Tea classifying and screening device
The tea grading and screening device, which uses a transmission mechanism to break up tea clumps and a corrugated sieve plate, solves the problems of clogging and insufficient screening in tea screening devices, and achieves efficient and uniform tea grading and screening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI LONGHAO TEA CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional tea sorting devices suffer from low sorting efficiency, insufficient grading accuracy, and poor automation. They are also prone to clogging the feed inlet with tea clumps and incomplete sorting.
A tea grading and screening device was designed, which includes a transmission mechanism and a screening mechanism. The transmission mechanism breaks up tea clumps by rotating a fixed rod to avoid clogging, and the screening mechanism uses a wave-shaped sieve plate to extend the screening time and improve the grading accuracy.
It effectively avoids tea ball clogging, improves the smoothness of feeding and screening efficiency, ensures uniform grading and screening of tea leaves, and enhances the degree of automation.
Smart Images
Figure CN224253493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tea processing, and in particular to a tea grading and screening device. Background Technology
[0002] In the tea processing industry, tea grading and screening is a key step in ensuring product quality. Traditional tea screening usually relies on manual operation or simple screening equipment, which has problems such as low screening efficiency, insufficient grading accuracy and poor automation.
[0003] Chinese Patent Publication No. CN220590697U discloses a tea grading and screening device, including a screening box. The screening box contains two screen plates, one vertically aligned and connected by an elastic plate. The opposite ends of the two screen plates are connected by a connecting rod. A negative pressure fan is located at one location corresponding to the screening space of the first screen plate, and a negative pressure fan is located at one location corresponding to the screening space of the second screen plate. This tea grading and screening device connects adjacent screen plates via elastic plates, synchronizing the vibration frequencies of different screen plates. The tea leaves are spread out under their own weight and the vibration of the screen plates, sequentially screening tea particles of different sizes multiple times, achieving grading and screening while avoiding damage to the tea leaves, saving manpower and improving screening efficiency.
[0004] The aforementioned patent documents still have the following defects in practice:
[0005] Without a dispersing mechanism, tea clumps may block the feed inlet during feeding. The sieve is a straight plate, and the screening speed is too fast, which may result in insufficient screening. Utility Model Content
[0006] The main purpose of this invention is to provide a tea grading and screening device that can effectively solve the problems mentioned above.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] A tea grading and screening device includes a support frame, an outer shell fixedly connected to the upper part of the support frame, a feed hopper fixedly connected to the front upper end of the outer shell, two support plates fixedly connected to the rear end of the outer shell, a motor fixedly connected to the left side of the outer shell, a screening mechanism fixedly connected to the right end of the motor output end, a transmission mechanism fixedly connected to the outer surface of the motor output end, and a discharge hopper fixedly connected to the lower end of the outer shell.
[0009] Preferably, the inner surface of the feed hopper communicates with the inner cavity of the outer shell, the lower end of the discharge hopper is open, the inner cavity of the discharge hopper communicates with the inner cavity of the outer shell, and the rear end of the outer shell is provided with an opening.
[0010] Preferably, the transmission mechanism includes a pulley 1, the inner surface of the pulley 1 is fixedly connected to the outer surface of the motor output end, the outer surface of the pulley 1 is covered with a transmission belt, the end of the transmission belt away from the pulley 1 is wound with a pulley 2, the left end of the pulley 2 is rotatably connected to a fixed frame, the right end of the pulley 2 is fixedly connected to a transmission rod 1, and the outer surface of the transmission rod 1 is fixedly connected to several fixed rods 1.
[0011] Preferably, the right end of the transmission rod is rotatably connected to the right wall of the inner cavity of the feed hopper, and the end of the fixed frame away from the pulley is fixedly connected to the left end of the feed hopper.
[0012] Preferably, the screening mechanism includes a first corrugated screen plate, the left and right ends of which are slidably connected to the inner wall of the outer shell. Two connecting rods are fixedly connected to the middle of the lower end of the first corrugated screen plate, and the lower ends of the two connecting rods are fixedly connected to a second corrugated screen plate. Two fixing rods are fixedly connected to the middle of the lower end of the second corrugated screen plate. Springs are fixedly connected to the four corners of the lower end of the second corrugated screen plate, and fixing plates are fixedly connected to the lower ends of the springs. The screen holes of the first corrugated screen plate are larger than the screen holes on the second corrugated screen plate.
[0013] Preferably, the screening mechanism includes a second transmission rod, the left end of which is fixedly connected to the output end of the motor, and a cam is fixedly connected to the outer surface of the second transmission rod, with both cams located directly below the corresponding fixed rod.
[0014] Preferably, soft rubber strips are installed at both ends of the first corrugated screen plate, and the width of the front end of the first corrugated screen plate and the second corrugated screen plate is greater than the width of the rear end.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] 1. In this embodiment, a transmission mechanism is set up during implementation. The rotating fixed rod breaks up the tea clumps during feeding, preventing large pieces of tea from clogging the feed inlet or sieve holes and ensuring smooth feeding. The transmission rod drives the fixed rod to rotate, which also evenly distributes the tea leaves into the inner cavity of the outer shell, keeping the feeding speed from being too fast and preventing the tea leaves from accumulating above the screening mechanism. This provides a uniform material base for subsequent screening and improves screening efficiency.
[0017] 2. In this embodiment, a screening mechanism is set up. The front width of the first and second wave sieve plates is greater than that of the rear width. When the tea leaves move forward, the flow rate of the tea leaves is slowed down due to the reduced lateral space, thus extending the screening time of the tea leaves. The wave-shaped design extends the time of the tea leaves on the sieve plates, further improving the screening efficiency. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a partial structural cross-sectional view of the present invention;
[0020] Figure 3 This is a schematic diagram of the screening mechanism structure of this utility model;
[0021] Figure 4 This is a schematic diagram of the transmission mechanism structure of this utility model;
[0022] Figure 5 This is a schematic diagram of the overall structure of this utility model from another perspective.
[0023] In the diagram: 1. Bracket; 2. Outer shell; 3. Support plate; 4. Feed hopper; 5. Transmission mechanism; 51. Pulley 1; 52. Transmission belt; 53. Pulley 2; 54. Fixing frame; 55. Transmission rod 1; 56. Fixing rod 1; 6. Motor; 7. Screening mechanism; 71. Corrugated screen plate 1; 72. Corrugated screen plate 2; 73. Connecting rod; 74. Fixing rod 2; 75. Spring; 76. Fixing plate; 77. Transmission rod 2; 78. Cam; 8. Discharge hopper. Detailed Implementation
[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0025] Example 1, as Figures 1-2 As shown, a tea grading and screening device includes a support 1, an outer shell 2 fixedly connected to the upper part of the support 1, a feed hopper 4 fixedly connected to the front upper end of the outer shell 2, two support plates 3 fixedly connected to the rear end of the outer shell 2, a motor 6 fixedly connected to the left side of the outer shell 2, a screening mechanism 7 fixedly connected to the right end of the output end of the motor 6, a transmission mechanism 5 fixedly connected to the outer surface of the output end of the motor 6, and a discharge hopper 8 fixedly connected to the lower end of the outer shell 2. The inner surface of the feed hopper 4 communicates with the inner cavity of the outer shell 2, the lower end of the discharge hopper 8 is open, the inner cavity of the discharge hopper 8 communicates with the inner cavity of the outer shell 2, and the rear end of the outer shell 2 is provided with an opening.
[0026] In this embodiment, during the implementation process, the motor 6 is started, and the motor 6 drives the transmission mechanism 5 and the screening mechanism 7 to operate. The staff places the two collection frames on the top of the two support plates 3 respectively. The staff put the tea leaves into the upper part of the feed hopper 4 and they fall into the outer shell 2 through the feed hopper 4. The screened tea leaves fall into the collection frame from the rear end of the outer shell 2. The unqualified tea leaves and tea residues are collected in the discharge hopper 8 and fall into the waste frame from the lower end of the discharge hopper 8.
[0027] To maintain a continuous feed rate, please refer to [link / reference]. Figure 4The transmission mechanism 5 includes a pulley 51, the inner surface of which is fixedly connected to the outer surface of the output end of the motor 6. The outer surface of the pulley 51 is covered with a transmission belt 52. A pulley 53 is wound around the end of the transmission belt 52 away from the pulley 51. A fixed frame 54 is rotatably connected to the left end of the pulley 53. A transmission rod 55 is fixedly connected to the right end of the pulley 53. Several fixed rods 56 are fixedly connected to the outer surface of the transmission rod 55. The right end of the transmission rod 55 is rotatably connected to the right wall of the inner cavity of the feed hopper 4. The end of the fixed frame 54 away from the pulley 53 is fixedly connected to the left end of the feed hopper 4.
[0028] During implementation, motor 6 drives pulley 51 to rotate, which in turn drives pulley 53 to rotate via transmission belt 52. Pulley 53 drives transmission rod 55 to rotate, which in turn drives fixed rod 56 to rotate. The transmission rod 55 and fixed rod 56 work together to break up the tea clumps, preventing large pieces of tea from clogging the feed inlet or sieve holes. They also provide a forced pushing effect, evenly distributing the tea leaves into the inner cavity of the outer shell 2, stabilizing the feeding speed, and preventing the tea leaves from accumulating above the screening mechanism 7, which would affect the screening effect.
[0029] Example 2: For the purpose of selecting tea leaves, refer to... Figure 3 The screening mechanism 7 includes a first wave screen plate 71, which is slidably connected to the inner wall of the outer shell 2 at both ends. Two connecting rods 73 are fixedly connected to the middle of the lower end of the first wave screen plate 71. The lower ends of the two connecting rods 73 are fixedly connected to a second wave screen plate 72. Two fixing rods 74 are fixedly connected to the middle of the lower end of the second wave screen plate 72. Springs 75 are fixedly connected to the four corners of the lower end of the second wave screen plate 72. Fixing plates 76 are fixedly connected to the lower ends of the springs 75. The screen holes of the first wave screen plate 71 are larger than the screen holes on the second wave screen plate 72.
[0030] The screening mechanism 7 includes a second transmission rod 77. The left end of the second transmission rod 77 is fixedly connected to the output end of the motor 6. A cam 78 is fixedly connected to the outer surface of the second transmission rod 77. Both cams 78 are located directly below the corresponding fixed rod 74.
[0031] During implementation, motor 6 drives transmission rod 2 77, transmission rod 2 77 drives two cams 78 to rotate, cams 78 drive fixed rod 2 74 to move up and down, fixed rod 2 74 drives corrugated screen plate 2 72, corrugated screen plate 2 72 drives corrugated screen plate 1 71 to move up and down simultaneously through connecting rod 73, and spring 75 plays a buffering role on corrugated screen plate 1 71 and corrugated screen plate 2 72 moving up and down.
[0032] Tea leaves fall onto the corrugated screen plate 71. Tea leaves that meet the size requirements for the first layer remain on the upper part of the corrugated screen plate 71 and fall out from the rear end of the outer shell 2 as they are screened. Tea leaves that do not meet the size requirements fall through the sieve holes on the corrugated screen plate 71 to the upper part of the corrugated screen plate 72 for screening. Tea leaves that meet the size requirements for the second layer remain on the upper part of the corrugated screen plate 72 and fall out from the rear end of the outer shell 2 as they are screened. Unqualified tea leaves and tea residue fall into the discharge hopper 8 through the sieve holes on the corrugated screen plate 72. The design of the corrugated screen plate extends the tea screening time and improves the screening efficiency.
[0033] For further details, please refer to [link / reference]. Figure 3 The left and right ends of the corrugated screen plate 71 are equipped with soft rubber strips. The width of the front end of the corrugated screen plate 71 and the corrugated screen plate 72 is greater than the width of the rear end.
[0034] During implementation, the design of the corrugated sieve plate 1 (71) and corrugated sieve plate 2 (72) – wider at the front and narrower at the back – forces the tea leaves to slow down as they move forward due to the reduced lateral space, thus improving screening efficiency. Under the vibration of the sieve plates, large tea leaves move towards the edges due to inertia, while small tea leaves fall from the sieve holes to the lower layer, forming natural stratification and shortening the screening time. Soft rubber strips are installed at both ends of the corrugated sieve plate 1 (71) and corrugated sieve plate 2 (72) to prevent tea leaves from leaking out from both sides when the corrugated sieve plate 1 (71) and corrugated sieve plate 2 (72) move up and down.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A tea grading and screening device, comprising a support (1), characterized in that: The upper part of the bracket (1) is fixedly connected to the outer shell (2), the front part of the upper end of the outer shell (2) is fixedly connected to the feed hopper (4), the rear part of the outer shell (2) is fixedly connected to two support plates (3), the left part of the outer shell (2) is fixedly connected to the motor (6), the right end of the output end of the motor (6) is fixedly connected to the screening mechanism (7), the outer surface of the output end of the motor (6) is fixedly connected to the transmission mechanism (5), and the lower end of the outer shell (2) is fixedly connected to the discharge hopper (8).
2. The tea grading and screening device according to claim 1, characterized in that: The inner surface of the feed hopper (4) is connected to the inner cavity of the outer shell (2), the lower end of the discharge hopper (8) is open, the inner cavity of the discharge hopper (8) is connected to the inner cavity of the outer shell (2), and the rear end of the outer shell (2) is provided with an opening.
3. The tea grading and screening device according to claim 1, characterized in that: The transmission mechanism (5) includes a pulley (51), the inner surface of which is fixedly connected to the outer surface of the output end of the motor (6), the outer surface of which is covered with a transmission belt (52), and a pulley (53) is wound around the end of the transmission belt (52) away from the pulley (51). A fixed frame (54) is rotatably connected to the left end of the pulley (53), and a transmission rod (55) is fixedly connected to the right end of the pulley (53). Several fixed rods (56) are fixedly connected to the outer surface of the transmission rod (55).
4. The tea grading and screening device according to claim 3, characterized in that: The right end of the transmission rod (55) is rotatably connected to the right wall of the inner cavity of the feed hopper (4), and the end of the fixed frame (54) away from the pulley (53) is fixedly connected to the left end of the feed hopper (4).
5. A tea grading and screening device according to claim 2, characterized in that: The screening mechanism (7) includes a first wave screen plate (71), the left and right ends of which are slidably connected to the inner wall of the outer shell (2). Two connecting rods (73) are fixedly connected to the middle of the lower end of the first wave screen plate (71). The lower ends of the two connecting rods (73) are fixedly connected to a second wave screen plate (72). Two fixing rods (74) are fixedly connected to the middle of the lower end of the second wave screen plate (72). Springs (75) are fixedly connected to the four corners of the lower end of the second wave screen plate (72). A fixing plate (76) is fixedly connected to the lower end of the springs (75). The screen holes of the first wave screen plate (71) are larger than the screen holes on the second wave screen plate (72).
6. The tea grading and screening device according to claim 5, characterized in that: The screening mechanism (7) includes a transmission rod two (77), the left end of which is fixedly connected to the output end of the motor (6), and a cam (78) is fixedly connected to the outer surface of the transmission rod two (77). Both cams (78) are located directly below the corresponding fixed rod two (74).
7. The tea grading and screening device according to claim 5, characterized in that: The first wave sieve plate (71) is equipped with soft rubber strips at both ends. The width of the front end of the first wave sieve plate (71) and the second wave sieve plate (72) is greater than the width of the rear end.