CN113695217A

CN113695217A - Tea leaf impurity removing device

Info

Publication number: CN113695217A
Application number: CN202110852398.1A
Authority: CN
Inventors: 程萍; 邓威威; 程凤; 程林; 詹程咏怡; 詹昊; 程千俊
Original assignee: Anhui Huoshan Yuanyuanyuan Industry & Trade Co ltd
Current assignee: Anhui Huoshan Yuanyuanyuan Industry & Trade Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-11-26

Abstract

The invention discloses a tea leaf impurity removing device, which belongs to the field of tea leaf impurity removing equipment, wherein at least three screening cylinders are vertically arranged inside a shell in an aligned mode, screening holes with different mesh diameters are formed in the peripheral circumferences of the three screening cylinders at equal intervals, the diameters of the screening holes in the three screening cylinders are gradually reduced from top to bottom, a partition plate which is located on the diameter of each screening cylinder and divides the inside of each screening cylinder into two independent chambers is arranged inside each screening cylinder, strip-shaped material openings which are symmetrical relative to the partition plates and aligned with the middle of each screening cylinder are formed in each screening cylinder, and each strip-shaped material opening can be communicated with a material conveying groove under the rotation of each screening cylinder. According to the tea leaf sorting device, the partition plate is arranged in each stage of the screening cylinder, so that when a cavity above the inside of each stage of the screening cylinder is used for feeding, a cavity below the inside of the screening cylinder is used for discharging, namely the device can simultaneously feed and discharge, and through the arrangement of the three screening cylinders, the device can screen impurities with different diameters, so that the impurity removal effect of the device on tea leaves is improved.

Description

Tea leaf impurity removing device

Technical Field

The invention relates to the field of tea impurity removing equipment, in particular to a tea impurity removing device.

Background

Tea refers to the leaves and buds of tea tree. Broadly refers to the leaves of evergreen bush tea tree which can be used for making tea, and the beverage made by these leaves, later extended to all herbal teas made by plant flowers, leaves, seeds, roots, such as chrysanthemum tea, etc.; the tea leaves are required to be subjected to impurity removal treatment in the manufacturing process so as to ensure that the manufactured tea leaves can meet the manufacturing standard.

Present tealeaves removes device of miscellaneous usefulness, most adopt single appearance chamber to hold tealeaves and carry out centrifugal branch sieve to the tealeaves that holds, and tealeaves needs earlier the feeding before the screening, ejection of compact after the screening again, this kind of feeding, the ejection of compact is owing to can not go on simultaneously, lead to the device to need more time to advance around the screening, the ejection of compact, thereby the work efficiency of device has been influenced greatly, and because present majority device can not be continuous carry out multistage branch sieve processing to tealeaves, thereby the screening effect of device to tealeaves has been influenced.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide a tea leaf impurity removing device to solve the problems in the background technology.

2. Technical scheme

In order to solve the problems, the invention adopts the following technical scheme:

the utility model provides a tealeaves edulcoration device, includes the casing, the inside of casing is equipped with divides a sieve section of thick bamboo, divide a sieve section of thick bamboo to be equipped with three and vertical alignment setting at least, divide a sieve section of thick bamboo to be one grade sieve section of thick bamboo, two grades of sieve sections of grades and tertiary sieve section of thick bamboo that divides, and the peripheral week of three branch sieve section of thick bamboo circles impartial interval and offers the sieve mesh that the mesh diameter differs, and is three divide the diameter of sieve mesh on the sieve section of thick bamboo from last to gradual reduction down, the feed inlet of carrying out the defeated material to one-level sieve section of thick bamboo is offered on the top of casing, and the bottom of casing sets up the discharge gate that carries out the release to material in three grades of sieve section of thick bamboo, and every two adjacent branch sieve sections of thick bamboo all connect and communicate through defeated material groove one, and tertiary sieve section of thick bamboo below is equipped with the defeated material groove two that are located discharge gate top and communicate with the discharge gate, be equipped with the three branch sieve section of thick bamboo of drive and carry out pivoted actuating mechanism simultaneously on the casing, every the inside of branch sieve section of thick bamboo all be equipped with being located its diameter and separate into two independent cavities with its inside The board, every divide all to set up on the sieve section of thick bamboo about the division board symmetry and rather than the bar material mouth that the middle part aligns, and every bar material mouth can with defeated silo intercommunication under the rotation of dividing the sieve section of thick bamboo to the upper and lower both ends of every defeated silo one, the top of defeated silo two all laminate with corresponding branch sieve section of thick bamboo outer wall, every two articulated doors of opening, every are all installed to the inboard of bar material mouth the inside mechanism of opening that carries out sealedly to its opening end portion that is equipped with respectively of bottom, the defeated silo two of both ends, feed inlet about the defeated silo one.

Further, every the both sides of defeated silo one, defeated silo two all take shape to be equipped with and to carry out the water conservancy diversion and be the guide plate that the slope set up from the exhaust waste material in the corresponding sieve mesh, and the inner wall fixed connection of guide plate and casing, set up on the left and right sides wall of casing with the guide plate one-to-one and can carry out the bin outlet that carries to the waste material on the guide plate low end to all install sealing door, every on every bin outlet defeated silo all is erect in the inside of casing, every through the guide plate all glue on the lateral wall of branch sieve section of thick bamboo circular face and glue the sealing washer that has closely laminated with shells inner wall.

Furthermore, the driving mechanism comprises a first rotating shaft which is fixedly arranged on one of the screen separating cylinders and penetrates through the shell, the free end of the first rotating shaft is connected with a motor arranged on the outer wall of the shell, and the three screen separating cylinders are connected through a transmission mechanism.

Furthermore, drive mechanism is including fixed pivot two, the fixed cover respectively that locate three branch screen drum outer wall and homonymy setting locate every pivot two on and the vertical sprocket that aligns, three the sprocket passes through the chain and connects, pivot two sets up to pivot one dorsad, and pivot two runs through the casing to the sprocket is located the outside of casing.

Further, the mechanism of opening the door includes that two hinges locate defeated silo, the inside closing plate of feed inlet, and one end is fixed locate on defeated silo, the feed inlet inner wall and the other end and closing plate lateral wall fixed connection's spacing spring, spacing spring equidistant locates on the closing plate.

Further, every the closing plate all is arc column structure, and the outside terminal surface of every closing plate all with corresponding branch screen drum outer wall laminating.

Furthermore, each of the sieve separating cylinders is internally provided with an auxiliary mechanism for blowing air to two sides of the separating plate.

Further, the complementary unit is including offering in pivot two, divide two lateral walls of sieve tube fixedly connected with pivot and the inside inlet channel who communicates each other of division board, equidistant offering in the division board inside and with inlet channel vertically reposition of redundant personnel air flue, equidistant offering in the opening of division board both sides, install in every opening inside and with gaseous one-way check valve of carrying to dividing the sieve tube inside.

3. Advantageous effects

1. The invention divides the inside of each sub-screen cylinder into two independent chambers through a partition plate, when the arrangement ensures that two strip-shaped material openings on each sub-screen cylinder are opened and communicated with the ports of the corresponding material conveying groove and the material inlet, the two chambers in each sub-screen cylinder can be respectively in the states of feeding and discharging, namely, each sub-screen cylinder can feed and discharge at the same time, the arrangement greatly saves the time for feeding and discharging of the device and improves the working efficiency of the device, and the three sub-screen cylinders are vertically arranged in parallel, so that the sub-screen cylinder positioned above can automatically convey tea to the sub-screen cylinder positioned below the sub-screen cylinder, thereby ensuring that a plurality of sub-screen cylinders can continuously screen and remove impurities from the tea, and each sub-screen cylinder can screen impurities or waste materials with different diameters through the arrangement that the screen holes on each sub-screen cylinder are gradually reduced from top to bottom, so as to improve the impurity removal effect of the device on the tea.

2. When the two hinged doors on the strip-shaped material opening are driven by the motor or other driving parts to open outwards on the sieving cylinder, the end parts of the hinged doors extrude the sealing plate, and the two sealing plates located below or above the hinged door are opened as the hinged door is opened, therefore, the upper end and the lower end of the material conveying groove can be communicated with the corresponding sub-screening cylinders, so that the tea leaves in the upper stage of the sub-screening cylinder can enter the sub-screening cylinder of the next stage along the material conveying groove, the material conveying mechanism enables materials between the screening cylinders to be smoothly conveyed, improves the conveying effect of the device on tea, is beneficial to the tea screening, and when the sealing plate is opened under the driving of the hinged door, the limiting spring is compressed, the arrangement enables the hinged door to automatically reset under the elastic action of the limiting spring when the hinged door is closed and reset.

3. The end part end of the material conveying groove and the sealing plate are attached to the outer wall of the corresponding sub-sieve cylinder, so that the amount of impurities screened out can be reduced and the amount of the impurities screened out can fall on the top end of the material conveying groove and the top end of the sealing plate can be reduced, the sub-sieve cylinder is supported by the sliding contact of the outer wall of the sub-sieve cylinder with the material conveying groove and the sealing plate, the stability of the sub-sieve cylinder in work is improved, the impurities or waste materials screened out by the sub-sieve cylinder can fall on the flow guide plates and can move towards the lower end of the flow guide plates along the inclined surfaces of the flow guide plates, the guided collection of the screened impurities or waste materials is realized, when more impurities or waste materials are collected, the sealing doors can be opened to discharge the impurities or waste materials from the shell, the material discharging mode is simple, the flexibility of the device is improved, in addition, the sealing can be performed between the side wall of the circular surface of the sub-sieve cylinder and the shell through the sealing rings, and every two adjacent flow guide plates in the vertical direction are arranged on the inner wall of the shell, A sealed containing cavity is formed between the outer walls of the corresponding material conveying grooves, so that impurities or waste materials which are screened out cannot leak out and enter the next-stage screening process again, and the impurity removing effect of the device on tea leaves is influenced.

4. When the grade separation sieve cylinder rotates, compressed gas can be introduced into the air inlet channel and enters the two sides of the partition plate along the diversion air channel and the check valve on the opening, so that tea leaves in the grade separation sieve cylinder can be pneumatically expanded, the separation of impurities in the tea leaves and the tea leaves is facilitated, meanwhile, power can be improved for the impurities to pass through sieve pores, and the impurity removal effect of the device on the tea leaves is improved.

Drawings

FIG. 1 is a schematic front view of the internal structure of the present invention;

FIG. 2 is a side view of the internal structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the sieving cylinder in front view;

FIG. 4 is a schematic view of the inner structure of a feed chute;

FIG. 5 is a schematic structural view of the butt joint of the screening drum and the conveying chute;

fig. 6 is a partial structural schematic diagram of fig. 2.

Reference numerals: 1. a housing; 2. a first stage sieving cylinder; 3. a second stage sieve cylinder; 4. a three-stage sieving cylinder; 5. a feed inlet; 6. a first material conveying groove; 61. a second material conveying groove; 62. a baffle; 7. a discharge port; 8. a partition plate; 9. a strip material port; 10. a hinged door; 11. screening holes; 12. a sealing plate; 13. a limiting spring; 14. a discharge outlet; 15. a sealing door; 16. a first rotating shaft; 17. a motor; 18. a second rotating shaft; 19. a sprocket; 20. a chain; 21. an air intake passage; 22. shunting an air passage; 23. a one-way valve; 24. and (5) sealing rings.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

As shown in figures 1 and 2, a tea leaf impurity removing device comprises a shell 1, a screen separating cylinder is arranged inside the shell 1, at least three screen separating cylinders are vertically arranged in an aligned manner, the screen separating cylinders are respectively a first-level screen separating cylinder 2, a second-level screen separating cylinder 3 and a third-level screen separating cylinder 4, screen holes 11 with different mesh diameters are arranged on the peripheral circumference of the three screen separating cylinders at equal intervals, the diameters of the screen holes 11 on the three screen separating cylinders are gradually reduced from top to bottom, a feeding port 5 for feeding the first-level screen separating cylinder 2 is arranged at the top end of the shell 1, a discharging port 7 for releasing materials in the third-level screen separating cylinder 4 is arranged at the bottom end of the shell 1, every two adjacent screen separating cylinders are connected and communicated through a feeding groove 6, a feeding groove 61 which is arranged above the discharging port 7 and is communicated with the discharging port 7 is arranged below the third-level screen separating cylinder 4, a driving mechanism for driving the three screen separating cylinders to rotate simultaneously is arranged on the shell 1, the inside of each sub-screen cylinder is provided with a partition plate 8 which is positioned on the diameter of the sub-screen cylinder and divides the inside of the sub-screen cylinder into two independent chambers, each sub-screen cylinder is provided with strip material openings 9 which are symmetrical relative to the partition plate 8 and aligned with the middle part of the partition plate, each strip material opening 9 can be communicated with a material conveying groove under the rotation of the sub-screen cylinder, the upper end and the lower end of each material conveying groove I6 and the top end of each material conveying groove II 61 are attached to the outer wall of the corresponding sub-screen cylinder, the inner side of each strip material opening 9 is provided with a double-open hinged door 10, and the upper end and the lower end of each material conveying groove I6, the bottom end of the material inlet 5 and the inside of the top end of each material conveying groove II 61 are respectively provided with door opening mechanisms for sealing the opening end parts of the material conveying grooves;

as shown in fig. 1, 2, 4, 5, 6, the first and second conveying troughs 6, 61 are formed with guide plates 62 which can guide the waste discharged from the corresponding sieve pores 11 and are arranged obliquely, the guide plates 62 are fixedly connected with the inner wall of the casing 1, the left and right side walls of the casing 1 are provided with discharge ports 14 which correspond to the guide plates 62 one by one and can convey the waste at the lower end of the guide plates 62, each discharge port 14 is provided with a sealing door 15, each conveying trough is erected in the casing 1 through the guide plates 62, the side wall of the circular surface of each sub-sieve cylinder is adhered with a sealing ring 24 which is tightly adhered with the inner wall of the casing 1, the end part of the conveying trough and the sealing plate 12 are both adhered with the outer wall of the corresponding sub-sieve cylinder, thereby reducing the amount of the impurities which are screened out falling into the conveying trough and the top end of the sealing plate 12, and the waste which is separated from the outer wall of the sub-sieve cylinder and the conveying trough, The sliding contact of the sealing plate 12 supports the sieving barrel to improve the stability of the sieving barrel during operation, the impurities or waste materials sieved by the sieving barrel fall on the guide plate 62 and move towards the lower end of the guide plate 62 along the inclined surface of the guide plate 62, so that the impurities or waste materials sieved by the sieving barrel can be guided and collected, when more impurities or waste materials are collected, the sealing door 15 can be opened to discharge the impurities or waste materials from the shell 1, the discharging mode is simple, the flexibility of the device is improved, in addition, the sealing ring 24 can seal between the side wall of the circular surface of the sieving barrel and the shell 1, a sealed cavity is formed between the inner wall of the shell 1 and the outer wall of the corresponding material conveying groove between every two adjacent guide plates 62 in the vertical direction, so as to ensure that the impurities or waste materials sieved by the sieving barrel cannot leak and reenter the sieving process of the next stage, the impurity removal effect of the device on the tea is influenced;

as shown in fig. 1, the driving mechanism includes a first rotating shaft 16 fixedly arranged on one of the screening drums and penetrating through the housing 1, a free end of the first rotating shaft 16 is connected with a motor 17 mounted on an outer wall of the housing 1, the three screening drums are connected through a transmission mechanism, and the three screening drums can simultaneously rotate in one direction under the driving of the motor 17 under the driving of the transmission mechanism, so that the synchronous control of the three screening drums is realized, and people can adjust the feeding and discharging of the three screening drums at the same time; the transmission mechanism comprises second rotating shafts 18 which are fixedly arranged on the outer walls of the three screening barrels and arranged on the same side, and chain wheels 19 which are fixedly sleeved on the second rotating shafts 18 respectively and are vertically aligned, the three chain wheels 19 are connected through a chain 20, the second rotating shafts 18 are arranged back to the first rotating shafts 16, the second rotating shafts 18 penetrate through the shell 1, and the chain wheels 19 are positioned on the outer side of the shell 1;

as shown in fig. 1, 2, 4, 5 and 6, the door opening mechanism comprises two sealing plates 12 hinged inside the material conveying groove and the material inlet 5, a limiting spring 13 with one end fixed on the inner wall of the material conveying groove and the material inlet 5 and the other end fixedly connected with the side wall of the sealing plate 12, the limiting springs 13 are equidistantly arranged on the sealing plates 12, when two hinged doors 10 on the strip-shaped material port 9 are driven by a motor or other driving parts to open outwards on the screening cylinders, the end parts of the hinged doors 10 can extrude the sealing plates 12, and the two sealing plates 12 below or above the hinged doors 10 can also be opened along with the continued opening of the hinged doors 10, so that the upper and lower ends of the material conveying groove can be communicated with the corresponding screening cylinders, tea leaves in the previous screening cylinder can enter the next screening cylinder along the material conveying groove, the material conveying mechanism is arranged to enable materials between the screening cylinders to be smoothly conveyed, the conveying effect of the device on the tea is improved, and the tea screening is facilitated; each sealing plate 12 is of an arc-shaped structure, and the outer side end face of each sealing plate 12 is attached to the outer wall of the corresponding screening drum;

as shown in fig. 2, 3 and 6, each of the sieve cylinders is provided with an auxiliary mechanism for blowing air to two sides of the partition plate 8, the auxiliary mechanism includes a second rotating shaft 18, a second rotating shaft 18 and a gas inlet channel 21 which is arranged inside the partition plate 8 and is communicated with the second rotating shaft 18, the gas inlet channel 22 is arranged inside the partition plate 8 and is perpendicular to the gas inlet channel 21 at equal intervals, openings are arranged at two sides of the partition plate 8 at equal intervals, a one-way valve 23 is arranged inside each opening and is used for one-way conveying the gas to the inside of the sieve cylinder, the compressed gas can be introduced into the gas inlet channel 21 and enter two sides of the partition plate 8 along the branch gas channel 22 and the one-way valve 23 on the opening, so that the tea leaves inside the sieve cylinder can be pneumatically expanded, separation of impurities from the tea leaves is facilitated, and impurity removal effect of the device on the tea leaves is improved.

The specific application process of the tea impurity removing device is as follows: when the multi-stage separation sieve drum is used, the first rotating shaft 16 is driven to rotate through the rotation of the motor 17, and the three separation sieve drums are driven by the motor 17 to rotate in one direction due to the fact that the separation sieve drums are linked through the chain wheel 19 and the chain 20, so that impurities or waste materials with small diameters in tea leaves in the separation sieve drums can be separated from sieve holes 11 in the separation sieve drums under the action of centrifugal force when the separation sieve drums rotate, and the separated impurities or waste materials fall on the corresponding guide plates 62 and flow and gather downwards along the guide plates 62 which are arranged obliquely;

after screening for a certain time, the rotation angle of the motor 17 is controlled, so that the strip material openings 9 on each grade of screening cylinder can be vertically aligned with the ports of the adjacent material conveying grooves, the two strip material openings 9 are symmetrically arranged on the screening cylinder, so that the two strip material openings 9 on the first grade screening cylinder 2 can be vertically aligned with the material conveying grooves and the material inlet 5 respectively, then the hinged door 10 on each strip material opening 9 is controlled to be electrically driven to open outwards, the end part of the hinged door 10 can extrude the outer side wall of the sealing plate 12 adjacent to the hinged door 10 when the hinged door is opened, so that each material conveying groove and the sealing plate 12 on the material inlet 5 can be driven to open, the communication between the material inlet 5 and the upper cavity in the first grade screening cylinder 2, the communication between the two opposite cavities in each two adjacent screening cylinders, and the communication between the upper and lower cavities in the third grade screening cylinder 4 and the material outlet 7 are realized, the arrangement enables the upper cavities in each grade screening cylinder to feed simultaneously, the chamber below the inner part of each stage of the screening drum discharges materials simultaneously, so that the three screening drums not only can continuously screen the tea, but also can screen impurities with different diameters, and the impurity removal effect of the device on the tea is improved;

when the sealing plate 12 is driven by the hinged door 10 to be opened, the limiting spring 13 is compressed, and the arrangement enables the sealing plate 12 to automatically reset under the elastic action of the limiting spring 13 when the hinged door 10 is closed and reset;

when each grade sieve section of thick bamboo when rotating, can let in inlet channel 21 with the compressed gas, and along reposition of redundant personnel air flue 22, the both sides of division board 8 are got into to the check valve 23 on the opening, with this can carry out pneumatic type's bulging to the inside tealeaves of a branch sieve section of thick bamboo, be favorable to the separation of impurity and tealeaves in the tealeaves, the edulcoration effect of high installation to tealeaves, and when impurity or the waste material pile of guide plate 62 low-end department is more, release the impurity or the waste material of gathering through opening sealing door 15, the use of this tealeaves edulcoration device has just been accomplished like this.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. A tea leaf impurity removing device comprises a shell (1), wherein a branch screen cylinder is arranged inside the shell (1), and is characterized in that the branch screen cylinder is at least provided with three screen cylinders which are vertically aligned, the branch screen cylinders are respectively a first-level branch screen cylinder (2), a second-level branch screen cylinder (3) and a third-level branch screen cylinder (4), screen holes (11) with different mesh diameters are uniformly formed in the periphery circumference of the three branch screen cylinders, the diameter of the screen holes (11) in the branch screen cylinders is gradually reduced from top to bottom, a feeding hole (5) for feeding materials to the first-level branch screen cylinder (2) is formed in the top end of the shell (1), a discharging hole (7) for releasing materials in the third-level branch screen cylinder (4) is formed in the bottom end of the shell (1), every two adjacent branch screen cylinders are connected and communicated through a first conveying groove (6), and a second conveying groove (61) which is positioned above the discharging hole (7) and communicated with the discharging hole (7) is formed below the third-level screen cylinder (4), the shell (1) is provided with a driving mechanism for driving the three sub-screen cylinders to rotate simultaneously, the inside of each sub-screen cylinder is provided with a partition plate (8) which is positioned on the diameter of the sub-screen cylinder and divides the inside of the sub-screen cylinder into two independent chambers, each sub-screen cylinder is provided with strip material openings (9) which are symmetrical about the partition plate (8) and aligned with the middle part of the partition plate, and each strip material opening (9) can be communicated with a material conveying groove under the rotation of the sub-screen cylinder, and the top of the upper and lower both ends of every defeated silo (6), defeated silo two (61) all laminates with corresponding branch screen drum outer wall, every two hinged doors (10) of opening are all installed to the inboard of bar material mouth (9), every defeated silo one (6) is equipped with respectively in the top of the bottom of both ends, feed inlet (5) about, defeated silo two (61) and is carried out sealed mechanism of opening to its opening tip.

2. The tea impurity removing device according to claim 1, wherein guide plates (62) which can guide waste materials discharged from corresponding sieve holes (11) and are obliquely arranged are formed on two sides of each of the first material conveying groove (6) and the second material conveying groove (61), the guide plates (62) are fixedly connected with the inner wall of the shell (1), discharge ports (14) which correspond to the guide plates (62) one by one and can convey the waste materials on the lower end of the guide plates (62) are formed in the two side walls of the left side wall and the right side wall of the shell (1), sealing doors (15) are installed on each discharge port (14), each material conveying groove is erected inside the shell (1) through the guide plates (62), and a sealing ring (24) which is tightly attached to the inner wall of the shell (1) is adhered to the side wall of each cylindrical surface of the screen.

3. A tea leaf impurity removing device according to claim 1, wherein the driving mechanism comprises a first rotating shaft (16) fixedly arranged on one of the sub-sieve cylinders and penetrating through the shell (1), the free end of the first rotating shaft (16) is connected with a motor (17) arranged on the outer wall of the shell (1), and the three sub-sieve cylinders are connected through a transmission mechanism.

4. A tea leaf impurity removing device according to claim 3, wherein the transmission mechanism comprises a second rotating shaft (18) fixedly arranged on the outer wall of the three screening barrels and arranged at the same side, and chain wheels (19) respectively fixedly sleeved on each second rotating shaft (18) and vertically aligned, the three chain wheels (19) are connected through a chain (20), the second rotating shaft (18) is arranged back to the first rotating shaft (16), the second rotating shaft (18) penetrates through the casing (1), and the chain wheels (19) are positioned outside the casing (1).

5. A tea leaf impurity removing device according to claim 1, wherein the door opening mechanism comprises two sealing plates (12) hinged inside the material conveying groove and the material inlet (5), and limiting springs (13) with one end fixed on the inner wall of the material conveying groove and the material inlet (5) and the other end fixedly connected with the side wall of the sealing plates (12), wherein the limiting springs (13) are arranged on the sealing plates (12) at equal intervals.

6. The tea impurity removing device according to claim 1, wherein each sealing plate (12) is of an arc-shaped structure, and the outer end face of each sealing plate (12) is attached to the outer wall of the corresponding screening drum.

7. A tea leaf impurity removing device according to claim 1, wherein an auxiliary mechanism for blowing air to both sides of the dividing plate (8) is arranged in each of the sieving cylinders.

8. The tea impurity removing device according to claim 1, wherein the auxiliary mechanism comprises a gas inlet channel (21) which is arranged in a second rotating shaft (18) and is fixedly connected with the second rotating shaft (18) and a second separating screen and is communicated with the inside of the second separating screen (8), a flow dividing gas channel (22) which is arranged in the separating screen (8) at equal intervals and is perpendicular to the gas inlet channel (21), openings which are arranged at two sides of the separating screen (8) at equal intervals, and a one-way valve (23) which is arranged in each opening and is used for conveying gas to the inside of the separating screen in a one-way mode.