Multi-stage screening device of tea leaf automatic picking machine
By designing a multi-stage screening device for an automated tea stem-picking machine, which utilizes wind and water power to separate tea stems and tea leaves, the problem of difficult tea stem screening is solved, thereby improving processing efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN MINDONG BLACK TEA TECHNOLOGY CO LTD
- Filing Date
- 2025-09-05
- Publication Date
- 2026-06-16
AI Technical Summary
Tea stems are difficult to effectively screen, which affects the efficiency of later processing and product quality, and poses risks of stems and leaves becoming entangled, broken, and moldy.
The design incorporates a multi-stage screening device for an automated tea stem-picking machine. This device utilizes wind and water power to separate tea stems and leaves. Density differences are separated using a blower and a collection trough. Tea stems are further collected using a screen and a water tank. The separation efficiency is further improved by combining a transmission belt and a dispersing plate.
It achieves efficient separation of tea stems and tea leaves, reduces manual cleaning workload, lowers the risk of tea leaf breakage, maintains the integrity and aroma of tea leaves, and prevents mold growth.
Smart Images
Figure CN224358591U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tea screening technology, and in particular to a multi-stage screening device for an automated tea stem-removing machine. Background Technology
[0002] Tea sorting is a crucial step in tea processing. Its purpose is to remove impurities, separate teas of different grades or types, and ensure the uniformity, purity, and commercial value of the finished tea. Tea sorting is a key link between primary processing and refining. The selection of techniques must be combined with the characteristics of the tea type, production scale, and cost budget to ultimately achieve the goals of removing impurities, grading, and improving quality.
[0003] In practical use, it has been found that if tea stems are not removed, they will have many negative impacts on subsequent processing (such as rolling, fermentation, drying, and refining) and the quality of the final product. For example, the hardness of the stems will prevent the leaves from being subjected to uniform force, causing the leaves to be over-compressed and broken. The stems and leaves will be tangled together, making the rolled tea leaves look messy and requiring extra manual sorting, which will reduce processing efficiency. Secondly, in a high-humidity processing environment, the areas where stems and leaves are piled up are prone to forming wet areas, which may lead to the risk of mold growth.
[0004] Therefore, we propose a multi-stage screening device for an automated tea stem-picking machine. Utility Model Content
[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0006] This utility model provides a multi-stage screening device for an automated tea stem-picking machine, which can solve the problem of difficult tea stem screening. The specific solution is as follows:
[0007] A multi-stage screening device for an automated tea stem-picking machine includes a screening box. The top of the screening box is connected to a feed inlet, and a blower is fixedly connected to one side of the screening box. The interior of the screening box is connected to a first collection trough and a second collection trough, and the second collection trough is equipped with a subdivision component. The top of the screening box is fixedly connected to a frame, a transmission belt is movably installed in the middle of the frame, a dispersing component is fixedly connected to the top of the frame, one end of the transmission belt is connected to an inclined plate, and one end of the inclined plate is connected to the edge of the feed inlet.
[0008] As a preferred technical solution of this utility model, the second collection trough is disposed on one side of the first collection trough. The second collection trough is used to collect tea leaves. Electric push rods are fixedly connected to both sides of the top of the second collection trough. A drain outlet is preset on one side of the bottom of the second collection trough.
[0009] As a preferred technical solution of this utility model, the subdivided component includes a sieve, and the sieve has several holes in the middle that prevent tea stems from passing through.
[0010] As a preferred technical solution of this utility model, a water tank is fixedly connected to the side wall of the screening box, a water pipe is connected to the top of the water tank, a water pump is preset at one end of the water pipe extending to the inside of the water tank, and the other end of the water pipe passes through the screening box and is set above the second collection trough.
[0011] As a preferred embodiment of this utility model, the dispersing component includes four sets of support rods, which are fixedly installed on the top wall of the frame, and a top plate is fixedly installed between the four sets of support rods. A motor is fixedly connected to the middle of the top plate.
[0012] As a preferred technical solution of this utility model, the output end of the motor passes through the top plate and is fixedly connected to the rotating rod. Both sides of the bottom end of the rotating rod are connected to connecting rods. Dispersion plates are provided at both ends of the two connecting rods. The dispersion plates have an arc-shaped structure, and a gap is reserved between the dispersion plates and the surface of the transmission belt.
[0013] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:
[0014] The tea leaves and stems are moved by a transmission belt and dispersed evenly by a dispersing plate before entering the screening box. The screening box is equipped with a blower and two collection troughs. The principle is that the density of tea stems is greater than that of leaves. Under the action of wind, the leaves are blown further away, while the stems fall closer, thus achieving separation. The tea stems fall into the first collection trough, and the tea leaves fall into the second collection trough, thereby achieving multi-stage screening.
[0015] In addition, by setting up a water tank and injecting water into the second collection trough (so that the tea leaves inside the second collection trough can be collected), some loose tea stems will rise with the buoyancy of the water and be collected by the upward movement of the screen, thus further ensuring the screening effect of the tea stems.
[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the internal structure of the screening box of this utility model;
[0020] Figure 3 This is a schematic diagram of the top plate structure of this utility model;
[0021] Figure 4 This is a schematic diagram of the material collection trough of this utility model;
[0022] The reference numerals in the attached figures are as follows:
[0023] 1. Screening box; 2. Feed inlet; 3. Blower; 4. Frame; 5. Top plate; 6. Transmission belt; 7. Water tank; 8. Motor; 9. Support rod; 10. Connecting rod; 11. Rotating rod; 12. Dispersing plate; 13. Electric push rod; 14. Screen; 15. Collection trough two; 16. Collection trough one. Detailed Implementation
[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.
[0025] See Figures 1-4 This utility model provides a multi-stage screening device for an automated tea stem picking machine, including a screening box 1, a feed inlet 2 connected to the top of the screening box 1, a blower 3 fixedly connected to one side of the screening box 1, a collection trough 16 and a collection trough 15 connected inside the screening box 1 respectively, and a subdivision component set inside the collection trough 15; a frame 4 fixedly connected to the top of the screening box 1, a transmission belt 6 movably set in the middle of the frame 4, a dispersing component fixedly connected to the top of the frame 4, an inclined plate connected to one end of the transmission belt 6, and an edge of the inclined plate connected to one side of the feed inlet 2;
[0026] The screening box 1 is equipped with a blower 3 and two collection troughs, 16 and 15. The principle is that the density of tea stems is greater than that of leaves. Under the action of wind, the leaves are blown further away, while the stems fall closer, thus achieving separation. The tea stems fall into the first collection trough, and the tea leaves fall into the second collection trough, thereby achieving multi-stage screening. Compared with manual picking, air separation can separate more than 90% of tea stems and impurities at one time, greatly reducing the workload of subsequent manual cleaning. Air separation separates materials through airflow, without relying on screen friction like screening methods or high-speed jet impact like color sorting. It can minimize tea breakage and maintain the integrity of the leaves. The flavor substances such as tea polyphenols and amino acids in tea are easily oxidized and lost due to mechanical compression. The "non-contact" separation method of air separation can reduce such losses and retain the freshness and aroma of tea.
[0027] The second collection trough 15 is located on one side of the first collection trough 16. The second collection trough 15 is used to collect tea leaves. Electric push rods 13 are fixedly connected to both sides of the top of the second collection trough 15. A drain outlet is preset on one side of the bottom of the second collection trough 15.
[0028] The subdivided components include a sieve 14, with several mesh openings in the middle of the sieve 14 to prevent tea stems from passing through.
[0029] A water tank 7 is fixedly connected to the side wall of the screening box 1. A water pipe is connected to the top of the water tank 7. A water pump is preset at one end of the water pipe extending to the inside of the water tank 7. The other end of the water pipe passes through the screening box 1 and is set above the collection trough 15. In actual use, when the water inside the water tank 7 needs to be used, the tea leaves inside the collection trough 15 need to be collected first (leaving some impurities such as broken tea leaves and tea stems). Then, the electric push rod 13 is started to drive the screen 14 to move upward. Since the middle of the screen 14 is equipped with several meshes that tea stems cannot pass through, the tea stems can be intercepted on the surface of the screen 14 for later collection.
[0030] The dispersing component includes four sets of support rods 9, which are fixedly installed on the top wall of the frame 4, and a top plate 5 is fixedly installed between the four sets of support rods 9. A motor 8 is fixedly connected to the middle of the top plate 5.
[0031] The output end of the motor 8 passes through the top plate 5 and is fixedly connected to the rotating rod 11. The bottom ends of the rotating rod 11 are connected to the connecting rods 10 on both sides. The two ends of the connecting rods 10 are provided with dispersing plates 12. The dispersing plates 12 have an arc-shaped structure and a gap is reserved between the dispersing plates 12 and the surface of the transmission belt 6. When in use, a large amount of tea leaves are first placed on the surface of the transmission belt 6 and moved with the drive of the transmission belt 6. At this time, the motor 8 is started to drive the two sets of dispersing plates 12 at the bottom to rotate, so that the clump of tea leaves can be broken up so that they can enter the interior of the feed inlet 2 more evenly.
[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0033] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0034] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.
[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A multi-stage screening device for an automated tea stem-picking machine, characterized in that: The screen includes a screening box (1), the top of which is connected to a feed inlet (2), a blower (3) is fixedly connected to one side of the screening box (1), and a collection trough (16) and a collection trough (15) are connected inside the screening box (1), with a subdivision component inside the collection trough (15); a frame (4) is fixedly connected to the top of the screening box (1), a transmission belt (6) is movably installed in the middle of the frame (4), a dispersing component is fixedly connected to the top of the frame (4), one end of the transmission belt (6) is connected to an inclined plate, and one end of the inclined plate is connected to one side of the edge of the feed inlet (2).
2. The multi-stage screening device of the automated tea stem-picking machine as described in claim 1, characterized in that: The second collection trough (15) is located on one side of the first collection trough (16). The second collection trough (15) is used to collect tea leaves. Electric push rods (13) are fixedly connected to both sides of the top of the second collection trough (15). A drain outlet is preset on one side of the bottom of the second collection trough (15).
3. The multi-stage screening device of the automated tea stem-picking machine as described in claim 2, characterized in that: The subdivided component includes a sieve (14), which has several openings in the middle that prevent tea stems from passing through.
4. The multi-stage screening device of the automated tea stem-picking machine as described in claim 1, characterized in that: A water tank (7) is fixedly connected to the side wall of the screening box (1). A water pipe is connected to the top of the water tank (7). A water pump is preset at one end of the water pipe extending to the inside of the water tank (7). The other end of the water pipe passes through the screening box (1) and is located above the collection trough (15).
5. The multi-stage screening device for the automated tea stem-picking machine as described in claim 1, characterized in that: The dispersing component includes four sets of support rods (9), which are fixedly installed on the top wall of the frame (4), and a top plate (5) is fixedly installed between the four sets of support rods (9). A motor (8) is fixedly connected to the middle of the top plate (5).
6. The multi-stage screening device of the automated tea stem-picking machine as described in claim 5, characterized in that: The output end of the motor (8) passes through the top plate (5) and is fixedly connected to the rotating rod (11). The bottom ends of the rotating rod (11) are connected to the connecting rods (10) on both sides. The two ends of the connecting rods (10) are provided with dispersion plates (12). The dispersion plates (12) are arc-shaped, and a gap is reserved between the dispersion plates (12) and the surface of the transmission belt (6).