CN114682509A

CN114682509A - Seedling autofilter device

Info

Publication number: CN114682509A
Application number: CN202210433216.1A
Authority: CN
Inventors: 刘晓霞; 麻冬梅; 胡杨; 马巧利
Original assignee: Ningxia University
Current assignee: Ningxia University
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-07-01
Anticipated expiration: 2042-04-24
Also published as: CN114682509B

Abstract

The invention relates to the technical field of planting, in particular to an automatic seedling screening device which comprises a double-layer rotary seedling culturing frame; the double-layer rotary seedling raising frame comprises 2 frame-shaped track frames, a plurality of bearing plate platforms which are distributed at equal intervals along the frame-shaped path of the track frames are arranged between the 2 track frames in a sliding manner, hole trays which are distributed in a straight line are arranged on the bearing plate platforms, and one end of each bearing plate platform is connected with a chain belt conveyor; the laser height measuring instrument is positioned on one side of the track frame; the seedling clamping mechanism is positioned on one side of the track frame; the lifting mechanism is connected with the seedling clamping mechanism; the transverse displacement mechanism is connected with the lifting mechanism; the oscillating mechanism is connected with the transverse displacement mechanism; the cleaning pool is arranged below the seedling clamping mechanism, and can pull up the plants with measured heights and send the plants into the cleaning pool, and then distribute the plants with different heights to different positions, so that the automatic seedling screening is realized, the convenience and the high efficiency are realized, and the manpower consumption is reduced.

Description

Seedling autofilter device

Technical Field

The invention relates to the technical field of planting, in particular to an automatic seedling screening device.

Background

The seedling refers to a young plant which is suitable for being transplanted to other environments to grow after seeds are sown and germinate, and generally 2 pairs of true leaves are grown, and the standard is that the young plant grows to be full.

The method for screening the seedlings with the same height is the key for carrying out the next experiment, however, the existing small seedling screening method is extremely backward, manual seedling selection and cleaning are mainly carried out by means of basic judgment of people, the work is extremely labor-consuming, and based on the method, the patent provides a novel seedling selection device.

Disclosure of Invention

The invention aims to provide an automatic seedling screening device to solve the problems in the background technology.

The technical scheme of the invention is as follows: the automatic seedling screening device comprises a double-layer rotary seedling raising frame;

the double-layer rotary seedling raising frame comprises 2 frame-shaped track frames, a plurality of bearing plate platforms which are equidistantly distributed along the frame-shaped path of the track frames are arranged between the 2 track frames in a sliding manner, hole trays which are distributed in a linear arrangement are arranged on the bearing plate platforms, and one end of each bearing plate platform is connected with a chain belt conveyor;

the laser height measuring instrument is positioned on one side of the track frame;

the seedling clamping mechanism is positioned on one side of the track frame;

the lifting mechanism is connected with the seedling clamping mechanism;

the transverse displacement mechanism is connected with the lifting mechanism;

the oscillating mechanism is connected with the transverse displacement mechanism;

and the cleaning pool is arranged below the seedling clamping mechanism.

Further, be provided with the track groove of returning the style of calligraphy along the rectangle route on the track frame, and the vertical part in both sides in this track groove is two vertical retort groove structures, every one end of bearing plate platform all is provided with 2 back shafts, and 2 back shafts the structure with two vertical retort groove structure phase-matches to one of them back shaft rotates with the chain belt conveyor and is connected.

Furthermore, the bearing plate table is detachably clamped with the hole disc;

the top of bearing the weight of the pallet platform is provided with the recess of bar, the bottom both sides of cave dish are provided with curved arch respectively, and the protruding groove structure phase-match of the protruding and bearing the weight of the pallet platform of cave dish.

Furthermore, laser altimeter includes laser emitter and the laser receiver of level setting, and laser emitter and laser receiver are located respectively track frame one of them side vertical part's both sides.

Furthermore, the seedling clamping mechanism comprises 2 clamping jaws, a sliding rod penetrates through the 2 clamping jaws in a sliding manner, a return spring is sleeved outside the sliding rod, and two ends of the return spring are respectively propped against the 2 clamping jaws;

each articulated one side that 2 clamping jaws are close to mutually has a transmission arm, and the one end that the clamping jaw was kept away from to 2 transmission arms is close to each other, and the one end that the clamping jaw was kept away from to 2 transmission arms articulates there is the cross platform to each sliding connection has a second pulley in one side that 2 transmission arms were kept away from mutually, and 2 second pulleys all are connected with spacing, and one side of spacing is connected with the telescoping cylinder, and the telescoping cylinder is fixed to be set up on the cross platform.

Furthermore, one side of the clamping jaw is provided with a spring piece, one end of the spring piece is connected with the clamping jaw, and one side of the spring piece is provided with a soft rubber air bag.

Further, elevating system includes vertical slide rail, one side and the lateral displacement mechanism of vertical slide rail are connected, and the centre of vertical slide rail slides and is provided with the slide, and one side fixedly connected with horizontal platform of slide, and the opposite side of slide is provided with first pulley, and first pulley sliding connection has the guided way, and one of them section of guided way is "V" font structure.

Further, the transverse displacement mechanism comprises a vertical track bar, one end of the push-pull rod is connected with the vertical slide rail, the other end of the push-pull rod is provided with the vertical track bar, one side of the vertical track bar is movably connected with one end of the rotating arm, the other end of the rotating arm is connected with the transmission shaft, and one end of the transmission shaft is connected with the driving motor;

the upper part and the lower part of the middle part of the push-pull rod are both connected with limiting wheels, and one side of each limiting wheel is connected with a vertical frame.

Furthermore, the oscillating mechanism comprises an eccentric wheel, the middle part of the eccentric wheel is connected with a transmission shaft, one side of the driving motor is connected with a support, and the lower side of the support is connected with a base through a first spring;

a spherical hinge is arranged between the first pulley and the sliding seat, and a second spring is connected between the first pulley and the sliding seat;

the eccentric wheel and the transmission shaft and the rotating arm and the transmission shaft are connected through one-way bearings respectively, and the locking directions of the eccentric wheel and the rotating arm are opposite.

Furthermore, a classification conveyor set is arranged on one side of the cleaning pool and is positioned below the seedling clamping mechanism;

the sorting conveyor set comprises a plurality of belt conveyors distributed side by side.

The invention provides an automatic seedling screening device through improvement, and compared with the prior art, the automatic seedling screening device has the following improvements and advantages:

one is as follows: according to the invention, the upper plug tray of the double-layer rotary seedling raising frame can be used for planting, plants planted on the upper plug tray can circularly move along the frame-shaped path of the double-layer rotary seedling raising frame under the drive of the chain belt conveyor, the plants are automatically transferred to a laser height measuring instrument in batches continuously, the plant height is automatically measured, then the seedling clamping mechanism is matched and operated under the drive of the lifting mechanism, the transverse displacement mechanism and the oscillating mechanism, the plants with the measured height are firstly pulled up and then sent into the cleaning pool, and then the plants with different heights are distributed to different positions, so that the automatic seedling screening is realized, the convenience and the high efficiency are realized, and the manpower consumption is reduced;

the second step is as follows: according to the invention, the bearing plate platform can be kept horizontal when moving along the transverse part of the track frame, and can also be kept horizontal when moving along the vertical part of the track frame under the limiting action of the double-vertical-bar groove structure, so that the plug tray can be always kept horizontal and cannot topple over in the rotary conveying process; and thirdly: according to the invention, the telescopic cylinder pushes the limiting strips to enable the two second pulleys to move forwards simultaneously, so that the 2 transmission arms can be extruded to rotate to approach, and further the 2 clamping jaws are driven to slide to approach, so that the 2 clamping jaws can automatically grab seedling plants, and after the seedling plants are tightly clamped, the bearing plate platform drives the plug tray to move downwards, so that the seedling plants can be automatically pulled up, and automatic seedling lifting is realized;

fourthly, the method comprises the following steps: according to the invention, the spring piece can provide elastic support for the soft rubber air bag, the soft rubber air bag has elasticity and is softer, and the friction force when the soft rubber air bag is contacted with plant seedlings can be increased, so that the plant seedlings are safer and more stable when being pulled up;

and fifthly: according to the invention, the first pulley on one side of the sliding seat can slide along the guide rail, and when the first pulley moves to the position of the V-shaped structure, the first pulley can move downwards along the V-shaped path, so that the transverse table on one side of the sliding seat also moves downwards, the descending is realized, the seedling clamping mechanism can drive the clamped plant seedlings to automatically move into the cleaning pool, and the automatic cleaning is convenient;

and the sixth step: according to the invention, the transverse displacement mechanism, the lifting mechanism, the seedling clamping mechanism and the oscillating mechanism are supported by the first spring and the second spring, when the driving motor drives the eccentric wheel to eccentrically rotate, vibration can be generated, and then the vibration is transmitted to the seedling clamping mechanism through the transverse displacement mechanism and the lifting mechanism, so that the clamped plant seedlings can self-vibrate, vibration cleaning can be formed, and cleaning of soil on the root systems of the seedlings is accelerated.

Drawings

The invention is further explained below with reference to the figures and examples:

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

FIG. 2 is a top view of the present invention;

FIG. 3 is a front view of the seedling clamping mechanism of the present invention;

FIG. 4 is a top view of the seedling clamping mechanism of the present invention;

FIG. 5 is a side view of the lift mechanism of the present invention;

FIG. 6 is a front view of the guide rail of the present invention;

FIG. 7 is a top view of the eccentric and rotating arm of the present invention;

FIG. 8 is a front view of the eccentric of the present invention;

FIG. 9 is a top view of the cleaning tank of the present invention;

FIG. 10 is a top plan view of the sortation conveyor assembly of the present invention;

FIG. 11 is a cross-sectional view of a load-bearing pallet of the present invention.

Description of reference numerals:

1. a plug;

2. double-layer rotary seedling raising frames; 21. a load-bearing pallet; 22. a support shaft; 23. a rail frame; 24. a chain conveyor;

3. a laser height measuring instrument; 31. a laser transmitter; 32. a laser receiver;

4. a lateral displacement mechanism; 41. a vertical track bar; 42. a rotating arm; 43. a support; 44. a push-pull rod; 45. erecting a frame; 46. a limiting wheel; 47. a drive shaft; 48. a drive motor;

5. an oscillating mechanism; 51. a base; 52. a first spring; 53. an eccentric wheel; 54. a one-way bearing;

6. a lifting mechanism; 61. a vertical slide rail; 62. a slide base; 63. a transverse table; 64. a first pulley; 65. a second spring; 66. a guide rail;

7. a seedling clamping mechanism; 71. a clamping jaw; 72. a telescopic cylinder; 73. a limiting strip; 74. a second pulley; 75. a drive arm; 76. a slide bar; 77. a return spring; 78. a spring plate; 79. a soft rubber air bag;

8. a classification conveyor set;

9. and (5) cleaning the pool.

Detailed Description

The present invention is described in detail below, and technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides an automatic seedling screening device through improvement, as shown in figures 1-11, the automatic seedling screening device comprises a double-layer rotary seedling raising frame 2;

the double-layer rotary seedling raising frame 2 comprises 2 frame-shaped track frames 23, a plurality of bearing plate platforms 21 which are equidistantly distributed along the frame-shaped path of the track frames 23 are arranged between the 2 track frames 23 in a sliding manner, hole trays 1 which are distributed in a straight line are arranged on the bearing plate platforms 21, and one end of each bearing plate platform 21 is connected with a chain belt conveyor 24;

the laser height measuring instrument 3 is positioned on one side of the track frame 23;

the seedling clamping mechanism 7 is positioned on one side of the track frame 23;

the lifting mechanism 6 is connected with the seedling clamping mechanism 7;

the transverse displacement mechanism 4 is connected with the lifting mechanism 6;

the oscillating mechanism 5 is connected with the transverse displacement mechanism 4;

and the cleaning pool 9 is arranged below the seedling clamping mechanism 7.

The last cave dish 1 of double-deck gyration nursery cabinet 2 can be used for planting, under the drive of chain belt conveyor 24, the plant of planting on it can be along the frame shape route circulatory movement of double-deck gyration nursery cabinet 2, automatic with the continuous batch transfer to laser height measuring instrument 3 department of plant, automatic measurement plant height, then press from both sides seedling mechanism 7 at elevating system 6, horizontal displacement mechanism 4 and oscillation mechanism 5 drive down the cooperation function, send into washing pond 9 after pulling up the plant that is surveyed the height earlier, distribute the plant of co-altitude not to different positions again, realize the autofilter seedling, and is convenient and efficient, and the manpower consumption is reduced.

A back-shaped track groove is arranged on the track frame 23 along a rectangular path, the vertical parts on two sides of the track groove are of a double-vertical-strip-groove structure, 2 support shafts 22 are arranged at each end of the bearing pallet 21, the structure of each support shaft 22 is matched with the structure of the double-vertical-strip-groove structure, one support shaft 22 is rotatably connected with the chain belt conveyor 24, and the chain belt body of the chain belt conveyor 24 is rotatably connected with the support shaft 22; the bearing plate table 21 can be kept horizontal when moving along the transverse part of the track frame 23, and can also be kept horizontal when moving along the vertical part of the track frame 23 under the limiting effect of the double-vertical-bar groove structure, so that the plug tray 1 can be always kept horizontal in the rotary conveying process and cannot topple over.

The bearing plate table 21 is detachably clamped with the plug tray 1;

the top of the bearing plate table 21 is provided with a strip-shaped groove, two sides of the bottom of the plug 1 are respectively provided with an arc-shaped bulge, and the bulges of the plug 1 are matched with the groove structure of the bearing plate table 21; the plug tray 1 can be conveniently fixed on the bearing plate table 21, and can be conveniently detached from the bearing plate table 21, so that the plug tray is convenient to clean and replace.

The laser height measuring instrument 3 comprises a laser transmitter 31 and a laser receiver 32 which are horizontally arranged, wherein the laser transmitter 31 and the laser receiver 32 are respectively positioned on two sides of the vertical part on one side of the track frame 23; in a normal state, the laser receiver 32 can receive the laser emitted by the laser emitter 31, when the seedling in the plug tray 1 vertically moves from top to bottom to a position between the laser emitter 31 and the laser receiver 32 along with the bearing plate table 21, the laser emitted by the laser emitter 31 can be blocked, the laser receiver 32 cannot receive the laser, it can be determined that the seedling moves to a position between the laser emitter 31 and the laser receiver 32, the starting time when the laser receiver 32 cannot receive the laser is recorded, along with the movement of the bearing plate table 21, after the seedling and the plug tray 1 move away from the position between the laser emitter 31 and the laser receiver 32, the laser is not blocked, the laser receiver 32 can continue to receive the laser, the time when the laser receiver 32 restarts to receive the laser is recorded, and the interval between the time and the starting time is multiplied by the moving speed of the bearing plate table 21, so that the height of the seedling plant can be obtained.

The seedling clamping mechanism 7 comprises 2 clamping jaws 71, a sliding rod 76 penetrates through the 2 clamping jaws 71 in a sliding mode, a return spring 77 is sleeved outside the sliding rod 76, and two ends of the return spring 77 are respectively propped against the 2 clamping jaws 71;

one side, close to each other, of each of the 2 clamping jaws 71 is hinged with a transmission arm 75, one ends, far away from the clamping jaws 71, of the 2 transmission arms 75 are close to each other, one ends, far away from the clamping jaws 71, of the 2 transmission arms 75 are hinged with a transverse table 63, one side, far away from each of the 2 transmission arms 75, is connected with a second pulley 74 in a sliding mode, each of the 2 second pulleys 74 is connected with a limiting strip 73, one side of each limiting strip 73 is connected with a telescopic cylinder 72, the telescopic cylinders 72 are fixedly arranged on the transverse table 63, and the telescopic cylinders 72 can be electric cylinders, air cylinders or push-pull electromagnets; the telescoping cylinder 72 lets two second pulleys 74 antedisplacement simultaneously through promoting spacing 73 for 2 driving arms 75 can be pushed and rotate and be close to, and then drive 2 clamping jaws 71 and slide and be close to, make 2 clamping jaws 71 can snatch the seedling plant automatically, the seedling plant is by grasping the back, bearing plate platform 21 drives plug 1 and moves down, make the seedling plant can be pulled up by automatic, realize automatic seedling raising, retract back when the telescoping cylinder 72, 2 clamping jaws 71 can be automatic under return spring 77's elasticity top pushing effect separately.

A spring leaf 78 is arranged on one side of the clamping jaw 71, one end of the spring leaf 78 is connected with the clamping jaw 71, and a soft rubber air bag 79 is arranged on one side of the spring leaf 78; spring leaf 78 can provide elastic support for flexible glue gasbag 79, and flexible glue gasbag 79 itself has elasticity, and is softer, and frictional force when can increase and plant seedling contact lets the plant seedling by the time of pulling out safety and stability more.

The lifting mechanism 6 comprises a vertical slide rail 61, one side of the vertical slide rail 61 is connected with the transverse displacement mechanism 4, a slide seat 62 is arranged in the middle of the vertical slide rail 61 in a sliding manner, one side of the slide seat 62 is fixedly connected with a transverse table 63, the other side of the slide seat 62 is provided with a first pulley 64, the first pulley 64 is connected with a guide rail 66 in a sliding manner, and one section of the guide rail 66 is of a V-shaped structure; the first pulley 64 on one side of the sliding base 62 can slide along the guide rail 66, and when the first pulley 64 moves to the position of the V-shaped structure, the first pulley can move downwards along the V-shaped path, so that the cross platform 63 on one side of the sliding base 62 also moves downwards to realize descending, and the seedling clamping mechanism 7 can drive the clamped plant seedlings to automatically move into the cleaning pool 9, thereby facilitating automatic cleaning.

The transverse displacement mechanism 4 comprises a vertical track bar 41, one end of a push-pull rod 44 is connected with a vertical sliding rail 61, the other end of the push-pull rod 44 is provided with the vertical track bar 41, one side of the vertical track bar 41 is movably connected with one end of a rotating arm 42, the rotating arm 42 is connected with the vertical track bar 41 in a sliding connection or a rotating connection, the other end of the rotating arm 42 is connected with a transmission shaft 47, and one end of the transmission shaft 47 is connected with a driving motor 48;

the upper part and the lower part of the middle part of the push-pull rod 44 are both connected with a limiting wheel 46, and one side of the limiting wheel 46 is connected with a vertical frame 45; the driving motor 48 drives the rotating arm 42 to rotate in a single direction through the transmission shaft 47, and can horizontally push the vertical track bar 41 in a reciprocating manner, so that the push-pull rod 44 can perform push-pull action to drive the seedling clamping mechanism 7 to automatically move in and out of the double-layer rotary seedling raising frame 2;

the rotation angle of the drive motor 48 is controlled by a controller, and the advancing distance is controlled by controlling the rotation angle.

The oscillating mechanism 5 comprises an eccentric wheel 53, the middle part of the eccentric wheel 53 is connected with the transmission shaft 47, one side of the driving motor 48 is connected with a support 43, and the lower side of the support 43 is connected with a base 51 through a first spring 52;

a spherical hinge is arranged between the first pulley 64 and the sliding seat 62, and a second spring 65 is connected between the first pulley 64 and the sliding seat 62;

the eccentric wheel 53 and the transmission shaft 47 and the rotating arm 42 and the transmission shaft 47 are respectively connected through a one-way bearing 54, the locking directions of the eccentric wheel 53 and the rotating arm 42 are opposite, and the one-way bearing 54 is specifically a one-way ratchet bearing; the transverse displacement mechanism 4, the lifting mechanism 6, the seedling clamping mechanism 7 and the oscillating mechanism 5 are supported by a first spring 52 and a second spring 65, when the driving motor 48 drives the eccentric wheel 53 to eccentrically rotate, vibration can be generated, and then the vibration is transmitted to the seedling clamping mechanism 7 through the transverse displacement mechanism 4 and the lifting mechanism 6, so that the clamped plant seedlings can self-vibrate, the vibration effect is performed when the plant seedlings move into the cleaning pool 9, vibration cleaning can be formed, and the cleaning of soil on the root systems of the seedlings is accelerated;

under the transmission effect of the one-way bearing 54, when the transmission shaft 47 rotates in one direction, the rotating arm 42 can be driven to rotate, the eccentric wheel 53 cannot be driven to rotate, and when the transmission shaft 47 rotates in the other direction, the eccentric wheel 53 can be driven to rotate, the rotating arm 42 cannot be driven, so that the transverse movement can be stopped temporarily for vibration cleaning.

A classification conveyor unit 8 is arranged on one side of the cleaning pool 9, and the classification conveyor unit 8 is positioned below the seedling clamping mechanism 7;

the sorting conveyor unit 8 comprises a plurality of belt conveyors distributed side by side; according to the height of the seedling plant measured by the laser height measuring instrument 3, the transverse displacement mechanism 4 drives the seedling clamping mechanism 7 to move to the upper positions of different belt conveyors, so that the seedling plants with different heights can be distributed to different belt conveyors, and the screened seedling can be automatically sent out.

The working principle is as follows: seeds can be planted in the plug tray 1, the upper layer, the lower layer, the left side and the right side of the double-layer rotary seedling raising frame 2 can be planted, a frame-shaped planting ring is formed, and space is efficiently utilized;

when the screening is started, the chain belt conveyor 24 rotates at a constant speed to drive the bearing plate table 21, the plug tray 1 and the seedlings to move along the track frame 23 in a rectangular frame-shaped path, and when the seedlings in the plug tray 1 vertically move between the laser emitter 31 and the laser receiver 32 from top to bottom along with the bearing plate table 21, the height of the seedlings can be automatically calculated;

then, the seedling plants continue to move to the height of the seedling clamping mechanism 7, the driving motor 48 drives the rotating arm 42 to rotate in a single direction through the transmission shaft 47, and the vertical track bar 41 can be pushed to and fro transversely, so that the push-pull rod 44 can perform push-pull action and drive the seedling clamping mechanism 7 to automatically move in and out of the double-layer rotary seedling raising frame 2;

after the clamping jaws 71 of the seedling clamping mechanism 7 extend to the seedling planting positions on the plug tray 1, the telescopic cylinder 72 pushes the limiting strips 73 to enable the two second pulleys 74 to move forwards simultaneously, so that the 2 transmission arms 75 can be extruded to rotate to approach, and further the 2 clamping jaws 71 are driven to slide to approach, so that the 2 clamping jaws 71 can automatically grab seedling plants, and after the seedling plants are tightly grasped, the bearing plate table 21 drives the plug tray 1 to move downwards, so that the seedling plants can be automatically pulled up, and automatic seedling lifting is realized;

then, the transverse displacement mechanism 4 pulls the seedling clamping mechanism 7 to move away from the position of the plug tray 1, under the action of the guide rail 66, the first pulley 64 on one side of the slide base 62 can slide along the guide rail 66, and when the first pulley 64 moves to the position of the V-shaped structure of the guide rail 66, the first pulley can move downwards along the V-shaped path, so that the transverse table 63 on one side of the slide base 62 also moves downwards to realize descending, and the seedling clamping mechanism 7 can automatically displace the clamped plant seedlings into the cleaning pool 9;

the transverse displacement mechanism 4, the lifting mechanism 6, the seedling clamping mechanism 7 and the oscillating mechanism 5 are supported by a first spring 52 and a second spring 65, when the driving motor 48 drives the eccentric wheel 53 to eccentrically rotate, vibration can be generated, and then the vibration is transmitted to the seedling clamping mechanism 7 through the transverse displacement mechanism 4 and the lifting mechanism 6, so that the clamped plant seedlings can self-vibrate, vibration cleaning is formed, and cleaning of soil on the root systems of the seedlings is accelerated;

finally, according to the height of the seedling plant measured by the laser height measuring instrument 3, the transverse displacement mechanism 4 drives the seedling clamping mechanism 7 to move to the upper positions of different belt conveyors, so that the seedling plants with different heights can be distributed to different belt conveyors, and the screened seedling can be automatically sent out.

Claims

1. Seedling autofilter device, its characterized in that: comprises a double-layer rotary seedling raising frame (2);

the double-layer rotary seedling raising frame (2) comprises 2 frame-shaped track frames (23), a plurality of bearing pallet tables (21) which are equidistantly distributed along the frame-shaped path of the track frames (23) are arranged between the 2 track frames (23) in a sliding manner, hole trays (1) which are distributed in a straight line are arranged on the bearing pallet tables (21), and one end of each bearing pallet table (21) is connected with a chain belt conveyor (24);

the laser height measuring instrument (3), the laser height measuring instrument (3) is positioned on one side of the track frame (23);

the seedling clamping mechanism (7), the seedling clamping mechanism (7) is positioned on one side of the track frame (23);

the lifting mechanism (6), the lifting mechanism (6) is connected with the seedling clamping mechanism (7);

the transverse displacement mechanism (4), the transverse displacement mechanism (4) is connected with the lifting mechanism (6);

the oscillating mechanism (5), the oscillating mechanism (5) is connected with the transverse displacement mechanism (4);

and the cleaning pool (9) is arranged below the seedling clamping mechanism (7).

2. The automatic seedling screening device of claim 1, wherein: the track frame (23) is provided with the track groove of returning the type along the rectangle route, and the vertical part in both sides in this track groove is two vertical retort groove structures, every one end of bearing plate platform (21) all is provided with 2 back shafts (22), and 2 back shafts (22) the structure with two vertical retort groove structure phase-matches to one of them back shaft (22) rotate with chain belt conveyor (24) and be connected.

3. The automatic seedling screening device of claim 1, wherein: the bearing plate table (21) is detachably clamped with the plug tray (1);

the top of bearing pallet (21) is provided with the recess of bar, the bottom both sides of cave dish (1) are provided with curved arch respectively, and the protruding groove structure phase-match that bears pallet (21) of cave dish (1).

4. A seedling automatic screening device according to claim 1, characterized in that: the laser height measuring instrument (3) comprises a laser transmitter (31) and a laser receiver (32) which are horizontally arranged, and the laser transmitter (31) and the laser receiver (32) are respectively positioned on two sides of the vertical part on one side of the track frame (23).

5. The automatic seedling screening device of claim 1, wherein: the seedling clamping mechanism (7) comprises 2 clamping jaws (71), a sliding rod (76) penetrates through the 2 clamping jaws (71) in a sliding mode, a return spring (77) is sleeved outside the sliding rod (76), and two ends of the return spring (77) are respectively propped against the 2 clamping jaws (71);

one side that 2 clamping jaw (71) are close to mutually respectively articulates there is a transmission arm (75), the one end that clamping jaw (71) were kept away from in 2 transmission arms (75) is close to each other, and the one end that clamping jaw (71) were kept away from in 2 transmission arms (75) articulates there is horizontal platform (63), and each sliding connection has a second pulley (74) in one side that 2 transmission arms (75) were kept away from mutually, 2 second pulleys (74) all are connected with spacing (73), one side of spacing (73) is connected with telescoping cylinder (72), telescoping cylinder (72) are fixed to be set up on horizontal platform (63).

6. A seedling automatic screening device according to claim 5, characterized in that: a spring plate (78) is arranged on one side of the clamping jaw (71), one end of the spring plate (78) is connected with the clamping jaw (71), and a soft rubber air bag (79) is arranged on one side of the spring plate (78).

7. A seedling automatic screening device according to claim 5, characterized in that: elevating system (6) include vertical slide rail (61), one side and horizontal displacement mechanism (4) of vertical slide rail (61) are connected, and the centre of vertical slide rail (61) slides and is provided with slide (62), and one side fixedly connected with horizontal platform (63) of slide (62), and the opposite side of slide (62) is provided with first pulley (64), and first pulley (64) sliding connection has guided way (66), and one of them section of guided way (66) is "V" font structure.

8. A seedling autofilter apparatus according to claim 7, characterized in that: the transverse displacement mechanism (4) comprises a vertical track bar (41), one end of a push-pull rod (44) is connected with a vertical sliding rail (61), the other end of the push-pull rod (44) is provided with the vertical track bar (41), one side of the vertical track bar (41) is movably connected with one end of a rotating arm (42), the other end of the rotating arm (42) is connected with a transmission shaft (47), and one end of the transmission shaft (47) is connected with a driving motor (48);

the middle part of the push-pull rod (44) is connected with a limiting wheel (46) up and down, and one side of the limiting wheel (46) is connected with a vertical frame (45).

9. The automatic seedling screening device of claim 8, wherein: the oscillating mechanism (5) comprises an eccentric wheel (53), the middle part of the eccentric wheel (53) is connected with a transmission shaft (47), one side of the driving motor (48) is connected with a support (43), and the lower side of the support (43) is connected with a base (51) through a first spring (52);

a spherical hinge is arranged between the first pulley (64) and the sliding seat (62), and a second spring (65) is connected between the first pulley (64) and the sliding seat (62);

the eccentric wheel (53) and the transmission shaft (47) as well as the rotating arm (42) and the transmission shaft (47) are respectively connected through a one-way bearing (54), and the locking directions of the eccentric wheel (53) and the rotating arm (42) are opposite.

10. The automatic seedling screening device of claim 1, wherein: a classification conveyor set (8) is arranged on one side of the cleaning pool (9), and the classification conveyor set (8) is positioned below the seedling clamping mechanism (7);

the sorting conveyor set (8) comprises a plurality of belt conveyors distributed side by side.