Large-leaf tea standard impurity removal production line

Abstract

The invention discloses a large-leaf tea standard impurity removal production line, and particularly relates to the technical field of tea leaf processes, the large-leaf tea standard impurity removal production line comprises an impurity removal mechanism and a conveying mechanism, the impurity removal mechanism comprises a negative pressure winnowing machine, a tea refining machine, an electrostatic impurity removal machine, a first carding machine, a brush roller machine, a first shaking and screening machine, a tea leaf color sorter, a second carding machine, a second shaking and screening machine and an infrared color sorter; the conveying mechanism comprises a first conveyor, a second conveyor, a third conveyor, a first material returning conveyor, a Z-shaped elevator, a second material returning conveyor, a first material discharging conveyor, a transition conveyor, a fourth conveyor, a second Z-shaped elevator and a second material discharging conveyor. Through standardized process, multi-stage precise impurity removal, intelligent control and circular treatment design, the problems of poor impurity removal effect and low automation in the prior art are systematically solved, equipment is effectively connected to form a production line, automation of the whole line is realized, the tea quality is improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tea processing techniques, and in particular to a standard impurity removal production line for large-leaf tea. Background Art

[0002] The tea trees of large-leaf tea are tall, with large and thick leaves and an early germination period. They are rich in internal substances and are suitable for making various types of tea. The tea products made have a strong taste and high steeping resistance, and are most famous for Pu-erh tea. In the processing of large-leaf tea, the impurity removal process is one of the key steps to ensure the quality of tea.

[0003] The inventor found that there are at least the following problems in the prior art:

[0004] First of all, there is a lack of a unified impurity removal standard in the existing technology. Different processing factories or operators may adopt different impurity removal methods and standards, resulting in uneven impurity removal effects. This not only affects the overall quality of tea but also increases the difficulty of quality control;

[0005] Secondly, the impurity removal effect of the existing technology is not ideal. Many processes can only remove some impurities in the tea and cannot completely remove them. Especially for some fine or hidden impurities inside the tea, traditional impurity removal methods are often powerless;

[0006] In addition, the automation level of the existing large-leaf tea impurity removal process is generally low. Most processes still rely on manual operation, which not only reduces production efficiency but also increases labor costs and labor intensity. At the same time, the uncertainty of manual operation also increases the risk of tea quality fluctuations.

[0007] Therefore, the above technical problems need to be solved. Summary of the Invention

[0008] The purpose of the present invention is to provide a standard impurity removal production line for large-leaf tea to solve the problems of non-standardization, unsatisfactory impurity removal effect, low automation level, and high processing cost in the existing large-leaf tea impurity removal process.

[0009] To solve the above technical problems, the basic technical solution proposed by the present invention is:

[0010] A standard impurity removal production line for large-leaf tea includes an impurity removal mechanism and a conveying mechanism. The impurity removal mechanism includes a negative pressure air separator, a fine tea machine, an electrostatic impurity remover, a first carding machine, a hair roller machine, a first shaking sieve machine, a tea color sorter, a second carding machine, a second shaking sieve machine, and an infrared color sorter. The conveying mechanism includes a first conveyor, a second conveyor, a third conveyor, a first return conveyor, a Z-type elevator, a second return conveyor, a first discharge conveyor, a transition conveyor, a fourth conveyor, a second Z-type elevator, and a second discharge conveyor. The first discharge ends of the tea color sorter and the infrared color sorter are located at the loading ends of the first discharge conveyor and the second discharge conveyor. The second discharge ends of the tea color sorter and the infrared color sorter are respectively located at the loading ends of the fourth conveyor and the transition conveyor. The feeding ends of the tea color sorter and the infrared color sorter are respectively located at the discharging openings of the Z-type elevator and the second Z-type elevator.

[0011] Preferably, the output end of the negative pressure air separator is located above the fine tea machine, and a first conveyor and a second conveyor are sequentially arranged at the discharging end of the fine tea machine.

[0012] Preferably, the discharging end of the second conveyor is located at the feeding port of the electrostatic impurity remover, and the discharging part of the electrostatic impurity remover is connected to the feeding port of the first carding machine through the third conveyor.

[0013] Preferably, the discharging port of the first carding machine is located above the hair roller machine, the discharging port of the hair roller machine is located at the loading end of the first shaking sieve machine, and the discharging end of the first shaking sieve machine fits the loading port of the Z-type elevator.

[0014] Preferably, the loading end of the second carding machine is located at the discharging end of the fourth conveyor, the discharging part of the second carding machine is located at the loading port of the second shaking sieve machine, and the discharging port of the second shaking sieve machine is located at the loading end of the second Z-type elevator.

[0015] Preferably, the discharging port of the transition conveyor is sequentially connected to the second return conveyor and the first return conveyor, and the discharging end of the first return conveyor is located at the feeding port of the first carding machine.

[0016] Preferably, two first discharge conveyors are arranged side by side and connected to the discharging end of the tea color sorter.

[0017] Preferably, the production line further includes a PLC control system.

[0018] The beneficial effects of the present invention are as follows:

[0019] First, by setting up a series of multiple processes such as negative pressure air separation, electrostatic adsorption, mechanical carding, hair roller impurity removal, screening, color sorting, and infrared detection, a unified impurity removal process is established, solving the problem of uneven impurity removal effects caused by different methods in the prior art, ensuring the stability and controllability of tea quality, and realizing the standardization of the impurity removal process.

[0020] Second, the present invention improves the comprehensiveness and thoroughness of impurity removal by setting up a tea color sorter and an infrared color sorter, and performing cyclic material return through a transition conveyor, a return conveyor II, and a return conveyor I to perform multiple cyclic treatments on the tea that has not been completely de - impurities.

[0021] Third, the seamless connection between the impurity removal mechanism and the conveying mechanism set in the present invention, in cooperation with the PLC control system, realizes full - process linkage adjustment and fault alarm, reduces manual intervention, lowers labor intensity and costs, and at the same time improves production continuity and stability, thereby enhancing the degree of automation and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the top view of the production line of Embodiment 1 of the present invention;

[0023] Figure 2 for Embodiment 1 of the present invention Figure 1 is the schematic structural view from the A - direction perspective in;

[0024] Figure 3 for Embodiment 1 of the present invention Figure 1 is the schematic structural view from the B - direction perspective in;

[0025] Figure 4 for Embodiment 1 of the present invention Figure 1 is the schematic structural view from the C - direction perspective in;

[0026] Figure 5 for Embodiment 1 of the present invention Figure 1 is the schematic structural view from the D - direction perspective in.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS:

[0028] 1, negative pressure air - separation machine; 2, fine tea machine; 3, conveyor I; 4, conveyor II; 5, electrostatic impurity removal machine; 6, conveyor III; 7, carding machine I; 8, hair roller machine; 9, shaking sieve machine I; 10, return conveyor I; 11, Z - type elevator; 12, return conveyor II; 13, tea color sorter; 14, discharge conveyor I; 15, transition conveyor; 16, conveyor IV; 17, carding machine II; 18, shaking sieve machine II; 19, Z - type elevator II; 20, infrared color sorter; 21, discharge conveyor II. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Please refer to the following Figures 1 to 5 shown, and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0030] It should be noted that if there are directions involved in the embodiments of the present invention, they shall be based on the directions shown in the drawings, such as front and back. Figure 1 The specific Figure 1 The left side is the front, Figure 1 The right side is the back; at the same time Figure 2 As shown in the figure, the left-right direction is roughly the horizontal direction, and the up-down direction shown in the figure is the vertical direction. If a certain posture changes, the directional indication will also change accordingly.

[0031] The present invention provides a large-leaf tea standard impurity removal production line, including an impurity removal mechanism and a conveying mechanism. The impurity removal mechanism includes a negative pressure air separator 1, a fine tea machine 2, an electrostatic impurity remover 5, a combing machine 7, a hair roller machine 8, a shaking screen machine 9, a tea color sorter 13, a combing machine 17, a shaking screen machine 18, and an infrared color sorter 20. The conveying mechanism includes a conveyor 1 3, a conveyor 2 4, a conveyor 3 6, a return conveyor 10, a Z-type elevator 11, a return conveyor 2 12, a discharge conveyor 14, a transition Conveyor 15, conveyor four 16, Z-type elevator two 19 and discharge conveyor two 21, the first discharge ends of the tea color sorter 13 and the infrared color sorter 20 are located at the feeding ends of the discharge conveyor one 14 and the discharge conveyor two 21, the second discharge ends of the tea color sorter 13 and the infrared color sorter 20 are respectively located at the feeding ends of the conveyor four 16 and the transition conveyor 15, and the feeding ends of the tea color sorter 13 and the infrared color sorter 20 are respectively located at the discharge ports of the Z-type elevator 11 and the Z-type elevator two 19;

[0032] The tea color sorter 13 and the infrared color sorter 20 are both five-level color sorters in the prior art. The tea color sorter 13 identifies foreign colored impurities based on a high-speed camera and a lighting system, and removes unqualified tea leaves through high-pressure airflow, while the infrared color sorter 20 detects insect bites, mildew, and hidden impurities inside the tea leaves through infrared rays, and removes unqualified parts through high-pressure airflow. The pressure of the high-pressure airflow jet device in both is 0.3-0.8MPa, and the nozzle spacing is 5-15cm;

[0033] In addition, the optional production lines include: a magnetic separator, located before the input end of the negative pressure air separator 1, for removing magnetic impurities; an X-ray machine, located at the rear end of the discharge conveyor 14 and the discharge conveyor 21, for final inspection.

[0034] In a further embodiment, the output end of the negative pressure air separator 1 is located above the fine tea machine 2, and the unloading end of the fine tea machine 2 is sequentially provided with a conveyor 1 3 and a conveyor 2 4.

[0035] In this embodiment, the negative pressure air separator 1 is used to separate light impurities in tea leaves by negative pressure, and a screening mechanism is provided inside to remove large impurities and stems.

[0036] In a further embodiment, the discharging end of conveyor two 4 is located at the feeding port of the electrostatic impurity remover 5, and the discharging part of the electrostatic impurity remover 5 is connected to the feeding port of the first carding machine 7 through conveyor three 6.

[0037] In this embodiment, the electrostatic impurity remover 5 removes minute impurities through the principle of electrostatic adsorption. The electrode plates of the electrostatic impurity remover (5) are arranged with alternating polarities, and the voltage is 5 - 15 kV to enhance the adsorption efficiency of minute impurities; both the first carding machine 7 and the second carding machine 17 straighten the tea leaves and remove the adhered impurities through mechanical carding mechanisms.

[0038] In a further embodiment, the discharging port of the first carding machine 7 is located above the hair roller machine 8, the discharging port of the hair roller machine 8 is located at the feeding end of the first shaking sieve machine 9, and the discharging end of the first shaking sieve machine 9 fits the feeding port of the Z - type elevator 11.

[0039] In this embodiment, the surface of the hair roller of the hair roller machine 8 is provided with fine fluff for removing thin grass sticks and leaf fragments. The fluff of the hair roller machine (8) is made of nylon or polyester material, and the density is 500 - 1000 roots / cm 2 , the roller speed is 10 - 30 rpm; both the first shaking sieve machine 9 and the second shaking sieve machine 18 separate the tea leaves that meet the specifications through vibration screening, and the sieve hole size is 2 - 5 mm, the vibration frequency is 15 - 30 Hz, and the amplitude is 2 - 5 mm.

[0040] In a further embodiment, the feeding end of the second carding machine 17 is located at the discharging end of conveyor four 16, the discharging part of the second carding machine 17 is located at the feeding port of the second shaking sieve machine 18, and the discharging port of the second shaking sieve machine 18 is located at the feeding end of the second Z - type elevator 19.

[0041] In this embodiment, conveyor four 16, the second carding machine 17, the second shaking sieve machine 18 and the second Z - type elevator 19 connect the tea color sorter 13 and the infrared color sorter 20; the gap between the carding rollers of the first carding machine 7 and the second carding machine 17 is 0.5 - 2 mm, and the roller speed difference is 5 - 15 rpm.

[0042] In a further embodiment, the discharging port of the transition conveyor 15 is sequentially connected to the second return conveyor 12 and the first return conveyor 10, and the discharging end of the first return conveyor 10 is located at the feeding port of the first carding machine 7.

[0043] In this embodiment, the transition conveyor 15 and the second Z - type elevator 19 are staggered, so that the unqualified tea leaves separated by the infrared color sorter 20 can pass through the transition conveyor 15, the second return conveyor 12 and the first return conveyor 10 in sequence and return to the first carding machine 7 for re - cycling treatment.

[0044] In a further embodiment, there are two discharging conveyors one 14 connected in parallel at the discharging end of the tea color sorter 13.

[0045] In this embodiment, both the first discharge conveyor 14 and the second discharge conveyor 21 are used to convey the separated and qualified tea leaves.

[0046] In a further embodiment, the production line further includes a PLC control system.

[0047] In this embodiment, the PLC control system is used to jointly adjust the operating parameters of each device and for fault alarm.

[0048] The working principle of the present invention is as follows:

[0049] Initial impurity removal and conveying stage: When the tea leaves are picked and concentrated, they are placed in the negative pressure air separator 1. Through the negative pressure of the negative pressure air separator 1, the light and heavy impurities in the tea leaves are separated. The light floating impurities are sucked away, and the heavier tea leaves are conveyed into the interior of the fine tea machine 2. Through the specific screening mechanism inside the fine tea machine 2, larger particle impurities, stems, etc. that do not meet the specifications are further screened out, improving the purity of the tea leaves. The tea leaves coming out of the discharge port of the fine tea machine 2 will be conveyed to the interior of the static electricity impurity remover 5 through the first conveyor 3 and the second conveyor 4. Through the principle of static electricity adsorption of the static electricity impurity remover 5, tiny impurities with charges such as hair and fibers are adsorbed and removed, while the physical properties of the tea leaves themselves make them not easily adsorbed, thus realizing the separation of impurities and tea leaves. Subsequently, the tea leaves are conveyed to the interior of the first carding machine 7 through the third conveyor 6. Through the mechanical carding mechanism inside the first carding machine 7, the tea leaves are straightened and some adhered or entangled impurities are further removed, making the tea leaves more loose and pure. The discharging end of the first carding machine 7 directly conveys the tea leaves into the hair roller machine 8. Through the fine fluff on the surface of the hair roller, when the tea leaves pass by, the fluff will hook some impurities in the tea leaves such as small straws and leaf fragments, and the impurities are taken away from the tea leaves as the hair roller rotates. Immediately afterwards, the discharging end of the hair roller machine 8 conveys the tea leaves into the first shaking sieve 9. Through the principle of vibration screening, the tea leaves with different sizes of particles are separated. The tea leaf particles that meet the requirements can pass through the sieve holes, while the larger impurities remain on the sieve surface and are removed. Finally, the tea leaves discharged from the first shaking sieve 9 are conveyed into the tea color sorter 13 through the Z-shaped elevator 11;

[0050] First color sorting and reprocessing stage: After the tea leaves enter the five-level tea color sorter 13, with the cooperation of the high-speed camera and the lighting system, the computer control system analyzes the color information of the tea leaves in real time. When detecting different-color impurities, they are blown out by high-pressure air flow. The qualified tea leaves are discharged from the first discharge port of the tea color sorter 13 and conveyed to the inspection through the first discharge conveyor 14. Part of the tea leaves with impurities not completely removed will be discharged from the second discharge port of the tea color sorter 13 and enter the infrared color sorter 20 after being processed by the fourth conveyor 16, the second carding machine 17, the second shaking sieve 18, and the second Z-type elevator 19 in sequence. When the tea leaves enter the five-level infrared color sorter 20, infrared detection technology is used to make the infrared rays penetrate a certain depth of the tea leaf surface to detect possible problems such as insect damage and mildew inside the tea leaves and some impurities that are difficult to detect under visible light. Similarly, the unqualified part is removed by high-pressure air flow. The qualified tea leaves are discharged from the first discharge port and conveyed to the inspection through the second discharge conveyor 21. The qualified ones will be discharged from the second discharge port of the infrared color sorter 20 and conveyed to the inside of the first carding machine 7 through the transition conveyor 15, the second return conveyor 12, and the first return conveyor 10 in sequence, and the first carding machine 7 will reprocess and convey the tea leaves to form a cycle;

[0051] Optional production line: Before the tea leaves are poured into the input end of the negative-pressure air separator 1, the tea leaves can be first put into a magnetic separator to remove magnetic impurities in the tea leaves by using the attraction of the magnetic field to magnetic substances; in addition, the tea leaves conveyed out by the first discharge conveyor 14 and the second discharge conveyor 21 can be inspected by an X-ray machine for final inspection to further ensure the purity and safety of the tea leaves and provide the final guarantee for product quality.

[0052] According to the disclosure and teaching of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A standard impurity removal production line for large-leaf tea, comprising an impurity removal mechanism and a conveying mechanism, characterized in that, The impurity removal mechanism includes a negative pressure air separator (1), a fine tea machine (2), an electrostatic impurity remover (5), a first carding machine (7), a hair roller machine (8), a first shaking sieve machine (9), a tea color sorter (13), a second carding machine (17), a second shaking sieve machine (18), and an infrared color sorter (20). The conveying mechanism includes a first conveyor (3), a second conveyor (4), a third conveyor (6), a first return conveyor (10), a Z-type elevator (11), a second return conveyor (12), a first discharge conveyor (14), a transition conveyor (15), a fourth conveyor (16), a second Z-type elevator (19), and a second discharge conveyor (21). The first discharge ends of the tea color sorter (13) and the infrared color sorter (20) are located at the feeding ends of the first discharge conveyor (14) and the second discharge conveyor (21). The second discharge ends of the tea color sorter (13) and the infrared color sorter (20) are respectively located at the feeding ends of the fourth conveyor (16) and the transition conveyor (15). The feeding ends of the tea color sorter (13) and the infrared color sorter (20) are respectively located at the discharging openings of the Z-type elevator (11) and the second Z-type elevator (19).

2. The standard impurity removal production line for large-leaf tea according to claim 1, characterized in that: The output end of the negative pressure air separator (1) is located above the fine tea machine (2), and the discharging end of the fine tea machine (2) is successively provided with a first conveyor (3) and a second conveyor (4).

3. The standard impurity removal production line for large-leaf tea according to claim 1, wherein: The discharging end of the second conveyor (4) is located at the feeding port of the electrostatic impurity remover (5), and the discharging part of the electrostatic impurity remover (5) is connected to the feeding port of the first carding machine (7) through a third conveyor (6).

4. The standard impurity removal production line for large-leaf tea according to claim 1, characterized in that: The discharging port of the first carding machine (7) is located above the hair roller machine (8), the discharging port of the hair roller machine (8) is located at the feeding end of the first shaking sieve machine (9), and the discharging end of the first shaking sieve machine (9) fits the feeding port of the Z-type elevator (11).

5. The standard impurity removal production line for large-leaf tea according to claim 1, characterized in that: The feeding end of the second carding machine (17) is located at the discharging end of the fourth conveyor (16), the discharging part of the second carding machine (17) is located at the feeding port of the second shaking sieve machine (18), and the discharging port of the second shaking sieve machine (18) is located at the feeding end of the second Z-type elevator (19).

6. The standard impurity removal production line for large-leaf tea according to claim 1, characterized in that: The discharging port of the transition conveyor (15) is successively connected to the second return conveyor (12) and the first return conveyor (10), and the discharging end of the first return conveyor (10) is located at the feeding port of the first carding machine (7).

7. A standard impurity removal production line for large-leaf tea according to claim 1, characterized in that: There are two first discharge conveyors (14) connected side by side at the discharging end of the tea color sorter (13).

8. The standard impurity removal production line for large-leaf tea according to claim 1, characterized in that: The production line also includes a PLC control system.

9. The standard impurity removal production line for large-leaf tea according to claim 1, wherein: The technological process is as follows: S1: The tea passes through the negative pressure air separator (1), the fine tea machine (2), the first conveyor (3), the second conveyor (4), the electrostatic impurity remover (5), and the third conveyor (6) for processing and conveying in sequence and then enters the first carding machine (7). S2: The tea enters the interior of the tea color sorter (13) after passing through the first carding machine (7), the hair roller machine (8), the first shaking sieve machine (9), and the Z-type elevator (11) for processing and conveying in sequence. S3: After the tea leaves are processed by the tea color sorter (13), they come out from the second discharge port of the tea color sorter (13), and after being processed and conveyed by the conveyor four (16), the carding machine two (17), the shaking sieve machine two (18) and the Z-type elevator two (19) in sequence, they enter the infrared color sorter (20) for processing; S4: After the tea leaves are processed by the infrared color sorter (20), they come out from the second discharge port of the infrared color sorter (20), and after being conveyed by the transition conveyor (15), the return conveyor two (12) and the return conveyor one (10) in sequence, they re-enter the carding machine one (7); S5: The carding machine one (7) processes the tea leaves entering from the conveyor three (6) and the return conveyor one (10) simultaneously, and then the tea leaves will repeat the cycle of S2 to S4; S6: The tea leaves qualified by the tea color sorter (13) and the infrared color sorter (20) in S3 and S4 will always be discharged from the first discharge ends of the two, and are conveyed out through the discharge conveyor one (14) and the discharge conveyor two (21) respectively; S7: Before placing the tea leaves above the negative pressure air separator 1, the tea leaves can be placed in a magnetic separator to remove magnetic impurities; S8: After S6, an X-ray machine can be used to conduct the final inspection of the tea leaves conveyed by the discharge conveyor one (14) and the discharge conveyor two (21) on the production line.

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