Seed population suspension homogenization collecting, exhausting and downward separation type seed metering system and machine tool for seed population suspension homogenization collecting, exhausting and downward separation type seed metering system

Abstract

The invention belongs to the technical field of crop sowing, and particularly relates to a seed population suspension homogenization collecting, exhausting and downward separating type seed metering system and machine tool which comprises a draught fan, a seed supply device, a seed guide device, a seed mixing device and a seed separating device, and a steering seed bouncing and conveying device is arranged between the seed mixing device and the seed separating device. The steering seed popping and conveying device comprises a horizontal conveying part, a steering conveying part and a vertical conveying part, a bionic dune turbulent flow structure pipeline is embedded in the horizontal conveying part, the vertical conveying part is a wave-straight alternating structure pipeline, the steering conveying part comprises a seed popping pipe, and the two ends of the seed popping pipe are connected with a horizontal connecting pipe and a vertical connecting pipe in a zigzag mode respectively. Compared with the prior art, the invention has the following advantages: traditional upward seed metering is changed into downward seed metering, and under the condition of the same seed metering rate, the energy consumption of the air collecting and exhausting type seed metering system is effectively reduced; by reasonably designing the structure of the conveying pipeline, the displacement consistency variable coefficient of each row is effectively reduced, the production cost is reduced, and the conveying pipeline is suitable for popularization and application.

Description

Technical Field

[0001] The present invention belongs to the technical field of crop sowing, and in particular relates to a population suspension homogenization, exhaust gas collection and delivery downward divided seeding system and machine. Background Art

[0002] Sowing is a key link in agricultural production, and the quality of sowing significantly determines the yield and quality. As an efficient, high-yield and stable sowing method, air-assisted sowing is widely used in production practices in various places. Improving distribution uniformity is an important way to form a good crop group structure and improve ventilation and light transmission. The application team disclosed in the application text with application number 202310259199.9 that a multi-purpose seed drill machine has a distributor with a lotus leaf vein structure guide groove. By optimizing the structure of the distribution device, the sowing uniformity of each row is improved, which facilitates agricultural researchers to conduct various field experiments. When in use, the distribution device discharges seeds upward, that is, the seed inlet pipe is below the multi-row seed distributor, and the seed-gas mixed fluid enters the distributor from bottom to top and is distributed and then discharged by the seed discharge pipe. In order to ensure the seed supply effect, the wind speed must reach 22m / s. With the development of technology, there are higher requirements for the speed of sowing operations. The application text with application number 202410366554.7 discloses a high-throughput mixed seed device for an air-transported seeding system. By improving the structure of the mixed seeding device, the mixed seeding amount is increased and high-speed sowing operations are achieved. Its distribution device also sows seeds upward. In order to ensure the qualified rate of seeds, a large-power fan is required to cooperate with the operation, which increases the overall equipment cost and is not conducive to promotion and application. At the same time, the energy consumption is higher during the operation, which is not in line with the concept of green and sustainable development. Summary of the Invention

[0003] The purpose of the present invention is to use an upward distribution method for the traditional air-collecting and air-conveying seeding system. Due to the influence of the gravity of the particles themselves, the mass of seeds transported per unit time by the air-collecting and air-conveying seeding system increases when the operating speed is increased, resulting in higher wind speed and pressure required for the seeding system, which places high demands on the performance of the fan. If the upward distribution is simply changed to downward distribution, the problem of seed particles accumulating in the duct will easily occur. The present invention provides a population suspension homogenization air-collecting and air-conveying downward distribution seeding system and a machine using the seeding device, which converts the gravity of the seeds themselves from transportation resistance to transportation power, avoids congestion and retention of the population in the pipeline due to low wind speed, and effectively reduces the energy consumption of the air-collecting and air-conveying seeding system. At the same time, the design of the conveying pipeline structure ensures that all performance indicators of the seeding system meet agronomic requirements.

[0004] The present invention is achieved through the following technical solutions: a population suspended homogenized exhaust and conveying downward-dividing seeding system, comprising a fan, a seed supply device, a seed guiding device, a seed mixing device and a seed separation device, a steering seed conveying device is provided between the seed mixing device and the seed separation device, and the seed separation device is a downward seed guiding structure; the steering seed conveying device comprises a horizontal conveying component, a steering conveying component and a vertical conveying component, the horizontal conveying component is embedded with a bionic dune spoiler structure, and the vertical conveying component is a wave-straight alternating structure pipeline; the reasonable arrangement of the structures of the horizontal conveying component, the vertical conveying component and the steering conveying component makes the seeds evenly and discretely distributed during the conveying process, avoiding accumulation during the transmission process.

[0005] Specifically, the seed mixing device includes a seed dropping pipe, the lower end of which is inclined toward the forward direction of the airflow; the horizontal part of the seed mixing device includes an air intake section, a deceleration section, a seed-air mixing section, an acceleration section, a conveying section, and a seed-air mixing output section; The seed-gas mixing section is arranged below the seed drop pipe. The bottom of the seed-gas mixing section is provided with a guide slope extending toward the seed-gas mixing output section. The other side of the backflow slope is provided with an air-facing slope. The seed drop pipe passes through the wall of the seed-gas mixing section and is inclined toward the guide slope.

[0006] Specifically, the angle between the central axis of the seed tube and the central axis of the horizontal conveying component is 30°-60°; the horizontal length of the turning conveying component is 60-120 mm. Through experimental analysis, it is found that the motion state of the seed particles after collision is affected by the aforementioned angle, and its value range must meet the dynamic balance between momentum maintenance and friction dissipation. The length of the horizontal conveying component is 200-600 mm, and the embedded bionic dune spoiler structure is an inner wall provided with outwardly protruding saw teeth, the saw tooth angle is -30~-60°, the height is 5-10 mm, and the width is 5-15 mm.

[0007] Specifically, the inner wall of the pipe with alternating wave and straight structure is an alternating structure of convex corrugations and straight walls, and the length of the vertical conveying component is 200-800mm; the peak radius of the convex corrugations is 2-8mm, and the length of each straight wall section is 5-15mm.

[0008] Furthermore, the horizontal conveying component and the steering conveying component are an integrated structure, which can ensure the stability of the overall structure after installation. The lower end of the steering conveying component is connected to the upper end of the vertical conveying component through an annular chuck.

[0009] A machine using a seed population suspension homogenization, air collection and delivery, and a divided seeding system, comprising a frame, a rotary tillage device, a furrowing device, a pressing device, and a fertilizing device, wherein the seed separation device or a steering seed delivery device is fixed to the frame via a connecting plate; specifically, the steering seed delivery device is fixed to the frame via a horizontal connecting plate at the bottom of the seed separation device; Two groups of seed populations are suspended and homogenized, and the exhaust and downward-distributed seeding system is symmetrically arranged on both sides of the fan to ensure the effective use of the machine.

[0010] The horizontal conveying component is a pipe with an embedded bionic dune disturbance structure. The bionic dune disturbance structure forms a disturbance area near the wall. When the seeds settle close to the wall under the action of gravity, the disturbed airflow will push the seeds away from the wall again, reducing the particle sedimentation phenomenon and the probability of collision between the seed particles and the pipe wall, making the seed particles more discrete and uniformly distributed in the pipe. The movement of particles in the vertical conveying component is analyzed based on the principles of fluid mechanics. The seed particles are affected by multiple forces in the airflow field, mainly including the gravity of the seeds themselves, the drag of the airflow, and the lift generated by the rotation of the seeds during movement. Therefore, the vertical conveying component uses a wave-straight alternating structure pipe. By designing alternating convex corrugations and straight walls, a turbulent flow with greater disturbance can be formed in the pipe, which effectively reduces the probability of collision between the seed particles in the pipe and the pipe wall, making the seed particles more discrete and uniformly distributed in the pipe, and reducing the coefficient of variation of the consistency of the displacement of each row.

[0011] The function of the diverting conveyor is to shift the movement of the seed population from horizontal to vertical transport. Existing curved seed guides are prone to centrifugal accumulation of seed populations on the outer ridges of the curved pipes, resulting in a poor coefficient of variation in the consistent discharge volume across rows. Therefore, numerical simulation analysis of the diverting conveyor was conducted. The results show that when particles enter the diverting component from the horizontal conveyor, their velocity can be roughly considered horizontal. After an inelastic collision with the diverting component, the particles enter the vertical conveyor. This collision process follows the principle of collision reflection, suppressing centrifugal accumulation. This results in a more uniform distribution of seed populations upon entering the vertical conveyor, and a lower coefficient of variation in the consistent discharge volume across rows.

[0012] During the working process, the seed population first falls from the seed box into the seed supply device, and is then introduced into the seed mixing device. At the same time, the air flow in the air duct passes through the seed mixing device, carrying the seed population and pushing them to the horizontal conveying component. After passing through the steering conveying component, it enters the vertical conveying component and is then transported to the seed separation device, and then discharged through the seed guide port for sowing.

[0013] Compared with the prior art, the present invention has the following advantages: (1) The seeding system of the present invention adjusts the traditional upward seeding to downward seeding, converting the seed's own gravity from a conveying resistance to a conveying power, thus avoiding congestion and retention of seed populations in the pipeline due to low wind speed. Under the same seeding rate conditions, the required wind speed can be reduced by about 50%, effectively reducing the energy consumption of the air-collecting and conveying seeding system; (2) By rationally designing the structure of the delivery pipe, the distribution of seed particles in the serrated pipe is made more discrete and uniform, effectively reducing the coefficient of variation of the consistency of the discharge volume of each row; at the same time, the phenomenon of centrifugal accumulation at the bend is avoided; (3) The installation position of the seeding system on the machine is reasonably designed. Compared with the existing air-transported seeder, the length of the seed guide tube behind the distribution device is greatly shortened, making the overall structure simpler, greatly reducing the energy consumption of the airflow in the seed guide tube, reducing production costs, and being suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the machine in Example 1.

[0015] Figure 2 It is a structural diagram of the horizontal connecting plate.

[0016] Figure 3 It is a three-dimensional diagram of a population suspension homogenization collection and exhaust delivery downward divided seeding system.

[0017] Figure 4 This is a cross-sectional view of a population suspension homogenization, exhaust collection and downward distribution seeding system.

[0018] Figure 5 is a cross-sectional view of the mixing device.

[0019] Figure 6 It is a cross-sectional view of the steering seed conveying device.

[0020] Figure 7 It is a marked diagram of the steering seed conveying device of Example 1.

[0021] Figure 8 It is a labeled diagram of the steering seed delivery device of control group 1.

[0022] Figure 9 This is a dimensional drawing of the horizontal conveying component of Example 1.

[0023] Figure 10 It is a structural diagram of the vertical conveying component in Example 1.

[0024] Figure 11 It is a structural diagram of the steering and conveying component in Example 1.

[0025] Figure 12These are the particle velocity distribution and internal flow field velocity distribution cloud diagrams of different horizontal conveying types, specifically smooth type (a), corrugated type (b) and sawtooth type (c).

[0026] Figure 13 It is the coefficient of variation of the number of collisions caused by different horizontal conveying modes on the population and the uniformity of seed distribution.

[0027] Figure 14 These are the particle velocity distribution and internal flow field velocity distribution cloud diagrams for different steering transport types, specifically arc type (a), straight line type (b) and broken line type (c).

[0028] Figure 15 It is the coefficient of variation of the number of collisions caused by different steering conveying types on the population and the uniformity of seed distribution.

[0029] Figure 16 These are the particle velocity distribution and internal flow field velocity distribution cloud diagrams of different vertical conveying types, specifically sawtooth type (a), straight type (b), wave tooth type (c) and wave and straight alternating type (d).

[0030] Figure 17 It is the coefficient of variation of the number of collisions caused by different vertical conveying types on the population and the uniformity of seed distribution. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] The following will clearly and completely describe the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. Example 1

[0033] like Figure 1-7 As shown, a population suspension homogenization exhaust and downward separation seeding system includes a fan 5, a seed supply device 6, a seed guide device 2, a seed mixing device 1 and a seed separation device 4. The seed separation device is a downward seed guiding structure. The seed mixing device 1 is arranged below the seed guide device 2. A steering seed conveying device 3 is provided between the seed mixing device 1 and the seed separation device 4. The steering seed conveying device 3 includes a horizontal conveying component 31, a steering conveying component 32 and a vertical conveying component 33. The horizontal conveying component 31 is an embedded bionic dune spoiler structure. The angle α between the central axis of the steering conveying component 32 and the central axis of the horizontal conveying component 31 is 45°. The length L1 of the horizontal conveying component 31 is 500 mm, the horizontal length L2 of the steering conveying component 32 is 90 mm, and the length L3 of the vertical conveying component 33 is 200 mm. Figure 9 The inner diameter D1 of the horizontal conveying component is 55mm, the outer diameter D2 is 76mm, and the embedded bionic dune spoiler structure is a sawtooth protruding outward, the sawtooth angle β is -45°, the height h is 5mm, and the width d is 10mm; the vertical conveying component is a wave-straight alternating structure pipeline, as shown Figure 10 The inner wall of the pipe with the alternating wave and straight structure is an alternating structure of convex corrugations 331 and straight walls 332. The peak radius of the convex corrugations 331 is 5 mm, and the length of each straight wall 332 is 10 mm. Figure 11 The diverting conveying component 32 shown includes a seed tube 321, the two ends of which are respectively connected to a horizontal connecting tube 323 and a vertical connecting tube 322 in a folded shape; the horizontal conveying component 31 and the diverting conveying component 32 are an integrated structure, and the lower end of the diverting conveying component 32 is connected to the upper end of the vertical conveying component 33 via an annular chuck 34; The seed mixing device 1 includes a seed dropping tube 18, the lower end of which is inclined toward the forward direction of the airflow; the horizontal portion of the seed mixing device includes an air intake section 11, a first deceleration section 12, a seed-air mixing section 13, an acceleration section 14, a conveying section 15, a second deceleration section 16, and a seed-air mixing output section 17; The seed-gas mixing section 13 is arranged below the seed drop pipe 18. The bottom of the seed-gas mixing section 13 is provided with a guide slope extending toward the seed-gas mixing output section 17. The other side of the backflow slope is provided with an air-facing slope. The seed drop pipe penetrates the wall of the seed-gas mixing section and is inclined toward the guide slope.

[0034] A machine using a population suspension homogenization, air collection and delivery, downward divided seeding system, includes a frame 1, a rotary tillage device, a furrowing device, a pressing device and a fertilizing device, the steering seed conveying device 3 is fixed to the frame 1 through a horizontal connecting plate 71 at the bottom of the seed separation device, and the horizontal connecting plate 71 includes a circular plate-type connecting piece 711 for fixing to the bottom of the seed separation device and a strip-shaped connecting piece 712 connected to the frame; two groups of population suspension homogenization, air collection and delivery, downward divided seeding systems are symmetrically arranged on both sides of the fan 5.

[0035] In this embodiment, the horizontal conveying component 31 , the turning conveying component 32 and the vertical conveying component 33 are made of ABS material. Example 2

[0036] A population suspension homogenization, exhaust and downward-split seeding system. Based on Example 1, the angle α between the central axis of the steering conveying component and the central axis of the horizontal conveying component is 30°, the length L1 of the horizontal conveying component 31 is 200 mm, the horizontal length L2 of the steering conveying component 32 is 120 mm, and the length L3 of the vertical conveying component 33 is 800 mm. Example 3

[0037] A population suspension homogenization, exhaust and downward-split seeding system. Based on Example 1, the angle α between the central axis of the steering conveying component and the central axis of the horizontal conveying component is 60°, the length L1 of the horizontal conveying component 31 is 600mm, the horizontal length L2 of the steering conveying component 32 is 60mm, and the length L3 of the vertical conveying component 33 is 400mm.

[0038] Control group 1 A population suspension homogenization collection and exhaust delivery down-type seeding system, based on Example 1, the horizontal conveying component is a straight tube with a smooth inner wall, the vertical conveying component is a serrated tube, and the steering conveying component is an arc tube, such as Figure 8 As shown, the angle α between the central axis of the steering conveying component and the central axis of the horizontal conveying component is 90°, the length L1 of the horizontal conveying component is 400 mm, the length L2 of the steering conveying component is 180 mm, and the length L3 of the vertical conveying component is 200 mm.

[0039] Control group 2 A population suspension homogenization, exhaust gas collection and delivery downward distribution seeding system, based on control group 1; a downward distribution, exhaust gas collection and delivery type seeding system, based on embodiment 1, the horizontal conveying component and the vertical conveying component are both serrated tubes, and the turning conveying component is an arc tube.

[0040] Control group 3 Select the distribution device in application number CN202310259199.9 and Figure 1 Medium seeder.

[0041] In order to verify the experimental results, the following experiments were carried out In this experiment, Zhenmai No. 10 seeds were selected as experimental materials. The average seed weight of 1000 grains was 40.63 g, and the moisture content was 9.6%. An anemometer and a tachometer were used to adjust the wind speed and rotation speed respectively. The experimental time was 1 min. After the seeding was completed, the seeds were weighed and the data was recorded. The experiment was repeated 3 times and the average value was taken.

[0042] (1) Comparative test on energy consumption of wheat seeding The test results are as follows: Table 1

[0043] The test results in Table 1 show that when the seeding rate is the same, the downward distribution seeding system requires a lower inlet air flow velocity than the upward distribution seeding system.

[0044] According to the energy consumption calculation formula: It can be seen that when the seeding rate is 90g / s, the energy consumption is reduced by 52%; when the seeding rate is 110g / s, the energy consumption is reduced by 49%; when the seeding rate is 130g / s, the energy consumption is reduced by 44%; the seeding uniformity meets the agronomic technical requirements.

[0045] (2) Application test of the steering seed conveying device The seed separation performance test standard refers to GB / 9478-2005 Grain Drill Test Method, and the coefficient of variation (RCV) of the row displacement consistency is used as the evaluation index for the seed separation performance of the air-assisted split seeding system. The test results are as follows: Table 2

[0046] The test results in Table 2 show that the use of a steering seed delivery device can effectively reduce the coefficient of variation of the seeding consistency of each row and improve the sowing quality.

[0047] (3) Functional test of the vertical conveying component of the steering seed conveying device The inlet air velocity was 22 m / s, the seed supply rate was 3000 seeds / s, and other conditions were shown in Table 3.

[0048] Table 3

[0049] Table 4

[0050] According to national standards and agronomic requirements, the coefficient of variation of the consistency of the row displacement of the wheat exhaust and conveying downward split seeder can be seen from the data in Table 4. It can be seen that the coefficient of variation of the seed distribution uniformity at the outlet of Example 1 is significantly reduced compared with the control group 2, the number of collisions between the seeds and the pipe wall in the vertical conveying component is significantly reduced, and the coefficient of variation of the consistency of the row displacement is reduced, indicating that the wave-straight alternating pipe can reduce the number of collisions between the seeds and the pipe wall compared with the embedded serrated seed structure pipe, and improve the uniformity of seed production.

[0051] In order to intuitively analyze the influence of the horizontal conveying component 31, the steering conveying component 32 and the vertical conveying component 33 in the diverting seed conveying device 3, the population flow is simulated based on the DEM-CFD gas-solid coupling method. Referring to the parameters in experiment (3), the horizontal conveying component 31 is set to a smooth type (a), a corrugated type (b) and a sawtooth type (c) for simulation. The sawtooth type is the specification in Example 1, and the wave height and wave width of the corrugated type are the same as the sawtooth height and width. Figure 12 The particle velocity distribution and internal flow field velocity distribution cloud diagram of different horizontal conveying types. When the horizontal conveying component is smooth, the air flow velocity is high due to the small friction resistance of the inner wall surface, resulting in the formation of a core high-speed area and an edge low-speed area in the smooth pipe. Figure 12 As shown in (a), the velocity distribution is uneven. Both the wave-tooth type and the sawtooth type have embedded iterative trough and peak structures. The friction between the airflow and the wall increases, thereby changing the flow state of the airflow and generating more turbulence. The airflow velocity decreases and is evenly distributed. Figure 12 (b), (c); through Figure 13 It can be seen that the coefficient of variation of seed distribution uniformity of the sawtooth type is better than that of the wave tooth type.

[0052] Figure 14 For particle velocity distribution and internal flow field velocity distribution cloud diagrams of different steering conveying types, the steering conveying component 32 is set to an arc type (a), a straight line type (b) and a broken line type (c) for simulation, wherein the broken line type is the specification in Example 1, and the horizontal lengths of the arc type and the straight line type are the same as the horizontal length of the broken line type in Example 1. When the steering conveying component adopts an arc type, due to the streamlined design, the curvature of the turn is relatively gentle, and most of the particles move in the vertical direction along the outer side of the arc wall. Figure 14 As shown in (a), the turbulence intensity of the airflow is not enough to effectively and evenly distribute the population particles, especially the accumulation phenomenon occurs at the outer ridge, which increases the number of collisions between the population and the wall. The population distribution in the vertical conveying component tube is biased toward the outside of the tube wall, so the population distribution uniformity is poor; when the population passes through the linear turning conveying component, due to the increase in the linear turning angle, a strong airflow field distortion is generated. The airflow separation and the formation of turbulence increase the instability of the airflow, causing the airflow to generate vortices at the turning right angle. Some particles gather and swirl in this area. Figure 14 As shown in (b), turbulence and eddies cause seeds to collide frequently, increasing the accumulation phenomenon. When the steering conveying component is a broken line, the airflow path is optimized through the segmented structure, avoiding excessive steering, effectively balancing the driving force and energy loss of the airflow, and the airflow is evenly distributed. The phenomenon of seed population retention and aggregation at the corner is alleviated. Figure 14 As shown in (c), the number of collisions between the population and the wall is reduced, combined with Figure 15 It can be seen that the coefficient of variation of the seed distribution uniformity of the broken line type steering conveying component 32 can ensure a better seeding effect.

[0053] Figure 16 The particle velocity distribution of different vertical conveying types and the velocity distribution cloud of the flow field inside the conveying component are shown in the figure. Figure 17The number of collisions caused by different vertical conveying types on the population and the coefficient of variation of seed distribution uniformity are respectively set for the vertical conveying component 33 to be simulated, wherein the wave-straight alternating type (d) is the specification in Example 1, the height of the sawtooth type and the radius of the wave tooth type are the same as the radius of the outer convex corrugation 331 in Example 1. When the vertical conveying component is a sawtooth type, its internal iterative sawtooth structure generates eddy currents through periodic disturbances such as Figure 16 As shown in (a), the presence of vortices helps to break the laminar flow state and promotes sufficient mixing between fluid molecules, thereby improving the uniformity of seed distribution. However, although excessive vortices and disturbances help to improve mixing efficiency, they also lead to increased collisions between seeds, disordered movement trajectories of the population in the vertical conveying component, and thus cause the coefficient of variation of seed distribution uniformity to be 10.98%. The internal structure of the wave-tooth type is similar to that of the sawtooth type, and its interior is an iterative corrugation. Due to the gentle corrugation curve, the vortex generated by periodic disturbance is less than that of the sawtooth type. Figure 16 As shown in (c), the mixing efficiency of airflow and seed particles is low. At the same time, the velocity fluctuation caused by periodic disturbances leads to increased instability of the fluid, causing the population to collide violently with the wall, and the coefficient of variation of the seed distribution uniformity is 13.22%. Figure 16 As shown in (b), when the vertical conveying component is smooth, the fluid forms a laminar flow state at a lower flow rate. The fluid molecules flow in parallel layers, and the speed is the largest in the center-to-right area. The speed gradually decreases near the tube wall, forming fewer high-speed areas and more low-speed edges. In addition, the smooth tube inner wall lacks structural features that can disperse the flow trend of the seeds, resulting in fewer collisions between the population and the wall, reducing the degree of mixing between the airflow and the population, and the movement speed of the population increases accordingly. Figure 17 As shown in Figure 2, the seed particles attract each other and agglomerate, which affects the uniformity of population distribution. The coefficient of variation of seed distribution uniformity is 14.18%. Figure 16 The alternating wave-straight pipe shown in (b) can effectively balance the effects of vortex and laminar flow through the structural design of alternating corrugations and straight sections, thereby achieving stable fluid flow. The fluid forms vortices due to the corrugated sections, while the straight sections help to attenuate the vortices, thus forming a dynamic balance inside the pipe. By controlling the formation and attenuation of vortices, the alternating wave-straight pipe can maintain a more stable flow state of the fluid. The stable flow state helps to reduce the probability of collision between the population and the wall, avoid excessive aggregation of the population in the pipe, and reduce the unevenness of the population distribution. At the same time, the stable flow state can also reduce velocity fluctuations such as Figure 17 As shown in the figure, the distribution uniformity of the population is further improved, and the coefficient of variation of the seed distribution uniformity is 7.54%.

[0054] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0055] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A seed population suspension homogenization and collection exhaust delivery down-type seeding system, including a fan, a seed supply device, a seed guide device, a seed mixing device and a seed separation device, characterized in that: A steering seed conveying device is provided between the seed mixing device and the seed separation device, and the seed separation device is a downward seed guiding structure; the steering seed conveying device includes a horizontal conveying component, a steering conveying component and a vertical conveying component, the horizontal conveying component is an embedded bionic dune spoiler structure pipe, and the vertical conveying component is a wave-straight alternating structure pipe.

2. A seed population suspension homogenization collection and exhaust delivery downward split seeding system as claimed in claim 1, characterized in that: The diverting and conveying component comprises a seed bullet tube, and two ends of the seed bullet tube are respectively connected to a horizontal connecting tube and a vertical connecting tube in a folded shape.

3. A seed population suspension homogenization collection and exhaust delivery downward split seeding system as claimed in claim 2, characterized in that: The angle between the central axis of the seed tube and the central axis of the horizontal conveying component is 30°-60°; the horizontal length of the steering conveying component is 60-120 mm.

4. A seed population suspension homogenization collection and exhaust delivery downward split seeding system as claimed in claim 1, characterized in that: The length of the horizontal conveying component is 200-600mm, and the inner wall of the embedded bionic dune spoiler structure pipe is provided with outwardly protruding serrations, the serration angle is -30°~-60°, the height is 2-14mm, and the width is 5-15mm.

5. The seed population suspension homogenization collection and exhaust delivery downward split seeding system as claimed in claim 1, characterized in that: The inner wall of the pipe with alternating wave and straight structure is an alternating structure of convex corrugations and straight walls, and the length of the vertical conveying component is 200-800mm; the peak radius of the convex corrugations is 2-8mm, and the length of each straight wall section is 5-15mm.

6. A seed population suspension homogenization and exhaust collection and delivery down-type seeding system as claimed in any one of claims 1 to 5, characterized in that: The horizontal conveying component and the steering conveying component are an integrated structure, and the lower end of the steering conveying component is connected to the upper end of the vertical conveying component through an annular chuck.

7. A machine using the seed population suspension homogenization, air collection and delivery down-type seeding system as claimed in claim 6, comprising a frame, a rotary tillage device, a furrowing device, a pressing device and a fertilizing device, characterized in that: The seed separation device or the steering seed delivery device is fixed on the frame through a connecting plate.

8. A machine using a seed population suspension homogenization collection and exhaust delivery down-type seeding system as claimed in claim 7, characterized in that: The diverting seed conveying device is fixed on the frame through the bottom of the seed separation device via a horizontal connecting plate.

9. The machine using the seed population suspension homogenization collection and exhaust delivery down-type seeding system as claimed in claim 7, characterized in that: Two groups of seed populations are suspended and homogenized, and the exhaust and downward-distributed seeding system is symmetrically arranged on both sides of the fan.

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