A large-range grass seed sowing device and method based on grassland ecological restoration

Abstract

This invention discloses a large-scale grass seeding device for grassland ecological restoration, belonging to the field of grassland ecological restoration technology. The device includes a seeding frame with two rows of plow blades mounted on its lower surface, the blades being staggered in position. Each plow blade has a cutting section at its front end, which is triangular in shape, and a supporting section at its rear end, which has a symmetrical butterfly-wing structure. The cutting section cuts linear planting grooves into the soil. A connecting rod is rotatably connected to the rear end of the seeding frame via a bearing, and a pressing roller is rotatably connected to the end of the connecting rod. This invention employs a triangular cutting section for linear grooving, only subjecting the soil to narrow-slit, linear, and minimal disturbance. The working surface is narrow and the depth is controllable, without damaging the original structure of the grassland surface. It can completely preserve the crust layer and litter layer, maximizing the soil's water retention, soil stabilization, and wind erosion resistance, thus preventing secondary degradation of the grassland ecosystem from the source and truly achieving protective ecological restoration.

Description

Technical Field

[0001] This invention belongs to the field of grassland ecological restoration technology, specifically relating to a large-scale grass seed sowing device and method based on grassland ecological restoration. Background Technology

[0002] Grassland ecological restoration is an important measure to curb grassland degradation and restore vegetation cover. Mechanized sowing of grass seeds is the current mainstream restoration method. Traditional grassland sowing operations generally adopt land preparation methods such as loosening the soil and rotary tillage. Sowing conditions are formed by fully tilling the soil. This method directly damages the original crust layer and litter layer of the grassland, destroys the stable structure of the soil surface and the water-retaining and soil-fixing barrier, and greatly increases the risk of grassland wind erosion and water erosion, which is contrary to the core goal of ecological restoration.

[0003] Chinese patent CN119522695A discloses a grassland grass seed sowing device. It adopts a conventional trenching and land preparation structure. Although it can complete the grass seed sowing operation, it still relies on a large area of ​​soil disturbance to open the trench. During the operation, it causes a high degree of damage to the surface crust layer and litter layer, and cannot achieve low-disturbance operation. It is easy to cause surface soil loss and damage to native herbs, which is difficult to meet the protective restoration needs of fragile grassland areas.

[0004] Existing seeding devices generally suffer from drawbacks such as significant soil disturbance, poor surface ecological protection, and insufficient coordination between seeding and covering. These defects not only reduce seed germination and survival rates but also further exacerbate grassland degradation. Therefore, developing a seeding device and method that does not damage the crust and litter layers, minimizes soil disturbance, and is suitable for grassland ecological protection has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0007] A large-scale grass seeding device for grassland ecological restoration includes a seeding frame. Two rows of plow blades are installed on the lower surface of the seeding frame, with their installation positions staggered. The front end of each plow blade has a cutting section with a triangular structure, and the rear end has a supporting section with a symmetrical butterfly-wing structure. The cutting section cuts linear planting grooves in the soil to reduce damage to the fragile soil environment of the grassland. The supporting section then expands the sides of the planting grooves, facilitating the entry of grass seeds and humus. A connecting rod is rotatably connected to the rear end of the seeding frame via a bearing. The end of the connecting rod is rotatably connected to a pressing roller. The pressing roller compacts the planting grooves after seeding, restoring the expanded planting grooves to a linear shape, reducing wind and sand erosion and preventing grass seed loss.

[0008] Preferably, a buffer section is provided at the connection between the cutting part and the supporting part of the plow blade. The surface of the buffer section has an arc-shaped structure and the connection between the cutting part and the supporting part is smooth. A connecting rod is provided on the upper surface of the plow blade, and an installation hole is provided on the connecting rod. During assembly, the plow blade is fixed on the seeding frame by passing a U-shaped hoop through the installation hole.

[0009] Preferably, the upper end of the seeding frame is equipped with multiple first and second hoppers, and a turntable is rotatably installed inside the first hopper to sow grass seeds placed in the first hopper outward. A rotating wheel is rotatably connected inside the second hopper to sow humus placed in the second hopper outward. The sowing path of the humus is the same as the sowing path of the grass seeds.

[0010] Preferably, the inner wall of the first hopper is provided with a ring edge, and the turntable is located inside the ring edge. Multiple seed slots are equidistantly arranged in a circular pattern on the turntable, and a notch is provided on the ring edge. The first hopper is provided with a discharge hole corresponding to the notch, and a receiving box is provided on the outside of the first hopper, covering the discharge hole. A first guide tube is sleeved at the end of the receiving box. The first guide tube is located above the spreading part of the plow blade. When the turntable rotates, the grass seeds entering the seed slots move accordingly. When the seed slot containing grass seeds rotates to the notch on the ring edge, the grass seeds are thrown out and introduced into the first guide tube through the receiving box. The grass seeds are discharged through the first guide tube and fall into the planting trough.

[0011] Preferably, a bevel gear set is provided outside the turntable and inside the receiving box. The bevel gear set consists of a first bevel gear and a second bevel gear. The first bevel gear passes through the first hopper and is connected to the center of the turntable. The second bevel gears outside the multiple first hoppers are connected to a first coupling shaft.

[0012] Preferably, a second connecting shaft is provided outside the second hopper, which connects multiple second hoppers in series. A rotating wheel is fixedly sleeved on the second connecting shaft. The rotating wheel has a circumferentially shaped material trough, and there are symmetrical limiting plates inside the rotating wheel. The limiting plates clamp the two sides of the rotating wheel. A receiving cylinder is installed outside the second hopper, and the receiving cylinder is connected to the inside of the second hopper. The connection point is located between the limiting plates. A second guide tube is fixedly sleeved at the end of the receiving cylinder. The second guide tube is also located above the opening part of the plow blade. When the rotating wheel rotates, the humus that enters the material trough moves with it. As the rotating wheel rotates, the humus is thrown into the receiving cylinder and discharged through the first guide tube, falling into the planting trough and covering the grass seeds.

[0013] Preferably, both the first and second connecting shafts are connected to the seeding frame via bearings. A first sprocket is fitted onto one end of the first connecting shaft, and a second sprocket is fitted onto one end of the second connecting shaft. The first and second sprockets mesh with a second chain, which also meshes with a driven sprocket. A drive shaft passes through the driven sprocket and is also fixed to the seeding frame via bearings. A drive sprocket is fixedly fitted onto the drive shaft, and the first chain meshes with the drive sprocket. The other end of the first chain is connected to a drive wheel, which is equipped with... A support frame is installed on the seeding frame, which is also equipped with a traction frame. The seeding frame is connected to the agricultural machinery via the traction frame. When the agricultural machinery drives the spreading device, the drive wheel rolls with the ground, driving the drive sprocket to rotate via the first chain. The drive sprocket drives the driven bevel gear to rotate synchronously via the drive shaft, and then transmits the power to the first and second sprockets via the second chain, ultimately driving the first and second connecting shafts to rotate. The seeding frame is equipped with a tension sprocket, which is arranged outside the second chain and meshes with the second chain.

[0014] Preferably, the seeding rack is symmetrically provided with fixed frames, and the end of the fixed frame is rotatably connected with an auxiliary wheel. A third hopper is provided above the seeding rack, and the bottom of the third hopper has a through hole, which is directly opposite to the second hopper.

[0015] In addition, this application also provides a method for large-scale grass seeding based on grassland ecological restoration, which is operated using the large-scale grass seeding device for grassland ecological restoration described above, and the steps are as follows: Steps: The agricultural machinery pulls the seeding frame forward through the traction frame. The drive wheel rolls with the ground and is driven by the first chain, drive sprocket, drive shaft, second chain, and the first and second sprockets, which drive the first and second connecting shafts to rotate synchronously. Step 1: The triangular cutting part of the plow blade cuts into the soil to form a linear planting trough. The butterfly-shaped spreading part slightly expands the sides of the planting trough. During the operation, the grassland crust layer and litter layer are preserved. Step 2: The turntable in the first hopper rotates to discharge grass seeds in a measured amount, and the wheel in the second hopper rotates to discharge humus in a measured amount. The grass seeds and humus fall into the linear planting trough in sequence. Step 3: The pressing roller moves with the seeding frame and presses down the seeding troughs after they have been sown, so that the expanded seeding troughs are restored and closed, thus completing the low-disturbance sowing of grass seeds.

[0016] Preferably, during operation, the tension sprocket continuously tensions the second chain to stabilize power transmission, the staggered plow blades continuously and linearly groove, the buffer section reduces the impact of operation, and the auxiliary wheel cooperates with the drive wheel to keep the device moving smoothly.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention differs from traditional full-section tillage operations such as loosening soil and rotary tillage. It adopts a triangular cutting method for linear trenching, which only applies narrow-slit, linear, and minimal disturbance to the soil. The working surface is narrow and the depth is controllable. It does not damage the original structure of the grassland surface and can completely preserve the crust layer and litter layer. It maximizes the soil's water retention, soil stabilization, and wind erosion resistance, thus avoiding secondary degradation of the grassland ecology from the source of the operation and truly achieving protective ecological restoration.

[0018] (2) The plow blade of the present invention adopts a triangular soil cutting, butterfly wing opening and arc-shaped buffer integrated structure, which cuts the soil smoothly with low resistance and can quickly form a regular linear planting trench; the butterfly wing opening part only expands the trench wall slightly without disturbing the surrounding soil; the buffer part effectively reduces the vibration and impact of operation, and with the back end pressing roller to immediately press and reset, the planting trench is quickly closed. After operation, the surface morphology is close to the original state, the soil structure is stable, and the risk of wind and sand erosion and grass seed loss is greatly reduced.

[0019] (3) The present invention adopts a self-driving method of ground friction of drive wheel, which does not require external power and has no additional rolling and disturbance of soil by power device; the whole chain drive system is coordinated with tension sprocket to be tensioned in real time, and the power transmission is continuous and stable, ensuring that grass seeds and humus are discharged quantitatively and evenly, without jamming, missed sowing or double sowing. The device operates smoothly and has a low failure rate, and is suitable for operation in complex grassland terrain; furthermore, the first hopper and the second hopper respectively realize the precise sowing of grass seeds and humus in the same path, at the same point and in layers. Humus directly covers the grass seeds, providing nutrients, water retention and protective layer for grass seed germination; combined with low disturbance grooving and immediate soil covering and compaction, it significantly improves the grass seed implantation rate, rooting rate and survival rate, and the repair effect is far better than the traditional broadcasting and shallow sowing methods.

[0020] (4) The two rows of staggered plow blades of this invention can achieve continuous and uninterrupted linear grooving, with a wide working width and high efficiency; the third hopper at the top can replenish humus in batches to meet the needs of large-scale restoration. The whole machine achieves the best balance between high working efficiency and extremely low soil damage, and is especially suitable for ecological restoration projects in degraded grassland, desertified grassland and fragile grassland areas. Attached Figure Description

[0021] Figure 1 This is the three-dimensional structure of the spreading device in this invention. Figure 1 .

[0022] Figure 2 This is the three-dimensional structure of the spreading device in this invention. Figure 2 .

[0023] Figure 3 This is a side view of the spreading device in this invention.

[0024] Figure 4 This is the three-dimensional structure of the spreading device in this invention. Figure 3 .

[0025] Figure 5 This is an assembly diagram of the material holding component and its spreading drive component in this invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the material holding component in this invention.

[0027] Figure 7 This is a structural diagram of the first hopper in this invention.

[0028] Figure 8 This is a structural diagram of the second hopper in this invention.

[0029] Figure 9 This is a structural diagram of the plow blade in this invention.

[0030] Figure 10 This is a top view of the plow blade in this invention.

[0031] The correspondence between the labels and component names in the attached figures is as follows: 100. Seeding rack; 101. First hopper; 101a. Ring edge; 101b. Turntable; 101c. Bevel gear set; 101d. First coupling shaft; 101e. Receiving box; 101f. First guide tube; 101g. First sprocket; 102. Second hopper; 102a. Rotary wheel; 102b. Second coupling shaft; 102c. Limiting plate; 102d. Receiving cylinder; 102e. Second guide tube; 102f. Second sprocket; 103. Three-stage hopper; 104, plow blade; 104a, cutting section; 104b, spreading section; 104c, buffer section; 104d, connecting rod; 105, pressure roller; 105a, connecting rod; 106, auxiliary wheel; 106a, fixing frame; 107, drive wheel; 107a, drive shaft; 107b, drive sprocket; 107c, first chain; 107d, driven sprocket; 108, traction frame; 109, tension sprocket; 109a, second chain. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0035] Example 1 This embodiment provides a large-scale grass seeding device for grassland ecological restoration. Addressing the core issue of the fragile structure of grassland soil crust and litter layer, which is easily destroyed by traditional loosening and rotary tillage operations, this device employs an integrated structural design with low-disturbance linear micro-grooving, precise quantitative feeding, and immediate soil covering and repositioning. This replaces large-area soil tillage and disturbance operations, maximizing the protection of the original grassland soil structure and surface ecology with minimal soil contact area, the most controllable soil penetration depth, and the fastest surface repositioning method. It is suitable for restoration operations in fragile ecological areas such as degraded grasslands and desertified grasslands.

[0036] See Figure 1The sowing device in this embodiment includes a sowing frame 100. Two rows of plow blades 104 are mounted on the lower surface of the sowing frame 100. The two rows of plow blades 104 are arranged in a staggered pattern. This staggered arrangement avoids soil overlap and disturbance caused by adjacent trenching operations, while ensuring the continuity and uniformity of trenching. Continuous planting trenches can be formed without fully loosening the soil, thereby reducing soil damage. (See reference...) Figure 9 and Figure 10 In this embodiment, the plow blade 104 has a triangular cutting section 104a at its front end. The triangular structure provides low resistance to soil entry and smooth cutting, cutting the soil linearly to form a narrow linear planting trench. Compared to the large-area soil breaking method of traditional furrow openers and rotary tillers, the working surface of the cutting section 104a is extremely small, which can completely preserve the grassland crust layer and litter layer on both sides and around the trench, without damaging the soil surface's soil-fixing and water-retaining structure. The rear end of the plow blade 104 has a symmetrical butterfly-shaped expansion section 104b. The expansion section 104b only slightly expands the trench wall of the linear planting trench. The expansion range is controllable and does not disturb the surrounding original soil. It can provide sufficient space for grass seeds and humus to fall without causing large-area soil loosening and bulging, thus maintaining the surface morphology. To ensure the integrity of the soil, an arc-shaped buffer section 104c is provided at the connection between the cutting part 104a and the supporting part 104b. The buffer section 104c is smoothly connected to the cutting part 104a and the supporting part 104b, which can effectively reduce the impact and vibration of the plow blade 104 during operation, avoid soil cracking and surface structure loss caused by hard impact, and further reduce damage to the fragile grassland soil. The upper surface of the plow blade 104 is provided with a connecting rod 104d, and the connecting rod 104d has an installation hole. The plow blade 104 is detachably fixed to the bottom of the seeding frame 100 by passing through the installation hole with a U-shaped hoop. The depth of the plow blade 104 can be flexibly adjusted according to the thickness and compaction of the grassland soil, and always maintain a micro-grooving and low-disturbance operation state to adapt to the restoration needs of different types of grassland soil.

[0037] See Figure 1-3 In this embodiment, a connecting rod 105a is rotatably connected to the rear end of the seeding frame 100 via a bearing. The end of the connecting rod 105a is rotatably connected to the covering roller 105. The covering roller 105 can roll synchronously with the movement of the device to immediately compact the planting trough after the grass seeds have been sown. The planting trough, which has been slightly expanded by the expansion part 104b, quickly resets and closes under the uniform pressure of the covering roller 105, restoring it to its original linear state. After the planting trough is closed, the surface is flat, without obvious grooves or loose soil. This can significantly reduce the erosion of the planting trough by wind and sand, prevent the grass seeds from being blown away by the wind, and quickly restore the soil surface structure, keeping the grassland crust layer and litter layer continuous and intact, minimizing the traces of the operation, and achieving zero damage and rapid restoration of the soil.

[0038] See Figure 4In this embodiment, multiple sets of first hoppers 101 and second hoppers 102 are installed on the upper part of the seeding rack 100, and a third hopper 103 is mounted on top. The bottom of the third hopper 103 has a through hole and is directly opposite the second hopper 102, which can realize the batch replenishment and uniform distribution of humus, meeting the needs of large-scale continuous operation. See reference. Figure 6 and Figure 7 In this embodiment, the first hopper 101 is used to store grass seeds. Its inner wall is fixedly provided with a ring edge 101a. A turntable 101b is rotatably installed inside the ring edge 101a. Multiple seed slots are evenly distributed circumferentially on the turntable 101b. The volume of the seed slots is fixed, enabling precise quantitative delivery of grass seeds and avoiding over-sowing that would increase soil burden or missed sowing that would affect the remediation effect. A notch is provided in the ring edge 101a, and a discharge hole is provided at a corresponding position in the first hopper 101. A receiving box 101e is installed on the outer side, and a first conduit 101f is sleeved at the end of the receiving box 101e. The first conduit 101f is precisely positioned at the opening part 104b of the plow blade 104. Directly above, ensuring that grass seeds fall directly into the formed linear planting trough without scattering or shifting, eliminating the need for additional soil covering and reducing soil disturbance, a bevel gear set 101c is installed on the outer side of the turntable 101b and the inner side of the receiving box 101e. The bevel gear set 101c consists of a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear passes through the first hopper 101 and is fixedly connected to the center of the turntable 101b. The second bevel gears corresponding to multiple first hoppers 101 are connected to the first connecting shaft 101d. The first connecting shaft 101d can synchronously drive multiple sets of turntables 101b to rotate, ensuring that the grass seed sowing amount at each point is uniform.

[0039] See Figure 6 and Figure 8 In this embodiment, the second hopper 102 is used to store humus. A rotating wheel 102a is mounted inside the hopper, and the wheel 102a is fixedly connected to the second connecting shaft 102b. The second connecting shaft 102b connects multiple sets of second hoppers 102 in series for synchronous drive. A circumferentially distributed trough on the wheel 102a, along with symmetrically arranged limiting plates 102c on the inner side, enables quantitative delivery of humus, preventing excessive accumulation of humus and subsequent decrease in soil permeability. A receiving cylinder 102d is installed on the outside of the second hopper 102, communicating with the inside of the second hopper 102. A second conduit 102e is fitted at its end, also located above the plowshare 104b, following the same path as the first conduit 101f. This ensures precise humus coverage over the grass seeds, forming a mixed formula of grass seeds and humus. This provides nutrients and a moisture-retaining layer to the grass seeds without disturbing the soil, further reducing soil disturbance.

[0040] See Figure 5The device in this embodiment adopts a ground-driven power transmission system, which does not require external power equipment, and there is no additional mechanical compaction or soil disturbance. The drive wheel 107 is installed on the seeding frame 100 through a bracket. The drive wheel 107 rolls with the ground and relies on the friction of movement to provide power. The drive wheel 107 is connected to the drive sprocket 107b through the first chain 107c. The drive sprocket 107b is fixed to the drive shaft 107a. The drive shaft 107a is stably installed on the seeding frame 100 through bearings. The driven sprocket 107d on the drive shaft 107a meshes with the second chain 109a. The second chain 109a meshes with the first sprocket 101g and the second sprocket 102f at the same time. The first sprocket 101g and the second sprocket 102f are respectively sleeved on the ends of the first connecting shaft 101d and the second connecting shaft 102b to realize synchronous power transmission. The seeding frame 100 is also equipped with a tension sprocket 109, which is located outside and meshes with the second chain 109a. This allows for real-time adjustment of chain tension, ensuring smooth and reliable power transmission and preventing transmission jams that could cause components to impact the soil. Symmetrical fixing frames 106a are arranged on both sides of the seeding frame 100. The ends of the fixing frames 106a are rotatably connected to auxiliary wheels 106. The auxiliary wheels 106 and drive wheels 107 work together to support the device, maintaining stability during operation and preventing the plow blades 104 from penetrating too deeply or causing excessive disturbance due to machine tilting. This ensures a stable and gentle working state throughout, comprehensively protecting the fragile grassland soil environment. A traction frame 108 is located at the front of the seeding frame 100, allowing for quick connection to agricultural machinery. The traction process is smooth and without jerking, further reducing impact and damage to the soil.

[0041] Example 2 This embodiment provides a large-scale grass seeding method based on grassland ecological restoration. The operation is carried out using the low-disturbance seeding device described in Embodiment 1. The core principles throughout the process are to avoid damaging the grassland crust layer, avoid damaging the litter layer, and minimize soil disturbance. It abandons traditional destructive land preparation methods such as loosening the soil and rotary tillage. Through an integrated operation process of linear micro-grooving, precise seeding, and immediate repositioning, the dual goals of grassland ecological restoration and soil protection are achieved.

[0042] Before the operation begins, the seeding frame 100 is stably connected to the agricultural machinery via the traction frame 108. The depth of the plow blade 104 is adjusted according to the characteristics of the grassland soil to ensure that the cutting part 104a only makes shallow linear grooves without damaging the deep soil structure. At the same time, the tension of the tension sprocket 109 is checked to ensure smooth transmission of the second chain 109a. The first hopper 101 is filled with sufficient grass seeds, and the third hopper 103 and the second hopper 102 are filled with sufficient humus to prepare for continuous low-disturbance operation.

[0043] After the agricultural machinery is started, the seeding frame 100 is pulled forward at a constant speed by the traction frame 108. The drive wheel 107 installed under the seeding frame 100 keeps rolling contact with the ground and rotates passively by relying on the friction of the ground. The drive wheel 107 drives the drive sprocket 107b to rotate synchronously through the first chain 107c. The drive sprocket 107b drives the drive shaft 107a to rotate stably. The driven sprocket 107d on the drive shaft 107a transmits power to the second chain 109a. The second chain 109a drives the first sprocket 101g and the second sprocket 102f to rotate, which in turn drives the first coupling shaft 101d and the second coupling shaft 102b to rotate synchronously at a constant speed. The entire power system is driven by ground movement. There is no additional power equipment to crush the soil and no mechanical vibration to impact the ground surface. It maintains a gentle and stable operating state throughout the process, avoiding damage to the surface soil of the grassland from the power source.

[0044] During the movement of the device, the two rows of staggered plow blades 104 below the seeding frame 100 simultaneously enter the soil. The triangular cutting section 104a at the front end of the plow blade 104 cuts into the soil with minimal resistance, creating only narrow linear planting trenches. The width and depth of the trenches are controllable, preventing compression or tillage of the surrounding soil and preserving the grassland crust layer and litter layer between the planting trenches, thus maintaining the soil's surface water retention and soil stabilization functions. Subsequently, the butterfly-shaped expanding section 104b at the rear end of the plow blade 104 slightly expands the walls of the linear planting trenches laterally. The expansion range is only sufficient to allow grass seeds and humus to fall in, without loosening the surrounding original soil. The arc-shaped buffer section 104c smoothly connects the cutting and expanding actions, reducing operational impact and preventing soil fragmentation and detachment, minimizing damage to fragile soil.

[0045] With the synchronous rotation of the first connecting shaft 101d and the second connecting shaft 102b, the bevel gear set 101c drives the turntable 101b in the first hopper 101 to rotate at a uniform speed. The seed trough on the turntable 101b carries grass seeds in a fixed amount and rotates. When it reaches the gap of the ring edge 101a, the grass seeds are thrown out under the action of gravity and fall accurately into the linear planting trough through the receiving box 101e and the first guide tube 101f. At the same time, the rotating wheel 102a in the second hopper 102 rotates synchronously. The trough carries humus in a fixed amount and evenly covers the grass seeds through the receiving cylinder 102d and the second guide tube 102e. The grass seeds and humus are accurately placed along the same path and at the same point. The seeding and covering can be completed without turning the soil. There is no additional soil disturbance throughout the process, which ensures the nutrients and moisture required for grass seed germination and does not damage the original structure of the grassland soil.

[0046] After the grass seeds and humus are sown, the covering roller 105 at the rear end of the sowing frame 100 moves synchronously with the device to evenly press the planting trough after the material has been fed. The planting trough, which has been slightly expanded by the expansion part 104b, is quickly reset and closed, so that the ground surface is restored to a near-original linear state. After the planting trough is closed, there are no obvious grooves or loose soil accumulation. This can effectively block wind and sand erosion, prevent grass seeds from being lost, and quickly restore the continuity of the grassland crust layer, keeping the soil surface structure intact and stable.

[0047] Throughout the entire operation, the tensioning sprocket 109 maintains the tension of the second chain 109a, ensuring stable power transmission and preventing transmission failures that could cause the device to stop or impact the soil. The staggered plow blades 104 achieve continuous and uninterrupted linear grooving, with no missed or overlapping grooves, further reducing repeated soil disturbance. The arc-shaped buffer section 104c continuously buffers the impact of the operation, reducing the hard damage to the soil caused by the plow blades 104. The auxiliary wheel 106 and the drive wheel 107 work together to support the device, keeping the machine horizontal and stable, preventing sudden changes in the depth of the plow blades 104 from exacerbating soil damage. This method involves no loosening of soil, no rotary tillage, and no large-area soil breaking. The sowing operation is completed solely through linear micro-grooving, minimizing damage to the fragile grassland soil environment and perfectly meeting the protective operation requirements of grassland ecological restoration.

[0048] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A large-scale grass seeding device for grassland ecological restoration, comprising a seeding frame (100), characterized in that: The lower surface of the seeding frame (100) is equipped with two rows of plow blades (104), and the installation positions of the two rows of plow blades (104) are staggered. The front end of each plow blade (104) is provided with a soil-cutting part (104a), which has a triangular structure. The rear end of each plow blade (104) is provided with a supporting part (104b), which has a symmetrical butterfly-wing structure. The soil-cutting part (104a) cuts linear planting grooves in the soil to reduce the impact on the fragile grassland. The soil environment is damaged, and the two sides of the planting trough are expanded by the support part (104b) to facilitate the entry of grass seeds and humus. The rear end of the seeding frame (100) is rotatably connected to the connecting rod (105a) through the bearing. The end of the connecting rod (105a) is rotatably connected to the covering roller (105). The covering roller (105) presses the planting trough after the grass seeds are sown, so that the expanded planting trough is restored to a linear shape, thereby reducing the erosion of the planting trough by wind and sand and avoiding the loss of grass seeds.

2. The large-scale grass seeding device based on grassland ecological restoration according to claim 1, characterized in that: A buffer section (104c) is provided at the connection between the cutting part (104a) and the supporting part (104b) of the plow blade (104). The surface of the buffer section (104c) is arc-shaped and the connection between it and the cutting part (104a) and the supporting part (104b) is smooth. A connecting rod (104d) is provided on the upper surface of the plow blade (104). An installation hole is provided on the connecting rod (104d). During assembly, the plow blade (104) is fixed on the seeding frame (100) by passing a U-shaped hoop through the installation hole.

3. The large-scale grass seeding device based on grassland ecological restoration according to claim 1, characterized in that: The upper end of the seeding rack (100) is equipped with a plurality of first hoppers (101) and second hoppers (102). A turntable (101b) is rotatably installed inside the first hopper (101) to sow grass seeds placed in the first hopper (101) outward. A rotating wheel (102a) is rotatably connected inside the second hopper (102) to sow humus placed in the second hopper (102) outward. The sowing path of the humus is the same as the sowing path of the grass seeds.

4. The large-scale grass seeding device based on grassland ecological restoration according to claim 3, characterized in that: The inner wall of the first hopper (101) is provided with a ring edge (101a), and a turntable (101b) is located inside the ring edge (101a). Multiple seed slots are equidistantly arranged in a circular pattern on the turntable (101b), and a notch is provided on the ring edge (101a). A discharge hole corresponding to the notch is provided on the first hopper (101), and a receiving box (101e) is provided on the outer side of the first hopper (101), covering the discharge hole. (101e) has a first conduit (101f) attached to its end. The first conduit (101f) is located above the spreader (104b) of the plow (104). When the turntable (101b) rotates, the grass seeds that have entered the seed trough move with it. When the seed trough containing grass seeds rotates to the notch of the ring edge (101a), the grass seeds are thrown out and introduced into the first conduit (101f) through the receiving box (101e). The grass seeds are discharged through the first conduit (101f) and fall into the planting trough.

5. The large-scale grass seeding device based on grassland ecological restoration according to claim 4, characterized in that: A bevel gear set (101c) is provided outside the turntable (101b) and inside the receiving box (101e). The bevel gear set (101c) is composed of a first bevel gear and a second bevel gear. The first bevel gear passes through the first hopper (101) and is connected to the center of the turntable (101b). The second bevel gears provided outside the multiple first hoppers (101) are connected to the first connecting shaft (101d).

6. The large-scale grass seeding device based on grassland ecological restoration according to claim 5, characterized in that: The second hopper (102) is provided with a second connecting shaft (102b), which connects multiple second hoppers (102) in series. A rotating wheel (102a) is fixedly sleeved on the second connecting shaft (102b). The rotating wheel (102a) has a circumferentially shaped material groove, and there are symmetrical limiting plates (102c) inside the rotating wheel (102a). The limiting plates (102c) clamp the two sides of the rotating wheel (102a). A receiving cylinder (102d) is installed outside the second hopper (102). It is connected to the inside of the second hopper (102), and the connection is located between the limiting plates (102c). The end of the receiving cylinder (102d) is fixedly sleeved with a second conduit (102e). The second conduit (102e) is also located above the spreading part (104b) of the plow (104). When the rotating wheel (102a) rotates, the humus that enters the trough moves accordingly. As the rotating wheel (102a) rotates, the humus is thrown into the receiving cylinder (102d) and discharged through the first conduit (101f) into the planting trough and covers the grass seeds.

7. The large-scale grass seeding device based on grassland ecological restoration according to claim 6, characterized in that: Both the first connecting shaft (101d) and the second connecting shaft (102b) are connected to the seeding rack (100) via bearings. One end of the first connecting shaft (101d) is fitted with a first sprocket (101g), and one end of the second connecting shaft (102b) is fitted with a second sprocket (102f). The first sprocket (101g) and the second sprocket (102f) mesh together with a second chain (109a). The second chain (109a) has... A driven sprocket (107d) is also engaged, and a drive shaft (107a) passes through the driven sprocket (107d). The drive shaft (107a) is also fixed to the seeding rack (100) by a bearing. A drive sprocket (107b) is fixedly sleeved on the drive shaft (107a), and a first chain (107c) is engaged on the drive sprocket (107b). The other end of the first chain (107c) is connected to a drive wheel (107), and the drive wheel ( 107) is equipped with a bracket mounted on the seeding frame (100). The seeding frame (100) is also equipped with a traction frame (108). The seeding frame (100) is connected to the agricultural machinery through the traction frame (108). When the agricultural machinery drives the sowing device to move, the drive wheel (107) rolls with the ground and drives the drive sprocket (107b) to rotate through the first chain (107c). The drive sprocket (107b) rotates synchronously through the drive shaft (107a). The driven bevel gear (107d) is rotated, and then the power is transmitted to the first sprocket (101g) and the second sprocket (102f) through the second chain (109a), which finally drives the first coupling shaft (101d) and the second coupling shaft (102b) to rotate; the seeding rack (100) is provided with a tension sprocket (109), which is arranged outside the second chain (109a) and meshes with the second chain (109a).

8. The large-scale grass seeding device based on grassland ecological restoration according to claim 1, characterized in that: The seeding rack (100) is symmetrically provided with a fixed frame (106a), and the end of the fixed frame (106a) is rotatably connected with an auxiliary wheel (106). A third hopper (103) is provided above the seeding rack (100), and a through hole is provided at the bottom of the third hopper (103), which is directly opposite to the second hopper (102).

9. A method for large-scale grass seeding based on grassland ecological restoration, comprising using the large-scale grass seeding device for grassland ecological restoration as described in claim 1, characterized in that, The steps are as follows: Step 1: The agricultural machinery pulls the seeding frame (100) forward via the traction frame (108). The drive wheel (107) rolls with the ground and is driven by the first chain (107c), drive sprocket (107b), drive shaft (107a), second chain (109a), first sprocket (101g) and second sprocket (102f), which drive the first connecting shaft (101d) and the second connecting shaft (102b) to rotate synchronously. Step 2: The triangular cutting part (104a) of the plow blade (104) cuts into the soil to form a linear planting trough. The butterfly-shaped spreading part (104b) slightly expands the sides of the planting trough. The grassland crust layer and litter layer are preserved during the operation. Step 3: The turntable (101b) inside the first hopper (101) rotates to discharge grass seeds in a measured amount, and the wheel (102a) inside the second hopper (102) rotates to discharge humus in a measured amount. The grass seeds and humus fall into the linear planting trough in sequence. Step 4: The pressing roller (105) moves with the seeding frame (100) to press down the seeding trough after sowing, so that the expanded seeding trough is reset and closed, thus completing the low-disturbance grass seed sowing.

10. The method for large-scale grass seeding based on grassland ecological restoration according to claim 9, characterized in that: During the operation, the tension sprocket (109) continuously tensions the second chain (109a) to stabilize power transmission, the staggered plow blades (104) continuously and linearly groove, the buffer part (104c) reduces the impact of operation, and the auxiliary wheel (106) cooperates with the drive wheel (107) to keep the device moving smoothly.

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