A machine for burying straw in paddy field

Abstract

The application discloses a paddy field straw returning and burying machine, and relates to the technical field of agricultural machines, comprising a frame body, a cutting and burying assembly and a scraping device; the frame body is used for connecting a traction device and can be dragged to walk by the traction device; the cutting and burying assembly is arranged on the frame body and can cut and press the straw into the soil under the traction of the traction device; the scraping device is arranged on the frame body and behind the cutting and burying assembly and can scrape the soil under the traction of the traction device. The paddy field straw returning and burying machine provided by the application has the advantages of low operation power consumption, high burying rate and the ability to meet the purpose of straw returning.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a straw burying machine for returning straw to paddy fields. Background Technology

[0002] In modern agricultural production, returning straw to the field is an effective way to recycle resources. It not only reduces the pollution of the environment by agricultural waste but also significantly improves soil fertility and crop yield. This technology is particularly significant for paddy fields. Rice production generates a large amount of straw, and how to efficiently and scientifically dispose of this straw is a crucial issue related to the sustainability of agricultural production and ecological environmental protection.

[0003] In existing technologies, when a rotary tiller is used for burying straw in paddy fields, the straw-burying mechanism is driven by the output shaft of the tractor and rotates at a high speed. During operation, straw is easily entangled on the curved straw-burying blades, affecting the working effect and efficiency of the rotary tiller. In addition, the straw rotary tillage operation uses a power-driven rotary tillage device, which can easily cause excessive soil slurry formation during operation, resulting in stunted rice seedlings and affecting the normal growth of rice. Summary of the Invention

[0004] The purpose of this invention is to provide a straw burying machine for paddy fields, which solves the problems existing in the prior art. It consumes less power and has a high burying rate, thus meeting the purpose of straw return to the field.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a straw burying machine for paddy fields, comprising a frame, a cutting and burying assembly, and a leveling device; the frame is used to connect to a traction device and can be dragged by the traction device; the cutting and burying assembly is disposed on the frame and can cut and press the straw into the soil under the traction of the traction device; the leveling device is disposed on the frame and positioned behind the cutting and burying assembly and can level the soil under the traction of the traction device.

[0007] Preferably, the cutting and burying assembly includes a longitudinal cutting and burying device, which includes a first connecting mechanism and a longitudinal cutting and burying member. The first connecting mechanism is connected to the frame, and the longitudinal cutting and burying member is rotatably connected to the first connecting mechanism. The longitudinal cutting and burying member can rotate relative to the first connecting mechanism under the traction of the traction device, so as to cut the straw and press it longitudinally into the soil.

[0008] Preferably, the first connecting mechanism includes a first support base and a first roller shaft, and the longitudinal cutting and embedding component includes a plurality of disc notched rake blades; the first roller shaft is fixedly connected to the frame through the first support base, and the plurality of disc notched rake blades are arranged side by side at intervals along the axial direction of the first roller shaft, and each disc notched rake blade is coaxially rotatably sleeved on the outside of the first roller shaft; each disc notched rake blade can rotate to cut the straw and longitudinally press it into the soil.

[0009] Preferably, the cutting and burying assembly further includes a transverse cutting and burying device located behind the longitudinal cutting and burying device. The transverse cutting and burying device includes a second connecting mechanism and a transverse cutting and burying member. The second connecting mechanism is connected to the frame, and the transverse cutting and burying member is rotatably connected to the second connecting mechanism. The transverse cutting and burying member can rotate relative to the second connecting mechanism under the traction of the traction device so as to cut the straw and press it laterally into the soil.

[0010] Preferably, the second connecting mechanism includes a second support base, and the transverse cutting and embedding component includes a second roller and a spiral slice; the second support base is connected to the frame, both ends of the second roller are rotatably connected to the second support base, and the spiral slice is spirally connected to the outside of the second roller along the axial direction of the second roller; the second roller and the spiral slice can rotate relative to the second connecting mechanism to cut the straw and press it laterally into the soil.

[0011] Preferably, the upper end of the second support is rotatably connected to the frame, and a first elastic element is also connected between each second support and the frame. The elastic force of the first elastic element can press the spiral slice into the soil.

[0012] Preferably, multiple transverse pressure plates are fixedly distributed along the spiral direction within the spiral gap of the spiral slice, and two adjacent transverse pressure plates along the spiral direction form a cavity with the spiral slice and the second roller shaft; along the axial direction parallel to the second roller shaft, at least the multiple transverse pressure plates within the adjacent spiral gap are located in different planes.

[0013] Preferably, the transverse cutting and burying device is configured as two sets, the two sets of transverse cutting and burying devices are arranged side by side along the width direction of the frame, the two spiral slices between the two sets of transverse cutting and burying devices have opposite rotation directions, and the two spiral slices can rotate to cut the straw and press it into the soil laterally towards the inside.

[0014] Preferably, the leveling device includes a third support base and a scraping plate, the scraping plate being connected to the third support base, and the third support base being connected to the frame; the bottom end of the scraping plate is provided with a plurality of cutting and pressing components along the length direction, the cutting and pressing components being able to divide the soil and compress the straw, and the scraping plate being able to level the soil.

[0015] Preferably, the two ends of the third support are rotatably connected to the frame and the scraper plate, respectively; a second elastic element is also connected between the scraper plate and the frame, and the elastic force of the second elastic element can press the scraper plate firmly against the ground.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] The straw burying machine for paddy fields provided by this invention is connected and pulled by a traction device through a frame. The cutting and burying component is set on the frame, and the leveling device is set behind the cutting and burying component. Under the traction of the traction device, the cutting and burying component and the leveling device can be dragged and moved, and can cut the straw, press it into the soil, and level the soil. The cutting and burying component and the leveling device do not require additional power drive, the power consumption of operation is low, the problem of excessive soil slurrying is avoided when the operation is powered, the burying rate is high, and the purpose of straw burying can be met. Attached Figure Description

[0018] 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.

[0019] Figure 1 A side view of the straw returning and burying machine for paddy fields provided in Example 1;

[0020] Figure 2 A side view schematic diagram of the straw returning and burying machine for paddy fields provided in Example 1;

[0021] Figure 3 This is a front view schematic diagram of the straw returning and burying machine for paddy fields provided in Example 1;

[0022] Figure 4 This is a structural schematic diagram of the frame provided in Embodiment 1;

[0023] Figure 5 This is a front view schematic diagram of the longitudinal cutting and burying device provided in Embodiment 1;

[0024] Figure 6 This is an isometric schematic diagram of the longitudinal cutting and burying device provided in Embodiment 1;

[0025] Figure 7 A schematic diagram of the helical slice provided in Example 1;

[0026] Figure 8 This is an isometric view of the leveling device provided in Embodiment 1.

[0027] In the figure: 1-Frame; 2-Cutting and embedding assembly; 21-Longitudinal cutting and embedding device; 22-First connecting mechanism; 221-First support seat; 222-First roller shaft; 23-Longitudinal cutting and embedding component; 231-Disc notched rake blade; 24-Transverse cutting and embedding device; 263-Transverse pressure plate; 25-Second connecting mechanism; 251-Second support seat; 252-First elastic element; 26-Transverse cutting and embedding component; 261-Second roller shaft; 262-Helical slicer; 263-Transverse pressure plate; 3-Scraping device; 31-Third support seat; 32-Scraping plate; 33-Cutting and pressing component; 34-Second elastic element. Detailed Implementation

[0028] 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.

[0029] The purpose of this invention is to provide a straw burying machine for paddy fields, which solves the problems existing in the prior art. It consumes less power and has a high burying rate, thus meeting the purpose of straw return to the field.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] This embodiment provides a straw burying machine for returning straw to the paddy field. Please refer to [link / reference]. Figures 1-3 The system includes a frame 1, a cutting and burying component 2, and a leveling device 3. The frame 1 is used to connect to the traction equipment and can be dragged by the traction equipment. The cutting and burying component 2 is set on the frame 1 and can cut the straw and press it into the soil under the traction of the traction equipment. The leveling device 3 is set on the frame 1 and placed behind the cutting and burying component 2. The leveling device 3 can level the soil under the traction of the traction equipment.

[0033] The frame 1 is connected and pulled by a traction device. The cutting and burying component 2 is set on the frame 1, and the leveling device 3 is set behind the cutting and burying component 2. Under the traction of the traction device, the cutting and burying component 2 and the leveling device 3 can be dragged and moved, and can cut the straw, press it into the soil, and level the soil. The cutting and burying component 2 and the leveling device 3 do not require additional power drive, the power consumption of the operation is low, the problem of excessive soil slurrying is avoided when the power drive is used, the burying rate is high, and the purpose of returning straw to the field can be met.

[0034] The cutting and embedding assembly 2 and the leveling device 3 are both located on the lower side of the frame 1 to facilitate the cutting and embedding operation; for example Figure 4 As shown, the frame 1 may include horizontally arranged frame beams and vertically arranged connecting beams. The bottom end of the connecting beam is fixedly connected to the frame beam by bolts or welding. The connecting beam is connected to the traction equipment by a three-point suspension method. The cutting and embedding component 2 and the leveling device 3 are set below the frame beam and connected to the frame beam. The crossbeam of the frame beam can be set as a square tube to ensure the connection strength.

[0035] In the optional solutions of this embodiment, a more preferred option is described in the following description: Figures 5-6 The cutting and burying assembly 2 includes a longitudinal cutting and burying device 21, which includes a first connecting mechanism 22 and a longitudinal cutting and burying component 23. The first connecting mechanism 22 is connected to the frame 1, and the longitudinal cutting and burying component 23 is rotatably connected to the first connecting mechanism 22. The longitudinal cutting and burying component 23 can rotate relative to the first connecting mechanism 22 under the traction of the traction device so as to cut the straw and press it longitudinally into the soil.

[0036] The longitudinal cutting and embedding component 23 is rotatably connected to the first connecting mechanism 22, so that the longitudinal cutting and embedding component 23 can rotate under the traction action, thereby cutting the straw and pressing it longitudinally into the soil. In this way, there is no need to set up an additional driving component to make the longitudinal cutting and embedding component 23 rotate on its own.

[0037] In the optional embodiments of this example, the first connecting mechanism 22 includes a first support base 221 and a first roller shaft 222, and the longitudinal cutting and embedding component 23 includes a plurality of disc notched rake blades 231; the first roller shaft 222 is fixedly connected to the frame 1 through the first support base 221, and the plurality of disc notched rake blades 231 are arranged side by side at intervals along the axial direction of the first roller shaft 222, and each disc notched rake blade 231 is coaxially rotated and sleeved on the outside of the first roller shaft 222; each disc notched rake blade 231 can rotate to cut the straw and longitudinally press it into the soil.

[0038] The first support base 221 can be configured in multiple ways along the axial direction of the first roller shaft 222, i.e., the width direction of the frame 1. Its upper end is fixedly connected to the front of the frame 1 via a U-shaped clip, and its lower end is fixedly sleeved onto the first roller shaft 222. Conventional disc-shaped notched rake blades 231 are used. The structure of the disc-shaped notched rake blades 231 allows for better soil penetration and breaking up, and also functions as a soil turning tool. The disc-shaped notched rake blades 231 are installed in the same direction, separated by spacers. Each disc-shaped notched rake blade 231 rotates independently from the first roller shaft 222 via bearings. The rotation of the notched rake blade 231 is not driven by a power source, but is dragged along with the overall movement and rotates by the resistance of the soil. This dragging method avoids mud splashing caused by the rotation of the drive mechanism shaft, and at the same time can fully mix rice straw with soil. The turning and burying function of the disc notched rake blade 231 breaks up the straw and soil clumps. The broken rice straw and soil are initially turned and buried longitudinally, so that most of the straw is buried in the lower part of the soil. The disc notched rake blade 231 is installed with the arc back facing the right side of the driving direction, which can prevent soil from being pushed to the outer circle of the already worked area when turning.

[0039] In the optional scheme of this embodiment, more preferably, the cutting and burying assembly 2 further includes a transverse cutting and burying device 24, which is placed behind the longitudinal cutting and burying device 21. The transverse cutting and burying device 24 includes a second connecting mechanism 25 and a transverse cutting and burying member 26. The second connecting mechanism 25 is connected to the frame 1, and the transverse cutting and burying member 26 is rotatably connected to the second connecting mechanism 25. The transverse cutting and burying member 26 can rotate relative to the second connecting mechanism 25 under the traction of the traction device so as to cut the straw and press it into the soil laterally.

[0040] The transverse cutting and embedding component 26 is rotatably connected to the second connecting mechanism 25, so that the transverse cutting and embedding component 26 can rotate under traction, thereby cutting the straw and pressing it into the soil laterally. In this way, there is no need to set up an additional driving component to make the transverse cutting and embedding component 26 rotate on its own.

[0041] In the optional solutions of this embodiment, a more preferred option is described in the following description: Figure 7 The second connecting mechanism 25 includes a second support base 251, and the transverse cutting and embedding component 26 includes a second roller shaft 261 and a spiral slice 262. The second support base 251 is connected to the frame 1, and both ends of the second roller shaft 261 are rotatably connected to the second support base 251. The spiral slice 262 is spirally connected to the outside of the second roller shaft 261 along the axial direction of the second roller shaft 261. The second roller shaft 261 and the spiral slice 262 can rotate relative to the second connecting mechanism 25 to cut the straw and press it laterally into the soil.

[0042] The lower end of the second support 251 is rotatably connected to the corresponding end of the second roller shaft 261 via a bearing. The spiral slice 262 can rotate under the traction of the second roller shaft 261, thereby cutting the straw and pressing it laterally into the soil.

[0043] In the optional scheme of this embodiment, more preferably, the upper end of the second support 251 is rotatably connected to the frame 1, and each second support 251 is also connected to the frame 1 by a first elastic element 252, the elastic force of the first elastic element 252 can press the spiral slice 262 into the soil.

[0044] Each second support base 251 is mounted on the lower part of the frame 1 via a hinged pivot at its upper end, and its lower end is rotatably connected to the corresponding end of the second roller shaft 261 via a bearing. Combined with the elastic force of the first elastic element 252, the transverse cutting and burying device 24 can adapt to the terrain and float, while also pressing firmly to the ground, thus improving the cutting and burying effect. The first elastic element 252 can be configured as a spring rod, with its lower end installed in the middle of the second support base 251 and rotatably connected via a pin. Its upper end is connected to the frame 1 and rotatably connected via a pin. The spring rod remains under pressure, and the pressure of the spring rod acts on the second support base 251 to press the spiral slices 262 into the mud and water, maintaining a certain compressive force, thereby pressing the rice straw into the soil and maintaining a certain depth of penetration, achieving the purpose of cutting and burying the rice straw.

[0045] In the optional scheme of this embodiment, more preferably, multiple transverse pressure plates 263 are fixedly distributed in the spiral gap of the spiral slice 262 along the spiral direction, and two adjacent transverse pressure plates 263 along the spiral direction form a cavity with the spiral slice 262 and the second roller shaft 261; in the axial direction parallel to the second roller shaft 261, at least the multiple transverse pressure plates 263 in the adjacent spiral gap are all in different planes.

[0046] The transverse pressure plate 263 can be welded and fixed to the spiral slice 262 or the second roller shaft 261. Two adjacent transverse pressure plates 263 along the spiral direction, together with the spiral slice 262 and the second roller shaft 261, form a cavity. The cavity acts as a sealed space during operation, preventing straw and mud from sticking to the second roller shaft 261 and causing straw entanglement. Moreover, each transverse pressure plate 263 can be inclined in a direction opposite to the direction of rotation. For example, if the rotation direction is forward, the transverse pressure plate 263 is inclined backward, allowing straw and mud to flow back to the paddy field along the transverse pressure plate 263 during the rotation of the second roller shaft 261, preventing the transverse pressure plate 263 from picking up straw and mud. The process involves carrying the material; furthermore, along the axial direction parallel to the second roller shaft 261, multiple transverse pressure plates 263 within at least adjacent spiral gaps are located on different planes to reduce the number of transverse pressure plates 263 in contact with the ground at the same time, thereby reducing the contact area with the ground and increasing the soil penetration efficiency; furthermore, by controlling the radial angle between adjacent transverse pressure plates 263 along the spiral direction, the number of transverse pressure plates 263 in contact with the ground at the same time is only one, which can minimize the contact area with the ground and increase the soil penetration efficiency. Specifically, the radial angle between adjacent transverse pressure plates 263 along the spiral direction can be 100°.

[0047] In the optional scheme of this embodiment, more preferably, the transverse cutting and burying device 24 is set into two sets, and the two sets of transverse cutting and burying devices 24 are arranged side by side along the width direction of the frame 1. The two spiral slices 262 between the two sets of transverse cutting and burying devices 24 have opposite rotation directions, and the two spiral slices 262 can rotate to cut the straw and press it into the soil laterally towards the inside.

[0048] The spiral slices 262 of the two sets of transverse cutting and burying devices 24 adopt two rotation directions, left and right, and are horizontally symmetrical along the centerline of the forward direction. The left side of the forward direction adopts a right-hand spiral structure, and the right side of the forward direction adopts a left-hand spiral. This arrangement can push the soil towards the center during operation, avoiding the impact of pushing the soil to the outside of the working area and affecting the working effect. In addition, a retaining ring can be fixedly fitted at both ends of each second roller shaft 261 to retain soil. The symmetrical arrangement also allows the two sets of transverse cutting and burying devices 24 to rotate independently during turning operations. During turning operations, the turning radii of the left and right sides of the tractor are different, resulting in different rotation speeds of the two sets of transverse cutting and burying devices 24. The independent rotation of the two sets of second roller shafts 261 can reduce the bending deformation of the second roller shafts 261 caused by the different rotation speeds, and avoid damage to the second roller shafts 261. The transverse cutting and burying devices 24 are the same as the longitudinal cutting and burying devices 21, and adopt a towing operation method. This method avoids mud splashing caused by the rotation of the drive mechanism shaft, and at the same time can fully mix the rice straw with the soil.

[0049] In the optional solutions of this embodiment, a more preferred option is described in the following description: Figure 8The leveling device 3 includes a third support base 31 and a scraping plate 32. The scraping plate 32 is connected to the third support base 31, and the third support base 31 is connected to the frame 1. Multiple cutting and pressing components 33 are provided at the bottom of the scraping plate 32 along the length direction. The cutting and pressing components 33 can divide the soil and squeeze the straw, and the scraping plate 32 can level the soil.

[0050] The upper end of the third support 31 is connected to the rear end of the frame 1, and the lower end is connected to the scraper plate 32. The scraper plate 32 is a folded plate with a sloping front end. The lower end of the sloping surface is close to the ground. Multiple cutting and pressing components 33, i.e. cutting and pressing fins, are vertically welded to the bottom of the sloping surface. The cutting and pressing fins can divide the mud into small units, which can better smooth the mud. The cutting and pressing fins can also press the straw on the surface of the mud back into the soil, thereby achieving the purpose of returning rice straw to the field.

[0051] In the optional scheme of this embodiment, more preferably, the two ends of the third support 31 are rotatably connected to the frame 1 and the scraper plate 32 respectively; a second elastic member 34 is also connected between the scraper plate 32 and the frame 1, and the elastic force of the second elastic member 34 can press the scraper plate 32 tightly against the ground.

[0052] The third support 31 is rotatably connected to the frame 1 and the scraper plate 32 at both ends by pins; the second elastic element 3233 can be set as a spring rod, with its lower end installed on the scraper plate 32 and rotatably connected by a pin, and its upper end connected to the frame 1 and rotatably connected by a pin; the spring rod is kept under pressure, and the pressure of the spring rod acts on the scraper plate 32 so that the scraper plate 32 can be pressed into the mud and water, and a certain squeezing force is maintained to improve the leveling and soil breaking effect.

[0053] The working principle of the paddy field straw returning and burying machine provided in this embodiment is as follows:

[0054] The entire system is powered by a tractor. The longitudinal cutting and burying device 21 is pulled forward by the tractor and rotates while the soil is loose and has not yet settled, cutting the straw longitudinally into the soil. The transverse cutting and burying device 24 is pulled forward by the tractor and cuts the straw horizontally and buries it into the soil. Finally, the leveling device 3 smooths the surface to complete the land preparation. In this system, by setting up the longitudinal cutting and burying device 21, the transverse cutting and burying device 24, and the leveling device 323, the straw in the paddy field is cut longitudinally, cut laterally, and leveled in sequence, which improves the cutting and burying effect of the straw.

[0055] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A straw-burying machine for returning straw to paddy fields, characterized in that: include: The frame (1) is used to connect to the traction equipment and can be dragged by the traction equipment. The cutting and burying assembly (2) is installed on the frame (1). The cutting and burying assembly (2) can cut the straw and press it into the soil under the traction of the traction device. and The leveling device (3) is set on the frame (1) and placed behind the cutting and burying assembly (2). The leveling device (3) can level the soil under the traction of the traction device. The cutting and embedding assembly (2) includes a transverse cutting and embedding device (24), which includes a second connecting mechanism (25) and a transverse cutting and embedding component (26). The second connecting mechanism (25) includes a second support base (251), and the transverse cutting and embedding component (26) includes a second roller (261) and a spiral slice (262). The second support base (251) is connected to the frame (1), and both ends of the second roller (261) are rotatably connected to the second support base (251). The spiral slice (262) is spirally connected to the outside of the second roller (261) along the axial direction of the second roller (261). 261) and the spiral slice (262) can rotate relative to the second connecting mechanism (25) to cut the straw and press it laterally into the soil; a plurality of transverse pressure plates (263) are fixedly distributed in the spiral gap of the spiral slice (262) along the spiral direction, and two adjacent transverse pressure plates (263) along the spiral direction form a cavity with the spiral slice (262) and the second roller shaft (261); in the axial direction parallel to the second roller shaft (261), at least the plurality of transverse pressure plates (263) in the adjacent spiral gap are all in different planes; each transverse pressure plate (263) is inclined and inclined in a direction opposite to the direction of rotation.

2. The paddy field straw returning and burying machine according to claim 1, characterized in that: The cutting and burying assembly (2) includes a longitudinal cutting and burying device (21), which includes a first connecting mechanism (22) and a longitudinal cutting and burying member (23). The first connecting mechanism (22) is connected to the frame (1), and the longitudinal cutting and burying member (23) is rotatably connected to the first connecting mechanism (22). The longitudinal cutting and burying member (23) can rotate relative to the first connecting mechanism (22) under the traction of the traction device so as to cut the straw and press it longitudinally into the soil.

3. The paddy field straw returning and burying machine according to claim 2, characterized in that: The first connecting mechanism (22) includes a first support base (221) and a first roller shaft (222). The longitudinal cutting and embedding component (23) includes a plurality of disc notched rake blades (231). The first roller shaft (222) is fixedly connected to the frame (1) through the first support base (221). The plurality of disc notched rake blades (231) are arranged side by side at intervals along the axial direction of the first roller shaft (222), and each disc notched rake blade (231) is coaxially rotated and sleeved on the outside of the first roller shaft (222). Each disc notched rake blade (231) can rotate to cut the straw and longitudinally press it into the soil.

4. The paddy field straw returning and burying machine according to claim 2, characterized in that: The transverse cutting and burying device (24) is positioned behind the longitudinal cutting and burying device (21).

5. The paddy field straw returning and burying machine according to claim 4, characterized in that: The upper end of the second support (251) is rotatably connected to the frame (1), and a first elastic element (252) is also connected between each second support (251) and the frame (1). The elastic force of the first elastic element (252) can press the spiral slice (262) into the soil.

6. The paddy field straw returning and burying machine according to claim 5, characterized in that: The transverse cutting and burying device (24) is configured in two sets, with the two sets of transverse cutting and burying devices (24) arranged side by side along the width direction of the frame (1). The two spiral slices (262) between the two sets of transverse cutting and burying devices (24) have opposite rotation directions, and the two spiral slices (262) can rotate to cut the straw and press it into the soil laterally towards the inside.

7. The paddy field straw returning and burying machine according to claim 1, characterized in that: The leveling device (3) includes a third support base (31) and a scraping plate (32). The scraping plate (32) is connected to the third support base (31), and the third support base (31) is connected to the frame (1). The bottom end of the scraping plate (32) is provided with a plurality of cutting and pressing components (33) along the length direction. The cutting and pressing components (33) can divide the soil and squeeze the straw. The scraping plate (32) can level the soil.

8. The paddy field straw returning and burying machine according to claim 7, characterized in that: The third support base (31) is rotatably connected to the frame (1) and the scraper plate (32) at both ends respectively; a second elastic element (34) is also connected between the scraper plate (32) and the frame (1), and the elastic force of the second elastic element (34) can press the scraper plate (32) tightly against the ground.

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