Intelligent continuous stone mill tea grinding machine set and control method

Abstract

The application relates to the technical field of tea processing, in particular to an intelligent continuous stone mill matcha grinding unit and a control method, which comprises a dosing unit and a feeding unit for feeding the dosing unit; a grinding part for grinding matcha is arranged at each discharging end of the dosing unit, and the dosing unit can distribute matcha to each grinding part according to a predetermined control program; a conveying unit for collecting tea powder is arranged at the discharging end of each grinding part; through the cooperation between the specifically designed vertical elevator, the dosing unit, the grinding part and the conveying unit, the dosing, grinding and discharging in the matcha production process can be automatically and continuously carried out, the labor intensity of workers is effectively reduced, the downtime of the grinding part during feeding is reduced, and the production efficiency of matcha is improved.

Description

Technical Field

[0001] This invention relates to the field of tea processing technology, specifically to an intelligent continuous stone mill matcha grinding unit and its control method. Background Technology

[0002] Currently, most stone-ground matcha on the market is produced using single electric stone mills. Each system relies on manual handling and loading / unloading during material feeding and grinding, resulting in low production efficiency, high labor intensity, and an inability to automate material batching, feeding, and discharging. This leads to numerous production gaps, disrupting continuous production.

[0003] Electric stone mills typically place the grinding motor below the grinding disc, using the motor to drive the disc's rotation for grinding matcha. However, during grinding, matcha powder disperses around the motor. The energized motor can easily electrify the surrounding powder, potentially causing an explosion. Even without an explosion, the airborne powder pollutes the production environment, and workers inhaling large amounts of powder can experience adverse health effects.

[0004] In electric stone mills, the grinding process involves the upper and lower grinding discs rotating and rubbing against each other to grind matcha. This grinding process generates significant heat, raising the temperature of the grinding surfaces. Matcha is susceptible to the effects of high grinding temperatures, resulting in a darker color and a deterioration in flavor, severely impacting the quality of the tea powder. Furthermore, the temperature of each grinding section is difficult to adjust individually, and the existing grinding discs have relatively simple grinding patterns, leading to poor grinding quality and difficulty in achieving both coarse and fine grinding. Therefore, solutions are urgently needed. Summary of the Invention

[0005] To avoid and overcome the technical problems existing in the prior art, this invention provides an intelligent continuous stone mill matcha grinding unit and control method. This invention achieves automated and continuous material supply during matcha production through the coordinated operation of a specifically designed vertical elevator, a batching unit, a grinding section, and a conveying unit, effectively reducing the labor intensity of workers; it also reduces downtime of the grinding section during material supply, thus improving matcha production efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A smart continuous stone mill matcha grinding unit includes a batching unit and a feeding unit for feeding materials to the batching unit; each discharge end of the batching unit is equipped with a grinding section for grinding matcha, and the batching unit can distribute matcha to each grinding section according to predetermined conditions; each discharge end of the grinding section is equipped with a conveying unit for collecting tea powder.

[0008] As a further embodiment of the present invention: each grinding part is a first grinding part, a second grinding part, a third grinding part, and a fourth grinding part, all having the same structure;

[0009] The first grinding unit includes a third support frame and a receiving base plate fixedly installed on the top of the third support frame. The upper surface of the receiving base plate is recessed with a cavity, and a lower grinding stone is fixedly installed at the bottom of the cavity. An upper grinding stone is coaxially mounted on the upper surface of the lower grinding stone, and the surfaces of the two grinding stones in contact with each other constitute the grinding surface. A bent passage for guiding matcha to the grinding surface is opened through the upper grinding stone, and the feed port of the bent passage is connected to a feed funnel for material leakage and which rotates synchronously and coaxially with the upper grinding stone. The grinding motor is fixedly installed on a fourth support frame, and the drive end of the grinding motor is connected to the upper grinding stone for transmission to drive the upper grinding stone to rotate.

[0010] As a further embodiment of the present invention: grinding patterns are arranged on the surfaces of the two grinding discs that are in contact with each other, and the grinding patterns include a first part and a second part arranged in sequence along the radial direction outward of the grinding discs;

[0011] The first part includes an arc-shaped coarse grinding groove extending radially outward along the grinding disc, and the depth of the coarse grinding groove gradually becomes shallower from the inside to the outside; each coarse grinding groove is evenly distributed on the corresponding disc surface around the axis of the grinding disc to form a spiral structure.

[0012] The second part includes straight fine grinding grooves that are inclined from the inside to the outside, and the depth of the fine grinding grooves gradually becomes shallower from the inside to the outside; the fine grinding grooves are staggered to form an annular mesh structure, and the annular mesh structure is distributed on the outside of the spiral structure.

[0013] As a further embodiment of the present invention: the grinding motor is coaxially disposed above the feed funnel, a connecting sleeve is coaxially fixed to the outside of the drive shaft of the grinding motor, a connecting rod is coaxially fixed to the bottom end of the connecting sleeve, a first gear is fixed to the bottom end of the connecting rod, a support plate is fixedly connected to the top of the circular dustproof plate by countersunk bolts, the lower end of the connecting rod is rotatably connected to the inside of the center position of the support plate by a bearing, a transmission shaft is rotatably connected to the inside of the front position of the support plate by a bearing, a second gear is fixedly connected to the upper outer wall of the transmission shaft, a third gear is fixedly connected to the lower outer wall of the transmission shaft, the second gear meshes with the first gear, the second gear and the first gear are located on the upper side of the circular dustproof plate, and the third gear meshes with the gear ring of the upper grinding disc coaxially fixed.

[0014] The outer side of the lower grinding stone and the inner wall of the concave cavity form an annular temporary storage cavity for storing tea powder. A discharge hole communicating with the temporary storage cavity and used for material leakage is opened at the corresponding position at the bottom of the concave cavity. A brush that can rotate synchronously with the upper grinding stone is fixed to the outer side of the upper grinding stone. The brush can move circumferentially in the temporary storage cavity to sweep the tea powder into the discharge hole, thereby collecting the tea powder.

[0015] As a further embodiment of the present invention: the feeding unit includes a first feeding unit, a second feeding unit, a third feeding unit and a fourth feeding unit that cooperate with each grinding unit and have the same structure;

[0016] The first grinding unit includes a second support frame supported on the ground. The second support frame has a horizontally extending limiting groove. A vehicle body is slidably connected in the limiting groove. An electromagnetic vibration groove is installed on the vehicle body and is inclined downward. The electromagnetic vibration groove can perform a reciprocating linear sliding motion along the limiting groove, moving closer to or away from the feed inlet of the feed funnel. The second support frame is provided with a first electric push rod that drives the electromagnetic vibration groove to produce the reciprocating linear sliding motion.

[0017] The batching unit also includes a first belt conveyor installed on a first support frame. A second belt conveyor and a third belt conveyor are respectively arranged below the material drop tracks on both sides of the first belt conveyor. The second belt conveyor is arranged above two adjacent sets of electromagnetic vibration troughs, and the two sets of electromagnetic vibration troughs are respectively located below the material drop tracks at the corresponding ends of the second belt conveyor. The third belt conveyor is arranged above two other adjacent sets of electromagnetic vibration troughs, and the two sets of electromagnetic vibration troughs are respectively located below the material drop tracks at the corresponding ends of the third belt conveyor.

[0018] As a further embodiment of the present invention: the feeding unit includes a vertical elevator, and the first belt conveyor is located below the material drop trajectory of the vertical elevator.

[0019] As a further embodiment of the present invention: the conveying unit includes an auger conveying cylinder extending along the arrangement direction of each grinding section, a rotating auger being coaxially rotatably mounted inside the cavity of the auger conveying cylinder, an auger motor being coaxially mounted at the drive end of the auger conveying cylinder, and the auger motor being drively connected to the rotating auger; a discharge funnel is fixedly connected to the upper part of the auger conveying cylinder, the discharge funnel is connected to the cavity of the auger conveying cylinder, and the discharge funnel is located below the corresponding discharge hole; the other end of the auger conveying cylinder constitutes the discharge end.

[0020] As a further embodiment of the present invention: the grinding unit also includes a dustproof unit that cooperates with the grinding unit, the dustproof unit including a first dustproof part, a second dustproof part, a third dustproof part and a fourth dustproof part with identical structures;

[0021] The first dustproof part includes an upper annular placement groove and a lower annular placement groove arranged sequentially from top to bottom. The lower annular placement groove is coaxially fixed to the outside of the receiving base. A support rod is connected between the upper annular placement groove and the lower annular placement groove. An annular dustproof cover is installed between the upper annular placement groove and the lower annular placement groove. A circular dustproof plate is covered on the upper annular placement groove. An ultrasonic distance sensor for detecting the height of broken tea raw materials inside the feeding funnel is fixedly connected to the bottom of the center of the circular dustproof plate by screws.

[0022] The annular dust cover has a feeding port for inserting the front end of the electromagnetic vibration groove. A rectangular limiting slide frame is installed at the corresponding position of the feeding port and is attached to the outer wall of the annular dust cover. An arc-shaped dustproof plate is slidably installed on the limiting slide frame. The arc-shaped dustproof plate can move back and forth linearly along the slide groove opened on the limiting slide frame, thereby opening or closing the feeding port. A second electric push rod is installed on the limiting slide frame to drive the arc-shaped dustproof plate to produce the reciprocating linear sliding motion.

[0023] As a further aspect of the present invention: the grinding unit also includes a cooling unit for dissipating heat from the grinding disc. The cooling unit includes an aluminum mounting cylinder installed in a cavity at the bottom of the lower grinding disc. From top to bottom, a cold end fan, a cold end aluminum fin, a semiconductor cooling chip, a hot end aluminum fin, and a hot end fan are sequentially installed on the bottom of the aluminum mounting cylinder. A semi-cylindrical groove is provided on the top of the lower grinding disc, and a temperature sensor is fixedly connected in the semi-cylindrical groove.

[0024] A control method for an intelligent continuous stone mill matcha grinding unit, the control method comprising the following steps:

[0025] S1: The control module controls the operation of each grinding motor and auger motor; when an ultrasonic distance sensor detects that the amount of broken tea raw material in the corresponding feed hopper is lower than the lower limit, the ultrasonic distance sensor sends a signal to the control module. After receiving the signal from the ultrasonic distance sensor, the control module controls the corresponding grinding motor to stop rotating; the control module controls the corresponding second electric push rod to retract, and the second electric push rod drives the arc-shaped dustproof plate to move downward, thereby opening the corresponding feed port;

[0026] S2: The control module controls the drive motor inside the first belt conveyor to rotate forward / reverse and transport the broken tea material on its conveyor belt to the conveyor belt of the second belt conveyor or the third belt conveyor; the control module then controls the drive motor inside the second belt conveyor to rotate forward / reverse and the drive motor inside the third belt conveyor to transport the broken tea material on its conveyor belt to the corresponding electromagnetic vibration trough.

[0027] S3: The control module controls the corresponding first electric push rod to extend, so that the end of the electromagnetic vibration groove extends to the upper side of the corresponding feeding funnel. At this time, the control module can control the electromagnetic vibration groove to work, and the electromagnetic vibration groove shakes the broken tea raw material into the corresponding feeding funnel.

[0028] S4: When the corresponding ultrasonic distance sensor detects that the amount of broken tea raw material in the corresponding feed hopper is higher than the upper limit, the control module controls the vertical elevator, the first belt conveyor, the second belt conveyor or the third belt conveyor, and the corresponding electromagnetic vibration trough to stop working.

[0029] S5: The control module then controls the corresponding first electric push rod to retract, so that the end of the electromagnetic vibration groove exits from the corresponding annular dust cover. The control module then controls the corresponding second electric push rod to extend, so that the corresponding feed port is closed. Finally, the control module controls the corresponding grinding motor to operate.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. In this invention, multiple grinding units operate simultaneously. The batching unit promptly distributes and replenishes incoming broken tea leaves to each grinding unit. Traditional stone mills are used to grind the tea leaves, ensuring the taste and quality of the tea powder. Brushes are provided to easily sweep the tea powder adhering to the upper and lower grinding discs into the receiving tray. A specially designed conveying unit prevents the ground tea powder from dispersing during conveying, which helps improve the air quality in the production workshop. The batching unit, grinding unit, and conveying unit are controlled by a specific program to achieve intelligent automatic batching, feeding, grinding, and discharging, ensuring that each grinding unit can work continuously. Compared with manual feeding, this greatly reduces downtime, thereby improving the production efficiency of matcha.

[0032] 2. The feeding unit in this invention is telescopic. When feeding material into the feeding funnel, the inclined end of the electromagnetic vibration groove can extend to the top of the feeding funnel. When feeding material into the feeding funnel is not required, the inclined end of the electromagnetic vibration groove can move away from the top of the feeding funnel. This not only enables smooth feeding into the feeding funnel, but also avoids the inclined groove of the electromagnetic vibration groove affecting the normal operation of the grinding unit after feeding is completed.

[0033] 3. In this invention, the grinding motor is specifically positioned directly above the grinding disc. Due to gravity, the dispersed tea powder is more likely to fall below the grinding disc. Therefore, positioning the grinding motor far above the grinding disc can reduce the amount of dispersed tea powder entering the grinding motor, which helps to eliminate the safety hazard of dust explosion.

[0034] 4. The ultrasonic distance sensor in this invention can detect the amount of broken tea raw material in the feeding hopper in real time, which makes it convenient for the feeding unit to add broken tea raw material to the feeding hopper in a timely manner without causing the broken tea raw material in the feeding hopper to overflow due to excessive feeding, thus ensuring that there is enough broken tea raw material in each feeding hopper.

[0035] 5. The grinding motor in this invention mainly drives the upper grinding disc to rotate through gear transmission. The overall structure is compact. The smooth transmission of gear transmission ensures the stability of the upper grinding disc during operation, which also helps to reduce the wear of the rotating connection of the upper grinding disc. At the same time, it can play a role in deceleration, which helps the grinding motor to provide greater torque when operating at low speed.

[0036] 6. The grinding grooves in this invention can greatly improve the quality of tea powder. The coarse grinding grooves on the inner side of the grinding grooves are used for coarse grinding, while the fine grinding grooves on the outer side of the grinding grooves are used for fine grinding, which helps to make the tea powder finer. By setting notches, it is easier for broken tea raw materials in the bending passage to flow to the grinding grooves, thereby improving grinding efficiency.

[0037] 7. The cooling unit in this invention can effectively cool the grinding position of the grinding disc. It uses a cooling method to cool the grinding position by cooling the inner cavity at the bottom of the grinding disc, which is beneficial to improving the quality of tea powder. When the temperature sensor detects that the temperature at the corresponding grinding pattern of the lower grinding disc is higher than the preset value, the control module can reduce the speed of the corresponding grinding motor through the frequency converter to alleviate the problem of heat generation during grinding, which is beneficial to ensuring the quality of tea powder. When the temperature sensor detects that the temperature at the corresponding grinding pattern of the lower grinding disc is lower than the preset value, the control module can increase the speed of the corresponding grinding motor through the frequency converter. The temperature of each grinding part can be adjusted separately, which is beneficial to improving grinding efficiency while ensuring the quality of tea powder.

[0038] 8. The dustproof unit in this invention can effectively reduce the dispersion of tea powder after grinding, which is beneficial to improving the air quality in the production workshop and eliminating the safety hazard of dust explosion. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0040] Figure 2 This is a bottom view of the overall structure of the invention;

[0041] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0042] Figure 4 This is a schematic diagram of the cooperative structure of the grinding unit, dustproof unit, and conveying unit of the present invention;

[0043] Figure 5 This is a schematic diagram of the structure of the first feeding unit when it does not feed material to the first grinding unit.

[0044] Figure 6 This is a schematic diagram of the structure of the first feeding unit feeding material to the first grinding unit according to the present invention;

[0045] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0046] Figure 8 This is an exploded structural diagram of the first grinding part of the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of the grinding disc of the present invention;

[0048] Figure 10 This is a cross-sectional view of the grinding disc of the present invention;

[0049] Figure 11 This is a schematic diagram of the cooperation structure between the grinding disc and the cooling unit of the present invention;

[0050] Figure 12 This is a schematic diagram of the overall structure of the cooling unit of the present invention;

[0051] Figure 13 This is a schematic diagram of the connection structure of the semiconductor cooling chip of the present invention;

[0052] Figure 14 This is a schematic diagram of the overall structure of the first dustproof part of the present invention;

[0053] Figure 15 This is a schematic diagram of the overall structure of the conveying unit of the present invention.

[0054] In the picture:

[0055] 1. Vertical elevator;

[0056] 2. Batching unit; 21. First support frame; 22. First belt conveyor; 23. Second belt conveyor; 24. Third belt conveyor; 25. First feeding section; 2501. Second support frame; 2502. Limiting groove; 2503. Axle; 2504. Car body; 2505. Roller; 2506. Electromagnetic vibration groove; 2507. First electric push rod; 26. Second feeding section; 27. Third feeding section; 28. Fourth feeding section;

[0057] 3. Grinding unit; 31. First grinding section; 3101. Third support frame; 3102. First retaining post; 3103. Material receiving base; 3104. Second retaining post; 3105. Lower grinding disc; 3106. Central shaft; 3107. Upper grinding disc; 3108. Feed funnel; 3109. Gear ring; 3110. Grinding motor; 3111. Connecting sleeve; 3112. Connecting rod; 3113. First gear; 3114. Support plate; 3115. Drive shaft; 3116. Second gear; 3117. Third gear; 3118. Limiting support frame; 3119. Brush; 3120. Discharge hole; 3121. Grinding texture; 3122. Bending passage; 3123. Notch; 3124. Ultrasonic distance sensor; 32. Second grinding section; 33. Third grinding section; 34. Fourth grinding section; 35. Fourth support frame;

[0058] 4. Cooling unit; 41. Aluminum mounting cylinder; 42. Cold end aluminum fins; 43. Hot end aluminum fins; 44. Semiconductor cooling chip; 45. Cold end fan; 46. Hot end fan; 47. Temperature sensor;

[0059] 5. Dustproof unit; 51. First dustproof section; 52. Second dustproof section; 53. Third dustproof section; 54. Fourth dustproof section; 5101. Upper annular placement groove; 5102. Lower annular placement groove; 5103. Support rod; 5104. Limiting slide frame; 5105. Proximity sensor; 5106. Annular dustproof cover; 5107. Circular dustproof plate; 5108. Feed port; 5109. Second electric push rod; 5110. Arc-shaped placement groove; 5111. Arc-shaped dustproof plate;

[0060] 6. Conveying unit; 61. Screw conveyor cylinder; 62. Bottom support; 63. Rotating screw; 64. Screw motor; 65. Discharge hopper; 66. Sealing rubber gasket; 67. Output port. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0062] Reference Figure 1 , Figure 2 , Figure 4 The present invention provides an intelligent continuous stone mill matcha grinding unit, comprising a feeding unit, a batching unit 2, a grinding unit 3, a cooling unit 4, a dust prevention unit 5, and a conveying unit 6.

[0063] Reference Figure 1 , Figure 2 The feeding unit includes a vertical elevator 1. The batching unit 2 includes a first support frame 21, a first belt conveyor 22, a second belt conveyor 23, a third belt conveyor 24, a first feeding section 25, a second feeding section 26, a third feeding section 27, and a fourth feeding section 28.

[0064] The first belt conveyor 22, the second belt conveyor 23, and the third belt conveyor 24 are all fixedly connected to the top of the first support frame 21. The vertical elevator 1 is driven by an asynchronous AC geared motor with a rated power of 0.4 kW, and the material conveying end of the vertical elevator 1 is located directly above the first belt conveyor 22. The first belt conveyor 22 is driven by an asynchronous AC geared motor with a rated power of 0.3 kW, and is located above the second belt conveyor 23 and the third belt conveyor 24. The left and right material conveying ends of the first belt conveyor 22 are located directly above the second belt conveyor 23 and the third belt conveyor 24, respectively. The second belt conveyor 23 is located to the lower left of the first belt conveyor 22, and the third belt conveyor 24 is located to the lower right of the first belt conveyor 22. Both the second belt conveyor 23 and the third belt conveyor 24 are driven by asynchronous AC geared motors with a rated power of 0.2 kW.

[0065] Reference Figure 5 , Figure 6 , Figure 7 The first feeding unit 25 includes a second support frame 2501, a limiting groove 2502, an axle 2503, a car body 2504, rollers 2505, an electromagnetic vibration groove 2506, and a first electric push rod 2507. The second feeding unit 26, the third feeding unit 27, and the fourth feeding unit 28 have the same overall structure as the first feeding unit 25, and will not be described in detail here.

[0066] A limiting groove 2502 is located at the top of the second support frame 2501. An axle 2503 is fixedly connected to the bottom of the vehicle body 2504. A roller 2505 is rotatably connected to the axle 2503 via a bearing, and the roller 2505 is in rolling contact with the bottom wall of the inner cavity of the limiting groove 2502. An electromagnetic vibration groove 2506 is fixedly connected to the top of the vehicle body 2504. The electromagnetic vibration groove 2506 is a GZV3 model, and its open inclined groove is custom-made. A first electric push rod 2507 is fixedly connected to the end of the second support frame 2501 away from the limiting groove 2502. The first electric push rod 2507 is a DC electric push rod with a stroke of 250mm. The first electric push rod 2507 has a built-in limit switch, and its telescopic end is fixedly connected to the side wall of the vehicle body 2504.

[0067] Reference Figure 1 , Figure 2 , Figure 3, Figure 4 The grinding unit 3 includes a first grinding part 31, a second grinding part 32, a third grinding part 33, a fourth grinding part 34, and a fourth support frame 35.

[0068] Reference Figure 3 , Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 10 The first grinding section 31 includes a third support frame 3101, a first retaining post 3102, a receiving base 3103, a second retaining post 3104, a lower grinding disc 3105, a central shaft 3106, an upper grinding disc 3107, a feeding funnel 3108, a gear ring 3109, a grinding motor 3110, a connecting sleeve 3111, a connecting rod 3112, a first gear 3113, a support plate 3114, a transmission shaft 3115, a second gear 3116, a third gear 3117, a limiting support frame 3118, a brush 3119, a discharge hole 3120, grinding patterns 3121, a bending passage 3122, a notch 3123, and an ultrasonic distance sensor 3124. The second grinding section 32, the third grinding section 33, and the fourth grinding section 34 have the same overall structure as the first grinding section 31, and will not be described in detail here.

[0069] The top of the third support frame 3101 is fixedly connected to a first locking post 3102. The bottom of the receiving base 3103 has a locking hole that engages with the first locking post 3102. The receiving base 3103 is secured to the top of the third support frame 3101 via the first locking post 3102. The diameter of the receiving base 3103 is 540mm. The top of the receiving base 3103 is fixedly connected to a second locking post 3104. The bottom of the lower grinding disc 3105 has a locking hole that engages with the second locking post 3104. The lower grinding disc 3105 is secured to the top of the receiving base 3103 via the second locking post 3104. The top of the lower grinding disc 3105 is fixedly connected to a central shaft 3106. The upper grinding disc 3107 is rotatably connected to the top of the lower grinding disc 3105 via the central shaft 3106. The diameters of both the lower grinding disc 3105 and the upper grinding disc 3107 are 360mm. A feed funnel 3108 is provided on the top of the upper grinding disc 3107. The vertical height of the upper part of the feed funnel 3108 is 60mm, and the cone angle is 60°. A gear ring 3109 is provided on the top of the upper grinding disc 3107. A pin hole is provided at the top of the upper grinding disc 3107. A limit pin is glued to the inside of the pin hole with epoxy resin. The upper end of the limit pin is provided with external thread and a limit nut is screwed on. The limit pin passes through the limit hole of the gear ring 3109. The gear ring 3109 is fixed to the top of the upper grinding disc 3107 by the limit pin and the limit nut. The top of the fourth support frame 35 is fixedly connected to the grinding motor 3110 by bolts. Grinding motor 3110 is positioned directly above the upper grinding disc 3107. The grinding motor 3110 is a 0.5kW variable frequency reduction motor. The speed of the upper grinding disc 3107 is adjusted to 40-60 r / min via frequency conversion to ensure tea powder quality and grinding efficiency. A connecting sleeve 3111 is fixedly connected to the outer wall of the main shaft of the grinding motor 3110. A connecting rod 3112 is fixedly connected to the lower end of the connecting sleeve 3111. A first gear 3113 is fixedly connected to the outer wall of the connecting rod 3112. A support plate 3114 is fixedly connected to the top of the circular dustproof plate 5107 via countersunk bolts. The lower end of the connecting rod 3112 is rotatably connected to the interior of the center position of the support plate 3114 via a bearing. A drive shaft 3115 is rotatably connected to the interior of the front position of the support plate 3114 via a bearing. A second gear 3116 is fixedly connected to the upper outer wall of the drive shaft 3115, and a third gear 3117 is fixedly connected to the lower outer wall of the drive shaft 3115. The second gear 3116 meshes with the first gear 3113, and the two gears are located on the upper side of the circular dustproof plate 5107. The transmission ratio between the first gear 3113 and the second gear 3116 is 2:1. The third gear 3117 meshes with the gear ring 3109, and the transmission ratio between the third gear 3117 and the gear ring 3109 is 3:1. A limit support frame 3118 is fixedly connected to the side wall of the support rod 5103 opposite to the feed port 5108.The lower end of the drive shaft 3115 is rotatably connected to the inside of the limiting support frame 3118 via a bearing. The third gear 3117 and the gear ring 3109 are made of POM (polyoxymethylene) plastic. A brush 3119 is fixedly connected to the peripheral wall of the upper grinding disc 3107. The shafts of the receiving base 3103, the lower grinding disc 3105, the upper grinding disc 3107, and the main shaft of the grinding motor 3110 coincide. The bottom of the upper grinding stone 3107 has a discharge hole 3120. Grinding grooves 3121 are formed on the top of the lower grinding stone 3105 and the bottom of the upper grinding stone 3107. The grinding grooves 3121 consist of inner and outer parts. The inner part of the grinding grooves 3121 consists of annularly distributed coarse grinding grooves with a radius of curvature of 200mm and a groove width of 5mm. The groove depth gradually decreases from 5mm on the inner side to 3mm on the outer side. The coarse grinding grooves are used for coarse grinding of broken tea raw materials. The outer part of the grinding grooves 3121 consists of annularly distributed and intersecting straight fine grinding grooves with a groove width of 3mm. The groove depth gradually decreases from 3mm on the inner side to the outer side. The fine grinding grooves are used for fine grinding of broken tea raw materials. A bent passage 3122 is formed inside the upper grinding stone 3107. The bent passage 3122 has an S-shaped structure, and its upper end is located on the upper grinding stone. At the center of 3107, the lower end of the feed funnel 3108 is located inside the upper end of the bent passage 3122. The lower end of the bent passage 3122 is located beside the central axis 3106. The lower end of the bent passage 3122 has a semi-conical notch 3123 communicating with it. The bottom edge of the notch 3123 is 40mm, and the cone angle is 50°. The notch 3123 facilitates the smoother flow of broken tea leaves towards the grinding grooves 3121.

[0070] An ultrasonic distance sensor 3124 is fixedly connected to the bottom of the center of the circular dustproof plate 5107 by screws. The ultrasonic distance sensor 3124 is an HC series ultrasonic sensor with a detection range of 0.1m-2m and a direction angle of 10°±2°. The upper limit of the distance between the ultrasonic distance sensor 3124 and the surface of the broken tea material in the feeding funnel 3108 is set at 120mm. The height of the upper limit is about 20mm-30mm away from the upper edge of the feeding funnel 3108. The lower limit of the distance between the ultrasonic distance sensor 3124 and the surface of the broken tea material in the feeding funnel 3108 is set at 300mm. The height of the lower limit is about 20mm-30mm away from the lower edge of the feeding funnel 3108.

[0071] Reference Figure 11 , Figure 12 , Figure 13The cooling unit 4 includes an aluminum mounting cylinder 41, a cold-end aluminum fin 42, a hot-end aluminum fin 43, a semiconductor cooling chip 44, a cold-end fan 45, a hot-end fan 46, and a temperature sensor 47.

[0072] A cold-end aluminum fin 42 and a hot-end aluminum fin 43 are fixedly connected to the upper and lower ends of the bottom wall of the aluminum mounting cylinder 41, respectively. A semiconductor cooling chip 44 is disposed between the cold-end aluminum fin 42 and the hot-end aluminum fin 43. The semiconductor cooling chip 44 is model XH-C2406, with a voltage of 24V, a current of 6A, a power of 144W, a temperature difference of 75℃, and external dimensions of 40mm*40mm*3.6mm. The surface of the thermoelectric cooler 44 is coated with thermal grease. A cold-end fan 45 is fixedly connected to the end of the cold-end aluminum fin 42 away from the thermoelectric cooler 44. The cold-end fan 45 is a 13W axial fan with dimensions of 80mm*80mm*30mm. A hot-end fan 46 is fixedly connected to the end of the hot-end aluminum fin 43 away from the thermoelectric cooler 44. The hot-end fan 46 is a 23W axial fan with dimensions of 120mm*120mm*50mm. A semi-cylindrical groove is provided on the top of the lower grinding disc 3105. A temperature sensor 47 is fixedly connected in the semi-cylindrical groove. The temperature sensor 47 is a needle-type temperature sensor. The needle-type contact of the temperature sensor 47 is horizontal. The upper surface of the temperature sensor 47 is lower than the raised texture of the grinding pattern 3121 to avoid damage to the temperature sensor 47 by the grinding pattern 3121. The wire harness of the temperature sensor 47 is fixedly connected to the side wall of the lower grinding disc 3105.

[0073] The lower grinding disc 3105 has a hollow structure with an open bottom. The aluminum mounting cylinder 41 is placed in the hollow bottom of the lower grinding disc 3105, and the aluminum mounting cylinder 41 is connected to the hollow bottom of the lower grinding disc 3105. The bottom of the receiving base 3103 has a circular through groove to facilitate heat dissipation by the hot-end fan 46. The diameter of the circular through groove is smaller than the diameter of the aluminum mounting cylinder 41. The middle of the bottom wall of the aluminum mounting cylinder 41 has a square through groove for placing the semiconductor cooling chip 44. The upper end of the aluminum mounting cylinder 41 has an open structure.

[0074] When the thermoelectric cooler 44 operates, heat is transferred from one side to the other, creating a temperature difference and forming hot and cold ends, thus lowering the temperature near the cold end. The cold-end fan 45 blows cool air from near the cold end into the aluminum mounting cylinder 41, thereby lowering the temperature of the lower grinding disc 3105 and helping to alleviate the heat generation problem of the lower grinding disc 3105 during grinding. The hot-end fan 46 promptly blows the heat from near the hot end outward to ensure the normal operation of the thermoelectric cooler 44. When the temperature sensor 47 detects that the temperature at the corresponding grinding groove 3121 of the lower grinding disc 3105 is higher than a preset value, the control module can reduce the speed of the corresponding grinding motor 3110 through the frequency converter to alleviate the heat generation problem during grinding.

[0075] Reference Figure 5 , Figure 6 , Figure 14 The dustproof unit 5 includes a first dustproof part 51, a second dustproof part 52, a third dustproof part 53 and a fourth dustproof part 54;

[0076] The first dustproof section 51 includes an upper annular placement groove 5101, a lower annular placement groove 5102, a support rod 5103, a limiting slide frame 5104, a proximity sensor 5105, an annular dustproof cover 5106, a circular dustproof plate 5107, a feeding port 5108, a second electric push rod 5109, an arc-shaped placement groove 5110, and an arc-shaped dustproof plate 5111. The second dustproof section 52, the third dustproof section 53, and the fourth dustproof section 54 have the same overall structure as the first dustproof section 51, and will not be described in detail here.

[0077] The lower annular placement groove 5101 is sleeved on the outside of the receiving base 3103. Support rods 5103 and limiting slide frames 5104 are fixedly connected to the outer peripheral sidewalls of the lower annular placement groove 5101 and the upper annular placement groove 5102, respectively. The upper and lower ends of the support rod 5103 are fixedly connected to the upper annular placement groove 5102 and the lower annular placement groove 5101, respectively. The upper and lower ends of the limiting slide frame 5104 are fixedly connected to the upper annular placement groove 5101 and the lower annular placement groove 5102, respectively. A space is provided between the lower annular placement groove 5101 and the upper annular placement groove 5102. There is an annular dust cover 5106, which is made of rigid PVC plastic sheet. The annular dust cover 5106 has a through groove on its peripheral side wall to accommodate the limiting support frame 3118. A circular dust cover 5107 is fixedly connected to the top of the upper annular placement groove 5102. The circular dust cover 5107 is made of rigid PVC plastic sheet. The circular dust cover 5107 has a hole to accommodate the ultrasonic distance sensor 3124 wire harness. The circular dust cover 5107 has a through hole to accommodate the drive shaft 3115 at the position corresponding to the drive shaft 3115.

[0078] A feeding port 5108 is provided on the side of the annular dust cover 5106 facing the electromagnetic vibration groove 2506. A limiting slide frame 5104 is set outside the feeding port 5108. The inclined groove of the electromagnetic vibration groove 2506 can move freely horizontally within the feeding port 5108. A second electric push rod 5109 is fixedly connected to the lower end of the limiting slide frame 5104. The second electric push rod 5109 is a DC electric push rod with a stroke of 250mm. The second electric push rod 5109 has a built-in limit switch. An arc-shaped placement groove 5110 is fixedly connected to the telescopic end of the second electric push rod 5109. An arc-shaped dustproof plate 5111 is fixedly connected inside the arc-shaped placement groove 5110. The arc-shaped dustproof plate 5111 is made of rigid PVC plastic sheet. The arc-shaped dustproof plate 5111 can move up and down along the limiting slide frame 5104 under the drive of the second electric push rod 5109.

[0079] Reference Figure 1 , Figure 2 , Figure 15 The conveying unit 6 includes an auger conveyor cylinder 61, a bottom support 62, a rotating auger 63, an auger motor 64, a discharge hopper 65, a sealing rubber gasket 66, and an output port 67.

[0080] A bottom support 62 is fixedly connected to the bottom of the auger conveyor cylinder 61, and a rotating auger 63 is installed inside the auger conveyor cylinder 61. An auger motor 64, a 0.4kW variable frequency geared motor, is fixedly connected to the right side wall of the auger conveyor cylinder 61 via a connecting flange. The left end of the rotating auger 63 is rotatably connected to the auger conveyor cylinder 61 via a bearing, and the right end of the rotating auger 63 is fixedly connected to the main shaft of the auger motor 64 via a coupling. A discharge hopper 65 is fixedly connected to the top of the auger conveyor cylinder 61, and the lower end of the discharge hopper 65 communicates with the inner cavity of the auger conveyor cylinder 61. A sealing rubber gasket 66 is adhered to the top of the discharge hopper 65 to seal the gap between the material base 3103 and the discharge hopper 65. The inner diameter of the upper end of the discharge hopper 65 is 90mm, and the cone angle of the discharge hopper 65 is 75°. During installation, the axis of the discharge hopper 65 coincides with the axis of the discharge hole 3120, and the bottom of the left end of the auger conveyor cylinder 61 is provided with an output port 67.

[0081] The intelligent continuous stone mill matcha grinding unit control method proposed in this embodiment is as follows:

[0082] In the first step, the control module controls the vertical elevator 1 to work. The vertical elevator 1 lifts the broken tea raw material and conveys it onto the belt of the first belt conveyor 22. The control module controls the retraction of the second electric push rods 5109 included in the first dustproof section 51, the second dustproof section 52, the third dustproof section 53, and the fourth dustproof section 54. The second electric push rods 5109 drive the arc-shaped dustproof plate 5111 to move downward, so that the upper edge of the arc-shaped dustproof plate 5111 is lower than the lower edge of the feed port 5108, thereby opening each feed port 5108. At the same time, the control module controls the auger motor 64 included in the conveying unit 6, the semiconductor cooling chip 44 included in each cooling unit 4, the cold end fan 45, the hot end fan 46, and the temperature sensor 47 to start working.

[0083] In the second step, the control module controls the drive motor inside the first belt conveyor 22 to rotate forward, conveying the broken tea raw material on its conveyor belt to the conveyor belt of the second belt conveyor 23. The control module then controls the drive motor inside the second belt conveyor 23 to rotate forward, conveying the broken tea raw material on its conveyor belt to the inclined groove of the electromagnetic vibration groove 2506 included in the fourth feeding section 28. The control module controls the first electric push rod 2507 included in the fourth feeding section 28 to extend. The extension end of the first electric push rod 2507 drives the vehicle body 2504 to move towards the side closer to the fourth grinding section 34, so that the inclined groove end of the electromagnetic vibration groove 2506 included in the fourth feeding section 28 extends into the feed funnel 3108 included in the fourth grinding section 34. On the upper side, the control module can then control the electromagnetic vibration groove 2506 included in the fourth feeding section 28 to work. The electromagnetic vibration groove 2506 shakes the broken tea raw material into the feeding funnel 3108 included in the fourth grinding section 34. When the ultrasonic distance sensor 3124 included in the fourth grinding section 34 detects that the amount of broken tea raw material in the feeding funnel 3108 included in the fourth grinding section 34 is higher than the upper limit, it is necessary to stop adding broken tea raw material into the feeding funnel 3108 included in the fourth grinding section 34. At this time, the control module controls the vertical elevator 1, the first belt conveyor 22, the second belt conveyor 23, and the electromagnetic vibration groove 2506 included in the fourth feeding section 28 to stop working. The control module then controls the first belt conveyor 22 included in the fourth feeding section 28 to stop working. The electric push rod 2507 retracts, and the telescopic end of the first electric push rod 2507 drives the vehicle body 2504 back to its initial position. The inclined end of the electromagnetic vibration groove 2506 included in the fourth feeding section 28 exits from the inside of the annular dust cover 5106 included in the fourth dustproof section 54. Subsequently, the control module controls the second electric push rod 5109 included in the fourth dustproof section 54 to extend. The telescopic end of the second electric push rod 5109 drives the arc-shaped placement groove 5110 to move upward, so that the arc-shaped dustproof plate 5111 moves upward along the limiting slide frame 5104 and covers the outside of the feeding port 5108, thereby closing the feeding port 5108 included in the fourth dustproof section 54. The control module controls the grinding motor 3110 included in the fourth grinding section 34 to work. The grinding motor 3110 drives the connecting rod 3112 to rotate through the connecting sleeve 3111. The first gear 3113 on the connecting rod 3112 further meshes with the second gear 316. The transmission shaft 3115, which is fixedly connected to the second gear 3116, further drives the third gear 3117 to rotate. The third gear 3117 meshes with the transmission gear ring 3109, thereby causing the upper grinding disc 3107 to rotate around the central shaft 3106. The broken tea raw material in the feed funnel 3108 of the fourth grinding part 34 flows into the grinding groove 3121 through the bending passage 3122 and the notch 3123. The broken tea raw material is ground into powder by the grinding groove 3121. The tea powder enters the inner cavity of the auger conveyor cylinder 61 through the discharge hole 3120 and the discharge funnel 65.

[0084] Thirdly, the control module reverses the drive motor inside the second belt conveyor 23 to transport the broken tea raw materials on its conveyor belt to the inclined groove of the electromagnetic vibration trough 2506 included in the third feeding section 27. The control module controls the first electric push rod 2507 included in the third feeding section 27 to extend. The extension end of the first electric push rod 2507 drives the vehicle body 2504 to move towards the side closer to the third grinding section 33, so that the inclined groove end of the electromagnetic vibration trough 2506 extends into the feed funnel 31 included in the third grinding section 33. On the upper side of 08, the control module can then control the electromagnetic vibration groove 2506 included in the third feeding section 27 to operate. The electromagnetic vibration groove 2506 shakes the broken tea raw material into the feeding funnel 3108 included in the third grinding section 33. When the ultrasonic distance sensor 3124 included in the third grinding section 33 detects that the amount of broken tea raw material in the feeding funnel 3108 included in the third grinding section 33 is higher than the upper limit, it is necessary to stop adding broken tea raw material into the feeding funnel 3108 included in the third grinding section 33. At this time, the control module controls... The electromagnetic vibration trough 2506 included in the vertical elevator 1, the first belt conveyor 22, the second belt conveyor 23, and the third feeding unit 27 stops working. The control module then controls the first electric push rod 2507 included in the third feeding unit 27 to retract. The telescopic end of the first electric push rod 2507 drives the vehicle body 2504 back to its initial position. The inclined end of the electromagnetic vibration trough 2506 included in the third feeding unit 27 exits from inside the annular dust cover 5106 included in the third dust cover 53. Subsequently, the control module controls the third dust cover... The second electric push rod 5109 included in part 53 extends, and the telescopic end of the second electric push rod 5109 drives the arc-shaped placement groove 5110 to move upward, so that the arc-shaped dustproof plate 5111 moves upward along the limiting slide frame 5104 and covers the outside of the feed port 5108, thereby closing the feed port 5108 included in the third dustproof part 53; the control module controls the grinding motor 3110 included in the third grinding part 33 to perform grinding operations, and the tea powder enters the inner cavity of the auger conveyor cylinder 61 through the discharge hole 3120 and the discharge funnel 65.

[0085] Fourthly, the control module controls the drive motor inside the first belt conveyor 22 to reverse and transport the broken tea raw material on its conveyor belt to the conveyor belt of the third belt conveyor 24. The control module controls the drive motor inside the third belt conveyor 24 to rotate forward and transport the broken tea raw material on its conveyor belt to the inclined groove of the electromagnetic vibration groove 2506 included in the second feeding section 26. The control module controls the first electric push rod 2507 included in the second feeding section 26 to extend. The extension end of the first electric push rod 2507 drives the vehicle body 2504 to move closer to the second grinding section. The electromagnetic vibrating groove 2506 moves to one side, causing its inclined end to extend above the feed funnel 3108 included in the second grinding section 32. At this time, the control module can control the electromagnetic vibrating groove 2506 included in the second feeding section 26 to work. The electromagnetic vibrating groove 2506 shakes the broken tea raw material into the feed funnel 3108 included in the second grinding section 32. When the ultrasonic distance sensor 3124 included in the second grinding section 32 detects that the amount of broken tea raw material in the feed funnel 3108 included in the second grinding section 32 is higher than the upper limit, it is necessary to stop feeding the second grinding section 32. Tea leaves are added to the feed hopper 3108, and the control module then stops the vertical elevator 1, the first belt conveyor 22, the third belt conveyor 24, and the electromagnetic vibration trough 2506 included in the second feeding section 26. The control module then controls the first electric push rod 2507 included in the second feeding section 26 to retract. The telescopic end of the first electric push rod 2507 drives the vehicle body 2504 back to its initial position, and the inclined end of the electromagnetic vibration trough 2506 included in the second feeding section 26 retracts from inside the annular dust cover 5106 included in the second dustproof section 52. Then, the control module controls the extension of the second electric push rod 5109 included in the second dustproof part 52. The extension end of the second electric push rod 5109 drives the arc-shaped placement groove 5110 to move upward, so that the arc-shaped dustproof plate 5111 moves upward along the limiting slide frame 5104 and covers the outside of the feed port 5108, thereby closing the feed port 5108 included in the second dustproof part 52. The control module controls the grinding motor 3110 included in the second grinding part 32 to perform grinding operations. The tea powder enters the inner cavity of the auger conveyor cylinder 61 through the discharge hole 3120 and the discharge funnel 65.

[0086] Fifth, the control module reverses the drive motor inside the third belt conveyor 24 to transport the broken tea raw material on its conveyor belt into the inclined groove of the electromagnetic vibration trough 2506 included in the first feeding section 25. The control module controls the first electric push rod 2507 included in the first feeding section 25 to extend. The extension end of the first electric push rod 2507 drives the vehicle body 2504 to move towards the side closer to the first grinding section 31, so that the inclined end of the electromagnetic vibration trough 2506 extends into the feed funnel 3 included in the first grinding section 31. On the upper side of 108, the control module can then control the electromagnetic vibration groove 2506 included in the first feeding section 25 to operate. The electromagnetic vibration groove 2506 shakes the broken tea raw material into the feeding funnel 3108 included in the first grinding section 31. When the ultrasonic distance sensor 3124 included in the first grinding section 31 detects that the amount of broken tea raw material in the feeding funnel 3108 of the first grinding section 31 is higher than the upper limit, it is necessary to stop adding broken tea raw material into the feeding funnel 3108 of the first grinding section 31. At this time, the control module controls the vertical The electromagnetic vibration trough 2506 included in the elevator 1, the first belt conveyor 22, the third belt conveyor 24, and the first feeding unit 25 stops working. The control module then controls the first electric push rod 2507 included in the first feeding unit 25 to retract. The telescopic end of the first electric push rod 2507 drives the car body 2504 back to its initial position. The inclined end of the electromagnetic vibration trough 2506 included in the first feeding unit 25 exits from the inside of the annular dust cover 5106 included in the first dustproof unit 51. Subsequently, the control module controls the first dustproof unit 51 to... The second electric push rod 5109 of the first dustproof part 51 extends, and the telescopic end of the second electric push rod 5109 drives the arc-shaped placement groove 5110 to move upward, so that the arc-shaped dustproof plate 5111 moves upward along the limiting slide frame 5104 and covers the outside of the feed port 5108, thereby closing the feed port 5108 of the first dustproof part 51; the control module controls the grinding motor 3110 of the first grinding part 31 to perform grinding operations, and the tea powder enters the inner cavity of the screw conveyor cylinder 61 through the discharge hole 3120 and the discharge funnel 65.

[0087] Step 6: When the ultrasonic distance sensor 3124 included in the fourth grinding section 34 detects that the amount of broken tea raw material in the feed funnel 3108 included in the fourth grinding section 34 is lower than the lower limit, the ultrasonic distance sensor 3124 sends a signal to the control module. After receiving the signal, the control module controls the grinding motor 3110 included in the fourth grinding section 34 to stop rotating, and the control module controls the second electric push rod 5109 included in the fourth dustproof section 54 to retract. The second electric push rod 5109 drives the arc-shaped dustproof plate 5111 to move downward, so that the upper edge of the arc-shaped dustproof plate 5111 is lower than the lower edge of the feed port 5108, thereby opening the feed port 5108 included in the fourth dustproof section 54. Then, step 2 is repeated.

[0088] Step 7: When the ultrasonic distance sensor 3124 included in the third grinding section 33 detects that the amount of broken tea raw material in the feed funnel 3108 included in the third grinding section 33 is lower than the lower limit, the ultrasonic distance sensor 3124 sends a signal to the control module. After receiving the signal, the control module controls the grinding motor 3110 included in the third grinding section 33 to stop rotating, and the control module controls the second electric push rod 5109 included in the third dustproof section 53 to retract. The second electric push rod 5109 drives the arc-shaped dustproof plate 5111 to move downward, so that the upper edge of the arc-shaped dustproof plate 5111 is lower than the lower edge of the feed port 5108, thereby opening the feed port 5108 included in the third dustproof section 53. Then, step 3 is repeated.

[0089] Step 8: When the ultrasonic distance sensor 3124 included in the second grinding section 32 detects that the amount of broken tea raw material in the feed funnel 3108 included in the second grinding section 32 is lower than the lower limit, the ultrasonic distance sensor 3124 sends a signal to the control module. After receiving the signal, the control module controls the grinding motor 3110 included in the second grinding section 32 to stop rotating, and the control module controls the second electric push rod 5109 included in the second dustproof section 52 to retract. The second electric push rod 5109 drives the arc-shaped dustproof plate 5111 to move downward, so that the upper edge of the arc-shaped dustproof plate 5111 is lower than the lower edge of the feed port 5108, thereby opening the feed port 5108 included in the second dustproof section 52. Then, step 4 is repeated.

[0090] Step 9: When the ultrasonic distance sensor 3124 included in the first grinding section 31 detects that the amount of broken tea raw material in the feed funnel 3108 included in the first grinding section 31 is lower than the lower limit, the ultrasonic distance sensor 3124 sends a signal to the control module. After receiving the signal, the control module controls the grinding motor 3110 included in the first grinding section 31 to stop rotating, and the control module controls the second electric push rod 5109 included in the first dustproof section 51 to retract. The second electric push rod 5109 drives the arc-shaped dustproof plate 5111 to move downward, so that the upper edge of the arc-shaped dustproof plate 5111 is lower than the lower edge of the feed port 5108, thereby opening the feed port 5108 included in the first dustproof section 51. Then, step 5 is repeated.

[0091] Step 10: When a temperature sensor 47 detects that the temperature at the grinding texture 3121 of the lower grinding disc 3105 in the corresponding grinding part is higher than the preset value, the control module adjusts the speed of the grinding motor 3110 in the corresponding grinding part to 40 r / min via the frequency converter. When a temperature sensor 47 in a cooling unit 4 detects that the temperature at the grinding texture 3121 of the lower grinding disc 3105 is lower than the preset value, the control module adjusts the speed of the grinding motor 3110 in the corresponding grinding part to 60 r / min via the frequency converter.

[0092] 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 mill matcha grinding unit, characterized in that, The system includes a mixing unit (2) and a feeding unit that supplies materials to the mixing unit (2); each discharge end of the mixing unit (2) is equipped with a grinding section for grinding matcha, and the mixing unit (2) can distribute matcha to each grinding section according to a predetermined control program; each discharge end of the grinding section is equipped with a conveying unit (6) for collecting tea powder; each grinding section is a first grinding section (31), a second grinding section (32), a third grinding section (33), and a fourth grinding section (34) with identical structures; the mixing unit (2) includes a first feeding section (25), a second feeding section (26), a third feeding section (27), and a fourth feeding section that cooperate with each grinding section and have identical structures. (28); The first grinding part (31) includes a second support frame (2501) supported on the ground. A horizontally extending limiting groove (2502) is provided on the second support frame (2501). A vehicle body (2504) is slidably connected in the limiting groove (2502). An electromagnetic vibration groove (2506) is installed on the vehicle body (2504) and is inclined downward. The electromagnetic vibration groove (2506) can reciprocate linearly sliding along the limiting groove (2502) towards or away from the feed inlet of the feed funnel (3108). The second support frame (2501) is provided with a first electric push rod (2) that drives the electromagnetic vibration groove (2506) to generate the reciprocating linear sliding motion. 507); The batching unit (2) further includes a first belt conveyor (22) installed on the first support frame (21), and a second belt conveyor (23) and a third belt conveyor (24) are respectively arranged below the material drop tracks on both sides of the first belt conveyor (22); the second belt conveyor (23) is arranged above two adjacent sets of electromagnetic vibration troughs (2506), and the two sets of electromagnetic vibration troughs (2506) are respectively located below the material drop tracks at the corresponding ends of the second belt conveyor (23); the third belt conveyor (24) is arranged above two other sets of adjacent electromagnetic vibration troughs (2506), and the two sets of electromagnetic vibration troughs (2506) are respectively located below the material drop tracks at the corresponding ends of the second belt conveyor (23); Below the material drop trajectory at the corresponding end of the machine (24); the grinding unit also includes a dustproof unit (5) that cooperates with the grinding unit (3). The dustproof unit (5) includes a first dustproof part (51), a second dustproof part (52), a third dustproof part (53), and a fourth dustproof part (54) with the same structure. The first dustproof part (51) includes an upper annular placement groove (5101) and a lower annular placement groove (5102) arranged sequentially from top to bottom. The lower annular placement groove (5102) is coaxially fixed to the outside of the receiving base (3103). A support rod (5103) is supported and connected between the upper annular placement groove (5101) and the lower annular placement groove (5102).An annular dust cover (5106) is installed between the upper annular placement groove (5101) and the lower annular placement groove (5102). A circular dust cover (5107) is fitted over the upper annular placement groove (5101). An ultrasonic distance sensor (3124) for detecting the height of broken tea raw materials inside the feed funnel (3108) is fixedly connected to the bottom of the center of the circular dust cover (5107) by screws. A feed port (5108) is provided on the annular dust cover (5106) for inserting the front end of the electromagnetic vibration groove (2506). The corresponding position of the feed port (5108) is... A rectangular limiting slide frame (5104) is installed at the location and is attached to the outer wall of the annular dust cover (5106). An arc-shaped dustproof plate (5111) is slidably installed on the limiting slide frame (5104). The arc-shaped dustproof plate (5111) can reciprocate linearly along the slide groove opened on the limiting slide frame (5104) to move away from or towards the feed port (5108), thereby opening or closing the feed port (5108). A second electric push rod (5109) is installed on the limiting slide frame (5104) to drive the arc-shaped dustproof plate (5111) to produce the reciprocating linear sliding movement.

2. The intelligent continuous stone mill matcha grinding unit according to claim 1, characterized in that, The first grinding unit (31) includes a third support frame (3101) and a receiving base (3103) fixedly installed on the top of the third support frame (3101). The upper surface of the receiving base (3103) is recessed with a cavity, and a lower grinding stone (3105) is fixedly installed at the bottom of the cavity. An upper grinding stone (3107) is coaxially mounted on the upper surface of the lower grinding stone (3105). The surfaces of the two grinding stones that contact each other constitute the grinding surface. A bent passage (3122) for guiding matcha to the grinding surface is opened through the upper grinding stone (3107), and the feed inlet of the bent passage (3122) is connected to a feed funnel (3108) for material leakage and which rotates synchronously and coaxially with the upper grinding stone (3107). The grinding motor (3110) is fixedly installed on the fourth support frame (35), and the driving end of the grinding motor (3110) is connected to the upper grinding stone for transmission to drive the upper grinding stone to rotate.

3. The intelligent continuous stone mill matcha grinding unit according to claim 2, characterized in that, Grinding patterns (3121) are arranged on the surfaces of the two grinding discs that are in contact with each other. The grinding patterns (3121) include a first part and a second part arranged in sequence along the radial direction of the grinding discs. The first part includes an arc-shaped coarse grinding groove extending radially outward along the grinding disc, and the groove depth gradually decreases from the inside to the outside; each coarse grinding groove is evenly distributed on the corresponding disc surface around the axis of the grinding disc to form a spiral structure. The second part includes straight fine grinding grooves that are inclined from the inside to the outside, and the depth of the fine grinding grooves gradually becomes shallower from the inside to the outside; the fine grinding grooves are staggered to form an annular mesh structure, and the annular mesh structure is distributed on the outside of the spiral structure.

4. The intelligent continuous stone mill matcha grinding unit according to claim 3, characterized in that, The grinding motor (3110) is coaxially positioned above the feed hopper (3108). A connecting sleeve (3111) is coaxially fixed to the outside of the drive shaft of the grinding motor (3110). A connecting rod (3112) is coaxially fixed to the bottom end of the connecting sleeve (3111). A first gear (3113) is fixed to the bottom end of the connecting rod (3112). A support plate (3114) is fixedly connected to the top of the circular dustproof plate (5107) by countersunk bolts. The lower end of the connecting rod (3112) is rotatably connected to the inside of the center position of the support plate (3114) by a bearing. 3114) The front part is rotatably connected to a drive shaft (3115) via a bearing. The upper outer wall of the drive shaft (3115) is fixedly connected to a second gear (3116), and the lower outer wall of the drive shaft (3115) is fixedly connected to a third gear (3117). The second gear (3116) meshes with the first gear (3113). The second gear (3116) and the first gear (3113) are located on the upper side of the circular dustproof plate (5107). The third gear (3117) meshes with the gear ring (3109) coaxially fixed on the upper grinding disc (3107). The outer side of the lower grinding disc (3105) and the inner wall of the concave cavity form an annular temporary storage cavity for storing tea powder. A discharge hole (3120) communicating with the temporary storage cavity and used for material leakage is opened at the corresponding position at the bottom of the concave cavity. A brush (3119) that can rotate synchronously with the upper grinding disc (3107) is fixed to the outer side of the upper grinding disc (3107). The brush (3119) can move circumferentially in the temporary storage cavity to sweep the tea powder into the discharge hole (3120) and thus collect the tea powder.

5. The intelligent continuous stone mill matcha grinding unit according to claim 4, characterized in that, The feeding unit includes a vertical elevator (1), and the first belt conveyor (22) is located below the material drop trajectory of the vertical elevator (1).

6. The intelligent continuous stone mill matcha grinding unit according to claim 5, characterized in that, The conveying unit (6) includes an auger conveying cylinder (61) extending along the arrangement direction of each grinding section. A rotating auger (63) is coaxially rotatably installed inside the cavity of the auger conveying cylinder (61). An auger motor (64) is coaxially installed at the drive end of the auger conveying cylinder (61), and the auger motor (64) is connected to the rotating auger (63) in a transmission connection. A discharge funnel (65) is fixedly connected to the auger conveying cylinder (61). The discharge funnel (65) is connected to the cavity of the auger conveying cylinder (61), and the discharge funnel (65) is located below the corresponding discharge hole (3120). The other end of the auger conveying cylinder (61) constitutes the discharge end.

7. The intelligent continuous stone mill matcha grinding unit according to claim 6, characterized in that, The grinding unit also includes a cooling unit (4) for dissipating heat from the grinding disc. The cooling unit (4) includes an aluminum mounting cylinder (41) installed in a cavity at the bottom of the lower grinding disc (3105). The bottom of the aluminum mounting cylinder (41) is sequentially equipped with a cold end fan (45), a cold end aluminum fin (42), a semiconductor cooling chip (44), a hot end aluminum fin (43), and a hot end fan (46). A semi-cylindrical groove is provided at the top of the lower grinding disc (3105), and a temperature sensor (47) is fixedly connected in the semi-cylindrical groove.

8. A control method for an intelligent continuous stone mill matcha grinding unit, characterized in that, The control method applicable to the intelligent continuous stone mill matcha grinding unit as described in claim 7 includes the following steps: S1: The control module controls the operation of each grinding motor (3110) and auger motor (64); when an ultrasonic distance sensor (3124) detects that the amount of broken tea raw material in the corresponding feed hopper (3108) is lower than the lower limit, the ultrasonic distance sensor (3124) sends a signal to the control module. After receiving the signal sent by the ultrasonic distance sensor (3124), the control module controls the corresponding grinding motor (3110) to stop rotating; the control module controls the corresponding second electric push rod (5109) to retract, and the second electric push rod (5109) drives the arc-shaped dustproof plate (5111) to move downward, thereby opening the corresponding feed port (5108). S2: The control module controls the drive motor inside the first belt conveyor (22) to rotate forward / reverse and transport the broken tea raw material on its conveyor belt to the conveyor belt of the second belt conveyor (23) or the third belt conveyor (24); the control module then controls the drive motor inside the second belt conveyor (23) to rotate forward / reverse or the drive motor inside the third belt conveyor (24) to transport the broken tea raw material on its conveyor belt to the corresponding electromagnetic vibration trough (2506); S3: The control module controls the corresponding first electric push rod (2507) to extend, so that the end of the electromagnetic vibration groove (2506) extends to the upper side of the corresponding feed hopper (3108). At this time, the control module can control the electromagnetic vibration groove (2506) to work, and the electromagnetic vibration groove (2506) shakes the broken tea raw material into the corresponding feed hopper (3108). S4: When the corresponding ultrasonic distance sensor (3124) detects that the amount of broken tea raw material in the corresponding feed hopper (3108) is higher than the upper limit, the control module controls the vertical elevator (1), the first belt conveyor (22), the second belt conveyor (23) or the third belt conveyor (24), and the corresponding electromagnetic vibration trough (2506) to stop working. S5: The control module then controls the corresponding first electric push rod (2507) to retract, so that the end of the electromagnetic vibration groove (2506) exits from the corresponding annular dust cover (5106). The control module controls the corresponding second electric push rod (5109) to extend, so that the corresponding feed port (5108) is closed. The control module controls the corresponding grinding motor (3110) to work.

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