CN213255667U

CN213255667U - Multistage tea leaf sorting machine

Info

Publication number: CN213255667U
Application number: CN202022158216.4U
Authority: CN
Inventors: 李天德; 王丽春
Original assignee: Fujian Niannianxiang Tea Co ltd
Current assignee: Fujian Niannianxiang Tea Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-05-25
Anticipated expiration: 2030-09-27

Abstract

The application relates to a multistage tea sorting machine which comprises a case, a feed hopper arranged at the top of the case, an opening and closing device arranged at the top of the case, a screening device arranged in the case and a discharging device arranged in the case, wherein the opening and closing device is connected with the screening device; the opening and closing device is used for controlling the quantity of the tea leaves in the feeding hopper entering the case; the screening device comprises a fixed frame arranged in the case, a plurality of screening discs movably connected to the fixed frame and a reciprocating mechanism driving the screening discs to reciprocate; the mesh apertures of the plurality of screen trays from the top of the case to the bottom of the case are sequentially reduced; the discharging device is used for moving the tea leaves on the sieve tray out of the sieve tray and collecting the tea leaves. The application has the effect of being convenient for screen grading the refined tealeaves.

Description

Multistage tea leaf sorting machine

Technical Field

The application relates to the field of tea equipment, in particular to a multistage tea sorting machine.

Background

Tea refers to the leaves and buds of the tea tree, broadly to the leaves of the evergreen shrub tea tree that can be used to make tea. After the tea leaves are picked, the tea leaves are withered, fermented, de-enzymed, rolled, dried, refined and the like according to the requirements of making tea, and finally the tea leaves are made into tea products.

The tea leaves are required to be screened when being refined, the collected tea leaves are different in size and shape, the grades of the prepared products are different, when the tea is brewed, the concentration and the flavor of the leaves with different sizes are different in the speed of dissolving in boiling water, the larger the leaf is, the longer the dissolving time is, and the shorter the dissolving time is, otherwise, the leaf brewing time is.

Most of the traditional tea screening is manual screening, and because the standards grasped by manual operation are different, the screening has differences, and the screening and grading processes are troublesome and laborious.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the screening and grading of refined tea, the application provides a multistage tea sorting machine.

The application provides a multistage tea leaf picker adopts following technical scheme:

a multistage tea sorting machine comprises a case, a feed hopper arranged at the top of the case, an opening and closing device arranged at the top of the case, a screening device arranged in the case and a discharging device arranged in the case; the opening and closing device is used for controlling the quantity of the tea leaves in the feeding hopper entering the case; the screening device comprises a fixed frame arranged in the case, a plurality of screening discs movably connected to the fixed frame and a reciprocating mechanism driving the screening discs to reciprocate; the mesh apertures of the plurality of screen trays from the top of the case to the bottom of the case are sequentially reduced; the discharging device is used for moving the tea leaves on the sieve tray out of the sieve tray and collecting the tea leaves.

By adopting the technical scheme, when tea needs to be screened and classified, semi-finished tea is poured into a feed hopper, then an opening and closing device is opened, the tea in the feed hopper partially drops onto a screen plate, after the specified feeding time is reached, the opening and closing device limits the tea in the feed hopper to fall into a machine box, a reciprocating mechanism is opened, the screen plate reciprocates, the tea with different particle sizes on the screen plate is screened by screen holes on the screen plate, the tea particle sizes on the screen plate are uniform, finally a discharging device is started, the screened tea with different particle sizes is collected, the screening and classification of the tea are completed, the opening and closing device is opened after the discharging device is reset, the steps are repeated until the tea in the feed hopper is screened, on one hand, compared with manual screening, the speed of the screening device is higher, the quality of the screened tea is higher, the labor intensity of personnel is reduced, and the production efficiency is improved at the same time, on the other hand, the screening process of the tea leaves is finished in the machine case, so that the contact chance of the tea leaves with dust and water vapor is reduced, and the screened tea leaves are clean and sanitary.

Optionally, the fixing frame is composed of four fixing columns; the sieve tray is positioned among the four fixed columns; a plurality of moving rods are arranged on one side of the fixed column facing the sieve trays, and correspond to the sieve trays one by one; one side of the sieve tray facing the movable rod is provided with a sleeve coaxially sleeved on the periphery of the movable rod; the moving rod is coaxially sleeved with a compression spring; the compression spring is positioned between the sleeve and the fixed column.

Through adopting above-mentioned technical scheme, reciprocating mechanism drive sieve dish is along the axis direction reciprocating motion of carriage release lever to at the removal in-process of sieve dish, compression spring is in compression state always, reduces the effort of sleeve striking fixed column, improves the life of fixed column.

Optionally, the reciprocating mechanism includes a rack mounted on one side of the sieve tray facing the moving rod, a rotating motor mounted in the case, a rotating rod coaxially and fixedly connected to a rotating shaft of the rotating motor, and a plurality of sector gears coaxially fixed to the rotating rod; the sector gears correspond to the sieve trays one by one; the sector gear and the rack are meshed with each other.

Through adopting above-mentioned technical scheme, the start-up rotates the motor, the bull stick rotates, it is circumferential motion to drive sector gear, when sector gear and rack intermeshing, with the pulling of sieve tray toward the bull stick direction, compression spring, when sector gear breaks away from the meshing with the rack, compression spring resumes the state before the compression, with the sieve tray toward the direction top of keeping away from the bull stick, cycle and begin, realize the reciprocating motion of sieve tray, thereby filter the tealeaves on the sieve tray, through sector gear and rack, when realizing the sieve tray reciprocating motion effect with the compression spring compression, keep the stability of pulling sieve tray dynamics, in order to improve compression spring's life.

Optionally, the discharging device comprises a fixing rod mounted on the side wall of the sieve tray, a hydraulic cylinder I mounted on the bottom wall of the case, a driving rod coaxially fixed on a piston rod of the hydraulic cylinder I, a plurality of abutting plates mounted on the peripheral side of the driving rod, and a material receiving mechanism for collecting tea leaves sieved by the sieve tray; the driving rod is positioned at one side of the sieve tray, which is provided with the fixing rod; a sliding groove is formed in one side, close to the fixed rod, of the fixed column, provided with the moving rod; the moving rod is connected with the sliding groove in a sliding manner; a discharge hole is formed in one side, away from the fixed rod, of the sieve tray; the sieve tray is hinged with a material door for covering the discharge hole; the abutting plate and the fixed rod are in an abutting relationship; the receiving mechanism is positioned on one side of the discharge hole.

Through adopting above-mentioned technical scheme, start hydraulic cylinder I, the piston rod stretches out outside pneumatic cylinder I, the actuating lever removes along with the piston rod, the butt board butt is in the week side of dead lever, the piston rod lasts to stretch out, make the sieve tray towards discharge gate lopsidedness, under the effect of gravity, the bin gate that the lid fits the discharge gate is opened, the tealeaves that is located the sieve tray passes through the discharge gate, dump out outside the sieve tray, collect by receiving agencies, improve the speed of unloading tealeaves on the one hand, improve the screening efficiency, on the other hand is convenient for the orderly processing to screening back tealeaves, personnel's intensity of labour is reduced.

Optionally, the material collecting mechanism comprises a material collecting box arranged on the side wall of the case, two hydraulic cylinders II arranged on the opposite inner side walls of the material collecting box, a fixing plate fixed on a piston rod of each hydraulic cylinder II, a plurality of discharging discs obliquely fixed on the side wall of each fixing plate and a plurality of drawers connected in the material collecting box in a sliding manner; the plurality of discharging trays and the plurality of drawers are alternately distributed along the axis of the fixed column; one side of the material collecting box, which is opposite to the screen disc, is provided with a plurality of outlets which are in one-to-one correspondence with the drawers.

Through adopting above-mentioned technical scheme, start hydraulic cylinder II, the piston rod stretches out II outsides of pneumatic cylinder, and the fixed plate drives out the charging tray along with the piston rod and moves to the sieve tray direction, and tealeaves after the screening falls through the discharge gate in to the charging tray of slope to in falling to the drawer through a charging tray, last operating personnel collects the tealeaves in the drawer that will correspond through the export, just accomplish final tealeaves screening and classify.

Optionally, the opening and closing device comprises a material baffle fixed on the inner wall of the feed hopper, a rotating plate rotatably connected to the inner wall of the feed hopper, a driving motor for driving the rotating plate to rotate, and a turntable coaxially fixed on a rotating shaft of the driving motor; the baffle plate and the rotating plate are both provided with notches for tea to pass through; through holes are formed in the side wall of the feed hopper at positions corresponding to the rotating plates; the peripheral sides of the rotating discs are mutually abutted with the peripheral sides of the rotating plates through the through holes.

Through adopting the above technical scheme, open driving motor, the carousel rotates, it rotates to drive the rotor plate, breach and the relative back of breach on the striker plate of rotor plate, driving motor stall, tealeaves in the feeder hopper falls to the screen disc through the breach, reach the specified feed time after, driving motor drives the carousel and rotates again, the relative position of breach and the breach on the striker plate of rotor plate changes, tealeaves restriction in the feeder hopper is on the striker plate, the relative position of breach on breach and the striker plate through the rotor plate changes, thereby tealeaves gets into the quantity in the quick-witted case in the realization control feeder hopper, need not that operating personnel adds tealeaves to the feeder hopper at every turn ration, and then improve the efficiency of tealeaves screening.

Optionally, the driving motor is a forward and reverse rotation motor.

Through adopting above-mentioned technical scheme, reduce the rotation number of turns of rotor plate, improve the breach of rotor plate and the relative speed of breach on the striker plate, reduce simultaneously and cause the risk that tealeaves pulverizes because of the rotor plate rotates.

Optionally, the rotating plate is provided with a limiting groove; a stop block is fixed on the inner wall of the feed hopper at a position corresponding to the rotating plate; the stop block is positioned in the limit groove; when the check block is mutually abutted with the groove wall on one side of the limiting groove, tea leaves pass through the notch, otherwise, when the check block is mutually abutted with the groove wall on the other side of the limiting groove, the rotating plate limits the tea leaves to pass through the notch.

Through adopting above-mentioned technical scheme, rotate the in-process at the rotor plate, through the cooperation of dog and spacing groove, more accurately with the breach of rotor plate and the breach relative position on the striker plate confirm for tealeaves in the feeder hopper passes through the quantity of breach more, thereby reduces the feed time, and then improves the screening efficiency of tealeaves.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the screening device and the discharging device, on one hand, compared with manual screening, the screening device is higher in speed, the quality of screened tea is higher, the labor intensity of personnel is reduced, and meanwhile, the production efficiency is improved;

2. through the sector gear and the rack, the compression spring is compressed to realize the reciprocating movement effect of the sieve tray, and meanwhile, the stability of the force for pulling the sieve tray is kept, so that the service life of the compression spring is prolonged;

3. the relative position of the notch of the rotating plate and the notch of the material baffle plate is changed, so that the quantity of tea leaves entering the machine case in the feed hopper is controlled, the tea leaves are not required to be quantitatively added into the feed hopper by an operator at each time, and the tea screening efficiency is improved.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic view of the overall structure of the opening and closing device according to the embodiment of the present application.

Fig. 3 is a schematic structural diagram of the whole screening device according to the embodiment of the application.

Fig. 4 is an enlarged view of a portion a of fig. 1.

FIG. 5 is a schematic view of a discharging device according to an embodiment of the present disclosure after being started.

Description of reference numerals: 1. a chassis; 2. a feed hopper; 21. a through hole; 22. a stopper; 3. an opening and closing device; 31. a striker plate; 311. a notch; 32. a rotating plate; 321. a limiting groove; 33. a drive motor; 34. a turntable; 4. a material screening device; 41. a fixed mount; 411. fixing a column; 4111. a chute; 412. a travel bar; 4121. a compression spring; 42. a sieve tray; 421. a sleeve; 422. a discharge port; 423. a material door; 43. a reciprocating mechanism; 431. a rack; 432. rotating the motor; 433. a rotating rod; 434. a sector gear; 51. fixing the rod; 52. a hydraulic cylinder I; 53. a drive rod; 54. a butt joint plate; 55. a material receiving mechanism; 551. a material collecting box; 5511. an outlet; 552. a hydraulic cylinder II; 553. a fixing plate; 554. a discharging tray; 5541. a discharge opening; 555. a drawer.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses multistage tealeaves picker. Referring to fig. 1, a multistage tea sorter includes quick-witted case 1, be fixed in feeder hopper 2 at quick-witted case 1 top, be used for controlling in the feeder hopper 2 tealeaves get into quick-witted incasement 1 quantity open and shut device 3, be used for screening hierarchical sieve material device 4 and the discharging device who is used for collecting the tealeaves on sieve material device 4 to the tealeaves that drops to quick-witted incasement 1.

Referring to fig. 2, the opening and closing device 3 includes a baffle plate 31 fixed on the inner wall of the feeding hopper 2, a rotating plate 32 rotatably connected on the inner wall of the feeding hopper 2, a driving motor 33 for driving the rotating plate 32 to rotate, and a turntable 34 coaxially fixed on the rotating shaft of the driving motor 33, wherein gaps 311 for tea leaves to pass through are formed in both the baffle plate 31 and the rotating plate 32. The striker plate 31 and the rotating plate 32 are mutually abutted, so that the risk of crushing tea leaves caused by the rotation of the rotating plate 32 is reduced.

Referring to fig. 2, the sidewall of the hopper 2 is provided with through holes 21 at positions corresponding to the rotating plates 32. The driving motor 33 is a forward/reverse rotation motor, the circumferential side of the turntable 34 is abutted against the circumferential side of the rotating plate 32 through the through hole 21, and a rubber strip is bonded to the circumferential side of the turntable 34 to provide sufficient friction. The rotating plate 32 is provided with a limiting groove 321. The inner wall of the feeding hopper 2 is fixed with a stop 22 at a position corresponding to the rotating plate 32, and the stop 22 is positioned in the limiting groove 321. The driving motor 33 is started, the driving motor 33 drives the rotating disc 34 to rotate forward, the groove walls on one sides of the stop block 22 and the limiting groove 321 are abutted with each other, tea leaves pass through the notch 311, otherwise, the driving motor 33 drives the rotating disc 34 to rotate backward, the groove walls on the other sides of the stop block 22 and the limiting groove 321 are abutted with each other, and the rotating plate 32 limits the tea leaves to pass through the notch 311, so that the function of controlling the quantity of the tea leaves in the feeding hopper 2 entering the case 1 is realized.

Referring to fig. 1, the sieving device 4 includes a fixed frame 41 fixed in the case 1, a plurality of sieve trays 42 slidably connected to the fixed frame 41, and a reciprocating mechanism 43 for driving the sieve trays 42 to reciprocate, the sieve pore diameters of the sieve trays 42 from the top of the case 1 to the bottom of the case 1 are sequentially reduced, tea leaves falling from the feeding hopper 2 onto the sieve trays 42 reciprocating, and after being screened by the sieve trays 42, the tea leaves staying on the sieve trays 42 are tea leaves after being screened and classified.

Referring to fig. 3, the fixing frame 41 is composed of four fixing posts 411, the fixing posts 411 are rectangular, and two ends of the fixing posts 411 are respectively fixed on the bottom wall and the top wall of the inner cavity of the chassis 1. The sieve tray 42 is located between the four fixing posts 411. The fixed column 411 is provided with a plurality of moving rods 412 perpendicular to the axis of the fixed column 411 on one side facing the sieve tray 42, and the plurality of moving rods 412 correspond to the plurality of sieve trays 42 one by one. A sleeve 421 coaxially sleeved on the circumference of the moving rod 412 is fixed on one side of the sieve tray 42 facing the moving rod 412. The moving rod 412 is coaxially sleeved with a compression spring 4121, the compression spring 4121 is located between the sleeve 421 and the fixed column 411, one end of the compression spring 4121 abuts against the sleeve 421, and the other end abuts against the fixed column 411.

Referring to fig. 3 and 4, the reciprocating mechanism 43 includes a rack 431 fixed on one side of the screen tray 42 facing the movable rod 412, a rotating motor 432 fixed on the bottom wall of the inner cavity of the cabinet 1, a rotating rod 433 coaxially and fixedly connected to the rotating shaft of the rotating motor 432, and a plurality of sector gears 434 coaxially fixed on the rotating rod 433, wherein the tooth grooves on the rack 431 horizontally face the inner side wall of the cabinet 1. One end of the rotating rod 433 far away from the rotating motor 432 is rotatably connected to the top wall of the inner cavity of the case 1. The sector gears 434 correspond to the screen trays 42 one by one, and the sector gears 434 are meshed with the racks 431. The rotary motor 432 is started, the rotary rod 433 rotates to drive the sector gear 434 to move circumferentially, when the sector gear 434 is meshed with the rack 431, the sieve tray 42 is pulled towards the rotary rod 433 to compress the compression spring 4121, when the sector gear 434 is disengaged from the rack 431, the compression spring 4121 restores the state before compression, the sieve tray 42 is pushed away in the direction away from the rotary rod 433, and the reciprocating motion is repeated, so that the reciprocating motion of the sieve tray 42 is realized.

Referring to fig. 3, the discharging device includes a fixing rod 51 fixed on the side wall of the sieve tray 42, a hydraulic cylinder i 52 fixed on the bottom wall of the inner cavity of the cabinet 1, a driving rod 53 coaxially fixed on the piston rod of the hydraulic cylinder i 52, a plurality of abutting plates 54 fixed on the peripheral side of the driving rod 53, and a material receiving mechanism 55 for collecting the tea leaves sieved by the sieve tray 42, wherein the driving rod 53 is located on one side of the sieve tray 42 where the fixing rod 51 is fixed. The fixed column 411 is provided with a sliding groove 4111 near one side of the fixed rod 51, on which the moving rod 412 is arranged, and the sliding groove 4111 is an arc-shaped groove. The moving rod 412 is slidably connected to the chute 4111. The hydraulic cylinder i 52 is started, the piston rod extends out of the hydraulic cylinder i 52, the driving rod 53 moves along with the piston rod to the top direction of the machine case 1, and the abutting plate 54 abuts against the periphery of the fixing rod 51, so that the side of the sieve tray 42 departing from the fixing plate 553 inclines towards the bottom of the machine case 1.

Referring to fig. 5, a discharge hole 422 is formed in one side of the sieve tray 42 facing away from the fixing rod 51, and the sieve tray 42 is hinged with a material door 423 for covering the discharge hole 422. The receiving mechanism 55 is located at one side of the discharging port 422. Under the action of gravity, the material door 423 covering the material outlet 422 is opened when the sieve tray 42 is inclined, and the tea leaves in the sieve tray 42 are discharged out of the sieve tray 42 through the material outlet 422 and collected by the material collecting mechanism 55.

Referring to fig. 5, the receiving mechanism 55 includes a material collecting box 551 fixed on the side wall of the chassis 1 and communicated with the chassis 1, two hydraulic cylinders ii 552 fixed on the opposite inner side walls of the material collecting box 551, a fixing plate 553 fixed on the piston rods of the hydraulic cylinders ii 552, a plurality of discharging trays 554 obliquely fixed on the side walls of the fixing plate 553, and a plurality of drawers 555 slidably connected in the material collecting box 551, wherein the plurality of discharging trays 554 and the plurality of drawers 555 are alternately distributed along the axis of the fixing column 411, one end of the discharging tray 554 departing from the sieve tray 42 is a discharging opening 5541, and the discharging opening 5541 faces the plane where the bottom of the chassis 1 is. One side of the material collecting box 551, which is opposite to the sieve tray 42, is provided with a plurality of outlets 5511 which are in one-to-one correspondence with the drawers 555. Starting II 552 of hydraulic cylinder, the piston rod stretches out II 552 of hydraulic cylinder outside, fixed plate 553 drives ejection of compact dish 554 along with the piston rod and to sieve tray 42 direction removal, and the tealeaves after the screening falls in the ejection of compact dish 554 to the slope through discharge opening 5541 to accomplish the collection of hierarchical back tealeaves in the drawer 555 through ejection of compact dish 554.

The implementation principle of multistage tea picker of the embodiment of the application is: when tea leaves need to be screened and graded, firstly, semi-finished tea leaves are poured into the feeding hopper 2, the driving motor 33 is started, the driving motor 33 rotates forwards, after the notch 311 of the rotating plate 32 is opposite to the notch 311 of the material baffle plate 31, the driving motor 33 stops rotating, the tea leaves in the feeding hopper 2 fall onto the sieve tray 42 through the notch 311, after the specified feeding time is reached, the driving motor 33 rotates backwards to drive the rotating disk 34 to rotate again, the relative positions of the notch 311 of the rotating plate 32 and the notch 311 of the material baffle plate 31 are changed, and the tea leaves in the feeding hopper 2 are limited on the material baffle plate 31.

Then the rotary motor 432 is started, the compression spring 4121 is compressed through the sector gear 434 and the rack 431 to realize the reciprocating movement of the sieve tray 42, tea leaves with different particle sizes on the sieve tray 42 are screened through sieve holes on the sieve tray 42, and the tea leaves staying on the sieve tray 42 are uniform in particle size.

Then hydraulic cylinder I52 and hydraulic cylinder II 552 are started, the driving rod 53 moves along with the piston rod of hydraulic cylinder I52, the butt plate 54 abuts against the periphery of the fixed rod 51, the piston rod continuously extends out, the sieve tray 42 is inclined towards one side of the discharge port 422, the material door 423 covering the discharge port 422 is opened under the action of gravity, tea leaves in the sieve tray 42 pass through the discharge port 422, the tea leaves are dumped out of the sieve tray 42 and fall into the discharge tray 554, the tea leaves in the discharge tray 554 roll down into the corresponding drawer 555 through the discharge port 5541, the tea leaves with different particle sizes after being screened are collected, a subsequent operator pulls out the drawer 555 out of the outlet 5511 to perform the next step, and screening and grading of the tea leaves are completed.

And finally, after the specified discharging time is reached, resetting the hydraulic cylinder I52 and the hydraulic cylinder II 552, then restarting the driving motor 33, and repeating the steps until the tea leaves in the feeding hopper 2 are screened.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a multistage tea picker which characterized in that: the device comprises a case (1), a feed hopper (2) arranged at the top of the case (1), an opening and closing device (3) arranged at the top of the case (1), a screening device (4) arranged in the case (1) and a discharging device arranged in the case (1); the opening and closing device (3) is used for controlling the quantity of the tea leaves in the feed hopper (2) entering the case (1); the screening device (4) comprises a fixed frame (41) arranged in the case (1), a plurality of screening discs (42) movably connected to the fixed frame (41) and a reciprocating mechanism (43) for driving the screening discs (42) to reciprocate; the screen hole diameters of the plurality of screen discs (42) are sequentially reduced from the top of the case (1) to the bottom of the case (1); the discharging device is used for moving the tea leaves on the sieve tray (42) out of the sieve tray (42) and collecting the tea leaves.

2. The multi-stage tea picker according to claim 1, wherein: the fixed frame (41) consists of four fixed columns (411); the sieve tray (42) is positioned among the four fixed columns (411); a plurality of moving rods (412) are arranged on one side, facing the screen tray (42), of the fixed column (411), and the moving rods (412) correspond to the screen trays (42) one by one; one side of the sieve tray (42) facing the movable rod (412) is provided with a sleeve (421) which is coaxially sleeved on the peripheral side of the movable rod (412); the moving rod (412) is coaxially sleeved with a compression spring (4121); the compression spring (4121) is positioned between the sleeve (421) and the fixed column (411).

3. The multi-stage tea picker according to claim 2, wherein: the reciprocating mechanism (43) comprises a rack (431) arranged on one side of the sieve tray (42) facing the moving rod (412), a rotating motor (432) arranged in the case (1), a rotating rod (433) coaxially and fixedly connected with a rotating shaft of the rotating motor (432), and a plurality of sector gears (434) coaxially fixed on the rotating rod (433); the sector gears (434) correspond to the sieve trays (42) one by one; the sector gear (434) and the rack (431) are in a meshed relationship.

4. The multi-stage tea picker according to claim 2, wherein: the discharging device comprises a fixing rod (51) arranged on the side wall of the sieve tray (42), a hydraulic cylinder I (52) arranged on the bottom wall of the case (1), a driving rod (53) coaxially fixed on the piston rod of the hydraulic cylinder I (52), a plurality of abutting plates (54) arranged on the peripheral side of the driving rod (53) and a material receiving mechanism (55) for collecting tea leaves sieved by the sieve tray (42); the driving rod (53) is positioned at one side of the sieve tray (42) where the fixing rod (51) is installed; a sliding groove (4111) is formed in one side, close to the fixed rod (51), of the fixed column (411) and provided with the moving rod (412); the moving rod (412) is connected with the sliding groove (4111) in a sliding manner; a discharge hole (422) is formed in one side, away from the fixed rod (51), of the sieve tray (42); the sieve tray (42) is hinged with a material door (423) which covers the discharge hole (422); the abutting plate (54) and the fixed rod (51) are in an abutting relationship; the receiving mechanism (55) is positioned on one side of the discharge hole (422).

5. The multi-stage tea picker according to claim 4, wherein: the receiving mechanism (55) comprises a material collecting box (551) arranged on the side wall of the case (1), two hydraulic cylinders II (552) arranged on the opposite inner side walls of the material collecting box (551), a fixing plate (553) fixed on piston rods of the hydraulic cylinders II (552), a plurality of discharging trays (554) obliquely fixed on the side wall of the fixing plate (553) and a plurality of drawers (555) connected in the material collecting box (551) in a sliding manner; the discharging trays (554) and the drawers (555) are alternately distributed along the axis of the fixed column (411); one side of the material collecting box (551) opposite to the screen disc (42) is provided with a plurality of outlets (5511) which are in one-to-one correspondence with the drawers (555).

6. The multi-stage tea picker according to claim 1, wherein: the opening and closing device (3) comprises a material baffle plate (31) fixed on the inner wall of the feed hopper (2), a rotating plate (32) rotatably connected to the inner wall of the feed hopper (2), a driving motor (33) for driving the rotating plate (32) to rotate and a turntable (34) coaxially fixed on a rotating shaft of the driving motor (33); the material baffle plate (31) and the rotating plate (32) are both provided with notches (311) for tea to pass through; through holes (21) are formed in the side wall of the feed hopper (2) at the positions corresponding to the rotating plates (32); the peripheral side of the rotary disk (34) is abutted against the peripheral side of the rotating plate (32) through the through hole (21).

7. The multi-stage tea picker according to claim 6, wherein: the driving motor (33) is a forward and reverse rotating motor.

8. The multi-stage tea picker according to claim 7, wherein: the rotating plate (32) is provided with a limiting groove (321); a stop block (22) is fixed on the inner wall of the feed hopper (2) at a position corresponding to the rotating plate (32); the stop block (22) is positioned in the limiting groove (321); when the stop block (22) is mutually abutted with the groove wall on one side of the limiting groove (321), tea leaves pass through the notch (311), otherwise, when the stop block (22) is mutually abutted with the groove wall on the other side of the limiting groove (321), the rotating plate (32) limits the tea leaves to pass through the notch (311).