Tea blending, grading and impurity removal machine
By designing a tea blending and grading machine with integrated spiral lift conveyor, weighing conveyor, mixing and uniform stacking machine and air-selecting and grading machine, the problems of large area of existing equipment and complicated operation are solved, and efficient and low-cost tea processing is achieved.
Patent Information
- Application Number
- CN202411948654.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-04-04
AI Technical Summary
The existing tea mixing, even stacking, grading and decomposition equipment occupies a large area of the workshop and complicated operation steps, resulting in high production costs.
A tea leaf mixing, graded and decomposition machine is designed, combining spiral lifting conveyor, weighing conveyor, mixing uniform stacking machine and air-selecting and grading and decomposition machine to realize the continuous mixing, uniform stacking, grading and decomposition of tea leaves.
This equipment combination reduces the number of equipment and the workshop area, simplifies operational steps, reduces production costs, and has low energy consumption, which can save energy by 10-15%, improves labor efficiency by 15-20%, and reduces production costs by about 30%.
Smart Images
Figure CN119746692A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tea processing, in particular to a tea blending, grading and impurity removing machine. Background Art
[0002] In the process of tea refining, blending, stacking, grading, and impurity removal are indispensable processes. At present, the blending and stacking process is mostly carried out by a box-type blending and stacking machine. For example, Chinese patent application No. 2016208735890 discloses a tea stacking and blending machine, which is equipped with a discharging conveyor, a reduction motor traction device, a box, a cloth crane, a feeding crane, a crane guide rail, a stacking conveyor, a maintenance staircase, an inspection platform, a stacking baffle, a stacking conveyor belt, a tea rake, and a discharging bin door. The equipment occupies a large area, the operation is complicated, and the cost of stacking and blending is high. In addition, the grading process of tea is generally carried out by a ladder grader or a wind selection grader; the impurity removal process of tea is carried out by a shaking screening machine, a flat round screening machine, or a wind selection impurity removal machine. To this end, in the process of blending, stacking, grading and removing impurities from tea, a lot of mechanical equipment is needed, the operating steps are complicated, a large workshop area is occupied, and the cost of tea making is high. Summary of the invention
[0003] The purpose of the invention is to provide a tea blending, grading and impurity removing machine to solve the problems that the existing blending, stacking, grading and impurity removing equipment occupies a large workshop area, most of the equipment is operated independently and the production cost is high.
[0004] The technical solution adopted by the present invention to solve its technical problems is: a tea blending, grading and impurity removing machine, comprising a spiral lifting conveyor and a weighing conveying trough, the discharge end of the spiral lifting conveyor is connected to a blending and stacking machine, and the discharge end of the blending and stacking machine is connected to a wind selection, grading and impurity removing machine.
[0005] In order to facilitate the weighing and feeding of multiple blended teas at the same time, a plurality of weighing conveyor troughs are arranged vertically at intervals on the path of the spiral lifting conveyor. The weighing conveyor trough includes a trough body, a weighing conveyor belt arranged in the trough body, and a weighing device arranged below the weighing conveyor belt. A tea storage hopper is arranged at the feeding end of the trough body. While the tea storage hopper is discharging the tea, the weighing conveyor belt slowly drives the tea leaves forward, so that the tea leaves are laid on the weighing conveyor belt with a uniform thickness.
[0006] In order to realize multi-functionality of one machine and reduce the area occupied by equipment and workshop, a spiral lifting conveyor is used, and a group of five-finger turning and mixing robots are distributed on the spiral lifting conveyor to simulate human hand turning and mixing of tea leaves. During the conveying process, the tea leaves are initially blended by forward turning and reverse turning and mixed, and transported forward. The initially blended tea leaves are vertically sent into the blending and stacking machine.
[0007] In order to solve the problem that the existing blending and stacking machines occupy a large space and realize efficient blending and stacking of tea leaves, the blending and stacking machine includes a rotating blending and stacking cylinder, the top of which is provided with a feed inlet, and the bottom of which is provided with a discharge outlet, a rotating distributor is provided in the blending and stacking cylinder below the feed inlet, and a mixing and blending mechanism is provided below the rotating distributor for catching the tea leaves on the rotating distributor and mixing them again, and the rotating blending and stacking cylinder and the rotating distributor rotate in opposite directions.
[0008] Furthermore, the rotary distributor on the blending and stacking machine is an umbrella-shaped structure, and a group of first guide ribs are arranged on the rotary distributor in the opposite direction of rotation of the rotary distributor. The mixing and blending mechanism includes a conical cylinder at the lower part of the rotating blending and stacking cylinder, and a group of second guide ribs are arranged on the inner wall of the conical cylinder in the opposite direction of rotation of the rotating blending and stacking cylinder.
[0009] In order to efficiently grade and remove impurities from tea leaves, the front part of the horizontal box of the air classification and impurity removal machine is designed to be rectangular, and the rear part is designed to be a cone structure. The cone is used to tighten the air in the air classification box, forcing the heavier tea leaves to fall into the sorting chamber for grading at the junction of the box and the cone, while the light tea fragments, tea worm eggs, dust and debris float out from the outlet of the cone to be removed.
[0010] In addition, in order to further achieve mixing and centralized dropping of materials, a left air inlet pipe and a right air inlet pipe are connected to the two side walls of the air separation, grading and impurity removal box below the feed port, and a crescent-shaped wind direction guide device is provided at the front end of the main air duct, and a group of guide holes are evenly distributed on the crescent-shaped wind direction guide device to converge the wind force to the middle.
[0011] The beneficial effects of the present invention are as follows: the present invention adopts a spiral lifting conveyor and a weighing conveying trough to complete the feeding and conveying, and then enters the blending and stacking machine for blending and stacking, and then passes through the wind separation, grading and impurity removal machine for sorting and impurity removal. The above equipment is combined into a continuous tea blending, grading and impurity removal machine, which not only solves the problems of the existing tea blending, stacking, grading and impurity removal process, which requires a variety of tea machine equipment, complicated operating steps and high production costs, but also the equipment occupies a small workshop area as a whole, and has low energy consumption, which can save energy by 10-15%, improve work efficiency by 15-20%, and reduce production costs by about 30%.
[0012] The spiral lifting conveyor cooperates with the weighing conveying trough to complete vertical conveying. At the same time, the feeding of different tea leaves is completed and the preliminary mixing is completed by the manipulator. It occupies a small area and has high conveying and mixing efficiency. The blending and stacking machine adopts a cylindrical structure, occupies a small area, and uses the rotation of the blending and stacking cylinder and the rotation of the rotary distributor to throw out the tea leaves for mixing. At the same time, the first guide rib and the second guide rib are combined to guide the tea leaves to be thrown out and mixed along the set direction. The two side structures of the first guide rib and the second guide rib are conducive to the tea leaves to be mixed laterally while sliding downward. Therefore, the use of this blending and stacking machine can improve the uniformity of the mixing. The front part of the air selection and classification impurity removal machine is designed as a horizontal long box body, and the rear part is a cone cylinder structure. The cone cylinder is used to tighten the air blowing in the air selection box, forcing the heavy strip tea leaves to fall into the sorting chamber at the junction of the box and the cone cylinder for classification. Tea fragments, tea insect eggs, dust and debris can also be removed from the outlet of the cone cylinder, realizing the integration and automation of classification and impurity removal. At the same time, the air selection, grading and impurity removal machine uses multi-directional air inlet below the feed port to further mix the tea leaves.
[0013] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is the front view of the present invention.
[0015] Figure 2 for Figure 1 A magnified schematic diagram of part A in the figure.
[0016] Figure 3 for Figure 2 Enlarged schematic diagram of part B in the middle.
[0017] Figure 4 It is a schematic diagram of the structure of the weighing conveying trough in the present invention.
[0018] Figure 5 It is the front view of the assembling and leveling machine in the present invention.
[0019] Figure 6 This is a stereoscopic diagram of the assembly of the rotary distributor and the mixing and assembling structure of the present invention (the arrow in the figure indicates the direction of rotation).
[0020] Figure 7 This is a top view of the assembly of the rotary distributor and the mixing and assembling structure of the present invention (the arrow in the figure indicates the direction of rotation).
[0021] Figure 8 It is a three-dimensional diagram of the mixing and splicing structure of the present invention (the arrow in the figure indicates the rotation direction).
[0022] Fig. 9 It is a front view of the air separation, classification and impurity removal machine in the present invention.
[0023] Fig.10 It is a top sectional view of the crescent-shaped wind direction guiding device of the present invention.
[0024] Fig.11 It is a left view of the air separation, classification and impurity removal machine in the present invention. DETAILED DESCRIPTION
[0025] Examples, such as Figures 1 to 11 As shown, a tea blending, grading and impurity removing machine comprises a spiral lifting conveyor 1, on the path of which a group of weighing conveying troughs 2 are arranged at intervals, a blending and stacking machine 3 is connected to the discharge end of the spiral lifting conveyor 1, and a wind separation, grading and impurity removing machine 4 is connected to the discharge end of the blending and stacking machine 3. The present invention occupies a small space and can realize continuous operation of blending, grading and impurity removal, thereby improving the automation of production and reducing production costs.
[0026] The spiral elevator conveyor 1 is an APOLLO type chain plate spiral elevator, including a frame 11, a spiral conveyor trough 12 fixed on the frame 11, and a spiral conveyor belt 13 arranged in the spiral conveyor trough 12. The specific structure of the machine is the prior art and will not be described in detail here. The spiral elevator conveyor 1 transports tea leaves from bottom to top, and a group of weighing conveyor troughs 2 are also arranged on the side of the spiral conveyor elevator 1. The weighing conveyor troughs 2 are at different heights, and tea leaves are added to different positions of the spiral conveyor belt 13 respectively. The number of the weighing conveyor troughs 2 can be set according to actual needs. The present invention preferably adopts a 5-layer design, and a total of 5 weighing conveyor troughs 2 are arranged. Tea leaves of different specifications and models are added through each weighing conveyor trough 2, and finally the addition of tea leaves of various specifications and models is completed on the spiral conveyor elevator 1, preparing for the next step of blending.
[0027] The weighing conveyor trough 2 includes a trough body 21, a weighing conveyor belt 22 arranged in the trough body 21, and a weighing device 23 arranged below the trough body 21. A tea storage hopper 24 is arranged at the feeding end of the trough body 21. The premixed tea leaves are stored in the tea storage hopper 24, and the tea leaves are discharged according to the weight of the tea leaves to be blended each time. While the tea storage hopper 24 is discharging the tea leaves, the weighing conveyor belt 22 slowly drives the tea leaves to move forward, so that the tea leaves to be blended each time are evenly spread on the weighing conveyor belt 22. In order to ensure that the weighing conveyor belt 22 evenly spreads the tea leaves in the width direction, the discharge port of the tea storage hopper 24 is a flat port adapted to the width of the weighing conveyor belt 22. When the weighing device 23 obtains that the tea leaves on the weighing conveyor belt 22 reach the set weight, the valve at the discharge port of the tea storage hopper 24 is closed, and the discharge is stopped. At the same time, the weighing conveyor belt 22 stops rotating. When it is necessary to discharge the tea leaves to the spiral lifting conveyor 1 , the weighing conveyor belt 22 is opened to allow the tea leaves to be discharged from the discharge end of the weighing conveyor belt 22 .
[0028] In order to ensure that the tea leaves output from the weighing conveyor belt 22 can be evenly spread on the spiral conveyor belt 13, a tea outlet direction adjustment groove 25 is provided at the discharge end of the trough body 21. The tea outlet of the tea outlet direction adjustment groove 25 is located above the spiral conveyor belt 13, and the direction of the tea outlet is consistent with the direction of the spiral conveyor belt 13 below. At the same time, the width of the weighing conveyor belt 22 and the tea outlet direction adjustment groove 25 is adapted to the width of the weighing conveyor trough 2, so that the tea leaves can be evenly spread in the width direction of the spiral conveyor belt 13.
[0029] When feeding, the spiral conveyor 1 is opened to make the spiral conveyor belt 13 run upward, and then the first layer of weighing conveyor trough 2 is started to spread the spiral conveyor belt 13. When the tea leaves on the first layer of weighing conveyor trough 2 are transported to the landing point on the spiral conveyor belt 13 corresponding to the discharge of the second layer of weighing conveyor trough 2, the second layer of weighing conveyor trough 2 discharges the spiral conveyor belt 13, so that the tea leaves on the second layer of weighing conveyor trough 2 are evenly superimposed on the tea leaves output by the first layer of weighing conveyor trough 2. The spiral conveyor belt 13 continues to transport the tea leaves upward. When it reaches the landing point on the spiral conveyor belt 13 corresponding to the discharge of the third layer of weighing conveyor trough 2, the third layer of weighing conveyor trough 2 discharges the spiral conveyor belt 13, so that the tea leaves on the third layer of weighing conveyor trough 2 are evenly superimposed on the previous tea leaves, and so on, until all the tea leaves are added. The running time and speed of each device are precisely controlled by the controller to achieve the purpose of mutual coordination. In order to realize premixing of tea leaves on the spiral lifting conveyor 1, the spiral lifting conveyor 1 is provided with a turning and mixing robot 5 in front of the tea outlet of each weighing conveying trough 2 to turn and mix the tea leaves. The turning and mixing robot 5 includes a positive turning robot 51 and a negative turning robot 52 which are arranged relatively. The positive turning robot 51 rotates forward, and the negative turning robot 52 rotates reversely. The positive turning robot 51 and the negative turning robot 52 adopt a separate five-finger structure to imitate the left and right hands of a person to turn the tea leaves. In order to reduce the breakage of the turned and blended tea leaves, the positive turning robot 51 and the negative turning robot 52 are also wrapped with a food-grade latex jacket to facilitate soft turning and blending.
[0030] The blending and stacking machine 3 includes a rotating blending and stacking cylinder 31, which is made of stainless steel and is a vertical conical cylinder structure. The cylinder is 1.5-1.8m high and 50-55cm in diameter. A feed port 311 is provided at the top of the cylinder, and the diameter of the feed port 311 is 30-35cm. A discharge port 312 is provided at the bottom. Two-thirds of the upper part of the cylinder is a cylindrical structure, and one-third of the lower part is a conical structure. The diameter of the discharge port 312 is 35-40cm, so as to collect the tea leaves for uniform stacking and centralized output. A driven gear 313 is fixedly provided on the outer wall of the rotating blending and stacking cylinder 31, and a stacking cylinder driving motor 34 is provided on the frame 11. A driving gear 341 cooperating with the driven gear 313 is provided on the output shaft of the stacking cylinder driving motor 34. The working of the stacking cylinder driving motor 34 drives the driving gear 341 to rotate, and the rotating blending and stacking cylinder 31 rotates under the cooperation of the driven gear 313.
[0031] A rotary distributor 32 is provided below the feed inlet 311 in the blending and stacking cylinder 31. The rotary distributor 32 is an umbrella-shaped structure. A distributor driving motor 35 is fixedly provided above the rotary distributor 32 on the frame 1. A connecting shaft 351 is provided between the distributor driving motor 35 and the rotary distributor 32. The distributor driving motor 35 drives the connecting shaft 351 to rotate, thereby driving the rotary distributor 32 to rotate. After the tea leaves fall from the feed inlet 311 onto the rotary distributor 32, they are thrown out under the centrifugal force of the rotary distributor 32. The rotary distributor 32 is provided with a group of first guide ribs 321 in the opposite direction of rotation of the rotary distributor 32. The first guide ribs 321 extend obliquely downward from the top of the rotary distributor 32 to the lower edge. The direction in which the first guide ribs 321 are inclined from the top to the bottom is opposite to the rotation direction of the rotary distributor 32, and the two side walls of the first guide ribs 321 are arc structures. When the tea leaves fall onto the rotary distributor 32, they move toward the first guide ribs 321 and downward at the same time under the action of the rotating centrifugal force, and the mixed material is flipped over under the action of the arc surface of the first guide ribs 321.
[0032] The rotating blending and stacking cylinder 31 is provided with a mixing and blending mechanism 33 for receiving the tea leaves on the rotating distributor 32 and mixing them again below the rotating distributor 312. The rotating blending and stacking cylinder 31 and the rotating distributor 32 rotate in opposite directions. The mixing and blending mechanism 33 includes a conical cylinder 331 at the lower part of the rotating blending and stacking cylinder 31. A group of second guide ribs 332 with a rotation direction opposite to that of the rotating blending and stacking cylinder 31 are provided on the inner wall of the conical cylinder 331. The two side walls of the second guide ribs 332 are both cambered structures. Their functions and working principles are the same as those of the rotating distributor 32. The tea leaves are mixed twice and then output through the discharge port 312. The blending and stacking machine 3 not only occupies a small space, but also mixes the tea leaves multiple times through the forward and reverse rotation of the rotating blending and stacking cylinder and the rotating distributor, combined with the first guide ribs and the second guide ribs, thereby improving the uniformity of the mixing and stacking.
[0033] The wind selection, grading and impurity removal machine 4 includes a wind selection, grading and impurity removal box 41 and a blower 410. The wind selection, grading and impurity removal box 41 is 1.8m long, 65cm wide and 1.2m high. A feed port 43 is provided at the top of the front end of the wind selection, grading and impurity removal box 41. The feed port 43 is located below the discharge port 312 and is a trumpet structure so as to receive the tea leaves from the discharge port 312 for grading and impurity removal. The front three quarters of the wind selection, grading and impurity removal box 41 are designed as a rectangular parallelepiped structure for wind selection and grading; the rear quarter is designed as a cone cylinder structure to form a cone cylinder air outlet 44, so as to use the cone cylinder to tighten the blowing in the wind selection box, forcing the heavier tea leaves to fall into the sorting chamber at the junction of the rectangular box and the cone cylinder for grading, and at the same time, tea fragments, tea worm eggs, dust and debris are removed from the cone cylinder air outlet 44. The air classification and impurity removal box 41 is provided with two first baffle plates 45 and a second baffle plate 46, which divide the air classification and impurity removal box 41 into three sorting chambers, which are the first sorting chamber 411, the second sorting chamber 412 and the third sorting chamber 413 from front to back, and each sorting chamber is provided with a tea outlet, and the tea outlet of the first sorting chamber 411 is defined as the special tea outlet, the tea outlet of the second sorting chamber 412 is defined as the first tea outlet, and the tea outlet of the third sorting chamber 413 is defined as the second tea outlet. In order to collect the tea fragments, tea worm eggs, dust and debris that float out in time, a long strip of debris collection bag with a 50-60 mesh stainless steel screen is also provided at the outlet of the cone, which can collect the floating debris into the debris bag without blocking the outlet, so as to avoid the occurrence of secondary pressure affecting the air classification.
[0034] The hair dryer 410 is a variable frequency hair dryer, and can set different blowing volumes according to different types of tea to perform intelligent air selection, grading and impurity removal. The hair dryer 410 is provided with a main air duct 42, a left air inlet duct 47 and a right air inlet pipe 48. The air outlet of the main air duct 42 is located at the front end of the air selection, grading and impurity removal box 41, and the air outlets of the left air inlet duct 47 and the right air inlet pipe 48 are located on the two side walls below the feed inlet 43 of the air selection, grading and impurity removal box 41. The air outlets of the left air inlet duct 47 and the right air inlet pipe 48 are arranged opposite to each other and are located below the air outlet of the main air duct 42, and the fallen tea leaves are stirred again through the left air inlet duct 47 and the right air inlet pipe 48. A crescent-shaped wind direction guide device 49 is provided at the front end of the main air duct 42, and the outlet of the main air duct 42 is located in the middle of the crescent-shaped wind direction guide device 49 in the left and right direction and at a downwardly lower position. A rotating fan blade 91 is provided in the crescent-shaped wind direction guide device 49 and directly in front of the outlet of the main air duct 42 to evenly spread the wind blown out of the main air duct 42 and blow it forward along the shape of the crescent-shaped wind direction guide device 49. The wind force is concentrated under the action of the guide hole 491 to gather the tea leaves falling from the feed port, so that they float upward in a semi-arc shape, and fall into the three air selection chambers for classification through the heavy-light free fall method. In order to better grade the tea leaves drifting in the semi-arc shape, the first baffle plate 45 near the feed port 43 is arranged vertically to block the heavy tea leaves in the shape of strips from falling directly into the first sorting chamber 411; the second baffle plate 46 is arranged obliquely, and its upper end is inclined 3-4° toward the cone air outlet 44 to expand the spacing of the second sorting chamber 412, blocking the slightly heavier tea leaves in the shape of strips from falling into the second sorting chamber 412, and allowing the lighter tea leaves in the shape of strips to float over the baffle plate at the junction of the box body and the cone, and fall into the third sorting chamber 413, while causing tea fragments, tea worm eggs, dust and other debris to float upward first, and then fall when they hit the wall of the cone air outlet 44, and float out of the cone air outlet 44 for removal.
[0035] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.
Claims
1. A tea blending, grading and impurity removal machine, characterized by: The invention comprises a spiral lifting conveyor (1), a group of weighing conveying troughs (2) are arranged at intervals on the path of the spiral lifting conveyor (1), different tea leaves can be conveyed to the spiral lifting conveyor (1) through different weighing conveying troughs (2), a blending and stacking machine (3) is connected to the discharge end of the spiral lifting conveyor (1), and a wind selection, grading and impurity removal machine (4) is connected to the discharge end of the blending and stacking machine (3); The blending and stacking machine (3) comprises a rotating blending and stacking cylinder (31), the top of which is provided with a feed inlet (311), and the bottom of which is provided with a discharge outlet (312), a rotating distributor (32) is provided in the blending and stacking cylinder (31) below the feed inlet (311), and a mixing and blending mechanism (33) is provided below the rotating distributor (312) in the rotating blending and stacking cylinder (31) for receiving tea leaves on the rotating distributor (32) and blending them again, and the rotating blending and stacking cylinder (31) and the rotating distributor (32) rotate in opposite directions.
2. The tea blending, grading and impurity removing machine according to claim 1, characterized in that: The weighing conveying trough (2) comprises a trough body (21), a weighing conveying belt (22) arranged in the trough body (21), and a weighing device (23) arranged below the trough body (21). A tea storage hopper (24) is arranged at the feeding end of the trough body (21). When the tea storage hopper (24) discharges the tea, the weighing conveying belt (22) slowly drives the tea leaves to move forward.
3. The tea blending, grading and impurity removing machine according to claim 2, characterized in that: The discharging end of the trough body (21) is provided with a tea discharging direction adjustment groove (25); the discharging port of the tea storage hopper (24) is a flat port adapted to the width of the weighing conveyor belt (22); the widths of the weighing conveyor belt (22) and the tea discharging direction adjustment groove (25) are adapted to the width of the weighing conveyor trough (2).
4. The tea blending, grading and impurity removing machine according to claim 1, characterized in that: The rotary distributor (32) on the blending and stacking machine (3) is an umbrella-shaped structure, and a group of first guide ribs (321) with a rotation direction opposite to that of the rotary distributor (32) are arranged on the rotary distributor (32). The mixing and blending mechanism (33) comprises a conical cylinder (331) at the lower part of the rotating blending and stacking cylinder (31), and a group of second guide ribs (332) with a rotation direction opposite to that of the rotating blending and stacking cylinder (31) are arranged on the inner wall of the conical cylinder (331).
5. The tea blending, grading and impurity removing machine according to claim 4, characterized in that: Both side walls of the first guide rib (321) and the second guide rib (332) are arc surface structures.
6. The tea blending, grading and impurity removing machine according to claim 1, characterized in that: The spiral lifting conveyor (1) is provided with a stirring robot (5) in front of the tea outlet of each weighing conveying trough (2).
7. The tea blending, grading and impurity removing machine according to claim 1, characterized in that: The air classification and impurity removal machine (4) comprises an air classification and impurity removal box (41), one end of the air classification and impurity removal box (41) is provided with a main air duct (42), an upper portion of one end of the main air duct (42) is provided with a feed port (43), and the other end is provided with a cone air outlet (44), a first baffle plate (45) and a second baffle plate (46) are provided in the air classification and impurity removal box (41), and the first baffle plate (45) and the second baffle plate (46) divide the air classification and impurity removal box (41) into a first sorting chamber (411), a second sorting chamber (412) and a third sorting chamber (413).
8. The tea blending, grading and impurity removing machine according to claim 7, characterized in that: A left air inlet pipe (47) and a right air inlet pipe (48) are connected to the two side walls of the air selection, classification and impurity removal box (41) below the feed port (43), and a crescent-shaped wind direction guide device (49) is provided at the front end of the main air duct (42), and a rotating fan blade (491) is provided inside the crescent-shaped wind direction guide device (49).
9. The tea blending, grading and impurity removing machine according to claim 7, characterized in that: The first baffle plate (45) is arranged close to the feed port (43), the first baffle plate (45) is arranged vertically, and the second baffle plate (46) is arranged obliquely, with its upper end inclined at 3-4 degrees toward the cone air outlet (44).