Automatic rice seedling throwing machine

Abstract

A seedling bin, a seedling combing device, a seedling uniformizing device and an air supply device are installed on a machine frame, the seedling combing device is installed in the seedling bin, seedlings are combed from the seedling bin to the seedling uniformizing device through the seedling combing device, the seedlings are conveyed to the air supply device through the seedling uniformizing device, and the seedlings are thrown into the air through the air supply device. The rice seedlings sequentially pass through the rice seedling combing device, the first-stage rice seedling uniformizing device and the second-stage rice seedling uniformizing device, the field distribution uniformity after rice seedling throwing is ensured under the combined action, the rice seedling clamping risk is reduced, the rice seedling mechanical damage probability is reduced, and the rice seedling combing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery, in particular to a self-sequence rice throwing seedling machine. BACKGROUND

[0002] In the mechanized rice planting system, there are mainly three types of technology: mechanical direct seeding, mechanical transplanting and mechanical throwing seedling. Mechanical direct seeding is to sow the germinated seeds in the field and directly grow seedlings in the field. This method requires high weeding, and needs to ventilate frequently during seed growth, which can breed a large number of weeds and ultimately impact yield. Mechanical transplanting requires factory seedling and transplanting machine operation, and moves and transplants suitable age seedlings to the paddy field according to the agronomic requirements. Mechanical transplanting has lower efficiency than mechanical direct seeding, and the transplanting technology causes great damage to the roots of seedlings, resulting in long slow recovery, slow green, late tillering, and less tillering. Moreover, the structure of the transplanting machine is complex, and the maintenance cost is high. The mechanical throwing seedling technology combines the advantages of mechanical direct seeding and transplanting, has high operation efficiency, and uses the weight of seedlings to shallowly insert into the soil without damaging the roots, which has the advantages of fast green, early tillering, and more tillering.

[0003] The popularization and application of rice throwing seedling technology greatly reduces labor intensity and is an innovation and reform in rice cultivation technology. Patent No. CN118160472A discloses a "pneumatic throwing seedling machine and throwing seedling method", which cannot guarantee the uniformity of the field distribution after throwing seedlings, and cannot reduce the risk of seedling sticking and the probability of seedling mechanical damage. In order to solve the above problems, it is urgent to develop a self-sequence rice throwing seedling machine that can ensure the uniformity of the field distribution after throwing seedlings, reduce the risk of seedling sticking, reduce the probability of seedling mechanical damage, and improve the efficiency of seedling combing. SUMMARY

[0004] Therefore, the present application provides a self-sequence rice throwing seedling machine that can ensure the uniformity of the field distribution after throwing seedlings, reduce the risk of seedling sticking, reduce the probability of seedling mechanical damage, and improve the efficiency of seedling combing.

[0005] In one aspect, the present application provides a rice self-sequence seedling throwing machine, which is provided with a seedling bin, a seedling combing device, a seedling uniformizing device and a seedling blowing device on a machine frame, the seedling combing device is installed in the seedling bin, the seedling combing device combs the seedlings from the seedling bin to the seedling uniformizing device, the seedling uniformizing device delivers the seedlings to the seedling blowing device, and the seedling blowing device throws the seedlings into the air; the seedling uniformizing device comprises a first-level seedling uniformizing device and a second-level seedling uniformizing device, the first-level seedling uniformizing device comprises a first-level conveying belt and a first-level seedling uniformizing wheel, the first-level seedling uniformizing wheel is installed above the first-level conveying belt, the first-level conveying belt and the first-level seedling uniformizing wheel have the same rotating direction, the first-level seedling uniformizing wheel exerts a reverse force on the seedlings when the first-level seedling uniformizing wheel contacts the seedlings, and the reverse force repels the seedlings; the second-level seedling uniformizing device comprises a second-level conveying belt and a second-level seedling uniformizing wheel, the second-level seedling uniformizing wheel is installed above the second-level conveying belt, the second-level conveying belt and the second-level seedling uniformizing wheel have the same rotating direction, the second-level seedling uniformizing wheel exerts a reverse force on the seedlings when the second-level seedling uniformizing wheel contacts the seedlings, and the reverse force repels the seedlings; the first-level conveying belt and the second-level conveying belt have the same rotating direction, the first-level conveying belt delivers the seedlings to the second-level conveying belt; the second-level conveying belt is horizontally installed, the first-level conveying belt is obliquely installed, and the included angle between the second-level conveying belt and the first-level conveying belt is 10-45 degrees; the first-level seedling uniformizing wheel and the second-level seedling uniformizing wheel are provided with seedling uniformizing teeth, the circumferences of the first-level seedling uniformizing wheel and the second-level seedling uniformizing wheel are equally divided into a plurality of sectors with a central angle θ, and the seedling uniformizing teeth are uniformly distributed along the sectors with the central angle θ; when the seedlings delivered by the first-level conveying belt are within two adjacent seedling uniformizing teeth, the first-level seedling uniformizing wheel rotates through at least one sector with the central angle θ; when the seedlings delivered by the second-level conveying belt are within two adjacent seedling uniformizing teeth, the second-level seedling uniformizing wheel rotates through at least one sector with the central angle θ. The seedling combing device comprises a seedling combing conveying belt and a seedling conveying belt, the seedling conveying belt is horizontally installed, the seedling combing conveying belt is obliquely installed, the included angle between the seedling conveying belt and the seedling combing conveying belt is 30-60 degrees, the seedling combing conveying belt and the seedling conveying belt rotate in opposite directions, the seedling combing speed of the seedling combing conveying belt is greater than the seedling conveying speed of the seedling conveying belt, the seedling combing teeth are uniformly and staggeredly arranged on the seedling combing conveying belt, the distance between two adjacent rows of seedling combing teeth is 100-130 mm, and the distance between two adjacent seedling combing teeth in the same row is 50-70 mm; the seedling combing speed of the seedling combing conveying belt is 0.7-2 m / s, and the seedling conveying speed of the seedling conveying belt is 1.5-5 mm / s.

[0006] In order to ensure the uniformity of the distribution of the seedlings in the field after the seedlings are thrown, in a further technical solution, the seedling conveying speed of the first-level conveying belt is lower than the repelling speed of the first-level seedling uniformizing wheel, and the ratio of the seedling conveying speed of the first-level conveying belt to the repelling speed of the first-level seedling uniformizing wheel is 1:3; the seedling conveying speed of the second-level conveying belt is lower than the repelling speed of the second-level seedling uniformizing wheel, and the ratio of the seedling conveying speed of the second-level conveying belt to the repelling speed of the second-level seedling uniformizing wheel is 1:3.

[0007] In order to ensure the uniformity of the distribution of the seedlings in the field after the seedlings are thrown, in a further technical solution, the installation height of the first-level seedling uniformizing wheel relative to the first-level conveying belt is 120-170 mm, and the installation height of the second-level seedling uniformizing wheel relative to the second-level conveying belt is 120-170 mm.

[0008] When the speed coordination of the seedling combing device, the first uniform seedling device and the second uniform seedling device is insufficient, the seedlings are prevented from being stacked on the first conveying belt. In a further technical solution, the included angle between the second conveying belt and the first conveying belt is 10 degrees.

[0009] The rice self-sequence seedling throwing machine has the advantages that: The seedling combing device and the uniform seedling device are used, and after seedling combing and secondary uniform seedling, when the first uniform seedling wheel contacts the seedlings, the seedlings are subjected to reverse force, and the excess seedlings are thrown back; the seedlings that do not contact the first uniform seedling wheel continue to move backward through the gap between the first conveying belt and the first uniform seedling wheel; when the second uniform seedling wheel contacts the seedlings, the seedlings are subjected to reverse force, and the excess seedlings are thrown back; the seedlings that do not contact the second uniform seedling wheel continue to move backward through the gap between the second conveying belt and the second uniform seedling wheel, so that the secondary uniform seedling is realized. The seedling combing device reduces the risk of seedling sticking, reduces the probability of seedling mechanical damage, improves the combing efficiency, and provides favorable conditions for subsequent secondary uniform seedling. The seedlings are subjected to the combined action of seedling combing and secondary uniform seedling to ensure the uniformity of field distribution after seedling throwing. The included angle between the second conveying belt and the first conveying belt is 10 degrees, and when the speed coordination of the seedling combing device, the first uniform seedling device and the second uniform seedling device is insufficient, the seedlings are prevented from being stacked on the first conveying belt. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the application and are incorporated herein in their entirety. The schematic embodiments of the application and their descriptions are used to explain the application and do not constitute an improper limitation on the application. In the drawings: Figure 1 It is a structure schematic diagram of the rice self-sequence seedling throwing machine of the application; Figure 2 It is a working principle schematic diagram of the rice self-sequence seedling throwing machine of the application; Figure 3 It is a structure schematic diagram of the seedling combing device of the application; Figure 1 It is a structure three-dimensional schematic diagram of the uniform seedling device of the application; Figure 4 It is a front view of the uniform seedling device of the application; Figure 3 It is a principle schematic diagram of the uniform seedling device of the application; Figure 5 It is a structure schematic diagram of the seedling combing device of the application. Figure 6 DETAILED DESCRIPTION Figure 1 It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0011] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in combination with the embodiments. ​

[0012] As Figure 1 and Figure 2 shown, the application prioritizes a rice self-sequence throwing seedling machine, which is provided with a rack 1 on a walking mechanism 6, a seedling bin 2, a combing device 3, a uniforming device 4, and a air blowing device 5 are installed on the rack 1, the combing device 3 is installed in the seedling bin 2, the combing device 3 combs the seedlings from the seedling bin 2 to the uniforming device 4, the uniforming device 4 delivers the seedlings to the air blowing device 5, and the seedlings are thrown into the air by the air blowing device 5, and since the seedlings have low center of gravity, the seedling matrix is always vertical downward before landing, ensuring that the planting quality meets the agronomic requirements.

[0013] As Figure 2 and Figure 3 and Figure 4 and Figure 5 shown, the uniforming device 4 includes a first uniforming device 40 and a second uniforming device 41, the first uniforming device 40 includes a first conveying belt 400 and a first uniforming wheel 401, the first uniforming wheel 401 is installed above the first conveying belt 400, the first conveying belt 400 and the first uniforming wheel 401 have the same rotating direction, the first uniforming wheel 401 exerts a reverse force on the seedlings when it contacts the seedlings, and the excess seedlings are pushed back, while the seedlings that do not contact the first uniforming wheel 401 continue to move backward through the gap between the first conveying belt 400 and the first uniforming wheel 401 and are delivered to the second uniforming device 41.

[0014] The second uniforming device 41 has the same structure as the first uniforming device 40, the second uniforming device 41 includes a second conveying belt 410 and a second uniforming wheel 411, the first conveying belt 400 and the second conveying belt 410 have the same rotating direction, and the first conveying belt 400 delivers the seedlings to the second conveying belt 410. The second uniforming wheel 411 is installed above the second conveying belt 410, the second conveying belt 410 and the second uniforming wheel 411 have the same rotating direction, the second uniforming wheel 411 exerts a reverse force on the seedlings when it contacts the seedlings, and the excess seedlings are pushed back, while the seedlings that do not contact the second uniforming wheel 411 continue to move backward through the gap between the second conveying belt 410 and the second uniforming wheel 411 and are delivered to the air blowing device 5. After two uniforming processes, the uniformity of the field distribution after throwing seedlings is further ensured.

[0015] As Figure 5As shown, due to the significant flexibility of rice seedlings, they undergo obvious mutual compression and deformation when piled up. Simultaneously, the high moisture content of the soil matrix makes them prone to adhesion, resulting in an excessively high coefficient of friction. Therefore, static guide baffles cannot effectively evenly distribute seedlings or control the conveying volume. Dynamic back-shaking for even distribution is an optimized solution. The primary even distribution wheel 401 and the secondary even distribution wheel 411 are collectively referred to as even distribution wheels. By setting the even distribution wheel height, the gap between the even distribution teeth 42, the conveyor belt speed, and the even distribution wheel transmission ratio, the back-shaking effect is optimized. When seedlings on the conveyor belt pass through the gap between the even distribution wheel and the conveyor belt, the even distribution wheel rotates, and the even distribution teeth 42 shake off the piled seedlings. Only seedlings with a pile height less than the height of the even distribution wheel can continue to be conveyed, simultaneously improving lateral uniformity and ensuring that the distribution of seedlings sent to the blowing device 5 is uniform and of reasonable density over a period of time.

[0016] The seedling distribution teeth 42 on the seedling distribution wheel are evenly distributed along the circumference, dividing the circumference of the seedling distribution wheel into several sectors with a central angle of θ. The seedling distribution device is projected onto the circumferential plane of the seedling distribution wheel. In order to achieve the seedling distribution effect, the seedling conveying speed should be lower than the seedling distribution wheel's return speed. It is also necessary to ensure that when the seedling conveying distance is within the range of two adjacent seedling distribution teeth 42, the seedling distribution wheel rotates through at least one sector to ensure that the seedling distribution teeth achieve the function of uniform return.

[0017] Therefore, the seedling conveying speed of the primary conveyor belt 400 is lower than the return speed of the primary seedling equalizer 401, and the ratio of the seedling conveying speed of the primary conveyor belt 400 to the return speed of the primary seedling equalizer 401 is 1:3; the seedling conveying speed of the secondary conveyor belt 410 is lower than the return speed of the secondary seedling equalizer 411, and the ratio of the seedling conveying speed of the secondary conveyor belt 410 to the return speed of the secondary seedling equalizer 411 is 1:3.

[0018] The primary seedling equalizing reel 401 and the secondary seedling equalizing reel 411 are equipped with seedling equalizing teeth 42, which divide the circumference of the primary seedling equalizing reel 401 and the secondary seedling equalizing reel 411 into several sectors with a central angle of θ. The seedling equalizing teeth 42 are evenly distributed along the sectors with a central angle of θ. When the seedlings are transported by the primary conveyor belt 400 within the range of two adjacent seedling equalizing teeth 42, the primary seedling equalizing reel 401 rotates through at least one sector. When the seedlings are transported by the secondary conveyor belt 410 within the range of two adjacent seedling equalizing teeth 42, the secondary seedling equalizing reel 411 rotates through at least one sector.

[0019] The installation height H of the primary seed-equalizing roller 401 relative to the primary conveyor belt 400 is 120~170mm, and the installation height H of the secondary seed-equalizing roller relative to the secondary conveyor belt is 120~170mm.

[0020] After testing, when the speed coordination of the seedling combing device 3, the primary seedling equalization device 40, and the secondary seedling equalization device 41 is insufficient, seedling accumulation will occur on the primary conveyor belt 400. By setting the installation angle of the primary conveyor belt 400, considering that too large an angle will prevent seedlings from continuing to be transported, and too small an angle will lead to excessive seedling flow exceeding the processing capacity of the next stage, the installation angle is set as the critical friction angle η, expressed as:

[0021] In the formula It is the static friction coefficient between the primary conveyor belt and the seedlings.

[0022] Since the main weight and contact area of ​​the seedlings come from the soil substrate, the coefficient of static friction between the soil and rubber is defined as 0.3 to 0.6. Through the primary seedling equalization device 40 and the secondary seedling equalization device 41, the seedlings are adjusted while being transported, resulting in a more uniform distribution. Therefore, the secondary conveyor belt 410 is installed horizontally, while the primary conveyor belt 400 is installed at an angle, with an angle of 10 degrees between the two belts.

[0023] like Figure 5 As shown, the seedling combing device 3 includes a seedling combing conveyor belt 31 and a seedling feeding conveyor belt 30. The seedling feeding conveyor belt 30 is installed horizontally, while the seedling combing conveyor belt 31 is installed at an angle. The angle between the seedling feeding conveyor belt 30 and the seedling combing conveyor belt 31 is 30 to 60 degrees. The seedling feeding conveyor belt 30 and the seedling combing conveyor belt 31 rotate in opposite directions. The seedling combing teeth 310 are evenly distributed and staggered on the seedling combing conveyor belt 31. The distance between two adjacent rows of seedling combing teeth 310 is 100 to 130 mm, and the distance between adjacent seedling combing teeth 310 in the same row is 50 to 70 mm. The seedling combing speed of the seedling combing conveyor belt 31 is 0.3 to 0.5 m / s, and the seedling conveying speed of the seedling feeding conveyor belt 30 is 2 to 5 mm / s.

[0024] The seedling conveyor belt 30 transports seedlings forward from the seedling bin 2, while the seedling combing conveyor belt 31 drives the combing teeth 310 to move continuously. When there is only one row of combing teeth 310 on the seedling combing conveyor belt 31, the cross-sectional area of ​​the combing volume from the start to the end of one combing cycle can be expressed as:

[0025] In the formula, S p This refers to the cross-sectional area of ​​the seedlings inside seedling tray 2, in meters. 2 t is the time from the start to the end of one combing operation with 310 comb teeth, measured in seconds (s); h 11 The height of the seedling tray is 2 meters; v 11 The speed of the rice seedling conveyor belt is 30 m / s.

[0026] The seedling combing conveyor belt 30 has a combination of seedling combing teeth 310 arranged with a spacing of α. The time interval between each row of seedling combing teeth 310 and the position of the first row of seedling combing teeth 310 on the seedling bin 2 side of the seedling combing conveyor belt 30 is:

[0027] In the formula, t x v is the time interval in seconds (s) for the x-th row of teeth to pass through position 310 of the first row of comb teeth; 12 The speed of the rice seedling conveyor belt is 31, in m / s.

[0028] The cross-sectional area of ​​a single row of 310 combing teeth during a single combing operation is:

[0029] The volume of a single stripping is: {V}_{p}={B}_{11}.\left [ {\int ^{t}_{0} {\frac {{h}_{11}{v}_{12}} {2}dt-\int ^{t-{t}_{1}}_{0} {\frac {({h}_{11}-{v}_{12}{t}_{1}){v}_{11}} {2}dt}..........-\int ^{t-{t}_{x}}_{0} {\frac {({h}_{11}-{v}_{12}{t}_{x}){v}_{11}} {2}dt}}} \right ]

[0030] In the formula, V p The volume of a single seedling combing is expressed in meters (m³). 3 B 11 This refers to the width of the seedling tray.

[0031] The self-propelled rice transplanter's walking speed v4 and transplanting width are both designed as adjustable parameters. The height h11 of the seedling bin 2 is 0.5m. The length L11 of the seedling delivery conveyor belt 30 is designed to be 2.36m, and the width B11 is designed to be 0.5m. The diameter D11 of the shaft of the seedling delivery conveyor belt 30 is 80mm. The length L12 of the combing conveyor belt is 2.5m, and the diameter D12 of the shaft of the combing conveyor belt is 60mm. Based on the agronomic requirements for the number of seedlings per acre, the seedling delivery speed range of the seedling delivery conveyor belt 30 can be calculated using a formula, as shown in the table.

[0032] Parameters Values Walking speed v0 / (m / s) [0,2] Width W / m [4,7] Number of seedlings per acre N / plant [18000,22000] Volume of seedling store Q / plant [76000,85000] Seedling delivery speed of seedling delivery belt 30 / (m / s) [0.0015,0.005] In-depth research into the working characteristics of the seedling combing device 3 revealed a significant correlation between its operating parameters and operational effectiveness: when the rotational speed of the seedling combing conveyor belt 31 is too high and the density of the combing teeth 310 is too large, the dynamic load on the mechanism will increase, significantly reducing mechanical reliability and increasing the probability of mechanical damage to seedlings; conversely, if the rotational speed is too low and the spacing between the combing teeth 310 is too large, the combing efficiency will decrease, seriously affecting the quality of the operation. Therefore, it is necessary to rationally design the parameters of the seedling combing device 3 and match the seedling feeding speed of the seedling feeding conveyor belt 30 to achieve seedling-free operation and prevent seedling damage. After testing, when the operating speed of the seedling feeding conveyor belt 30 is within the derived range, the combing speed of the seedling combing conveyor belt 31 is [0.7, 2] m / s, and the spacing α of the combing teeth 310 is [50, 70] cm, which meets the seedling combing requirements. On the seedling thrower, α is selected as 65 cm, and the combing teeth 310 are welded to the seedling combing conveyor belt 31 and arranged in a cross pattern with a spacing of 24 cm to further reduce the risk of seedling jamming. Calculations show that the volume of a single row of 310 seedling combs is [3.4×10-6, 1.14×10-5] m3, which can meet the requirements for the amount of seedlings planted per unit time.

[0033] The techniques not described above are common knowledge to those skilled in the art. The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rice self-sequential rice transplanter, comprising a seedling bin (2), a seedling combing device (3), a seedling equalization device (4), and an air supply device (5) mounted on a frame (1). The seedling combing device (3) is installed inside the seedling bin (2), and the seedling combing device (3) combs the seedlings from the seedling bin (2) to the seedling equalization device (4). The seedling equalization device (4) transports the seedlings to the air supply device (5), which then throws them into the air. The device is characterized in that... The seedling equalization device (4) includes a primary seedling equalization device (40) and a secondary seedling equalization device (41). The primary seedling equalization device (40) includes a primary conveyor belt (400) and a primary seedling equalization wheel (401). The primary seedling equalization wheel (401) is installed above the primary conveyor belt (400). The primary conveyor belt (400) and the primary seedling equalization wheel (401) rotate in the same direction. When the primary seedling equalization wheel (401) contacts the seedlings, it applies a reverse force to the seedlings, pushing back any excess seedlings. The secondary seedling equalization device (41) includes a secondary conveyor belt (410) and a secondary seedling equalization wheel (411). The secondary seedling equalization wheel (411) is installed above the secondary conveyor belt (410). The secondary conveyor belt (410) and the secondary seedling equalization wheel (411) rotate in the same direction. When the secondary seedling equalization wheel (411) contacts the seedlings, it applies a reverse force to the seedlings, pushing back any excess seedlings. The primary conveyor belt (400) and the secondary conveyor belt (410) rotate in the same direction. The primary conveyor belt (400) transports seedlings to the secondary conveyor belt (410). The secondary conveyor belt (410) is installed horizontally, while the primary conveyor belt (400) is installed at an angle. Seedling teeth (42) are installed on the primary seedling distribution wheel (400) and the secondary seedling distribution wheel (411), dividing the circumference of the primary seedling distribution wheel (401) and the secondary seedling distribution wheel (411) into several sectors with a central angle of θ. The seedling teeth (42) are evenly distributed along the sectors with a central angle of θ. When the seedling transport distance of the primary conveyor belt (400) is within two adjacent seedling teeth (42), the primary seedling distribution wheel (400) rotates through at least one sector with an angle of θ. When the seedling transport distance of the secondary conveyor belt (411) is within two adjacent seedling teeth (42), the secondary seedling distribution wheel (411) rotates through at least one sector with an angle of θ. The seedling combing device (3) includes a seedling combing conveyor belt (31) and a seedling delivery conveyor belt (30). The seedling delivery conveyor belt (30) is installed horizontally, and the seedling combing conveyor belt (31) is installed at an angle. The angle between the seedling delivery conveyor belt (30) and the seedling combing conveyor belt (31) is 30 to 60 degrees. The seedling delivery conveyor belt (30) and the seedling combing conveyor belt (31) rotate in opposite directions. The seedling combing speed of the seedling combing conveyor belt (31) is greater than the seedling delivery speed of the seedling delivery conveyor belt (30). The seedling combing teeth (310) are evenly distributed on the seedling combing conveyor belt (31). The distance between two adjacent rows of seedling combing teeth (310) is 100 to 130 mm, and the distance between adjacent seedling combing teeth (310) in the same row is 50 to 70 mm. The seedling combing speed of the seedling combing conveyor belt (31) is 0.7 to 2 m / s, and the seedling delivery speed of the seedling delivery conveyor belt (30) is 1.5 to 5 mm / s.

2. The rice self-sequential transplanter according to claim 1, characterized in that, The seedling conveying speed of the primary conveyor belt (400) is lower than the return speed of the primary seedling equalizer (401), and the ratio of the seedling conveying speed of the primary conveyor belt (400) to the return speed of the primary seedling equalizer (401) is 1:3; the seedling conveying speed of the secondary conveyor belt (410) is lower than the return speed of the secondary seedling equalizer (411), and the ratio of the seedling conveying speed of the secondary conveyor belt (410) to the return speed of the secondary seedling equalizer (411) is 1:

3.

3. The rice self-sequential transplanter according to claim 2, characterized in that, The installation height of the first-stage seed-equalizing wheel (401) relative to the first-stage conveyor belt (400) is 120~170mm, and the installation height of the second-stage seed-equalizing wheel (411) relative to the second-stage conveyor belt (410) is 120~170mm.

4. The rice self-sequential transplanter according to claim 1, characterized in that, The angle between the secondary conveyor belt (410) and the primary conveyor belt (400) is 10 degrees.

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