A fruit and vegetable powder nanoscale particle size control device and process

Abstract

This invention discloses a nanoscale particle size control device for fruit and vegetable powder, including a first discharge pipe, which is fixedly connected to the bottom of a screw conveyor screen. An ultrafine pulverizer is fixedly connected to the bottom of the first discharge pipe. A screen plate is movably fitted inside the first discharge pipe, and a collision component is movably inserted into the side wall of the first discharge pipe. A limit component is slidably connected inside the collision component, and the collision component limits the limit component. When the handle is pulled, the screen plate vibrates, which can shake the material on its surface to prevent the material from accumulating and reducing the feeding speed. When the handle is released, the compressed spring will pop out, and the center of the screen plate will move. When the screen plate returns to its original position, magnet one and three sets of magnet two will re-contact continuously, generating vibration again, thereby fully shaking the material on the surface of the screen plate.

Description

Technical Field

[0001] This invention belongs to the field of nanoscale particle size technology for fruit and vegetable powders, specifically relating to a device and process for controlling the nanoscale particle size of fruit and vegetable powders. Background Technology

[0002] Nanoscale fruit and vegetable powder refers to powdered products made by processing fruits and vegetables through special processes to achieve particle sizes at the nanoscale (1 nanometer equals one billionth of a meter). This technology can greatly improve the solubility and bioavailability of fruit and vegetable powder, making it easier for the human body to absorb its nutrients. In the processing of nanoscale fruit and vegetable powder, there are specialized control devices for screening particle size. These control devices are mainly used to ensure that the particle size distribution of the final product is uniform and meets the required nanoscale standards. Commonly used control devices include screw conveyor screening machines. This equipment combines screw conveyor and screening functions, and can perform preliminary screening during material conveying. It is suitable for conveying materials after coarse crushing and removing larger particles or impurities.

[0003] For example, the double overflow screw conveyor for granular salt screening disclosed in National Patent Publication No. CN215797197U includes a screw conveyor. The front end of the screw conveyor is connected to a feed hopper, and the end is provided with a first overflow port for material to flow out. The screw conveyor is provided with multiple discharge ports for connecting to screening machines at intervals along its material conveying direction. The feed hopper is provided with a second overflow port for the material inside to overflow out. This makes it less likely to cause blockage when conveying materials to multiple screening machines of different specifications at the same time, and the conveyor can continue to operate even when any screening machine stops.

[0004] However, traditional devices still have the following problems when in use:

[0005] When screening fruit and vegetable powder nanoparticles, materials that meet the size requirements are usually directly piled up at the screening port. The powdery fruit and vegetable powder nanoparticles are prone to clogging, and the overflow will greatly reduce the screening efficiency of the material conveyor. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a device and process for controlling the nanoscale particle size of fruit and vegetable powder, which has the advantage of preventing the nanoscale particles of fruit and vegetable powder containing powder from clogging the screen plate, allowing the material to be screened out more smoothly from the screening port.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a nanoscale particle size control device for fruit and vegetable powder, comprising a first discharge pipe, the first discharge pipe being fixedly connected to the outer bottom of a screw conveyor screener, an ultrafine pulverizer being fixedly connected to the lower bottom of the first discharge pipe, the top of the first discharge pipe penetrating the interior of the screw conveyor screener, a screen plate being movably fitted inside the first discharge pipe, a collision component being movably inserted into the side wall of the first discharge pipe, a limit component being slidably connected inside the collision component, and one end of the limit component being movably inserted into the outer side wall of the screen plate, the collision component limiting the limit component, a dustproof component being movably fitted to the top of the screen plate, and the top of the dustproof component being movably fitted to the bottom of a fixed platform, the fixed platform being fixedly connected to the inner ring surface of the first discharge pipe.

[0008] Preferably, an electric motor is installed on one side of the screw conveyor screen, and a screw blade is fixedly connected to the rotating end of the motor. The screw blade is laterally rotatably connected to the inner wall of the screw conveyor screen. A feed inlet is fixedly installed on the top of the outer side of the screw conveyor screen, and the bottom of the feed inlet penetrates the interior of the screw conveyor screen. A second discharge pipe is fixedly installed on the bottom of the outer side of the screw conveyor screen, and the top of the second discharge pipe penetrates the interior of the screw conveyor screen. The first discharge pipe has an annular tubular structure.

[0009] Preferably, a guide plate is fixedly connected to the inner ring surface of the first discharge pipe. The guide plate has an arc-shaped plate structure. A guide block is fixedly connected to the outer ring surface of the screen plate. The guide block is movably fitted with the inner ring surface of the guide plate. Two sets of guide blocks are provided, and the two sets of guide blocks are symmetrically distributed about the center of the screen plate.

[0010] Preferably, the top of the first discharge pipe has multiple sets of screening ports evenly distributed, and the top surface of the screen plate is movably fitted with the bottom surface of the fixed platform.

[0011] Preferably, the outer wall of the first discharge pipe has a movable opening that extends through the interior of the first discharge pipe. The outer wall of the first discharge pipe has a limiting groove with an "L"-shaped plate-like groove structure. The limiting groove communicates with the movable opening, and the collision component is movably inserted into the movable opening.

[0012] Preferably, the collision assembly includes a mounting rod, a rubber strip, a spring, a positioning rod, and an auxiliary plate. The mounting rod has a "T"-shaped column structure and is movably inserted into the movable opening. One end of the mounting rod is located inside the first discharge pipe. The auxiliary plate is fixedly connected to one end of the mounting rod and is in contact with the outer ring surface of the screen plate. The rubber strip has a semi-circular cross-section and is fixedly connected to the outside of the mounting rod. The rubber strip is located between the mounting rod and the outer ring surface of the first discharge pipe.

[0013] Preferably, the mounting rod has a through positioning groove on its side, the positioning rod has a circular cylindrical structure, the two ends of the positioning rod are fixed to the upper top surface and the lower bottom surface of the positioning groove respectively, a spring is fixed between one side of the auxiliary plate and the inner ring surface of the first discharge pipe, and a spring is sleeved on the outer ring surface of the mounting rod.

[0014] Preferably, the limiting component includes a limiting plate and a handle plate. The limiting plate is L-shaped, and the handle plate is C-shaped. The open end of the handle plate is fixedly connected to the top surface of the longer plate of the limiting plate. The limiting plate is slidably connected in the positioning groove. The central horizontal plate and the adjacent vertical plate of the handle plate are slidably connected in the limiting groove. The shorter plate of the limiting plate is movably fitted in the side groove. The side groove is opened on the outer ring surface of the screen plate and is T-shaped.

[0015] Preferably, the top of the limiting plate has a through opening, through which the positioning rod passes. The limiting components are provided in two sets, which are symmetrically distributed about the center of the positioning rod. A second spring is provided between the two sets of limiting components and is sleeved on the outside of the positioning rod.

[0016] Preferably, the dustproof component includes a top holding ring and a rubber sheet. The top of the side groove has a top opening groove, which is a ring-shaped plate with a "T"-shaped cross-section. The top opening groove is connected to the top and side groove. The top holding ring is a ring plate with a "T"-shaped cross-section and is movably fitted inside the top opening groove. The rubber sheet is a ring-shaped plate with a triangular cross-section and is fixed to the top surface of the top holding ring. The rubber sheet is also movably fitted to the bottom of the fixed platform.

[0017] Preferably, a magnet 1 is fixedly installed on the top surface of the screen plate, and a magnet 2 is fixedly installed on the bottom of the fixed platform. There are three sets of magnet 2, which are fixed adjacent to each other. The middle set of magnet 2 attracts magnet 1, and the magnets 2 on the left and right sides of the middle set of magnet 2 repel magnet 1. There are four sets of magnet 1, which are arranged in a ring array about the center of the screen plate.

[0018] Preferably, a process for controlling the nanoscale particle size of fruit and vegetable powder is characterized by including a device for controlling the nanoscale particle size of fruit and vegetable powder as described in any one of the preceding claims, wherein the control process is as follows:

[0019] Step 1: Feed the material into the feed inlet. The material will fall into the inside of the screw conveyor screen. Start the motor to drive the screw blades to rotate, thereby driving the material to be conveyed. When the material is conveyed to the top of the first discharge pipe, the smaller diameter material will fall through the screening port to the next material to be processed, achieving preliminary screening. Larger particles or impurities will continue to be conveyed to the second discharge pipe for output.

[0020] Step 2: The movement of the limiting plate will drive the screen plate to move as a whole. During the movement of the screen plate, magnet 1 on the top of the screen plate will move closer to magnet 2. After magnet 1 and magnet 2 are attracted to each other, they will be attracted together. Conversely, magnet 1 will move away from magnet 2 when it is attracted to each other. During the entire operation of the screen plate, the screen plate will realize the up-and-down undulating motion trajectory.

[0021] Step 3: Release the handle. The compressed spring will pop out, and the center of the screen plate will move back to its original position. When the screen plate returns to its original position, magnet one and the three sets of magnet two will make contact again and generate vibration again. During the back-and-forth movement of the screen plate, the screen plate can achieve two vibrations, thereby fully shaking the material on the surface of the screen plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In this invention, the movement of the limiting plate causes the entire screen plate to move. During the movement, the first magnet on the top of the screen plate moves closer to the second magnet. When the first magnet and the second magnet are attracted to each other, they will attract each other. Conversely, when the first magnet moves closer to the second magnet, they will move away from each other. During the entire operation of the screen plate, the entire screen plate will achieve an up-and-down undulating motion trajectory. When the handle is released, the compressed spring will spring out, and the center of the screen plate will move back to its original position. When the screen plate returns to its original position, the first magnet and the three sets of second magnets will re-contact each other once again, generating undulations again. This fully shakes the material on the surface of the screen plate, thereby preventing the nano-sized particles of fruit and vegetable powder containing powder from clogging the screen plate. This allows the material to be smoothly screened out from the screening port and enter the ultrafine pulverizer for secondary screening. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a partial cross-sectional view of the structure of the present invention.

[0026] Figure 3 This is a half-sectional schematic diagram of the first discharge pipe structure of the present invention.

[0027] Figure 4 This is a partial cross-sectional schematic diagram of the screen plate structure of the present invention.

[0028] Figure 5 This is a half-sectional schematic diagram of the collision component structure of the present invention.

[0029] Figure 6 This is a half-sectional schematic diagram of the limiting component structure of the present invention.

[0030] Figure 7This is a partial schematic diagram of the dustproof component structure of the present invention.

[0031] Figure 8 This is a half-sectional schematic diagram of the first discharge pipe and screen plate of the present invention.

[0032] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point A in the middle.

[0033] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point B.

[0034] In the diagram: 1. Screw conveyor screening machine; 2. Feed inlet; 3. Motor; 4. First discharge pipe; 5. Second discharge pipe; 6. Screw blade; 7. Fixed platform; 8. Guide plate; 9. Movable port; 10. Limiting groove; 11. Screen plate; 12. Guide block; 13. Mounting rod; 14. Rubber strip; 15. Positioning groove; 16. Limiting plate; 17. Handle plate; 18. Spring 1; 19. Positioning rod; 20. Spring 2; 21. Top opening groove; 22. Top holding ring; 23. Rubber sheet; 24. Through port; 25. Screening port; 26. Magnet 1; 27. Magnet 2; 28. Side groove; 29. ​​Auxiliary plate; 30. Ultrafine pulverizer. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0036] Example 1, please refer to Figures 1 to 10 This invention provides a technical solution: a nano-scale particle size control device for fruit and vegetable powder, including a first discharge pipe 4, which is fixedly connected to the outer bottom of a screw conveyor screen 1, and the top of the first discharge pipe 4 penetrates the interior of the screw conveyor screen 1. The device is characterized in that: a screen plate 11 is movably attached to the interior of the first discharge pipe 4, a collision component is movably inserted into the side wall of the first discharge pipe 4, a limit component is slidably connected inside the collision component, and one end of the limit component is movably inserted into the outer side wall of the screen plate 11. The collision component limits the limit component. A dustproof component is movably attached to the top of the screen plate 11, and the top of the dustproof component is movably attached to the bottom of a fixed platform 7. The fixed platform 7 is fixedly connected to the inner ring surface of the first discharge pipe 4.

[0037] During the process of pulling the handle plate 17, the screen plate 11 can shake the material on its surface due to its fluctuation, preventing the material from accumulating and reducing the feeding speed. Finally, when the handle plate 17 is released, the compressed spring 18 will spring out, and the center of the screen plate 11 will also move back to its original position. When the screen plate 11 returns to its original position, the magnet 26 and the three sets of magnets 27 will re-contact continuously once again, generating fluctuation again. During the back-and-forth movement of the screen plate 11, the screen plate 11 can achieve two vibrations, thereby fully shaking the material on the surface of the screen plate 11, thus preventing the nano-sized particles of fruit and vegetable powder containing powder from clogging the screen plate 11, so that the material can be smoothly screened out from the screening port 25 and enter the ultra-fine pulverizer 30 for secondary screening.

[0038] In Example 2, based on Example 1, to achieve material conveying during processing, a motor 3 is installed on the outside of one side of the screw conveyor screen 1. A spiral blade 6 is fixedly connected to the rotating end of the motor 3, and the spiral blade 6 is laterally rotatably connected to the inner wall of the screw conveyor screen 1. A feed inlet 2 is fixedly installed at the top of the outer side of the screw conveyor screen 1, with its bottom penetrating the interior of the screw conveyor screen 1. A second discharge pipe 5 is fixedly installed at the bottom of the outer side of the screw conveyor screen 1, with its top penetrating the interior of the screw conveyor screen 1. Inside the screw conveyor screening machine 1, the first discharge pipe 4 has an annular tubular structure. The inner annular surface of the first discharge pipe 4 is fixedly connected to a guide plate 8, which has an arc-shaped plate structure. The outer annular surface of the screen plate 11 is fixedly connected to a guide block 12. The guide block 12 is in movable contact with the inner annular surface of the guide plate 8. There are two sets of guide blocks 12, which are symmetrically distributed about the center of the screen plate 11. Multiple screening ports 25 are evenly opened at the top of the first discharge pipe 4. The top surface of the screen plate 11 is in movable contact with the bottom surface of the fixed platform 7.

[0039] When the material is fed into the feed inlet 2, it will fall into the inside of the screw conveyor screen 1. The motor 3 is started to drive the screw blades 6 to rotate as a whole, thereby driving the material to be conveyed. When the material is conveyed to the top of the first discharge pipe 4, the smaller diameter material will fall through the screening port 25 to the next material to be processed, realizing the first-level screening, while larger particles or impurities will continue to be conveyed to the second discharge pipe 5 for output.

[0040] In Example 3, based on Example 2, a movable opening 9 is provided on the outer wall of the first discharge pipe 4, extending through the interior of the first discharge pipe 4. A limiting groove 10 is provided on the outer wall of the first discharge pipe 4. The limiting groove 10 has an "L"-shaped plate-like groove structure and communicates with the movable opening 9. The collision component is movably inserted into the movable opening 9. The collision component includes a mounting rod 13, a rubber strip 14, a spring 18, a positioning rod 19, and an auxiliary plate 29. The mounting rod 13 has a "T"-shaped column structure. The mounting rod 13 is movably inserted into the movable port 9, with one end of the mounting rod 13 located inside the first discharge pipe 4. An auxiliary plate 29 is fixedly connected to one end of the mounting rod 13, and the auxiliary plate 29 is in contact with the outer ring surface of the screen plate 11. The rubber strip 14 has a semi-circular cross-section and is fixedly connected to the outside of the mounting rod 13, located between the mounting rod 13 and the outer ring surface of the first discharge pipe 4. A through positioning groove 15 is provided on the side of the mounting rod 13. The positioning rod 19 has a cylindrical structure. The positioning rod 19 is fixed at both ends to the upper top surface and lower bottom surface of the positioning groove 15, respectively. A spring 18 is fixed between one side of the auxiliary plate 29 and the inner ring surface of the first discharge pipe 4. The spring 18 is sleeved on the outer ring surface of the mounting rod 13. The limiting assembly includes a limiting plate 16 and a handle plate 17. The limiting plate 16 is L-shaped, and the handle plate 17 is C-shaped. The open end of the handle plate 17 is fixedly connected to the top surface of the longer plate of the limiting plate 16. The limiting plate 16 is slidably connected within the positioning groove 15. The handle plate 17... The central horizontal plate of 7 and the adjacent vertical plate are slidably connected in the limiting groove 10, and the shorter plate of the limiting plate 16 is movably attached to the side groove 28. The side groove 28 is opened on the outer ring surface of the screen plate 11. The top of the spiral blade 6 is provided with a through hole 24 that passes through the limiting plate 16. The positioning rod 19 passes through the through hole 24. There are two sets of limiting components. The two sets of limiting components are symmetrically distributed about the center of the positioning rod 19. A second spring 20 is provided between the two sets of limiting components. The second spring 20 is sleeved on the outside of the positioning rod 19.

[0041] Please refer to Figure 8 Simultaneously, the two sets of handle plates 17 are pulled to move away from the first discharge pipe 4. During the process of pulling the handle plates 17, the handle plates 17 will drive the limiting plates 16 to move synchronously. Under the support of the second spring 20, the two sets of limiting plates 16 always tend to move away from each other, which can ensure that the shorter plate of the limiting plate 16 is always in contact with the inside of the handle plate 17. Therefore, the movement of the limiting plate 16 will drive the screen plate 11 to move as a whole. Until the screen plate 11 moves to the point where its outer ring surface is in contact with the inner ring surface of the first discharge pipe 4, the first spring 18 is also squeezed and compressed at the same time.

[0042] In Example 4, based on Example 3, a magnet 26 is fixedly installed on the top surface of the screen plate 11, and a magnet 27 is fixedly installed on the bottom of the fixed platform 7. There are three sets of magnets 27, which are fixed adjacent to each other. The middle set of magnets 27 attracts magnet 26, and the magnets 27 on the left and right sides of the middle set of magnets 27 repel magnet 26. There are four sets of magnets 26, which are arranged in a ring array about the center of the screen plate 11.

[0043] Please refer to Figure 7-10 It is known that the movement of the limiting plate 16 will drive the screen plate 11 to move as a whole. During the movement of the screen plate 11, the magnet 26 at the top of the screen plate 11 will move closer to the magnet 27. After the magnet 26 and the magnet 27 attract each other, they will be attracted together. Conversely, when the magnet 26 moves closer to the magnet 27, they will move away from each other. During the entire operation of the screen plate 11, the screen plate 11 will realize the up-and-down undulating motion trajectory.

[0044] In Example 5, based on Example 4, the dustproof assembly includes a top holding ring 22 and a rubber sheet 23. The top of the screen plate 11 has a top opening groove 21, which is a T-shaped annular plate-like groove structure. The top opening groove 21 communicates with the top of the screen plate 11 and the handle plate 17. The top holding ring 22 is a T-shaped annular plate that movably fits within the top opening groove 21. The rubber sheet 23 is a triangular annular plate-like structure that is fixed to the upper surface of the top holding ring 22 and movably fits against the bottom of the fixing platform 7.

[0045] During the movement of the screen plate 11, there is a certain gap between the top of the screen plate 11 and the bottom of the fixed platform 7. When the material is screened through the screening port 25, the rubber sheet 23 can effectively prevent dust from drifting into the limiting component and affecting the use of the limiting component and the collision component. At the same time, the rubber sheet 23 will have a certain contact with the bottom of the second magnet 27. At that time, the rubber sheet 23 is relatively soft, so it will not affect the contact between the first magnet 26 and the multiple sets of second magnets 27.

[0046] In Example 6, based on Example 3, the screen plate 11 is disassembled. At the same time, the two sets of handle plates 17 are squeezed until they are pressed together. When the two sets of handle plates 17 are pressed together, the shorter plate of the limiting plate 16, which is movably pressed into the side groove 28, will be at the opening where the side groove 28 communicates with the outside. At this time, the two sets of handle plates 17 are pulled away from the first discharge pipe 4 to disengage the spiral blade 6 from the side groove 28. At this time, the screen plate 11 has no external structural support and will fall out of the first discharge pipe 4 under its own weight. This allows for deep cleaning of the screen plate 11, preventing material dust from adhering to the surface of the screening port 25, and facilitating smoother screening of materials in the future.

[0047] The working principle and usage process of this invention are as follows: Material is fed into the inlet 2 and falls into the screw conveyor screen 1. The motor 3 is started, driving the screw blades 6 to rotate, thus conveying the material. When the material reaches the top of the first discharge pipe 4, smaller diameter materials fall through the screening port 25 to the next material to be processed, achieving preliminary screening. Larger particles or impurities are then conveyed to the second discharge pipe 5 for output. Simultaneously, pulling the two sets of handle plates 17 moves them away from the first discharge pipe 4. During this process, the handle plates 17 drive the limiting plates 16 to move synchronously. Supported by the second spring 20, the two sets of limiting plates 16 always tend to move away from each other. This ensures that the shorter plate of the limiting plate 16 is always in contact with the internal movement of the handle plate 17. Therefore, the movement of the limiting plate 16 will drive the screen plate 11 to move as a whole. When the screen plate 11 moves to the point where its outer ring surface is in contact with the inner ring surface of the first discharge pipe 4, the spring 18 is also compressed. It is known that the movement of the limiting plate 16 will drive the screen plate 11 to move as a whole. During the movement of the screen plate 11, the magnet 26 at the top of the screen plate 11 will move closer to the magnet 27. After the magnet 26 and the magnet 27 attract each other, they will be attracted together. Conversely, when the magnet 26 moves closer to the magnet 27, they will move away from each other. During the entire operation of the screen plate 11, the screen plate 11 will fluctuate up and down. The movement trajectory; therefore, during the process of pulling the handle plate 17, the screen plate 11, under its fluctuation, can shake the material on its surface, preventing material accumulation and reducing the feeding speed; finally, when the handle plate 17 is released, the compressed spring 18 will spring out, and the center of the screen plate 11 will also move back to its original position. When the screen plate 11 returns to its original position, the magnet 26 and the three sets of magnets 27 will re-contact continuously once, generating fluctuation again. During the back-and-forth movement of the screen plate 11, the screen plate 11 can achieve two vibrations, thereby fully shaking the material on the surface of the screen plate 11. Thus, during the process of pulling the handle plate 17, the screen plate 11, under its fluctuation, can The material on its surface is shaken to prevent material accumulation and reduce the feeding speed. Finally, the handle plate 17 is released, the compressed spring 18 will spring out, and the center of the screen plate 11 will move back to its original position. When the screen plate 11 returns to its original position, the magnet 26 and the three sets of magnets 27 will re-contact continuously once, generating vibration again. During the back-and-forth movement of the screen plate 11, the screen plate 11 can achieve two vibrations, thereby fully shaking the material on the surface of the screen plate 11, thus preventing the nano-sized particles of fruit and vegetable powder containing powder from clogging the screen plate 11, so that the material can be screened out more smoothly from the screening port 25.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations 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.

Claims

1. A nanoscale particle size control device for fruit and vegetable powder, comprising a first discharge pipe (4), the first discharge pipe (4) being fixedly connected to the outer bottom of a screw conveyor screener (1), an ultrafine pulverizer (30) being fixedly connected to the lower bottom of the first discharge pipe (4), and the top of the first discharge pipe (4) penetrating the interior of the screw conveyor screener (1), characterized in that: Inside the first discharge pipe (4), a screen plate (11) is movably fitted. A collision component is movably inserted into the side wall of the first discharge pipe (4). A limiting component is slidably connected inside the collision component, and one end of the limiting component is movably inserted into the outer side wall of the screen plate (11). A dust-proof component is movably fitted on the top of the screen plate (11), and the top of the dust-proof component is movably fitted with the bottom of the fixed table (7). The fixed table (7) is fixedly connected to the inner ring surface of the first discharge pipe (4); The collision component includes a mounting rod (13), a rubber strip (14), a first spring (18), a positioning rod (19), and an auxiliary plate (29). The mounting rod (13) has a "T"-shaped columnar structure. The mounting rod (13) is movably inserted into the movable opening (9). One end of the mounting rod (13) is located inside the first discharge pipe (4). The auxiliary plate (29) is fixedly connected to one end of the mounting rod (13), and the auxiliary plate (29) is fitted to the outer ring surface of the screen plate (11). The rubber strip (14) has an annular structure with a semi-circular cross-section. The rubber strip (14) is fixedly connected to the outer side of the mounting rod (13), and the rubber strip (14) is located between the mounting rod (13) and the outer ring surface of the first discharge pipe (4). Two sets of collision components are provided, and the two sets of collision components are symmetrically distributed about the center of the first discharge pipe (4). A through positioning groove (15) is provided on the side surface of the mounting rod (13). The positioning rod (19) has a circular columnar structure. The two ends of the positioning rod (19) are respectively fixed to the upper top surface and the lower bottom surface of the positioning groove (15). The first spring (18) is fixed between one side of the auxiliary plate (29) and the inner ring surface of the first discharge pipe (4), and the first spring (18) is sleeved on the outer ring surface of the mounting rod (13). The limiting component includes a limiting plate (16) and a handle plate (17). The limiting plate (16) has an "L"-shaped plate. The handle plate (17) has a "匚"-shaped plate. The open end of the handle plate (17) is fixedly connected to the top surface of the longer plate of the limiting plate (16). The limiting plate (16) is slidably connected in the positioning groove (15). The central horizontal plate and the adjacent vertical plate of the handle plate (17) are slidably connected in the limiting groove (10), and the shorter plate of the limiting plate (16) is movably fitted in the side groove (28). The side groove (28) is provided on the outer ring surface of the screen plate (11). The side groove (28) has a "T"-shaped plate-like groove. A through hole (24) penetrating the limiting plate (16) is provided on the top of the limiting plate (16). The positioning rod (19) passes through the through hole (24). Two sets of limiting components are provided, and the two sets of limiting components are symmetrically distributed about the center of the positioning rod (19). A second spring (20) is provided between the two sets of limiting components, and the second spring (20) is sleeved on the outer side of the positioning rod (19).

2. The nanoscale particle size control device for fruit and vegetable powder according to claim 1, characterized in that: A motor (3) is installed on one side of the spiral conveyor screen (1). The rotating end of the motor (3) is fixedly connected to a spiral blade (6), and the spiral blade (6) is laterally connected to the inner wall of the spiral conveyor screen (1). A feed inlet (2) is fixedly installed on the top of the outer side of the spiral conveyor screen (1). The bottom of the feed inlet (2) penetrates the interior of the spiral conveyor screen (1). A second discharge pipe (5) is fixedly installed on the bottom of the outer side of the spiral conveyor screen (1). The top of the second discharge pipe (5) penetrates the interior of the spiral conveyor screen (1). The first discharge pipe (4) has an annular tubular structure.

3. The nanoscale particle size control device for fruit and vegetable powder according to claim 2, characterized in that: The inner ring surface of the first discharge pipe (4) is fixedly connected to a guide plate (8). The guide plate (8) has an arc-shaped plate structure. The outer ring surface of the screen plate (11) is fixedly connected to a guide block (12). The guide block (12) is in contact with the inner ring surface of the guide plate (8). There are two sets of guide blocks (12). The two sets of guide blocks (12) are symmetrically distributed about the center of the screen plate (11). A magnet (26) is fixedly installed on the top surface of the screen plate (11). A magnet (27) is fixedly installed at the bottom of the fixed platform (7). There are three sets of magnets (27). The three sets of magnets (27) are fixedly adjacent to each other. The middle set of magnets (27) attracts magnets (26). The magnets (27) on the left and right sides of the middle set of magnets (27) repel magnets (26). There are four sets of magnets (26). The four sets of magnets (26) are arranged in a ring array about the center of the screen plate (11).

4. The nanoscale particle size control device for fruit and vegetable powder according to claim 3, characterized in that: The top of the first discharge pipe (4) is evenly provided with multiple sets of screening ports (25), and the top surface of the screen plate (11) is in contact with the bottom surface of the fixed platform (7).

5. The nanoscale particle size control device for fruit and vegetable powder according to claim 4, characterized in that: The outer side wall of the first discharge pipe (4) is provided with a movable opening (9), which penetrates the interior of the first discharge pipe (4). The outer side wall of the first discharge pipe (4) is provided with a limiting groove (10), which is an "L"-shaped plate-like groove structure. The limiting groove (10) is connected to the movable opening (9), and the collision component is movably inserted into the movable opening (9).

6. The nanoscale particle size control device for fruit and vegetable powder according to claim 5, characterized in that: The dustproof component includes a top holding ring (22) and a rubber sheet (23). The top of the side groove (28) is provided with a top opening groove (21). The top opening groove (21) is a ring-shaped plate with a "T"-shaped cross section. The top opening groove (21) is connected to the top of the side groove (28). The top holding ring (22) is a ring plate with a "T"-shaped cross section. The top holding ring (22) is movably fitted in the top opening groove (21). The rubber sheet (23) is a ring-shaped plate with a triangular cross section. The rubber sheet (23) is fixed on the top surface of the top holding ring (22), and the rubber sheet (23) is movably fitted to the bottom of the fixed platform (7).

7. A process for controlling the nanoscale particle size of fruit and vegetable powder, characterized in that: The control process of the nano-sized particle size control device for fruit and vegetable powder described in claim 6 is as follows: Step 1: The material is fed into the feed inlet (2), and the material will fall into the interior of the screw conveyor screen (1). The motor (3) is started to drive the screw blades (6) to rotate as a whole, thereby driving the material to be conveyed. When the material is conveyed to the top of the first discharge pipe (4), the material with a smaller diameter will fall through the screening port (25) to the next material to be processed, thus achieving preliminary screening. The larger particles or impurities will continue to be conveyed to the second discharge pipe (5) for output. Step 2: The movement of the limiting plate (16) will drive the screen plate (11) to move as a whole. During the movement of the screen plate (11), the magnet 1 (26) on the top of the screen plate (11) will move closer to the magnet 2 (27). After the magnet 1 (26) and the attracted magnet 2 (27) move closer together, the magnet 1 (26) will move closer to the magnet 2 (27) to the screen plate (11). When magnets attract each other, magnets 1 (26) will move away from magnets 2 (27) which repel each other. During the entire operation of the screen plate (11), the screen plate (11) will move up and down. Step 3: Release the handle plate (17), the compressed spring 1 (18) will spring out, and the center of the screen plate (11) will move back to its original position. When the screen plate (11) returns to its original position, magnet 1 (26) and the three sets of magnets 2 (27) will come into contact again and generate fluctuations. During the back and forth movement of the screen plate (11), the screen plate (11) can vibrate twice, thereby fully shaking the material on the surface of the screen plate (11) to avoid the material from being blocked at the screen plate (11) and to allow the material to be screened out from the screening port (25) and enter the ultra-fine pulverizer (30) for secondary screening.

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