Screening device for tea grading

Abstract

The utility model discloses a screening device for grading tea leaves, and relates to the field of tea leaf processing equipment, and the scheme is that the screening device for grading the tea leaves comprises a rack; the screening box body is installed on the rack, and the bottom of the screening box body is of an open structure; the sectional type cylinder body is arranged in the screening box body in a penetrating mode, the sectional type cylinder body comprises a screening section, and the screening section is rotationally installed in the screening box body; the main shaft is coaxially arranged in the sectional type cylinder in a penetrating manner; the driving assembly is connected with the main shaft and can drive the main shaft to rotate; the transmission convex block is arranged on the inner wall of the screening section, and the transmission convex block and the screening section can rotate synchronously; residual tea leaves in the sectional type barrel can be efficiently removed, pollution and mixed flavor are avoided, and the screening hygienic standard and the tea leaf quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of tea processing equipment, specifically to a sieving device for grading tea. Background Technology

[0002] As a globally popular traditional beverage, tea's quality directly determines its market value and profoundly impacts the consumer's drinking experience. Sieving and grading are core steps in improving quality and efficiency during tea processing. Today, the high-end gift tea market demands near-stringent standards for the integrity and uniformity of tea buds and leaves, while the mass consumer market requires segmentation based on tea particle size and shape differences to cater to diverse product needs such as tea bags and instant tea. Scientific and precise grading can significantly enhance the added value of tea. Simultaneously, with the accelerated transformation of tea processing towards mechanization and intelligentization, sieving and grading not only effectively removes impurities and foreign matter from tea leaves, ensuring the purity of raw materials, but also achieves homogenization of raw materials through precise tea grading. This lays a stable foundation for subsequent processes such as rolling and fermentation, becoming crucial for ensuring consistent tea quality.

[0003] A tea leaf grading device disclosed in authorization announcement number (CN221017188U) includes a support frame and a segmented cylinder. A first support rod and a third support rod are respectively installed on both sides of the support frame, and a drive device is installed above the first support rod. When using this device to sieve tea leaves, the operator places the tea leaves to be sieved in the first screen area. After starting the drive motor, the segmented cylinder begins to rotate at a constant speed, and the tea leaves continuously tumble inside the cylinder. Tea leaves with a particle size smaller than the first screen mesh size pass through the mesh under the action of rolling and gravity, falling into the first collection box below for collection, thus achieving preliminary sieving and grading.

[0004] The structure disclosed in this patent has flaws in practical application. Specifically, while controlling the rotation of the segmented cylinder to continuously tumble the tea leaves within it increases the contact area between the tea leaves and the sieve, improving grading efficiency, tea fragments and powder easily remain on the sieve surface after prolonged operation. If these residual tea leaves are not cleaned in time, they may not only breed bacteria and cause contamination, but also lead to cross-contamination of flavors between different batches and types of tea, seriously affecting the quality and flavor purity of subsequent tea grading. This makes it difficult to meet the hygiene standards of food processing and the stringent aroma requirements of high-end teas. Utility Model Content

[0005] The purpose of this utility model is to provide a sieving device for tea grading, which addresses the problem of tea residue on the screen caused by the rotation of the segmented cylinder in the prior art, and the resulting pollution and mixed flavors. This device can efficiently remove tea residue from the segmented cylinder, avoid pollution and mixed flavors, and improve the hygiene standards of sieving and the quality of tea.

[0006] This utility model is achieved through the following technical solution:

[0007] A sieving device for grading tea leaves includes: a frame; a sieving box mounted on the frame, the bottom of the sieving box having an open structure; a segmented cylinder extending through the sieving box, the segmented cylinder including sieving sections rotatably mounted inside the sieving box; a main shaft coaxially extending through the segmented cylinder; a drive assembly connected to the main shaft, capable of driving the main shaft to rotate; a transmission protrusion disposed on the inner wall of the sieving sections, capable of rotating synchronously with the sieving sections; and a scraping assembly mounted on the main shaft, located within the sieving sections, capable of engaging with the transmission protrusion.

[0008] Furthermore, in this utility model, the scraping assembly includes a scraper and at least one connector; one end of the connector is connected to the main shaft, and the other end of the connector is connected to the scraper; wherein, in the screening state, the scraper and the transmission protrusion form an abutting engagement, and the scraper drives the screening section to rotate synchronously through the abutting force with the transmission protrusion; in the cleaning state, the scraper rotates away from the transmission protrusion, the scraper disengages from the transmission protrusion, and the scraper rotates relative to the screening section.

[0009] Furthermore, in this utility model, the above also includes a first elastic member; the scraper includes a fixed connecting section and a driven abutting section, the fixed connecting section is provided with an assembly groove, and the driven abutting section is guided and installed in the assembly groove; one end of the first elastic member is connected to the bottom wall of the assembly groove, and the other end of the first elastic member is connected to the driven abutting section.

[0010] Furthermore, in this utility model, the above also includes a second elastic element; a guide groove is provided on the inner wall of the screening section, and the transmission protrusion is guided and installed in the guide groove, with a guide slope provided at the end of the transmission protrusion away from the guide groove; one end of the second elastic element is connected to the bottom wall of the guide groove, and the other end of the second elastic element is connected to the transmission protrusion; wherein, in the screening state, the scraper rotates clockwise, and the abutting end of the scraper forms a rigid abutting fit with the transmission protrusion, and the scraper can drive the transmission protrusion to drive the screening section to rotate synchronously; in the cleaning state, the scraper rotates counterclockwise, and the abutting end of the scraper contacts the guide slope, and the scraper can push the transmission protrusion to retract into the guide groove.

[0011] Furthermore, in this utility model, the above also includes a discharge funnel, the top of which is the first feed end and the bottom of which is the first discharge end; the discharge funnel is installed on the frame and the feed end is connected to the bottom of the screening box.

[0012] Furthermore, in this utility model, the above also includes a spiral blade; the segmented cylinder includes a feeding section with a feeding interface, one end of the feeding section is rotatably mounted with the screening section, and the other end of the feeding section extends to the outside of the segmented cylinder; the spiral blade is mounted on the main shaft and is located inside the feeding section.

[0013] Furthermore, in this utility model, the above also includes a feeding funnel; the top of the feeding funnel is a second feeding end, the bottom of the feeding funnel is a second discharging end, and the second discharging end is connected to the feeding interface.

[0014] Furthermore, in this utility model, the segmented cylinder includes a discharge section with a discharge interface, one end of which is rotatably mounted to the screening section, and the other end of which extends to the outside of the segmented cylinder.

[0015] Furthermore, in this utility model, the aforementioned drive assembly includes a motor, a driving gear, and a driven gear; the motor is mounted on the frame, and the output end of the motor is connected to the driving gear; one end of the main shaft extends to the outside of the segmented cylinder, and the end of the main shaft is connected to the driven gear, which meshes with the driving gear.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] 1. This application utilizes a linkage design between the scraping assembly and the main shaft. After screening, only the rotation direction of the main shaft needs to be switched, allowing the scraping assembly to rotate independently relative to the inner wall of the screening section. The scraper's elastic contact structure (first elastic element) dynamically adheres to the inner wall, automatically scraping away residual tea leaves from the sieve holes and wall surface. Compared to existing technologies that rely on manual shutdown for cleaning, this eliminates the need to interrupt the screening process, preventing bacterial growth from residual tea leaves or cross-contamination of flavors between different batches of tea, significantly improving hygiene standards and the purity of tea quality.

[0018] 2. In the screening state, the scraping assembly drives the screening sections to rotate synchronously via transmission protrusions, allowing the tea leaves to frequently contact the screen openings under centrifugal force and tumbling action. Compared to the static screen screening method in the prior art, this significantly increases the contact frequency between the tea leaves and the screen openings, improving screening efficiency. Simultaneously, the screening sections are rotatably connected to the feeding and discharging sections via bearings, decoupling the screening, conveying, and discharging functions. This avoids disruption to screening continuity due to cleaning requirements, ensuring efficient equipment operation. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 A perspective view of a sieving device for grading tea leaves;

[0021] Figure 2 A front view of a sieving device for grading tea leaves;

[0022] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0023] Figure 4 This is a schematic diagram of the internal structure of the screening section;

[0024] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 This is a schematic diagram of the transmission protrusion.

[0026] Figure 7 This is a cross-sectional view of the scraper;

[0027] Figure 8 This is a schematic diagram of the drive component.

[0028] The attached diagram shows the markings and corresponding component names:

[0029] 1-Frame, 2-Screening box, 3-Discharge hopper, 4-First feed end, 5-First discharge end, 6-Feed hopper, 7-Second feed end, 8-Second discharge end, 9-Motor, 10-Feeding section, 11-Feeding interface, 12-Discharge section, 13-Discharge interface, 14-Main shaft, 15-Screwing section, 16-Spiral blade, 17-Connector, 18-Scraper, 19-Guide chute, 20-Second elastic element, 21-Transmission protrusion, 22-Guide inclined surface, 23-Driving gear, 24-Driven gear, 25-Fixed connection section, 26-Assembly groove, 27-Driven abutment section, 28-First elastic element. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0031] Example

[0032] Please refer to Figures 1 to 3This utility model provides a sieving device for tea grading. It includes a frame 1, a sieving box 2, a segmented cylinder, a main shaft 14, a drive assembly, a transmission protrusion 21, and a scraping assembly. The sieving box 2 is mounted on the frame 1, and its bottom is open. The segmented cylinder is inserted inside the sieving box 2, and includes sieving sections 15 rotatably mounted inside the sieving box 2. The segmented cylinder can be tilted to convey tea leaves within it. The main shaft 14 is coaxially inserted inside the segmented cylinder. The drive assembly connects to the main shaft 14 and drives it to rotate. The transmission protrusion 21 is located on the inner wall of the sieving section 15 and rotates synchronously with it. The scraping assembly is mounted on the main shaft 14 and located within the sieving section 15, and it engages with the transmission protrusion 21.

[0033] The working process is as follows: The operator adds tea leaves from one end of the segmented cylinder. The tea leaves are conveyed into the screening section 15 within the segmented cylinder (through its inclined arrangement). The drive assembly drives the main shaft 14, causing the scraper assembly to rotate in the first direction. When the scraper assembly rotates, it abuts against the transmission protrusion 21 on the inner wall of the screening section 15, thereby pushing the transmission protrusion 21 and the screening section 15 to rotate synchronously. As the screening section 15 rotates, it conveys the tea leaves on one hand, and on the other hand, the multiple sieve holes on the surface of the screening section 15 cause the tea leaves to come into contact with the sieve holes during the tumbling process. Smaller tea leaves fall through the sieve holes to the open structure at the bottom of the screening box 2 and are discharged and collected, while larger tea leaves are intercepted within the screening section 15 and finally output from the other end of the segmented cylinder.

[0034] When the inner wall of the screening section 15 becomes clogged due to prolonged screening, the scraping assembly is controlled to rotate in the second direction (away from the transmission protrusion 21). At this time, the scraping assembly and the screening section 15 rotate relative to each other, and the interaction between the two scrapes off the residual tea leaves on the inner wall of the screening section 15, causing the tea leaves to fall into the segmented cylinder and be discharged from the other end of the segmented cylinder under the conveying action. When the scraping assembly rotates in the second direction and comes into contact with the transmission protrusion 21 again, the scraping assembly is controlled to rotate in the opposite direction, continuously maintaining the relative rotation between the scraping assembly and the screening section 15 to avoid synchronous rotation and ensure effective execution of the cleaning function.

[0035] Please refer to Figure 3 and Figure 4In some embodiments of this application, the scraping assembly includes a scraper 18 and at least one connector 17. One end of the connector 17 is connected to the main shaft 14, and the other end is connected to the scraper 18. The scraper 18 extends axially along the screening section 15. When the main shaft 14 rotates, it drives the connector 17 to rotate synchronously, thereby driving the scraper 18 to rotate. In the screening state, the scraper 18 rotates with the main shaft 14 in the first direction until it abuts against the transmission protrusion 21. The abutting force between the two pushes the transmission protrusion 21 to rotate, causing the screening section 15 to rotate synchronously. At this time, the scraper 18 can not only drive the screening section 15 to complete the tea screening through mechanical transmission, but the outer arc surface of the scraper 18 also maintains dynamic contact with the inner wall of the screening section 15. The scraper 18 can slightly scrape the tea during rotation to assist in screening.

[0036] When the inner wall of the screening section 15 needs cleaning, the main shaft 14 is controlled to rotate the scraper 18 in the second direction (away from the transmission protrusion 21). The scraper 18 disengages from the transmission protrusion 21, and at this time, the scraper 18 rotates independently relative to the screening section 15. The outer arc surface of the scraper 18 moves relative to the inner wall of the screening section 15, scraping off the attached tea residue through friction. The residue falls into the segmented cylinder and is discharged by the conveying action. When the scraper 18 rotates in the second direction and abuts against the transmission protrusion 21 again, the main shaft 14 is controlled to rotate in the opposite direction again, always maintaining the relative rotation state of the scraper 18 and the screening section 15 to avoid synchronous rotation and ensure cleaning effect.

[0037] Please refer to Figure 7 In some embodiments of this application, the scraping assembly further includes a first elastic element 28, and the scraper 18 specifically includes a fixed connecting section 25 and a driven abutment section 27. The fixed connecting section 25 is connected to the connector 17, and an assembly groove 26 is provided inside the fixed connecting section 25. A guide structure (such as a slide rail or slide groove) is provided inside the assembly groove 26, and the driven abutment section 27 is slidably installed in the assembly groove 26 through the guide structure. One end of the first elastic element 28 (e.g., a compression spring) is connected to the bottom wall of the assembly groove 26, and the other end of the first elastic element 28 abuts against the inner end face of the driven abutment section 27, so that the driven abutment section 27 slides along the axial direction of the assembly groove 26 through the guide structure under the elastic force of the first elastic element 28, thereby ensuring that the outer arc surface of the driven abutment section 27 always maintains an adaptive abutment state with the inner wall of the screening section 15.

[0038] With this structural design, when the inner wall of the screening section 15 changes shape due to the accumulation of tea leaves, the driven abutment section 27 can dynamically adjust the abutment pressure through the compression or extension of the elastic element, ensuring that it fits tightly against the inner wall without any blind spots during the cleaning process, effectively improving the efficiency of scraping off residues; at the same time, the elastic abutment design can buffer the rigid impact between the scraper 18 and the screen wall, reduce the operating noise of the equipment and extend the service life of the components.

[0039] Please refer to Figures 4 to 6 In some embodiments of this application, the screening device further includes a second elastic element 20. A guide groove 19 is provided on the inner wall of the screening section 15. The transmission protrusion 21 is slidably installed within the guide groove 19 via a guide structure (such as a slider and a guide rail). A guide slope 22 is provided at one end of the transmission protrusion 21 away from the guide groove 19. One end of the second elastic element 20 (such as a compression spring) is fixedly connected to the bottom wall of the guide groove 19, and the other end of the second elastic element 20 is connected to the transmission protrusion 21.

[0040] In the sieving state, the scraper 18 rotates clockwise with the main shaft 14, and the abutting end of the scraper 18 forms a rigid abutment with the vertical surface of the transmission protrusion 21. The scraper 18 drives the transmission protrusion 21 and the sieving section 15 to rotate synchronously, thereby realizing the sieving of tea leaves.

[0041] When switching to the cleaning state, the scraper 18 rotates counterclockwise with the main shaft 14. The abutting end of the scraper 18 first contacts the guide slope 22 of the transmission protrusion 21. The axial force generated along the guide slope 22 pushes the transmission protrusion 21 to retract into the guide groove 19 against the elastic force of the second elastic element 20. When the transmission protrusion 21 is fully retracted into the guide groove 19, the scraper 18 can pass through the installation position of the transmission protrusion 21 without obstruction. After the scraper 18 has passed, the transmission protrusion 21 automatically resets under the elastic force of the second elastic element 20, at least partially extending out of the guide groove 19. This design eliminates the need for the scraper 18 to rotate in the opposite direction after contacting the transmission protrusion 21. It only needs to rotate counterclockwise continuously to clean the inner wall of the screening section 15 throughout the process, avoiding the cumbersome operation of frequently switching the direction of the scraper 18, and significantly improving the simplicity and reliability of the equipment operation.

[0042] Please refer to Figure 1 and Figure 2 In some embodiments of this application, the screening device further includes a discharge funnel 3, with the top of the discharge funnel 3 being a first feed end 4 and the bottom of the discharge funnel 3 being a first discharge end 5. The discharge funnel 3 is fixedly installed on the frame 1, and the first feed end 4 of the discharge funnel 3 is connected to the bottom opening of the screening box 2 to form a guide channel for the screened material.

[0043] When the screening section 15 rotates, the tea leaves inside the screening section 15 continuously tumble under the action of centrifugal force and gravity, making full contact with the sieve holes on the surface of the screening section 15. Tea particles with a diameter smaller than the sieve holes pass through the sieve holes and fall to the bottom of the screening box 2, and enter the discharge funnel 3 through the first feed end 4. Inside the discharge funnel 3, the tea leaves are accelerated by gravity and converge along the inner wall of the discharge funnel 3 towards the first discharge end 5 for discharge, making it convenient for operators to collect the graded tea leaves. This structure, through the flow guiding design of the funnel, avoids the scattering of materials after screening, improves collection efficiency, and shortens the residence time of materials in the equipment, meeting the cleanliness requirements of tea processing technology.

[0044] Please refer to Figures 1 to 3 In some embodiments of this application, one end of the feeding section 10 of the segmented cylinder is rotatably connected to the screening section 15 via bearings, and the other end of the feeding section 10 extends to the outside of the screening box 2 to form a feeding interface 11. A spiral blade 16 is fixedly installed on the outer periphery of the main shaft 14 and located within the feeding section 10, with the spiral direction of the spiral blade 16 matching the rotation direction of the main shaft 14. When the operator feeds tea leaves into the feeding interface 11, the main shaft 14 drives the spiral blade 16 to rotate synchronously, and the spiral propulsion action conveys the tea leaves axially along the feeding section 10 to the screening section 15. Because the feeding section 10 and the screening section 15 are rotatably connected, when the main shaft 14 drives the spiral blade 16 to rotate, the screening section 15 can rotate independently relative to the feeding section 10. This structural design ensures stable conveying of tea leaves in the feeding section 10 and avoids interference with the screening effect of the screening section 15 during the conveying process, thus improving the overall operating efficiency of the equipment.

[0045] In some embodiments of this application, the top of the feeding funnel 6 is a second feeding end 7, and the bottom of the feeding funnel 6 is a second discharging end 8. The second discharging end 8 is sealed and connected to the feeding interface 11 of the feeding section 10. Operators can feed tea leaves into the feeding funnel 6 through the second feeding end 7. After being guided by the conical inner wall, the material falls evenly into the feeding section 10 through the second discharging end 8. The feeding funnel 6 increases the feeding space, reduces the difficulty of manual feeding, and the conical structure guides the tea leaves smoothly into the feeding interface 11, avoiding spillage or accumulation caused by direct feeding, effectively improving feeding efficiency and operational convenience.

[0046] Please refer to Figure 1 and Figure 2 In some embodiments of this application, the segmented cylinder further includes a discharge section 12. One end of the discharge section 12 is rotatably connected to the screening section 15 via a bearing, and the other end of the discharge section 12 extends to the outside of the screening box 2 and forms a discharge port 13. Tea leaves (i.e., tea particles with a diameter larger than the sieve holes) that have been screened by the screening section 15 are pushed axially into the discharge section 12 by the rotation of the screening section 15 and discharged from the equipment through the discharge port 13. Because the discharge section 12 and the screening section 15 are rotatably connected, the rotation of the screening section 15 does not directly drive the discharge section 12 to rotate synchronously, thus ensuring that the screened tea leaves can be smoothly and orderly discharged from the discharge port 13 under the action of gravity and axial thrust, avoiding material accumulation or blockage at the discharge end, and achieving efficient connection between screening and discharge functions.

[0047] Please refer to Figure 8In some embodiments of this application, the drive assembly includes a motor 9, a drive gear 23, and a driven gear 24. The motor 9 is fixed to the frame 1 via a mounting base, and its output end is connected to the drive gear 23. One end of the main shaft 14 extends outside the segmented cylindrical body, and the driven gear 24 is fitted to the end of the main shaft 14. This driven gear 24 meshes with the drive gear 23 to form a transmission pair. During operation, the motor 9 drives the drive gear 23 to rotate, and the drive gear 23 drives the driven gear 24 and the main shaft 14 to rotate synchronously, thereby providing power to the screening device.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sieving device for grading tea leaves, characterized in that, include: Rack (1); Screening box (2), the screening box (2) is installed on the frame (1), and the bottom of the screening box (2) is an open structure; The segmented cylinder is inserted into the screening box (2). The segmented cylinder includes a screening section (15), which is rotatably installed inside the screening box (2). Main shaft (14), which is coaxially inserted inside the segmented cylinder; A drive assembly connected to the spindle (14) and capable of driving the spindle (14) to rotate; A transmission protrusion (21) is disposed on the inner wall of the screening section (15), and the transmission protrusion (21) can rotate synchronously with the screening section (15); The scraper assembly is mounted on the main shaft (14) and located within the screening section (15). The scraper assembly can form an abutment fit with the transmission protrusion (21).

2. The sieving device for tea grading according to claim 1, characterized in that, The scraping assembly includes a scraper (18) and at least one connector (17); One end of the connector (17) is connected to the main shaft (14), and the other end of the connector (17) is connected to the scraper (18); In the screening state, the scraper (18) and the transmission protrusion form an abutting fit, and the scraper (18) drives the screening section (15) to rotate synchronously through the abutting force with the transmission protrusion (21); In the cleaning state, the scraper (18) rotates away from the transmission protrusion (21), the scraper (18) disengages from the transmission protrusion (21), and the scraper (18) rotates relative to the screening section (15).

3. The sieving device for tea grading according to claim 2, characterized in that, It also includes the first elastic element (28); The scraper (18) includes a fixed connecting section (25) and a driven abutting section (27). The fixed connecting section (25) is provided with an assembly groove (26), and the driven abutting section (27) is guided and installed in the assembly groove (26). One end of the first elastic member (28) is connected to the bottom wall of the assembly groove (26), and the other end of the first elastic member (28) is connected to the driven abutment section (27).

4. The sieving device for tea grading according to claim 2, characterized in that, It also includes a second elastic element (20); The inner wall of the screening section (15) is provided with a guide groove (19), the transmission protrusion (21) is guided and installed in the guide groove (19), and the end of the transmission protrusion (21) away from the guide groove (19) is provided with a guide slope (22). One end of the second elastic member (20) is connected to the bottom wall of the guide groove (19), and the other end of the second elastic member (20) is connected to the transmission protrusion (21); In the screening state, the scraper (18) rotates clockwise, and the abutting end of the scraper (18) forms a rigid abutting fit with the transmission protrusion (21). The scraper (18) can drive the transmission protrusion (21) to drive the screening section (15) to rotate synchronously. In the cleaning state, the scraper (18) rotates counterclockwise, and the abutting end of the scraper (18) contacts the guide slope (22). The scraper (18) can push the transmission protrusion (21) to retract into the guide groove (19).

5. The sieving device for tea grading according to any one of claims 1 to 4, characterized in that, It also includes a discharge funnel (3), the top of which is the first feed end (4), and the bottom of which is the first discharge end (5); The discharge hopper (3) is installed on the frame (1), and the feed end is connected to the bottom end of the screening box (2).

6. The sieving device for tea grading according to any one of claims 1 to 4, characterized in that, It also includes helical blades (16); The segmented cylinder includes a feeding section (10) with a feeding port (11), one end of the feeding section (10) is rotatably mounted to the screening section (15), and the other end of the feeding section (10) extends to the outside of the segmented cylinder; The spiral blade (16) is mounted on the main shaft (14) and the spiral blade (16) is located in the feeding section (10).

7. The sieving device for tea grading according to claim 6, characterized in that, It also includes a feed funnel (6); The top of the feeding funnel (6) is the second feeding end (7), and the bottom of the feeding funnel (6) is the second discharging end (8). The second discharging end (8) is connected to the feeding interface (11).

8. The sieving device for tea grading according to claim 7, characterized in that, The segmented cylinder includes a discharge section (12) with a discharge port (13), one end of which is rotatably mounted to the screening section (15), and the other end of which extends to the outside of the segmented cylinder.

9. The sieving device for tea grading according to claim 8, characterized in that, The drive assembly includes a motor (9), a drive gear (23), and a driven gear (24); The motor (9) is mounted on the frame (1), and the output end of the motor (9) is connected to the drive gear (23); One end of the main shaft (14) extends to the outside of the segmented cylinder, and the end of the main shaft (14) is connected to the driven gear (24), which meshes with the driving gear (23).

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