Device for screening out crushed tea

Abstract

The utility model discloses a device for screening out crushed tea, and relates to the technical field of tea processing equipment, and the scheme is that the device for screening out the crushed tea comprises a crushed material screening shell; the partition plate is mounted in the crushed material screening shell, and the crushed material screening shell is divided into a crushed material screening area and a power control area which are independent from each other by the partition plate; the main screening roller is rotationally installed in the crushed material screening shell, the main screening roller penetrates through the partition plate, and a plurality of main screening material through holes are formed in the position, in the crushed material screening falling area, of the main screening roller; the aperture adjusting roller is arranged on the inner side of the main screening roller in a sleeving mode, a plurality of diameter adjusting auxiliary screening holes are formed in the portion, in the crushed material screening area, of the aperture adjusting roller, and the aperture adjusting roller can rotate by a preset angle relative to the main screening roller; the aperture of the roller can be dynamically adjusted to adapt to different types of tea forms, the screening efficiency and the purity of finished products are greatly improved, and material loss is reduced.

Description

Technical Field

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

[0002] Removing tea leaf fragments is crucial for ensuring quality and optimizing the customer experience. Visually, fragments detract from the overall appearance of the tea; removing them enhances the product's visual appeal and increases its market attractiveness. In terms of taste, fragments have a large surface area, leading to a rapid release of substances during brewing, which can result in bitterness and an imbalanced tea concentration. Preserving whole tea leaves allows for a more even release of aroma and flavor, resulting in a richer, more mellow taste. During processing and packaging, fragments can clog equipment, affecting production efficiency and causing irregular packaging and dust pollution. Furthermore, whole tea leaves are more resistant to spoilage during storage and transportation, while fragments easily absorb moisture and odors, accelerating deterioration; removing fragments effectively extends shelf life.

[0003] A tea leaf debris screening device disclosed in authorization announcement number (CN222724784U) includes a housing with a rotating cylinder rotatably mounted inside. After the equipment is started, a motor drives the turntable to rotate, which in turn causes a rack to perform periodic linear reciprocating motion via a connecting rod. The rack meshes with a transmission gear, driving the rotating cylinder to rotate alternately clockwise and counterclockwise. Tea leaves fall into the rotating cylinder through the inlet. During the tumbling process, debris is screened out through the through-holes on the cylinder surface and collected by a drawer; whole tea leaves are discharged from the outlet along the inclined cylinder body, achieving efficient separation of debris and tea leaves.

[0004] The fixed size of the through holes on the surface of the rotating drum in this patent has significant limitations. Due to the vast differences in the morphology of different tea varieties—for example, the delicate buds and leaves of Biluochun tea are slender, while the leaves of Pu'er compressed tea are robust after being broken up—a fixed hole size cannot accommodate the diverse characteristics of teas. If the sieve holes are too large, some qualified tea leaves may fall through the drum along with the broken pieces and be collected, resulting in a reduced amount of qualified tea leaves in the final collection, causing material waste and reducing screening efficiency. If the sieve holes are too small, unqualified broken pieces cannot pass through the drum, and more broken pieces will be intercepted inside the drum and transported to one side for collection along with the tea leaves, thus affecting the purity of the finished product and failing to meet the needs of tea processing enterprises for precise screening of different types of tea. Utility Model Content

[0005] The purpose of this invention is to provide a device for sieving tea leaf fragments. It addresses the problem in the existing technology where the screen aperture is fixed, making it difficult to adapt to the different shapes of various tea varieties, resulting in low sieving efficiency, material waste, or insufficient purity of the finished product. The device can achieve dynamic adjustment of the drum aperture to adapt to different tea varieties, greatly improving sieving efficiency and purity of the finished product, and reducing material loss.

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

[0007] A device for screening tea leaf fragments includes: a fragment screening shell; a partition plate installed inside the fragment screening shell, dividing the shell into an independent fragment screening area and a power control area; a main screening drum rotatably installed inside the shell, passing through the partition plate, and having multiple main screening holes in the fragment screening area; an aperture adjustment drum fitted inside the main screening drum, having multiple auxiliary apertures in the fragment screening area, capable of rotating at a preset angle relative to the main screening drum, thereby achieving dynamic adjustment of the effective aperture of the main screening holes by misaligning and overlapping the auxiliary apertures with the main screening holes; and a spiral guide vane installed along the extension direction on the inner wall of the aperture adjustment drum; and a power drive assembly installed in the power control area, capable of driving the main screening drum to rotate.

[0008] Furthermore, in this utility model, the aforementioned aperture adjusting roller includes an adapter execution section and a rotating connection section, the adapter execution section and the rotating connection section being rotatably connected; the inner wall of the main screening roller is provided with multiple limiting slots along the circumferential direction, all of which are located within the power control area; the end of the main screening roller is provided with multiple diameter adjustment positioning slots along the circumferential direction; the outer wall of the rotating connection section is provided with multiple limiting tenons along the circumferential direction, each of which engages with a limiting slot; an aperture adjustment component is installed at the end of the adapter execution section away from the rotating connection section; wherein, the aperture adjustment component can engage with the multiple diameter adjustment positioning slots respectively, thereby adjusting the effective aperture of the main screen material passage.

[0009] Furthermore, in this utility model, the aperture control component includes a positioning base plate and a limiting pin; the positioning base plate is installed at the end of the adapter execution section, and the positioning base plate has a mating guide hole adapted to the diameter adjustment positioning groove; wherein, the limiting pin can be inserted into the mating guide hole and one of the diameter adjustment positioning grooves in sequence, thereby driving the adapter execution section to generate a preset angle of rotational displacement relative to the main screening drum.

[0010] Furthermore, in this utility model, the end of the aforementioned rotating connecting section is provided with a guide flange along the circumferential direction, and the outer wall of the guide flange is provided with a guide rail groove along the circumferential direction; the end of the adapting execution section is provided with a constraint sleeve along the circumferential direction, and the inner wall of the constraint sleeve is provided with an fitting member along the circumferential direction; the constraint sleeve is fitted onto the outer side of the guide flange, and the fitting member is fitted into the guide rail groove.

[0011] Furthermore, in this utility model, the aforementioned power drive assembly includes a gear ring, a motor, a transmission gear, and a power base; the power base is installed in the power control area, the motor is installed on the power base, and the output end of the motor is connected to the transmission gear; the gear ring is fitted onto the outer wall of the main screening drum, and the gear ring meshes with the transmission gear.

[0012] Furthermore, in this utility model, the lower side of the aforementioned crushed material screening shell is provided with a crushed material discharge port that communicates with the crushed material screening drop area, and a crushed material collection box is detachably installed inside the crushed material discharge port.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] 1. The device of this application, through its adjustable sieve aperture design (such as the aperture adjustment drum cooperating with the main sieve drum, changing the effective aperture of the sieve through relative rotation of the two), can flexibly adapt to the characteristics of different teas, achieve precise sieve separation, and meet the diverse needs of tea processing enterprises for different types of tea.

[0015] 2. The device of this application can ensure that unqualified broken materials are screened out in a timely manner by precisely adjusting the size of the sieve holes, thus ensuring that the final collected tea product has a high purity, improving product quality and enhancing market competitiveness.

[0016] 3. The device of this application can precisely adjust the size of the sieve holes according to the actual condition of the tea leaves, effectively avoiding the sieving of qualified tea leaves, reducing material waste, improving the utilization rate of tea leaves, and reducing production costs. Attached Figure Description

[0017] 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:

[0018] Figure 1 A perspective view of a device for sieving out tea leaf fragments;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a cross-sectional view of the crushed material screening shell;

[0021] Figure 4 A sectional view of the main screening drum;

[0022] Figure 5 This is the front view of the aperture adjusting roller.

[0023] The attached diagram shows the markings and corresponding component names:

[0024] 1-Scrap screening shell, 2-Scrap discharge port, 3-Scrap collection box, 4-Main screening drum, 5-Aperture adjustment drum, 6-Diameter adjustment positioning groove, 7-Positioning base plate, 8-Matching guide hole, 9-Limiting pin, 10-Divider plate, 11-Main screen material passage hole, 12-Diameter adjustment auxiliary screen hole, 13-Scrap screen drop area, 14-Power control area, 15-Gear ring, 16-Power base, 17-Motor, 18-Transmission gear, 19-Rotating connection section, 20-Adaptive execution section, 21-Limiting tenon, 22-Limiting slot. Detailed Implementation

[0025] 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.

[0026] Example

[0027] Please refer to Figures 1 to 3 This utility model provides a device for screening tea leaf fragments. The device is based on a fragment screening housing 1. The interior of the fragment screening housing 1 is divided by a partition plate 10 into an independent fragment screening area 13 and a power control area 14, ensuring that screening and the power system do not interfere with each other. The core of the device adopts a double-drum screening structure. The main screening drum 4 passes through the partition plate 10 and is rotatably installed inside the housing. Both ends of the main screening drum 4 extend to the outside of the housing to form an inlet and an outlet. The two sides of the main screening drum 4 are rotatably connected to the fragment screening housing 1 via bearings. The main screening drum 4 has multiple main screening holes 11 in the fragment screening area 13. An aperture adjustment drum 5 is coaxially fitted inside the main screening drum 4 and can rotate relative to it. The inner wall of the aperture adjustment drum 5 is equipped with spiral guide vanes, and the aperture adjustment drum 5 has auxiliary screen holes 12 corresponding to the main screening holes 11.

[0028] Under the dynamic aperture adjustment mechanism, the aperture adjustment roller 5 can rotate at a certain angle relative to the main screening roller 4, causing the aperture adjustment auxiliary screen hole 12 and the main screen material passage hole 11 to overlap in a staggered manner. When the two holes are fully aligned, the main screen material passage hole 11 reaches its maximum effective aperture, which is suitable for screening large tea particles; as the two holes gradually become misaligned, the effective aperture of the main screen material passage hole 11 gradually decreases, enabling fine screening of small tea particles, thus flexibly adapting to the screening needs of different specifications of tea.

[0029] The power drive assembly is installed in the power control area 14, and drives the main screening drum 4 to rotate. When the main screening drum 4 rotates, it drives the aperture adjustment drum 5 to run synchronously, and the spiral guide vanes push the tea leaves from the feed inlet to the discharge outlet. During the conveying process, under the action of centrifugal force and gravity, the tea leaf fragments fall into the fragment screening area 13 through the effective aperture of the main screen's material passage 11, while the whole tea leaves are discharged from the discharge outlet, achieving efficient and precise fragment screening and tea leaf separation.

[0030] Please refer to Figure 4 and Figure 5 In some embodiments of this application, the aperture adjusting roller 5 consists of an adapter execution section 20 and a rotating connection section 19, which can rotate relative to each other. Multiple limiting slots 22 are evenly distributed around the inner wall of the main screening roller 4 in the power control area 14, and multiple diameter adjusting positioning slots 6 are provided at the end of the main screening roller 4 along the circumferential direction. This design provides a positioning reference and motion constraint for effective aperture adjustment.

[0031] Multiple limiting tenons 21 are correspondingly provided on the outer wall of the rotating connecting section 19, forming a nested fit with multiple limiting slots 22 of the main screening roller 4. The rotating connecting section 19 and the main screening roller 4 remain relatively fixed, effectively preventing movement during the screening process and ensuring the stability of power transmission. An aperture adjustment component is installed at one end of the adapter execution section 20, which can be connected with the corresponding diameter adjustment positioning groove 6 at the end of the main screening roller 4; the diameter adjustment auxiliary screen holes 12 evenly distributed on the surface of the adapter execution section 20, together with the main screen passage hole 11 of the main screening roller 4, constitute a dynamic screening unit.

[0032] During the screening process, the rotating connecting section 19 remains stationary due to the engagement of the limiting tenon 21 and the limiting slot 22, while the adapting execution section 20 can rotate relative to the rotating connecting section 19. As the adapting execution section 20 rotates, the diameter adjustment auxiliary screen hole 12 and the main screen material passage hole 11 are misaligned and superimposed, achieving stepless adjustment of the effective aperture. When rotated to the preset angle, the aperture control component and the corresponding diameter adjustment positioning groove 6 are limited and fixed, firmly locking the relative position of the main screening roller 4 and the adapting execution section 20, thereby achieving precise screening of tea of ​​different types and specifications, effectively improving screening efficiency and processing accuracy.

[0033] Please refer to Figure 2In some embodiments of this application, the aperture adjustment component consists of a positioning base plate 7 and a limiting pin 9, achieving precise positioning of the adapter execution section 20 and the main screening roller 4, as well as flexible dynamic angle adjustment, providing a strong guarantee for the precise control of the tea sieving aperture. The positioning base plate 7 is securely installed at the end of the adapter execution section 20. A mating guide hole 8 adapted to the diameter adjustment positioning groove 6 is formed on the surface of the positioning base plate 7. In actual operation, the limiting pin 9 can sequentially pass through the mating guide hole 8 of the positioning base plate 7 and the diameter adjustment positioning groove 6 of the main screening roller 4.

[0034] The specific operating procedure is as follows: In the initial state, the positioning base plate 7 extends to the end of the main screening roller 4. At this time, its mating guide hole 8 can correspond to the multiple diameter adjustment positioning grooves 6 at the end of the main screening roller 4, forming a coaxial relationship. When it is necessary to fix the effective screening aperture, the operator only needs to insert the limiting pin 9 into the mating guide hole 8 and the selected diameter adjustment positioning groove 6 to achieve a rigid connection between the adapter execution section 20 and the main screening roller 4. In this way, the relative position of the diameter adjustment auxiliary screen hole 12 and the main screen material passage hole 11 is firmly locked, effectively ensuring the stability of the screening aperture.

[0035] If adjustment of the effective screening aperture is required, the operator simply needs to pull out the limit pin 9. At this time, the adapter execution section 20 can rotate freely relative to the main screening drum 4. The operator can rotate the adapter execution section 20 according to actual needs, thereby adjusting the misalignment between the diameter adjustment auxiliary screen hole 12 and the main screen material passage hole 11, achieving flexible adjustment of the effective screening aperture. After adjusting to the target aperture, the operator then re-inserts the limit pin 9 into the corresponding diameter adjustment positioning groove 6 and the matching guide hole 8 to complete a new round of angle locking, ensuring that the aperture size remains accurate throughout the subsequent screening process.

[0036] In some embodiments of this application, a guide flange is provided at the end of the rotating connecting section 19 along the circumferential direction. A guide groove is formed on the outer wall of the guide flange along the circumferential direction. A constraint sleeve is provided at the end of the adapting execution section 20 along the circumferential direction. A fitting member is provided on the inner wall of the constraint sleeve along the circumferential direction. The shape of the fitting member perfectly matches the guide groove, forming a tight sliding fit, ensuring good working condition even during long-term frequent rotation.

[0037] During assembly, the constraint sleeve is fitted onto the outside of the guide flange, forming a stable nested structure. The fitting is tightly fitted into the guide rail groove, providing precise guidance for the rotation of the adapter actuator 20. This design effectively prevents radial offset and wobbling between the adapter actuator 20 and the rotating connection section 19 during rotation, ensuring the stability and reliability of the entire aperture adjusting roller 5.

[0038] From a spatial layout perspective, the guide flange is positioned on the inner side of the end of the rotating connecting section 19, while the constraint sleeve is installed on the outer side of the end of the adapting execution section 20. This layout design ensures that the overall thickness of the guide flange and constraint sleeve, when combined, is consistent with the thickness of the rotating connecting section 19 and the adapting execution section 20. This creates a flat and continuous conveying channel inside the aperture adjusting roller 5, avoiding steps or protrusions caused by structural differences. Tea leaves can be conveyed stably and smoothly within this channel, greatly reducing the possibility of blockages and accumulation, thereby significantly improving the working efficiency and screening quality of the tea sieving device.

[0039] Please refer to Figure 3 In some embodiments of this application, the power drive assembly mainly consists of a gear ring 15, a motor 17, a transmission gear 18, and a power base 16. These components work closely together to provide stable power support for the entire screening process. The power base 16 serves as the basic support structure for the entire power drive assembly and is securely mounted within the power control area 14 using bolts. The motor 17 is a high-performance servo motor, tightly connected to the power base 16 via shock-absorbing pads. The transmission gear 18 is keyed to the output end of the motor 17, ensuring efficient and stable power transmission.

[0040] The gear ring 15 is tightly fitted onto the outer wall of the main screening drum 4. An interference fit is used between the gear ring 15 and the main screening drum 4, ensuring that no relative slippage occurs during operation and guaranteeing accurate power transmission. The tooth profile of the gear ring 15 perfectly matches the tooth profile of the transmission gear 18, forming a precise meshing relationship. Driven by the motor 17, the transmission gear 18 rotates the gear ring 15, thereby driving the main screening drum 4 to rotate smoothly, achieving efficient tea sieving.

[0041] Please refer to Figure 3 In some embodiments of this application, a crushed material discharge port 2 is provided on the lower side of the crushed material screening shell 1. The crushed material discharge port 2 is directly connected to the internal crushed material screening area 13, allowing the screened crushed material to be discharged smoothly. A crushed material collection box 3 is detachably installed inside the crushed material discharge port 2. The shape of the crushed material collection box 3 is adapted to the discharge port, and it is seamlessly connected after installation, effectively preventing crushed material leakage. When the crushed material collection box 3 reaches its capacity threshold, the operator can pull out the crushed material collection box 3 and then perform a cleaning operation. After cleaning, the crushed material collection box 3 is installed back into the crushed material discharge port 2.

[0042] 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 device for sieving out tea leaf fragments, characterized in that, include: Crushed material screening shell (1); A partition plate (10) is installed inside the crushed material screening shell (1). The partition plate (10) divides the crushed material screening shell (1) into an independent crushed material screening area (13) and a power control area (14). The main screening drum (4) is rotatably installed inside the crushed material screening shell (1). The main screening drum (4) passes through the partition plate (10). The main screening drum (4) has multiple main screening holes (11) in the crushed material screening area (13). A diameter adjusting roller (5) is fitted inside the main screening roller (4). The diameter adjusting roller (5) has multiple diameter adjusting auxiliary screen holes (12) in the crushed material screening area (13). The diameter adjusting roller (5) can rotate at a preset angle relative to the main screening roller (4), so that the diameter adjusting auxiliary screen holes (12) and the main screen material passage hole (11) are misaligned and superimposed, realizing the dynamic adjustment of the effective diameter of the main screen material passage hole (11). The inner wall of the diameter adjusting roller (5) is equipped with a spiral guide vane along the extension direction. A power drive assembly is installed in the power control area (14) and is capable of driving the main screening drum (4) to rotate.

2. The apparatus for sieving tea leaf fragments according to claim 1, characterized in that, The aperture adjusting roller (5) includes an adapter execution section (20) and a rotating connection section (19), wherein the adapter execution section (20) and the rotating connection section (19) are rotatably connected; The inner wall of the main screening drum (4) is provided with multiple limiting slots (22) along the circumferential direction. All of the multiple limiting slots (22) are located in the power control area (14). The end of the main screening drum (4) is provided with multiple diameter adjustment positioning slots (6) along the circumferential direction. The outer wall of the rotating connecting section (19) is provided with a plurality of limiting tenons (21) along the circumferential direction. The plurality of limiting tenons (21) and the plurality of limiting slots (22) are respectively limited and matched. The end of the adapter execution section (20) away from the rotating connecting section (19) is equipped with a aperture adjustment component. The aperture control component can cooperate with multiple aperture positioning grooves (6) to adjust the effective aperture of the main screen feed hole (11).

3. The apparatus for sieving tea leaf fragments according to claim 2, characterized in that, The aperture control component includes a positioning base plate (7) and a limiting pin (9); The positioning base plate (7) is installed at the end of the adapter execution section (20), and the positioning base plate (7) has a mating guide hole (8) that is adapted to the diameter adjustment positioning groove (6); The limiting pin (9) can be inserted into the mating guide hole (8) and one of the diameter adjustment positioning grooves (6) in sequence, thereby driving the adapter execution section (20) to generate a preset angle of rotational displacement relative to the main screening drum (4).

4. The apparatus for sieving tea leaf fragments according to claim 2, characterized in that, The end of the rotating connecting section (19) is provided with a guide flange along the circumferential direction, and the outer wall of the guide flange is provided with a guide groove along the circumferential direction. The end of the adapter execution section (20) is provided with a constraint sleeve along the circumferential direction, and the inner wall of the constraint sleeve is provided with a fitting member along the circumferential direction. The constraint sleeve is fitted onto the outside of the guide flange, and the fitting is fitted into the guide rail groove.

5. The apparatus for sieving tea leaf fragments according to any one of claims 1 to 4, characterized in that, The power drive assembly includes a gear ring (15), a motor (17), a transmission gear (18), and a power base (16); The power base (16) is installed in the power control area (14), the motor (17) is installed on the power base (16), and the output end of the motor (17) is connected to the transmission gear (18); The toothed ring (15) is fitted onto the outer wall of the main screening drum (4), and the toothed ring (15) meshes with the transmission gear (18).

6. The apparatus for sieving tea leaf fragments according to any one of claims 1 to 4, characterized in that, The lower side of the crushed material screening shell (1) is provided with a crushed material discharge port (2) that communicates with the crushed material screening drop area (13), and a crushed material collection box (3) is detachably installed in the crushed material discharge port (2).

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