A rotary soil covering planter

Abstract

This invention provides a rotating soil-inserting planting device, including a soil-inserting mechanism and a rotating seedling guiding mechanism disposed on the soil-inserting mechanism. The rotating seedling guiding mechanism includes a movable plate, a receiving funnel passing through the movable plate, and a seedling guiding tube rotatably disposed at the lower end of the receiving funnel. The movable plate is provided with a rotating mechanism for driving the seedling guiding tube to rotate. Multiple duckbill plates are movably connected to the lower end of the seedling guiding tube, and the seedling guiding tube is provided with an opening and closing mechanism for driving the multiple duckbill plates to move closer or further apart. The multiple duckbill plates have a first state of mutual contact and a second state of separation. When the multiple duckbill plates are in the first state, they contact each other to form a conical sleeve. The conical sleeve has an outer shell and an inner shell, with an inner spiral protrusion between the outer shell and the inner shell. The outer wall of the outer shell has an outer spiral protrusion, and the inner wall of the inner shell has an annular protrusion near its lower end. This application, through the spiral conveying action of the inner spiral protrusion of the duckbill plates, can transport soil back into the conical sleeve to cover the substrate of the planted seedling, achieving seamless integration of roots and soil.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery engineering technology, and in particular to a rotary soil-inserting planting device. Background Technology

[0002] Transplanting is a crucial step in agricultural production. By cultivating strong seedlings in advance before transplanting them into the field, it can significantly extend the crop's growing season, enhance its resistance to adverse conditions, and thus increase crop yield and planting efficiency. It is widely used in the cultivation of vegetables, flowers, and other cash crops. With the advancement of agricultural mechanization and intelligentization, transplanters have become the core equipment for achieving large-scale transplanting. As the "end-efficiency unit" of the transplanter, the structural design and operational performance of the planter directly affect transplanting efficiency, planting quality, and seedling survival rate in the later stages. Therefore, it has become a key focus of transplanter research and optimization.

[0003] Currently, the planting systems of mainstream transplanters at home and abroad generally adopt a structural design that separates planting and soil covering. That is, the planting and soil covering actions are completed by two independent functional units: one is the planting unit, which mostly uses a duckbill-type planter, and the soil hole is opened and the seedling is placed by opening and closing the duckbill; the other is the soil covering unit, which requires a separate soil covering wheel, soil covering plate or soil covering plow plate, etc., to be set behind the planting unit, and the soil is covered to the planting hole by rolling, scraping and pushing.

[0004] This separate design has certain technical flaws. The core issue lies in the extremely high degree of coordination required between the planting unit and the soil covering unit: they must be highly matched in both time and space. If the matching precision is insufficient, problems such as untimely or uneven soil covering can easily occur, leading to poor contact between the seedling roots and the soil, creating voids, resulting in root entrapment or seedling death due to drought. In the normal process of inserting the duckbill planter into the soil, the hole is opened by squeezing. After the duckbill is inserted into the soil, it squeezes the surrounding soil to form a smooth, hard, and sealed hole wall. This hole wall forms a physical barrier with the surrounding loose soil, increasing the difficulty for the seedling roots to extend into the surrounding soil and severely hindering root extension and the normal exchange of water, air, and nutrients. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a rotating soil-covering planting device to solve the problems of poor coordination, untimely and uneven soil covering, and the formation of hole walls when the duckbill is pressed into the soil in the prior art of planting and soil-covering separation transplanting equipment.

[0006] The technical solution adopted by this invention to solve the above-mentioned technical problems is: a rotating soil-inserting planting device, comprising a soil-inserting mechanism and a rotating seedling guiding mechanism disposed on the soil-inserting mechanism. The soil-inserting mechanism is used to drive the rotating seedling guiding mechanism to move up and down. The rotating seedling guiding mechanism includes a moving plate, a receiving funnel passing through the moving plate, and a seedling guiding tube rotatably disposed at the lower end of the receiving funnel. The moving plate is provided with a rotating mechanism for driving the seedling guiding tube to rotate. A plurality of duckbill pieces are movably connected to the lower end of the seedling guiding tube. The seedling guiding tube is provided with an opening and closing mechanism for driving the plurality of duckbill pieces to move closer or further apart. The plurality of duckbill pieces have a first state of moving closer and abutting each other and a second state of moving closer and abutting each other. In the second separated state, when the multiple duckbill plates are in the first state, they abut against each other to form a conical sleeve with the larger end facing upwards and the smaller end facing downwards. The conical sleeve has an outer shell and an inner shell, with an inner spiral protrusion between the outer shell and the inner shell. The outer wall of the outer shell has an outer spiral protrusion, and the inner wall of the inner shell has an annular protrusion near its lower end. The annular protrusion is used to support the planted seedling and is composed of multiple arc-shaped protrusion units. When the multiple duckbill plates are in the first state, the multiple arc-shaped protrusion units form the annular protrusion to support the planted seedling. When the multiple duckbill plates are in the second state, the multiple arc-shaped protrusion units separate from each other so that the planted seedling can fall off.

[0007] Furthermore, the duckbill plate includes an outer plate and an inner plate connected to the outer plate. The height of the outer plate is higher than that of the inner plate, and a flow space for soil passage is formed between the outer plate and the inner plate. An inner spiral unit is also provided between the outer plate and the inner plate. An outer spiral unit is provided on the outer wall of the outer plate, and an arc-shaped protrusion unit is provided on the inner wall of the inner plate near its lower end. When multiple duckbill plates are in the first state, multiple outer spiral units abut against each other to form an outer spiral protrusion, multiple outer plates abut against each other to form an outer shell, multiple inner spiral units abut against each other to form an inner spiral protrusion, and multiple inner plates abut against each other to form an inner shell.

[0008] Furthermore, the soil-insertion mechanism includes a fixed plate, a lead screw rotatably mounted on the fixed plate, and a guide roller mounted on the fixed plate. The fixed plate is equipped with a soil-insertion motor for driving the lead screw to rotate. The guide roller passes through the fixed plate and slides with the fixed plate, while the lead screw passes through the fixed plate and is threaded with the fixed plate.

[0009] Furthermore, the receiving funnel includes a conical seedling receiving part and a sleeve part located at the lower end of the conical part, and the seedling guide tube is rotatably connected to the sleeve part through a bearing.

[0010] Furthermore, the seedling guide tube includes an annular connecting part, a conical connecting part, and a seedling guiding part connected sequentially from top to bottom. The annular connecting part is sleeved on the outside of the sleeve part and is rotatably connected to the sleeve part through a bearing. An external gear part is provided on the outside of the annular connecting part. A rotary motor is provided on the moving plate. The output shaft end of the rotary motor is provided with a transmission gear that meshes with the external gear part.

[0011] Furthermore, a duckbill opening and closing ring is slidably sleeved on the outer side of the seedling guide. The outer piece of the duckbill piece is movably connected to the duckbill opening and closing ring and the seedling guide through the first connector and the second connector, respectively. The seedling guide is also provided with a driving mechanism, which is used to drive the duckbill opening and closing ring to move up and down, so as to realize the switching of multiple duckbill pieces between the first state and the second state.

[0012] Furthermore, an annular limiting part is provided on the outer wall of the seedling guide near its lower end. When the multiple duckbill pieces are in the first state, the lower end of the duckbill opening and closing ring abuts against the annular limiting part. When the multiple duckbill pieces are in the second state, the lower end of the duckbill opening and closing ring separates from the annular limiting part.

[0013] Furthermore, the drive mechanism includes an opening and closing control plate disposed on the duckbill opening and closing ring and an electric push rod disposed on the outer wall of the seedling guide. The opening and closing control plate is arc-shaped, and a positioning rod is provided at the upper end of the opening and closing control plate. The piston rod end of the electric push rod is connected to the positioning rod.

[0014] Furthermore, the drive mechanism includes an opening and closing control plate disposed on the duckbill opening and closing ring and an opening and closing motor disposed on the outer wall of the seedling guide. The output shaft end of the opening and closing motor is provided with a spatial cam, and a sliding groove extending in the vertical direction is provided on the spatial cam. The opening and closing control plate is arc-shaped, and a positioning rod is provided at the upper end of the opening and closing control plate. A sliding shaft is provided at the end of the positioning rod perpendicular to it, and a pulley is provided at the end of the sliding shaft. The pulley is slidably disposed along the extension direction of the sliding groove.

[0015] Furthermore, when the seedling falls into the inner shell and comes into contact with the annular protrusion, there is a gap between the substrate of the seedling and the inner shell.

[0016] The beneficial effects of this application are as follows: 1. This application transforms the traditional "compression hole opening" into "cutting hole opening". Through the cutting and breaking action of the outer spiral protrusion on the soil, the compaction of the soil around the hole is reduced, avoiding the formation of a smooth and hard hole wall. The seedling roots can extend laterally more easily, while also ensuring the normal exchange of water, air and nutrients between the roots and the outside world. 2. Before the seedlings are planted in the field, this application uses the spiral conveying action of the inner spiral protrusion to transport the soil back into the conical sleeve to cover the substrate of the seedlings, achieving a seamless combination of roots and soil, and avoiding the phenomena of voids, root entrapment, or seedling death due to uneven soil covering.

[0017] 3. This application is particularly applicable to soil operations with excessive moisture, such as clay, and solves the technical problem of easily forming closed hole walls in such soil environments, transforming the transplanting process from "passively adapting to the damaged soil" to "actively constructing an ideal initial growth environment for seedlings".

[0018] 4. The annular protrusion of this application is composed of multiple arc-shaped protrusion units. When multiple duckbill pieces are in the first state, the annular protrusion forms a complete support ring, which can reliably support the substrate of the seedling and ensure that the seedling remains stable and does not fall during the process of the planter quickly entering the soil. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the soil-inserting mechanism in this invention.

[0021] Figure 3 This is a schematic diagram of the rotating seedling guide mechanism in this invention.

[0022] Figure 4 This is a cross-sectional view of the rotating seedling guide mechanism in this invention.

[0023] Figure 5 This is a schematic diagram of the structure of multiple duckbill plates in the first state in this invention.

[0024] Figure 6 This is a schematic diagram of the structure of multiple duckbill plates in the second state in this invention.

[0025] Figure 7 This is a cross-sectional view of the conical sleeve in this invention.

[0026] Figure 8 This is a schematic diagram of the structure of the duckbill plate in this invention.

[0027] Figure 9 This is a schematic diagram of the rotating soil insertion structure in this invention.

[0028] Illustration markings: 1. Soil-inserting mechanism; 101. Fixing plate; 102. Soil-inserting motor; 103. Photoelectric sensor; 104. Guide roller; 105. Lead screw; 2. Rotary seedling guiding mechanism; 201. Rotary motor; 202. Transmission gear; 203. External gear section; 204. Moving plate; 205. Receiving funnel; 206. Inner upper shoulder; 207. Annular baffle; 208. Outer upper shoulder; 209. Bearing; 3. Seedling guide tube 301. Annular connecting part; 302. Conical connecting part; 303. Seedling guide part; 304. Annular limiting part; 4. Duckbill piece; 401. Opening and closing motor; 402. Spatial cam; 403. Opening and closing control plate; 404. Duckbill opening and closing ring; 405. First connecting piece; 406. Second connecting piece; 41. Outer piece; 42. Outer spiral unit; 43. Inner piece; 431. Arc-shaped protrusion unit; 44. Inner spiral unit; 5. Planting seedling. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that, in the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Please see Figure 1-9 As shown, this embodiment of the invention provides a rotating soil-inserting planting device, including a soil-inserting mechanism 1 and a rotating seedling guiding mechanism 2 disposed on the soil-inserting mechanism 1. The soil-inserting mechanism 1 is used to drive the rotating seedling guiding mechanism 2 to move up and down. The rotating seedling guiding mechanism 2 includes a moving plate 204, a receiving funnel 205 passing through the moving plate 204, and a seedling guiding tube 3 rotatably disposed at the lower end of the receiving funnel 205. The moving plate 204 is provided with a rotating mechanism for driving the seedling guiding tube 3 to rotate. A plurality of duckbill pieces 4 are movably connected to the lower end of the seedling guiding tube 3. The seedling guiding tube 3 is provided with an opening and closing mechanism for driving the plurality of duckbill pieces 4 to move closer or further apart from each other. The plurality of duckbill pieces 4 have a first state of being close to and abutting each other and a second state of being separated from each other. The plurality of duckbill pieces 4 are in the first state. In the first state, multiple duckbill plates 4 abut against each other to form a conical sleeve with the large end facing up and the small end facing down. The conical sleeve has an outer shell and an inner shell, with an inner spiral protrusion between the outer shell and the inner shell. The outer wall of the outer shell has an outer spiral protrusion, and the inner wall of the inner shell has an annular protrusion near its lower end. The annular protrusion is used to support the planted seedling 5. The annular protrusion is composed of multiple arc-shaped protrusion units 431. When the multiple duckbill plates 4 are in the first state, the multiple arc-shaped protrusion units 431 form an annular protrusion to support the planted seedling 5. When the multiple duckbill plates 4 are in the second state, the multiple arc-shaped protrusion units 431 separate from each other so that the planted seedling 5 can fall. When the planted seedling 5 falls into the inner shell and abuts against the annular protrusion, there is a gap between the substrate of the planted seedling 5 and the inner shell.

[0031] The duckbill plate 4 includes an outer plate 41 and an inner plate 43 connected to the outer plate 41. The height of the outer plate 41 is higher than the height of the inner plate 43. A flow space for soil passage is formed between the outer plate 41 and the inner plate 43. An inner spiral unit 44 is also provided between the outer plate 41 and the inner plate 43. An outer spiral unit 42 is provided on the outer wall of the outer plate 41. The outer spiral unit 42 includes multiple outer spiral sub-units. The lengths of the multiple outer spiral sub-units decrease from top to bottom along the length direction of the outer plate 41. An arc-shaped protrusion unit 431 is provided on the inner wall of the inner plate 43 and near its lower end. When the multiple duckbill plates 4 are in the first state, the multiple outer spiral units 42 abut against each other to form an outer spiral protrusion. The multiple outer plates 41 abut against each other to form a shell. The multiple inner spiral units 44 abut against each other to form an inner spiral protrusion. The inner spiral unit 44 includes multiple inner spiral sub-units. The lengths of the multiple inner spiral sub-units decrease from top to bottom along the length direction of the inner plate 43. The multiple inner plates 43 abut against each other to form an inner shell.

[0032] Combination Figure 1 and Figure 2 As shown, the soil-inserting mechanism 1 includes a fixed plate 102, a lead screw 105 rotatably mounted on the fixed plate 102, and a guide roller 104 mounted on the fixed plate 102. The fixed plate 102 is equipped with a soil-inserting motor 101 for driving the lead screw 105 to rotate. The guide roller 104 passes through the fixed plate 102 and is slidably engaged with it. The lead screw 105 passes through the fixed plate 102 and is threadedly engaged with it. The guide roller 104 has first support plates at both ends, which are fixedly connected to the fixed plate 102. The lead screw 105 is rotatably mounted between two second support plates, with one end of the lead screw 105 rotatably passing through a second support plate and connecting to the output shaft of the soil-inserting motor 101. The second support plates are welded to the fixed plate 102. The soil-inserting motor 101 drives the lead screw 105 to rotate, and under the action of the guide roller 104, it drives the moving plate 204 to move up and down.

[0033] Combination Figure 3 and Figure 4 As shown, the receiving funnel 205 includes a conical seedling receiving part and a sleeve part located at the lower end of the conical part. The seedling guide tube 3 is rotatably connected to the sleeve part via a bearing 209. The seedling guide tube 3 includes an annular connecting part 301, a conical connecting part 302, and a seedling guide part 303 connected sequentially from top to bottom. The annular connecting part 301 is fitted onto the outside of the sleeve part and is rotatably connected to the sleeve part via a bearing 209. An external gear part 203 is provided on the outside of the annular connecting part 301. A rotary motor 201 is provided on the moving plate 204. The output shaft end of the rotary motor 201 is provided with a transmission gear 202 that meshes with the external gear part 203. The rotary motor 201 drives the transmission gear 202 to rotate. Since the transmission gear 202 meshes with the external gear part 203, it drives the seedling guide tube 3 to rotate, which in turn drives the multiple duckbill plates 4 below to rotate.

[0034] Bearing 209 is an angular contact ball bearing. An annular mounting part is provided on the outer wall of the sleeve. The inner ring of bearing 209 is fitted on the sleeve and the lower end of the inner ring of bearing 209 abuts against the annular mounting part. The seedling guide tube 3 is provided with a stepped groove that mates with the outer ring of bearing 209. The upper end of the outer ring of bearing 209 is provided with an annular outer upper end shoulder 208. The upper end of the seedling guide tube 3 is provided with an annular baffle 207, which is located above the outer upper end shoulder 208. The outer side of the sleeve is fitted with an annular inner upper end shoulder 206, which is located between the inner ring of bearing 209 and the moving plate 204.

[0035] Combination Figure 1 and Figure 5 As shown, a duckbill opening and closing ring 404 is slidably sleeved on the outer side of the seedling guide 303. The outer piece 41 of the duckbill piece 4 is movably connected to the duckbill opening and closing ring 404 and the seedling guide 303 through a first connector 405 and a second connector 406, respectively. The first connector 405 is an upper connecting rod hinged to the outer piece 41, and the other end of the upper connecting rod is hinged to the duckbill opening and closing ring 404. The second connector 406 is a lower connecting rod mounted on the outer piece 41, and the free end of the lower connecting rod is hinged to the seedling guide tube 3. The seedling guide 303 is also provided with a driving mechanism, which is used to drive the duckbill opening and closing ring 404 to move up and down, so as to realize the switching of multiple duckbill pieces 4 between the first state and the second state. The seedling guide 303 has an annular limiting part 304 near its lower end on its outer wall. When the multiple duckbill pieces 4 are in the first state, the lower end of the duckbill opening and closing ring 404 abuts against the annular limiting part 304. When the multiple duckbill pieces 4 are in the second state, the lower end of the duckbill opening and closing ring 404 separates from the annular limiting part 304. It should be noted that the parts not described in detail in this application are all prior art.

[0036] Specifically, the drive mechanism includes an opening and closing control plate 403 mounted on the duckbill opening and closing ring 404 and an opening and closing motor 401 mounted on the outer wall of the seedling guide section 303. The output shaft end of the opening and closing motor 401 is provided with a spatial cam 402. The spatial cam 402 is provided with a sliding groove extending in the vertical direction. The opening and closing control plate 403 is arc-shaped. The upper end of the opening and closing control plate 403 is provided with a positioning rod. The end of the positioning rod is provided with a sliding shaft perpendicular to it. The end of the sliding shaft is provided with a pulley. The pulley is slidably mounted along the extension direction of the sliding groove.

[0037] Of course, the present invention is not limited to the embodiments described above. Several other embodiments based on the design concept of the present invention are also provided below.

[0038] For example, in other embodiments, unlike the embodiments described above, the driving mechanism includes an opening and closing control plate 403 disposed on the duckbill opening and closing ring 404 and an electric push rod disposed on the outer wall of the seedling guide part 303. The opening and closing control plate 403 is arc-shaped, and a positioning rod is provided at the upper end of the opening and closing control plate 403. The piston rod end of the electric push rod is connected to the positioning rod.

[0039] The system also includes a controller, which comprises a PLC controller. The arc-shaped protrusion unit 431 has a groove, and a pressure sensor is installed in one of the grooves on the multiple arc-shaped protrusion units 431. When the seedling 5 contacts the annular protrusion, the pressure sensor contacts the substrate at the lower end of the seedling 5. A photoelectric sensor 103 is also installed on the fixing plate 102. The controller is electrically connected to the soil-inserting motor 101, the opening / closing motor 401, the pressure sensor, and the photoelectric sensor 103.

[0040] When the duckbill planter is at its highest position, the seedling 5 enters the seedling guide tube 3 under the action of the receiving funnel 205. After being unloaded by the conical connecting part 302 of the seedling guide tube 3, the seedling 5 falls through the seedling guide part 303 into the conical sleeve formed by multiple duckbill plates 4. The substrate at the bottom of the seedling 5 is supported by the radially extending annular protrusion inside the inner shell. The soil-inserting motor 101 rotates, causing the rotating seedling guide mechanism 2 and the seedling guide tube 3 to move downwards together. During this downward movement, the moving plate 204 passes the photoelectric sensor 103 once. At the same time, the rotating motor 201 drives the transmission gear 202 to rotate. Through meshing with the external gear 203, the rotational motion is transmitted to the seedling guide tube 3. Due to the presence of the angular contact ball bearing 209 inside the seedling guide tube 3, the receiving funnel 205 will not rotate, while the seedling guide tube 3 and its lower part will rotate. The rotational motion is finally transmitted to the closed multiple duckbill plates 4. At this time, the duckbill plates 4 have both rotational and up-and-down motion. The outer spiral protrusions of the duckbill plates 4 cut the soil and break up the clay to a certain extent.

[0041] As the lower duckbill structure gradually rotates and enters the soil, the inner spiral protrusions inside the conical sleeve begin to interact with the soil, performing a spiral transport function. Once the soil enters the conical sleeve, the rotational motion of the inner spiral protrusions propels the soil upwards along a pre-set spiral path. The soil transport channel is formed by the gap between the inner spiral unit 44 of the duckbill plate 4 and the inner plate 43. This structure ensures that the soil maintains a certain directionality during the spiral propulsion process. As the conical sleeve continues to rotate and enter the soil, the soil moves upwards through this transport channel until it is transported to the set height. At this point, due to the conical structure inside the conical sleeve, the soil, guided by the conical space after reaching the end of the transport, naturally flows towards the central area inside the inner plate 43 and eventually covers the planted seedling 5 inside the conical sleeve. During this stage, the planted seedling 5 has not yet been released and remains stably inside the conical sleeve. A pressure sensor is used to monitor the changes in soil weight inside the conical sleeve in real time. The signal collected by the pressure sensor 307 reflects the increase in soil weight inside the inner plate 43 during each opening and closing of the duckbill. Only when the increment exceeds a preset threshold and remains stable for a certain period of time will the controller determine that the soil is fully covered, and the soil-planting motor 101 will reverse. As the amount of soil in the inner plate 43 increases to the increment of the signal emitted by the pressure sensor 307 and continues to exceed the predetermined increment, the pressure sensor 307 will emit a signal, and the soil-planting motor 101 will reverse. After the soil-planting motor 101 reverses, the duckbill rotating mechanism 2 and the conical sleeve move upward together, and a planting hole is formed below.

[0042] When the moving plate 204 passes the photoelectric sensor 103 again, the opening and closing motor 401 starts to rotate, driving the space cam 402 below to rotate. The space cam 402 drives the opening and closing control plate 403 to move vertically upward. The opening and closing control plate 403 drives the duckbill opening and closing ring 404 to move vertically upward, finally causing the four duckbill pieces 4 to separate, releasing the seedling 5 and the soil above it. The seedling 5 and the soil above it fall into the planting hole, completing the soil covering and planting.

[0043] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A rotating, soil-inserting, soil-covering planting device, characterized in that, It includes a soil-insertion mechanism (1) and a rotating seedling guide mechanism (2) set on the soil-insertion mechanism (1). The soil-insertion mechanism (1) is used to drive the rotating seedling guide mechanism (2) to move up and down. The rotating seedling guide mechanism (2) includes a moving plate (204), a receiving funnel (205) passing through the moving plate (204), and a seedling guide tube (3) rotatably set at the lower end of the receiving funnel (205). The moving plate (204) is provided with a rotating mechanism for driving the seedling guide tube (3) to rotate. Multiple duckbill pieces (4) are movably connected to the lower end of the seedling guide tube (3). The seedling guide tube (3) is provided with an opening and closing mechanism for driving the multiple duckbill pieces (4) to move closer or further away from each other. Multiple duckbill pieces (4) have a first state of mutual contact and a second state of mutual separation. When the multiple duckbill pieces (4) are in the first state, they form a conical sleeve by contacting each other. The large end of the conical sleeve faces upward and the small end faces downward. The conical sleeve has an outer shell and an inner shell. An inner spiral protrusion is provided between the outer shell and the inner shell. An outer spiral protrusion is provided on the outer wall of the outer shell. An annular protrusion is provided on the inner wall of the inner shell near its lower end. The annular protrusion is used to support the seedling (5). The annular protrusion is composed of multiple arc-shaped protrusion units (431). When the multiple duckbill pieces (4) are in the first state, the multiple arc-shaped protrusion units (431) form an annular protrusion to support the seedling (5). When the multiple duckbill pieces (4) are in the second state, the multiple arc-shaped protrusion units (431) separate from each other so that the seedling (5) can fall off.

2. The rotary soil-inserting planting device according to claim 1, characterized in that, The duckbill plate (4) includes an outer plate (41) and an inner plate (43) connected to the outer plate (41). The height of the outer plate (41) is higher than the height of the inner plate (43). A flow space for soil passage is formed between the outer plate (41) and the inner plate (43). An inner spiral unit (44) is also provided between the outer plate (41) and the inner plate (43). An outer spiral unit (42) is provided on the outer wall of the outer plate (41). An arc-shaped protrusion unit (431) is provided on the inner wall of the inner plate (43) and close to its lower end. When multiple duckbill plates (4) are in the first state, multiple outer spiral units (42) abut against each other to form an outer spiral protrusion, multiple outer plates (41) abut against each other to form an outer shell, multiple inner spiral units (44) abut against each other to form an inner spiral protrusion, and multiple inner plates (43) abut against each other to form an inner shell.

3. The rotating soil-inserting planting device according to claim 2, characterized in that, The soil-insertion mechanism (1) includes a fixed plate (102), a lead screw (105) rotatably mounted on the fixed plate (102), and a guide roller (104) mounted on the fixed plate (102). The fixed plate (102) is provided with a soil-insertion motor (101) for driving the lead screw (105) to rotate. The guide roller (104) passes through the fixed plate (102) and is slidably engaged with the fixed plate (102). The lead screw (105) passes through the fixed plate (102) and is threadedly engaged with the fixed plate (102).

4. The rotating soil-inserting planting device according to claim 2, characterized in that, The receiving funnel (205) includes a conical seedling receiving part and a sleeve part located at the lower end of the conical part. The seedling guide tube (3) is rotatably connected to the sleeve part through a bearing (209).

5. A rotating, soil-inserting, soil-covering planting device according to claim 4, characterized in that, The seedling guide tube (3) includes an annular connecting part (301), a conical connecting part (302) and a seedling guide part (303) connected from top to bottom. The annular connecting part (301) is sleeved on the outside of the sleeve part and is rotatably connected to the sleeve part through a bearing (209). An external gear part (203) is provided on the outside of the annular connecting part (301). A rotary motor (201) is provided on the moving plate (204). The output shaft end of the rotary motor (201) is provided with a transmission gear (202) that meshes with the external gear part (203).

6. A rotating, soil-inserting, soil-covering planting device according to claim 5, characterized in that, The seedling guide (303) is slidably fitted with a duckbill opening and closing ring (404) on its outer side. The outer piece (41) of the duckbill piece (4) is movably connected to the duckbill opening and closing ring (404) and the seedling guide (303) respectively through the first connector (405) and the second connector (406). The seedling guide (303) is also provided with a driving mechanism, which is used to drive the duckbill opening and closing ring (404) to move up and down, so as to realize the switching of multiple duckbill pieces (4) between the first state and the second state.

7. A rotating, soil-inserting, soil-covering planting device according to claim 6, characterized in that, The seedling guide (303) has an annular limiting part (304) near its lower end on its outer wall. When the multiple duckbill pieces (4) are in the first state, the lower end of the duckbill opening and closing ring (404) abuts against the annular limiting part (304). When the multiple duckbill pieces (4) are in the second state, the lower end of the duckbill opening and closing ring (404) separates from the annular limiting part (304).

8. A rotating, soil-inserting, soil-covering planting device according to claim 6, characterized in that, The driving mechanism includes an opening and closing control plate (403) set on the duckbill opening and closing ring (404) and an electric push rod set on the outer wall of the seedling guide (303). The opening and closing control plate (403) is arc-shaped, and a positioning rod is provided at the upper end of the opening and closing control plate (403). The piston rod end of the electric push rod is connected to the positioning rod.

9. A rotating, soil-inserting, soil-covering planting device according to claim 6, characterized in that, The drive mechanism includes an opening and closing control plate (403) set on the duckbill opening and closing ring (404) and an opening and closing motor (401) set on the outer wall of the seedling guide (303). The output shaft end of the opening and closing motor (401) is provided with a spatial cam (402). The spatial cam (402) is provided with a sliding groove extending in the vertical direction. The opening and closing control plate (403) is arc-shaped. The upper end of the opening and closing control plate (403) is provided with a positioning rod. The end of the positioning rod is provided with a sliding shaft set perpendicular to it. The end of the sliding shaft is provided with a pulley. The pulley is slidably set along the extension direction of the sliding groove.

10. A rotating, soil-inserting, soil-covering planting device according to claim 6, characterized in that, When the seedling (5) falls into the inner shell and comes into contact with the annular protrusion, there is a gap between the substrate of the seedling (5) and the inner shell.

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