamber (5). A lead screw (24) is rotatably connected to the outer wall of the cooling chamber (5) near the position of the servo motor A (23). The bottom end of the lead screw (24) and the top end of the servo motor A (23) are meshed by gears. The top end of the lead screw (24) and the extension frame at the top end of the push rod (6) form a rotatable connection. A guide rod is provided on the top wall of the cooling chamber (5). The guide rod passes through the extension frame at the top end of the push rod (6).

5. The automatic sampling and sample preparation structure for a rare earth molten salt electrolyte lithium fluoride content detection device according to claim 1, characterized in that: The outer wall of the cooling chamber (5) is fixedly connected to an electric hydraulic rod (29) by a connecting frame (28). An adjusting frame (30) is fixedly connected to the bottom of the moving end of the electric hydraulic rod (29). The adjusting frame (30) is arranged in an "L" shape. The side wall of the adjusting frame (30) and the connecting frame (28) form a sliding connection. One end of the adjusting frame (30) engages with the outer wall of the cooling chamber (5).

6. The automatic sampling and sample preparation structure for a lithium fluoride content detection device for rare earth molten salt electrolytes according to claim 1, characterized in that: The electrical components used in the cooling mechanism and the grinding mechanism are all equipped with control modules, which are connected to an external control system.

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