Process and matched device for preparing burdock dietary fiber micro powder

Abstract

The invention discloses a technology for preparing burdock dietary fiber micro powder and a matched device, and belongs to the technical field of food processing.The micronization pretreatment device comprises a treatment box, an oscillation grinding assembly and a driving device are installed in the treatment box, and the driving device is arranged at the upper end of the oscillation grinding assembly; a guide assembly is mounted on the upper wall of the treatment box, the upper end of the guide assembly is connected with the driving device, and the lower end of the guide assembly is connected with the oscillation grinding assembly; through cooperation of a driving device and a guide assembly, the distance between a driving plate and an oscillation grinding plate can be flexibly adjusted, and the grinding strength and the oscillation amplitude can be accurately adjusted according to the pretreatment requirement of the burdock dietary fiber micro powder in combination with adjustment and control of the tightness of a traction rope; and meanwhile, the screened large-particle materials can be refluxed through rapid downward movement of the oscillating grinding plate, repeated grinding is achieved, and the uniformity and fineness of material grinding are effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of food processing technology, and in particular relates to a process and supporting equipment for preparing burdock dietary fiber micro powder. Background Technology

[0002] Burdock, a perennial herbaceous plant belonging to the genus Arctium in the family Asteraceae, is used for both food and medicine. Its roots contain more than 50% total dietary fiber by dry weight, of which about 30% is water-soluble fructooligosaccharides. It has excellent prebiotic activity, which can promote blood circulation, cleanse the intestines and detoxify, and regulate blood sugar and lipids. It is known as "nature's best blood cleanser" and has broad application prospects in food processing, biomedicine, functional materials and other fields.

[0003] Burdock dietary fiber micronized powder is an important product of burdock deep processing. Its particle size, distribution uniformity, and retention rate of functional components directly determine the product quality and application effect. Currently, commonly used technologies for preparing fruit and vegetable powders include spray drying, hot air drying, vacuum freeze drying, and ultrafine grinding. Among these, ultrafine grinding technology can grind materials to the cellular level, effectively improving the solubility, dispersibility, and bioavailability of dietary fiber. However, burdock needs to undergo micronization pretreatment before micronization, but existing micronization pretreatment methods have the following drawbacks: 1. Poor adjustability of grinding fineness: Existing devices mostly adopt grinding structures with fixed gaps, which cannot flexibly adjust the size of grinding particles according to actual needs. It is difficult to adapt to the different requirements of micro powder particle size for different application scenarios. In addition, the secondary grinding of large particles after grinding requires manual sorting and transportation, which is cumbersome and inefficient. 2. High temperatures are easily generated during the grinding process. Burdock dietary fiber is a heat-sensitive substance. High temperature environment will cause its active ingredients to be lost and nutrients to be destroyed. At the same time, the micro powder is prone to static electricity adsorption due to high temperature, resulting in agglomeration, which affects product quality. Existing cooling methods are either complex in structure and energy-intensive, or have poor cooling effect. 3. Poor coordination of oscillation grinding: Although some devices are equipped with oscillation structures, the oscillation amplitude and grinding force cannot be coordinated and controlled, which easily leads to insufficient or excessive grinding. In addition, the traction components are prone to loosening and falling off during oscillation, affecting the stability and service life of the device. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a process and supporting equipment for preparing burdock dietary fiber powder, which at least partially solves the above technical problems.

[0005] The technical solution adopted in this invention is as follows: This invention proposes a process for preparing burdock dietary fiber micro powder, comprising the following steps: Step 1: Raw material pretreatment Select fresh, rot-free, and pest-free burdock roots, remove fibrous roots and impurities, and wash them clean; cut them into thin slices and dry them at 55-65℃ until the moisture content is ≤10%; then coarsely pulverize the dried burdock root slices using a micronization pretreatment device to obtain coarse burdock root powder. Step 2: Ethanol reflux for degreasing and impurity removal Add 8-10 times the volume fraction of 95% ethanol or anhydrous ethanol to the coarse powder, reflux at 75-78℃ for 1-2 hours, filter, and dry the filter residue for later use. Step 3: Acid removal of starch and protein Add 15-20 times the weight of deionized water to the filter residue, adjust the pH to 1.0-2.0 with dilute hydrochloric acid, extract in an 80℃ water bath for 1-1.5 hours, filter, and collect the filter residue. Step 4: Alkaline extraction to break cellulose bonds Add 15-20 times the weight of deionized water to the above filter residue, adjust the pH to 10.0-11.0 with dilute NaOH solution, extract in an 80℃ water bath for 1-1.5 hours, filter, and collect the filter residue; Step 5: Rinse with water until neutral. The filter residue was repeatedly washed with deionized water until the pH of the filtrate reached 6.5-7.0, and then filtered until no obvious water droplets were visible. Step 6: Drying and Ultrafine Grinding The wet material is freeze-dried or spray-dried until the moisture content is ≤5%, and then pulverized using an ultra-fine pulverizer to control the particle size to 200-500 mesh, thus obtaining burdock dietary fiber micro powder. Step 7: Sieving, sterilization, and packaging The micronized powder is sieved, graded, sterilized, and aseptically packaged to obtain the finished product.

[0006] The micronization pretreatment device includes a treatment box, in which an oscillating grinding assembly and a driving device are installed. The driving device is located at the upper end of the oscillating grinding assembly. A guide assembly is installed on the upper wall of the treatment box. The upper end of the guide assembly is connected to the driving device, and the lower end of the guide assembly is connected to the oscillating grinding assembly. The driving device includes a first driving component, a second driving component, a fixing component, and a control component. The fixing component is installed on the upper wall inside the processing box, and the processing box supports and fixes the fixing component. The first driving component and the second driving component are both installed on the fixing component. The control component is connected to the first driving component and the second driving component respectively.

[0007] The fixing assembly includes a fixing plate, a mounting base, and a mounting bracket. The upper end of the fixing plate is connected to the upper wall inside the processing box, the mounting base is installed at the lower end of the fixing plate, and the mounting bracket is installed at the lower end of the mounting base.

[0008] The second drive assembly includes a second motor, a driving bevel gear, and a driven bevel gear. The second motor is mounted on the outer wall of the fixed plate, which supports the second motor. The driving bevel gear is movably mounted on the side wall of the mounting base and is connected to the output end of the second motor. The driven bevel gear is movably mounted on the bottom wall of the mounting base, and the driving bevel gear and the driven bevel gear are meshed together.

[0009] The control assembly includes a rotating cylinder, a lifting rod, and a drive plate. The lifting rod is a hollow structure with openings at the top and bottom, and it is movably disposed through the center of the mounting frame. The inner wall of the hollow structure at the top of the lifting rod is threaded. The upper end of the rotating cylinder movably passes through the bottom wall of the mounting base and is connected to the center of the driven bevel gear. The lower end of the rotating cylinder is movably disposed within the hollow cavity of the lifting rod. The outer wall of the rotating cylinder is threaded, and the threaded structure on the outer side of the rotating cylinder matches the threaded structure on the inner side of the upper end of the lifting rod. A slot is formed inside the rotating cylinder. The upper end of the slot passes through the upper wall of the rotating cylinder and the driven bevel gear in sequence, and the lower end of the slot passes through the bottom wall of the rotating cylinder. The drive plate is movably disposed at the center of the lower end of the lifting rod. The lifting rod, the rotating cylinder, and the conveying pipe are placed coaxially.

[0010] The oscillating grinding assembly includes a connecting plate, a storage plate, connecting rods, springs, telescopic rods, an oscillating grinding plate, a first elastic element, a second elastic element, and a screen. One end of the storage plate is connected to the inner wall of the processing box, and the connecting plate is connected to the other end of the storage plate. The processing box, storage plate, and connecting plate are sealed together. The storage plate has an opening and closing door for easy collection of pre-treated materials. The opening and closing door is equipped with a sealing strip to achieve a seal when closed, preventing dust leakage and cold air loss. Multiple sets of connecting rods are provided, and these sets are evenly installed on the upper wall of the connecting plate in a ring. Multiple sets of springs and telescopic rods are also provided, and the lower ends of these sets are evenly installed on the upper wall of the connecting plate in a ring. The springs are sleeved on the outside of the telescopic rods. The connecting plate, springs, and telescopic rods are placed alternately. The oscillating grinding plate is installed on the upper part of the telescopic rods and springs. The first elastic element is located at the bottom of the drive plate; the bottom wall of the vibrating grinding plate has multiple sets of insertion holes, and the connecting rod is equipped with an insertion plate. The insertion plate is matched with the insertion hole and can be movably locked into the insertion hole. One end of the first elastic element is connected to the outer ring of the vibrating grinding plate, one end of the screen is connected to the other end of the first elastic element, and the other end of the screen is connected to the inner side wall of the processing box. The upper end of the second elastic element is connected to the bottom wall of the vibrating grinding plate, and the lower end is connected to the connecting plate. The second elastic element, the vibrating grinding plate, and the connecting plate form a sealed space. The lower end of the traction rope moves through the center of the connecting plate and is connected to the center of the bottom wall of the vibrating grinding plate. The processing box located between the screen and the storage plate is equipped with a dust filter one-way exhaust valve. The dust filter one-way exhaust valve can filter and purify the dust-containing gas inside the processing box before discharging it, and can prevent external air from flowing back into the processing box.

[0011] The guiding assembly includes a tensioning component, a conveying pipe, multiple sets of guide rollers, and a traction rope. The guide rollers are respectively mounted on the upper wall, side wall, and bottom wall of the processing box via brackets. The tensioning component includes a support plate, an adjusting roller, and a hydraulic rod. The support plate is mounted on the upper wall of the processing box, and the fixed end of the hydraulic rod is mounted on the upper end of the support plate. The adjusting roller is connected to the movable end of the hydraulic rod via a bracket. The adjusting roller and the guide roller are both located on the same plane to facilitate the movement of the traction rope. The lower end of the conveying pipe moves through the slot of the rotating cylinder and is located in the hollow cavity of the lifting rod. The upper end moves through the side wall of the mounting base and extends out of the upper wall of the processing box. One end of the traction rope is connected to the upper end of the conveying pipe, and the other end moves sequentially around the guide rollers on the upper wall of the processing box, the adjusting roller, the guide rollers on the side wall of the processing box, and the guide rollers on the bottom wall of the processing box before passing through the center of the connecting plate and connecting to the center of the bottom wall of the vibrating grinding plate. The conveying pipe is a hollow structure with openings at the top and bottom. A connecting hose is installed at the upper end of the conveying pipe, and the connecting hose is connected to clean gas for cooling.

[0012] The lifting rod has a support base installed in the hollow cavity at its lower end. The lower end of the conveying pipe is connected to the support base. A control valve is installed in the support base to control the flow of gas in the conveying pipe. A cavity is formed inside the drive plate. An exhaust hole is formed in an annular shape on the outer wall of the drive plate. The exhaust hole is connected to the cavity. The cavity is connected to the conveying pipe through the control valve. A sealing plate is movably installed on the outer wall of the drive plate. An elastic sealing layer is installed between the sealing plate and the inner wall of the processing box. The sealing plate moves up and down synchronously with the drive plate. The elastic sealing layer always fits against the inner wall of the processing box to ensure the grinding area is sealed.

[0013] The first drive assembly includes a first motor, a driven plate, a driving plate, a sleeve, and a belt. The first motor is mounted on the side wall of the fixed plate, the driving plate is mounted on the output shaft end of the first motor, the driven plate is movably engaged on the outer side wall of the mounting bracket, the belt is movably sleeved on the outer side walls of the driven plate and the driving plate, and the sleeve is symmetrically mounted on the bottom wall of the driven plate.

[0014] The drive plate has symmetrically mounted insert rods on its upper wall, which are matched with sleeves. The upper end of the insert rod is movably installed inside the sleeve. Rotation of the sleeve drives the insert rod to rotate. The outer side of the lifting rod has a square structure, and the center of the mounting bracket has a square through hole that matches the square structure of the outer side of the lifting rod to achieve rotation limit and ensure the stability of the threaded transmission. The bottom wall of the connecting plate is equipped with a fixing seat for supporting and fixing the equipment. The processing box has an opening and closing door, which is located between the screen and the elastic sealing layer to facilitate material conveying. The opening and closing door is equipped with a sealing strip to achieve a seal when closed, preventing dust leakage and cold air loss.

[0015] The beneficial effects of the present invention after adopting the above structure are as follows: (1) Through the coordinated operation of the drive device and the guide component, the distance between the drive plate and the vibrating grinding plate can be flexibly adjusted. Combined with the tension control of the traction rope, the grinding force and vibration amplitude can be precisely adjusted according to the pretreatment requirements of burdock dietary fiber powder. At the same time, the large particles after screening can be returned and repeatedly ground by the rapid downward movement of the vibrating grinding plate, which effectively improves the uniformity and fineness of the material grinding and lays a good foundation for subsequent micronization processing.

[0016] (2) The device is equipped with a complete cooling system. External clean cooling gas is evenly discharged through the conveying pipe and the exhaust hole of the drive plate to cool the burdock powder in real time during the grinding process, so as to avoid the heat generated by grinding from causing the degradation of dietary fiber functional components.

[0017] (3) The fixed components provide stable support for each part of the drive device. The lifting rod adopts a square structure and cooperates with the square through hole of the mounting bracket to realize rotation limit and ensure the stability of the threaded transmission. The guide roller and adjusting roller of the guide component cooperate to ensure smooth power transmission of the traction rope and avoid problems such as jamming and deviation. The power transmission path of each drive component is clear, and the collaborative work efficiency is high, which effectively improves the operating stability and service life of the device.

[0018] (4) By adjusting the control component and cooperating with the first and second drive components, the grinding mode (single grinding, repeated grinding) can be flexibly switched and the grinding fineness can be adjusted. It can adapt to the pretreatment requirements of burdock dietary fiber micronized powder with different particle size requirements. It can be used not only for burdock dietary fiber, but also for the micronized pretreatment of other plant dietary fibers. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the structure of a supporting device for preparing burdock dietary fiber powder according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a supporting device for preparing burdock dietary fiber powder according to the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of a supporting device for preparing burdock dietary fiber powder according to the present invention. Figure 1 ; Figure 4 for Figure 3 A magnified view of a portion at point A; Figure 5 for Figure 3 A magnified view of a portion at point B; Figure 6 for Figure 3 A magnified view of a portion at point C; Figure 7 for Figure 3 A magnified view of a portion at point D; Figure 8 for Figure 3 A magnified view of a portion at point E; Figure 9 A cross-sectional view of a supporting device for preparing burdock dietary fiber powder according to the present invention. Figure 2 ; Figure 10 for Figure 9 A magnified view of a portion of point F.

[0021] In the attached drawings: 1. Processing box; 2. Vibrating grinding assembly; 3. Drive device; 4. Guide assembly; 5. First drive assembly; 6. Second drive assembly; 7. Fixing assembly; 8. Adjustment assembly; 9. Fixing plate; 10. Mounting base; 11. Mounting bracket; 12. Second motor; 13. Driving bevel gear; 14. Driven bevel gear; 15. Rotating cylinder; 16. Lifting rod; 17. Drive plate; 18. Slot; 19. Connecting plate; 20. Storage plate; 21. Connecting rod; 22. Spring; 23. Telescopic rod; 24. 25. Vibrating grinding plate; 26. First elastic element; 27. Second elastic element; 28. Screen; 29. ​​Insertion hole; 30. Insertion plate; 31. Conveying pipe; 32. Guide roller; 33. Traction rope; 34. Support plate; 35. Adjusting roller; 36. Hydraulic rod; 37. Connecting hose; 38. Support seat; 39. Cavity; 40. Exhaust hole; 41. Sealing plate; 42. Elastic sealing layer; 43. First motor; 44. Driven plate; 45. Sleeve; 46. Belt; 47. Insertion rod; 48. Fixed seat. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] This invention proposes a process for preparing burdock dietary fiber powder, comprising the following steps: Step 1: Raw material pretreatment Select fresh, rot-free, and pest-free burdock roots, remove fibrous roots and impurities, and wash them clean; cut them into thin slices and dry them at 55-65℃ until the moisture content is ≤10%; then coarsely pulverize the dried burdock root slices using a micronization pretreatment device to obtain coarse burdock root powder. Step 2: Ethanol reflux for degreasing and impurity removal Add 8-10 times the volume fraction of 95% ethanol or anhydrous ethanol to the coarse powder, reflux at 75-78℃ for 1-2 hours, filter, and dry the filter residue for later use. Step 3: Acid removal of starch and protein Add 15-20 times the weight of deionized water to the filter residue, adjust the pH to 1.0-2.0 with dilute hydrochloric acid, extract in an 80℃ water bath for 1-1.5 hours, filter, and collect the filter residue. Step 4: Alkaline extraction to break cellulose bonds Add 15-20 times the weight of deionized water to the above filter residue, adjust the pH to 10.0-11.0 with dilute NaOH solution, extract in an 80℃ water bath for 1-1.5 hours, filter, and collect the filter residue; Step 5: Rinse with water until neutral. The filter residue was repeatedly washed with deionized water until the pH of the filtrate reached 6.5-7.0, and then filtered until no obvious water droplets were visible. Step 6: Drying and Ultrafine Grinding The wet material is freeze-dried or spray-dried until the moisture content is ≤5%, and then pulverized using an ultra-fine pulverizer to control the particle size to 200-500 mesh, thus obtaining burdock dietary fiber micro powder. Step 7: Sieving, sterilization, and packaging The micronized powder is sieved, graded, sterilized, and aseptically packaged to obtain the finished product.

[0025] like Figures 1-10 As shown, the micronization pretreatment device in step two includes a treatment box 1, in which an oscillating grinding assembly 2 and a driving device 3 are installed. The driving device 3 is located at the upper end of the oscillating grinding assembly 2. A guide assembly 4 is installed on the upper wall of the treatment box 1. The upper end of the guide assembly 4 is connected to the driving device 3, and the lower end of the guide assembly 4 is connected to the oscillating grinding assembly 2. The driving device 3 includes a first driving component 5, a second driving component 6, a fixing component 7, and a regulating component 8. The fixing component 7 is installed on the upper wall inside the processing box 1, and the processing box 1 supports and fixes the fixing component 7. The first driving component 5 and the second driving component 6 are both installed on the fixing component 7. The regulating component 8 is connected to the first driving component 5 and the second driving component 6 respectively. The fixing component 7 includes a fixing plate 9, a mounting base 10, and a mounting bracket 11. The upper end of the fixing plate 9 is connected to the upper inner wall of the processing box 1. The mounting base 10 is installed at the lower end of the fixing plate 9, and the mounting bracket 11 is installed at the lower end of the mounting base 10.

[0026] The second drive assembly 6 includes a second motor 12, a driving bevel gear 13, and a driven bevel gear 14. The second motor 12 is mounted on the outer wall of the fixed plate 9, and the fixed plate 9 supports the second motor 12. The driving bevel gear 13 is movably mounted on the side wall of the mounting base 10 and is connected to the output end of the second motor 12. The driven bevel gear 14 is movably mounted on the bottom wall of the mounting base 10, and the driving bevel gear 13 and the driven bevel gear 14 are meshed together. The second motor 12 can drive the active bevel gear 13 to rotate, and the active bevel gear 13 can drive the driven bevel gear 14 that meshes with it to rotate.

[0027] The control assembly 8 includes a rotating cylinder 15, a lifting rod 16, and a drive plate 17. The lifting rod 16 is a hollow structure with openings at the top and bottom. The lifting rod 16 is movably disposed through the center of the mounting frame 11. The inner side wall of the hollow structure at the upper end of the lifting rod 16 is threaded. The upper end of the rotating cylinder 15 is movably disposed through the bottom wall of the mounting base 10 and connected to the center of the driven bevel gear 14. The lower end of the rotating cylinder 15 is movably disposed in the hollow cavity of the lifting rod 16. The outer side wall of the rotating cylinder 15 is threaded. The outer threaded structure of the rotating cylinder 15 matches the threaded structure on the inner side of the upper end of the lifting rod 16. A slot 18 is opened in the rotating cylinder 15. The upper end of the slot 18 is sequentially disposed through the upper wall of the rotating cylinder 15 and the driven bevel gear 14. The lower end of the slot 18 is disposed through the bottom wall of the rotating cylinder 15. The drive plate 17 is movably disposed at the center of the lower end of the lifting rod 16. The lifting rod 16, the rotating cylinder 15, and the conveying pipe 30 are placed coaxially. It should be noted that the driven bevel gear 14 rotates to drive the rotating cylinder 15 to rotate. Since the rotating cylinder 15 and the lifting rod 16 are threadedly connected, and the movement of the lifting rod 16 is restricted by the mounting bracket 11, the lifting rod 16 can only move up and down along the mounting bracket 11. When the lifting rod 16 moves down, it can push the drive plate 17 to move down. When the lifting rod 16 moves up, it can drive the drive plate 17 to move up.

[0028] The vibrating grinding assembly 2 includes a connecting plate 19, a storage plate 20, a connecting rod 21, a spring 22, a telescopic rod 23, a vibrating grinding plate 24, a first elastic element 25, a second elastic element 26, and a screen 27. One end of the storage plate 20 is connected to the inner wall of the processing box 1, and the connecting plate 19 is connected to the other end of the storage plate 20. The processing box 1, the storage plate 20, and the connecting plate 19 are sealed together. The storage plate 20 has an opening and closing door for easy collection of pre-treated materials. The opening and closing door is equipped with a sealing strip, which prevents leakage when closed. The system is now sealed to prevent dust leakage and cold air loss. Multiple sets of connecting rods 21 are evenly spaced and arranged in a ring on the upper wall of the connecting plate 19. Multiple sets of springs 22 and telescopic rods 23 are also provided, with their lower ends evenly spaced and arranged in a ring on the upper wall of the connecting plate 19. Each spring 22 is sleeved on the outside of the telescopic rod 23. The connecting plate 19, springs 22, and telescopic rods 23 are spaced apart. The vibrating grinding plate 24 is installed on the telescopic rods 23 and springs. The upper end of 22 is located directly below the drive plate 17; the bottom wall of the vibrating grinding plate 24 has multiple sets of insertion holes 28, and an insertion plate 29 is installed on the connecting rod 21. The insertion plate 29 is matched with the insertion hole 28 and can be movably engaged in the insertion hole 28. One end of the first elastic member 25 is connected to the outer ring of the vibrating grinding plate 24, one end of the screen 27 is connected to the other end of the first elastic member 25, and the other end of the screen 27 is connected to the inner side wall of the processing box 1. The upper end of the second elastic member 26 The second elastic element 26, the oscillating grinding plate 24, and the connecting plate 19 form a sealed space. The lower end of the traction rope 32 passes through the center of the connecting plate 19 and is connected to the center of the bottom wall of the oscillating grinding plate 24. The processing box 1, located between the screen 27 and the storage plate 20, is equipped with a dust filter one-way exhaust valve. The dust filter one-way exhaust valve can filter and purify the dust-containing gas inside the processing box 1 before discharging it, and can prevent external air from flowing back into the processing box 1.

[0029] The guiding assembly 4 includes a tensioning component, a conveying pipe 30, multiple sets of guide rollers 31, and a traction rope 32. The guide rollers 31 are respectively mounted on the upper wall, side wall, and bottom wall of the processing tank 1 via brackets. The tensioning component includes a support plate 33, an adjusting roller 34, and a hydraulic rod 35. The support plate 33 is mounted on the upper wall of the processing tank 1. The fixed end of the hydraulic rod 35 is mounted on the upper end of the support plate 33. The adjusting roller 34 is connected to the movable end of the hydraulic rod 35 via a bracket. The adjusting roller 34 and the guide rollers 31 are both located on the same plane to facilitate the movement of the traction rope 32. The lower end of the conveying pipe 30 can rotate through the pipe. The slot 18 of the cylinder 15 is located in the hollow cavity of the lifting rod 16. The upper end of the cylinder 15 extends through the side wall of the mounting base 10 and then extends out of the upper wall of the processing box 1. One end of the traction rope 32 is connected to the upper end of the conveying pipe 30, and the other end is sequentially wound around the guide roller 31, the adjusting roller 34, the guide roller 31 on the side wall of the processing box 1, and the guide roller 31 on the bottom wall of the processing box 1, and then passes through the center of the connecting plate 19 and connects to the center of the bottom wall of the vibrating grinding plate 24. The conveying pipe 30 is a hollow structure with openings at the top and bottom. A connecting hose 36 is installed at the upper end of the conveying pipe 30, and the connecting hose 36 is connected to clean gas for cooling.

[0030] It should be noted that when the lifting rod 16 moves down, it can drive the drive plate 17 and the conveying pipe 30 to move down. The conveying pipe 30 drives the traction rope 32 to move. The lower end of the traction rope 32 drives the vibrating grinding plate 24. The vibrating grinding plate 24 moves down and squeezes the spring 22 and the telescopic rod 23 until the insertion plate 29 is inserted into the insertion hole 28. The connecting rod 21 supports the vibrating grinding plate 24, and the lifting rod 16 stops moving down. The hydraulic rod 35 can adjust the position of the adjusting roller 34, thereby adjusting the tension of the traction rope 32. The guide roller 31 and the outer slot of the adjusting roller 34 can be equipped with a fixing buckle. When the traction rope 32 is inserted into the slot of the guide roller 31 and the adjusting roller 34, the fixing buckle closes to seal the outside of the slot, preventing the loosened traction rope 32 from coming out of the slot. After the traction rope 32 is loosened, when the drive plate 17 is adjusted, the drive plate 17 will drag the loosened traction rope 32 when it moves down. The traction rope 32 will not drive the vibrating grinding plate 24 to move. The length of the loosened traction rope 32 can control the distance between the drive plate 17 and the vibrating grinding plate 24, and the fineness of the grinding can be adjusted according to different requirements.

[0031] Furthermore, after grinding is completed, the traction rope 32 is adjusted to a taut state. When the drive plate 17 moves up and down, it can directly drive the vibrating grinding plate 24 to move up and down through the traction rope 32. The ground material on the vibrating grinding plate 24 enters the screen 27 during vibration. The vibrating screen 27 can screen the material. When the large particles remaining after screening need to be ground again, the drive plate 17 moves down quickly, and the vibrating grinding plate 24 moves down quickly, stretching the first elastic element 25 and the screen 27. The material on the first elastic element 25 and the screen 27 rolls down the inclined edge onto the vibrating grinding plate 24, and the grinding can be repeated.

[0032] A support base 37 is installed in the hollow cavity at the lower end of the lifting rod 16. The lower end of the conveying pipe 30 is connected to the support base 37. A control valve is installed in the support base 37 to control the flow of gas in the conveying pipe 30. A cavity 38 is opened in the drive plate 17. An exhaust hole 39 is opened in an annular shape on the outer wall of the drive plate 17. The exhaust hole 39 is connected to the cavity 38. The cavity 38 is connected to the conveying pipe 30 through the control valve. A sealing plate 40 is movably installed on the outer wall of the drive plate 17. An elastic sealing layer 41 is installed between the sealing plate 40 and the inner wall of the processing box 1. The sealing plate 40 and the drive plate 17 move up and down synchronously. The elastic sealing layer 41 always fits against the inner wall of the processing box 1 to ensure the grinding area is sealed. It should be noted that when the control valve inside the support base 37 is opened, external clean gas enters the delivery pipe 30 through the connecting hose 36 and is delivered to the cavity 38 through the delivery pipe 30, and finally discharged from the exhaust port 39. The cold air can cool the ground burdock powder. The gas finally enters the lower end of the processing box 1 through the screen 27 and is discharged through the one-way filter valve.

[0033] The first drive assembly 5 includes a first motor 42, a driven plate 43, a driving plate 44, a sleeve 45, and a belt 46. The first motor 42 is mounted on the side wall of the fixed plate 9. The driving plate 44 is mounted on the output shaft end of the first motor 42. The driven plate 43 is movably engaged with the outer side wall of the mounting bracket 11. The belt 46 is movably sleeved on the outer side walls of the driven plate 43 and the driving plate 44. The sleeve 45 is symmetrically mounted on the bottom wall of the driven plate 43. It should be noted that the first motor 42 can drive the active plate 44 to rotate, and the active plate 44 drives the driven plate 43 to rotate via the belt 46, and the driven plate 43 drives the sleeve 45 to rotate.

[0034] The drive plate 17 has symmetrically mounted insert rods 47 on its upper wall. The insert rods 47 are matched with the sleeve 45, and the upper end of the insert rods 47 is movably installed inside the sleeve 45. The rotation of the sleeve 45 drives the insert rods 47 to rotate. The outer side of the lifting rod 16 has a square structure. The center of the mounting bracket 11 has a square through hole that matches the square structure of the outer side of the lifting rod 16 to achieve rotation limit and ensure the stability of the threaded transmission. The bottom wall of the connecting plate 19 is equipped with a fixing seat 48 for supporting and fixing the equipment. The processing box 1 has an opening and closing door, which is located between the screen 27 and the elastic sealing layer 41 to facilitate material conveying. The opening and closing door is equipped with a sealing strip to achieve a seal when closed, preventing dust leakage and cold air loss.

[0035] The specific usage of the equipment for preparing burdock dietary fiber powder is as follows: According to the pretreatment particle size requirements of burdock dietary fiber powder, the grinding fineness is adjusted: the hydraulic rod 35 in the guide assembly 4 is activated, and the position of the adjusting roller 34 is adjusted by extending and retracting the hydraulic rod 35, thereby adjusting the tension of the traction rope 32. The length of the traction rope 32 that is relaxed determines the initial distance between the drive plate 17 and the vibrating grinding plate 24. The longer the relaxation length, the smaller the grinding gap and the finer the grinding particle size, and vice versa. After the adjustment is completed, the hydraulic rod 35 is closed, and the appropriate speed of the first motor 42 and the second motor 12 is set according to the grinding requirements to ensure stable power transmission.

[0036] Open the opening and closing door on the processing box 1 between the screen 27 and the elastic sealing layer 41, and pour the pre-treated burdock raw material (with impurities removed and cut into small pieces) evenly onto the vibrating grinding plate 24. The amount poured in should not be too much to avoid affecting the grinding and vibration effect. After the material is added, close the opening and closing door to ensure that it is sealed in place to prevent dust from overflowing and cold air from escaping during the grinding process.

[0037] Start the main switch of the device, and sequentially turn on the cooling gas source, control valve, first motor 42, and second motor 12. Cooling gas enters the delivery pipe 30 through the connecting hose 36, passes through the control valve in the support base 37, and enters the cavity 38 of the drive plate 17. Finally, it is evenly discharged from the exhaust port 39 on the outside of the drive plate 17, providing real-time cooling of the burdock raw material on the vibrating grinding plate 24 to prevent the degradation of dietary fiber functional components due to heat generated during grinding. The second motor 12 drives the active bevel gear 13 to rotate, which in turn drives the meshing driven bevel gear 14 to rotate, thereby rotating the rotating cylinder 15. Because the rotating cylinder 15 is connected to the lifting... The rod 16 is threaded and is limited by the mounting bracket 11. The lifting rod 16 drives the drive plate 17 to move downward until the drive plate 17 contacts the material on the vibrating grinding plate 24. At the same time, the first motor 42 drives the active plate 44 to rotate. The active plate 44 drives the driven plate 43 to rotate through the belt 46. The driven plate 43 drives the sleeve 45 to rotate. The sleeve 45 drives the insertion rod 47 to rotate, which in turn drives the drive plate 17 to rotate. The drive plate 17 cooperates with the vibrating grinding plate 24 to perform rotary grinding of the burdock raw material.

[0038] After grinding for a period of time, the first motor 42 is turned off, stopping the rotation of the drive plate 17. The traction rope 32 is adjusted to a taut state via the hydraulic rod 35. Then, the second motor 12 is controlled to reverse, causing the rotating drum 15 to reverse. The lifting rod 16 drives the drive plate 17 to move up and down. The drive plate 17 drives the vibrating grinding plate 24 to vibrate up and down via the traction rope 32. The ground material on the vibrating grinding plate 24 enters the screen 27 during the vibration. The screen 27 vibrates synchronously under the action of the oscillation force and the first elastic element 25, screening the material. Fine powder that meets the particle size requirements passes through the screen 27 and falls onto the storage plate 20, while large particles remain on the screen 27. If secondary grinding of large particles is required, the drive plate 17 is controlled to move down quickly, causing the vibrating grinding plate 24 to move down quickly, stretching the first elastic element 25 and the screen 27. The large particles on the screen 27 roll down along the inclined edge of the screen 27 onto the vibrating grinding plate 24. The grinding operation in step 4 is repeated until all materials meet the particle size requirements.

[0039] After all materials have been ground and sieved, turn off the second motor 12, the first motor 42, the control valve, and the cooling gas source in sequence. After the device has completely stopped running and cooled to room temperature, open the door on the storage plate 20 to collect the sieved burdock dietary fiber powder, completing the pretreatment operation.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A process for preparing burdock dietary fiber powder, characterized in that: Includes the following steps: Step 1: Raw material pretreatment Select fresh, rot-free, and pest-free burdock roots, remove fibrous roots and impurities, and wash them clean; cut them into thin slices and dry them at 55-65℃ until the moisture content is ≤10%; then coarsely pulverize the dried burdock root slices using a micronization pretreatment device to obtain coarse burdock root powder. Step 2: Ethanol reflux for degreasing and impurity removal Add 8-10 times the volume fraction of 95% ethanol or anhydrous ethanol to the coarse powder, reflux at 75-78℃ for 1-2 hours, filter, and dry the filter residue for later use. Step 3: Acid removal of starch and protein Add 15-20 times the weight of deionized water to the filter residue, adjust the pH to 1.0-2.0 with dilute hydrochloric acid, extract in an 80℃ water bath for 1-1.5 hours, filter, and collect the filter residue. Step 4: Alkaline extraction to break cellulose bonds Add 15-20 times the weight of deionized water to the above filter residue, adjust the pH to 10.0-11.0 with dilute NaOH solution, extract in an 80℃ water bath for 1-1.5 hours, filter, and collect the filter residue; Step 5: Rinse with water until neutral. The filter residue was repeatedly washed with deionized water until the pH of the filtrate reached 6.5-7.0, and then filtered until no obvious water droplets were visible. Step 6: Drying and Ultrafine Grinding The wet material is freeze-dried or spray-dried until the moisture content is ≤5%, and then pulverized using an ultra-fine pulverizer to control the powder particle size to 200-500 mesh, thus obtaining burdock dietary fiber micro powder. Step 7: Sieving, sterilization, and packaging The micronized powder is sieved, graded, sterilized, and aseptically packaged to obtain the finished product.

2. The process for preparing burdock dietary fiber powder according to claim 1, characterized in that: The micronization pretreatment device in step two includes a treatment box, in which an oscillating grinding assembly and a driving device are installed. The driving device is located at the upper end of the oscillating grinding assembly. A guide assembly is installed on the upper wall of the treatment box. The upper end of the guide assembly is connected to the driving device, and the lower end of the guide assembly is connected to the oscillating grinding assembly. The driving device includes a first driving component, a second driving component, a fixing component, and a control component. The fixing component is installed on the upper wall inside the processing box. The first driving component and the second driving component are both installed on the fixing component. The control component is connected to the first driving component and the second driving component respectively.

3. The process for preparing burdock dietary fiber powder according to claim 2, characterized in that: The fixing assembly includes a fixing plate, a mounting base, and a mounting bracket. The upper end of the fixing plate is connected to the upper wall inside the processing box, the mounting base is installed at the lower end of the fixing plate, and the mounting bracket is installed at the lower end of the mounting base.

4. The process for preparing burdock dietary fiber powder according to claim 3, characterized in that: The second drive assembly includes a second motor, a driving bevel gear, and a driven bevel gear. The second motor is mounted on the outer wall of the fixed plate. The driving bevel gear is movably mounted on the side wall of the mounting base and is connected to the output end of the second motor. The driven bevel gear is movably mounted on the bottom wall of the mounting base, and the driving bevel gear and the driven bevel gear are meshed together.

5. The process for preparing burdock dietary fiber powder according to claim 4, characterized in that: The control assembly includes a rotating cylinder, a lifting rod, and a drive plate. The lifting rod is a hollow structure with openings at the top and bottom, and it is movably disposed through the center of the mounting frame. The inner wall of the hollow structure at the top of the lifting rod is threaded. The upper end of the rotating cylinder movably passes through the bottom wall of the mounting base and is connected to the center of the driven bevel gear. The lower end of the rotating cylinder is movably disposed within the hollow cavity of the lifting rod. The outer wall of the rotating cylinder is threaded, and the threaded structure on the outer side of the rotating cylinder matches the threaded structure on the inner side of the upper end of the lifting rod. A slot is formed inside the rotating cylinder. The upper end of the slot passes through the upper wall of the rotating cylinder and the driven bevel gear in sequence, and the lower end of the slot passes through the bottom wall of the rotating cylinder. The drive plate is movably disposed at the center of the lower end of the lifting rod.

6. The process for preparing burdock dietary fiber powder according to claim 5, characterized in that: The oscillating grinding assembly includes a connecting plate, a storage plate, connecting rods, springs, telescopic rods, an oscillating grinding plate, a first elastic element, a second elastic element, and a screen. One end of the storage plate is connected to the inner wall of the processing box, and the connecting plate is connected to the other end of the storage plate. Multiple sets of connecting rods are evenly spaced and arranged in a ring on the upper wall of the connecting plate. Multiple sets of springs and telescopic rods are also provided, with their lower ends evenly spaced and arranged in a ring on the upper wall of the connecting plate. The springs are sleeved on the outside of the telescopic rods. The oscillating grinding plate is installed on the upper end of the telescopic rods and springs. The screen is located at the bottom of the drive plate. Multiple sets of insertion holes are provided on the bottom wall of the vibrating grinding plate. Insert plates are installed on the connecting rod, and the positions of the insert plates and insertion holes are matched. One end of the first elastic element is connected to the outer ring of the vibrating grinding plate. One end of the screen is connected to the other end of the first elastic element, and the other end of the screen is connected to the inner side wall of the processing box. The upper end of the second elastic element is connected to the bottom wall of the vibrating grinding plate, and the lower end is connected to the connecting plate. The lower end of the traction rope moves through the center of the connecting plate and connects to the center of the bottom wall of the vibrating grinding plate. A dust filter one-way exhaust valve is installed in the processing box located between the screen and the storage plate.

7. The process for preparing burdock dietary fiber powder according to claim 6, characterized in that: The guiding assembly includes a tensioning component, a conveying pipe, multiple sets of guide rollers, and a traction rope. The guide rollers are respectively mounted on the upper wall, side wall, and bottom wall of the processing box via brackets. The tensioning component includes a support plate, an adjusting roller, and a hydraulic rod. The support plate is mounted on the upper wall of the processing box, and the fixed end of the hydraulic rod is mounted on the upper end of the support plate. The adjusting roller is connected to the movable end of the hydraulic rod via a bracket. The lower end of the conveying pipe moves through the slot of the rotating cylinder and is located in the hollow cavity of the lifting rod. The upper end moves through the side wall of the mounting base and extends out of the upper wall of the processing box. One end of the traction rope is connected to the upper end of the conveying pipe, and the other end moves sequentially around the guide rollers on the upper wall of the processing box, the adjusting roller, the guide rollers on the side wall of the processing box, and the guide rollers on the bottom wall of the processing box before passing through the center of the connecting plate and connecting to the center of the bottom wall of the vibrating grinding plate. The conveying pipe is a hollow structure with openings at the top and bottom, and a connecting hose is installed at the upper end of the conveying pipe.

8. The process for preparing burdock dietary fiber powder according to claim 7, characterized in that: A support base is installed in the hollow cavity at the lower end of the lifting rod. The lower end of the conveying pipe is connected to the support base. A control valve is installed inside the support base. A cavity is opened inside the drive plate. An exhaust hole is opened in an annular shape on the outer wall of the drive plate. The exhaust hole is connected to the cavity. The cavity is connected to the conveying pipe through the control valve. A sealing plate is movably installed on the outer wall of the drive plate. An elastic sealing layer is installed between the sealing plate and the inner wall of the processing box.

9. The process for preparing burdock dietary fiber powder according to claim 8, characterized in that: The first drive assembly includes a first motor, a driven plate, a driving plate, a sleeve, and a belt. The first motor is mounted on the side wall of the fixed plate, the driving plate is mounted on the output shaft end of the first motor, the driven plate is movably engaged on the outer side wall of the mounting bracket, the belt is movably sleeved on the outer side walls of the driven plate and the driving plate, and the sleeve is symmetrically mounted on the bottom wall of the driven plate.

10. The process for preparing burdock dietary fiber powder according to claim 9, characterized in that: The drive plate has symmetrically installed insert rods on its upper side, which are matched with the sleeves. The upper end of the insert rod is movably installed inside the sleeve. The outer side of the lifting rod has a square structure. The center of the mounting frame has a square through hole that matches the square structure on the outer side of the lifting rod. The bottom wall of the connecting plate has a fixed seat. The processing box has an opening and closing door, which is located between the screen and the elastic sealing layer.

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