Ganoderma lucidum powder airflow screening device and method

Abstract

The invention relates to the technical field of ganoderma lucidum powder screening devices, in particular to a white ganoderma lucidum powder airflow screening device and method. According to the technical scheme, the device comprises a screening barrel and a sealing plate fixedly connected to the upper end of the screening barrel, the upper end of the sealing plate is fixedly connected with a stock bin, the bottom end of the screening plate is connected with a cleaning pipe in a penetrating mode, and the bottom end of the screening barrel is connected with a first discharging pipe through a conical cover; and the cleaning auxiliary mechanism is used for controlling opening and closing of the port of the cleaning pipe. The cleaning auxiliary mechanism is arranged at the upper end opening of the cleaning pipe, the blocking mechanisms are arranged at the bottom ends of the two discharging openings, after the connecting shaft rotates by 90 degrees, the two discharging openings can be closed at the same time, the end opening of the cleaning pipe is opened, and coarse materials on the inner wall of the bottom end of the screening plate are discharged through the cleaning pipe under the action of airflow; the effect that fine materials and coarse materials are thoroughly separated and discharged is achieved, the screening efficiency is not affected, the screening plate is kept in a good screening state, and the maintenance rate of the screening plate is remarkably reduced.

Description

Technical Field

[0001] This application relates to the technical field of Ganoderma lucidum powder sieving devices, and in particular to an airflow sieving device and method for white-fleshed Ganoderma lucidum powder. Background Technology

[0002] White-fleshed Ganoderma lucidum powder is made from ground white-fleshed Ganoderma lucidum and has the effects of replenishing qi, calming the mind, and improving immunity. The ground powder needs to be sieved before being packaged to achieve a uniform fineness. Many types of sieving devices are available, including vibrating sieving devices and airflow sieving devices. Among these, airflow sieving devices offer high sieving efficiency and are the preferred method for sieving Ganoderma lucidum powder.

[0003] The existing Ganoderma lucidum powder airflow sieving device consists of a sieving plate, airflow pipe, and powder discharge pipe installed in the device. When sieving the powder, the powder to be sieved is first added to the material box. An airflow is generated by a negative pressure fan or centrifugal fan to send the material into the sieving plate. The material is subjected to the airflow in the sieving plate, so the finer material is carried away by the airflow, while the coarser material is left on the sieving plate. It has the advantages of high output, precise fineness, no dust and low noise.

[0004] However, existing airflow sieving devices still have the following drawbacks in the process of sieving Ganoderma lucidum powder:

[0005] First, it cannot quickly discharge the coarse material intercepted on the screening plate, and while discharging the coarse material, it will inevitably carry away some of the unscreened material that falls down.

[0006] Second, a small amount of coarse material may block the fine material screening holes on the screening plate, which will affect the screening effect over time and requires shutdown for handling.

[0007] Therefore, this application proposes an airflow sieving device and method for white Ganoderma lucidum powder. Summary of the Invention

[0008] The purpose of this application is to address the technical problems identified in the background section by proposing an airflow sieving device and method for white Ganoderma lucidum powder.

[0009] On the one hand, this application proposes:

[0010] A white-fleshed Ganoderma lucidum powder airflow sieving device includes a sieving cylinder and a sealing plate fixedly connected to its upper end, wherein a material hopper is fixedly connected to the upper end of the sealing plate, and further includes:

[0011] A screening plate is installed on the inner wall of the screening cylinder, and a cleaning pipe is connected through the bottom end of the screening plate. The bottom end of the screening cylinder is connected to a discharge pipe through a conical cover.

[0012] A cleaning auxiliary mechanism is used to control the opening and closing of the cleaning pipe port;

[0013] A flow guide installed at the bottom of the sealing plate, the flow guide being perpendicular to the screening plate;

[0014] Two discharge ports are provided on the sealing plate, and a sealing mechanism is provided at the bottom of the discharge ports;

[0015] The servo motor located at the bottom of the draining component synchronously controls the sealing mechanism and the cleaning auxiliary mechanism through the connecting shaft at the output end of the servo motor, so that the opening and closing of the two discharge ports corresponds synchronously with the opening and closing of the cleaning pipe port.

[0016] Preferably, the upper end of the hopper is covered with a cover plate, and an opening and closing cover is rotatably connected to the cover plate;

[0017] A guide column is fixedly connected to the upper middle part of the sealing plate, and the two discharge ports are located on the outer side of the bottom end of the guide column, so that the material in the hopper can be guided through the guide column.

[0018] Preferably, it also includes an airflow pipe that passes through the cover plate, the guide column and the sealing plate, and extends into the screening cylinder;

[0019] The flow guide includes an air hood fixedly connected to the bottom end of the sealing plate. The air hood is located inside the two discharge ports, and a number of air outlets are provided at the outer edge of the bottom end of the air hood.

[0020] An air guide column is fixedly connected to the axial center of the bottom inner wall of the air hood. The air guide column is located directly below the output end of the airflow pipe and is used to guide the gas input from the airflow pipe to several air outlets.

[0021] Preferably, the cleaning auxiliary mechanism includes:

[0022] An insert plate is inserted into the upper port of the cleaning tube, and a connecting block is fixedly connected to the upper end of the insert plate. The connecting block is conical.

[0023] A connecting rod is fixedly connected to the upper end of the connecting block. A transmission plate is fixedly connected to the upper end of the connecting rod. A transmission cylinder and a pair of guide rods are connected to the upper end of the transmission plate. Both guide rods slide through the bottom end of the air cover, and a limit plate is fixedly connected to the upper end of both guide rods.

[0024] Preferably, a drive shaft is fixedly connected to the bottom end of the connecting shaft, an inclined groove is provided on the side wall of the drive shaft, and a sliding ball is fixedly connected to the inner wall of the drive cylinder, the sliding ball being slidably connected in the inclined groove.

[0025] Preferably, the sealing mechanism includes an annular groove formed at the bottom end of the sealing plate, the annular groove being located directly below the two discharge ports;

[0026] Two arc-shaped plates are slidably connected inside the annular groove, and the arc-shaped plates are larger than the arc-shaped cross-section of the discharge port;

[0027] The bottom ends of the two arc-shaped plates are fixedly connected to transmission rods, and the bottom ends of the two transmission rods are fixedly connected to a connecting plate, which is fixedly sleeved on the side wall of the connecting shaft.

[0028] Preferably, the output end of the cleaning pipe is fixedly connected to a discharge pipe two, which penetrates the side wall of the screening cylinder and extends to the outside of the screening cylinder.

[0029] Preferably, a support ring is fixedly connected to the inner wall of the screening cylinder, and the screening plate is fixedly installed on the upper end of the support ring;

[0030] The sieve plate is conical, and the diameter of the upper end of the sieve plate is larger than the diameter of the lower end.

[0031] Preferably, a pair of support blocks are fixedly connected to the upper end of the cover plate, and the two support blocks are set as inclined surfaces on the side near the opening and closing cover to support the opening and closing cover when it is opened;

[0032] Two support blocks are located on both sides of the airflow tube, and the inclined surfaces of the two support blocks are higher than the arc-shaped end of the airflow tube to prevent collision with the airflow tube when the cover is opened.

[0033] The airflow duct is connected to an external compressor.

[0034] On the other hand, this application proposes:

[0035] A method for airflow sieving of white Ganoderma lucidum powder includes the following steps:

[0036] S1: Add the material to be screened into the hopper and start the external compressor fan;

[0037] S2: The material in the hopper falls into the screening plate through two discharge ports. The airflow in the airflow pipe is blown towards the screening plate in a large area under the guidance of the flow guide. The fine powder material at the top of the screening plate falls to the bottom of the screening cylinder under the action of the airflow and is discharged through the discharge pipe.

[0038] S3: A small portion of coarse powder will remain inside the screening plate and concentrate at the bottom of the inner wall of the screening plate;

[0039] S4: After screening for a period of time, start the servo motor to make the output shaft of the servo motor rotate 90 degrees in the forward direction. At this time, the connecting shaft rotates 90 degrees. The connecting shaft drives the sealing mechanism to block the two discharge ports. At this time, the material hopper stops discharging. The connecting shaft synchronously drives the cleaning auxiliary mechanism to open the upper port of the cleaning pipe. Under the action of airflow, the coarse powder material in the screening plate is discharged through the cleaning pipe and the discharge pipe.

[0040] S5: After the coarse powder material in the screening plate is discharged, the output shaft of the servo motor rotates 90 degrees in the opposite direction, so that the device returns to the screening state and continues to screen the material.

[0041] Compared with the prior art, this application has the following beneficial technical effects:

[0042] This application provides a flow guide at the bottom of the sealing plate, which can evenly guide the airflow in the airflow pipe to the top of the screening plate, so that the screening plate can be evenly subjected to the airflow. The screening plate is set in a conical shape, which can not only increase the screening area of ​​the airflow, but also prevent coarse materials from blocking the screening holes of the screening plate. The cleaning pipe is set at the bottom of the screening plate to facilitate the discharge of materials from the inner wall of the bottom of the screening plate.

[0043] By setting a cleaning auxiliary mechanism at the upper end of the cleaning pipe and a sealing mechanism at the bottom of the two discharge ports, the two discharge ports can be closed and the cleaning pipe port can be opened simultaneously after the connecting shaft rotates 90 degrees. Under the action of airflow, the coarse material on the inner wall of the bottom end of the screening plate is discharged through the cleaning pipe. When the coarse material is discharged, the material in the hopper will not fall, thus effectively preventing unscreened material from being discharged with the coarse material. This achieves the effect of completely separating and discharging fine and coarse materials without affecting the screening efficiency, keeping the screening plate in good screening condition. Compared with traditional airflow screening devices, this not only improves the screening efficiency but also significantly reduces the maintenance rate of the screening plate.

[0044] In this application, after the insert plate moves upward, the port of the cleaning pipe opens. Since the screening plate is conical with a downward-sloping arc surface on its inner wall, and the opening at the bottom of the screening plate is much larger than the screening holes on its side wall, the airflow will quickly blow the coarse material on the inner wall of the screening plate into the cleaning pipe, so that the screening plate returns to its original screening state. After the connecting shaft rotates 90 degrees in the opposite direction, the cleaning pipe is restored to its original state, the two discharge ports are opened, and the screening mode is immediately restored. The whole process is completed in a closed environment, which is efficient and environmentally friendly. Attached Figure Description

[0045] Figure 1 This is a three-dimensional diagram of an airflow sieving device for white-fleshed Ganoderma lucidum powder;

[0046] Figure 2 yes Figure 1 Front sectional view;

[0047] Figure 3 This is a top view of the silo in this application;

[0048] Figure 4 This is a schematic diagram of the bottom structure of the sealing plate in this application;

[0049] Figure 5 This is a schematic diagram of the connection structure between the sealing mechanism and the cleaning auxiliary mechanism in this application;

[0050] Figure 6 yes Figure 2 Enlarged structural diagram at point A in the middle;

[0051] Figure 7 yes Figure 2 Enlarged structural diagram at point B;

[0052] Figure 8 yes Figure 4 Enlarged structural diagram at point C;

[0053] Figure 9 This is a cross-sectional view of the transmission cylinder in this application.

[0054] Attached reference numerals: 1. Screening cylinder; 2. Sealing plate; 3. Hopper; 4. Cover plate; 5. Opening / closing cover; 6. Support block; 7. Discharge pipe one; 8. Discharge pipe two; 9. Feed outlet; 10. Guide column; 11. Airflow pipe; 12. Mounting plate; 13. Support ring; 14. Screening plate; 15. Cleaning pipe; 16. Conical cover;

[0055] 17. Drainage component; 171. Air hood; 172. Air outlet; 173. Air guide column;

[0056] 18. Sealing mechanism; 181. Annular groove; 182. Arc plate; 183. Transmission rod; 184. Connecting plate;

[0057] 19. Cleaning auxiliary mechanism; 191. Insert plate; 192. Connecting block; 193. Connecting rod; 194. Transmission plate; 195. Transmission cylinder; 196. Transmission shaft; 197. Inclined groove; 198. Guide rod; 199. Sliding ball;

[0058] 20. Servo motor; 21. Connecting shaft. Detailed Implementation

[0059] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0061] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present 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 the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0063] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0064] like Figures 1-9 As shown, this application proposes an airflow sieving device for white Ganoderma lucidum powder, comprising a sieving cylinder 1 and a sealing plate 2 fixedly connected to its upper end. An mounting plate 12 is fixedly installed on the side wall of the sieving cylinder 1, and the mounting plate 12 is fixedly connected to an external support. A hopper 3 is fixedly connected to the upper end of the sealing plate 2. The hopper 3 is conical, with its upper inner diameter larger than its lower inner diameter, allowing the material inside to be completely discharged downwards. Two discharge ports 9 are opened at the upper end of the sealing plate 2. The discharge ports 9 are arc-shaped and located on the inner side of the bottom end of the hopper 3. A cover plate 4 is provided on the upper end of the hopper 3. An opening / closing cover 5 is rotatably connected to the cover plate 4. A connector is provided at one end of the opening / closing cover 5, including a protrusion fixedly connected to the upper edge of the opening / closing cover 5. The protrusion is fixed to the cover plate 4 by bolts, facilitating opening and ensuring stability when closed. A guide column 10 is fixedly connected to the upper middle part of the sealing plate 2. The two discharge ports 9 are located on the outer side of the bottom end of the guide column 10. The guide column 10 is conical, thinner at the top and thicker at the bottom, and guides the material in the hopper 3 through the guide column 10.

[0065] A pair of support blocks 6 are fixedly connected to the upper end of the cover plate 4. The two support blocks 6 are set with inclined surfaces on the side near the opening and closing cover 5 to support the opening and closing cover 5 when it is opened. The two support blocks 6 are located on both sides of the airflow pipe 11, and the inclined surfaces of the two support blocks 6 are higher than the arc-shaped end of the airflow pipe 11 to prevent the opening and closing cover 5 from colliding with the airflow pipe 11 when it is opened, thus protecting the airflow pipe 11. The airflow pipe 11 is connected to an external compressor fan.

[0066] The system also includes a screening plate 14 installed on the inner wall of the screening cylinder 1. A support ring 13 is fixedly connected to the inner wall of the screening cylinder 1. The screening plate 14 is fixedly installed on the upper end of the support ring 13, and the outer ring of the screening plate 14 is fixedly connected to the upper end of the support ring 13 by screws. The screening plate 14 is conical, and the upper diameter of the screening plate 14 is larger than the lower diameter. The inner wall is a downwardly sloping arc surface, and the opening at the bottom of the screening plate 14 is much larger than the screening holes on its side wall. When discharging coarse material, the airflow will quickly blow the coarse material on the inner wall of the screening plate 14 down. A cleaning pipe 15 is connected through the bottom of the screening plate 14. The output end of the cleaning pipe 15 is fixedly connected to a discharge pipe 2 8. The discharge pipe 2 8 penetrates the side wall of the screening cylinder 1 and extends to the outside of the screening cylinder 1. The coarse material is transported through the cleaning pipe 15 into the discharge pipe 2 8 and finally discharged. The bottom end of the screening cylinder 1 is connected to the discharge pipe 7 via a conical cover 16, and the output end of the discharge pipe 7 is connected to an external receiving box.

[0067] The upper end of the cleaning pipe 15 is provided with a cleaning auxiliary mechanism 19, which is used to control the opening and closing of the cleaning pipe 15 port. When the cleaning pipe 15 is open, it is in screening state, and when the cleaning pipe 15 is closed, it is in coarse material discharge state.

[0068] In this application, a flow guide 17 is installed at the bottom end of the sealing plate 2. The flow guide 17 is perpendicular to the screening plate 14 and can uniformly guide the airflow in the airflow pipe 11 to the top of the screening plate 14.

[0069] Furthermore, a sealing mechanism 18 is provided at the bottom of the discharge port 9, which can intermittently seal the two discharge ports 9. A servo motor 20 is also included at the bottom of the guide member 17. The connecting shaft 21 at the output end of the servo motor 20 synchronously controls the sealing mechanism 18 and the cleaning auxiliary mechanism 19, ensuring that the opening and closing of the two discharge ports 9 corresponds synchronously with the opening and closing of the cleaning pipe 15. When the two discharge ports 9 are open, the corresponding cleaning pipe 15 is closed, indicating screening mode; when the two discharge ports 9 are closed, the corresponding upper port of the cleaning pipe 15 is open, indicating coarse material discharge mode (screening paused).

[0070] Specifically, it also includes an airflow pipe 11, which penetrates the cover plate 4, the guide column 10, and the sealing plate 2, and extends into the screening cylinder 1. (Refer to...) Figure 5 The guide component 17 includes an air hood 171 fixedly connected to the bottom end of the sealing plate 2. The air hood 171 is located inside the two discharge ports 9, and several air outlets 172 are provided at the outer edge of the bottom end of the air hood 171. A guide column 173 is fixedly connected to the axial center of the inner wall of the bottom end of the air hood 171. The guide column 173 is located directly below the output end of the airflow pipe 11. The guide column 173 is conical and is used to guide the gas input from the airflow pipe 11 to several air outlets 172, and then discharge it downwards to the screening plate 14.

[0071] Reference Figure 5 and Figure 6 The cleaning auxiliary mechanism 19 includes an insert plate 191 inserted into the upper port of the cleaning pipe 15. A connecting block 192 is fixedly connected to the upper end of the insert plate 191. The connecting block 192 is conical and can guide the coarse material during discharge, allowing it to slide smoothly downwards. A connecting rod 193 is fixedly connected to the upper end of the connecting block 192. A transmission plate 194 is fixedly connected to the upper end of the connecting rod 193. A transmission cylinder 195 and a pair of guide rods 198 are fixedly connected to the upper end of the transmission plate 194. Both guide rods 198 slide through the bottom end of the air hood 171, and a limit plate is fixedly connected to the upper end of both guide rods 198. The two guide rods 198 guide the transmission plate 194 and the transmission cylinder 195, ensuring that the transmission plate 194 and the transmission cylinder 195 can only move in the vertical direction. The bottom end of the connecting shaft 21 is fixedly connected to the transmission shaft 196. The side wall of the transmission shaft 196 is provided with an inclined groove 197. The inner wall of the transmission cylinder 195 is fixedly connected to a sliding ball 199. The sliding ball 199 is slidably connected in the inclined groove 197. The inner wall of the inclined groove 197 is smooth, and the sliding ball 199 can slide smoothly in the inclined groove 197.

[0072] More specifically, in combination Figure 5 The sealing mechanism 18 includes an annular groove 181 formed at the bottom end of the sealing plate 2, located directly below the two discharge ports 9. Two arc-shaped plates 182 are slidably connected within the annular groove 181. The arc-shaped plates 182 are larger than the arc-shaped cross-section of the discharge ports 9, and one arc-shaped plate 182 can completely cover the bottom end of one discharge port 9. A transmission rod 183 is fixedly connected to the bottom end of each of the two arc-shaped plates 182. A connecting plate 184 is fixedly connected to the bottom end of both transmission rods 183. The connecting plate 184 is fixedly sleeved on the side wall of the connecting shaft 21, and its rotation is triggered by the connecting shaft 21.

[0073] A method for airflow sieving of white Ganoderma lucidum powder includes the following steps:

[0074] S1: Open the cover 5, add the material to be screened into the hopper 3, and then close the cover 5 tightly. The two support blocks 6 can support the cover 5 when it is open.

[0075] Start the external compressor fan, and the airflow enters the air hood 171 through the airflow pipe 11.

[0076] S2: The material in the hopper 3 falls into the screening plate 14 through the two discharge ports 9. The airflow in the airflow pipe 11 is discharged downward through several air outlets 172 under the guidance of the air guide column 173, and blows a large area towards the screening plate 14. The fine powder material at the top of the screening plate 14 falls to the bottom of the screening cylinder 1 under the action of the airflow and is discharged through the discharge pipe 7.

[0077] S3: A small portion of coarse powder will remain inside the screening plate 14 and be concentrated at the bottom of the inner wall of the screening plate 14, without accumulating at the screening holes of the screening plate 14, effectively avoiding obstruction of the screening holes.

[0078] S4: After screening for a period of time, start the servo motor 20, causing the output shaft of the servo motor 20 to rotate 90 degrees in the forward direction. At this time, the connecting shaft 21 rotates 90 degrees. The connecting shaft 21 drives the sealing mechanism 18 to block the two discharge ports 9, and the material hopper 3 stops discharging. The specific working process of the sealing mechanism 18 is as follows: the output shaft of the servo motor 20 rotates 90 degrees, which drives the connecting shaft 21 to rotate 90 degrees, which in turn drives the connecting plate 184 to rotate 90 degrees. Finally, through the two transmission rods 183, the two arc plates 182 rotate 90 degrees in the annular groove 181, so that the two arc plates 182 cover the bottom of the two discharge ports 9 respectively, temporarily blocking the two discharge ports 9. At this time, the two discharge ports 9 stop discharging.

[0079] While the connecting shaft 21 drives the sealing mechanism 18, it also simultaneously drives the cleaning auxiliary mechanism 19, opening the upper port of the cleaning pipe 15. Under the action of airflow, the coarse powder material in the screening plate 14 is discharged through the cleaning pipe 15 and the discharge pipe 8. When the coarse material is discharged, the two discharge ports 9 stop discharging. The specific working principle of the cleaning auxiliary mechanism 19 is as follows: when the connecting shaft 21 rotates 90 degrees, it will drive the transmission shaft 196 to rotate 90 degrees. Since the transmission cylinder 195 and the transmission plate 194 will not rotate under the guidance of the two guide rods 198, the sliding ball 199 will slide in the inclined groove 197 during the rotation of the transmission shaft 196 (at this time, the sliding ball 199 slides upward in the inclined groove 197), which will drive the transmission cylinder 195 and the transmission plate 194 to move upward a certain distance. The connecting rod 193 pulls the connecting block 192 and the insert plate 191 upwards, causing the insert plate 191 to move away from the upper port of the cleaning pipe 15, thus opening the upper port of the cleaning pipe 15. The coarse material accumulated on the inner wall of the bottom of the screening plate 14 quickly slides into the cleaning pipe 15 under the action of airflow and is discharged through the discharge pipe 8. The connecting block 192 is designed to ensure complete discharge of the coarse material. The connecting block 192 is conical, with its upper diameter smaller than its lower diameter, allowing the coarse material at the bottom of the screening plate 14 to slide smoothly downwards. In this application, the screening plate 14 is designed as a cone shape with coarser material at the top and thinner material at the bottom. This not only increases the screening area but also prevents coarse material from accumulating on the screening surface of the screening plate 14. The structure of the screening plate 14 in this application ensures that the remaining coarse material is concentrated at the bottom of the screening plate 14, without affecting the screening effect, and also facilitates the centralized discharge of coarse material.

[0080] S5: After the coarse powder material in the screening plate 14 is discharged, the output shaft of the servo motor 20 rotates 90 degrees in the opposite direction, restoring the device to the screening state and continuing to screen the material. The 90-degree rotation of the output shaft of the servo motor 20 drives the connecting shaft 21 to rotate 90 degrees in the opposite direction, which in turn drives the two transmission rods 183 to deflect 90 degrees in the opposite direction through the connecting plate 184. Finally, the two arc plates 182 slide away from the two discharge ports 9 respectively, restoring the feeding mode. The synchronous connecting shaft 21 drives the transmission shaft 196 to rotate 90 degrees in the opposite direction. At this time, the sliding ball 199 slides downward in the inclined groove 197, causing the transmission cylinder 195 and the transmission plate 194 to slide vertically downward (under the guidance of the two guide rods 198). Finally, the connecting rod 193 presses the connecting block 192 and the insert plate 191 downward, causing the insert plate 191 to be inserted into the upper port of the cleaning pipe 15, sealing the cleaning pipe 15 and quickly restoring the screening mode. The above steps are repeated to complete the screening of materials and the discharge of coarse materials. In this application, the servo motor 20 is electrically connected to an external controller. The controller starts the servo motor 20 at regular intervals (the start interval of the servo motor 20 is at least 30 minutes, which can be determined according to the coarse material content in the material. If the coarse material content is low, the start interval of the servo motor 20 can be extended). The output shaft of the servo motor 20 first rotates 90 degrees in the forward direction, and then rotates 90 degrees in the reverse direction after a period of time. The interval is preferably 30 seconds.

[0081] In this application, to facilitate the smooth discharge of fine and coarse materials from discharge pipe 7 and discharge pipe 8, centrifugal fans are installed at the ends of discharge pipe 7 and discharge pipe 8. When the output shaft of servo motor 20 rotates 90 degrees in the forward direction, the centrifugal fan at the end of discharge pipe 8 operates, putting discharge pipe 8 into a negative pressure discharge state, and the centrifugal fan at the end of discharge pipe 7 stops operating; when the output shaft of servo motor 20 rotates 90 degrees in the reverse direction, the centrifugal fan at the end of discharge pipe 7 operates, putting discharge pipe 7 into a negative pressure discharge state, and the centrifugal fan at the end of discharge pipe 8 stops operating.

[0082] In summary, this application, by setting a guide 17 at the bottom of the sealing plate 2, can evenly guide the airflow in the airflow pipe 11 to the top of the screening plate 14, so that the screening plate 14 can be evenly subjected to the airflow, ensuring the screening effect. By setting a cleaning auxiliary mechanism 19 at the upper end of the cleaning pipe 15 and a sealing mechanism 18 at the bottom of the two discharge ports 9, the connecting shaft 21 can be rotated 90 degrees in the forward direction to simultaneously close the two discharge ports 9 and open the port of the cleaning pipe 15. Under the action of the airflow, the coarse material on the inner wall of the bottom end of the screening plate 14 is discharged through the cleaning pipe 15. When the coarse material is discharged, the material in the hopper 3 will not fall, thus effectively preventing the unscreened material from being discharged with the coarse material, achieving the effect of completely separating the fine and coarse materials for discharge, without affecting the screening efficiency.

[0083] In this application, after the insert plate 191 moves upward, the port of the cleaning pipe 15 opens. Since the screening plate 14 is conical with a downward-sloping arc-shaped inner wall, and the opening at the bottom of the screening plate 14 is much larger than the screening holes on its side wall, the airflow will quickly blow the coarse material on the inner wall of the screening plate 14 into the cleaning pipe 15, restoring the screening plate 14 to its original screening state. After the coarse material is discharged, the connecting shaft 21 rotates 90 degrees in the opposite direction, the cleaning pipe 15 is restored to its original sealing state, the two discharge ports 9 are opened, and the screening mode is immediately restored. The entire process is completed in a closed environment.

[0084] The above specific embodiments are merely preferred embodiments of this application. Based on the technical solutions of this application and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments. The above specific embodiments are merely explanations of this application and are not limitations on this application.

Claims

1. An airflow sieving device for white Ganoderma lucidum powder, comprising a sieving cylinder (1) and a sealing plate (2) fixedly connected to its upper end, wherein a material hopper (3) is fixedly connected to the upper end of the sealing plate (2), characterized in that, Also includes: A screening plate (14) is installed on the inner wall of the screening cylinder (1). A cleaning pipe (15) is connected through the bottom end of the screening plate (14). A discharge pipe (7) is connected to the bottom end of the screening cylinder (1) through a conical cover (16). Cleaning auxiliary mechanism (19) is used to control the opening and closing of the cleaning pipe (15) port; A flow guide (17) is installed at the bottom of the sealing plate (2), and the flow guide (17) is perpendicular to the screening plate (14). Two discharge ports (9) are opened on the sealing plate (2), and a sealing mechanism (18) is provided at the bottom of the discharge port (9). The servo motor (20) located at the bottom of the diverter (17) synchronously controls the sealing mechanism (18) and the cleaning auxiliary mechanism (19) through the connecting shaft (21) at the output end of the servo motor (20), so that the opening and closing of the two discharge ports (9) corresponds synchronously with the opening and closing of the cleaning pipe (15) port.

2. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 1, characterized in that, The upper end of the hopper (3) is covered with a cover plate (4), and an opening and closing cover (5) is rotatably connected to the cover plate (4). The upper middle part of the sealing plate (2) is fixedly connected to the guide column (10), and the two discharge ports (9) are located on the outer side of the bottom end of the guide column (10), and the material in the hopper (3) is guided through the guide column (10).

3. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 2, characterized in that, It also includes an airflow pipe (11) that passes through the cover plate (4), the guide column (10) and the sealing plate (2) and extends into the screening cylinder (1); The draining component (17) includes an air hood (171) fixedly connected to the bottom end of the sealing plate (2). The air hood (171) is located inside the two discharge ports (9). Several air outlets (172) are opened at the outer edge of the bottom end of the air hood (171). A guide column (173) is fixedly connected to the axial center of the inner wall of the bottom end of the air hood (171). The guide column (173) is located directly below the output end of the airflow pipe (11) and is used to guide the gas input from the airflow pipe (11) to several air outlets (172).

4. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 3, characterized in that, The cleaning auxiliary mechanism (19) includes: A plug plate (191) is inserted into the upper port of the cleaning tube (15), and a connecting block (192) is fixedly connected to the upper end of the plug plate (191). The connecting block (192) is conical. A connecting rod (193) is fixedly connected to the upper end of the connecting block (192). A transmission plate (194) is fixedly connected to the upper end of the connecting rod (193). A transmission cylinder (195) and a pair of guide rods (198) are connected to the upper end of the transmission plate (194). Both guide rods (198) slide through the bottom end of the air cover (171), and a limit plate is fixedly connected to the upper end of both guide rods (198).

5. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 4, characterized in that, The bottom end of the connecting shaft (21) is fixedly connected to a transmission shaft (196), and the side wall of the transmission shaft (196) is provided with a slanted groove (197). The inner wall of the transmission cylinder (195) is fixedly connected to a sliding ball (199), and the sliding ball (199) is slidably connected in the slanted groove (197).

6. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 5, characterized in that, The sealing mechanism (18) includes an annular groove (181) formed at the bottom of the sealing plate (2), the annular groove (181) being located directly below the two discharge ports (9); Two arc-shaped plates (182) are slidably connected inside the annular groove (181), and the arc-shaped plates (182) are larger than the arc-shaped cross-section of the discharge port (9); The bottom ends of the two arc-shaped plates (182) are fixedly connected to transmission rods (183), and the bottom ends of the two transmission rods (183) are fixedly connected to a connecting plate (184), which is fixedly sleeved on the side wall of the connecting shaft (21).

7. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 1, characterized in that, The output end of the cleaning pipe (15) is fixedly connected to the discharge pipe two (8), which penetrates the side wall of the screening cylinder (1) and extends to the outside of the screening cylinder (1).

8. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 1, characterized in that, The inner wall of the screening cylinder (1) is fixedly connected to a support ring (13), and the screening plate (14) is fixedly installed on the upper end of the support ring (13). The sieve plate (14) is conical, and the upper diameter of the sieve plate (14) is larger than the lower diameter.

9. The airflow sieving device for white-fleshed Ganoderma lucidum powder according to claim 2, characterized in that, A pair of support blocks (6) are fixedly connected to the upper end of the cover plate (4). The two support blocks (6) are set as inclined surfaces on the side near the opening and closing cover (5) to support the opening and closing cover (5) when it is opened. Two support blocks (6) are located on both sides of the airflow pipe (11), and the inclined surfaces of the two support blocks (6) are higher than the arc-shaped end of the airflow pipe (11) to prevent the airflow pipe (11) from being hit when the cover (5) is opened. The airflow pipe (11) is connected to an external compressor fan.

10. A method for airflow sieving of white-fleshed Ganoderma lucidum powder, applied to the airflow sieving device for white-fleshed Ganoderma lucidum powder as described in claim 6, characterized in that, Includes the following steps: S1: Add the material to be screened into the silo (3) and start the external compressor fan; S2: The material in the hopper (3) falls into the screening plate (14) through the two discharge ports (9). The airflow in the airflow pipe (11) is blown towards the screening plate (14) in a large area under the guidance of the guide (17). The fine powder material at the top of the screening plate (14) falls to the bottom of the screening cylinder (1) under the action of the airflow and is discharged through the discharge pipe (7). S3: A small portion of coarse powder will remain inside the screening plate (14) and be concentrated at the bottom of the inner wall of the screening plate (14); S4: After screening for a period of time, start the servo motor (20) to make the output shaft of the servo motor (20) rotate 90 degrees in the positive direction. At this time, the connecting shaft (21) rotates 90 degrees. The connecting shaft (21) drives the sealing mechanism (18) to seal the two discharge ports (9). At this time, the hopper (3) stops discharging. The connecting shaft (21) synchronously drives the cleaning auxiliary mechanism (19) to open the upper port of the cleaning pipe (15). Under the action of airflow, the coarse powder material in the screening plate (14) is discharged through the cleaning pipe (15) and the discharge pipe 2 (8). S5: After the coarse powder material in the screening plate (14) is discharged, the output shaft of the servo motor (20) rotates 90 degrees in the opposite direction, so that the device returns to the screening state and continues to screen the material.

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