A film mulching and seedling transplanting machine suitable for paddy fields with root stubbles and straws

Abstract

The application discloses a film mulching and seedling transplanting machine suitable for a paddy field containing stubble and straw, which comprises a seedling transplanting machine beam, a film hanging roller, a film pressing device, an edge pressing device and a film cutting device, a seedling box and a separate planting mechanism are arranged between the film pressing device and the film cutting device, a grass pressing mechanism capable of burying the stubble and the straw below the seedling transplanting depth is arranged below the film hanging roller, the grass pressing mechanism comprises a fixed shaft, a grass pressing roller is rotatably arranged on the fixed shaft, a plurality of axially arranged openings are formed in the circumferential direction of the surface of the grass pressing roller, and a grass pressing piece capable of radially extending and contracting is arranged at the openings correspondingly; a leveling device is arranged behind the grass pressing mechanism. The film mulching and seedling transplanting machine can bury the stubble and the straw remaining on the surface of the paddy field below the seedling transplanting depth before film laying operation, so that the nutritional value of the stubble and the straw is well reserved, and the quality of subsequent film laying operation and punching and seedling transplanting operation of the film mulching and seedling transplanting machine is improved.

Description

Technical Field

[0001] This invention relates to the field of mulched rice transplanter technology, specifically a mulched rice transplanter suitable for paddy fields containing stubble and straw. Background Technology

[0002] To effectively suppress weed growth during rice plant development and increase rice yield and quality, the current common practice is to lay biodegradable film in the paddy field before transplanting, followed by punching holes in the film and transplanting the rice seedlings. To improve the efficiency and quality of rice mulching operations, machines equipped with film-hanging and pressing mechanisms have been developed for traditional rice transplanters, achieving integrated rice mulching and transplanting operations.

[0003] For example, patent publication number CN 104137688 A discloses a high-speed rice transplanter with strip seedling mulching, including a chassis and a suspension frame mounted on the chassis, as well as a transplanting mechanism and a seedling box attached to the suspension frame. The frame of the mulching device is installed below the suspension frame. A paper film roller is rotatably arranged in the front of the frame, and a mulching roller group is rotatably arranged below and behind the paper film roller. The mulching roller group is symmetrically arranged in the left and right directions along the longitudinal center line. A film pressing side roller is symmetrically and rotatably arranged on both sides of the frame, and a film support frame is attached to the lower edge of the mulching roller group and the film pressing side roller. By setting a mulching device on the high-speed rice transplanter, the integrated mechanized operation of mulching and transplanting is realized, solving the problems of high labor intensity and high production cost of mulching and manual transplanting in separate operations.

[0004] However, rice paddies generally contain straw and stubble from the previous season's crops. The tilling process before rice planting cannot turn all the straw and stubble into the soil. Therefore, a lot of straw and stubble will remain on the surface of the rice paddy. When the mulched rice transplanter is performing the mulching transplanting operation, the straw and stubble remaining on the surface of the rice paddy will affect the flatness of the mulching operation, which will also affect the subsequent hole drilling and transplanting operations, leading to "missed transplanting" and "floating seedlings". In addition, the seedlings planted by the mulched rice transplanter may come into contact with the straw and stubble during the transplanting operation, which will increase the damage to the seedling stems or roots, thus increasing the rate of seedling damage.

[0005] Currently, there are machines that can clean the surface of paddy fields of straw and stubble before the mulched rice transplanter starts working. Although this can increase the working efficiency of the mulched rice transplanter, it removes the straw and stubble from the paddy field. Many studies have shown that the yield of rice is greater in the presence of the previous season's straw and stubble than in the absence of straw and stubble. Therefore, we urgently need a mulched rice transplanter suitable for paddy fields containing straw and stubble. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects and shortcomings of the existing technology and provide a mulched rice transplanter suitable for paddy fields containing stubble and straw, thus solving various problems existing in the existing technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A mulched rice transplanter suitable for paddy fields containing stubble and straw includes a transplanter beam. A film-hanging roller is fixed to the front of the transplanter beam via a mounting frame. A film-pressing device, an edge-pressing device, and a film-cutting device that cooperate with the film-hanging roller are connected to the rear of the transplanter beam via a bracket. A seedling box and a separating mechanism are provided between the film-pressing device and the film-cutting device. Below the film-hanging roller is a straw-pressing mechanism that can bury the stubble and straw below the transplanting depth. The straw-pressing mechanism includes a fixed shaft, on which a straw-pressing roller is rotatably mounted. The surface of the straw-pressing roller has several axially arranged openings in the circumferential direction. Each opening is respectively provided with a straw-pressing plate that can move radially. The inner side of the straw-pressing plate is connected to the outer surface of the fixed shaft of the straw-pressing roller by a connecting assembly. There are multiple sets of connecting assemblies, which are spaced apart along the axial direction.

[0009] A leveling device is installed at the rear of the grass pressing mechanism.

[0010] Both sides of the rice transplanter's crossbeam are fixedly connected to a square tube. A film-hanging roller is provided at the bottom of the square tube. Both ends of the film-hanging roller are fixedly connected to a connecting plate. The connecting plate and the square tube above are connected and fixed through an adjustable telescopic mechanism.

[0011] The telescopic mechanism includes a screw rod, which is threadedly connected to the square tube through a screw sleeve. A handle is fixedly connected to the top of the screw rod, and the bottom of the screw rod passes through the connecting plate and is threadedly connected to a screw sleeve installed in the connecting plate. The screw sleeve is fixedly connected to the connecting plate, and limit plates are symmetrically connected to the top of each connecting plate. The top of the limit plates passes through the square tube.

[0012] The connecting assembly includes multiple fixed rods sequentially mounted on a fixed shaft. Cam tracks are provided between the ends of adjacent fixed rods. Multiple rollers are clamped in the inner circumferential direction between the cam tracks. Each roller is provided with a connecting seat on its outer side. The connecting seat is movably connected to both ends of the central shaft of the roller. Sliding mechanisms are provided between the two sides of the connecting seat and the cam tracks. A connecting rod is fixedly connected to the top of each connecting seat. The top of each connecting rod is fixedly connected to the straw pressing sheet (14).

[0013] The sliding mechanism includes a slide rail and pulleys. Slide rails are provided on both outer sides of the cam track, and pulleys are connected to both sides of the connecting seat through connecting rods. The pulleys are matched with the slide rails.

[0014] A limiting mechanism is provided between the end of the grass pressing sheet and the grass pressing roller. The limiting mechanism includes a limiting hole and a limiting block. Limiting blocks are fixedly connected to both sides of the grass pressing sheet, and limiting holes are opened on both sides of the opening. The limiting holes match the limiting blocks.

[0015] The surface of each grass pressing roller is fixedly connected with several grass pressing rings that are spaced apart. The grass pressing rings are distributed at the ends of the grass pressing roller and at the spatial positions of adjacent grass pressing plates.

[0016] The grass pressing mechanism consists of two sets arranged side by side, with the circumferential angles of the grass pressing plates in the front and rear grass pressing mechanisms being staggered.

[0017] The leveling device includes a auger roller and a leveling roller arranged sequentially behind the straw pressing mechanism. The auger roller is used to transport mud from both sides to the middle. It includes a rotating shaft with two symmetrical spiral conveying blades on both sides, and the spiral directions of the two spiral conveying blades are opposite. The leveling roller includes a rotating shaft with a roller body installed on it for leveling the mud.

[0018] A transmission mechanism 1 is provided between the two straw pressing rollers. A square tube 2 is fixedly connected to one side of each connecting plate. A side plate 1 is fixedly connected to the bottom of each square tube 2. A side plate 2 is fixedly connected to the side of each side plate 1 away from the square tube 2 via a square tube 3. A rotating rod 1 and a rotating rod 2 are connected to each side plate 2 via a bearing 2. A leveling roller is fixedly connected to the surface of the rotating rod 1. A auger roller is symmetrically connected to the surface of the rotating rod 2. A transmission mechanism 2 is connected between the rotating rod 1 and the rotating rod 2. A transmission mechanism 3 is connected between the rotating rod 2 and the fixed rod.

[0019] The transmission mechanism includes a sprocket and a chain. The end of the straw pressing roller is rotatably mounted to a fixed shaft via a bearing. The outer ends of the bearings are all connected to sprockets, and the sprockets are connected to each other via the chain.

[0020] The transmission mechanism two includes a sprocket two and a chain two. The surfaces of the bearing two are all connected to the sprocket two, and the sprocket two are connected to each other by the chain two.

[0021] The transmission mechanism three includes a sprocket three and a chain three. The bearing one and the bearing two are respectively equipped with sprocket three. The sprocket three is located outside the sprocket two of the auger roller and the sprocket one of the grass pressing roller near the auger roller side. The sprocket three are connected to each other through the chain three.

[0022] A sprocket four is connected to a bearing two on the surface of the rotating rod one. The sprocket four is connected to the sprocket of the rice transplanter main shaft via a chain.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] (1) By setting up side plate one, square tube three, side plate two, fixed rod, cam track, roller, connecting seat, connecting rod, pressing grass plate, bearing one, pressing grass roller, opening, transmission mechanism one and transmission mechanism three, the pressing grass roller rotates with the main shaft of the rice transplanter. The pressing grass roller drives the pressing grass plate and roller to rotate on the cam track through the opening and the limiting mechanism. Due to the shape of the cam track, the pressing grass plate moves slowly to extend and quickly to retract during rotation. This can bury the straw and stubble in the paddy field into the mud and also achieve quick retraction to avoid a large amount of stirring of the paddy field mud. In this way, the straw and stubble remaining on the surface of the paddy field can be buried below the planting depth before the film-laying operation of the mulching rice transplanter. This not only preserves the nutritional value of the straw and stubble, but also improves the quality of the subsequent film-laying operation and the hole-drilling transplanting operation of the mulching rice transplanter.

[0025] (2) By setting up bearing 2, rotating rod 1, rotating rod 2, leveling roller, auger roller, transmission mechanism 2 and transmission mechanism 3, the auger roller and leveling roller rotate with the main shaft of the rice transplanter. Since the straw pressing plate will inevitably turn over the mud during the straw pressing process, resulting in uneven mud surface, the auger roller and leveling roller are set after the two sets of straw pressing rollers. When the auger roller rotates, it can transport the mud on both sides to the middle part, and then the leveling roller will flatten it, ensuring that the surface of the paddy field mud is flat before the film laying and rice transplanting operation.

[0026] (3) By setting up a telescopic mechanism, the pressing depth of the straw pressing roller, the auger roller and the leveling roller can be adjusted according to different paddy fields, which increases the applicability of the machine.

[0027] (4) By setting up a straw pressing ring, it can further assist in pressing some longer and irregular straw and stubble into the mud when the straw pressing roller and straw pressing plate are working. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2This is a schematic diagram of the structure of a leveling roller, a auger roller, and a straw pressing roller in a mulched rice transplanter suitable for paddy fields containing stubble and straw, according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of transmission mechanism one, transmission mechanism two, and transmission mechanism three in this invention;

[0032] Figure 4 This is a schematic diagram of the structure of the fixing rod in this invention;

[0033] Figure 5 This is a partially enlarged view of the fixing rod in this invention;

[0034] Figure 6 This is a schematic diagram of the cam track structure in this invention;

[0035] Figure 7 This is a schematic diagram of the roller structure in this invention;

[0036] Figure 8 This is a schematic diagram of the structure of the grass pressing roller in this invention.

[0037] Figure label:

[0038] 1. Rice transplanter crossbeam; 2. Square tube one; 3. Film-coating roller; 4. Connecting plate; 5. Square tube two; 6. Side plate one; 7. Square tube three; 8. Side plate two; 9. Fixing rod; 10. Cam track; 11. Roller; 12. Connecting seat; 13. Connecting rod; 14. Straw pressing sheet; 15. Bearing one; 16. Straw pressing roller; 17. Opening; 18. Bearing two; 19. Rotating rod one; 20. Rotating rod two; 21. Leveling roller 22. Screw roller; 23. Screw; 24. Limiting plate; 25. Handle; 26. Slide rail; 27. Pulley; 28. Limiting hole; 29. ​​Limiting block; 30. Sprocket 1; 31. Chain 1; 32. Sprocket 2; 33. Chain 2; 34. Sprocket 3; 35. Chain 3; 36. Pressing ring; 37. Sprocket 4; 38. Film pressing device; 39. Edge pressing device; 40. Film cutting device; 41. Insertion mechanism. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] Please see Figure 1-8An embodiment of the present invention: A rice transplanter suitable for paddy fields containing stubble and straw, comprising a transplanter beam 1, a film-hanging roller 3 fixed to the front of the transplanter beam 1 via a mounting frame, and a film-pressing device 38, an edge-pressing device 39, and a film-cutting device 40 connected to the rear of the transplanter beam 1 via a bracket, which cooperate with the film-hanging roller. A seedling box and a separating mechanism 41 are provided between the film-pressing device 38 and the film-cutting device 40. Below the film-hanging roller 3, a device is provided to bury the stubble and straw into the seedling tray. The grass-pressing mechanism below the seedling depth includes a fixed shaft on which a grass-pressing roller 16 is rotatably mounted. The grass-pressing roller 16 has several axially arranged openings 17 on its surface circumferentially. Each opening 17 has a corresponding radially movable grass-pressing plate 14. The inner side of the grass-pressing plate 14 is connected to the fixed shaft of the grass-pressing roller 16 through a connecting assembly. There are multiple sets of connecting assemblies, which are spaced apart along the axial direction. A leveling device is provided at the rear of the grass-pressing mechanism.

[0042] In the structure, the connecting assembly includes multiple fixed rods 9 sequentially mounted on a fixed shaft. Cam tracks 10 are respectively provided between the ends of adjacent fixed rods 9. Multiple rollers 11 are fitted along the inner circumference of the cam tracks 10. Each roller 11 has a connecting seat 12 on its outer surface, and the connecting seat 12 is movably connected to the roller 11. Sliding mechanisms are provided on both sides of the connecting seat 12 and between it and the cam tracks 10. A connecting rod 13 is fixedly connected to the top of each connecting seat 12, and a straw-pressing plate 14 is fixedly connected to the top of each connecting rod 13. The straw-pressing roller can follow the rice transplanter. The main shaft rotates, and the straw pressing roller drives the straw pressing plate and roller to rotate on the cam track through the opening and the limiting mechanism. Due to the shape of the cam track, the straw pressing plate extends slowly and retracts quickly during the rotation. This not only buries the straw and stubble in the paddy field into the mud, but also allows for rapid retraction to avoid stirring up a lot of paddy field mud. In this way, the straw and stubble remaining on the surface of the paddy field can be buried below the planting depth before the mulching transplanter is laid. This not only preserves the nutritional value of the straw and stubble, but also improves the quality of the subsequent mulching transplanter's mulching and perforation transplanting operations.

[0043] Square tube 1 2 is fixedly connected to both sides of the crossbeam 1 of the rice transplanter. A film-hanging roller 3 is provided at the bottom of the square tube 1 2. A connecting plate 4 is fixedly connected to both sides of the film-hanging roller 3. A telescopic mechanism is provided between the connecting plate 4 and the square tube 1 2. A square tube 2 5 is fixedly connected to one side of the connecting plate 4. A side plate 1 6 is fixedly connected to the bottom of the square tube 2 5. A side plate 2 8 is fixedly connected to the side of the side plate 1 6 away from the square tube 2 5 through a square tube 3 7.

[0044] Two fixed shafts are fixedly connected between the side plates 6. Four fixed rods 9 are fitted on the fixed shafts. Three cam tracks 10 are provided on the end surfaces of each fixed rod 9. Six rollers 11 are fitted inside the cam tracks 10. Connecting seats 12 are provided on the outside of each roller 11. The connecting seats 12 and rollers 11 are movably connected. Sliding mechanisms are provided between the two sides of the connecting seats 12 and the cam tracks 10. Connecting rods 13 are fixedly connected to the top of each connecting rod 12. A grass pressing plate 14 is fixedly connected to the top of each connecting rod 13. Bearings 15 are connected to both ends of each fixed rod 9. Grass pressing rollers 16 are connected to the surface of each bearing 15. Several openings 17 are opened on the surface of each grass pressing plate 14. Each opening 17 matches the grass pressing plate 14. A limiting mechanism is provided between each opening 17 and the grass pressing plate 14.

[0045] A transmission mechanism one is provided between the two fixed shafts. The side plate two 8 is connected to a rotating rod one 19 and a rotating rod two 20 via a bearing two 18. A flat roller 21 is fixedly connected to the surface of the rotating rod one 19. A gyratory roller 22 is symmetrically connected to the surface of the rotating rod two 20. A transmission mechanism two is connected between the rotating rod one 19 and the rotating rod two 20. A transmission mechanism three is connected between the rotating rod two 20 and the fixed shaft. The transmission mechanism one includes a sprocket one 30 and a chain one 31. One end of each bearing one 15 is connected to a sprocket one 30. The sprockets one 30 are connected to each other via the chain one 31. The transmission mechanism two includes a sprocket two 32 and a chain two 33. The surface of each bearing two 18 is connected to a sprocket two 32. The sprockets two 32 are connected to each other via the chain two 33. The transmission mechanism three includes a sprocket three 34 and a chain three 35. The bearing one 15 and the bearing two 18 are connected to the sprocket three 34 via the chain three 35.

[0046] When the mulching rice transplanter is working, the main shaft rotates. Under the action of transmission mechanism one, transmission mechanism two, and transmission mechanism three, bearing one 15 and bearing two 18 rotate with the main shaft. Since bearing one 15 is connected to the pressing roller 16, it drives the pressing roller 16 to rotate. The pressing roller 16 drives the pressing plate 14 and roller 11 to rotate on the cam track 10 through the limiting mechanism. The fixed shaft and the cam track 10 are fixed and do not rotate. The two sides of the cam track 10 have different trajectories, one side is convex outward and the other side is concave inward. The roller 11 and the pressing plate 14 rotate from the convex side to the concave side.

[0047] The straw pressing plate 14 gradually extends out of the opening 17 during rotation, reaching its maximum extension of 2.5cm at the lowest point. It then retracts into the straw pressing roller 16 as it rotates, repeating this cycle. When the straw pressing plate 14 rotates to the convex surface, due to its longer trajectory and gentler slope, it extends more slowly to its maximum extension, effectively pressing straw and stubble into the mud. When the straw pressing plate 14 extends to its maximum extension and enters the concave surface, due to its steeper slope and shorter trajectory, it retracts more quickly into the straw pressing roller 16, preventing excessive mud spillage that could affect subsequent leveling and mulching operations. Furthermore, the two sets of straw pressing plates 14 are staggered, allowing for more effective cleaning of straw and stubble to avoid omissions. The straw pressing plate 14 can press straw and stubble into the mud up to 2.5cm, while the normal transplanting depth is 1-2cm.

[0048] In summary, the above-described method of burying stubble and straw deep below the transplanting depth effectively removes residual straw and stubble from the mud surface while retaining nutrients, thereby increasing rice yield. After deep burial, the rotating straw pressing plates 14 inevitably stir up mud, causing unevenness that can affect mulching and transplanting. Therefore, the auger roller and leveling roller are positioned after the two sets of straw pressing rollers. The rotating auger roller transports the mud from both sides to the middle, where the leveling roller smooths it out, ensuring a flat surface of the paddy field mud before mulching and transplanting. Specific actions... The process is as follows: By setting up bearing 2, rotating rod 1, rotating rod 2, leveling roller, auger roller, transmission mechanism 2 and transmission mechanism 3, the auger roller and leveling roller rotate with the main shaft of the rice transplanter. After the straw pressing plate 14, the auger roller 22 rotates, which can concentrate the mud on both sides into the middle. Then, under the action of the leveling roller 21, the mud is spread out, thus playing a role in leveling the ground before the film laying and rice transplanting work, improving the quality of film laying. Moreover, the blade radius of the auger roller 22 is not large, which can only play a certain mud gathering effect, and will not cause a lot of mud to accumulate in the middle and affect the work of the leveling roller 21.

[0049] Example 2:

[0050] The telescopic mechanism includes a screw 23, a limiting plate 24, a handle 25, and a screw sleeve. The square tube 2 is threadedly connected to the screw 23 via nuts. The top of the screw 23 is fixedly connected to the handle 25. The bottom of the screw 23 passes through the connecting plate 4 and is threadedly connected to the screw sleeve. The screw sleeve is fixedly connected to the connecting plate 4. The top of the connecting plate 4 is symmetrically connected to the limiting plate 24. The top of the limiting plate 24 passes through the square tube 2.

[0051] The sliding mechanism includes a slide rail 26 and a pulley 27. The cam track 10 has slide rails 26 on both sides. The connecting seat 12 has pulleys 27 connected to both sides by connecting rods. The pulleys 27 match the slide rails 26. The limiting mechanism includes limiting holes 28 and limiting blocks 29. The straw pressing plate 14 has limiting blocks 29 fixedly connected to both sides. The opening 17 has limiting holes 28 on both sides. The limiting holes 28 match the limiting blocks 29. The surface of the straw pressing roller 16 has several straw pressing rings 36 fixedly connected to it. The bearing 18 on the surface of the rotating rod 19 is connected to a sprocket 37. The sprocket 37 is connected to the main shaft sprocket of the rice transplanter via a chain.

[0052] Because the consistency of mud varies depending on the type of field, the working depth of the straw pressing plate 14 needs to be adjusted accordingly. The screw 23 can be rotated by turning the handle 25, which in turn moves the connecting plate 4 up and down. This allows the pressing depth of the straw pressing roller, auger roller, and leveling roller to be adjusted according to different paddy fields, increasing the machine's applicability. Multiple straw pressing rings 36 are set on the straw pressing roller 16, which can help press some longer and irregular straw and stubble into the mud when the straw pressing roller and straw pressing plate are working.

[0053] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for 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 embodiments that can be understood by those skilled in the art.

[0054] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A rice transplanter suitable for paddy fields containing stubble and straw, comprising a transplanter beam (1), wherein a film-hanging roller (3) is fixed to the front of the transplanter beam (1) via a mounting frame, and a film-pressing device (38), an edge-pressing device (39), and a film-cutting device (40) cooperating with the film-hanging roller are connected to the rear of the transplanter beam (1) via a bracket, wherein a seedling box and a separating mechanism (41) are provided between the film-pressing device (38) and the film-cutting device (40), characterized in that: Below the film-coating roller (3) is a straw-pressing mechanism that can bury the stubble and straw below the planting depth. The straw-pressing mechanism includes a fixed shaft, on which a straw-pressing roller (16) is rotatably mounted. The surface of the straw-pressing roller (16) has several axially arranged openings (17) in the circumferential direction. At each of the openings (17), a straw-pressing plate (14) that can move radially is provided. The inner side of the straw-pressing plate (14) is connected to the outer surface of the fixed shaft of the straw-pressing roller (16) by a connecting component. The connecting component is in multiple sets and is spaced apart along the axial direction. A leveling device is provided at the rear of the grass pressing mechanism; The connecting assembly includes multiple fixed rods (9) sequentially mounted on a fixed shaft. Cam rails (10) are respectively provided between the ends of adjacent fixed rods (9). Multiple rollers (11) are clamped in the inner circumferential direction between the cam rails (10). Each roller (11) is provided with a connecting seat (12). The connecting seat (12) is movably connected to the two ends of the central shaft of the roller (11). Sliding mechanisms are provided between the two sides of the connecting seat (12) and the cam rails (10). A connecting rod (13) is fixedly connected to the top of the connecting seat (12). The top of the connecting rod (13) is fixedly connected to the straw pressing sheet (14). The sliding mechanism includes a slide rail (26) and a pulley (27). The slide rail (26) is provided on both sides of the cam track (10). The pulley (27) is connected to both outer sides of the connecting seat (12) by a connecting rod. The pulley (27) matches the slide rail (26). A limiting mechanism is provided between the end of the grass pressing plate (14) and the grass pressing roller (16). The limiting mechanism includes a limiting hole (28) and a limiting block (29). The limiting blocks (29) are fixedly connected to both sides of the grass pressing plate (14). The limiting holes (28) are opened on both sides of the opening (17). The limiting holes (28) match the limiting blocks (29).

2. The mulched rice transplanter according to claim 1, applicable to paddy fields containing stubble and straw, is characterized in that: The two sides of the crossbeam (1) of the rice transplanter are fixedly connected to square tubes (2). A film-hanging roller (3) is provided at the bottom of the square tube (2). The two ends of the film-hanging roller (3) are fixedly connected to the connecting plate (4). The connecting plate (4) and the square tube (2) above are connected and fixed through an adjustable telescopic mechanism.

3. The mulched rice transplanter for paddy fields containing stubble and straw as described in claim 2, characterized in that: The telescopic mechanism includes a screw (23), which is threadedly connected to the square tube (2) via a screw sleeve. A handle (25) is fixedly connected to the top of the screw (23). The bottom of the screw (23) passes through the connecting plate (4) and is threadedly connected to the screw sleeve installed in the connecting plate. The screw sleeve is fixedly connected to the connecting plate (4). Limiting plates (24) are symmetrically connected to the top of the connecting plate (4). The top of the limiting plate (24) passes through the square tube (2).

4. The mulched rice transplanter according to claim 1, applicable to paddy fields containing stubble and straw, has the following characteristics: The feature is that: a number of spaced pressing rings (36) are fixedly connected to the surface of the pressing roller (16), and the pressing rings (36) are distributed at the end of the pressing roller (16) and at the spatial position of the adjacent pressing plate (14).

5. The mulched rice transplanter according to claim 1, applicable to paddy fields containing stubble and straw, characterized in that: The grass pressing mechanism consists of two sets arranged side by side, with the circumferential angles of the grass pressing plates (14) in the front and rear grass pressing mechanisms being staggered.

6. The mulched rice transplanter according to claim 1, applicable to paddy fields containing stubble and straw, is characterized in that: The leveling device includes a auger roller (22) and a leveling roller (21) arranged sequentially behind the straw pressing mechanism. The auger roller (22) is used to transport mud from both sides to the middle. It includes a rotating shaft with two symmetrical spiral conveying blades on both sides, and the spiral directions of the two spiral conveying blades are opposite. The leveling roller (21) includes a rotating shaft with a roller body installed on it for leveling the mud.

7. The rice transplanter with film covering suitable for paddy fields containing stubble and straw according to claim 2, characterized in that: A square tube 2 (5) is fixedly connected to one side of the connecting plate (4), and a side plate 1 (6) is fixedly connected to the bottom of the square tube 2 (5). Two fixed shafts are fixedly connected between the side plates 1 (6), and a transmission mechanism 1 is provided between the two fixed shafts. The side of the side plate 1 (6) away from the square tube 2 (5) is fixedly connected to the side plate 2 (8) through the square tube 3 (7). The side plate 2 (8) is connected to the rotating rod 1 (19) and the rotating rod 2 (20) through the bearing 2 (18). A flat roller (21) is fixedly connected to the surface of the rotating rod 1 (19), and a gyratory roller (22) is symmetrically connected to the surface of the rotating rod 2 (20). A transmission mechanism 2 is connected between the rotating rod 1 (19) and the rotating rod 2 (20), and a transmission mechanism 3 is connected between the rotating rod 2 (20) and the fixed rod (9). The transmission mechanism includes a sprocket (30) and a chain (31). The end of the straw pressing roller is rotatably mounted to a fixed shaft via a bearing (15). The outer end of the bearing (15) is connected to a sprocket (30). The sprockets (30) are connected to each other via the chain (31). The transmission mechanism two includes a sprocket two (32) and a chain two (33). The surfaces of the bearing two (18) are all connected to the sprocket two (32), and the sprocket two (32) are connected to each other by the chain two (33). The transmission mechanism three includes a sprocket three (34) and a chain three (35). The bearing one (15) and the bearing two (18) are respectively equipped with sprocket three (34). The sprocket three (34) is located outside the sprocket two (32) of the auger roller (22) and the sprocket one (30) of the grass pressing roller (16) near the auger roller (22). The sprocket three (34) are connected to each other through the chain three (35). A sprocket four (37) is connected to a bearing two (18) on the surface of the rotating rod one (19), and the sprocket four (37) is connected to the sprocket of the rice transplanter main shaft through a chain.

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