Production line for continuously removing flower insects of jasmine tea
By designing a production line for the continuous removal of insects from jasmine tea, and utilizing components such as multi-layer screens, suction-type air separation, and spectral sorting machines, the problems of continuous removal of insects and high tea loss during the refining process of jasmine tea have been solved, achieving efficient and continuous processing of tea.
Patent Information
- Application Number
- CN202511498207.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2025-11-21
AI Technical Summary
In the current jasmine tea refining process, it is difficult to continuously remove flower insects, and the tea leaves are subject to high losses.
Design a continuous production line for removing insects from jasmine tea flowers, including components such as a tea feeding device, a rotary screen, an air separator, a color sorter, and a spectral separator. The continuous processing of tea is achieved through multi-layer screens, suction-type air separation, and spectral separation.
This enables continuous processing of jasmine tea, reduces tea leaf loss, and improves impurity removal.
Smart Images
Figure CN120984564A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of tea refining technology, specifically relating to a production line for the continuous removal of insects from jasmine tea flowers. Background Technology
[0002] Jasmine tea has a long history of production and consumption in my country, and is widely popular due to its unique aroma and health properties such as antioxidants, nerve calming, and mood soothing. In recent years, research on jasmine tea has mainly focused on the biochemical basis of its characteristic flavor, potential health functions, and technological improvements in the scenting process. Refining the tea leaves is a crucial step in the processing, primarily aimed at shaping the appearance, removing impurities, improving purity, proper drying, and harmonizing the internal qualities. However, the refining process of jasmine tea, a vital step in the transformation from raw tea to finished product, has rarely been studied in depth.
[0003] Unlike traditional tea, jasmine tea is a reprocessed tea, with the scenting process being a key technique. The raw materials for scenting jasmine tea are dried tea leaves and fresh jasmine flowers. Jasmine is a highly aromatic flower, its fragrance components gradually released as the flower opens; therefore, the jasmine flowers used for scenting must be unopened. Jasmine insects burrow into the unopened buds. During the scenting process, as the flowers gradually open, some of the insects transfer to the tea. As the tea dries, these insects appear in the raw tea as small, yellow, millet-like particles about 1-5mm long. Because of their small size and light weight, they are difficult to separate from the curled tea leaves. Therefore, removing these insect impurities is a crucial and challenging aspect of the refining process for jasmine tea.
[0004] The current main processing and impurity removal steps for jasmine tea include sieving, winnowing, color sorting, and picking. These processes are mostly based on single-machine operation or a combination of single-machine operations and sequential steps. The machinery used is traditional, requiring manual assistance between steps, making continuous operation difficult and resulting in poor processing and impurity removal. Traditional jasmine tea refining processes typically use round sieves to remove lower sections of tea with high insect content to achieve insect removal. However, insects are still difficult to remove from other grades of tea, and there are problems with high rates of insects carried over to the main tea and high refining losses. Summary of the Invention
[0005] In view of the above-mentioned prior art, the present invention provides a production line for continuous removal of insects from jasmine tea flowers, so as to solve the technical problems of the difficulty in continuous tea refining and the high tea loss during the refining process.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is to provide a production line for continuous removal of insects from jasmine tea flowers, including a tea feeding device and a first rotary screen connected by a first conveying device; the first rotary screen is provided with two layers of screens, and the internal space of the first rotary screen is divided into three regions: upper, middle and lower, by the two layers of screens. The upper region is connected to the first conveying device, and each of the upper, middle and lower regions is provided with a material outlet; the outlet of the middle region of the first rotary screen is connected to a first air separator through a second conveying device, and the outlet of the first air separator is provided with a conveyor belt, the end of which is provided with a first color sorter; the outlet of the lower region of the first rotary screen is connected to a rotary screen-air separator combined impurity removal device through a third conveying device, and the outlet of the rotary screen-air separator combined impurity removal device is connected to a first spectral separator through a fourth conveying device.
[0007] Based on the above technical solution, the present invention can be further improved as follows.
[0008] Furthermore, the tea feeding device is a screw feeder.
[0009] Furthermore, an automatic feeding vibratory feeder is installed at the end of the screw feeder.
[0010] Furthermore, the first, third, and fourth conveying devices are vertical conveyors; the vertical conveyor includes an upper frame and a lower frame, with an upper housing and a lower housing respectively installed at the upper and lower ends of the upper and lower frames. A rotating shaft with a gear disc is installed in the upper or lower housing, and a motor is installed in the lower or upper housing. A gear disc is installed on the rotating shaft of the motor, and the two gear discs are connected by a transmission chain. Several concave material plates are installed on the transmission chain. A feed inlet is provided on the side of the lower housing near the upper frame, and a discharge outlet is provided on the side of the upper housing near the lower frame.
[0011] Furthermore, the mesh diameter of the upper screen in the first rotary screen is larger than that of the lower screen.
[0012] Furthermore, the two layers of screens inside the first rotary screen are set at an angle of 3 to 10°.
[0013] Furthermore, the second conveying device is an automatic feeding vibratory feeder.
[0014] Furthermore, the first air separator is a suction-type air separator; the suction-type air separator includes a housing, with an air inlet on one side and an air outlet on the other side directly opposite the air inlet. A grille is installed at the air outlet, and a dust collection box is installed outside the air outlet. An induced draft fan is installed between the air inlet and the air outlet, and an arc-shaped baffle is installed above the induced draft fan. The arc-shaped baffle divides the internal space of the housing into two parts, and each part has a dust removal port at its bottom. A channel for tea leaves to pass through is provided between the outlet of the automatic feeding vibratory plate and the air inlet of the suction-type air separator; a conveyor belt is installed below the channel.
[0015] Furthermore, the discharge port of the first color sorter is connected to the second air classifier via the fifth conveying device. The discharge port of the second air classifier is equipped with a conveyor belt, and the second color sorter is located at the end of the conveyor belt. The fifth conveying device is a vertical conveyor.
[0016] Furthermore, the combined rotary screen-air separation impurity removal device includes a rotary screen section and an air separation section from top to bottom. The rotary screen section includes a rotary screen machine, which is equipped with two layers of screens. The internal space of the rotary screen machine is divided into three areas: upper, middle, and lower. The upper area is connected to the outlet of the third conveying device, and material outlets are provided in the upper, middle, and lower areas. The air separation section includes an air separator. The discharge ports of the middle and lower areas of the rotary screen machine are connected to the inlet of the air separator, and the outlet of the air separator is connected to the inlet of the fourth conveying device.
[0017] Furthermore, the outlet of the first spectral separator is also equipped with several spectral separators connected in series.
[0018] The beneficial effects of this invention are: by setting up reasonable conveying and processing components, this invention can not only realize the continuous processing of jasmine tea, but also effectively avoid tea loss during the tea processing process, which is conducive to the large-scale production of tea. Attached Figure Description
[0019] Figure 1 A schematic diagram of the structure of a production line for the continuous removal of insects from jasmine and tea flowers; Figure 2 This is a schematic diagram of the structure of the first rotary screen. Figure 3 This is a schematic diagram of a vertical conveyor. Figure 4 This is a schematic diagram of the internal structure of a vertical conveyor. Figure 5 This is a schematic diagram of a suction-type air separator; The components include: 1. First conveying device; 2. Tea feeding device; 3. First rotary screen; 31. Screen; 32. Material outlet; 4. Second conveying device; 5. First air separator; 51. Shell; 52. Air inlet; 53. Air outlet; 54. Grille; 55. Dust collection box; 56. Exhaust fan; 57. Arc-shaped baffle; 58. Impurity removal port; 6. Conveyor belt; 7. First color sorter; 8. Third conveying device; 9. Rotary screen-air separator combined impurity removal device; 10. Fourth conveying device; 11. First spectral sorter; 101. Upper frame; 102. Lower frame; 103. Upper housing; 104. Lower housing; 105. Gear disc; 106. Transmission chain; 107. Feed inlet; 108. Discharge outlet; 109. Concave material plate. Detailed Implementation
[0020] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0021] In embodiments of the present invention, such as Figures 1-5 As shown, a continuous production line for removing jasmine flower insects is disclosed. A schematic diagram of the structure of the continuous jasmine flower insect removal production line of this invention is shown below. Figure 1 As shown, the invention includes a tea feeding device 2 and a first rotary screen 3 connected by a first conveying device 1. The function of the tea feeding device 2 is to convey tea leaves requiring impurity removal to the first conveying device 1. All existing devices capable of this function are applicable to this invention, such as screw feeders. Furthermore, to ensure better transfer of tea leaves from the tea feeding device 2 to the first conveying device 1, an automatic feeding vibrating disc is provided at the end of the tea feeding device 2. The vibration of the automatic feeding vibrating disc evenly feeds the tea leaves into the first conveying device 1. The function of the first conveying device 1 is to feed tea leaves requiring impurity removal into the first rotary screen 3. Again, all existing devices capable of this function are applicable to this invention. Due to space limitations in the production area, in a preferred embodiment of this invention, the first conveying device 1 adopts... Figure 3 and 4The vertical conveyor shown includes an upper frame 101 and a lower frame 102. An upper housing 103 and a lower housing 104 are respectively installed at the upper and lower ends of the upper and lower frames 101 and 102. A rotating shaft with a gear disc 105 is installed inside either the upper housing 103 or the lower housing 104. A motor is installed inside either the lower housing 104 or the upper housing 103. A gear disc 105 is installed on the rotating shaft of the motor. The two gear discs 105 are connected by a transmission chain 106. When the motor is running, it can drive the transmission chain 106 to rotate. Several concave material plates 109 are fixedly connected to the outside of the transmission chain 106 by welding, hinge, or other methods. A feed inlet 107 is provided on the side of the lower housing 104 near the upper frame 101, and a discharge outlet 108 is provided on the side of the upper housing 103 near the lower frame 102. Tea leaves exiting from the tea feeding device 2 enter the vertical conveyor through the inlet 107 and are distributed into the concave plate 109. Driven by the transmission chain 106, the concave plate 109 moves upward and transports the tea leaves to the outlet 108. At the outlet 108, the concave plate 109 flips over, and the tea leaves it holds enter the next component from the outlet 108, completing the vertical conveying of the tea leaves.
[0022] The outlet of the first conveying device 1 is connected to a first rotary sieve 3. The structure and working principle of the first rotary sieve 3 are similar to those of existing vibrating sieves (such as the vibrating sieve produced by Gaofu Machinery Co., Ltd.). In order to adapt to the sieving of tea leaves, the structure of the present invention has been appropriately optimized. The structural schematic diagram of the optimized first rotary sieve 3 is shown below. Figure 2 As shown, the first rotary screen 3 has two layers of screens 31 inside, dividing the internal space of the first rotary screen 3 into three areas: upper, middle, and lower. The upper area is connected to the outlet of the first conveying device 1, and each of the upper, middle, and lower areas has a material outlet 32. During the screening process, the first rotary screen 3 performs planar rotary motion, using the different centrifugal forces acting on the tea leaves to screen them. The screened tea leaves and impurities flow out through the material outlets 32 of different areas, achieving the separation of impurities and tea leaves of different sizes. In order to effectively remove larger impurities such as branches and bamboo pieces from the tea leaves and to grade the tea leaves, the mesh diameter of the upper screen 31 inside the first rotary screen 3 is larger than that of the lower screen 31, and the two layers of screens 31 are tilted at an angle of 3~10° to produce a better separation effect during the rotation process.
[0023] The discharge port of the central area of the first rotary sieve 3 is connected to the first air separator 5 via the second conveying device 4. The function of the second conveying device 4 is to send the tea leaves from the first rotary sieve 3 into the first air separator 5 for sorting. All existing devices capable of this function are applicable to this invention. To save space, the second conveying device 4 preferably uses the aforementioned vertical conveyor. In this step, the material to be processed is reasonably graded according to its shape, length, and size. Impurities of different sizes contained in the material are also graded accordingly, so that subsequent processes can process them separately according to their physical and chemical properties. In a preferred embodiment of this invention, the first air separator 5 is preferably a suction-type air separator. A schematic diagram of the suction-type air separator in this invention is shown below. Figure 5 As shown, the housing includes a casing 51. An air inlet 52 is located on one side of the casing 51, and an air outlet 53 is located on the other side opposite the air inlet 52. A grille 54 is installed at the air outlet 53, and a dust collection box 55 is installed outside the air outlet 53. An exhaust fan 56 is installed between the air inlet 52 and the air outlet 53. When the exhaust fan 56 is working, it draws air in from the air inlet 52 and discharges it from the air outlet 53, thus creating a negative pressure space inside the casing 51. An arc-shaped baffle 57 is installed above the exhaust fan 56, which directs airflow... The air is evenly distributed and impurities are prevented from being sucked into the blower 56. At the same time, the arc-shaped baffle 5 divides the internal space of the housing 51 into two parts. Each part has a dust removal port 58 at the bottom. Heavier tea fragments or impurities flow out from the dust removal port 58 at the bottom of the first chamber, while lighter impurities flow out from the dust removal port 58 at the bottom of the second chamber. This suction-type air separator can efficiently separate light impurities, improve the purity and appearance of the product, and has a dust collection box to prevent dust. In addition, it has a low degree of damage to the material and ensures its integrity. A channel for tea leaves is provided between the outlet of the second conveying device 4 and the air inlet 52 of the suction-type air separator; a conveyor belt 6 is installed below the channel; when the second conveying device 4 transports the tea leaves to the air inlet 52 of the suction-type air separator, the tea leaves and impurities are sucked into the housing 51, while the heavier tea leaves fall vertically from the channel onto the conveyor belt 6, and are then fed into the subsequent first color sorter 7 for color sorting. The first color sorter 7 further removes any remaining impurities based on the difference in color between the tea leaves and impurities, achieving the purpose of tea refining. Moreover, to achieve a better impurity removal effect, a second air separator can be connected to the outlet of the first color separator 7 via a fifth conveying device. The outlet of the second air separator is equipped with a conveyor belt, and the second color sorter is installed at the end of the conveyor belt; the fifth conveying device can be the aforementioned vertical conveyor; that is, multiple sets of air separators and color sorters can be installed in series at the outlet of the first color separator 7 to achieve a better impurity removal effect. Any existing device that can separate materials by color difference can be used as the color sorter in this invention.
[0024] The discharge port of the lower area of the first rotary sieve 3 is connected to a rotary sieve-air separation combined impurity removal device 9 via a third conveying device 8. The outlet of the rotary sieve-air separation combined impurity removal device 9 is connected to a first spectral separator 11 via a fourth conveying device 10. The function of the third conveying device 8 and the fourth conveying device 10 is to convey the sorted tea leaves. All devices in the prior art that can achieve this function are applicable to this invention. However, in order to save space, the third conveying device 8 and the fourth conveying device 10 preferably adopt the above-mentioned vertical conveyor. The combined rotary sieve-air separation impurity removal device 9 comprises, from top to bottom, a rotary sieve section and an air separation section. The rotary sieve section includes a rotary sieve machine with two layers of screens. The internal space of the rotary sieve machine is divided into three areas: upper, middle, and lower. The upper area is connected to the outlet of the third conveying device 8, and each of the upper, middle, and lower areas has a material outlet. The air separation section includes an air separator. The outlets of the middle and lower areas of the rotary sieve machine are connected to the inlet of the air separator, and the outlet of the air separator is connected to the inlet of the fourth conveying device 10. The first spectral separator 11 further removes remaining impurities by utilizing the differences in the spectra of tea leaves and impurities, achieving the purpose of tea refining. Furthermore, to achieve better impurity removal, multiple spectral separators can be connected in series at the outlet of the first spectral separator 11, achieving better impurity removal through multiple spectral separations. Existing devices capable of separating materials by identifying chlorophyll in the material through spectral differences can all be used as the spectral separators in this invention.
[0025] Although specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims are still within the scope of protection of this patent.
Claims
1. A continuous production line for removing tea bugs from jasmine tea, characterized in that: The tea leaf feeding device (2) and the first rotary screen (3) are connected by the first conveying device (1); two layers of screen meshes (31) are arranged in the first rotary screen (3), the internal space of the first rotary screen (3) is divided into three regions of an upper part, a middle part and a lower part by the two layers of screen meshes (31), the upper part region is communicated with the first conveying device (1), the upper part region, the middle part region and the lower part region are all provided with material outlets (32); the material outlet of the middle part region of the first rotary screen (3) is connected with the first winnowing machine (5) through the second conveying device (4), the material outlet of the first winnowing machine (5) is provided with a conveying belt (6), the end of the conveying belt (6) is provided with the first color sorter (7); the material outlet of the lower part region of the first rotary screen (3) is connected with the rotary screen-winnowing combined impurity removal device (9) through the third conveying device (8), the outlet of the rotary screen-winnowing combined impurity removal device (9) is connected with the first spectrum sorter (11) through the fourth conveying device (10).
2. The continuous production line for removing the jasmine tea flower worm according to claim 1, characterized in that: The tea leaf feeding device (2) is a spiral feeder.
3. The continuous production line for removing the tea bugs from jasmine tea according to claim 2, characterized in that: The end of the spiral feeder is provided with an automatic feeding vibration disc.
4. The continuous production line for removing the jasmine tea flower worm according to claim 1, characterized in that: The first conveying device (1), the second conveying device (4), the third conveying device (8) and the fourth conveying device (10) are vertical conveyors; the vertical conveyor comprises an upward frame (101) and a downward frame (102), upper and lower ends of the upward frame (101) and the downward frame (102) are respectively provided with an upper box body (103) and a lower box body (104), a rotating shaft with a gear disc (105) is arranged in the upper box body (103) or the lower box body (104), a motor is arranged in the lower box body (104) or the upper box body (103), a gear disc (105) is arranged on the rotating shaft of the motor, the two gear discs (105) are connected through a transmission chain (106), a plurality of concave material plates (109) are arranged on the transmission chain (106); a feeding port (107) is arranged on one side of the lower box body (104) close to the upward frame (101), a discharging port (108) is arranged on one side of the upper box body (103) close to the downward frame (102).
5. The continuous production line for removing the jasmine tea flower worm according to claim 1, characterized in that: The mesh hole diameter of the upper screen mesh (31) in the first rotary screen is greater than that of the lower screen mesh (31).
6. The continuous production line for removing tea bugs from jasmine tea according to claim 5, characterized in that: The two layers of screen meshes (31) in the first rotary screen (3) are arranged in an inclined manner, and the inclination angle is 3-10°.
7. The continuous production line for removing the jasmine tea flower worm according to claim 1, characterized in that: The first winnowing machine (5) is a suction type winnowing machine; the suction type winnowing machine comprises a shell (51), one side of the shell (51) is provided with an air inlet (52), the other side opposite to the air inlet (52) is provided with an air outlet (53), the air outlet (53) is provided with a grid (54), the outside of the air outlet (53) is provided with a dust accumulation box (55); the air inlet (52) and the air outlet (53) are provided with an air guide fan (56), the air guide fan (56) is provided with an arc-shaped baffle (57) above, the arc-shaped baffle (57) divides the internal space of the shell (51) into two parts, the bottom of each part of the space is provided with a foreign matter removal opening (58); the outlet of the automatic feeding vibration disc is provided with a channel for tea leaves to pass between the air inlet (52) of the suction type winnowing machine; the conveying belt (6) is arranged below the channel.
8. The continuous production line for removing the jasmine tea flower worm according to claim 1, characterized in that: The outlet of the first color sorter (7) is further connected with a second winnowing machine through a fifth conveying device, the outlet of the second winnowing machine is provided with a conveying belt, and the end of the conveying belt is provided with a second color sorter; the fifth conveying device is a vertical conveyor.
9. The continuous production line for removing the jasmine tea flower worm according to claim 1, characterized in that: The spin screen-winnowing combined foreign matter removal device (9) comprises a spin screen part and a winnowing part from top to bottom; the spin screen part comprises a spin screen machine, two layers of screen meshes are arranged in the spin screen machine, the internal space of the spin screen machine is divided into three regions of an upper part, a middle part and a lower part by the two layers of screen meshes, the upper part region is in communication with the outlet of the third conveying device (8), and the upper part region, the middle part region and the lower part region are all provided with material outlets; the winnowing part comprises a winnowing machine, the outlets of the middle part region and the lower part region of the spin screen machine are in communication with the inlet of the winnowing machine, and the outlet of the winnowing machine is in communication with the inlet of the fourth conveying device (10).
10. The continuous production line for removing the jasmine tea flower worm according to claim 1, characterized in that: The outlet of the first light spectrum sorting machine (11) is further provided with a plurality of light spectrum sorting machines in a series connection mode.