Rice full mulching dry direct seeding machine

Abstract

The application discloses a full-film dry direct seeding machine for rice, which comprises a frame, a rotary tiller, a mulch laying device, a soil covering device and a seeding device arranged on the frame, wherein the mulch laying device comprises a pair of support plates, a fixed beam, a roller and a placing rack arranged in sequence between the two support plates, a film roller is arranged on the placing rack, and a mulch tube is sleeved on the film roller; the soil covering device comprises a soil distribution box, a plurality of soil inlets corresponding to the rotary tiller are uniformly arranged on the soil distribution box, an inclined first soil guide sheet is arranged on the upper edge of the soil inlet, a soil outlet corresponding to the soil inlet is formed by a plurality of inclined second soil guide sheets on the lower edge of the soil inlet, a long strip-shaped soil storage plate is rotationally connected above the soil inlet, and a first electric push rod for driving the soil storage plate to overturn is arranged above the soil storage plate. The application has the characteristics of realizing full-film seeding, uniform soil pressing on the film, and improving seeding quality and seedling emergence rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery, and in particular to a rice full-mulching dry direct seeding machine. BACKGROUND

[0002] With climate change and increasing industrial and urban water consumption, the contradiction between limited water resources and agricultural water use is becoming increasingly tense, and drought-resistant, water-saving, green, high-yield and efficient cultivation has become the trend of modern agricultural development. Rice full-mulching dry direct seeding is a method of planting rice in dry land covered with mulch film by sequentially performing plowing, fertilizing, mulch laying, soil covering, watering, seeding and film cutting, which has significant advantages in drought resistance, water saving, fertilizer saving, greenness, high yield and efficiency, and is suitable for water scarce areas, and is of great significance for the development of rice industry and food security in water scarce and drought prone areas.

[0003] Rice full-mulching dry direct seeding is usually performed by a rice full-mulching dry direct seeding machine for fertilizing, mulching and seeding. The existing rice full-mulching dry direct seeding machine has the following problems in use: 1. the film width and the edge of the film width are prone to have exposed ground surface; 2. the film width and the edge of the film width are difficult to align, resulting in unevenly exposed ground surface; 3. the soil at the edge of the film width is not pressed or the amount of pressed soil is insufficient, which is easily lifted by wind and causes the ground surface to be exposed, resulting in serious loss of soil moisture and overgrowth of weeds; and 4. the soil on the film is not pressed reasonably, resulting in serious misalignment of the film holes and seed holes, and many rice seedlings cannot grow out of the film holes and die under the film. The above problems result in poor seeding quality, weak growth of seeds and low yield of the existing rice full-mulching dry direct seeding machine. SUMMARY

[0004] The present application aims to provide a rice full-mulching dry direct seeding machine. The present application has the characteristics of full-mulching seeding, uniform soil pressing on the film, improved seeding quality and increased seedling emergence rate.

[0005] The technical scheme of the present application: a rice full mulching dry direct seeding machine, comprising a frame, a rotary tiller, a mulch laying device, a soil covering device and a seeding device are arranged on the frame, the mulch laying device comprises support plates rotatably connected at the front end of the frame on both sides, a fixed beam, a roller and a placing rack are sequentially arranged between the two support plates, a film roller is arranged on the placing rack, a mulch tube is sleeved on the film roller, the mulch on the mulch tube is guided from the top to the front of the roller, and then from the bottom of the roller to the back of the seeding wheel of the seeding device; the soil covering device comprises a soil distribution box above the mulch laying device, a plurality of soil inlets corresponding to the rotary tiller are uniformly arranged on the soil distribution box, an inclined first soil guide plate is arranged on the upper edge of the soil inlet; the lower edge of the soil inlet is provided with a soil outlet corresponding to the soil inlet formed by a plurality of inclined second soil guide plates; an outer cover connected with the rotary tiller is arranged outside the soil distribution box, a soil storage plate rotatably connected above the soil inlet of the soil distribution box is arranged in the inner part of the outer cover, the soil storage plate is in strip shape, and a first electric push rod for driving the soil storage plate to overturn is arranged above the soil storage plate.

[0006] In the foregoing rice full mulching dry direct seeding machine, the bottom of the fixed beam is provided with a pressing groove, a mounting bracket is movably connected in the pressing groove, a compression spring is arranged between the pressing groove and the mounting bracket, and a pressing wheel in contact with the surface of the roller is rotatably connected on the mounting bracket.

[0007] In the foregoing rice full mulching dry direct seeding machine, the roller is rotatably connected to the support plate through a bearing, and a plurality of anti-skid strips are uniformly arranged on the surface of the roller along the circumferential direction.

[0008] In the foregoing rice full mulching dry direct seeding machine, the front end of the support plate extends in the direction away from the film roller to form a falling limiting rod.

[0009] In the foregoing rice full mulching dry direct seeding machine, the rotary tiller comprises a rotary tiller body, a ditching assembly is arranged on both sides of the rotary tiller body, the ditching assembly comprises a ditching connecting rod connected with the rotary tiller body, a hydraulic cylinder is arranged on the ditching connecting rod, a bearing seat is arranged on the hydraulic rod of the hydraulic cylinder, a ditching disc is rotatably connected to the bearing seat, and the ditching disc and the seeding wheel of the seeding device form an angle of 25°.

[0010] In the foregoing rice full mulching dry direct seeding machine, a film pressing wheel is arranged on the rear side of the film roller on the support plate, the film pressing wheel comprises a film pressing support connected to the support plate through a shaft pin, a film pressing roller is rotatably connected to the film pressing support, and a tension spring is arranged between the film pressing support and the support plate.

[0011] In the foregoing rice full mulching dry direct seeding machine, a soil pressing wheel is arranged on both sides of the seeding device, the soil pressing wheel is installed at the two ends of the cross beam of the seeding device through a soil pressing support, and a spring rod is arranged between the cross beam and the soil pressing support.

[0012] In the rice full-film dry direct seeding machine, a soil guiding assembly is further arranged between the rotary tillage device and the soil dividing box, the soil guiding assembly comprises two fixed plates arranged at two ends of the rotary tillage main body, and a soil guiding plate is arranged between the two fixed plates and is in the same horizontal plane as the roller, and the soil guiding plate is at an angle of 135 degrees with the ground.

[0013] In the rice full-film dry direct seeding machine, a film cutting device is arranged at the rear side of the soil covering device, the film cutting device comprises a film cutting support connected with the frame, a hydraulic oil cylinder is arranged at the upper part of the film cutting support, a rotating shaft is rotatably connected with the lower part of the film cutting support, the rotating shaft is connected with a cutting plate through a connecting rod, a cutting knife is arranged at the bottom of the cutting plate, a lifting frame is movably connected with the piston rod of the hydraulic oil cylinder, one end of the lifting frame is movably connected with a connecting rod, and the other end of the lifting frame is fixedly connected with a clamping plate.

[0014] In the rice full-film dry direct seeding machine, the lifting frame comprises a driving part movably connected with the piston rod of the hydraulic oil cylinder, one end of the driving part is provided with a fixed section, the clamping plate is connected with the fixed section, and the other end of the driving part is provided with a U-shaped frame, and lifting rods are hingedly connected with the connecting rod at two sides of the U-shaped frame.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] The film laying device and the soil covering device are improved, the film roller and the roller are designed in the film laying device, the linear speed of the roller is the same as the walking speed of the dry direct seeding machine, no dragging is generated, and when the film is laid, there is a certain longitudinal margin, the film is laid flat, no film dragging, film breaking, internal rolling and the like are generated, the film width and the film width edge are aligned, the film hole and the seed hole are prevented from being misaligned, full-film covering seeding is realized, and the problems of weed growth and serious loss of soil moisture are effectively prevented.

[0017] The film pressing wheel and the soil pressing wheel are designed to generate a certain pressure on the film and the soil on the film, the film is prevented from moving, and the problems that the soil pressing at the film edge is not real and the soil is easily lifted by the wind are solved.

[0018] Through the soil dividing box structure, when the rotary tillage device works, the soil is guided by the first soil guiding piece, thrown into the multiple soil inlet openings of the soil dividing box, and correspondingly discharged from the multiple soil outlet openings, so that the soil is more comprehensively pressed on the top surface of the film to form uniform soil ridges, the work is stable, and the problem of weed growth in the soil taking trench caused by side soil taking is avoided.

[0019] When the dry direct seeding machine is working and walking, the soil storage plate is in a horizontal state, and part of the soil thrown backward during the working of the rotary tillage main body is stored on the soil storage plate; at the beginning of the next seeding strip, after the mulching film is laid, before the machine walks, the soil storage plate is controlled by the first electric push rod to be turned over, the soil reserved on the surface of the soil storage plate is unloaded from the soil outlet of the soil distribution box and falls on the mulching film, so that the mulching film is pressed and not dragged, and a strip-shaped soil film is formed.

[0020] Therefore, the rice full-mulching dry direct seeding machine improves the seeding quality of rice mulching dry direct seeding, greatly improves the emergence rate of rice full-mulching dry direct seeding, and realizes true rice full-mulching dry direct seeding cultivation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front axle drawing of the rice full-mulching dry direct seeding machine of the application;

[0022] Figure 2 It is a rear axle drawing of the rice full-mulching dry direct seeding machine of the application;

[0023] Figure 3 It is an exploded view of the rice full-mulching dry direct seeding machine of the application;

[0024] Figure 4 It is a structural schematic view of the rotary tillage device of the application;

[0025] Figure 5 It is a structural schematic view of the ditching assembly of the application;

[0026] Figure 6 It is a structural schematic view of the mulching film laying device of the application;

[0027] Figure 7 It is a structural schematic view of the roller of the application;

[0028] Figure 8 It is an installation schematic view of the film roller of the application;

[0029] Figure 9 It is a structural schematic view of the covering device of the application;

[0030] Figure 10 It is a structural schematic view of the soil distribution box of the application;

[0031] Figure 11 It is a structural schematic view of the soil pressing wheel of the application;

[0032] Figure 12 It is a structural schematic view of the film cutting device of the application.

[0033] The marks in the drawings are: 1, frame; 2, rotary tillage device; 21, rotary tillage body; 22, ditching assembly; 23, ditching connecting rod; 24, hydraulic cylinder; 25, ditching disc; 3, mulch laying device; 31, support plate; 311, falling limiting rod; 312, positioning hole; 313, mounting hole; 32, fixed beam; 321, pressing groove; 322, mounting bracket; 323, compression spring; 324, compression wheel; 33, roller; 331, anti-skid strip; 34, placing frame; 341, first connecting part; 342, second connecting part; 343, handle part; 344, V-shaped groove; 35, film roller; 351, adjusting sleeve; 352, second electric push rod; 353, distance inductor; 36, mulch drum; 37, film compression wheel; 371, film compression support; 372, film compression roller; 373, pull hole; 4, covering device; 41, soil distribution box; 42, soil inlet; 421, first soil guide piece; 43, second soil guide piece; 44, soil outlet; 45, outer cover; 46, soil storage plate; 47, first electric push rod; 48, soil compression wheel; 481, soil compression support; 5, seeding device; 51, seeding wheel; 52, seeding support; 6, soil guide assembly; 61, fixed plate; 62, soil guide plate; 7, film cutting device; 71, film cutting support; 72, hydraulic oil cylinder; 73, rotating shaft; 731, connecting rod; 74, lifting frame; 741, driving part; 742, fixed section; 743, U-shaped frame; 744, lifting rod; 75, cutting plate; 751, cutting knife; 76, clamping plate; 81, water wheel; 82, water wheel support. DETAILED DESCRIPTION

[0034] The application will be further described in conjunction with the examples below, but not as the basis for limiting the application.

[0035] Example:

[0036] A rice full-mulch dry direct seeding machine comprises a frame 1, a rotary tillage device 2, a mulch laying device 3, a covering device 4 and a seeding device 5 arranged on the frame 1, the rotary tillage device 2 comprises a rotary tillage body 21, and a ditching assembly 22 is arranged on each side of the rotary tillage body 21, the ditching assembly 22 comprises a ditching connecting rod 23 connected with the rotary tillage body 21, a hydraulic cylinder 24 is arranged on the ditching connecting rod 23, a bearing seat is arranged on the hydraulic rod of the hydraulic cylinder 24, and a ditching disc 25 is rotationally connected with the bearing seat; the ditching disc 25 can rotate freely through the structure of the bearing seat, is driven to lift or lower by the hydraulic cylinder 24, and thus the ditching depth of the ditching disc 25 can be adjusted according to the required ditching depth; in operation, the ditching disc 25 adjacent to the previous seeding belt is lifted to be out of operation, and the ditching disc 25 at the other end is lowered to be in operation, so that continuous operation is realized.

[0037] The periphery of the furrowing disc 25 is jagged, and the center of the furrowing disc 25 is provided with a plurality of through holes, so as to facilitate cutting of the soil and reduce resistance. The furrowing disc 25 is at an angle of 25° with the seeding wheel 51 of the seeding device 5.

[0038] The mulching film laying device 3 comprises support plates 31 rotatably connected to both sides of the frame 1 through shaft pins. The support plates 31 can rotate freely around the shaft pins, so that the entire film laying device can float up and down, and the flexibility of use is high. Fixed beams 32, rollers 33 and placing racks 34 are sequentially arranged between the two support plates 31. The fixed beams 32 are arranged so that the two support plates 31 form a whole that rotates synchronously around the shaft. The rollers 33 are rotatably installed on the support plates 31 through bearings. The placing racks 34 are provided with film rollers 35. The film rollers 35 are sleeved with film cylinders 36. The film on the film cylinders 36 is guided from the front to the back below the seeding wheel 51 of the seeding device 5 after being wound around the rollers 33 from the top to the front.

[0039] The surface of the roller 33 is uniformly provided with a plurality of anti-skid strips 331 along the circumferential direction. The anti-skid strips 331 are made of foamed rubber strips. The anti-skid strips 331 protect the roller 33 from wear and corrosion, improve the friction between the roller 33 and the ground and the film, reduce the excessive tension of the film caused by the sliding of the roller 33, reduce the slipping of the film, and increase the length of the film around the roller 33 due to the protruding effect of the anti-skid strips 331, thereby increasing the film allowance and offsetting the excessive tension. Therefore, the film laid by the film laying device 3 is flat, does not drag the film, does not break the film, and the edge tightening degree is appropriate.

[0040] The support plates 31 are provided with a plurality of positioning holes 312 for installing the placing racks 34. The positions of the placing racks 34 are adjusted through different positioning holes 312, so as to adjust the gap between the film rollers 35 and the rollers 33.

[0041] The film rollers 35 are provided with sliding sleeves, which ensure the stability and reliability of the film during operation.

[0042] The bottom of the fixed beam 32 is provided with a pressing groove 321, and a mounting bracket 322 is movably connected in the pressing groove 321. A compression spring 323 is arranged between the pressing groove 321 and the mounting bracket 322. A pressing wheel 324 in contact with the surface of the roller is rollingly connected to the mounting bracket 322. Both ends of the film roller 35 are provided with adjusting sleeves 351. The placing frame 34 is provided with a second electric push rod 352 and a distance sensor 353 connected with the adjusting sleeves 351. The mounting bracket 322 pushes the pressing wheel 324 downward by the tension of the compression spring 323, so that the pressing wheel 324 is in contact with the mulch film on the roller 33, and the mulch film is pressed to prevent the mulch film from deviating. The distance between the mulch film and the distance sensor is detected. If the position of the mulch film is found to be incorrect, the adjusting sleeves 351 on both sides are pushed by the second electric push rod 352, and then the mulch film cylinder 36 on the film roller 35 is pushed, so that the position of the mulch film cylinder 36 is adjusted, and the mulch film output by the mulch film cylinder 36 can accurately correspond to the seeding wheel 51 of the seeding device 5, so that the alignment between the film width and the film width edge is ensured.

[0043] The placing frame 34 includes a first connecting part 341, a second connecting part 342 and a handle part 343. The first connecting part 341 and the second connecting part 342 form a V-shaped groove 344 for placing the film roller 35. The front end of the first connecting part 341 is rotatably connected to the support plate 31 through a shaft pin, and the rear end of the second connecting part 342 is fixedly connected to the support plate 31 through a movable pin. When placing the film roller 35, the movable pin is pulled out, the placing frame 34 is lowered, the film roller 35 is placed in the V-shaped groove 344, then the movable pin is inserted to fix the placing frame 34.

[0044] The front end of the support plate 31 extends in the direction away from the film roller 35 to form a falling limiting rod 311 for controlling the limited falling of the mulching device. A plurality of mounting holes 313 arranged in a straight line are arranged on the falling limiting rod 311, and the gap between the roller 33 and the soil guide plate 62 can be adjusted.

[0045] The support plate 31 is provided with a film pressing wheel 37 on the rear side of the film roller 35. The film pressing wheel 37 includes a film pressing bracket 371 connected to the support plate 31 through a shaft pin, and a film pressing roller 372 rotatably connected to the film pressing bracket 371. A tension spring (not shown in the figure) is arranged between the film pressing bracket 371 and the support plate 31. The film pressing wheel 37 can rotate around the shaft pin to float up and down. The roller of the film pressing wheel 37 produces a certain pressure on the ground through the tension spring, so as to press the mulch film and prevent the mulch film from moving. A plurality of pull holes 373 for connecting the tension spring are arranged on the film pressing bracket 371, so that the pressure of the film pressing wheel 37 on the ground can be adjusted by connecting the tension spring to different pull holes 373 or adjusting the spring force.

[0046] Therefore, the film roller 35 and the roller 33 in the mulch film laying device 3 of the present application are in the same direction as the advancing direction of the seeding wheel 51, and press and roll the mulch film forward, the rotational linear speed of the roller 33 is the same as the walking speed of the dry direct seeding machine, no dragging is generated, and there is a certain longitudinal allowance when the mulch film is laid, the mulch film is laid flat, no mulch film dragging, breaking, internal rolling and other situations occur, thereby avoiding the mispositioning of the film hole and the seed hole, achieving full mulch film covering seeding, and effectively preventing weed growth and serious loss of soil moisture.

[0047] The soil covering device 4 comprises a soil distribution box 41 located above the mulch film laying device 3, the soil distribution box 41 is uniformly provided with a plurality of soil inlet openings 42 corresponding to the rotary tillage main body 21, and the upper edge of the soil inlet opening 42 is provided with an inclined first soil guide piece 421; the lower edge of the soil inlet opening 42 is provided with a soil outlet opening 44 corresponding to the soil inlet opening 42 formed by a plurality of inclined second soil guide pieces 43, which can accurately guide the entry and discharge of soil. Through the soil distribution box structure, when the rotary tillage main body 21 is working, the soil is guided by the first soil guide piece 421 and thrown into the plurality of soil inlet openings 42 of the soil distribution box 41, and discharged from the plurality of soil outlet openings 44, which is more comprehensive and can press the soil on the top surface of the mulch film to form a uniform soil ridge, and the work is stable, thereby avoiding the problem of weed growth in the soil taking trench caused by side soil taking.

[0048] The soil distribution box 41 is installed on the fixed beam 32 of the mulch film laying device 3, so that it can float with the floating of the mulch film laying device 3, and ensure that the soil discharged from the soil distribution box 41 is accurately pressed on the mulch film.

[0049] The outside of the soil distribution box 41 is provided with an outer cover 45 connected with the rotary tillage device 2, the outer cover 45 comprises an upper outer cover and a side outer cover, which prevents the soil generated by the rotary tillage of the rotary tillage device 2 from flying outward, and ensures that the soil accurately enters the soil distribution box 41.

[0050] The inside of the outer cover 45 is rotatably connected with a soil storage plate 46 located above the soil inlet opening 42 of the soil distribution box 41, the soil storage plate 46 is in a strip shape, and the upper side of the soil storage plate 46 is provided with a first electric push rod 47 for driving the soil storage plate 46 to flip.

[0051] When the dry direct seeding machine is working and walking, the soil storage plate 46 is in a horizontal state, and part of the soil thrown by the rotary tillage main body 21 is stored on the soil storage plate 46, at the start of the next seeding belt, after the mulch film is laid, before the machine walks, the soil storage plate 46 is controlled by the first electric push rod 47 to flip, the soil reserved on the surface of the soil storage plate 46 is unloaded from the soil outlet opening 44 of the soil distribution box 41 and falls on the mulch film, thereby pressing the mulch film and preventing it from being dragged, and forming a strip-shaped soil pressure film, which is uniform and consistent.

[0052] The both sides of the seeding device 5 are provided with soil compacting wheels 48, which are installed at the both ends of the beam of the seeding device 5 through soil compacting supports 481, and spring rods (not shown in the figure) are arranged between the beam and the soil compacting supports 481. The soil compacting wheels 48 generate a certain pressure on the soil on the film and the edges of the film through the spring rods, compact and flatten the edges of the film, and solve the problem that the edges of the film are not compacted by soil and are easily lifted by wind.

[0053] The soil compacting device 2 is further provided with a soil guiding assembly 6 between the soil compacting device 2 and the soil distributing box 41. The soil guiding assembly 6 comprises fixed plates 61 installed at the both ends of the soil compacting main body 21, and soil guiding plates 62 arranged between the two fixed plates 61 and in the same horizontal plane as the roller 33, and the soil guiding plates 62 are at an angle of 135° with the ground. The position and angle of the soil guiding assembly 6 can guide the soil generated by the soil compacting main body 21 to fall into the soil distributing box 41 as much as possible, and reduce the leakage.

[0054] The rear side of the soil covering device 4 is provided with a film cutting device 7, which comprises a film cutting support 71 connected with the frame 1, an upper part of the film cutting support 71 is provided with a hydraulic oil cylinder 72, a lower part of the film cutting support 71 is rotatably connected with a rotating shaft 73, the rotating shaft 73 is connected with a cutting plate 75 through a connecting rod 731, a bottom of the cutting plate 75 is provided with a cutting knife 751, a piston rod of the hydraulic oil cylinder 72 is movably connected with a lifting bracket 74, one end of the lifting bracket 74 is movably connected with a connecting rod, and the other end of the lifting bracket 74 is fixedly connected with a clamping plate 76. The lifting bracket 74 comprises a driving part 741 movably connected with the piston rod of the hydraulic oil cylinder 72, one end of the driving part 741 is provided with a fixed section 742, the clamping plate 76 is connected with the fixed section 742, the other end of the driving part 741 is provided with a U-shaped bracket 743, and the both sides of the U-shaped bracket 743 are provided with lifting rods 744 hinged with the connecting rod 731. The hydraulic oil cylinder 72 is connected with the cutting knife 751 through the lifting bracket 74, and the lifting bracket 74 is further provided with the fixed clamping plate 76. When the hydraulic oil cylinder 72 is extended and retracted, the cutting knife 751 is driven by the lifting bracket 74 to rotate around the rotating shaft 73 and move up and down, so as to realize the opening and closing between the cutting knife 751 and the clamping plate 76, and further realize the clamping and cutting of the film, and improve the cutting stability and smoothness.

[0055] The rice full-film dry direct seeding machine further comprises a watering device, which comprises a water wheel 81 located at the front side of the seeding wheel 51, the water wheel 81 is connected with the seeding support 52 of the seeding wheel 51 through a water wheel support 82, spring rods (not shown in the figure) are arranged between the water wheel support 82 and the seeding support 52, and the water wheel 81 has a certain pressure on the film through the spring rods to prevent the film from being displaced. The water wheel 81 is spindle-shaped, which can better push the water on the film into the film holes.

[0056] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0057] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be replaced by equivalents; all these modifications and replacements shall belong to the protection scope of the appended claims of the present application.

Claims

1. A dry direct seeding machine for rice with full plastic film mulching, characterized in that: The machine includes a frame (1), on which are mounted a rotary tillage device (2), a mulch film laying device (3), a soil covering device (4), and a sowing device (5). The mulch film laying device (3) includes a support plate (31) rotatably connected to both sides of the frame (1) at its front end. Between the two support plates (31) are a fixed beam (32), a roller (33), and a placement frame (34) in sequence. The roller (33) is rotatably connected to the support plate (31) via a bearing. The surface of the roller (33) is evenly provided with several anti-slip strips (331) along the circumferential direction. The placement frame (34) is provided with a film roller (35), on which is mounted a mulch film tube (36). The mulch film on the mulch film tube (36) passes from top to front around the roller (33), and then is guided from bottom to rear to the sowing wheel (51) of the sowing device (5). Below; the soil covering device (4) includes a soil distribution box (41) located above the mulch film laying device (3). The soil distribution box (41) is evenly provided with multiple soil inlets (42) corresponding to the rotary tillage body (21). The upper edge of the soil inlets (42) on both sides is provided with an inclined first soil guide plate (421). The lower edge of the soil inlet (42) is provided with an outlet (44) corresponding to the soil inlet (42) formed by multiple inclined second soil guide plates (43). The soil distribution box (41) is provided with an outer cover (45) connected to the rotary tillage device (2). The inner side of the outer cover (45) is rotatably connected to a soil storage plate (46) located above the soil inlet (42) of the soil distribution box (41). The soil storage plate (46) is long and narrow. The upper part of the soil storage plate (46) is provided with a first electric push rod (47) that drives the soil storage plate (46) to flip. The bottom of the fixed beam (32) is provided with a pressure groove (321), and a mounting bracket (322) is movably connected in the pressure groove (321). A compression spring (323) is provided between the pressure groove (321) and the mounting bracket (322). A pressure roller (324) that is in contact with the roller surface is rolled on the mounting bracket (322). Both ends of the film roller (35) are provided with adjustment sleeves (351). The placement frame (34) is provided with a second electric push rod (352) connected to the adjustment sleeve (351) and a distance sensor (353). The front end of the support plate (31) extends away from the film roller (35) to form a drop limiting rod (311). The rotary tillage device (2) includes a rotary tillage body (21), and ditching components (22) are provided on both sides of the rotary tillage body (21). The ditching component (22) includes a ditching connecting rod (23) connected to the rotary tillage body (21). A hydraulic cylinder (24) is provided on the ditching connecting rod (23). A bearing seat is provided on the hydraulic rod of the hydraulic cylinder (24). A ditching disc (25) is rotatably connected to the bearing seat. The ditching disc (25) and the seeding wheel (51) of the seeding device (5) are at a 25° angle. The back of the covering device (4) is provided with a film cutting device (7). The film cutting device (7) includes a film cutting bracket (71) connected to the frame (1). The upper part of the film cutting bracket (71) is provided with a hydraulic cylinder (72). The lower part of the film cutting bracket (71) is rotatably connected with a rotating shaft (73). The rotating shaft (73) is connected to the cutting plate (75) through a connecting rod (731). The bottom of the cutting plate (75) is provided with a cutting blade (751). A lifting frame (74) is movably connected to the piston rod of the hydraulic cylinder (72). One end of the lifting frame (74) is movably connected to a connecting rod. The other end of the lifting frame (74) is fixedly connected to a clamping plate (76). The lifting frame (74) includes a drive unit (741) that is movably connected to the piston rod of the hydraulic cylinder (72). One end of the drive unit (741) is provided with a fixed section (742), and the clamping plate (76) is connected to the fixed section (742). The other end of the drive unit (741) is provided with a U-shaped frame (743), and both sides of the U-shaped frame (743) are provided with lifting rods (744) that are hinged to the connecting rod (731).

2. The rice direct seeding machine with full film covering according to claim 1, characterized in that: The support plate (31) is provided with a pressing wheel (37) on the rear side of the film roller (35). The pressing wheel (37) includes a pressing bracket (371) connected to the support plate (31) by a shaft pin. A pressing roller (372) is rotatably connected to the pressing bracket (371). A tension spring is provided between the pressing bracket (371) and the support plate (31).

3. The rice direct seeding machine with full film covering according to claim 1, characterized in that: The seeding device (5) is provided with soil pressing wheels (48) on both sides. The soil pressing wheels (48) are installed at both ends of the crossbeam of the seeding device (5) through soil pressing brackets (481). A spring rod is provided between the crossbeam and the soil pressing brackets (481).

4. The rice direct seeding machine with full film covering according to claim 1, characterized in that: A soil guiding assembly (6) is also provided between the rotary tillage device (2) and the soil distribution box (41). The soil guiding assembly (6) includes a fixing plate (61) installed at both ends of the rotary tillage body (21). A soil guiding plate (62) is provided between the two fixing plates (61) and is at the same level as the roller (33). The soil guiding plate (62) is at a 135° angle to the ground.

Images