Precision seeder with integrated mulching function

Abstract

The present invention discloses a precision seeder with integrated film covering function, which comprises a frame, on which a soil collecting mechanism, a film covering mechanism and a sowing mechanism arranged front and back are installed; the soil collecting mechanism is connected to a soil conveying mechanism, and the soil conveying mechanism comprises a main conveying channel and a diverging structure arranged at the rear side of the main conveying channel; the soil collecting mechanism comprises a first augers and a second augers arranged front and back; three groups of sowing mechanisms distributed left and right are installed on the frame; the diverging structure comprises a soil throwing pipeline from the main conveying channel to the front side of each sowing mechanism, and also comprises a soil throwing guide groove from the main conveying channel to the rear side of the sowing mechanism; the number of the soil throwing guide grooves is two, which comprises a main groove passing through two adjacent sowing mechanisms and two bifurcated grooves located at the rear side of the main groove. The present invention can ensure the quality of film covering and sowing.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural seeding machinery, and in particular to a precision seeding machine with integrated film covering function. Background Art

[0002] In the process of planting precision-seeded crops such as cotton, corn, soybeans, sorghum, and edible beans in arid areas, it is necessary to accurately sow seeds and cover the ground with film. Currently, in actual implementation, covering and sowing are usually carried out separately using two machines, which greatly reduces work efficiency.

[0003] In the prior art, patent CN108684239A discloses a typical cotton seeder, which includes a rotary tillage mechanism, a shock-pressing mechanism, a covering roller and a spot seeder; the shock-pressing mechanism includes a shock-pressing roller suspended by a shock-pressing roller suspension frame, a belt reel is arranged above the shock-pressing mechanism, the drip irrigation belt is led out from the belt reel and spread on the ground through the shock-pressing roller; a film laying mechanism is arranged between the shock-pressing mechanism and the covering roller, the film laying mechanism includes a ground film reel, and a ground film spreading roller suspended by a film spreading suspension frame, and a film edge sealing disc is installed behind the ground film spreading roller; the covering roller is directly fixed to the rear part of the frame as a rear fulcrum of the frame, and soil taking plates are arranged on both sides of the covering roller. In this patent, soil is covered on both sides of the film by means of film edge sealing discs, but the covering effect is poor. After the seeding device pierces the film for sowing, the sowing point and the pierced hole are easily misaligned, and it is only suitable for low-speed operation (2-4km / h). When the operating speed is increased, soil splashing occurs, the hole position deviates greatly, the operation quality is worse, and the air permeability and seed germination are seriously affected.

[0004] Patent CN218977533U discloses a film covering mechanism, which includes a side-throwing soil taking mechanism, a soil diversion and conveying mechanism, and a soil dividing funnel. This structure can take soil in front of the sowing mechanism and convey it to the rear to suppress the film. Although the covering effect is improved, it still cannot guarantee the quality of soil covering at increased speed and the alignment of the seed sowing point with the punctured hole. Summary of the invention

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a precision seeder with integrated mulching function that can ensure the quality of sowing and mulching.

[0006] Technical solution: To achieve the above-mentioned purpose, the precision seeder with integrated film covering function of the present invention comprises a frame, on which a soil collecting mechanism, a film covering mechanism and a seeding mechanism arranged front and back are installed; the soil collected by the soil collecting mechanism can be transported to the rear of the film covering mechanism; the soil collecting mechanism is connected to a soil conveying mechanism, and the soil conveying mechanism comprises a main conveying channel and a branching structure arranged at the rear of the main conveying channel;

[0007] The soil collecting mechanism comprises a first auger and a second auger arranged in front and back;

[0008] The frame is provided with three groups of sowing mechanisms distributed on the left and right; the branch structure includes a soil throwing pipe from the main conveying channel to the front side of each sowing mechanism, and also includes a soil throwing guide groove from the main conveying channel to the rear side of the sowing mechanism;

[0009] There are two soil-throwing guide grooves, which include a main groove passing through two adjacent sowing mechanisms and two bifurcated grooves located at the rear side of the main groove. The main groove and the two bifurcated grooves form a Y-shaped structure; the two bifurcated grooves respectively lead to the rear sides of the two adjacent sowing mechanisms.

[0010] Furthermore, the sowing mechanism includes a rolling frame and a plurality of duckbill mechanisms arranged in a circular array on the rolling frame, and also includes a seed box; the sowing mechanism also includes an air-suction precision seed metering device placed at the inner center of the rolling frame, and the shell of the air-suction precision seed metering device has a seed inlet and a seed outlet; the seed box is connected to the seed inlet, and a seed wheel is provided in the shell, and the seed wheel has suction holes arranged in a circular array, and the shell is connected to an air pipe capable of generating a pressure difference on both sides of the suction hole;

[0011] The duckbill mechanism comprises a receiving bucket and a duckbill portion located below the receiving bucket, and the duckbill portion is driven by an opening and closing driving mechanism to perform opening and closing movements.

[0012] Furthermore, two groups of duckbill mechanisms arranged in a circular array are installed on the rolling frame; and the air-suction precision seed metering device has two seeding wheels.

[0013] Furthermore, the soil conveying mechanism also includes a conveyor belt placed at the bottom of the main conveying channel, and the conveyor belt has a V-shaped protrusion.

[0014] Furthermore, the laminating mechanism includes a fixed frame fixed on the frame, on which a film roll and a film pressing roller are installed, and the film pressing roller is connected to the fixed frame via a first push rod and a pressure sensor; the film roll is driven by a motor to rotate relative to the fixed frame; the film released by the film roll is laid on the ground after passing through the film pressing roller.

[0015] Furthermore, the number of the first push rods is two, and the two push rods are respectively connected to two ends of the lamination roller.

[0016] Furthermore, a detection sensor for detecting the film is installed at the lower end of each first push rod, and a correction mechanism is also included. The control system can control the correction mechanism to correct the film based on data collected by the detection sensor.

[0017] Furthermore, a soil distribution mechanism is installed on the rear side of the conveyor belt.

[0018] Furthermore, the soil distribution mechanism includes a transition plate erected between the rear end of the conveyor belt and the branch structure, and also includes a movable plate that can slide left and right relative to the transition plate; a plurality of first soil leakage holes are formed on the transition plate, and a first side of each of the first soil leakage holes has a first retaining edge; a number of second soil leakage holes equal to the number of the first soil leakage holes are formed on the movable plate, and a second side of each of the second soil leakage holes has a second retaining edge.

[0019] Beneficial effects: The precision seeder with integrated film covering function of the present invention has the following beneficial effects:

[0020] (1) The soil collecting mechanism adopts a double auger structure, which can fully gather the soil to the middle and at the same time play the role of leveling the soil to ensure the subsequent covering effect.

[0021] (2) The diverging structure at the rear side of the soil conveying mechanism can effectively distribute the soil conveyed from the main conveying channel to the front and rear sides of each sowing mechanism, avoiding the soil splashing caused by the traditional soil covering mechanism, and the soil conveyed to the front side of the sowing mechanism can timely suppress and fix the film laid by the film covering mechanism to prevent the film from being blown off or bulging by strong winds. After the sowing mechanism punctures the film for sowing, the film will not shift, which can prevent the holes on the film from being misaligned with the seed sowing position, affecting the subsequent seed germination. The soil conveyed to the rear side of the sowing mechanism can cover the holes opened by the duckbill mechanism to prevent the seeds from being exposed and affecting the germination rate.

[0022] (3) By integrating the air-suction precision seed meter into the rolling frame, the sowing mechanism combines the advantages of the traditional pneumatic seed meter and the traditional duck-bill sowing mechanism. On the one hand, the air-suction precision seed meter can accurately discharge the seeds. On the other hand, the duck-bill mechanism can pierce the film and sow the seeds to a certain depth to ensure the germination rate, without the need to set up a separate furrowing mechanism.

[0023] (4) The control system can monitor the reaction force of the film on the laminating roller through the pressure sensor. When the reaction force is too large, the first push rod contracts and the motor speed increases; when the reaction force is too small, the first push rod extends and the motor speed decreases. In this way, the film can be tightened at an appropriate force to ensure the lamination quality while preventing the film from being broken.

[0024] (5) Based on the detection sensor and the correction mechanism, the film can be dynamically corrected to ensure the quality of the coating.

[0025] (6) This machine can be used for the planting needs of precision-seeded crops such as cotton, corn, soybeans, and sorghum. It can complete the film-covering and sowing operation in one go, and the operating speed can be increased to more than 5 km / h. It has the advantages of high efficiency, high sowing accuracy, and good film-covering quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a cross-sectional structural diagram of a precision seeder;

[0027] Figure 2 It is a first three-dimensional structural diagram of a precision seeder;

[0028] Figure 3 is a second three-dimensional structural diagram of the precision seeder;

[0029] Figure 4 This is the structural diagram of the seeding mechanism;

[0030] Figure 5 This is a structural diagram of an air-suction precision seed metering device;

[0031] Figure 6 It is the structural diagram of the soil collection mechanism;

[0032] Figure 7 This is the structural diagram of the soil conveying mechanism;

[0033] Figure 8 It is a structural diagram of the laminating mechanism;

[0034] Fig. 9 for Figure 8 The enlarged structure diagram of part A in the middle;

[0035] Fig.10 The internal structure diagram of the roller body;

[0036] Fig.11 It is a cross-sectional structural diagram of the roller body;

[0037] Fig.12 Structural diagram of the soil distribution mechanism.

[0038] In the figure: 1-frame; 2-soil collecting mechanism; 21-first auger; 22-second auger; 3-film coating mechanism; 31-fixed frame; 32-film reel; 33-film pressing roller; 33a-roller body; 331-roller shaft; 332-fixed end plate; 333-movable end plate; 334-metal strip; 335-colloidal skin; 336-connecting part; 34-first push rod; 35-pressure sensor; 36-motor; 37-detection sensor; 38-correction mechanism; 381-pull rod; 382-second push rod; 383-disc; 4-seeding mechanism; 41-rolling frame; 42-duck Mouth mechanism; 421-receiving bucket; 422-duckbill; 423-opening and closing driving mechanism; 43-seed box; 44-air suction precision seeding device; 441-seed inlet; 442-seed outlet; 443-seed wheel; 5-soil conveying mechanism; 51-main conveying channel; 52-soil throwing pipeline; 53-soil throwing guide groove; 53a-main groove; 53b-forked groove; 54-conveyor belt; 55-raised part; 5A-soil distribution mechanism; 56-transition plate; 56a-first soil leakage hole; 56b-first retaining edge; 57-movable plate; 57a-second soil leakage hole; 57b-second retaining edge. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] like Figure 1-3 The precision seeder with integrated film covering function shown includes a frame 1 on which are mounted a soil collecting mechanism 2, a film covering mechanism 3 and a seeding mechanism 4 arranged in a front-to-back manner; the soil gathered by the soil collecting mechanism 2 can be transported to the rear of the film covering mechanism 3.

[0041] like Figure 4 As shown, the sowing mechanism 4 includes a rolling frame 41 and a plurality of duckbill mechanisms 42 arranged in a circular array on the rolling frame 41, and also includes a seed box 43; the sowing mechanism 4 also includes an air suction type precision seed metering device 44 placed at the inner center position of the rolling frame 41, and the shell of the air suction type precision seed metering device 44 has a seed inlet 441 and a seed outlet 442; the seed box 43 is connected to the seed inlet 441, as shown in FIG. Figure 5 As shown, the shell has a seeding wheel 443, and the seeding wheel 443 has suction holes arranged in a circumferential array. The shell is connected to an air pipe that can generate a pressure difference on both sides of the suction hole. The specific structure of other air-suction precision seeding devices 44 can refer to the prior art and will not be described in detail here.

[0042] The duckbill mechanism 42 comprises a receiving bucket 421 and a duckbill portion 422 located below the receiving bucket 421 . The duckbill portion 422 is driven by an opening and closing driving mechanism 423 to perform opening and closing movements. The specific structures of the duckbill portion 422 and the opening and closing driving mechanism 423 may refer to the prior art.

[0043] When the receiving bucket 421 moves to the right below the seed outlet 442, it can receive the seeds dropped from the seed outlet 442. The seeding wheel 443 of the air-suction precision seeding device 44 rotates synchronously with the rolling frame 41, and the number of suction holes on the seeding wheel 443 is consistent with the number of duckbill mechanisms 42 belonging to the same circumferential array, so that the suction holes correspond to the duckbill mechanisms 42 one by one, and every time the receiving bucket 421 passes right below the seed outlet 442, seeds fall into the receiving bucket 421, ensuring the sowing accuracy.

[0044] When the precision seeder is in operation, the film covering mechanism 3 first covers the soil with a film, and the duckbill mechanism 42 of the sowing mechanism 4 then pierces the film to plant the seeds into the soil, so that each seed has a hole for ventilation and germination. The sowing mechanism 4 combines the advantages of the traditional pneumatic seeding device and the traditional duckbill sowing mechanism by integrating the air-suction precision seeding device 44 into the rolling frame 41. On the one hand, the air-suction precision seeding device 44 can accurately discharge the seeds, and on the other hand, the duckbill mechanism 42 can pierce the film and sow the seeds to a certain depth to ensure the germination rate, without the need to set up a furrowing mechanism.

[0045] Preferably, two groups of duckbill mechanisms 42 arranged in a circumferential array are installed on the rolling frame 41; the air-suction precision seeding device 44 has two seeding wheels 443, and the seeding wheels 443 are arranged one by one in a circumferential array, so that each sowing mechanism 4 can realize double-path seeding. The opening direction of the duckbill mechanism 42 is perpendicular to the forward direction of the frame 1, so that the seeds can be better placed to prevent the seeds from being trapped in the duckbill mechanism 42, and the duckbill mechanism 42 can also fully separate the soil to ensure that the seeds can enter the soil without drying.

[0046] Preferably, the frame 1 is provided with three groups of sowing mechanisms 4 distributed on the left and right; the soil collecting mechanism 2 is connected to a soil conveying mechanism 5, and the soil conveying mechanism 5 includes a main conveying channel 51 and a branching structure disposed at the rear side of the main conveying channel 51, such as Figure 2-3 As shown, the branching structure includes a soil throwing pipe 52 leading from the main conveying channel 51 to the front side of each sowing mechanism 4, and also includes a soil throwing guide groove 53 leading from the main conveying channel 51 to the rear side of the sowing mechanism 4.

[0047] Preferably, if Figure 3 As shown, there are two soil throwing guide grooves 53, which include a main groove 53a passing through two adjacent sowing mechanisms 4 and two forked grooves 53b located at the rear side of the main groove 53a, and the main groove 53a and the two forked grooves 53b form a Y-shaped structure; the two forked grooves 53b lead to the rear sides of the two adjacent sowing mechanisms 4 respectively.

[0048] In the above structure, the divergent structure can effectively distribute the soil transported by the main transport channel 51 to the front and rear sides of each sowing mechanism 4. The soil transported to the front side of the sowing mechanism 4 can timely suppress the film laid by the film covering mechanism 3 to prevent the film from being blown off or bulging by strong winds, affecting subsequent sowing operations. The soil transported to the rear side of the sowing mechanism 4 can cover the holes opened by the duckbill mechanism 42 to prevent the seeds from being exposed and affecting the germination rate.

[0049] Preferably, the soil conveying mechanism 5 further includes a conveying belt 54 disposed at the bottom of the main conveying channel 51. Figure 7 As shown, the conveyor belt 54 has a V-shaped protrusion 55, and the conveyor belt 54 has an inclined portion and a straight portion. When the conveyor belt 54 is running, the protrusion 55 can play a role in scooping soil to ensure that enough soil can cross the coating mechanism 3 to reach the rear side of the coating mechanism 3.

[0050] Preferably, a soil distribution mechanism 5A is installed on the rear side of the conveyor belt 54. Fig.12 As shown, the soil distribution mechanism 5A includes a transition plate 56 mounted between the rear end of the conveyor belt 54 and the branch structure, and also includes a movable plate 57 that can slide left and right relative to the transition plate 56; a plurality of first soil leakage holes 56a are formed on the transition plate 56, and the first side of each of the first soil leakage holes 56a has a first retaining edge 56b; the movable plate 57 is formed with the same number of second soil leakage holes 57a as the first soil leakage holes 56a, and the second side of each of the second soil leakage holes 57a has a second retaining edge 57b. The first side is parallel to the second side and arranged oppositely, the main body of the movable plate 57 is placed on the lower side of the main body of the transition plate 56, and the second retaining edge 57b passes through the main body of the transition plate 56. By adjusting the position of the movable plate 57, the overlapping area of ​​the first soil leakage hole 56a and the second soil leakage hole 57a, as well as the width of the channel between the adjacent first retaining edge 56b and the second retaining edge 57b can be changed. A part of the soil reaches the soil throwing guide groove 53 through the channel between the first retaining edge 56b and the second retaining edge 57b, and the other part of the soil falls into the soil throwing pipe 52 through the first soil leakage hole 56a and the second soil leakage hole 57a. By adjusting the position of the movable plate 57, the proportion of soil allocated to the soil throwing pipe 52 and the soil throwing guide groove 53 can be changed.

[0051] Preferably, if Figure 6As shown, the soil collecting mechanism 2 includes a first auger 21 and a second auger 22 arranged front and back, the first auger 21 has two first auger blades with opposite rotation directions on the left and right sides, and the second auger 22 has two second auger blades with opposite rotation directions on the left and right sides; the first auger blade and the second auger blade located on the same side have opposite rotation directions, the first auger blade produces a pushing force on the soil with a force component toward the middle and backward, and the second auger blade produces a pushing force on the soil with a force component toward the middle and forward, so that the first auger blade and the second auger blade on the same side can gather the soil in the middle and push it backward. With the above structure, the first auger 21 and the second auger 22 operate synchronously, which can fully gather the soil to the middle and play the role of leveling the soil at the same time. The gathered soil is transported backward by the soil conveying mechanism 5.

[0052] Preferably, if Figure 8 As shown, the film laminating mechanism 3 includes a fixed frame 31 fixed on the frame 1, on which a film roll 32 and a film pressing roller 33 are installed, and the film pressing roller 33 is connected to the fixed frame 31 through a first push rod 34 and a pressure sensor 35; the film roll 32 is driven by a motor 36 to rotate relative to the fixed frame 31; the film released by the film roll 32 is laid on the ground after passing through the film pressing roller 33. The control system monitors the reaction force of the film on the film pressing roller 33 through the pressure sensor 35. When the reaction force is too large, the first push rod 34 contracts and increases the speed of the motor 36; when the reaction force is too small, the first push rod 34 extends and reduces the speed of the motor 36. In this way, the film can be tightened with an appropriate force to ensure the quality of the lamination while preventing the film from being broken.

[0053] Preferably, there are two first push rods 34, which are respectively connected to two ends of the lamination roller 33. By providing two first push rods 34, dynamic balance of pressure on both sides can be achieved.

[0054] Preferably, if Fig. 9 As shown, a detection sensor 37 for detecting the film is installed at the lower end of each first push rod 34 , and also includes a correction mechanism 38 . The control system can control the correction mechanism 38 to correct the film based on the data collected by the detection sensor 37 .

[0055] Specifically, the laminating roller 33 includes two roller bodies 33a and a roller shaft 331. Fig.10As shown, the roller body 33a includes a fixed end plate 332, a movable end plate 333, a plurality of metal strips 334 and a rubber skin 335. All the metal strips 334 are arranged in a circular array, and the metal strips 334 are arranged between the fixed end plate 332 and the movable end plate 333. The rubber skin 335 is arranged around all the metal strips 334. The fixed end plate 332 is fixed to the middle of the roller shaft, and the movable end plate 333 is installed at the end of the roller shaft 331. The correction mechanism changes the axial position of the movable end plate 333 on the roller shaft 331. Preferably, the roller shaft 331 is a hollow structure, and the correction mechanism 38 includes a pull rod 381 and a second push rod 382, ​​as shown in FIG. Fig.11 As shown, the tie rod 381 is located in the roller shaft 331 and can move axially relative to the roller shaft 331. A connecting portion 336 connected to the tie rod 381 is installed on the movable end plate 333. A clearance groove for the connecting portion 336 to move is formed on the roller shaft 331. Specifically, a disk-shaped member 383 is fixed on the tie rod 381. The outer circumference of the disk-shaped member 383 forms an annular groove, and the connecting portion 336 is embedded in the annular groove. The connecting portions 336 corresponding to the two movable end plates 333 are connected to the same tie rod 381. During the deviation correction, the second push rod 382 moves the pull rod 381 in the target direction (i.e., the direction in which the film needs to move laterally), so that the distance between the fixed end plate 332 and the movable end plate 333 of one roller body 33a can be reduced, the deformation of the metal strip 334 can be increased, and the rubber skin 335 can be expanded to increase the tension on the film. At the same time, the distance between the fixed end plate 332 and the movable end plate 333 of the other roller body 33a can be increased, and the deformation of the metal strip 334 can be reduced, so that the tension of the rubber skin 335 on the film can be reduced, and the film can move to the side of the roller body 33a with greater tension, thereby achieving deviation correction. Preferably, the diameter of the fixed end plate 332 is larger than the diameter of the movable end plate 333, which is more conducive to the axial movement of the film.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A precision seeder with integrated film covering function, comprising a frame (1), on which a soil collecting mechanism (2), a film covering mechanism (3) and a seeding mechanism (4) arranged in a front-to-rear manner are mounted; the soil collecting mechanism (2) is connected to a soil conveying mechanism (5), and the soil conveying mechanism (5) comprises a main conveying channel (51) and a branching structure arranged at the rear side of the main conveying channel (51); the characteristics are: The soil collecting mechanism (2) comprises a first auger (21) and a second auger (22) arranged in a front-to-back manner; The frame (1) is provided with three groups of sowing mechanisms (4) distributed on the left and right; the branching structure comprises a soil throwing pipe (52) leading from the main conveying channel (51) to the front side of each sowing mechanism (4), and also comprises a soil throwing guide groove (53) leading from the main conveying channel (51) to the rear side of the sowing mechanism (4); The soil throwing guide grooves (53) are two in number, and include a main groove (53a) passing through two adjacent sowing mechanisms (4) and two bifurcated grooves (53b) located at the rear side of the main groove (53a), wherein the main groove (53a) and the two bifurcated grooves (53b) form a Y-shaped structure; the two bifurcated grooves (53b) respectively lead to the rear sides of two adjacent sowing mechanisms (4); The soil transported to the front side of the sowing mechanism (4) presses down the film laid by the film covering mechanism (3) to prevent the film from being blown off or bulging due to strong winds; the soil transported to the rear side of the sowing mechanism (4) covers the holes opened by the duckbill mechanism (42) to prevent the seeds from being exposed and affecting the germination rate; A soil distribution mechanism is installed on the rear side of the conveyor belt (54); The soil distribution mechanism comprises a transition plate (56) mounted between the rear end of the conveyor belt (54) and the branching structure, and also comprises a movable plate (57) capable of sliding leftward and rightward relative to the transition plate (56); a plurality of first soil leakage holes (56a) are formed on the transition plate (56), and a first side of each of the first soil leakage holes (56a) has a first retaining edge (56b); the movable plate (57) comprises second soil leakage holes (57a) of the same number as the first soil leakage holes (56a), and a second side of each of the second soil leakage holes (57a) has a second retaining edge (57b); The first side of the first soil leakage hole (56a) and the second side of the second soil leakage hole (57a) are arranged parallel to and opposite to each other; the main body of the movable plate (57) is placed on the lower side of the main body of the transition plate (56), and the second retaining edge (57b) passes through the main body of the transition plate (56); a portion of the soil reaches the soil throwing guide groove (53) through the channel between the first retaining edge (56b) and the second retaining edge (57b), and another portion of the soil falls into the soil throwing pipe (52) through the first soil leakage hole (56a) and the second soil leakage hole (57a); and the proportion of soil distributed to the soil throwing pipe (52) and the soil throwing guide groove (53) can be changed by adjusting the position of the movable plate (57); The soil conveying mechanism (5) further comprises a conveying belt (54) disposed at the bottom of the main conveying channel (51), and the conveying belt (54) has a V-shaped protrusion (55).

2. The precision seeder with integrated film covering function according to claim 1, characterized in that: The sowing mechanism (4) comprises a rolling frame (41) and a plurality of duckbill mechanisms (42) arranged in a circumferential array on the rolling frame (41), and also comprises a seed box (43); the sowing mechanism (4) also comprises an air-suction type precision seed metering device (44) arranged at the inner center of the rolling frame (41), and the shell of the air-suction type precision seed metering device (44) comprises a seed inlet (441) and a seed outlet (442); the seed box (43) is connected to the seed inlet (441), and a seed wheel (443) is provided in the shell, and the seed wheel (443) comprises suction holes arranged in a circumferential array, and the shell is connected to an air pipe capable of generating a pressure difference on both sides of the suction hole; The duckbill mechanism (42) comprises a receiving bucket (421) and a duckbill portion (422) located below the receiving bucket (421); the duckbill portion (422) is driven by an opening and closing driving mechanism (423) to perform an opening and closing movement.

3. The precision seeder with integrated film covering function according to claim 2, characterized in that: Two groups of duckbill mechanisms (42) arranged in a circular array are installed on the rolling frame (41); the air suction type precision seed metering device (44) has two seed metering wheels (443).

4. The precision seeder with integrated film covering function according to claim 1, characterized in that: The laminating mechanism (3) comprises a fixed frame (31) fixed on the frame (1); a film reel (32) and a film pressing roller (33) are mounted on the fixed frame (31); the film pressing roller (33) is connected to the fixed frame (31) via a first push rod (34) and a pressure sensor (35); the film reel (32) is driven by a motor (36) to rotate relative to the fixed frame (31); and the film released from the film reel (32) is laid on the ground after passing through the film pressing roller (33).

5. The precision seeder with integrated film covering function according to claim 4, characterized in that: There are two first push rods (34), which are respectively connected to two ends of the film pressing roller (33).

6. The precision seeder with integrated film covering function according to claim 5, characterized in that: A detection sensor (37) for detecting the film is installed at the lower end of each first push rod (34), and also includes a deviation correction mechanism (38). The control system can control the deviation correction mechanism (38) to correct the deviation of the film based on data collected by the detection sensor (37).

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