Tea leaf drying and screening apparatus

Abstract

The utility model discloses a kind of tea leaf drying screening equipment, including frame body, air cylinder and material box, air cylinder one end is equipped with installation cylinder, motor is installed outside installation cylinder, motor output shaft connects wind oar, can form airflow in air cylinder interior;Material box is located at the top of air cylinder and is through with it, lower is equipped with vibrating frame, vibrating frame inside distributes loose material rod, vibrating frame is connected with motor drive structure by push rod, connecting rod and extrusion slide plate, reciprocating vibration is realized under motor drive, and it is dispersed to the tea leaf falling, prevent jam;Air cylinder bottom is equipped with multiple distribution groove, distribution groove bottom is equipped with inclined row discharge plate, for different weight material is collected in stage;Air cylinder other end installs net board, for blocking chip exudation.This equipment can realize uniform discharging, grading screening and synchronous drying in tea leaf screening process, avoid jam, improve sorting accuracy, and effectively improve working environment.

Description

Technical Field

[0001] This utility model belongs to the field of tea screening technology, specifically relating to a tea drying and screening device. Background Technology

[0002] During the picking, initial processing, and further processing of tea leaves, drying and screening processes are typically required to remove impurities, grade the tea leaves, and improve the uniformity of the overall product. Current tea screening methods mainly employ manual sieving or simple screening machines for separation, but these methods often suffer from low efficiency, high labor intensity, and limited screening accuracy. Especially in the drying process, some equipment cannot simultaneously process the tea leaves; that is, the lack of effective airflow and vibration assistance during screening easily leads to tea leaves mixing with impurities, affecting the final quality.

[0003] In existing technologies, airflow sorting methods can use wind power to separate tea leaves from impurities to a certain extent. However, due to the varying weights of tea leaves, fragments, sand, and leaves often fall together, resulting in low sorting accuracy. Furthermore, some equipment lacks an effective material unloading mechanism during the sorting process, causing tea leaves to accumulate and clog during their descent, hindering material flow and reducing overall processing efficiency.

[0004] Furthermore, the existing equipment suffers from poorly designed vibration structures, often failing to effectively disperse falling tea leaves and causing material to accumulate at the discharge port, thus affecting the air-separation effect. Moreover, some screening equipment lacks a drying function, resulting in tea leaves still having high moisture content during air separation, requiring an additional drying process, which not only increases energy consumption but also extends the production cycle.

[0005] In summary, existing tea sorting equipment generally suffers from the following technical problems: First, tea leaves are prone to clogging during the falling process, and there is a lack of an effective vibration and material dispersing structure; second, the air-powered sorting accuracy is insufficient, making it difficult to accurately distinguish between tea fragments, sand and gravel impurities, and whole tea leaves; third, the equipment lacks the function of drying simultaneously during the sorting process, resulting in low tea processing efficiency. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a tea drying and screening device that can reduce clogging of tea during the drying process and accurately classify the tea.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A tea drying and screening device includes a frame, a wind duct is provided on the top of the frame, the wind duct is open at the front and back, a mounting cylinder is provided at one end of the wind duct, a motor is installed on the outside of the mounting cylinder, a propeller is installed on the output shaft of the motor, and the propeller is placed inside the mounting cylinder.

[0009] A material box is provided on the top side of the air duct near the installation cylinder, and the material box is in communication with the inside of the air duct;

[0010] The bottom of the air duct is evenly provided with a material distribution groove, and the bottom of the material distribution groove is provided with an inclined discharge plate, the lower end of the inclined discharge plate being open;

[0011] A vibrating frame is slidably installed at the bottom of the material box, and material-dispersing rods are evenly arranged on the inner side of the vibrating frame. The material-dispersing rods are used to disperse the falling tea leaves.

[0012] Furthermore, a mesh plate is installed at the end of the air duct that is away from the mounting cylinder.

[0013] Furthermore, a protrusion is provided on the top of the mounting cylinder, a sleeve is installed on the output shaft of the motor, three extension rods are evenly arranged on the surface of the sleeve, and a compression arc rod is provided at the end of the extension rod.

[0014] Furthermore, a pressing slide plate is vertically slidably installed inside the protrusion, the pressing slide plate passes through the protrusion, and a pressing slope is provided at the bottom of the pressing slide plate. The pressing arc rod in the rotating state is tangentially pressed with the pressing slope one by one.

[0015] The top of the extrusion slide plate is provided with a limiting head, and the cross-section of the limiting head is larger than that of the extrusion slide plate.

[0016] Furthermore, a vertical plate is provided on the top of the air duct near the installation cylinder, and a fixing rod is symmetrically provided on one side of the vibration frame. The fixing rod passes through the vertical plate, and a limit plate is provided at the end of the fixing rod.

[0017] Furthermore, a spring is sleeved on the surface of the fixing rod, the spring is placed between the limiting plate and the upright plate, and the spring applies an outward pushing force to the limiting plate.

[0018] Furthermore, a push rod is provided at the center of one end of the vibration frame, the push rod is placed parallel between the two fixed rods, the push rod passes through the vertical plate, and a connecting rod is hinged to the end of the push rod;

[0019] The end of the connecting rod opposite to the push rod is hinged to the top of the limiting head.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] In existing tea sorting processes, tea leaves tend to accumulate and clog at the feed inlet as they fall, preventing smooth entry into the sorting zone and affecting subsequent air-powered sorting. This solution addresses this by installing a vibrating frame at the bottom of the feed hopper. Driven by push rods, connecting rods, and a pressing plate, the vibrating frame vibrates periodically. During vibration, the dispersing rod continuously moves and disperses the tea leaves, ensuring even falling and preventing clogging, thus guaranteeing a continuous supply of tea.

[0022] In traditional wind-powered sorting methods, tea leaves often mix with materials of different weights, such as sand, gravel, and debris, resulting in insufficient sorting accuracy. This solution uses a motor-driven propeller to create a stable airflow inside the wind tunnel. Materials of different weights fall into multiple sorting troughs under the influence of the airflow. Heavier sand and gravel impurities enter the near-end sorting trough, while lighter tea leaves and debris are blown to the far-end sorting trough, achieving graded collection and significantly improving the sorting accuracy of tea leaves and impurities.

[0023] In existing equipment, the screening process often lacks effective vibration coordination, resulting in uneven force on the tea leaves during falling and air separation, causing them to easily accumulate and affecting the uniformity of air separation. This solution incorporates a vibration drive mechanism consisting of a sleeve, extension rod, extrusion arc rod, extrusion slide plate, connecting rod, and push rod. This mechanism synchronously drives the vibrating frame while the motor is running, ensuring that the tea leaves remain dispersed throughout the air separation process, guaranteeing the uniformity of air force application, and thus improving the overall screening effect.

[0024] In tea drying, existing technologies often require a separate drying process after screening, increasing energy consumption and processing time. This solution utilizes high-speed airflow inside a ventilation duct to simultaneously blow on the surface of the tea leaves while completing the sorting process. Combined with the dispersing effect of the vibrating frame, this effectively accelerates the evaporation of moisture from the tea leaves, achieving simultaneous screening and drying, reducing subsequent processes, and improving overall efficiency.

[0025] Regarding environmental protection, some existing equipment lacks effective isolation measures, allowing tea leaves and dust to easily spread into the working environment with the airflow. This solution installs a mesh plate at the end of the ventilation duct furthest from the installation duct. The mesh plate can prevent the leakage of debris and impurities carried in the airflow, avoiding secondary pollution, improving the operating environment, and ensuring the cleanliness of the production process. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of the projectile structure of this utility model;

[0029] Figure 4This is a schematic diagram of the left-side structure of this utility model;

[0030] Figure 5 This is a schematic diagram of the vibration frame installation and transmission structure of this utility model.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Frame; 11. Air duct; 12. Mounting cylinder; 121. Protrusion; 13. Material distribution chute; 14. Inclined discharge plate; 15. Vertical plate; 16. Material box; 2. Motor; 21. Air propeller; 3. Mounting cylinder; 31. Extension rod; 32. Extrusion arc rod;

[0033] 4. Extrusion slide plate; 41. Extrusion ramp; 42. Limiting head; 5. Connecting rod; 6. Vibrating frame; 61. Unloading rod; 62. Fixing rod; 621. Limiting plate; 63. Push rod; 7. Spring; 8. Mesh plate. Detailed Implementation

[0034] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0035] Example 1:

[0036] like Figures 1-5 As shown, a tea drying and screening device includes a frame 1, with an air duct 11 installed on the top of the frame 1. The air duct 11 is open at both ends to facilitate air circulation and material passage. An installation cylinder 12 is installed at one end of the air duct 11, and a motor 2 is installed on the outside of the installation cylinder 12. An air impeller 21 is installed on the output shaft of the motor 2 and is placed inside the installation cylinder 12. When the motor 2 is powered on, it drives the air impeller 21 to rotate at high speed, thereby forming a stable airflow inside the air duct 11 to utilize wind power for preliminary separation of tea leaves and impurities. A material box 16 is installed on the top of the air duct 11 near the installation cylinder 12, and the material box 16 is connected to the interior of the air duct 11. This facilitates the even introduction of dry tea leaves into the air duct 11, preventing material accumulation and blockage. Multiple material distribution troughs 13 are evenly distributed at the bottom of the air duct 11, with inclined discharge plates 14 at the bottom of each trough. The inclined discharge plates 14 have open lower ends, allowing materials of different weights and volumes to be guided out separately, improving sorting accuracy and processing efficiency. A vibrating frame 6 is slidably installed at the bottom of the material box 16, with material dispersing rods 61 evenly distributed inside the vibrating frame 6. The material dispersing rods 61 disperse the falling tea leaves during vibration, preventing blockage of the material inlet and keeping the material dispersed before entering the air duct 11, thus improving air separation uniformity and drying effect.

[0037] like Figure 2 and Figure 3As shown, a mesh plate 8 is installed at the end of the air duct 11 away from the mounting cylinder 12. The mesh plate 8 can filter the airflow and block some light impurities from overflowing with the airflow, thereby preventing dust and fine debris from entering the environment and avoiding secondary pollution of the working environment. At the same time, it ensures the directionality of the wind and improves the cleanliness of tea sorting.

[0038] like Figures 2-5 As shown, a protrusion 121 is provided on the top of the mounting cylinder 12. The protrusion 121 serves as a mounting support structure to accommodate internal moving parts. A sleeve 3 is mounted on the output shaft of the motor 2. Three extension rods 31 are evenly arranged on the surface of the sleeve 3. A pressing arc rod 32 is provided at the end of the extension rod 31. When the sleeve 3 rotates, the extension rod 31 drives the pressing arc rod 32 to rotate synchronously, so that the pressing arc rod 32 can periodically contact other parts, thereby triggering the operation of the vibration unloading mechanism inside the equipment.

[0039] like Figure 2 and Figure 5 As shown, a compression plate 4 is vertically slidably installed inside the protrusion 121. The compression plate 4 passes through the protrusion 121, and a compression ramp 41 is provided at the bottom of the compression plate 4. The compression arc rod 32 in the rotating state is tangentially compressed with the compression ramp 41 one by one, causing the compression plate 4 to reciprocate in the vertical direction, thereby indirectly driving the vibration frame 6 below. A limit head 42 is provided at the top of the compression plate 4. The cross section of the limit head 42 is larger than that of the compression plate 4, which can effectively prevent the compression plate 4 from falling too low and causing instability in motion, while ensuring the rationality of the motion amplitude and improving the stability of the overall vibration transmission.

[0040] like Figure 2 and Figure 3 As shown, a vertical plate 15 is provided on the top of the air duct 11 near the mounting cylinder 12. The vertical plate 15 is used as a support and fixing component to maintain the installation stability of each moving part. A fixing rod 62 is symmetrically arranged on one side of the vibration frame 6. The fixing rod 62 passes through the vertical plate 15 and plays the role of limiting and guiding. A limit plate 621 is provided at the end of the fixing rod 62. The limit plate 621 cooperates with the vertical plate 15 during vibration to ensure the stability of the running trajectory of the vibration frame 6 in the horizontal direction.

[0041] like Figure 2 and Figure 5 As shown, a spring 7 is sleeved on the surface of the fixed rod 62. The spring 7 is placed between the limiting plate 621 and the upright plate 15. The spring 7 applies an outward pushing force to the limiting plate 621, so that the vibrating frame 6 can be reset in time after being subjected to external force, thereby maintaining a continuous vibration effect, avoiding failure of the unloading rod 61, ensuring the smoothness and uniformity of the tea falling process, and solving the problem of tea accumulation and blockage that easily occurs in existing equipment.

[0042] like Figure 2 and Figure 5As shown, a push rod 63 is provided at the center of one end of the vibrating frame 6. The push rod 63 is placed parallel between two fixed rods 62 to ensure the balance during operation. The push rod 63 passes through the vertical plate 15, and a connecting rod 5 is hinged to the end of the push rod 63. The end of the connecting rod 5 away from the push rod 63 is hinged to the top of the limiting head 42. The connecting rod 5 forms a motion connection between the push rod 63 and the limiting head 42, which can effectively transmit the reciprocating motion of the extrusion slide plate 4 to the vibrating frame 6, thereby driving the vibrating frame 6 to vibrate periodically. This drives the material unloading rod 61 to continuously disperse the falling tea leaves, keeping the tea leaves in a dispersed state during the air separation process. This not only improves the sorting accuracy, but also uses the combination of vibration and wind to achieve synchronous drying of the tea leaves, avoiding damage to the tea leaves and improving processing efficiency.

[0043] Example 2:

[0044] See Figures 1-5 The operation process of a tea drying and screening device is as follows:

[0045] First, the frame 1 is fixed on a horizontal ground to support the various working parts and maintain structural stability. The material box 16 is installed on the top of the air duct 11 near the mounting cylinder 12. The workers pour the pre-dried tea leaves evenly into the material box 16. Under its own weight, the tea leaves gradually fall into the air duct 11. At this time, the vibrating frame 6 is located at the bottom of the material box 16. The vibrating frame 6 maintains stable horizontal sliding through the cooperation of the fixing rod 62 and the upright plate 15. Multiple material spreading rods 61 are evenly distributed on the inner side of the vibrating frame 6. When the vibrating frame 6 is under force, the material spreading rods 61 continuously move and disperse the falling tea leaves, so that the tea leaves are evenly dispersed before entering the air duct 11, avoiding the tea leaves from clumping and blocking the material inlet, and improving the smoothness of the material falling.

[0046] The motor 2 is fixedly installed on the outside of the mounting cylinder 12. After the motor 2 is started, it drives the output shaft to rotate, and the wind turbine 21 connected to the end of the output shaft rotates at high speed. The wind turbine 21 forms a strong airflow inside the mounting cylinder 12. This airflow flows rapidly along the inside of the wind duct 11 and pushes the falling tea leaves and mixed debris and gravel to deflect. The wind duct 11 is open at the front and back, allowing the airflow to pass freely and enhancing the effect of wind separation. Materials of different weights fall into multiple evenly distributed distribution troughs 13 at the bottom of the wind duct 11 under the action of wind. Heavier impurities such as stones and sand fall into the distribution trough 13 on the side closer to the material box 16, while lighter tea leaves are blown to a farther position by the airflow and eventually fall into the inner side of the distribution trough 13 at the far end. The inclined discharge plate 14 set at the bottom of the distribution trough 13 guides the different materials to the open end at the lower end for discharge, thereby achieving graded collection.

[0047] To prevent tea leaves from clogging and improve air separation accuracy, the equipment is equipped with a vibration drive mechanism consisting of a sleeve 3, extension rods 31, extrusion arc rods 32, extrusion slide plate 4, extrusion inclined surface 41, limiting head 42, push rod 63, and connecting rod 5. When the motor 2 is running, the output shaft of the motor 2 drives the sleeve 3 to rotate synchronously. The three extension rods 31, which are evenly distributed on the surface of the sleeve 3, rotate accordingly. The extrusion arc rods 32 at the ends of the extension rods 31 periodically contact the extrusion inclined surface 41 at the bottom of the extrusion slide plate 4 and generate an extrusion effect. As a result, the extrusion slide plate 4 reciprocates in the vertical direction. The limiting head 42 at the top of the extrusion slide plate 4 prevents it from falling excessively and ensures a reasonable stroke. The upward movement of the extrusion slide plate 4 is transmitted to the push rod 63 through the connecting rod 5, and then the push rod 63 drives the vibration frame 6 to vibrate periodically. The reciprocating movement of the vibration frame 6 causes the unloading rod 61 to continuously stir the tea leaves, effectively preventing the tea leaves from accumulating and clogging at the bottom of the material box 16. At the same time, it makes the tea leaves more dispersed during the falling process, improving the air separation accuracy.

[0048] In addition, the cooperation between the fixed rod 62 and the upright plate 15 provides vibration guidance. The limiting plate 621 at the end of the fixed rod 62 is always pushed outward under the action of the spring 7. The spring 7 can buffer and reset the vibration frame 6, so that the vibration process maintains continuity and stability. A mesh plate 8 is installed at the end of the air duct 11 away from the mounting cylinder 12. The mesh plate 8 can block the leakage of fine debris carried in the airflow, prevent impurities from spreading to the working environment, and at the same time ensure the airflow direction is concentrated, which is beneficial to the accuracy of tea screening.

[0049] In summary, this embodiment achieves uniform feeding and anti-clogging treatment of tea leaves through the cooperation of the material box 16, the air duct 11, the vibrating frame 6, and the material unloading rod 61; the airflow generated by the motor 2, the paddle 21, and the air duct 11 achieves the separation and screening of tea leaves and impurities; the vibration mechanism composed of the sleeve 3, the extension rod 31, the extrusion arc rod 32, the extrusion slide plate 4, the connecting rod 5, and the push rod 63 achieves vibration-assisted unloading and sorting; the material distribution trough 13 and the inclined discharge plate 14 complete the graded discharge of materials; the mesh plate 8 achieves impurity isolation and airflow control; and the cooperation of the spring 7 and the limiting plate 621 achieves the reset and stable operation of the vibrating frame 6, thereby solving the problems of easy clogging, insufficient sorting accuracy, and lack of drying assistance in the screening process of tea leaves in the prior art, and improving the overall operating efficiency and tea quality.

[0050] The working principle of this utility model is as follows: the dry tea leaves to be sorted are poured into the material box 16. The tea leaves fall into the air duct 11 through the material box 16. The motor 2 is started to drive the paddle 21 to rotate, and then blow air into the air duct 11. The air blows the falling tea leaves and tea residues off course. At this time, materials of different weights will fall into the inner side of multiple material distribution troughs 13 below. For example, heavier stones and sand will fall into the inner side of the nearest material distribution trough 13, while lighter tea fragments will be blown further away and fall into the inner side of the farthest material distribution trough 13. Then, they are discharged through the inclined discharge plate 14 and the gas through the mesh plate 8, which prevents impurities from being blown out and polluting the working environment.

[0051] Because the spring 7 pushes the limiting plate 621 outward, the vibrating frame 6 is placed on the far left. Through the cooperation of the push rod 63 and the connecting rod 5, the extrusion slide plate 4 is driven to move downward, so that the extrusion slope 41 exceeds the inner wall of the mounting cylinder 12 and is limited by the top limiting head 42 to prevent the extrusion slide plate 4 from falling too low. When the motor 2 starts, it can drive the sleeve 3 to rotate. Through multiple extrusion arc rods 32, the extrusion slope 41 can be extruded, so that the extrusion slide plate 4 moves upward. Then, through the connecting rod 5, the vibrating frame 6 is driven to vibrate back and forth. The reciprocating vibration of the unloading rod 61 unblocks the tea leaves and prevents them from clogging when falling. At the same time, the vibration of the vibrating frame 6 can scatter the tea leaves, improve the accuracy of air separation, and dry the tea leaves to a certain extent during air separation and prevent the tea leaves from being damaged.

[0052] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A tea drying and sorting device, comprising a frame (1), characterized in that: The top of the frame (1) is provided with a wind duct (11), the wind duct (11) is open at the front and back, one end of the wind duct (11) is provided with an installation cylinder (12), a motor (2) is installed on the outside of the installation cylinder (12), and a wind propeller (21) is installed on the output shaft of the motor (2), and the wind propeller (21) is placed inside the installation cylinder (12); A material box (16) is provided on the top side of the air duct (11) near the mounting cylinder (12), and the material box (16) is in communication with the interior of the air duct (11); The bottom of the air duct (11) is evenly provided with a material distribution groove (13), and the bottom of the material distribution groove (13) is provided with an inclined discharge plate (14), and the lower end of the inclined discharge plate (14) is open. A vibrating frame (6) is slidably installed at the bottom of the material box (16), and a material dispersing rod (61) is evenly arranged on the inner side of the vibrating frame (6). The material dispersing rod (61) is used to disperse the falling tea leaves.

2. The tea drying and screening equipment according to claim 1, characterized in that: A mesh plate (8) is installed at the end of the air duct (11) away from the mounting cylinder (12).

3. The tea drying and screening equipment according to claim 1, characterized in that: The top of the mounting cylinder (12) is provided with a protrusion (121), and a sleeve (3) is installed on the output shaft of the motor (2). Three extension rods (31) are evenly arranged on the surface of the sleeve (3), and a compression arc rod (32) is provided at the end of the extension rod (31).

4. The tea drying and screening equipment according to claim 3, characterized in that: The protrusion (121) is vertically slidably installed with a pressing slide plate (4), which passes through the protrusion (121). The bottom of the pressing slide plate (4) is provided with a pressing slope (41), and the pressing arc rod (32) in the rotating state is tangentially pressed with the pressing slope (41) one by one. The top of the extrusion slide plate (4) is provided with a limiting head (42), and the cross section of the limiting head (42) is larger than that of the extrusion slide plate (4).

5. The tea drying and screening equipment according to claim 4, characterized in that: A vertical plate (15) is provided on the top of the air duct (11) near the mounting cylinder (12), and a fixing rod (62) is symmetrically provided on one side of the vibration frame (6). The fixing rod (62) passes through the vertical plate (15), and a limit plate (621) is provided at the end of the fixing rod (62).

6. The tea drying and screening equipment according to claim 5, characterized in that: A spring (7) is sleeved on the surface of the fixing rod (62). The spring (7) is placed between the limiting plate (621) and the upright plate (15). The spring (7) applies an outward pushing force to the limiting plate (621).

7. The tea drying and screening equipment according to claim 6, characterized in that: The vibration frame (6) has a push rod (63) at one end center. The push rod (63) is placed parallel between the two fixed rods (62). The push rod (63) passes through the vertical plate (15). The end of the push rod (63) is hinged to a connecting rod (5). The end of the connecting rod (5) away from the push rod (63) is hinged to the top of the limiting head (42).

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