A raw material multi-stage conveying device for millet oil production and a conveying method thereof

Abstract

The application discloses a millet oil production raw material multistage conveying equipment and a conveying method thereof, which comprises a conveyor one and a conveyor two, wherein the conveyor two is located below the conveyor one and is distributed at 90 degrees with the conveyor one, a grading part for removing impurities and screening the unhulled millet is fixedly arranged on the conveyor one, a collecting part for collecting the removed impurities such as chaff, straw and shriveled grains in the millet is arranged on the grading part, and a buffer part for slowing down the flow rate of the millet during the process of removing impurities and screening is arranged in the grading part; in the application, the integration of the multiple processes of impurity removal, buffering and grading can be realized through the grading part, the grading box is matched with the conveyor distributed at 90 degrees, the raw material purification and particle size screening are completed in a compact space, the equipment connection loss is reduced, and the millet after grading can be prevented from being mixed through the independent channel design of the different aperture screening holes and the corresponding partition plates.

Description

Technical Field

[0001] This invention relates to the technical field of conveying equipment for millet oil production, specifically a multi-stage conveying device and method for raw materials in millet oil production. Background Technology

[0002] Millet oil is mainly produced from millet, which is rich in oil and is the core raw material for extracting millet oil. In the industrial production of millet oil, multi-stage conveying equipment is a key infrastructure connecting the pretreatment, storage and processing of raw materials. The efficient transmission of raw materials and the connection of processes are achieved through the combination of different equipment. Belt conveyors are common millet conveying equipment. They are composed of components such as a ring conveyor belt, idlers and drive drums. They have a high conveying capacity and can transport a large amount of raw materials over long distances.

[0003] When processing millet raw materials, existing multi-stage conveying equipment relies entirely on independent equipment to complete the impurity removal and grading processes. These devices need to be connected by long-distance pipelines or conveyor belts. Due to their independent functions, they often have layout problems such as height differences and many turns. In addition, the power systems of the decentralized equipment are independent, and manual adjustment of the speed of each device is required when connecting them. Slight mismatch will cause material blockage and further aggravate the loss of raw materials. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing multi-stage conveying equipment relies entirely on independent devices for impurity removal and grading processes when processing millet raw materials. These devices need to be connected by long-distance pipelines or conveyor belts, and due to their independent functions, they often have layout problems such as height differences and many turns. In addition, the power systems of the decentralized devices are independent, and manual adjustment of the speed of each device is required when connecting them. Slight mismatch can cause material blockage and further aggravate raw material loss. The invention provides a multi-stage conveying device for raw materials in millet oil production.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage conveying device for raw materials in millet oil production, comprising: a conveyor 1 and a conveyor 2, wherein the conveyor 2 is located below the conveyor 1 and the conveyor 2 is distributed at a 90-degree angle to the conveyor 1, a grading component for removing impurities and screening hulled millet is fixedly installed on the conveyor 1, a collecting component for collecting the impurities removed from the millet is installed on the grading component, and a buffer component is installed inside the grading component to slow down the flow rate of the millet during the removal of impurities and screening process;

[0006] The grading component includes a grading box fixedly connected to the end of a first conveyor. The portion of the grading box located above the second conveyor has screening holes. A partition is fixedly connected to the bottom of the grading box, and the bottom of the partition abuts against the top of the conveyor belt of the second conveyor. An activation roller is rotatably connected inside the grading box, and the activation roller abuts against the bottom of the conveyor belt of the first conveyor. A drive wheel is fixedly connected to the end face of the activation roller. A fan wheel is rotatably connected inside the grading box, and a drive wheel is fixedly connected to the end face of the fan wheel. A synchronous belt meshes with the outer sides of the drive wheel and the drive wheel.

[0007] In this process, when conveyor one transports millet into the grading box, the rotating conveyor belt of conveyor one drives the activation roller to rotate synchronously. Through transmission wheel one and transmission wheel two, as well as the synchronous belt, the fan wheel rotates, thereby blowing the millet that has fallen into the grading box and removing the chaff, straw, and shriveled grains from the millet. After that, the millet falls to the bottom of the grading box and moves upward to conveyor two under the action of gravity. When it passes through the screening holes, the millet that meets the requirements falls onto the conveyor belt of conveyor two.

[0008] As a further embodiment of the present invention: the top of the grading box is provided with a feed inlet, the side of the grading box is provided with a removal port, a meshing block is fixedly connected to the conveyor belt of the first conveyor, a meshing groove is provided on the outer surface of the activation roller, the conveyor belt and the activation roller in the first conveyor are meshed and connected by the meshing block and the meshing groove, and a storage box is provided below the discharge port of the grading box, and the storage box is fixedly connected to the first conveyor.

[0009] As a further embodiment of the present invention: the collecting component includes a guide tube communicating with the impurity removal port, one end of the guide tube being connected to a storage box, and the storage box being fixedly connected to one end of the grading box.

[0010] As a further embodiment of the present invention: the bottom end of the storage box is provided with a discharge port, the inner wall of the discharge port is provided with a sealing groove, and a sealing plate is slidably inserted into the sealing groove.

[0011] As a further embodiment of the present invention: the buffer component includes a flow divider fan disposed at the feed inlet and rotatably connected to the classifier, a guide plate fixedly connected to the bottom of the inside of the classifier, a buffer fan 1 rotatably connected to the bottom of the inside of the classifier, the bottom end of the buffer fan 1 penetrating the bottom of the inside of the classifier and fixedly connected to a limit block.

[0012] As a further embodiment of the present invention: a second buffer fan is rotatably connected to the bottom of the grading box, and the bottom of the second buffer fan also penetrates the bottom of the grading box and is fixedly connected to a limit block. Multiple sets of the first and second buffer fans are provided, evenly distributed above the conveyor belt in the second conveyor, and the first and second buffer fans are staggered.

[0013] As a further embodiment of the present invention: a magnetic block is fixedly connected to the bottom of the grading box, and multiple sets of magnetic blocks are arranged and evenly distributed at the bottom of the grading box. Each set of magnetic blocks is magnetically attracted to a set of buffer fan one or buffer fan two.

[0014] A multi-stage conveying method for raw materials used in millet oil production includes the following steps:

[0015] S1. First, the conveyor belt drives the millet into the grading box inlet and into contact with the flow divider of the buffer. The flow divider rotates intermittently by gravity to achieve the weighted feeding. At the same time, the meshing block of the conveyor belt meshes with the meshing groove of the activation roller, driving the activation roller to rotate. The transmission wheel set drives the impeller to generate directional airflow, blowing light impurities such as rice husks toward the impurity removal port. The impurities fall into the storage box through the V-shaped guide tube for temporary storage. After the sealing plate is removed, they are discharged from the impurity discharge port.

[0016] S2. After that, the impurity-removed millet is guided to the center of the grading box by the figure-eight guide plate and flows to buffer fan one and buffer fan two. The fan blades rotate intermittently by the adsorption of magnetic blocks and iron blocks to slow down the flow rate. The millet moves along the inclined plane to the screening area and is classified by screening holes of different sizes. Millet that meets the particle size falls into the conveyor belt of conveyor two separated by J-shaped partitions.

[0017] S3. Finally, the millet that does not pass through the sieve holes continues to move along the inclined plane and falls into the storage box from the discharge port at the bottom of the grading box, completing the entire grading and sieving process.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, the grading component enables integrated processing of multiple processes, including impurity removal, buffering, and grading. Its J-shaped grading box, in conjunction with the conveyors distributed at 90 degrees, completes raw material purification and particle size screening within a compact space, reducing equipment connection losses. The independent channel design of screening holes with different apertures and corresponding partitions prevents millet from mixing after grading. Meshing transmission ensures synchronous operation of each component, significantly improving grading accuracy. At the same time, the adaptive flow regulation mechanism can avoid raw material congestion, providing raw materials that meet both purity and particle size standards for subsequent processes.

[0020] 2. In this invention, the collection component can be used to achieve directional transport of impurities by means of the arc transition structure of the V-shaped guide tube, which can effectively avoid blockage. With the layout of the storage box being lower than the impurity removal port, gravity flow is used to reduce power consumption. The combination of the L-shaped sealing plate and the sealing groove can flexibly control the timing of impurity discharge, reduce dust overflow, realize the centralized collection and convenient cleaning of impurities, and ensure the cleanliness of the production environment.

[0021] 3. In this invention, the gravity-triggered intermittent rotation of the diversion fan in the buffer component can realize the portioning of raw materials, avoiding insufficient processing caused by a one-time influx. The magnetic damping intermittent rotation of the buffer fan can slow down the flow rate of the raw materials. Combined with the uniform distribution of the figure-eight guide plate, sufficient time is reserved for impurity removal and screening. The staggered distribution of cross-shaped and X-shaped fan blades further improves the uniformity of raw material spreading, enhances the processing effect of subsequent processes, and has the adaptive flow rate adjustment capability to adapt to different feed rates. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 A cross-sectional view of the overall structure provided for this invention;

[0024] Figure 3 This is a schematic diagram of the conveyor provided by the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the grading component provided by the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the partition provided by the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the activation roller provided by the present invention;

[0028] Figure 7 Provided by the present invention Figure 6 A schematic diagram of the structure at point A;

[0029] Figure 8 A schematic diagram of the structure of the collection component provided by the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the enclosed groove provided by the present invention;

[0031] Figure 10 A schematic diagram of the structure of the buffer provided by the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of the magnetic block provided by the present invention;

[0033] Figure 12 Provided by the present invention Figure 11 A schematic diagram of the structure at point B.

[0034] In the diagram: 1. Conveyor 1; 2. Conveyor 2; 3. Grading component; 31. Grading box; 32. Feed inlet; 33. Impurity removal port; 34. Screening hole; 35. Partition plate; 36. Activation roller; 37. Drive wheel 1; 38. Synchronous belt; 39. Fan wheel; 310. Drive wheel 2; 311. Storage box; 312. Meshing block; 313. Meshing groove; 4. Collecting component; 41. Guide tube; 42. Impurity storage box; 43. Impurity discharge port; 44. Sealing groove; 45. Sealing plate; 5. Buffer component; 51. Diverter fan; 52. Guide plate; 53. Buffer fan 1; 54. Limiting block; 55. Buffer fan 2; 56. Magnetic block. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0037] Reference Figures 1 to 3In this embodiment of the invention, a multi-stage conveying device for raw materials used in millet oil production includes: a first conveyor 1 and a second conveyor 2, wherein the second conveyor 2 is located below the first conveyor 1 and is distributed at a 90-degree angle to the first conveyor 1. A grading component 3 is fixedly installed on the first conveyor 1 for removing impurities and screening the hulled millet. The grading component 3 is equipped with a collection component 4 for collecting impurities removed from the millet, such as chaff, straw, and shriveled grains. A buffer component 5 is installed inside the grading component 3 to slow down the flow rate of the millet during the removal of impurities and screening, so that the removal of impurities and screening of the millet is more thorough.

[0038] Reference Figures 4 to 7The grading component 3 includes a grading box 31 fixedly connected to the end of conveyor 1. The grading box 31 is J-shaped with a sloping bottom surface, the highest point being the side closest to the collecting component 4. A feed inlet 32 ​​is located at the top of the grading box 31, a removal port 33 is located on the side of the grading box 31, and a discharge port is located at the lowest point of the bottom of the grading box 31. Below the discharge port of the grading box 31 is a storage box 311 for collecting the millet discharged after screening. The storage box 311 is fixedly connected to conveyor 1. The portion of the grading box 31 located above conveyor 2 has screening holes 34. Multiple sets of screening holes 34 are evenly distributed above the conveyor belt area in conveyor 2, and the area containing the screening holes 34 is divided into four sections. The two higher areas have the same sieve hole diameter 34, and the two lower areas have the same sieve hole diameter 34. The diameter of the higher areas is smaller than that of the lower areas. A partition plate 35 is fixedly connected to the bottom of the grading box 31, and the bottom of the partition plate 35 abuts against the top of the conveyor belt of conveyor 2. The partition plate 35 is J-shaped and has five sets, dividing the conveyor belt of conveyor 2 into four sections. This prevents the millet sieved from being remixed on conveyor 2. An activation roller 36 is rotatably connected inside the grading box 31, and the activation roller 36 abuts against the bottom of the conveyor belt of conveyor 1. Engaging blocks 312 are fixedly connected to the conveyor belt of conveyor 1, and multiple sets of engagement blocks 312 are provided. The activation roller 36 is evenly distributed on the outer surface of the conveyor belt. Multiple sets of meshing grooves 313 are provided on the outer surface of the activation roller 36. In conveyor 1, the conveyor belt and activation roller 36 are connected to the meshing grooves 313 via meshing blocks 312. A drive wheel 37 is fixedly connected to the end face of the activation roller 36. A fan wheel 39 is rotatably connected inside the grading box 31. A drive wheel 310 is fixedly connected to the end face of the fan wheel 39. A synchronous belt 38 meshes with the outer sides of drive wheel 37 and drive wheel 310. The diameter of drive wheel 310 is smaller than that of drive wheel 37, causing drive wheel 37 to rotate at a higher speed than drive wheel 310. When conveyor 1 feeds millet from the inlet 32 ​​into the J-shaped grading box 31... At that time, the conveyor belt of conveyor 1 engages with the engagement groove 313 of the activation roller 36 through the engagement block 312, driving the activation roller 36 to rotate. Since the diameter of the transmission wheel 2 310 is smaller than that of the transmission wheel 1 37, and through the speed-increasing transmission of the transmission wheel 1 37, the synchronous belt 38 and the transmission wheel 2 310, the fan wheel 39 rotates at high speed to generate directional airflow. Utilizing the density difference, light impurities such as rice husks are blown from the impurity removal port 33 into the collection unit 4. After impurity removal, the millet passes through multiple sets of screening holes 34 at the bottom of the grading box 31, with different hole diameters set according to high and low areas. With the help of the conveyor belt of conveyor 2 2 separated by five sets of J-shaped partitions 35, the millet falls in areas according to particle size. The raw materials that do not pass the screening finally enter the storage box 311 from the discharge port, completing the multi-level grading.

[0039] The above solution achieves precise grading and anti-mixing through the grading component 3. The screening holes 34 with different apertures and the corresponding partitions 35 form independent channels, allowing millet of different particle sizes to be transported in separate areas. The meshing transmission ensures that all components operate synchronously, improving grading accuracy. The grading component 3 enhances the stability and durability of the equipment. The rigid transmission between the meshing block 312 and the meshing groove 313 prevents slippage. The arc-shaped blades of the impeller 39 enhance the airflow directionality. Wear-resistant parts reduce the maintenance frequency, providing raw materials that meet both purity and particle size standards for subsequent processes.

[0040] Reference Figures 8 to 9 The collecting component 4 includes a guide tube 41 connected to the impurity removal port 33. The guide tube 41 is V-shaped, and one end of the guide tube 41 is connected to a storage box 42. The storage box 42 is fixedly connected to one end of the grading box 31. The storage box 42 is positioned lower than the impurity removal port 33. The bottom of the storage box 42 has a discharge port 43. The inner wall of the discharge port 43 has a sealing groove 44. A sealing plate 45 is slidably inserted into the sealing groove 44. The sealing plate 45 is L-shaped. When the directional airflow generated by the impeller 39 removes light impurities such as chaff, straw, and shriveled grains from the millet... After being blown towards the impurity removal port 33 of the grading box 31, the impurities flow through the V-shaped guide tube 41 connected to the impurity removal port 33. The rounded transition corner of the guide tube 41 prevents impurities from accumulating. Since the position of the storage box 42 is lower than the impurity removal port 33, the impurities naturally fall into the storage box 42 for temporary storage under the gravity formed by the height difference. The discharge port 43 at the bottom of the storage box 42 is controlled by the sliding of the L-shaped sealing plate 45 in the sealing groove 44. When the impurities accumulate to a certain amount, the sealing plate 45 can be pulled out to discharge the impurities from the discharge port 43.

[0041] The above solution achieves directional transport and centralized collection of impurities through the collection component 4. The V-shaped guide tube 41 effectively prevents impurities from clogging during transport, ensuring a continuous and uninterrupted impurity removal process. The fixed connection between the storage box 42 and the grading box 31, and its lower placement below the impurity removal port 33, utilizes the principle of gravity flow to reduce power consumption and lower equipment operating costs. The cooperation between the L-shaped sealing plate 45 and the sealing trough 44 not only allows for flexible control of the timing of impurity discharge, preventing premature leakage and pollution, but also reduces dust spillage through the sealing design, improving the cleanliness of the production environment. The overall structure is compact and seamlessly connected with the grading component 3, improving impurity collection efficiency, preventing impurities from being mixed into the millet raw materials again, and ensuring the purity of raw materials in subsequent processing steps.

[0042] Reference Figures 10 to 12The buffer component 5 includes a diverter fan 51 located at the feed inlet 32 ​​and rotatably connected to the grading box 31. Millet falling into the grading box 31 initially accumulates on a set of blades of the diverter fan 51. As the accumulated millet gradually increases, the gravity of the millet causes the diverter fan 51 to rotate, allowing a portion of the millet to enter the grading box 31. A guide plate 52 is fixedly connected to the bottom of the grading box 31. Two sets of guide plates 52 are arranged in a V-shape at the bottom of the grading box 31. A buffer fan 53 is rotatably connected to the bottom of the grading box 31, with its bottom end penetrating the bottom of the grading box 31 and fixed in place. A limit block 54 is connected to the bottom of the grading box 31, and a second buffer fan 55 is rotatably connected to it. The bottom of the second buffer fan 55 also penetrates the bottom of the grading box 31 and is fixedly connected to the limit block 54. Multiple sets of buffer fans 53 and 55 are provided, evenly distributed above the conveyor belt in the second conveyor 2. The buffer fans 53 and 55 are staggered. The first buffer fan 53 is cross-shaped, and the second buffer fan 55 is X-shaped. Two sets of guide plates 52 are located on the side of the buffer fans, so that the millet falling into the grading box 31 first passes through the guide plates 52. The bottom of the grading box 31 is fixed. A magnetic block 56 is connected, and multiple sets of magnetic blocks 56 are evenly distributed at the bottom of the grading box 31. Each set of blades in each set of buffer fan 1 53 and buffer fan 2 55 has a set of iron blocks embedded at the bottom. When each set of blades in buffer fan 1 53 and buffer fan 2 55 passes the corresponding magnetic block 56 during rotation, the rotation stops. As the amount of millet increases, the magnetism is overcome and the rotation continues. When the millet enters the grading box 31 from the feed inlet 32, it first contacts the diversion fan 51 at the feed inlet 32. The millet accumulates on the blades of the diversion fan 51. When the gravity exceeds the rotational friction... When the force is applied, the diversion fan 51 rotates to achieve partial feeding. Then, the millet falls between the two sets of figure-eight guide plates 52 and is guided to the central area of ​​the grading box 31. It flows evenly to the cross-shaped buffer fan 1 53 and the X-shaped buffer fan 2 55 below. The buffer fan 1 53 and the buffer fan 2 55 are attracted to the magnetic block 56 at the bottom of the grading box 31 by the iron block at the bottom of the fan blade. In the initial state, they stop rotating and the millet accumulates on the fan blade until gravity overcomes the magnetic force and pushes the fan blade to continue rotating. This intermittent rotation slows down the flow rate, and the staggered distribution of multiple sets of buffer fans further prolongs the residence time of the millet in the screening area.

[0043] The above solution achieves intermittent feeding of millet through buffer component 5. The gravity-triggered rotation of the diverter fan 51 prevents a large influx of raw material at once, allowing processing time for subsequent impurity removal and screening. Buffer component 5 guides the millet evenly to the screening area, and the gathering effect of the figure-eight guide plate 52 makes the millet distribution more uniform. Combined with the staggered buffer fan 1 53 and buffer fan 2 55, it ensures full contact between the raw material and the screening holes 34, improving screening efficiency. Buffer component 5 enables precise control of flow rate. The magnetic damping of the magnetic block 56 and the iron block allows the buffer fan to automatically adjust its rotation rhythm according to the amount of raw material, adapting to different feed flow rates and avoiding insufficient screening due to excessive flow rate. Buffer component 5 reduces equipment operating losses. The intermittent rotation of the buffer fan reduces the impact of raw material on the inner wall of the grading box 31 and the screening holes 34, extending the service life of components. At the same time, it provides raw material with stable flow rate and uniform distribution for subsequent processes, ensuring grading accuracy and product quality.

[0044] The working principle of this invention is as follows: First, the conveyor belt of conveyor 1 operates, driving millet towards the grading box 31. Finally, the millet enters the J-shaped grading box 31 from the feed inlet 32 ​​at the top of the grading box 31. At this time, the millet first contacts the diverting fan 51 in the buffer 5. The blades of the diverting fan 51 are evenly radially distributed. Initially, one set of blades is located directly below the feed inlet 32. After the millet falls from the feed inlet 32, it naturally accumulates on this set of blades. As conveyor 1 continues to transport, the millet at the feed inlet 32 ​​is continuously replenished, and the accumulation on the blades gradually increases. When the weight of the accumulated millet exceeds the frictional force of the rotating blades, the diverting fan 51 rotates around its axis. The rotation angle is just enough to move the next set of blades directly below the feed inlet 32. The fan blades that originally carried the millet are tilted towards the inside of the grading box 31, causing the millet to fall into the box in batches. This intermittent feeding initially reduces the flow rate and prevents a large influx at once from causing insufficient subsequent processing. At the same time, the conveyor belt of conveyor 1 operates continuously under the drive of the motor. Multiple sets of trapezoidal meshing blocks 312, evenly distributed on its surface, move with the conveyor belt and precisely mesh with the meshing grooves 313 on the outer surface of the activation roller 36 inside the grading box 31, ensuring no slippage during contact. The activation roller 36 is thus driven to rotate. Its rotating shaft is connected to the side wall of the grading box 31 through bearings. The rotation speed is proportional to the operating speed of the conveyor belt of conveyor 1. A transmission wheel 37 is fixed at the end of the activation roller 36 away from the conveyor belt. It is connected to the fan wheel 39 by a synchronous belt 38. The second drive wheel 310 is connected. Because the diameter of the second drive wheel 310 is smaller than that of the first drive wheel 37, when the activation roller 36 rotates, the rotational speed of the second drive wheel 310 is higher than that of the first drive wheel 37. The impeller 39 consists of four arc-shaped blades. When it rotates, it generates a directional airflow. The airflow direction is directly towards the impurity removal port 33 at the side end of the grading box 31. Light impurities such as chaff, straw, and shriveled grains mixed in the millet gain horizontal kinetic energy under the action of the airflow and move towards the impurity removal port 33. These impurities eventually enter the connected guide pipe 41 through the impurity removal port 33. The guide pipe 41 is V-shaped with rounded corners to ensure that impurities are not retained. Because the position of the storage box 42 is lower than that of the impurity removal port 33, the impurities in the guide pipe 41 fall naturally into the storage box 42 by gravity due to the height difference. The discharge port 43 is opened and closed by sliding an L-shaped sealing plate 45 within a sealing groove 44. Impurities are temporarily stored there until the sealing plate 45 is removed, at which point they are discharged from the discharge port 43. After impurity removal, the millet continues to move downwards into the grading box 31 under gravity. It first contacts two sets of V-shaped guide plates 52, which form a gradually narrowing channel, guiding the millet to the central area of ​​the grading box 31. This ensures even flow to the lower buffer fan 1 53 and buffer fan 2 55. Initially, one set of fan blades is located directly above the magnetic block 56. The block is attracted by the magnetic force, and the fan blades stop rotating, accumulating on the blades. The millet continues to rotate until the fan blades overcome the magnetic force, moving the millet towards the bottom of the grading box 31. This intermittent rotation further reduces the flow rate.To allow sufficient time for subsequent grading and screening, millet, under the action of the buffer fan, slowly moves downwards along the inclined surface of the grading box 31, passing through the area where the screening holes 34 are located. This area is divided into four rectangular areas. The screening holes 34 of the two higher areas are smaller than those of the two lower areas. The millet first passes through the higher areas, allowing millet with smaller holes to fall onto the conveyor belt of conveyor 2 through the screening holes 34. The remaining millet continues to move and enters other screening areas, allowing millet with smaller holes to fall onto the conveyor belt of conveyor 2 through the screening holes 34. The five sets of J-shaped baffles 35 at the bottom of the grading box 31... The conveyor belt of conveyor 2 is divided into four corresponding areas. The bottom of the partition plate 35 is in close contact with the top of the conveyor belt to ensure that millet falling from different screening holes 34 is transported in separate areas to prevent mixing. Millet that does not pass through any screening hole 34 continues to move along the inclined plane to the discharge port at the lowest point of the grading box 31, and finally falls into the storage box 311 below, completing the entire grading and screening process. Through the grading component 3, the integrated processing of multiple processes such as impurity removal, buffering, and grading can be realized. Its J-shaped grading box 31, in conjunction with the conveyors distributed at ninety degrees, completes the purification of raw materials and particle size screening in a compact space, reducing the risk of contamination. The equipment connection loss is reduced by the independent channel design of the screening holes 34 with different apertures and the corresponding baffles 35, which prevents millet from mixing after grading. The meshing transmission ensures that all components operate synchronously, significantly improving grading accuracy. At the same time, the adaptive flow regulation mechanism can avoid raw material congestion, providing raw materials that meet both purity and particle size standards for subsequent processes. Through the collection component 4, the arc transition structure of the V-shaped guide tube 41 can achieve directional conveying of impurities, effectively avoiding blockage. With the layout of the impurity storage box 42 being lower than the impurity removal port 33, gravity flow is used to reduce power consumption. The cooperation between the L-shaped closing plate 45 and the closing groove 44 can... Flexible control of impurity discharge timing reduces dust overflow, enabling centralized collection and convenient cleaning of impurities and ensuring a clean production environment. The gravity-triggered intermittent rotation of the diversion fan 51 in the buffer component 5 allows for portioned material feeding, preventing insufficient processing caused by a single influx. The magnetic damping intermittent rotation of the buffer fan slows the material flow rate. Combined with the uniform material distribution of the figure-eight guide plate 52, sufficient time is reserved for impurity removal and screening. The staggered distribution of cross-shaped and X-shaped fan blades further improves the uniformity of material spreading, enhancing the processing effect of subsequent processes. Furthermore, its adaptive flow rate adjustment capability accommodates different feed rates.

[0045] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage feed conveying apparatus for millet oil production, comprising: Conveyer one (1) and conveyer two (2), wherein, conveyer two (2) is below conveyer one (1), and conveyer two (2) is ninety degrees with conveyer one (1), characterized by, the fixed setting of the conveyer one (1) is equipped with the grading piece (3) that removes the impurity and screens to the millet of shelling, the grading piece (3) is equipped with the collection piece (4) that removes the impurity in millet and is collected, the grading piece (3) is equipped with the buffer piece (5) that slows down the flow rate in the process of millet removing the impurity and screening; The grading piece (3) includes a grading box (31) fixedly connected to the end of the conveyer one (1), the grading box (31) is provided with a screening hole (34) above the conveyer two (2), the bottom end of the grading box (31) is fixedly connected with a partition (35), and the bottom end of the partition (35) abuts with the top end of the conveyer two (2) conveying belt, the grading box (31) is rotatably connected with an activation roller (36), the activation roller (36) abuts with the bottom end of the conveyer one (1) conveying belt, the end surface of the activation roller (36) is fixedly connected with a transmission wheel one (37), the grading box (31) is rotatably connected with a wind wheel (39), the end surface of the wind wheel (39) is fixedly connected with a transmission wheel two (310), the outer side of the transmission wheel one (37) and the transmission wheel two (310) is engagedly connected with a synchronous belt (38); When the conveyer one (1) conveys the millet and brings the millet into the grading box (31), the rotating conveyer one (1) conveying belt drives the activation roller (36) to rotate synchronously, and drives the wind wheel (39) to rotate through the transmission wheel one (37) and the transmission wheel two (310) and the synchronous belt (38), so as to blow the millet falling into the grading box (31) and blow off the chaff, straw and shriveled grain from the millet, then the millet falls into the bottom end of the grading box (31) and moves to the top of the conveyer two (2) under the action of gravity, when passing through the screening hole (34), the millet meeting the requirements falls on the conveyer two (2) conveying belt through the screening hole (34); The buffer piece (5) includes a shunt fan (51) disposed in the feed inlet (32) and rotatably connected with the grading box (31), the inside bottom end of the grading box (31) is fixedly connected with a guide plate (52), the inside bottom end of the grading box (31) is rotatably connected with a buffer fan one (53), the bottom end of the buffer fan one (53) penetrates the inside bottom end of the grading box (31) and is fixedly connected with a limiting block (54); The inside bottom end of the grading box (31) is rotatably connected with a buffer fan two (55), and the bottom end of the buffer fan two (55) also penetrates the inside bottom end of the grading box (31) and is fixedly connected with a limiting block (54), the buffer fan one (53) and the buffer fan two (55) are all provided with multiple groups and are evenly distributed above the conveying belt of the conveyer two (2), and the buffer fan one (53) and the buffer fan two (55) are staggered. The bottom end of the grading box (31) is fixedly connected with magnetic blocks (56), the magnetic blocks (56) are provided in multiple groups and are uniformly distributed at the bottom end of the grading box (31), and each group of magnetic blocks (56) is magnetically adsorbed with a group of buffer fan one (53) or buffer fan two (55).

2. The multi-stage conveying device for raw materials for producing millet oil according to claim 1, characterized in that, The top end of the grading box (31) is provided with a feeding port (32), the side end of the grading box (31) is provided with a dedusting port (33), the conveying belt in the conveyor one (1) is fixedly connected with an engaging block (312), the outer cylindrical surface of the activating roller (36) is provided with an engaging groove (313), the conveying belt in the conveyor one (1) and the activating roller (36) are connected in engagement through the engaging block (312) and the engaging groove (313), and the grading box (31) is provided below the discharge port with a storage box (311), and the storage box (311) is fixedly connected with the conveyor one (1).

3. The multi-stage conveying device for raw materials for producing small bean oil according to claim 2, characterized in that, The collecting piece (4) comprises a guide pipe (41) in communication with the dedusting port (33), and one end of the guide pipe (41) is connected in penetration with a storage box (42), and the storage box (42) is fixedly connected with one end of the grading box (31).

4. The multi-stage conveying device for raw materials for producing millet oil according to claim 3, characterized in that, The bottom end of the storage box (42) is provided with a dedusting port (43), the inner wall of the dedusting port (43) is provided with a closed groove (44), and the closed groove (44) is slidably connected with a closing plate (45).

5. The multi-stage conveying method of a raw material for producing small millet oil according to claim 4, characterized in that, The method comprises the following steps: S1. First, the conveyor one (1) drives the millet from the feeding port (32) of the grading box (31) to contact the shunt fan (51) of the buffer piece (5), the shunt fan (51) is triggered to rotate intermittently by gravity to realize the sub-quantity discharging, at the same time, the engaging block (312) of the conveying belt of the conveyor one (1) is engaged with the engaging groove (313) of the activating roller (36) to drive the activating roller (36) to rotate, the transmission wheel set drives the wind wheel (39) to generate directional airflow, the chaff and other light impurities are blown to the dedusting port (33), the impurities fall into the storage box (42) for temporary storage through the V-shaped guide pipe (41), and are discharged from the dedusting port (43) after the closing plate (45) is pulled out; S2. Then, the millet after impurity removal is guided to the center of the grading box (31) through the eight-shaped guide plate (52), flows to the buffer fan one (53) and the buffer fan two (55), the fan blades are intermittently rotated through the adsorption of the magnetic blocks (56) and the iron blocks to slow down the flow rate, the millet moves along the inclined surface to the screening area, is graded through the screening holes (34) with different high-low aperture, and the millet meeting the particle size falls into the conveying belt of the conveyor two (2) separated by the J-shaped partition plate (35); S3. Finally, the millet not passing through the screening holes (34) continues to move along the inclined surface, falls into the storage box (311) from the bottom end discharge port of the grading box (31), and the whole grading and screening process is completed.

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