A food additive grading and grinding equipment and its operating method

Abstract

This invention belongs to the field of food additive grinding technology, and specifically discloses a food additive grading and grinding equipment and its operating method, including a grinding cylinder and a bellows. The grinding cylinder is fixed on the top of the bellows and is interconnected with the bellows. A base plate is fixed at the bottom of the bellows, and a conveying pipe is connected to the top of the grinding cylinder. In this invention, powder particles can be ground by the grinding device, and the airflow is pressurized. The pressurized airflow conveys the ground powder particles to a sieving device for sieving. After sieving, the powder particles that meet the requirements are discharged from the sieving device through the conveying pipe. The powder particles that do not meet the requirements located outside the sieving device will fall back into the grinding device for secondary grinding. The powder particles that do not meet the requirements located inside the sieving device will fall into the collecting cylinder for collection and finally be discharged into the annular temporary storage chamber. The material distribution component intermittently conveys them to the grinding device for secondary grinding.

Description

Technical Field

[0001] This invention relates to the field of food additive grinding technology, and in particular to a food additive grading and grinding equipment and its operating method. Background Technology

[0002] Food additives are chemically synthesized or natural substances added to food to improve its quality, color, aroma, and taste, as well as for preservation and processing needs. When producing some powdered food additives, they need to be ground.

[0003] Currently, grinding equipment mostly uses grinding rollers to grind food additives that need to be ground. After grinding, high-speed airflow is used to transport the powder along with the airflow for collection. However, because some powder particles are irregular in shape and heavy, some non-compliant powder particles will enter the pipeline during sieving. When the airflow rises inside the pipeline, some non-compliant powder particles will accumulate due to their heavy weight, causing blockage inside the grinding equipment. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a food additive grading and grinding equipment and its operating method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a food additive grading and grinding device, comprising a grinding cylinder and a bellows, wherein the grinding cylinder is fixed on the top of the bellows and is interconnected with the bellows, a bottom plate is fixed on the bottom of the bellows, a conveying pipe is connected to the top of the grinding cylinder, a perforated plate is fixed between the inner walls of the grinding cylinder near the bottom edge, a drive shaft is rotatably arranged between the inner walls of the perforated plate, a grinding device is arranged on the drive shaft, and a bent guide ring is fixed on the inner top surface of the grinding cylinder, wherein the inner wall of the bent guide ring is in contact with the outer surface of the bottom end of the conveying pipe; A screening device is provided at the bottom of the bent guide ring, a material distribution component is provided inside the grinding cylinder at the top edge of the drive shaft, a guide sleeve is provided inside the grinding cylinder, and support plates are fixed between the outer surfaces of both sides of the guide sleeve and the inner wall of the grinding cylinder.

[0006] Preferably, a conical cover is fixed to the top of the flow guide sleeve, the top of the conical cover extends obliquely to the inner top edge of the grinding cylinder and is located on one side of the bent flow guide ring, an air inlet pipe is connected to one side of the air box, a motor is arranged on the top of the air box near the other side, the output end of the motor extends through the interior of the air box, a pulley is fixed to the output end of the motor, an inertia wheel is fixed to the bottom end of the drive shaft, and a belt is arranged between the outer surface of the inertia wheel and the pulley.

[0007] Preferably, the grinding device includes a fixed roller fixed to the outer surface of the drive shaft, an inner sleeve fixed between the inner walls of the guide sleeve, a gap between the inner wall of the inner sleeve and the outer surface of the fixed roller, a plurality of annular grinding grooves equally spaced between the inner walls of the inner sleeve, and a plurality of grinding wheels equally spaced and rotatably arranged on the outer surface of the fixed roller, one side of each of the plurality of grinding wheels extending into the interior of the annular grinding groove, and the outer surface of the grinding wheel rollingly adhering to the inner wall of the annular grinding groove.

[0008] Preferably, a support ring is fixed between the inner walls of the grinding cylinder, the top of the support ring is inclined, a conical guide plate is fixed on the outer surface of the drive shaft, the bottom of the conical guide plate extends from the edge of the outer surface to the top of the support ring, and the bottom of the conical guide plate slides against the top of the support ring, and multiple partitions are fixed at equal intervals on the top of the conical guide plate, and the conical guide plate is located below the fixed roller.

[0009] Preferably, the top of the support ring is provided with multiple through holes that extend to the bottom at equal intervals near the outer surface edge. All of the through holes are located on one side of the guide sleeve. An annular steam turbine is rotatably arranged between the inner walls of the grinding cylinder. The annular steam turbine is located below the multiple through holes. Multiple support rods are fixed between the inner wall of the annular steam turbine and the outer surface of the drive shaft.

[0010] Preferably, the screening device includes two fixed rings, and multiple vertical plates are rotatably arranged at equal intervals along the circumferential direction between opposite sides of the two fixed rings. One of the fixed rings is installed at the bottom of the bent guide ring, and a fixed sleeve is fixed at the bottom of the other fixed ring. Multiple eccentric openings are equidistantly opened along the circumferential direction on the inner wall of the other fixed ring. Torque shafts are rotatably arranged inside each of the multiple eccentric openings. The tops of the multiple torque shafts slide through to the top of the fixed ring and are fixed to the bottom of the vertical plate. Spring pressure plates are fixed to the outer surfaces of the multiple torque shafts, and one end of each spring pressure plate extends to the inner side of the fixed ring.

[0011] Preferably, an annular cavity is formed between the inner walls of the fixing sleeve, and a collecting cylinder is slidably disposed between the inner walls of the fixing sleeve. An annular plate is fixed to the outer surface of the collecting cylinder inside the annular cavity. A first spring is fixed to the bottom of the annular plate. The bottom of the first spring is slidably attached to the bottom surface inside the annular cavity. The bottom surface of the collecting cylinder is inclined. The inner side of the collecting cylinder extends upward and is slidably attached to the outer surface of the drive shaft. Multiple spring paddles are equidistantly fixed to the outer surface of the collecting cylinder near the top edge. One end of each of the multiple spring paddles is slidably attached to one side of multiple upright plates. A pressure ring is fixed to the outer surface of the collecting cylinder near the top edge. The pressure ring is located above one end of the multiple spring pressure plates.

[0012] Preferably, the material distribution assembly includes a material distribution sleeve, a connecting plate fixed between the outer surface of the material distribution sleeve and the inner wall of the conical cover, the inner wall of the material distribution sleeve slidingly fitting against the outer surface of the drive shaft, an annular guide groove opened at the top of the material distribution sleeve, the bottom of the collecting cylinder slidingly fitting between the inner walls of the two sides of the annular guide groove, a plurality of discharge ports equidistantly opened at one side of the inner wall of the collecting cylinder along the circumferential direction at the bottom, an annular temporary storage cavity opened inside the material distribution sleeve, a plurality of discharge ports penetrating into the annular temporary storage cavity equidistantly opened at the inner wall of the annular guide groove along the circumferential direction, two discharge ports penetrating into the bottom of the material distribution sleeve opened on the inner bottom surface of the annular temporary storage cavity, the bottom of the material distribution sleeve slidingly fitting against the top of the fixed roller, a bent flow channel opened near the top edge of the outer surface of the fixed roller, one end of the bent flow channel penetrating into the top of the fixed roller and located directly below the discharge port.

[0013] Preferably, the drive shaft has an internal flow channel extending to the top. A sealing ring is fixed between the inner walls of the internal flow channel near the top edge. A cylindrical plug is slidably sealed between the inner walls of the sealing ring inside the internal flow channel. Multiple side openings extending into the internal flow channel are equidistantly opened on the outer surface of the drive shaft near the top edge. Guide plates are slidably installed inside each of the multiple side openings. One end of each guide plate is fixed to the outer surface of the cylindrical plug, and the other end of each guide plate is fixed to the inner wall of the collecting cylinder. Multiple air inlets extending to the outside are equidistantly opened on the inner wall of the internal flow channel near the bottom edge.

[0014] This invention also provides a method for grading and grinding food additives, applied to a food additive grading and grinding device, the method comprising the following steps: Step S1: The grinding device can grind the powder particles and pressurize the airflow. The pressurized airflow will transport the ground powder particles to the screening device for screening. After screening, the powder particles that meet the requirements will be discharged from the screening device through the conveying pipe. The powder particles that do not meet the requirements located outside the screening device will fall back into the grinding device for secondary grinding. The powder particles that do not meet the requirements located inside the screening device will fall into the collection cylinder for collection and finally be discharged into the annular temporary storage chamber. The material distribution component will intermittently transport them to the grinding device for secondary grinding. Step S2: When the grinding device is working, the grinding wheel grinds the material inside the annular grinding groove. The ground powder flows from the conical guide plate to the top of the support ring under the action of centrifugal force. Under the guidance of the inclined surface at the top of the support ring, the powdery material flows to the through-hole. Step S3: When the screening device is working, the low-pressure airflow is blown out from the inner flow channel through the air inlet. Inside the collection cylinder, the pressurized high-pressure airflow, along with the powder particles, is blown towards multiple vertical plates under the guidance of the bent guide ring. The gap between two adjacent vertical plates near the inner side of the fixed ring is smaller than the gap near the outer side. Therefore, smaller powder particles can enter the inside of the fixed ring through the gap on the inner side of the vertical plate and are located above the collection cylinder. Larger powder particles will be blocked by the gradually decreasing gap between two adjacent vertical plates. Step S4: When the material distribution component is working, the fixed roller is driven to rotate by the drive shaft. Whenever the bending channel slides from the opening at the top of the fixed roller to below the discharge port, the material inside the annular temporary storage chamber can enter the bending channel from the discharge port. Then, due to the centrifugal force generated when the fixed roller rotates, the material in the bending channel can be discharged to the outside of the fixed roller, so that it falls into the grinding wheel and the annular grinding groove for further grinding.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention uses a grinding device to grind powdered particles while simultaneously pressurizing the airflow. The pressurized airflow then transports the ground powdered particles to a screening device for screening. Powdered particles that meet the requirements after screening are discharged from the screening device through a conveying pipe. Powdered particles that do not meet the requirements and are located outside the screening device fall back into the grinding device for secondary grinding. Powdered particles that do not meet the requirements and are located inside the screening device fall into a collecting cylinder for collection and are finally discharged into an annular temporary storage chamber. The material distribution component then intermittently transports them to the grinding device for secondary grinding. 2. In this invention, when the grinding device is working, the grinding wheel grinds the material inside the annular grinding groove. When the drive shaft rotates, it drives the conical guide plate to rotate. Under the action of centrifugal force, the powdery material on it helps to flow to the top of the support ring. At the same time, it drives the annular steam turbine to rotate. Under the rotation of the annular steam turbine, the pressure of the low-pressure airflow is increased and blown towards multiple through-holes. The powdery material flowing towards the through-holes, along with the airflow, is simultaneously blown to the outside of the guide sleeve and the outside of the conical cover. 3. In this invention, when the screening device is working, the low-pressure airflow is blown out from the inner channel through the air inlet. Inside the collection cylinder, the pressurized high-pressure airflow, along with the powder particles, is blown toward multiple vertical plates under the guidance of the bent guide ring. The gap between the two adjacent vertical plates near the inner side of the fixed ring is smaller than the gap near the outer side. Therefore, smaller powder particles can enter the inside of the fixed ring through the gap on the inner side of the vertical plate and are located above the collection cylinder. Larger powder particles are blocked by the gradually decreasing gap between the two adjacent vertical plates. At the same time, when the drive shaft rotates, the mutual constraint between the side opening and the guide plate will drive the collection cylinder to rotate. When the collection cylinder rotates, one end of the multiple spring paddles set on it will slide along one end of the vertical plate, knocking on one end of the vertical plate to make the vertical plate vibrate, thereby vibrating off the powder particles attached to the outer surface of the vertical plate. 4. In this invention, when the material distribution component is working, the fixed roller is driven to rotate by the drive shaft. Since the bottom of the material distribution sleeve is slidably attached to the top of the fixed roller, whenever the opening of the bending channel at the top of the fixed roller slides to below the discharge port, the material inside the annular temporary storage cavity can enter the bending channel from the discharge port. Then, since the fixed roller generates centrifugal force when it rotates, the material in the bending channel can be discharged to the outside of the fixed roller, so that it falls into the grinding wheel and the annular grinding groove for further grinding. Attached Figure Description

[0016] Figure 1 This invention provides a front-view three-dimensional structural diagram of a food additive grading and grinding device; Figure 2 This invention provides a cross-sectional three-dimensional structural diagram of a food additive grading and grinding device; Figure 3 This invention provides a cross-sectional three-dimensional structural diagram of the grinding cylinder in a food additive grading and grinding device; Figure 4 This invention provides a partial cross-sectional three-dimensional structural diagram of the grinding cylinder in a food additive grading and grinding device; Figure 5 This invention provides a cross-sectional perspective view of the sieving device in a food additive grading and grinding equipment. Figure 6 This invention provides a side-sectional perspective view of the sieving device in a food additive grading and grinding equipment. Figure 7 This invention provides a three-dimensional cross-sectional view of the sieving device in a food additive grading and grinding equipment. Figure 8 This invention provides a cross-sectional three-dimensional structural diagram of the collection cylinder in a food additive grading and grinding device; Figure 9 For the present invention Figure 2 A magnified view of a portion of point A in the middle; Figure 10 For the present invention Figure 5 A magnified view of a portion of point B in the middle.

[0017] In the diagram: 1. Grinding cylinder; 2. Air box; 3. Base plate; 4. Air inlet pipe; 5. Motor; 6. Conveying pipe; 7. Inertia wheel; 8. Pulley; 9. Belt; 10. Plum blossom plate; 11. Drive shaft; 12. Inner flow channel; 13. Air inlet; 14. Annular turbine; 15. Support rod; 16. Support ring; 17. Through-hole; 18. Guide sleeve; 19. Conical shroud; 20. Support plate; 21. Inner sleeve; 22. Annular grinding groove; 23. Bending guide ring; 24. Fixing ring; 25. Fixing sleeve; 26. Fixing roller; 27. 1. Grinding wheel; 28. Connecting plate; 29. ​​Vertical plate; 30. Annular cavity; 31. Annular plate; 32. First spring; 33. Collecting cylinder; 34. Discharge port; 35. Cylindrical plug; 36. Guide plate; 37. Torque shaft; 38. Paddle; 39. Spring pressure plate; 40. Spring paddle; 41. Pressure ring; 42. Side opening; 43. Sealing ring; 44. Distribution sleeve; 45. Annular temporary storage cavity; 46. Discharge port; 47. Bending flow channel; 48. Conical guide plate; 49. Partition plate; 50. Annular guide groove; 51. Discharge port. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-10 The present invention provides a technical solution: a food additive grading and grinding device, including a grinding cylinder 1 and a bellows 2. The grinding cylinder 1 is fixed on the top of the bellows 2 and is interconnected with the bellows 2. A bottom plate 3 is fixed at the bottom of the bellows 2. A conveying pipe 6 is connected to the top of the grinding cylinder 1. A plum blossom plate 10 is fixed between the inner walls of the grinding cylinder 1 near the bottom edge. A drive shaft 11 is rotatably arranged between the inner walls of the plum blossom plate 10. A grinding device is arranged on the drive shaft 11. A bent guide ring 23 is fixed on the inner top surface of the grinding cylinder 1. The inner wall of the bent guide ring 23 is in contact with the outer surface of the bottom end of the conveying pipe 6. A screening device is provided at the bottom of the bent guide ring 23. A material distribution component is provided inside the grinding cylinder 1 at the top edge of the drive shaft 11. A guide sleeve 18 is provided inside the grinding cylinder 1. Support plates 20 are fixed between the outer surfaces of both sides of the guide sleeve 18 and the inner wall of the grinding cylinder 1. A conical cover 19 is fixed at the top of the guide sleeve 18. The top of the conical cover 19 extends obliquely to the edge of the inner top surface of the grinding cylinder 1 and is located on one side of the bent guide ring 23. An air inlet pipe 4 is connected to one side of the air box 2. A motor 5 is provided at the top of the air box 2 near the other side. The output end of the motor 5 extends through the interior of the air box 2. A pulley 8 is fixed at the output end of the motor 5. An inertia wheel 7 is fixed at the bottom of the drive shaft 11. A belt 9 is provided between the outer surface of the inertia wheel 7 and the pulley 8.

[0020] The effect achieved is as follows: the material is placed inside the grinding cylinder 1, while low-pressure airflow is delivered from the air inlet pipe 4 to the air box 2. Then, the motor 5 is started to rotate, which drives the inertia wheel 7 to rotate through the pulley 8 and belt 9, thereby driving the drive shaft 11 to rotate. At this time, the fixed roller 26 is rotated, and the material is ground by the grinding wheel 27 inside the annular grinding groove 22. The ground powder falls into the top of the conical guide plate 48 through the gap between the outer surface of the fixed roller 26 and the inner wall of the inner sleeve 21, and then flows to the top of the support ring 16. Under the guidance of the inclined surface of the top of the support ring 16, the powdered material flows to the through-hole 17. Furthermore, when the drive shaft 11 rotates, it drives the conical guide plate 48 to rotate, and under the action of centrifugal force, it helps the powdered material on it to flow towards the through-hole 17. The airflow flows towards the top of the support ring 16 and simultaneously drives the annular turbine 14 to rotate. Under the rotation of the annular turbine 14, the pressure of the low-pressure airflow is increased and blown towards multiple through-holes 17. The powdery material flowing towards the through-holes 17, along with the airflow, is simultaneously blown to the outside of the guide sleeve 18 and the outside of the conical cover 19, and then flows out from the top of the conical cover 19. Under the guidance of the outer surface of the bent guide ring 23, the airflow and the powdery material are blown together towards the screening device to screen the powder particles. After screening, the powder particles that meet the requirements are discharged from the conveying pipe 6. The particles that do not meet the requirements located outside the screening device will fall back into the grinding wheel 27 for grinding. The particles that do not meet the requirements located inside the screening device will be intermittently conveyed to the grinding wheel 27 for grinding through the material distribution component.

[0021] like Figure 2 , Figure 3 and Figure 4As shown, the grinding device includes a fixed roller 26, which is fixed to the outer surface of the drive shaft 11. An inner sleeve 21 is fixed between the inner walls of the guide sleeve 18, and a gap is left between the inner wall of the inner sleeve 21 and the outer surface of the fixed roller 26. Multiple annular grinding grooves 22 are equidistantly formed between the inner walls of the inner sleeve 21. Multiple grinding wheels 27 are equidistantly rotatably arranged on the outer surface of the fixed roller 26. One side of each grinding wheel 27 extends into the annular grinding groove 22, and the outer surface of the grinding wheel 27 rolls and fits against the inner wall of the annular grinding groove 22. A support ring 16 is fixed between the inner walls of the grinding cylinder 1, and the top of the support ring 16 is inclined. The outer surface of the drive shaft 11 is fixed with... A conical guide plate 48 extends from the bottom of the outer surface edge to the top of the support ring 16, and the bottom of the conical guide plate 48 slides and fits against the top of the support ring 16. Multiple partitions 49 are fixed at equal intervals on the top of the conical guide plate 48. The conical guide plate 48 is located below the fixed roller 26. Multiple through holes 17 extending to the bottom are opened at equal intervals near the outer surface edge of the top of the support ring 16. The multiple through holes 17 are all located on one side of the guide sleeve 18. An annular steam turbine 14 is rotatably arranged between the inner walls of the grinding cylinder 1. The annular steam turbine 14 is located below the multiple through holes 17. Multiple support rods 15 are fixed between the inner wall of the annular steam turbine 14 and the outer surface of the drive shaft 11.

[0022] The effect achieved is that the material is ground by the grinding wheel 27 inside the annular grinding groove 22. The ground powder falls into the top of the conical guide plate 48 through the gap between the outer surface of the fixed roller 26 and the inner wall of the inner sleeve 21, and then flows to the top of the support ring 16. Under the guidance of the inclined surface of the top of the support ring 16, the powdery material flows to the through port 17. When the drive shaft 11 rotates, it will drive the conical guide plate 48 to rotate. Under the action of centrifugal force, it will help the powdery material on it to flow to the top of the support ring 16. At the same time, it will drive the annular turbine 14 to rotate. Under the rotation of the annular turbine 14, the pressure of the low-pressure airflow is increased and blown to multiple through ports 17. The powdery material flowing to the through ports 17, together with the airflow, is simultaneously blown to the outside of the guide sleeve 18 and the outside of the conical cover 19. Then it flows out from the top of the conical cover 19. Under the guidance of the outer surface of the bent guide ring 23, the airflow and the powdery material are blown together to the screening device to screen the powder particles.

[0023] like Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, the screening device includes two fixed rings 24. Multiple vertical plates 29 are equidistantly arranged circumferentially between opposite sides of the two fixed rings 24. One fixed ring 24 is installed at the bottom of the bent guide ring 23, and a fixed sleeve 25 is fixed to the bottom of the other fixed ring 24. Multiple eccentric openings 38 are equidistantly arranged circumferentially on the inner wall of the other fixed ring 24. Torque shafts 37 are rotatably arranged inside each of the multiple eccentric openings 38. The tops of the multiple torque shafts 37 slide through to the top of the fixed ring 24 and are fixed to the bottom of the vertical plate 29. Spring pressure plates 39 are fixed to the outer surface of each of the multiple torque shafts 37, and one end of each spring pressure plate 39 extends into the inner side of the fixed ring 24. The inner walls of the fixed sleeve 25 are provided with... A collecting cylinder 33 is slidably disposed between the inner wall of the annular cavity 30 and the inner wall of the fixing sleeve 25. An annular plate 31 is fixed to the outer surface of the collecting cylinder 33 inside the annular cavity 30. A first spring 32 is fixed to the bottom of the annular plate 31. The bottom of the first spring 32 is slidably attached to the inner bottom surface of the annular cavity 30. The inner bottom surface of the collecting cylinder 33 is inclined. The inner side of the collecting cylinder 33 extends upward and is slidably attached to the outer surface of the drive shaft 11. Multiple spring paddles 40 are equidistantly fixed to the outer surface of the collecting cylinder 33 near the top edge. One end of each spring paddle 40 is slidably attached to one side of multiple vertical plates 29. A pressure ring 41 is fixed to the outer surface of the collecting cylinder 33 near the top edge. The pressure ring 41 is located above one end of each spring pressure plate 39.

[0024] The effect is that the low-pressure airflow is blown out from the inner flow channel 12 through the air inlet 13. Inside the collection cylinder 33, the pressurized high-pressure airflow, along with powder particles, is blown towards multiple vertical plates 29 under the guidance of the bent guide ring 23. The gap between two adjacent vertical plates 29 near the inner side of the fixing ring 24 is smaller than the gap near the outer side. Therefore, smaller powder particles can enter the interior of the fixing ring 24 through the gaps inside the vertical plates 29 and are located above the collection cylinder 33. Larger powder particles are gradually reduced in size between adjacent vertical plates 29. The gap obstructs the rotation of the drive shaft 11. Simultaneously, the mutual constraint between the side opening 42 and the guide plate 36 causes the collecting cylinder 33 to rotate. As the collecting cylinder 33 rotates, one end of each of its multiple spring-loaded paddles 40 slides along one end of the vertical plate 29, striking that end and causing vibration. This vibration dislodges the powder particles adhering to the outer surface of the vertical plate 29. Furthermore, some thin, irregularly shaped, and heavier substandard powder particles may pass through the gaps between the vertical plates 29 and enter the fixing ring 24. Inside the fixed ring 24, a low-pressure airflow blows towards the conveying pipe 6. Because the powder particles that do not meet the standards are heavier, they fall into the collecting cylinder 33 for collection. Once a certain weight is collected, the collecting cylinder 33 presses down on the first spring 32, causing it to slide downwards. During this sliding process, the discharge port 34 on the collecting cylinder 33 aligns with the discharge port 51. At this point, the substandard powder particles collected inside the collecting cylinder 33 can be discharged into the annular temporary storage chamber 45 for storage. Simultaneously, as the collecting cylinder 33 slides downwards, it is also compressed by the pressure ring 41... Multiple spring plates 39 press and move synchronously to one side, causing the torque shaft 37 to rotate, which in turn causes multiple vertical plates 29 to rotate until one end of the vertical plates 29 is pressed and sealed together. At this time, the high-pressure airflow and powder particles guided by the bent guide ring 23 cannot flow into the vertical plate 29 for screening. At the same time, it will also drive the cylindrical plug 35 to slide down to the point where it is pressed against the sealing ring 43, thus sealing the inner flow channel 12. At this time, the screening device is in a closed state, which helps to discharge the material and prevents the material from being blown up by the airflow during discharge, causing the deposited powder particles to be stirred up again.

[0025] like Figure 2 , Figure 3 and Figure 9As shown, the material distribution assembly includes a material distribution sleeve 44. A connecting plate 28 is fixed between the outer surface of the material distribution sleeve 44 and the inner wall of the conical cover 19. The inner wall of the material distribution sleeve 44 is slidably attached to the outer surface of the drive shaft 11. An annular guide groove 50 is provided at the top of the material distribution sleeve 44. The bottom of the collecting cylinder 33 is slidably attached between the inner walls of the two sides of the annular guide groove 50. Multiple discharge ports 34 are equidistantly provided on one side of the inner wall of the collecting cylinder 33 along the circumferential direction at the bottom. An annular temporary storage cavity 45 is provided inside the material distribution sleeve 44. Multiple discharge ports 51 penetrating into the annular temporary storage cavity 45 are equidistantly provided on the inner wall of the annular guide groove 50 along the circumferential direction. Two discharge ports 46 penetrating into the bottom of the material distribution sleeve 44 are provided on the bottom surface of the annular temporary storage cavity 45. The bottom of the material distribution sleeve 44 is slidably attached to the top of the fixed roller 26. A bent flow channel 47 is provided on the outer surface of the 6 near the top edge. One end of the bent flow channel 47 extends through to the top of the fixed roller 26 and is located directly below the discharge port 46. An inner flow channel 12 extending through to the top is provided inside the drive shaft 11. A sealing ring 43 is fixed between the inner walls of the inner flow channel 12 near the top edge. A cylindrical plug 35 is slidably sealed between the inner walls of the sealing ring 43 inside the inner flow channel 12. Multiple side openings 42 extending through the inner flow channel 12 are provided at equal intervals on the outer surface of the drive shaft 11 near the top edge. A guide plate 36 is slidably provided inside each of the multiple side openings 42. One end of the multiple guide plates 36 is fixed to the outer surface of the cylindrical plug 35, and the other end of the multiple guide plates 36 is fixed to the inner wall of the collecting cylinder 33. Multiple air inlets 13 extending through to the outside are provided at equal intervals on the inner wall of the inner flow channel 12 near the bottom edge.

[0026] The effect achieved is that when the fixed roller 26 is rotated by the drive shaft 11, the bottom of the material distribution sleeve 44 slides and fits against the top of the fixed roller 26. Therefore, whenever the opening of the bending channel 47 at the top of the fixed roller 26 slides to below the discharge port 46, the material inside the annular temporary storage cavity 45 can enter the bending channel 47 from the discharge port 46. Then, because the fixed roller 26 generates centrifugal force when it rotates, the material in the bending channel 47 can be discharged to the outside of the fixed roller 26, so that it falls into the grinding wheel 27 and the annular grinding groove 22 for further grinding.

[0027] For example, in one embodiment, the present invention also provides a method for grading and grinding food additives, applied to the above-mentioned food additive grading and grinding equipment, comprising the following steps: Step S1: The grinding device can grind the powder particles and pressurize the airflow. The pressurized airflow will transport the ground powder particles to the screening device for screening. After screening, the powder particles that meet the requirements will be discharged from the screening device through the conveying pipe 6. The powder particles that do not meet the requirements located outside the screening device will fall back into the grinding device for secondary grinding. The powder particles that do not meet the requirements located inside the screening device will fall into the collection cylinder 33 for collection and finally be discharged into the annular temporary storage chamber 45. The material distribution component will intermittently transport them to the grinding device for secondary grinding. Step S2: When the grinding device is working, the grinding wheel 27 grinds the material inside the annular grinding groove 22. The ground powder flows from the conical guide plate 48 to the top of the support ring 16 under the action of centrifugal force. Under the guidance of the inclined surface at the top of the support ring 16, the powdered material flows to the through-hole 17. Step S3: When the screening device is working, the low-pressure airflow is blown out from the inner flow channel 12 through the air inlet 13. Inside the collection cylinder 33, the pressurized high-pressure airflow, along with the powder particles, is blown towards multiple vertical plates 29 under the guidance of the bent guide ring 23. The gap between the two adjacent vertical plates 29 near the inner side of the fixed ring 24 is smaller than the gap near the outer side. Therefore, smaller powder particles can enter the interior of the fixed ring 24 through the gap inside the vertical plate 29 and are located above the collection cylinder 33. Larger powder particles will be blocked by the gradually decreasing gap between the two adjacent vertical plates 29. Step S4: When the material distribution component is working, the fixed roller 26 is driven to rotate by the drive shaft 11. Whenever the bending channel 47 slides from the opening at the top of the fixed roller 26 to below the discharge port 46, the material inside the annular temporary storage cavity 45 can enter the bending channel 47 from the discharge port 46. Then, because the fixed roller 26 generates centrifugal force when it rotates, the material in the bending channel 47 can be discharged to the outside of the fixed roller 26, so that it falls into the grinding wheel 27 and the annular grinding groove 22 for further grinding.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A food additive grading and grinding device, characterized in that, The grinding cylinder (1) and the bellows (2) are included. The grinding cylinder (1) is fixed on the top of the bellows (2) and is connected to the bellows (2). The bottom of the bellows (2) is fixed with a base plate (3). The top of the grinding cylinder (1) is connected with a conveying pipe (6). A plum blossom plate (10) is fixed between the inner walls of the grinding cylinder (1) near the bottom edge. A drive shaft (11) is rotatably arranged between the inner walls of the plum blossom plate (10). A grinding device is arranged on the drive shaft (11). A bent guide ring (23) is fixed on the inner top surface of the grinding cylinder (1). The inner wall of the bent guide ring (23) is in contact with the outer surface of the bottom end of the conveying pipe (6). The bottom of the bent guide ring (23) is provided with a screening device. The inside of the grinding cylinder (1) is provided with a material distribution component located at the top edge of the drive shaft (11). The inside of the grinding cylinder (1) is provided with a guide sleeve (18). Support plates (20) are fixed between the outer surfaces of both sides of the guide sleeve (18) and the inner wall of the grinding cylinder (1).

2. The food additive grading and grinding equipment according to claim 1, characterized in that: The top of the guide sleeve (18) is fixed with a conical cover (19). The top of the conical cover (19) extends obliquely to the inner top edge of the grinding cylinder (1) and is located on one side of the bent guide ring (23). One side of the air box (2) is connected to the air inlet pipe (4). The top of the air box (2) is provided with a motor (5) near the other side. The output end of the motor (5) extends through the interior of the air box (2). The output end of the motor (5) is fixed with a pulley (8). The bottom end of the drive shaft (11) is fixed with an inertia wheel (7). A belt (9) is provided between the outer surface of the inertia wheel (7) and the pulley (8).

3. The food additive grading and grinding equipment according to claim 1, characterized in that: The grinding device includes a fixed roller (26) fixed on the outer surface of the drive shaft (11). An inner sleeve (21) is fixed between the inner walls of the guide sleeve (18). A gap is left between the inner wall of the inner sleeve (21) and the outer surface of the fixed roller (26). Multiple annular grinding grooves (22) are equidistantly opened between the inner walls of the inner sleeves (21). Multiple grinding wheels (27) are equidistantly rotatably arranged on the outer surface of the fixed roller (26). One side of each of the multiple grinding wheels (27) extends into the interior of the annular grinding groove (22), and the outer surface of the grinding wheel (27) rolls and fits against the inner wall of the annular grinding groove (22).

4. The food additive grading and grinding equipment according to claim 3, characterized in that: A support ring (16) is fixed between the inner walls of the grinding cylinder (1). The top of the support ring (16) is inclined. A conical guide plate (48) is fixed on the outer surface of the drive shaft (11). The bottom of the conical guide plate (48) extends from the edge of the outer surface to the top of the support ring (16). The bottom of the conical guide plate (48) slides against the top of the support ring (16). Multiple partitions (49) are fixed at equal intervals on the top of the conical guide plate (48). The conical guide plate (48) is located below the fixed roller (26).

5. The food additive grading and grinding equipment according to claim 4, characterized in that: The top of the support ring (16) is provided with multiple through holes (17) that extend to the bottom at equal intervals near the edge of the outer surface. All of the through holes (17) are located on one side of the guide sleeve (18). An annular steam turbine (14) is rotatably arranged between the inner walls of the grinding cylinder (1). The annular steam turbine (14) is located below the multiple through holes (17). Multiple support rods (15) are fixed between the inner wall of the annular steam turbine (14) and the outer surface of the drive shaft (11).

6. The food additive grading and grinding equipment according to claim 5, characterized in that: The screening device includes two fixed rings (24). Multiple vertical plates (29) are equidistantly arranged on opposite sides of the two fixed rings (24) in the circumferential direction. One of the fixed rings (24) is installed at the bottom of the bent guide ring (23). A fixed sleeve (25) is fixed at the bottom of the other fixed ring (24). Multiple eccentric openings (38) are equidistantly arranged on the inner wall of the other fixed ring (24) in the circumferential direction. Torque shafts (37) are rotatably arranged inside the multiple eccentric openings (38). The tops of the multiple torque shafts (37) slide through to the top of the fixed ring (24) and are fixed at the bottom of the vertical plate (29). Spring pressure plates (39) are fixed on the outer surface of the multiple torque shafts (37). One end of the multiple spring pressure plates (39) extends to the inner side of the fixed ring (24).

7. The food additive grading and grinding equipment according to claim 6, characterized in that: An annular cavity (30) is provided between the inner walls of the fixed sleeve (25). A collection tube (33) is slidably arranged between the inner walls of the fixed sleeve (25). An annular plate (31) is fixed inside the annular cavity (30) on the outer surface of the collection tube (33). A first spring (32) is fixed at the bottom of the annular plate (31). The bottom of the first spring (32) is slidably attached to the bottom surface inside the annular cavity (30). The bottom surface inside the collection tube (33) is inclined. The inner side of the collection tube (33) extends upward and is slidably attached to the outer surface of the drive shaft (11). Multiple spring paddles (40) are equidistantly fixed on the outer surface of the collection tube (33) near the top edge. One end of each of the multiple spring paddles (40) is slidably attached to one side of multiple upright plates (29). A pressure ring (41) is fixed on the outer surface of the collection tube (33) near the top edge. The pressure ring (41) is located above one end of the multiple spring pressure plates (39).

8. The food additive grading and grinding equipment according to claim 7, characterized in that: The material distribution assembly includes a material distribution sleeve (44). A connecting plate (28) is fixed between the outer surface of the material distribution sleeve (44) and the inner wall of the conical cover (19). The inner wall of the material distribution sleeve (44) is slidably attached to the outer surface of the drive shaft (11). An annular guide groove (50) is provided at the top of the material distribution sleeve (44). The bottom of the collecting cylinder (33) is slidably attached between the inner walls of the two sides of the annular guide groove (50). A plurality of discharge ports (34) are equidistantly provided on one side of the inner wall of the collecting cylinder (33) along the circumferential direction at the bottom. An annular temporary discharge port is provided inside the material distribution sleeve (44). The storage cavity (45) has multiple discharge ports (51) that penetrate into the interior of the annular temporary storage cavity (45) at equal intervals along the circumferential direction on the inner wall of the annular guide groove (50). The bottom surface of the annular temporary storage cavity (45) has two discharge ports (46) that penetrate into the bottom of the distribution sleeve (44). The bottom of the distribution sleeve (44) slides against the top of the fixed roller (26). The outer surface of the fixed roller (26) has a bent flow channel (47) near the top edge. One end of the bent flow channel (47) penetrates into the top of the fixed roller (26) and is located directly below the discharge port (46).

9. A food additive grading and grinding device according to claim 8, characterized in that: The drive shaft (11) has an inner flow channel (12) extending to the top. A sealing ring (43) is fixed between the inner walls of the inner flow channel (12) near the top edge. A cylindrical plug (35) is slidably sealed between the inner walls of the sealing ring (43) inside the inner flow channel (12). Multiple side openings (42) extending into the inner flow channel (12) are equidistantly opened on the outer surface of the drive shaft (11) near the top edge. A guide plate (36) is slidably arranged inside each of the multiple side openings (42). One end of the multiple guide plates (36) is fixed on the outer surface of the cylindrical plug (35), and the other end of the multiple guide plates (36) is fixed on the inner wall of the collecting cylinder (33). Multiple air inlets (13) extending to the outside are equidistantly opened on the inner wall of the inner flow channel (12) near the bottom edge.

10. A method for grading and grinding food additives, applied to a food additive grading and grinding equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: Step S1: The grinding device can grind the powder particles and pressurize the airflow. The pressurized airflow will transport the ground powder particles to the screening device for screening. The powder particles that meet the requirements after screening will be discharged from the screening device through the conveying pipe (6). The powder particles that do not meet the requirements located outside the screening device will fall back into the grinding device for secondary grinding. The powder particles that do not meet the requirements located inside the screening device will fall into the collection cylinder (33) for collection and finally discharged into the annular temporary storage chamber (45). The material distribution component will intermittently transport them to the grinding device for secondary grinding. Step S2: When the grinding device is working, the grinding wheel (27) grinds the material inside the annular grinding groove (22). The ground powder flows from the conical guide plate (48) to the top of the support ring (16) under the action of centrifugal force. Under the guidance of the inclined surface at the top of the support ring (16), the powdered material flows to the through-hole (17). Step S3: When the screening device is working, the low-pressure airflow is blown out from the inner flow channel (12) through the air inlet (13). Inside the collection cylinder (33), the pressurized high-pressure airflow, along with the powder particles, is blown towards multiple vertical plates (29) under the guidance of the bent guide ring (23). The gap between the two adjacent vertical plates (29) near the inner side of the fixed ring (24) is smaller than the gap near the outer side. Therefore, smaller powder particles can enter the fixed ring (24) from the gap inside the vertical plate (29) and are located above the collection cylinder (33). Larger powder particles will be blocked by the gradually decreasing gap between the two adjacent vertical plates (29). Step S4: When the material distribution component is working, the fixed roller (26) is driven to rotate by the drive shaft (11). Whenever the bending channel (47) slides from the opening at the top of the fixed roller (26) to below the discharge port (46), the material inside the annular temporary storage chamber (45) can enter the bending channel (47) from the discharge port (46). Then, because the fixed roller (26) generates centrifugal force when it rotates, the material in the bending channel (47) can be discharged to the outside of the fixed roller (26) and fall into the grinding wheel (27) and the annular grinding groove (22) for further grinding.

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