A multi-stage grinding device for sesame oil processing

Abstract

This invention relates to a multi-stage grinding device for sesame oil processing, comprising: a multi-stage stone mill unit, a particle size detection device at the output end of each stone mill unit, and adjacent stone mill units connected by a transfer mechanism; a drive mechanism driving the upper grinding disc to rotate; a control system controlling the operating parameters of the drive mechanism; based on the particle size detection results, when the particle size meets the standard, the transfer mechanism at the output end of the corresponding stone mill unit is opened to transport the ground material to the next stage stone mill unit; when the particle size does not meet the standard, the transfer mechanism at the output end of the corresponding stone mill unit is kept closed, and the grinding parameters of that stage stone mill unit are adjusted according to the detection results after each detection. This application achieves multi-stage coordinated automated closed-loop control by sequentially setting up multiple stone mill units, significantly improving particle size consistency and processing efficiency. Through independent feedback adjustment at each stage, it ensures that the grinding parameters at each stage match the actual state of the material, thereby improving the quality stability of the sesame oil.

Description

Technical Field

[0001] This invention relates to the technical field of grain and oil processing equipment, specifically to a multi-stage grinding device for processing sesame oil. Background Technology

[0002] Sesame oil is loved by consumers for its unique flavor and rich nutrition. Stone grinding, as a traditional method of sesame oil processing, can better preserve the nutrients and natural flavor of sesame.

[0003] Existing stone mill processing equipment is mostly single-machine operation, resulting in low processing efficiency and poor particle size consistency. Therefore, to improve the quality and processing efficiency of stone-ground sesame oil, this application provides a multi-stage grinding device for sesame oil processing. Summary of the Invention

[0004] Based on the above description, the present invention provides a multi-stage grinding device for sesame oil processing to solve the problems of low processing efficiency and poor particle size consistency in single-machine independent operation.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: This application provides a multi-stage grinding device for processing sesame oil, comprising: The multi-stage stone mill unit is arranged in sequence. Each stage of the stone mill unit is equipped with a particle size detection device at its output end. The particle size detection device is used to detect the output particle size of the stone mill unit. Adjacent stone mill units are connected by a transfer mechanism, which is used to transport the material ground by the previous stage stone mill unit to the next stage stone mill unit. A drive mechanism is used to drive the upper grinding disc in each level of the stone mill unit to rotate for grinding. The control system is electrically connected to the drive mechanism, the transfer mechanism and the particle size detection device. The control system adjusts the grinding parameters of the stone mill unit by controlling the operating parameters of the drive mechanism. The control system is configured as follows: According to the detection results of the particle size detection device, when the particle size meets the standard, the transfer mechanism at the output end of the corresponding stone mill unit is opened to transport the ground material to the next level stone mill unit. When the particle size is found to be substandard, the transfer mechanism at the output end of the corresponding stone mill unit is kept closed, and the grinding parameters of the stone mill unit are adjusted according to the test results after each test.

[0006] Preferably, each level of the stone mill unit is configured to have a different target particle size, and the target particle size of the next level stone mill unit is smaller than that of the previous level.

[0007] Preferably, the transfer mechanism includes a switching assembly for controlling the opening and closing of the discharge port of the previous-level stone mill unit.

[0008] Preferably, the height of the discharge port of the upper-level stone mill unit is higher than the height of the inlet of the lower-level stone mill unit. The transfer mechanism includes a guide component, the input end and the output end of which are respectively connected to the discharge port of the upper-level stone mill unit and the inlet of the lower-level stone mill unit.

[0009] Preferably, the guide component is a guide trough.

[0010] Preferably, the transfer mechanism insulates the material during transport to keep the material's temperature within a set range.

[0011] Preferably, a conditioning component is provided between the final stage stone mill unit and the previous stage stone mill unit, the conditioning component being used to spray and humidify the material being conveyed to the final stage stone mill unit.

[0012] Preferably, the conditioning component includes a constant temperature water tank and an atomizing nozzle.

[0013] Preferably, it also includes a grinding disc gap adjustment mechanism, which is used to synchronously adjust the grinding gap of the multiple stages of the stone mill unit.

[0014] Preferably, the ratio of the grinding gap adjustment amount of each level of the stone mill unit is a preset value, and the grinding gap adjustment amount decreases sequentially from the first-level stone mill unit to the last-level stone mill unit.

[0015] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects: 1. This application employs a multi-stage stone mill unit, with each stage's output equipped with a particle size detection device. Adjacent stages are connected by a transfer mechanism. The control system makes real-time decisions based on the detection results. When the particle size meets the standard, the transfer mechanism is activated to send the material to the next stage; when the particle size does not meet the standard, the transfer mechanism remains closed, allowing the material to circulate and grind within the current stage. Simultaneously, the grinding parameters for each stage are dynamically adjusted based on the results of each detection. Compared to existing methods of independent single-machine operation and manual particle size judgment, this achieves multi-stage collaborative automated closed-loop control, preventing unqualified materials from entering the next stage or the finished product, significantly improving particle size consistency and processing efficiency. Furthermore, through independent feedback adjustment at each stage, it ensures that the grinding parameters at each stage match the actual state of the material, reducing over-grinding or under-grinding and improving the quality stability of sesame oil.

[0016] 2. The interstage transfer mechanism controls the opening and closing of the discharge port of the stone mill unit via a switching component. Combined with the gravity-fed design where the discharge port is higher than the inlet, material transfer requires no additional power. A reciprocating scraper is installed within the guide component to continuously agitate the material, effectively preventing viscous materials from clumping or clogging during transport. The transfer mechanism has a heat preservation function, maintaining the material within the set temperature range throughout the transport process, preventing grease from solidifying or losing fluidity due to temperature fluctuations. The coordinated action of these structures ensures smooth material transport, temperature stability, and anti-caking capabilities during multi-stage grinding, thus providing uniform, stable, and suitable material conditions for subsequent grinding.

[0017] 3. A conditioning component is installed between the final stone mill unit and the previous one. This component uses a constant-temperature water tank and atomizing nozzles to spray and humidify the material before it enters the final fine grinding stage, precisely adjusting the material's moisture content. Appropriate moisture addition helps soften sesame fibers, reduces grinding resistance, and makes the final grinding process finer and more uniform. It also prevents powder splashing or electrostatic adsorption caused by excessive drying. Moisture also promotes the separation of oil and residue during grinding, increasing the extraction rate and flavor release of sesame oil. This conditioning component gives the device a moisture control function, further improving the taste and oil quality of the final product.

[0018] 4. By setting up a grinding disc gap adjustment mechanism and synchronously adjusting the grinding gap of the multi-stage stone grinding units, the grinding gap of each stage of the stone grinding unit can be quickly adjusted to the appropriate value. This simplifies the operation process, eliminating the need for individual manual adjustment of each stage and significantly reducing the difficulty of adjustment and the need for manual intervention. The progressively decreasing adjustment amount matches the adjustment requirements of coarse grinding and fine grinding, achieving the best pulverization effect throughout the entire grinding process and significantly improving the intelligence level and processing efficiency of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the multi-stage grinding device for sesame oil processing provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the stone mill unit and vibration damping components in the multi-stage grinding device for sesame oil processing provided in an embodiment of the present invention; Figure 3 for Figure 2 A magnified view of a portion of region A in the middle; Figure 4 This is a schematic diagram of the drive mechanism in the multi-stage grinding device for sesame oil processing provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the switch baffle in the multi-stage grinding device for sesame oil processing provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the conditioning component in a multi-stage grinding device for sesame oil processing provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Stone mill unit; 11. Upper grinding disc; 12. Lower grinding disc; 2. Transfer mechanism; 21. Switch baffle; 22. Guide component; 3. Frame; 31. Vibration damping pads; 32. Moving rollers; 33. Guide column; 4. Vibration damping assembly; 41. Support plate; 42. First sleeve; 43. Second sleeve; 44. Spring; 5. Drive mechanism; 51. Main drive motor; 52. Gearbox; 53. Drive shaft; 6. Screw mechanism; 7. Conditioning assembly; 71. Constant temperature water tank; 72. Atomizing nozzle; 8. Particle size detection device; 9. Feed hopper. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0023] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0024] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0025] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0026] Reference Figure 1 As shown, this application provides a multi-stage grinding device for processing sesame oil. The device includes a multi-stage stone mill unit 1 arranged in sequence. Two adjacent stone mill units 1 are connected by a transfer mechanism 2. The transfer mechanism 2 is used to transport the material ground by the previous stone mill unit 1 to the next stone mill unit 1.

[0027] By arranging multi-stage stone mill units 1 in series and utilizing a transfer mechanism 2 to achieve automatic inter-stage conveying, a continuous and closed grinding production line is formed, eliminating the need for manual transfer or intermediate storage, thus significantly improving production efficiency. Simultaneously, the directional and orderly flow of materials between stages avoids the mixing of materials of different particle sizes, facilitating segmented operations for coarse, fine, and high-precision grinding, thereby improving the particle size uniformity and processing stability of the final product.

[0028] In this system, each level of stone mill unit 1 is configured with a different target particle size, with the target particle size of the next level stone mill unit 1 being smaller than that of the previous level. Each level of stone mill unit 1 undertakes a specific grinding task, thereby achieving graded and progressively refined particle size of the material. This allows the grinding parameters at each level to be independently optimized for their own target particle size, improving overall grinding efficiency and the uniformity of the finished product particle size. The progressively decreasing target particle size also ensures that the final product achieves the required fineness, and the intermediate products exhibit good consistency, which is beneficial for improving the flavor release and oil quality of sesame oil.

[0029] According to the target particle size requirements, the materials and grinding patterns of each level of the stone mill unit 1 can be adapted by those skilled in the art as needed. For example, taking a stone mill unit 1 with three levels as an example, the first level coarse grinding stone mill can be made of granite with a grinding pattern of cross-hatching, the second level fine grinding stone mill can be made of basalt with a spiral grinding pattern, and the third level fine grinding stone mill can be made of natural bluestone with a fine mesh grinding pattern.

[0030] Reference Figure 1 As shown, in this embodiment, each level of the stone grinding unit 1 is mounted on the frame 3. The bottom of the frame 3 is provided with vibration damping pads 31 and moving rollers 32 to facilitate the movement of the stone grinding unit 1 and reduce vibration during operation.

[0031] Reference Figure 1 and Figure 2As shown, the stone mill unit 1 includes an upper grinding disc 11 and a lower grinding disc 12. The lower grinding disc 12 is supported on the frame 3 by a vibration damping component 4, while the upper grinding disc 11 is rotatably mounted on the frame 3.

[0032] Reference Figure 2 and Figure 3 As shown, specifically, the vibration damping component 4 includes two support disks 41 arranged vertically. Multiple vibration damping structures are arranged between the two support disks 41. Each vibration damping structure includes a first sleeve 42 and a second sleeve 43 with vertical axes. The first sleeve 42 is located at the bottom of the upper support disk 41, and the second sleeve 43 is located at the top of the lower support disk 41. The first sleeve 42 is coaxially inserted into the second sleeve 43. A spring 44 is installed inside the first sleeve 42, with its two ends abutting against the upper and lower support disks 41 respectively. This allows the upper support disk 41 to rise and fall vertically through the cooperation of the first sleeve 42 and the second sleeve 43, compressing the spring 44 during descent. The lower grinding disk 12 is mounted on the upper support disk 41, allowing it to compress the spring 44 to buffer the impact of large grinding forces and reduce wear.

[0033] The frame 3 is equipped with a drive mechanism 5, which is used to drive the upper grinding disc 11 in each level of the stone grinding unit 1 to rotate for grinding.

[0034] Reference Figure 1 and Figure 4 As shown, in this embodiment, the drive mechanism 5 includes a main drive motor 51 and multiple drive units, each corresponding to a stone grinding unit 1 to transmit power from the drive motor to the corresponding stone grinding unit 1. Specifically, each drive unit includes a gearbox 52 and a drive shaft 53. The drive shaft 53 is vertically positioned, passing through the center of the lower grinding disc 12 and connecting to the upper grinding disc 11. The drive shaft 53 passes through two support discs 41. The rotation of the drive shaft 53 causes the upper grinding disc 11 to rotate, and the upper grinding disc 11 is supported vertically by the drive shaft 53, preventing the upper grinding disc 11 from rising or falling with the lower grinding disc 12, thus allowing adjustment of the grinding gap. The output end of the gearbox 52 is connected to the drive shaft 53 to reduce the speed of the motor power and output it to the drive shaft 53. Multiple gearboxes 52 are connected through synchronous belts and gears to simultaneously transmit motor power to multiple upper grinding discs 11, and the gearbox 52 has a shifting function to adjust the speed of the drive shaft 53. Specifically, the gearbox 52 can be an electric gearbox to achieve automated control. Therefore, the upper grinding discs 11 of multiple stone mill units 1 can be driven to rotate synchronously by the drive mechanism 5, and the rotation speed of the upper grinding discs 11 of each stone mill unit 1 can be achieved independently.

[0035] In this embodiment, the grinding gap of the stone grinding unit 1 is adjusted through a grinding disc gap adjustment mechanism. This mechanism is designed to simultaneously adjust the grinding gaps of multiple stone grinding units 1. Since the target particle size of each stone grinding unit 1 is different, and the target particle size of the next level stone grinding unit 1 is smaller than that of the previous level, the grinding gap adjustment amount of each level of stone grinding unit 1 is adjusted according to a designed ratio. That is, the ratio of the grinding gap adjustment amounts of each level of stone grinding unit 1 is a preset value, and the grinding gap adjustment amount decreases sequentially from the first level stone grinding unit 1 to the last level stone grinding unit 1. For example, the ratio can be designed as 5:3:1, meaning that when the first level stone grinding unit 1 is adjusted by 0.5mm, the second level stone grinding unit 1 is adjusted by 0.3mm, and the third level stone grinding unit 1 is adjusted by 0.1mm.

[0036] Reference Figure 1 and Figure 2 As shown, specifically, the grinding disc gap adjustment mechanism can be composed of a motor and a lead screw mechanism 6. Each grinding unit 1 is equipped with a set of lead screw mechanisms 6. The lead screw mechanism 6 is mounted on the frame 3 with the lead screw axis vertical. The slider of the lead screw mechanism 6 is fixed to the support plate 41 located below in the corresponding grinding unit 1. The slider is raised and lowered by rotating the lead screw, which in turn raises and lowers the support plate 41 and the lower grinding disc 12 on it, thereby adjusting the gap between the upper grinding disc 11 and the lower grinding disc 12, thus achieving the adjustment of the grinding gap. In order to achieve synchronous adjustment and different adjustment ratios, the motor can drive multiple lead screws to rotate synchronously through a synchronous belt and a synchronous pulley. The pitch of the lead screw in each lead screw mechanism 6 can be designed according to the gap adjustment ratio of each grinding unit 1 to achieve synchronous adjustment with different amounts.

[0037] When it is necessary to adjust the grinding precision, the gap of each grinding disc is adjusted according to a preset ratio by the grinding disc gap adjustment mechanism to adapt to different processing requirements.

[0038] Reference Figure 2 As shown in this embodiment, to ensure the stability of the lower grinding disc 12, a guide structure for guiding the vibration damping component 4 is provided on the frame 3. The guide structure includes multiple vertical guide posts 33, and the lower support disc 41 is simultaneously fitted onto the multiple guide posts 33, so that the multiple guide posts 33 can guide and support the support disc 41. The connection and installation methods of the motor, synchronous belt, synchronous pulley and lead screw are all conventional technical means, and will not be described in detail in this embodiment.

[0039] The material ground by the previous stone mill unit 1 is transported to the next stone mill unit 1 through the transfer mechanism 2. In order to prevent the material that is not properly ground from being output from the stone mill unit 1, the transfer mechanism 2 is configured to include a switch assembly for controlling the opening and closing of the discharge port of the previous stone mill unit 1.

[0040] Reference Figure 5As shown, the specific switch assembly can be designed as a liftable switch baffle 21. This switch baffle 21 is located at the discharge port on the lower grinding disc 12. When it descends, it closes the discharge port, preventing material from being discharged. When the switch baffle 21 rises, material can be discharged from the discharge port. The specific switch baffle 21 can be designed according to the shape and size of the discharge port. The lifting and lowering of the switch baffle 21 can be driven by a cylinder, thereby achieving automated control. The specific drive structure of the switch baffle 21 can be designed by those skilled in the art according to actual needs, which is a conventional technical means and will not be described in detail here.

[0041] In this embodiment, the height of the discharge port of the upper-level stone mill unit 1 is set to be higher than the height of the inlet of the lower-level stone mill unit 1, and the transfer mechanism 2 is configured to include a guide component 22, the input end and the output end of the guide component 22 being connected to the discharge port of the upper-level stone mill unit 1 and the inlet of the lower-level stone mill unit 1, respectively.

[0042] Reference Figure 1 As shown, specifically, the guide component 22 can be a top-opening guide trough, and the two ends of the guide trough are designed to have a height difference so that the material output from the upper-level stone mill unit 1 can flow by gravity through the guide trough to the lower-level stone mill unit 1 without the need for additional power to transfer the material.

[0043] Furthermore, to prevent material from clumping and clogging during transport within the guide member 22, a scraper capable of reciprocating along the material transport direction can be installed within the guide member 22. The scraper agitates the material being transported within the guide member 22. Specifically, in this embodiment, the guide trough is designed with inclined sections at both ends and a straight section in the middle. The scraper can be a scraper blade, with its lower side conforming to the bottom inner wall of the straight section in the middle of the guide trough. The reciprocating movement of the scraper can be achieved through an electric push rod or a crank-connecting rod mechanism. The specific installation and driving method of the scraper is a conventional technique and will not be elaborated upon in this embodiment. The continuous agitation of the scraper blade effectively prevents viscous materials from clumping and clogging during transport.

[0044] In this embodiment, the transfer mechanism 2 is also designed to insulate and transport materials so that the temperature of the materials is maintained within a set range. Specifically, a constant temperature insulation layer can be wrapped around the outside of the guide trough to keep the materials warm and prevent temperature fluctuations from causing the grease to solidify or lose fluidity. The constant temperature insulation layer can be an electric heating jacket, etc.

[0045] Reference Figure 1 and Figure 6 As shown, a conditioning component 7 is further provided between the final stone mill unit 1 and the previous stone mill unit 1. The conditioning component 7 is used to spray and humidify the material conveyed to the final stone mill unit 1.

[0046] Reference Figure 1 and Figure 6 As shown, in this embodiment, the conditioning component 7 includes a constant temperature water tank 71 and atomizing nozzles 72. The constant temperature water tank 71 is fixed on the frame 3. Multiple atomizing nozzles 72 are arranged above the material guide chute, spaced apart along the width of the material guide chute, and their arrangement should avoid interference with the scraper. The atomizing nozzles 72 are connected to the outlet of the constant temperature water tank 71 through pipes. The warm water in the constant temperature water tank 71 is atomized by the atomizing nozzles 72 and sprayed onto the material being conveyed in the material guide chute, achieving spray humidification and conditioning of the material. Specifically, an electric valve can be installed at the outlet of the constant temperature water tank 71 to achieve opening and closing through electric control.

[0047] The conditioning component 7 precisely adjusts the moisture content of the material. Appropriate moisture addition helps soften sesame fibers, reduces grinding resistance, and makes the final grinding process finer and more uniform. It also prevents powder splattering or electrostatic adsorption caused by excessive drying. Moisture also promotes the separation of oil and residue during grinding, increasing the extraction rate and flavor release of sesame oil. This moisture control function further enhances the taste and oil quality of the final product.

[0048] Reference Figure 1 As shown in this embodiment, a particle size detection device 8 is provided at the output end of each stage of the stone mill unit 1. The particle size detection device 8 is used to detect the output particle size of the stone mill unit 1. The particle size detection device 8 can be an online particle size analyzer. The specific model can be selected by those skilled in the art as needed to realize online detection of material particle size and provide a reference for judging whether the grinding target has been achieved.

[0049] Reference Figure 1 As shown, in this embodiment, a feed hopper 9 is provided at the feed inlet of the upper grinding disc 11 of the first-stage stone mill unit 1. The feed hopper 9 is installed on the frame 3. The feed hopper 9 is a hopper with a vibrator to avoid material blockage.

[0050] Furthermore, in order to achieve automated control of the entire grinding process, the grinding device is also equipped with a control system. The control system is electrically connected to the drive mechanism 5, the transfer mechanism 2 and the particle size detection device 8. The control system adjusts the grinding parameters of the stone mill unit 1 by controlling the operating parameters of the drive mechanism 5. The control system also controls the start or stop of the transfer mechanism 2.

[0051] In this embodiment, the control system is configured as follows: According to the detection results of particle size detection device 8, when the particle size meets the standard, the transfer mechanism 2 at the output end of the corresponding stone mill unit 1 is opened to transport the ground material to the next level stone mill unit 1.

[0052] When the particle size is found to be substandard, the transfer mechanism 2 at the output end of the corresponding stone mill unit 1 is kept closed, and the grinding parameters of the stone mill unit 1 are adjusted according to the test results after each test.

[0053] Specifically, the particle size detection device 8 is designed to detect the output particle size of the stone mill unit 1 in real time, with the grinding parameter being the rotational speed of the upper grinding disc 11. During initial grinding, the system initially sets the grinding speed of each level of the stone mill unit 1. After a set time, the control system determines whether to activate the transfer mechanism 2 based on the detection results of the particle size detection device 8. If the detected particle size meets the standard, the control system activates the transfer mechanism 2 to transport the ground material to the next level of the stone mill unit 1. If the particle size does not meet the standard, the control system keeps the transfer mechanism 2 closed and adjusts the rotational speed of the upper grinding disc 11 of that level of the stone mill unit 1 based on the detection results. After another set time of grinding, the control system again determines whether to activate the transfer mechanism 2 based on the detection results of the particle size detection device 8, and repeats the above process.

[0054] This enables the automation and intelligentization of the grinding process. It achieves multi-level collaborative automated closed-loop control, preventing substandard materials from entering the next stage or the finished product, significantly improving particle size consistency and processing efficiency. Simultaneously, through independent feedback adjustment at each stage, it ensures that the grinding parameters at each level match the actual state of the material, reducing over-grinding or under-grinding and improving the quality stability of sesame oil.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage grinding device for processing sesame oil, characterized in that, include: The multi-stage stone mill unit (1) is arranged in sequence. Each stage of the stone mill unit (1) is equipped with a particle size detection device (8) at its output end. The particle size detection device (8) is used to detect the output particle size of the stone mill unit (1). The adjacent two stages of the stone mill unit (1) are connected by a transfer mechanism (2). The transfer mechanism (2) is used to transport the material ground by the previous stage stone mill unit (1) to the next stage stone mill unit (1). The drive mechanism (5) is used to drive the upper grinding disc (11) in each level of the grinding unit (1) to rotate for grinding; The control system is electrically connected to the drive mechanism (5), the transfer mechanism (2) and the particle size detection device (8). The control system adjusts the grinding parameters of the stone mill unit (1) by controlling the operating parameters of the drive mechanism (5). The control system is configured as follows: According to the detection result of the particle size detection device (8), when the particle size meets the standard, the transfer mechanism (2) at the output end of the corresponding stone mill unit (1) is opened to transport the ground material to the next level stone mill unit (1). When the particle size is found to be substandard, the transfer mechanism (2) at the output end of the corresponding stone mill unit (1) is kept closed, and the grinding parameters of the stone mill unit (1) are adjusted according to the test results after each test.

2. The multi-stage grinding device for sesame oil processing according to claim 1, characterized in that: Each level of the stone mill unit (1) is configured to have a different target particle size, and the target particle size of the next level stone mill unit (1) is smaller than that of the previous level.

3. The multi-stage grinding device for sesame oil processing according to claim 1, characterized in that: The transfer mechanism (2) includes a switch assembly for controlling the outlet switch of the upper-level stone mill unit (1).

4. The multi-stage grinding device for sesame oil processing according to claim 3, characterized in that: The height of the discharge port of the upper-level stone mill unit (1) is higher than the height of the feed port of the lower-level stone mill unit (1). The transfer mechanism (2) includes a guide (22), the input end and the output end of the guide (22) are respectively connected to the discharge port of the upper-level stone mill unit (1) and the feed port of the lower-level stone mill unit (1).

5. The multi-stage grinding device for sesame oil processing according to claim 4, characterized in that: The guide component (22) is a guide groove.

6. The multi-stage grinding device for sesame oil processing according to claim 1, characterized in that: The transfer mechanism (2) insulates and transports materials to keep the temperature of the materials within a set range.

7. The multi-stage grinding device for sesame oil processing according to claim 1, characterized in that: A conditioning component (7) is provided between the final stage stone mill unit (1) and the previous stage stone mill unit (1), the conditioning component (7) being used to spray and humidify the material being conveyed to the final stage stone mill unit (1).

8. The multi-stage grinding device for sesame oil processing according to claim 7, characterized in that: The conditioning component (7) includes a constant temperature water tank (71) and an atomizing nozzle (72).

9. The multi-stage grinding device for processing sesame oil according to any one of claims 1-8, characterized in that: It also includes a grinding disc gap adjustment mechanism, which is used to synchronously adjust the grinding gap of the multi-stage stone mill unit (1).

10. The multi-stage grinding device for sesame oil processing according to claim 9, characterized in that: The grinding gap adjustment ratio of each level of the stone mill unit (1) is a preset value, and the grinding gap adjustment decreases sequentially from the first-level stone mill unit (1) to the last-level stone mill unit (1).

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