An automatic feeding intelligent continuous stone mill tea rubbing machine unit and a control method thereof

Abstract

The application relates to the technical field of tea grinding, in particular to an automatic feeding intelligent continuous stone mill matcha machine set and a control method, mainly solves the problems of configuration and control method of the stone mill set required by continuous production, structural innovation of a single machine electric stone mill, reduction of tea powder pollution of the motor and safety problems caused by grinding, and solves the technical problems of how to design a feeding and batching system when the main motor is arranged on the top.

Description

Technical Field

[0001] This invention relates to the field of stone-ground matcha processing, specifically to an intelligent continuous stone-ground matcha processing unit with automatic feeding and a control method. Background Technology

[0002] Traditionally, matcha production is done using a single stone mill, resulting in low productivity (typically 30-50 g / h), complex operation, and the need for manual assistance. Ball mills are difficult to use for continuous and intelligent production, and the high grinding heat negatively impacts matcha quality, making ball mill-produced matcha of lower quality than stone-ground matcha. To address these issues, this invention provides equipment and control methods for continuous and intelligent production. The main problems addressed include the configuration and control methods for stone mill units required for continuous production; structural innovation of the single-unit electric stone mill; and the design of the feeding and batching system to minimize motor contamination and safety issues associated with top-mounted main motors. Summary of the Invention

[0003] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides an intelligent continuous stone grinding matcha machine unit with automatic feeding and a control method.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An intelligent continuous stone-ground matcha machine unit with automatic feeding and control method includes a feeding unit and a distributing unit arranged at the outlet of the feeding unit. Each distributing port of the distributing unit is equipped with a grinding unit, and the outlet of each grinding unit is connected to a receiving unit to collect matcha powder.

[0006] As a further aspect of the present invention: to reduce the pollution of the motor and safety issues caused by tea powder generated during grinding, the main motor is positioned at the top due to the lower dust content. The grinding unit includes a frame, on which a lower grinding disc is fixedly mounted. An upper grinding disc is coaxially rotatably connected to the upper surface of the lower grinding disc, and the surfaces of the upper and lower grinding discs in contact with each other constitute the grinding surface. An eccentrically arranged guide hole is provided on the upper grinding disc, and the inlet end of the guide hole is connected to a feed funnel. The feed funnel is coaxially fixed to the upper surface of the upper grinding disc. A drive component for rotating the upper grinding disc is installed on the upper grinding disc.

[0007] As a further embodiment of the present invention: the driving component includes a drive motor, and a drive gear is mounted on the output shaft of the drive motor; a transmission frame is fixedly connected to the upper grinding disc, and a movable disc arranged coaxially with the upper grinding disc is mounted on the transmission frame; a rotating disc is rotatably mounted coaxially on the fixed disc, and a gear ring is coaxially mounted on the rotating disc; the gear ring and the drive gear mesh with each other for transmission. The advantage of the above structure is that the cavity formed inside the gear ring is located below the hopper, allowing for top feeding, which simplifies the feeding structure; otherwise, side feeding would be required, resulting in a complex structure.

[0008] As a further embodiment of the present invention: a receiving groove for receiving matcha falling from the grinding surface is coaxially arranged on the lower grinding disc, and a feeding pipe for feeding is connected to the bottom of the receiving groove; brushes are symmetrically installed on the upper grinding disc, and the brushes are arranged in the receiving groove around the axis of the upper grinding disc, with the brush bristles in contact with the bottom of the receiving groove.

[0009] As a further aspect of the present invention: the contact surfaces of the upper and lower grinding discs are each provided with a fan-shaped grinding area, and the center of each fan-shaped grinding area is located at the intersection of the corresponding regular polygons; the fan-shaped grinding area includes straight grinding grooves, and each grinding groove in the same fan-shaped grinding area is arranged parallel to the side of the regular polygon where the center of the fan-shaped grinding area is located, and each grinding groove is arranged equidistantly outward along the direction perpendicular to the side of the regular polygon, and each fan-shaped grinding area is spliced ​​together to form the grinding surface.

[0010] As a further embodiment of the present invention: the material distribution unit includes a transfer funnel for receiving materials, the transfer funnel is connected to the auger housing, and the auger housing is coaxially rotatably connected to the auger guide plate; the bottom of the auger housing is provided with a discharge pipe, and the bottom of each discharge pipe is connected to a batching bin, the batching bin being connected to the feed funnel.

[0011] As a further embodiment of the present invention: a slide rail is installed at the outlet of the discharge pipe, a discharge baffle is slidably arranged in the slide rail, and a discharge electric push rod is installed between the discharge baffle and the discharge pipe. The discharge electric push rod can pull the discharge baffle to move radially along the discharge pipe toward the outlet to make the outlet open and close in a reciprocating linear sliding motion.

[0012] As a further embodiment of the present invention: a material distribution gate is arranged at the outlet of the batching silo, and a material distribution electric push rod is installed between the material distribution gate and the batching silo. The material distribution electric push rod can pull the material distribution gate to move towards the outlet of the batching silo, so that the outlet opens and closes in a reciprocating linear sliding motion; the material receiving unit includes a conveyor arranged at the bottom of each material drop pipe, the conveyor includes a support base, a conveyor belt and a conveyor motor for driving the conveyor belt to rotate are arranged on the support base; a roller brush for cleaning the material receiving surface of the conveyor belt is also arranged on the support base; the material feeding unit includes a vertical elevator, and a transfer funnel is arranged on the material drop trajectory of the vertical elevator.

[0013] As a further aspect of the present invention: an upper limit photoelectric switch is arranged at the maximum storage capacity position of the ingredient hopper, and a lower limit photoelectric switch is arranged at the minimum storage capacity position of the ingredient hopper; a capacity sensor is arranged at the lowest position of the feed funnel.

[0014] A control method for a stone mill matcha machine includes the following steps:

[0015] S1. The tea leaves are transported by the vertical elevator to the transfer hopper where materials need to be added. When the upper limit photoelectric switch in the mixing hopper detects that the volume of tea leaves in the mixing hopper has reached the upper limit, the vertical elevator stops feeding material into the transfer hopper. When the upper limit photoelectric switch in the mixing hopper detects that the volume of tea leaves in the mixing hopper is insufficient, the tea leaves in the transfer hopper fall into the auger housing, and the auger motor drives the tea leaves to be transported to each discharge pipe.

[0016] S2. When the amount of tea in any ingredient bin is insufficient, the electric push rod at the feeding pipe opens the feeding baffle, allowing the tea to fall into the quantitative ingredient bin; when the amount of tea in the ingredient bin reaches the upper limit, the electric push rod opens the feeding baffle and closes, stopping the feeding.

[0017] S3. When the capacity sensor detects that the amount of tea leaves in the feed hopper is insufficient, the dispensing valve at the bottom of the mixing chamber opens as the dispensing electric push rod extends, replenishing the material into the feed hopper; when the capacity sensor detects that the amount of tea leaves in the feed hopper reaches the upper limit, the dispensing valve at the bottom of the mixing chamber closes as the dispensing electric push rod shortens, stopping the replenishment of material into the feed hopper.

[0018] S4. After the materials are separated, the upper and lower grinding discs are used to grind the tea leaves.

[0019] S5. The tea powder is swept onto the conveyor belt by a brush, and the tea powder on the surface of the conveyor belt moves horizontally with the conveyor belt and is brushed into the collection box by a roller brush.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The present invention can effectively improve the grinding efficiency of tea by coordinating the feeding unit, the dispensing unit, the grinding unit and the receiving unit.

[0022] 2. This invention utilizes upper and lower limit photoelectric switches and electric push rods to design a batching bin that can automatically feed and stop feeding. The batching bins and the feeding pipe work together to ensure that the grinding process is automated and continuous.

[0023] 3. The main motor of this invention is mounted on the top, which reduces the contamination of the motor by tea powder generated during grinding and reduces safety issues.

[0024] 4. The present invention adopts a gear ring coaxially mounted on a rotating disk. The gear ring meshes with the drive gear for transmission. The cavity formed inside the gear ring of this structure is located below the hopper, which can be used for top feeding. This simplifies the feeding structure and solves the technical problem that it is difficult to feed from directly above when the main motor is located on top.

[0025] 5. When the temperature of the upper and lower grinding discs is too high during the grinding process of this invention, the grinding effect will be poor and the quality of tea will decrease. Therefore, a cooling unit is needed to control the operating temperature of the grinding discs. When the temperature sensor of the lower grinding disc detects that the temperature of the grinding disc is higher than the upper limit, the upper and lower fans start to run, release cold air to reduce the temperature of the grinding discs and ensure the quality of tea grinding. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the auger conveyor mechanism in this invention.

[0028] Figure 3 This is a schematic diagram of the material discharge baffle in this invention.

[0029] Figure 4 This is a schematic diagram of the structure of the ingredient storage bin in this invention.

[0030] Figure 5 This is a schematic diagram of the structure of the fixed plate and the moving plate in this invention.

[0031] Figure 6 This is a schematic diagram of the structure of the grinding machine unit in this invention.

[0032] Figure 7 This is a cross-sectional view of the grinding machine unit in this invention.

[0033] Figure 8 This is a schematic diagram of the structure of the grinding groove in this invention.

[0034] Figure 9 This is a schematic diagram of the material receiving unit in this invention.

[0035] Figure 10 This is a schematic diagram of the structure of the fan in this invention.

[0036] In the picture:

[0037] 10. Feeding unit; 11. Vertical elevator;

[0038] 20. Material distribution unit; 21. Transfer hopper; 22. Screwdriver housing; 23. Screwdriver motor;

[0039] 24. Screwdriver guide vane; 25. Discharge pipe; 26. Discharge baffle; 27. Electric discharge push rod;

[0040] 28. Batching bin; 281. Upper limit photoelectric switch; 282. Lower limit photoelectric switch; 283. Distributing valve; 284. Distributing electric push rod; 2810. Upper limit reflector; 2820. Lower limit reflector;

[0041] 30. Grinding unit; 31. Lower grinding disc; 311. Feed pipe; 312. Semiconductor cooler; 313. Cooling unit cover; 314. Temperature sensor; 32. Upper grinding disc; 321. Brush; 322. Grinding groove; 33. Transmission frame; 34. Fixed disc; 35. Moving disc; 350. Steel ball rolling element; 36. Gear ring; 37. Drive motor; 38. Drive gear; 39. Feed funnel; 391. Support; 392. Ultrasonic sensor;

[0042] 40. Receiving unit; 41. Conveyor belt; 42. Roller brush; 43. Conveyor motor. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the four electric stone mill units cascaded together. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Reference Figures 1-10 The feeding unit 10 is used to obtain the material delivered from the outside and distribute the material to the distributing unit 20. The distributing unit 20 is used to automatically and quantitatively output the tea raw material to the four grinding units 30. The receiving unit 40 is used to collect the tea powder ground by the four grinding units 30.

[0045] Feeding unit 10: The feeding unit 10 includes a vertical elevator 11 for transporting tea leaves.

[0046] The material distribution unit 20 includes a transfer funnel 21, which is located below the material drop trajectory of the vertical elevator 11 to catch the tea leaves falling from the vertical elevator 11. The bottom of the transfer funnel 21 is connected and communicates with the auger housing 22. The auger housing 22 is fixed to the frame by a support plate 201.

[0047] The lower end of the auger housing 22 has four discharge pipes 25. Each discharge pipe 25 has a baffle mechanism at its lower part, which is connected to its respective batching bin 28. When the tea height in a batching bin 28 is below the lower limit photoelectric switch 282, it indicates that the amount of tea in the bin is insufficient. The infrared light emitted by the lower limit photoelectric switch 282 is reflected by the lower limit photoelectric switch and received by the infrared receiver tube inside the lower limit photoelectric switch 282, which gives a signal that the amount of tea is insufficient. The PLC receives the signal and drives the electric push rod 27 to extend, causing the discharge baffle 26 to open and discharge the tea. When the upper limit photoelectric switch 281 inside the batching bin 28 is triggered, the discharge electric push rod 27 retracts, causing the discharge baffle 26 to close and stop the discharge.

[0048] The auger motor 23 is mounted on the auger housing 22 via a connecting flange. The auger motor 23 is a variable frequency geared motor with a rated power of 0.4 kW.

[0049] The batching bins 28 are fixed on the frame, and the inlets of each batching bin 28 correspond one-to-one with the drop pipes 25 of the auger housing 22 of the conveying unit. Each batching bin 28 is located directly above each grinding unit 30. Upper limit photoelectric switches 281 and 282 are used to detect the upper and lower material levels within the batching bins 28. The lower limit photoelectric switch 282 is triggered when the material level in the batching bin 28 is lower than the set lower limit value, and the upper limit photoelectric switch 281 is triggered when the material level in the batching bin 28 is higher than the set upper limit value.

[0050] In this embodiment, an automatic batching unit is installed on each of the four batching bins 28. The automatic batching unit consists of a dispensing valve 283, an electric push rod 284, and a slide rail. The batching bins 28 are connected to the auger housing. The dispensing valve 283 moves linearly along its slide rail.

[0051] When the upper limit photoelectric switch 281 is triggered, the batching bin has reached the predetermined amount of material. The PLC-controlled electric push rod 284 retracts, causing the dispensing valve 283 to close the batching bin outlet. When the lower limit photoelectric switch 282 is triggered, it indicates that the batching bin is low on material. The PLC-controlled electric push rod 284 extends, causing the dispensing valve 283 to open the batching bin outlet and discharge material. Inside the batching bin 28, the volume of the batching bin between the upper limit photoelectric switch 281 and the lower limit photoelectric switch 282 is equal to the required amount of tea leaves in the feeding funnel 39. Below each of the four ingredient bins 28 is a corresponding feeding hopper 39. An ultrasonic sensor 392 is installed above the feeding hopper 39 to detect the distance between the tea material level in the feeding hopper 39 and the ultrasonic sensor. When this distance is greater than a preset value, it indicates that the feeding hopper 39 is at the lowest material level. At this time, a material shortage signal is given, and the PLC controls the automatic batching unit above it to batch the tea, causing the dispensing gate 283 to open, and all the tea in the ingredient bins 28 falls into the feeding hopper 39.

[0052] Grinding Unit 30: For ease of design and installation, current electric stone mill drive motors are generally designed below the lower grinding disc. Since grinding matcha produces a significant amount of tea powder, the air will contain a certain concentration of tea powder, which decreases with increasing height. To prevent contamination of the motor and transmission device and reduce the risk of dust mixing and explosion, this invention uses an explosion-proof motor for the main motor and employs a top-mounted design for the motor and transmission device, i.e., the motor and transmission device are installed above the moving grinding disc. This minimizes the concentration of tea powder near the motor and transmission device.

[0053] This invention feeds material from directly above the upper grinding disc 32, with the drive motor 37 fixedly placed on the side. A gear ring 36 allows the tea leaves to pass through the gear ring 36 from the mixing chamber 28 and fall into the funnel. The stone mill matcha machine includes a feeding funnel 39, a funnel fixing frame, a brush 321, an M6 hex bolt assembly, an upper grinding disc 32, a lower grinding disc 31, a discharge port 311, a cooling unit 312, a cooling unit cover 313, and a temperature sensor 314.

[0054] Each of the four electric stone mill units has a 400mm diameter circular hole on its base plate. A drive motor 37 is mounted next to it, and a fixed plate 34 is coaxially mounted in the corresponding position. Both the moving plate 35 and the fixed plate 34 are annular structures with a semi-circular groove milled in the center. Steel ball rolling elements 350 are installed within the groove, forming an assembly. A gear ring is mounted on the upper part of the moving plate, meshing with the drive gear at the shaft of the drive motor 37. The assembly contains a 350mm diameter cylindrical cavity. The top of each assembly has its own material outlet, and the lower part contains a feeding funnel 39, which is mounted on the upper grinding disc 32. The drive gear of the drive motor 37 rotates the gear ring 36 and the moving plate 35. The upper end of the transmission frame 33 is connected to the moving plate 35 with M6 hex bolts, and the lower end is fixed to the upper grinding disc 32 with an M8 hex bolt set. The rotation of the moving plate 35 drives the upper grinding disc 32 to rotate synchronously through the transmission frame 33. The radius of the gear ring 36 is equal to the radius of the feed hopper 39, allowing the tea leaves to pass directly through the gear ring 36 and fall into the hopper. The beneficial effect of this structure is that it solves the technical problem of feeding material from directly above when the main motor is positioned at the top.

[0055] In this embodiment, the upper grinding disc 32 is also provided with two brushes 321. The two brushes 321 are located at both ends of the same diameter on the upper grinding disc 32. Both brushes 321 are inclined at a 30-degree angle to the vertical direction, and the inclination directions of the two brushes 321 are staggered to ensure that the two brushes 321 rotate in the same direction to avoid bristle curling and jamming. A receiving groove for receiving matcha falling from the grinding surface is coaxially arranged on the lower grinding disc 31. The bottom of the receiving groove is connected to a discharge pipe 311 for discharging the material. The bristles of the brushes 321 just contact the bottom of the receiving groove. When the upper grinding disc 32 rotates, the brushes 321 contact and clean the receiving groove, so that the grinding material on the lower grinding disc 31 is conveyed out through the discharge pipe 311.

[0056] The lower grinding disc 32 is a stone mill with a diameter of 360mm. The brush 321 is 90mm wide and moves in a circular motion in the receiving groove of the lower grinding disc 31. The receiving groove is 92mm wide, so that the brush 321 matches the material groove and ensures that the brush 321 effectively cleans the receiving groove.

[0057] In this embodiment, the upper grinding disc 32 and the lower grinding disc 31 have the same grinding surface structure. The grinding grooves 322 adopt a straight-lined structure with the same height and width. A regular octagon at the center of the grinding groove 322 divides the grinding surface into multiple fan-shaped regions with equal central angles. The grinding grooves 322 within the same fan-shaped region are arranged in parallel, and the longest groove at one end of the fan-shaped region has the same radius as the grinding surface. As shown in the figure, the grinding grooves 322 intersect with the edge of the grinding disc, facilitating cleaning of the grinding grooves 322. In this embodiment, each fan-shaped region is rotationally symmetrical, ensuring that the grinding grooves 322 in adjacent regions are not interconnected, which helps improve grinding efficiency. Specifically, in this embodiment, the abrasive surface is divided into eight regions. The longest abrasive groove 322 in each region is equal to the radius of the abrasive surface. The other abrasive grooves 322 are parallel to the longest abrasive groove 322 and their lengths decrease step by step. Each abrasive groove 322 is 6mm high and 6mm wide, and the spacing between each abrasive groove 322 is 6mm. When the stone mill unit is in operation, the upper and lower grinding discs 31 can achieve staggered meshing, which is beneficial for tea powder grinding.

[0058] The drive motor 37 is a 0.5kW variable frequency motor, fixed on the frame. A drive gear 38 is coaxially fixed to the output shaft of the drive motor 37. The normal module and normal pressure angle of the teeth of the drive gear 38 should be equal to those of the gear ring 36. The gear ring 36 is fixed to the positioning rotating disk 35 by M8 hex bolts.

[0059] The cooling unit consists of a semiconductor cooler 312 and a cooling unit housing 313. Current electric graphite matcha and traditional stone-mill matcha technologies do not consider the issue of tea quality degradation due to increased stone mill temperature during processing, and therefore lack automatic temperature control for the stone mill. This design incorporates a cooling component that automatically cools and dissipates heat based on stone mill temperature changes during continuous operation, significantly improving the quality of the finished matcha and increasing production efficiency. The semiconductor cooler selected is model XH-X191, with a fan voltage of DC12V and a fan diameter of 80mm. The low-temperature end of the cooling element of the semiconductor cooler is fixed to the lower grinding disc 31 by thermally conductive silicone. When the temperature of the upper and lower grinding discs 31 is too high during the grinding process, the grinding effect will be poor and the tea quality will be reduced. Therefore, a cooling unit is needed to control the operating temperature of the grinding disc. When the temperature sensor of the lower grinding disc 31 detects that the grinding disc temperature is higher than the upper limit, the PLC controls the conductor cooler to work. The low-temperature end of the cooling element causes the grinding disc temperature to drop. At the same time, the output frequency of the inverter is reduced, which slows down the speed of the main motor and reduces the heat generated by grinding until the grinding disc temperature returns to normal, thus ensuring the quality of tea grinding.

[0060] The receiving unit 40 includes a conveyor belt 41, a negative pressure box, a conveyor motor 43, a roller brush 42, and a brush motor. The conveyor belt 41 is made of food-grade material. The conveyor belt 41 is horizontally mounted on the conveyor frame and is used to collect the ground material output from each stone mill matcha machine and transport it to the next process. Specifically, a rotating shaft is provided on the frame, supporting the conveyor belt 41 and driving it to rotate. The frame also has a large pulley and a small pulley. The conveyor motor 43 is connected to the small pulley and drives it to rotate. The small pulley is connected to the large pulley via a belt drive, and the rotating shaft rotates synchronously with the large pulley, thereby driving the conveyor belt 41 to rotate. The conveyor motor 43 is an asynchronous AC geared motor with a rated power of 0.2kW.

[0061] The roller brush 42 is mounted on the conveyor frame via a roller brush 42 bearing housing. The roller brush 42 is located at the end of the conveyor belt 41. A brush motor is connected to the roller brush 42 and drives the roller brush 42 to rotate, pushing the matcha powder on the conveyor belt 41 into the collection device. The brush motor is an asynchronous AC geared motor with a rated power of 0.2 kW.

[0062] The control method includes the following steps:

[0063] S1. Tea leaves are transported by vertical elevator 11 to transfer hopper 21 where materials need to be added. When the upper limit photoelectric switch 281 in the feeding bin 28 detects that the volume of tea leaves in the feeding bin 28 has reached the upper limit, the vertical elevator 11 stops feeding material into the transfer hopper 21. When the upper limit photoelectric switch 281 in the feeding bin 28 detects that the volume of tea leaves in the feeding bin 28 is insufficient, the tea leaves in the transfer hopper 21 fall into the auger housing 22, and the auger motor 23 works to drive the tea leaves to each drop pipe 25.

[0064] S2. When the amount of tea in any ingredient bin 28 is insufficient, the electric push rod 27 at the discharge pipe 25 opens the discharge baffle 26, allowing the tea to fall into the quantitative ingredient bin 28; when the amount of tea in the ingredient bin 28 reaches the upper limit, the electric push rod 27 opens and the discharge baffle 26 closes, stopping the discharge.

[0065] S3. When the capacity sensor 392 detects that the amount of tea leaves in the feed hopper 39 is insufficient, the dispensing valve 283 at the bottom of the mixing chamber 28 opens as the dispensing electric push rod 284 extends, replenishing the material into the feed hopper 39; when the capacity sensor 392 detects that the amount of tea leaves in the feed hopper 39 has reached the upper limit, the dispensing valve 283 at the bottom of the mixing chamber 28 closes as the dispensing electric push rod 284 shortens, stopping the replenishment of material into the feed hopper 39.

[0066] S4. After the materials are separated, the upper grinding disc 32 and the lower grinding disc 31 are used to grind the tea leaves.

[0067] S5. The tea powder is swept off the conveyor belt 41 by the brush 321. The tea powder on the surface of the conveyor belt 41 moves horizontally with the conveyor belt 41 and is brushed into the collection box by the roller brush 42.

[0068] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent continuous stone-grinding matcha machine unit with automatic feeding, characterized in that, The system includes a feeding unit (10) and a distributing unit (20) arranged at the outlet of the feeding unit (10). Each distributing port of the distributing unit (20) is equipped with a grinding unit (30). The outlet of each grinding unit (30) is connected to a receiving unit (40) to collect matcha powder. The grinding unit (30) includes a frame, on which a lower grinding disc (31) is fixedly installed. An upper grinding disc (32) is coaxially rotatably connected to the upper surface of the lower grinding disc (31). The surfaces of the upper grinding disc (32) and the lower grinding disc (31) that contact each other constitute a grinding surface. An eccentric through-hole is arranged on the upper grinding disc (32), and the inlet end of the through-hole is connected to an inlet funnel (39). The inlet funnel (39) is connected to the inlet funnel (39). 9) Coaxially fixed to the upper surface of the upper grinding disc (32); a drive motor (37) for driving the upper grinding disc (32) to rotate is installed on the side of the upper grinding disc (32); a drive gear (38) is installed on the output shaft of the drive motor (37); a transmission frame (33) is fixedly connected to the upper grinding disc (32); a fixed disc (34) is coaxially installed directly above the upper grinding disc (32); a moving disc (35) is coaxially rotatably installed on the fixed disc (34); both the fixed disc (34) and the moving disc (35) are annular structures, and a groove with a semi-circular cross-section is milled in the middle of the annular structure, and a steel ball rolling element (350) is installed in the groove; a gear ring (36) is coaxially installed on the upper part of the moving disc (35); the gear ring (36) and the drive... The gear (38) is externally meshed; a receiving groove for receiving matcha falling from the grinding surface is coaxially arranged on the lower grinding disc (31), and a feeding pipe (311) for feeding is connected to the bottom of the receiving groove; a brush (321) is symmetrically installed on the upper grinding disc (32), and the brush (321) is arranged in the receiving groove around the axis of the upper grinding disc (32), and the bristles of the brush (321) are in contact with the bottom of the receiving groove; the contact surfaces of the upper grinding disc (32) and the lower grinding disc (31) are both arranged with fan-shaped grinding areas, and the center of each fan-shaped grinding area is located at the intersection of the corresponding regular polygons; the fan-shaped grinding area includes straight grinding grooves (322), and each grinding groove (322) in the same fan-shaped grinding area is The sides of the regular polygon with the center of the fan-shaped grinding area are arranged parallel to each other, and the longest groove has the same radius as the grinding surface. Each grinding groove (322) is arranged outward at equal intervals along the direction perpendicular to the side of the regular polygon, and the length decreases step by step. The fan-shaped grinding areas are spliced ​​together to form the grinding surface. The material distribution unit (20) includes a transfer funnel (21) for receiving materials. The transfer funnel (21) is connected to the auger shell (22). The auger shell (22) is coaxially rotatably connected to the auger guide plate (24). The bottom of the auger shell (22) is provided with a drop pipe (25). The bottom of each drop pipe (25) is connected to a feeding bin (28). The feeding bin (28) is connected to the feeding funnel (39).A slide rail is installed at the outlet of the discharge pipe (25), and a discharge baffle (26) is slidably arranged in the slide rail. A discharge electric push rod (27) is installed between the discharge baffle (26) and the discharge pipe (25). The discharge electric push rod (27) can pull the discharge baffle (26) to move radially along the discharge pipe (25) toward the outlet to make the outlet open and close in a reciprocating linear sliding motion. A material distribution valve (283) is arranged at the outlet of the batching bin (28). A material distribution electric push rod (284) is installed between the material distribution valve (283) and the batching bin (28). The material distribution electric push rod (284) can pull the material distribution valve (283) to move toward the outlet of the batching bin (28) to make the outlet open and close in a reciprocating linear sliding motion. The receiving unit (40) The feeding unit (10) includes a conveyor arranged at the bottom of each discharge pipe (25), the conveyor including a support base, on which a conveyor belt (41) and a conveyor motor (43) for driving the conveyor belt (41) to rotate are arranged; a roller brush (42) for cleaning the material receiving surface of the conveyor belt (41) is also arranged on the support base; the feeding unit (10) includes a vertical elevator (11), and a transfer funnel (21) is arranged on the discharge trajectory of the vertical elevator (11); an upper limit photoelectric switch (281) is arranged at the maximum storage position of the batching bin (28), and a lower limit photoelectric switch (282) is arranged at the minimum storage position of the batching bin (28); a capacity sensor (392) is arranged at the lowest position of the feed funnel (39).

2. A method for controlling an intelligent continuous stone mill matcha machine unit with automatic feeding as described in claim 1, characterized in that, Includes the following steps: S1. The tea leaves are transported by the vertical elevator (11) to the transfer funnel (21) where materials need to be added. When the upper limit photoelectric switch (281) in the mixing bin (28) detects that the volume of tea leaves in the mixing bin (28) has reached the upper limit, the vertical elevator (11) stops feeding material into the transfer funnel (21). When the lower limit photoelectric switch (282) in the mixing bin (28) detects that the volume of tea leaves in the mixing bin (28) is insufficient, the tea leaves in the transfer funnel (21) fall into the auger housing (22), and the auger motor (23) works to drive the tea leaves to each drop pipe (25). S2. When the amount of tea leaves in any ingredient bin (28) is insufficient, the electric push rod (27) at the discharge pipe (25) opens the discharge baffle (26) to allow the tea leaves to fall into the ingredient bin (28); when the amount of tea leaves in the ingredient bin (28) reaches the upper limit, the electric push rod (27) drives the discharge baffle (26) to close and stop the discharge. S3. When the capacity sensor detects that the amount of tea leaves in the feed hopper (39) is insufficient, the material distribution valve (283) at the bottom of the mixing chamber (28) opens as the electric material distribution push rod (284) extends, and material is added to the feed hopper (39); when the capacity sensor detects that the amount of tea leaves in the feed hopper (39) reaches the upper limit, the material distribution valve (283) at the bottom of the mixing chamber (28) closes as the electric material distribution push rod (284) shortens, and material is stopped being added to the feed hopper (39); S4. After the materials are divided, the upper grinding disc (32) and the lower grinding disc (31) begin to grind the tea leaves. S5. The tea powder is swept off the conveyor belt (41) by the brush (321). The tea powder on the surface of the conveyor belt (41) moves horizontally with the conveyor belt (41) and is brushed into the collection box by the roller brush (42).

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