Tea leaf screening and winnowing device

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By installing a guide plate, a pusher bar, and a blower assembly in the tea air separation device, the problem of insufficient air separation caused by tea accumulation is solved, achieving uniform falling of tea leaves and efficient air separation, thus improving tea processing efficiency.

CN224142832UActive Publication Date: 2026-04-21GUIZHOU TONGREN GUICHA TEA IND CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: GUIZHOU TONGREN GUICHA TEA IND CO LTD
Filing Date: 2024-12-10
Publication Date: 2026-04-21

AI Technical Summary

Technical Problem

Existing tea leaf air separation devices tend to accumulate tea leaves as they fall, resulting in insufficient air separation, reduced work efficiency, the need for multiple air separations, and extended processing time.

Method used

Design a tea sieving and air separation device. By setting a rotating shaft, a feeding rod, a drive motor and a control plate on the guide plate, tea leaves are evenly spread. The uniform falling of tea leaves and the air separation quality are ensured by the fan assembly, reciprocating cylinder and cam mechanism.

Benefits of technology

This technology enables the tea leaves to fall evenly and be separated by air, improving the accuracy and efficiency of air separation, ensuring that tea dust and whole tea leaves are collected separately, and improving processing efficiency.

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Abstract

The utility model provides a tea screening and winnowing device which comprises a winnowing box, a feeding hopper is arranged at the top of one end of the winnowing box, a material guide plate is obliquely arranged in the winnowing box, the high end of the material guide plate is located on one side of the feeding hopper, a material falling opening is formed between the low end of the material guide plate and the side wall of the winnowing box, and a rotating shaft is arranged between the two side walls of the winnowing box above the material guide plate. A plurality of material stirring rods are evenly arranged on the rotating shaft in the winnowing box at intervals in the length direction of the rotating shaft, a driving motor is arranged on the outer side wall of the winnowing box, the output end of the driving motor is connected with the rotating shaft on the outer side of the winnowing box, and a material control plate is obliquely arranged between the two side walls of the winnowing box on the side, close to the discharging opening, of the rotating shaft. The lower side of the lower end of the material guide plate is provided with a fan assembly blowing air towards the material falling opening, a partition plate is arranged at the position of the material falling opening in the front side of the fan assembly, the side, away from the fan assembly, of the partition plate is provided with a crushed material discharging groove, and the side, away from the crushed material discharging groove, of the partition plate is provided with a finished product discharging groove; the tea leaf winnowing device can ensure uniform falling of tea leaves, ensures winnowing accuracy and improves working efficiency.

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Description

Technical Field

[0001] This utility model belongs to the field of tea processing equipment, specifically relating to a tea sieving and air-separating device. Background Technology

[0002] During tea production, tea leaves break, forming tea dust. To maintain the integrity and aesthetics of the tea, this dust needs to be sorted. Since whole leaves have the greatest mass and tea dust has the smallest mass, air separation devices are typically used for sorting. These devices use airflow to separate tea leaves of varying weights. The sorted tea leaves need to be collected more effectively. However, in existing devices, the tea leaves fall directly from the feed hopper for air separation, resulting in a concentrated discharge process and potential tea leaf accumulation. This prevents the airflow fan from fully separating the tea leaves, potentially requiring multiple air separations, reducing efficiency, and extending processing time.

[0003] In view of this, in order to solve the above problems, this utility model proposes a tea leaf air separation device. This device can evenly spread tea leaves on the guide plate, so that the tea leaves fall evenly during air separation, ensuring the accuracy of air separation and thus ensuring the quality of air separation, and improving work efficiency. Summary of the Invention

[0004] This utility model provides a tea sieving and air-separating device that can evenly spread tea leaves on a guide plate, allowing the tea leaves to fall evenly during air separation, thus ensuring the accuracy and quality of air separation and improving work efficiency. The specific solution is as follows:

[0005] A tea leaf sieving and air-separating device includes an air-separating box. A feed hopper is located at the top of one end of the air-separating box. An inclined guide plate is installed inside the air-separating box, with its high end located on one side of the feed hopper. A discharge port is located between the low end of the guide plate and the side wall of the air-separating box. A rotating shaft is located between the two side walls of the air-separating box above the guide plate, with one end of the rotating shaft passing through the air-separating box and extending outwards. Several evenly spaced material-pulling rods are arranged along the length of the rotating shaft inside the air-separating box. A drive motor is installed on the outer wall of the air-separating box, and the output end of the drive motor is connected to the rotating shaft on the outer side of the air-separating box. A control plate is inclined between the two side walls of the air-separating box near the discharge port on the side of the rotating shaft. A fan assembly is located below the low end of the guide plate, blowing air towards the discharge port. A partition plate is located at the discharge port in front of the fan assembly. A crushed material discharge chute is located on the side of the partition plate away from the fan assembly, and a finished product discharge chute is located on the side of the partition plate away from the crushed material discharge chute.

[0006] Furthermore, the blower assembly includes a blower and an exhaust duct. The blower is located below the guide plate, and the exhaust duct is located between the two side walls of the air separator box near the partition plate. The exhaust duct is connected to the output end of the blower through a pipe. The exhaust duct has a trapezoidal cross-section, and its smaller end is located on the side of the discharge port.

[0007] Furthermore, the guide plate is rotatably connected to the wall of the air classifier box at one end of the feed hopper via a shaft pin. A shaft is horizontally provided on the lower side of the guide plate on one side of the discharge port. The shaft is rotatably arranged between the two side walls of the air classifier box, and one end of the shaft passes through the wall of the air classifier box and extends outward. Multiple cams are spaced on the shaft inside the air classifier box. A reciprocating cylinder is rotatably provided on the outer wall of the air classifier box. A connecting rod is fixedly connected to the shaft outside the air classifier box. The connecting rod is arranged perpendicular to the shaft, and the free end of the connecting rod is rotatably connected to the output end of the reciprocating cylinder.

[0008] Furthermore, the guide plate is provided with several through holes evenly spaced apart, and a waste discharge chute is inclinedly provided between the side walls of the air separator box on the lower side of the guide plate away from the discharge port.

[0009] Furthermore, telescopic springs are connected to both sides of the lower surface of the control plate and the guide plate respectively.

[0010] Furthermore, the feeding rod has an inverted L-shaped structure, and the end of the vertical part of the inverted L-shaped structure is perpendicularly connected to the rotating shaft.

[0011] The beneficial effects of this utility model are:

[0012] 1. The present invention relates to a tea sieving and air-separating device, which, through a rotating shaft set between the two side walls of the air-separating box above the guide plate, several material-pulling rods set on the rotating shaft, a drive motor and a control plate, allows the tea leaves to be evenly spread on the guide plate by the drive motor driving the material-pulling rods before the tea leaves enter the discharge port. Then, the control plate allows a small amount of tea leaves to fall into the discharge port, thereby blowing all the tea dust in the tea leaves into the crushed material discharge trough, thus improving the air-separation quality and improving work efficiency.

[0013] 2. This utility model discloses a tea sieving and air-separating device. By setting up a reciprocating cylinder, a shaft, multiple cams, and a connecting rod, when the reciprocating cylinder is started to move back and forth, the connecting rod is continuously pulled, causing the multiple cams on the shaft to make intermittent contact with the bottom surface of the guide plate, thereby causing the guide plate to shake continuously. This further ensures the uniformity of the tea leaves on the guide plate, thus further ensuring the quality of air separation. At the same time, the reciprocating motion of the multiple cams can also increase the speed at which the tea leaves fall, thereby effectively improving work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a top view of the present invention.

[0016] Figure 3 for Figure 2 Sectional view of AA.

[0017] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0018] Figure 5 and Figure 6 These are all partial schematic diagrams of the interior of the air separator of this utility model.

[0019] Figure 7 for Figure 6 Enlarged view of section C.

[0020] Figure 8 This is a bottom view of the interior of the air separator of this utility model.

[0021] Figure 9 This is a connection diagram of the drive motor, rotating shaft, and feeding rod of this utility model.

[0022] Figure 10 This is a connection diagram of the reciprocating cylinder and its connected components according to the present invention.

[0023] Figure 11 This is a diagram showing the connection between the material control plate and the telescopic spring of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Air separator box; 2. Feed hopper; 3. Guide plate; 4. Rotating shaft; 5. Feeding rod; 6. Drive motor; 7. Control plate; 8. Fan assembly; 801. Fan; 802. Exhaust duct; 9. Divider plate; 10. Crushed material discharge duct; 11. Finished product discharge duct; 12. Shaft pin; 13. Shaft rod; 14. Cam; 15. Reciprocating cylinder; 16. Connecting rod; 17. Through hole; 18. Waste material discharge duct; 19. Telescopic spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] See Figure 1-11A tea leaf sieving and air-separating device includes an air-separating box 1. A feed hopper 2 is located at the top of one end of the air-separating box 1. An inclined guide plate 3 is installed inside the air-separating box 1, with its high end located on one side of the feed hopper 2. A discharge port is located between the low end of the guide plate 3 and the side wall of the air-separating box 1. A rotating shaft 4 is installed between the two side walls of the air-separating box 1 above the guide plate 3, with one end of the rotating shaft 4 passing through the air-separating box 1 and extending outwards. Several evenly spaced material-pulling rods 5 are arranged along the length of the rotating shaft 4 inside the air-separating box 1. A drive motor 6 is installed on the outer wall of the air-separating box 1, with its output end connected to the rotating shaft 4 on the outer side of the air-separating box 1. The output end of the drive motor 6 rotates towards the discharge port. A control plate 7 is inclined between the two side walls of the air-separating box 1 near the discharge port of the rotating shaft 4. The bottom end of the control plate 7 is located above the guide plate 3, effectively preventing excessive tea leaves from passing through. A material discharge port is located on the lower side of the guide plate 3. The blower assembly 8 has a partition plate 9 at the material inlet on the front side of the blower assembly 8. A broken material discharge chute 10 is located on the side of the partition plate 9 away from the blower assembly 8, and a finished product discharge chute 11 is located on the side of the partition plate 9 away from the broken material discharge chute 10. In use, when the tea leaves are poured into the air separator box 1 from the feed hopper 2, the drive motor 6 and the blower assembly 8 are started at the same time. The tea leaves slide from the high end of the guide plate 3 to the low end. When they pass under the push rods 5, the drive motor 6 drives the rotation of several push rods 5. While pushing the material forward evenly, it can prevent a large amount of tea leaves from passing through. Then the tea leaves pass under the control plate 7 and finally fall down from the end of the guide plate 3. Since the quality of whole tea leaves and broken tea leaves is different, the blower assembly 6 can blow the broken tea leaves into the broken material discharge chute 10 and discharge them during the falling process, while the whole tea leaves fall down and are discharged through the finished product discharge chute 11.

[0027] The preferred fan assembly 8 includes a fan 801 and an exhaust duct 802. The fan 801 is located below the guide plate 3, and the exhaust duct 802 is located between the two side walls of the air separator 1 near the partition plate 9. The exhaust duct 802 is connected to the output end of the fan 801 through a pipe. The exhaust duct 802 has a trapezoidal cross-section, and its small end is located on the side of the discharge port.

[0028] The guide plate 3 is rotatably connected to the wall of the air classifier 1 at one end of the feed hopper 2 via a shaft pin 12. Pin holes suitable for the rotation of the shaft pin 12 are provided on both side walls of the air classifier 1. A shaft 13 is horizontally mounted on the lower side of the guide plate 3 on the discharge port side. The shaft 13 is rotatably mounted between the two side walls of the air classifier 1, with one end passing through the wall of the air classifier 1 and extending outwards. Multiple cams 14 are spaced and fitted onto the shaft 13 inside the air classifier 1. A reciprocating cylinder 15 is rotatably mounted on the outer wall of the air classifier 1. A connecting rod 16 is fixedly connected to the shaft 13 outside the air classifier 1, and the connecting rod 16 is perpendicular to the shaft 13. The connecting rod 16 is rotatably connected to the output end of the reciprocating cylinder 15. In use, the reciprocating cylinder 15 is started to perform reciprocating motion. The output end of the reciprocating cylinder 15 continuously pulls the connecting rod 16, causing multiple cams 14 on the shaft to intermittently contact the bottom surface of the guide plate 3, thereby causing the guide plate 3 to vibrate continuously. Through the continuous vibration of the guide plate 3 and the agitation of the tea leaves by several feeding rods 5, the uniformity of the tea leaves on the guide plate 3 is further ensured, thus further ensuring the quality of air separation. At the same time, the reciprocating motion of multiple cams 14 can also increase the speed at which the tea leaves fall, thereby effectively improving work efficiency.

[0029] The guide plate 3 has several through holes 17 evenly spaced apart. The side wall of the air separator 1, which is far from the discharge port, is inclined with a waste discharge chute 18. When the multiple cams 14 make the guide plate 3 vibrate continuously, the fine tea dust in the tea leaves can fall down from the through holes 17. This can further ensure the accuracy of the subsequent blower 802 blowing out the tea dust in the tea leaves and ensure the quality of the tea leaves.

[0030] Telescopic springs 19 are connected to the lower surface of the control plate 7 and the guide plate 3 on both sides. The setting of the telescopic springs 19 effectively ensures the stability of the guide plate 3 and enhances the vibration frequency of the guide plate 3.

[0031] The preferred material feeding rod 5 has an inverted L-shaped structure, and the end of the vertical part of the inverted L-shaped structure is perpendicularly connected to the rotating shaft 4.

[0032] The working principle of this utility model is as follows: First, tea leaves are poured from the feed hopper 2 into the air separator 1. Simultaneously, the control switches for the drive motor 6, reciprocating cylinder 15, and blower 801 are activated. At this time, the reciprocating cylinder 15 drives the shaft 13, causing multiple cams 14 on the shaft to reciprocate. This causes the guide plate 3 to vibrate up and down, allowing fine particles in the tea leaves to fall through several through holes 17 and be discharged through the waste discharge chute 18. When the tea leaves pass through several feeding rods 5, their horizontal sections evenly distribute the tea leaves while also providing… The system effectively prevents a large amount of tea leaves from passing through, providing precision for the subsequent blower 801 to blow out the tea dust from the tea leaves. Then, the tea leaves pass between the control plate 7 and the guide plate 3 and fall downwards from the end of the guide plate 3. During the falling process, the exhaust trough 802 between the two side walls of the air classifier box 1 and the output of the blower 801 cause the tea dust contained in the falling tea leaves to be blown towards the broken tea dust discharge trough 10 in front of the separator plate 9 and discharged through the broken tea dust discharge trough 10. The fallen whole tea leaves are discharged through the finished product discharge trough 11.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tea leaf screening and winnowing apparatus characterised in that: Includes an air classifier (1), with a feed hopper (2) at one top. An inclined guide plate (3) is provided inside the air classifier (1), with its high end located on one side of the feed hopper (2). A discharge port is provided between the low end of the guide plate (3) and the side wall of the air classifier (1). A rotating shaft (4) is provided between the two side walls of the air classifier (1) above the guide plate (3), with one end of the rotating shaft (4) passing through the air classifier (1) and extending outwards. Several feeding rods (5) are evenly spaced along the length of the rotating shaft (4) inside the air classifier (1). The outer wall of the air classifier (1)... A drive motor (6) is provided, and the output end of the drive motor (6) is connected to the rotating shaft (4) on the outside of the air classifier (1). A control plate (7) is inclined between the two side walls of the air classifier (1) near the discharge port of the rotating shaft (4). A fan assembly (8) blowing air towards the discharge port is provided on the lower side of the guide plate (3). A partition plate (9) is provided at the discharge port in front of the fan assembly (8). A crushed material discharge chute (10) is provided on the side of the partition plate (9) away from the fan assembly (8). A finished product discharge chute (11) is provided on the side of the partition plate (9) away from the crushed material discharge chute (10).

2. A tea leaf screening and winnowing apparatus as claimed in claim 1, wherein: The blower assembly (8) includes a blower (801) and an exhaust duct (802). The blower (801) is located below the guide plate (3). The exhaust duct (802) is located between the two side walls of the air separator (1) near the partition plate (9). The exhaust duct (802) is connected to the output end of the blower (801) through a pipe. The exhaust duct (802) has a trapezoidal cross-section, and its small end is located on the side of the discharge port.

3. The tea sieving and air-separating device according to claim 1, characterized in that: The guide plate (3) is rotatably connected to the wall of the air classifier (1) at one end of the feed hopper (2) via a shaft pin (12). A shaft (13) is horizontally provided on the lower side of the guide plate (3) on one side of the discharge port. The shaft (13) is rotatably arranged between the two side walls of the air classifier (1), and one end of the shaft (13) passes through the wall of the air classifier (1) and extends outward. Multiple cams (14) are spaced on the shaft (13) inside the air classifier (1). A reciprocating cylinder (15) is rotatably provided on the outer wall of the air classifier (1). A connecting rod (16) is fixedly connected to the shaft (13) outside the air classifier (1). The connecting rod (16) is arranged perpendicular to the shaft (13). The free end of the connecting rod (16) is rotatably connected to the output end of the reciprocating cylinder (15).

4. A tea leaf screening and winnowing apparatus as claimed in claim 1, wherein: The guide plate (3) is provided with several through holes (17) evenly spaced apart, and the waste discharge chute (18) is inclined between the side walls of the air separator (1) on the lower side of the guide plate (3) away from the discharge port.

5. A tea leaf screening and winnowing apparatus as claimed in claim 1, wherein: The lower surface of the control plate (7) is connected to the guide plate (3) on both sides by extension springs (19).

6. The tea sieving and air-separating device according to claim 1, characterized in that: The feeding rod (5) has an inverted L-shaped structure, and the end of the vertical part of the inverted L-shaped structure is perpendicularly connected to the rotating shaft (4).