An ecological grassland vegetation repair reseeding machine

Abstract

The present application belongs to the technical field of agricultural machinery, and discloses an ecological grassland vegetation repair and reseeding machine, which comprises a rack serving as an overall frame of the reseeding machine, a storage box connected to the top of the rack and used for placing seeds and feed, support wheels connected to the two sides of the rack and used for supporting the rack and assisting the rack in moving along the ground, a ring-shaped air jet structure used for horizontally jetting air along the inner wall of a pipeline and forming a uniform "horizontal air cushion layer" between the pipeline wall and the falling path of the seeds, which can increase the falling resistance of the seeds and reduce the falling speed of the seeds, and a ring-shaped spiral flow air jet structure used for spirally downwardly jetting air along the inner wall of the pipeline and forming a "rotary air curtain" wrapping the seeds, which utilizes the centrifugal force of the air flow to constrain the seeds near the central axis of the pipeline, reduces the lateral swing amplitude, reduces the probability of physical contact between the seeds and the pipeline wall, effectively avoids the problems of seed coat breakage, endosperm loss and the like, and thus significantly protects the seed activity.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, and in particular relates to an ecological grassland vegetation restoration and reseeding machine. Background Technology

[0002] In the vast grassland ecosystem, vegetation, as a core link in the food chain, plays a crucial role in preventing wind erosion and sand fixation, conserving water and soil, and maintaining biodiversity. However, affected by natural and human factors such as overgrazing, climate change, and rodent and insect infestations, the area of ​​degraded grasslands worldwide is expanding year by year, with declining vegetation cover and increased soil exposure. This not only disrupts the ecological balance of grasslands but also threatens regional ecological security and the sustainable development of animal husbandry. Against this backdrop, vegetation restoration and reseeding technology, as an important means of rapidly restoring grassland vegetation, directly determines the success or failure of grassland ecological restoration in terms of efficiency and quality.

[0003] Traditional grassland reseeders face dual technical bottlenecks in actual operation: seed delivery and sowing quality. The seed delivery pipes of reseeders are mostly rigid structures. After the seeds enter the pipe from the seed storage box, they fall rapidly under the action of gravity. During this process, they are prone to frequent collisions and friction with the inner wall of the pipe. For the forage seeds commonly used in grassland restoration (such as sheepgrass and icegrass), their seed coats are thin and their embryos are fragile. Collisions can not only cause seed coat damage and endosperm loss, but also directly damage seed activity, significantly reducing germination rate and survival rate. At the same time, the excessively fast seed falling speed can also affect the uniformity and accuracy of sowing. Summary of the Invention

[0004] This invention addresses the problem in existing technologies where seeds, after entering the pipeline from the seed storage box, fall rapidly under gravity, frequently colliding and rubbing against the inner wall of the pipeline. For commonly used forage grass seeds in grassland restoration (such as sheepgrass and icegrass), whose seed coats are thin and embryos are fragile, collisions not only damage the seed coat and endosperm but also directly impair seed viability, significantly reducing germination and survival rates. Furthermore, the excessively rapid seed descent also affects the uniformity and accuracy of sowing. The invention proposes the following technical solution:

[0005] An ecological grassland vegetation restoration and reseeding machine includes:

[0006] The frame serves as the overall framework for the reseeding machine;

[0007] A storage box, connected above the frame, is used to hold seeds and feed;

[0008] Support wheels are connected to both sides of the frame to support the frame and assist it in moving along the ground;

[0009] A lifting frame, connected to the frame;

[0010] The positioning frame is connected to the machine frame via the lifting frame;

[0011] mounting shaft, connected to the positioning frame;

[0012] cutting wheel, connected to the positioning frame through the mounting shaft and rotating synchronously with the mounting shaft;

[0013] pipe, connected below the storage box, for seed falling delivery;

[0014] the seed protection assembly comprises: variable speed structure, connected to the mounting shaft; fan, connected to the variable speed structure; flow distribution structure, provided at the air outlet end of the fan and connected to the outside of the variable speed structure; connecting pipe, one end of which is connected to the flow distribution structure; annular air jet structure, connected to the other end of the connecting pipe and horizontally jetting air along the inner wall of the pipe; annular spiral air jet structure, connected to the flow distribution structure and spirally downward jetting air along the inner wall of the pipe;

[0015] when the cutting wheel rotates, the variable speed structure is driven by the mounting shaft to rotate the fan, and the air generated by the fan is respectively introduced into the annular air jet structure and the annular spiral air jet structure through the connecting pipe and the flow distribution structure.

[0016] As a preferred embodiment of the above technical solution, the variable speed structure comprises:

[0017] driving wheel, connected to the mounting shaft and rotating synchronously with the mounting shaft;

[0018] driven wheel, connected to the positioning frame;

[0019] protective cover, connected to the positioning frame and located outside the driving wheel and the driven wheel, for protecting the driving wheel and the driven wheel.

[0020] As a preferred embodiment of the above technical solution, the flow distribution structure comprises:

[0021] air inlet cover, connected to the protective cover;

[0022] filter screen, detachably connected to the air inlet of the air inlet cover, for filtering the air entering the air inlet cover;

[0023] venturi tube, connected to one end of the air inlet cover and accelerating the air through a converging section;

[0024] flow guide pipe, two ends of which are respectively connected to the venturi tube and the annular spiral air jet structure, for conveying the accelerated air;

[0025] flow distribution pipe, two ends of which are respectively connected to the air inlet cover and the annular air jet structure, and the outer diameter of the flow distribution pipe is smaller than the inner diameter of the flow guide pipe.

[0026] As a preferred embodiment of the above technical solution, the annular air jet structure comprises:

[0027] annular pipe connected to the connecting pipe and located inside the pipeline;

[0028] hose connected to the annular pipe;

[0029] air jet head movably connected between the hose and the annular pipe and rotated at multiple angles through the hose;

[0030] support arm movably connected to the air jet head;

[0031] lifting ring movably connected between the support arm and the air jet head, used to support and adjust the angle of the air jet head and lift along the axial direction of the pipeline;

[0032] rubber pad provided on the inner wall of the annular pipe;

[0033] clamping groove provided on the outer side of the lifting ring and used to clamp the rubber pad.

[0034] As a preferred embodiment of the above technical solution, the annular rotational flow air jet structure comprises:

[0035] positioning ring fixedly connected to the end of the flow guide pipe away from the Venturi tube and annularly arranged inside the pipeline, used to carry the rotational flow assembly;

[0036] spoiler ring coaxially movably connected to the inner side wall of the positioning ring, used to convert linear airflow into rotational airflow;

[0037] air jet groove circumferentially provided at the bottom end of the positioning ring;

[0038] rubber ring provided above the positioning ring;

[0039] exhaust cover provided above the rubber ring;

[0040] exhaust pipe provided inside the exhaust cover and penetrating through the pipeline, used to directionally discharge the gas rising in the annular air jet structure during operation out of the pipeline.

[0041] As a preferred embodiment of the above technical solution, the driving wheel and the driven wheel are connected through meshing transmission; the diameter of the driving wheel is larger than that of the driven wheel, the rotational speed of the driven wheel is adjusted through the diameter difference, and the driven wheel is coaxially fixedly connected with the fan blade and rotates synchronously with the driven wheel.

[0042] As a preferred embodiment of the above technical solution, the lifting frame is composed of a rectangular frame and a spring rod, wherein the rectangular frame is sleeved outside the rack, and the spring rod is connected to the positioning frame and the rectangular frame at both ends.

[0043] As the preferred technical scheme of the above, the flow guide pipe and the connecting pipe are flexible plastic pipes, the pipeline is a plastic pipe, the air inlet cover is welded with a stand at one end, and the air inlet cover and the protective cover are connected through the stand.

[0044] As the preferred technical scheme of the above, the support wheel is combined by a roller and a tire, the roller is rotationally connected with the frame, and the tire is arranged outside the roller and provided with anti-skid lines outside the tire.

[0045] The present application has the following advantages:

[0046] (1) The double air film protection is formed on the inner wall of the pipeline, the annular air jet structure sprays air horizontally along the inner wall of the pipeline to form a uniform "horizontal air cushion layer" between the pipeline wall and the seed falling path, which can increase the seed falling resistance and reduce the seed falling speed; the annular spiral flow air jet structure sprays air spirally downward along the inner wall of the pipeline to form a "rotary air curtain" wrapping the seeds, which uses the centrifugal force of the air flow to constrain the seeds near the central axis of the pipeline, reduces the lateral swing amplitude, reduces the probability of physical contact between the seeds and the pipeline wall, effectively avoids the problems of seed coat breakage and endosperm loss, and significantly protects the seed activity.

[0047] (2) The device has the function of adjusting the falling resistance according to the size of the seeds, which can adapt to the seed planting requirements of different types without replacing the core components, does not need to configure separate equipment for different seeds, reduces the equipment investment cost, improves the universality and practicality of the equipment, and expands the application range of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 A structural schematic diagram of an ecological grassland vegetation repair reseeding machine in Example 1 is shown.

[0049] Figure 2 A front view of an ecological grassland vegetation repair reseeding machine in Example 1 is shown.

[0050] Figure 3 A mounting structure schematic diagram of a positioning frame in Example 1 is shown.

[0051] Figure 4 A mounting structure schematic diagram of a driving wheel in Example 1 is shown.

[0052] Figure 5 A mounting structure schematic diagram of a driven wheel in Example 1 is shown.

[0053] Figure 6 A structural schematic diagram of a region A in Example 1 is shown. Figure 5 A structural schematic diagram of a region A in Example 1 is shown.

[0054] Figure 7 A structural schematic diagram of a region A in Example 1 is shown. Figure 5A structural schematic diagram of the middle B region;

[0055] Figure 8 A structural schematic diagram of the shunt structure in Example 1 is shown.

[0056] Figure 9 A structural schematic diagram of the middle B region is shown. Figure 8 A structural schematic diagram of the middle C region is shown.

[0057] Figure 10 A physical diagram of an ecological grassland vegetation repair reseeding machine in Example 1 is shown.

[0058] In the figure: 1, frame; 2, storage box; 3, support wheel; 4, lifting frame; 5, positioning frame; 6, mounting shaft; 7, cutting wheel; 8, pipe; 91, driving wheel; 92, driven wheel; 93, protective cover; 10, fan blade; 111, air inlet cover; 112, filter screen; 113, Venturi tube; 114, flow guide pipe; 115, shunt pipe; 12, connecting pipe; 131, annular pipe; 132, hose; 133, air jet head; 134, support arm; 135, lifting ring; 136, rubber pad; 137, clamping groove; 141, positioning ring; 142, spoiler ring; 143, air jet groove; 144, rubber ring; 145, exhaust cover; 146, exhaust pipe. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with embodiments.

[0060] Example 1

[0061] The present application provides an ecological grassland vegetation repair reseeding machine, such as Figures 1 to 10As shown, it comprises: a rack 1, a storage box 2, a support wheel 3, a lifting frame 4, a positioning frame 5, a mounting shaft 6, a cutting wheel 7, a pipeline 8 and a seed protection assembly; the rack 1 serves as the overall frame of the reseeding machine; the storage box 2 is connected above the rack 1 and used for placing seeds and feed; the support wheel 3 is connected to both sides of the rack 1 to support the rack 1 and assist it in moving along the ground; the lifting frame 4 is connected to the rack 1; the positioning frame 5 is connected to the rack 1 through the lifting frame 4; the mounting shaft 6 is connected to the positioning frame 5; the cutting wheel 7 is connected to the positioning frame 5 through the mounting shaft 6 and rotates synchronously with the mounting shaft 6; the pipeline 8 is connected below the storage box 2 and used for seed falling and conveying; the seed protection assembly comprises: a variable speed structure, a fan blade 10, a flow dividing structure, a connecting pipe 12, a ring-shaped air jet structure and a ring-shaped rotational flow air jet structure; the variable speed structure is connected to the mounting shaft 6; the fan blade 10 is connected to the variable speed structure; the flow dividing structure is arranged at the air outlet end of the fan blade 10 and connected to the outside of the variable speed structure; one end of the connecting pipe 12 is connected to the flow dividing structure; the ring-shaped air jet structure is connected to the other end of the connecting pipe 12 and sprays air horizontally along the inner wall of the pipeline 8; the ring-shaped rotational flow air jet structure is connected to the flow dividing structure and sprays air spirally downward along the inner wall of the pipeline 8; when the cutting wheel 7 rotates, the variable speed structure is driven by the mounting shaft 6 to rotate the fan blade 10, and the gas generated by the fan blade 10 is introduced into the ring-shaped air jet structure and the ring-shaped rotational flow air jet structure through the connecting pipe 12 and the flow dividing structure respectively.

[0062] Since the seeds fall rapidly under the action of gravity after entering the pipeline 8 from the storage box 2, they are prone to frequent collision and friction with the inner wall of the pipeline 8 during the process. For the grassland restoration commonly used pasture seeds (such as Leymus chinensis and Agropyron cristatum), the seed coat is thin and the embryo is fragile. Collision will not only cause the seed coat to break and the endosperm to be lost, but also directly damage the seed activity, greatly reducing the germination rate and survival rate. At the same time, the too fast falling speed of the seeds will also affect the uniformity and accuracy of seeding.

[0063] Therefore, the seed protection assembly is arranged. The seed protection assembly forms double air film protection on the inner wall of the pipeline 8 through the synergistic effect of the ring-shaped air jet structure and the ring-shaped rotational flow air jet structure. The ring-shaped air jet structure sprays air horizontally along the inner wall of the pipeline 8, forming a uniform "horizontal air cushion layer" between the pipeline wall and the seed falling path, which can increase the descending resistance of the seeds and reduce the falling speed of the seeds. The ring-shaped rotational flow air jet structure sprays air spirally downward along the inner wall of the pipeline 8, forming a "rotational air curtain" wrapping the seeds, which uses the centrifugal force of the airflow to constrain the seeds near the central axis of the pipeline 8, reducing the lateral swing amplitude, thereby effectively avoiding the problems of seed coat breakage and endosperm loss, and thus significantly protecting the seed activity.

[0064] In use, the frame 1 is connected to the vehicle (tractor), and the seeds are placed inside the storage box 2. As the vehicle (tractor) moves, the friction with the ground causes the support wheel 3 to rotate, and the cutting wheel 7 rotates due to friction inside the ground (the cutting wheel 7 rotates inside the positioning frame 5 via the mounting shaft 6). The cutting wheel 7 also creates a trench in the ground. At this time, the material inside the storage box 2 falls into the trench along the inside of the pipe 8. Meanwhile, when the mounting shaft 6 rotates, it drives the fan blade 10 to rotate through the speed-changing structure. When the fan blade 10 rotates, it drives the gas to flow along the inside of the diversion structure. At this time, the gas enters the annular jet structure and the annular vortex jet structure through the connecting pipe 12 and the diversion structure, respectively. This causes the annular jet structure to form a horizontal jet at the discharge end of the pipe 8, which reduces the falling speed of the seeds. The annular vortex jet structure also spirals downward along the inner wall of the pipe 8, forming a "rotating air curtain" that envelops the seeds and prevents the seeds from colliding with the inner wall of the pipe 8.

[0065] Specifically, two storage boxes 2 are fixedly installed and connected to the top of the frame 1. (The storage box 2 has two chambers inside, one for seeds and one for feed; this is existing technology and will not be elaborated further here.) End caps are snapped onto the top of the two storage boxes 2, and electric valves are symmetrically installed at equal intervals at the bottom of the storage boxes 2. (The opening degree is adjusted by linking the vehicle's speed to a PLC control system, achieving precise control of the seeding rate; this is existing technology.) Figure 2 As shown (not elaborated here), a pipe 8 is installed at the bottom of the electric valve. Support wheels 3 are symmetrically rotatably connected to the outside of the frame 1. The support wheels 3 are composed of rollers and tires. The rollers and the frame 1 are rotatably connected. The tires are located on the outside of the rollers and have anti-slip patterns on the outside of the tires (to increase friction with the ground and improve driving stability; the above is existing technology and will not be elaborated here). A lifting frame 4 is sleeved on the outside of the frame 1. The lifting frame 4 is composed of a rectangular frame and a spring rod. The rectangular frame is sleeved on the outside of the frame 1. The two ends of the spring rod are respectively connected to the positioning frame 5 and the rectangular frame. The bottom of the inner wall of the rectangular frame is connected to a bolt by a thread. The bolts compress and fix the rectangular frame. The positioning frame 5 is rotatably connected to a mounting shaft 6 through a bushing. A cutting wheel 7 is fixedly installed at one end of the mounting shaft 6. Figure 1 As shown), a speed-changing structure is welded to one end of the positioning frame 5, and a fan blade 10 is fixedly installed at one end of the speed-changing structure. A flow-dividing structure is installed at the outer position of the fan blade 10 at one end of the speed-changing structure. A connecting pipe 12 is installed inside the flow-dividing structure. An annular jet structure is installed at one end of the connecting pipe 12 and the annular jet structure is located at the bottom of the inner wall of the pipe 8. An annular swirling jet structure is connected to one end of the flow-dividing structure and the annular swirling jet structure is located at the top of the inner wall of the pipe 8.

[0066] like Figure 4 and Figure 5As shown, since the rotation speed of the fan blade 10 is adjusted by the variable speed structure, at this time, the variable speed structure needs to use variable difference to make the fan blade 10 rotate quickly, for this, the variable speed structure includes: a driving wheel 91, a driven wheel 92 and a protective cover 93, the driving wheel 91 is connected to the mounting shaft 6 and rotates synchronously with the mounting shaft 6; the driven wheel 92 is connected to the positioning frame 5; the protective cover 93 is connected to the positioning frame 5 and located outside the driving wheel 91 and the driven wheel 92, which is used to protect the driving wheel 91 and the driven wheel 92.

[0067] Since the driving wheel 91 rotates when the mounting shaft 6 rotates, the driving wheel 91 drives the driven wheel 92 to rotate quickly, and the driven wheel 92 drives the fan blade 10 to rotate, and at the same time, the protective cover 93 prevents dust from the outside from entering the outside of the driving wheel 91 and the driven wheel 92.

[0068] Specifically, one end of the mounting shaft 6 is located outside the positioning frame 5 and is provided with the driving wheel 91 through a key, the outside of the driving wheel 91 is provided with the driven wheel 92 through meshing connection, the driven wheel 92 and the positioning frame 5 are rotatably connected through a bearing, the positioning frame 5 is provided with the protective cover 93 through thread connection outside the driven wheel 92 and the outer surface of the driven wheel 92, one end of the driven wheel 92 is provided with the fan blade 10 through a round rod, the round rod penetrates the protective cover 93, the driving wheel 91 and the driven wheel 92 are connected through meshing transmission, the diameter of the driving wheel 91 is greater than the diameter of the driven wheel 92 (the diameter of the driving wheel 91 is twice the diameter of the driven wheel 92), the rotation speed of the driven wheel 92 is adjusted through the diameter difference, and the driven wheel 92 is coaxially and fixedly connected with the fan blade 10 and rotates synchronously with the driven wheel 92.

[0069] As shown in Figure 8 and Figure 9 Since the gas needs to be split by the split structure, but the gas needs to be filtered and accelerated during the splitting process to prevent dust in the gas from entering the outside of the seed, for this, the split structure includes: an air inlet cover 111, a filter screen 112, a Venturi tube 113, a flow guide pipe 114 and a split pipe 115; the air inlet cover 111 is connected to the protective cover 93; the filter screen 112 is detachably connected to the air inlet of the air inlet cover 111 to filter the gas entering the air inlet cover 111; the Venturi tube 113 is connected to one end of the air inlet cover 111 and accelerates the gas through the contraction section; the flow guide pipe 114 is connected to the Venturi tube 113 and the annular rotational flow jet structure at both ends, which is used to transport the accelerated gas; the split pipe 115 is connected to the air inlet cover 111 and the annular jet structure at both ends, and the outer diameter of the split pipe 115 is smaller than the inner diameter of the flow guide pipe 114.

[0070] When the fan blade 10 rotates, the gas is brought to flow, so that the gas enters the inside of the air inlet cover 111, and is filtered along the filter screen 112 inside the air inlet cover 111, and the filtered gas enters the inside of the venturi tube 113, is accelerated through the throat end of the venturi tube 113, and finally the accelerated gas enters the inside of the flow guide pipe 114, and at this time part of the accelerated gas flows along the inside of the shunt pipe 115.

[0071] Specifically, the air inlet cover 111 is fixedly installed at one end of the fan blade 10 outside the protective cover 93, one end of the air inlet cover 111 is welded with a stand column, the air inlet cover 111 and the protective cover 93 are connected through the stand column, the stand column and the protective cover 93 are connected through the pin shaft clamping connection, the air inlet cover 111 is composed of a conical cover and an elbow pipe, a filter screen 112 is installed in the elbow pipe through a screw, one end of the elbow pipe of the air inlet cover 111 is connected with a venturi tube 113 through a thread, one end of the venturi tube 113 is connected with a flow guide pipe 114 through a thread, the flow guide pipe 114 is clamped and installed with a shunt pipe 115 inside, the shunt pipe 115 is fixedly connected with the connecting pipe 12, the flow guide pipe 114 and the connecting pipe 12 are flexible plastic pipes, and the pipeline 8 is a plastic pipe.

[0072] As shown in Figure 4 , Figure 5 and Figure 7 , the annular jet structure forms a horizontal air curtain at the bottom end of the inner wall of the pipeline 8, but since the sizes of the planted seeds are inconsistent, the inclination angle of the horizontal air curtain needs to be changed, so that the gas blows upward, thereby increasing the upward thrust on the seeds and reducing the descending speed of the seeds. Therefore, the annular jet structure comprises an annular pipe 131, a hose 132, a jet head 133, a support arm 134, a lifting ring 135, and a rubber pad 136. The annular pipe 131 is connected to the connecting pipe 12 and located inside the pipeline 8; the hose 132 is connected to the annular pipe 131; the jet head 133 is movably connected between the annular pipe 131 and the hose 132 and rotates at multiple angles through the hose 132; the support arm 134 is movably connected to the jet head 133; the lifting ring 135 is movably connected between the support arm 134 and the jet head 133, used to support and adjust the angle of the jet head 133 and axially lift along the pipeline 8; the rubber pad 136 is arranged on the inner wall of the annular pipe 131; a clamping groove 137 is arranged on the outer side of the lifting ring 135, used to clamp the rubber pad 136.

[0073] When in use, the clamping grooves 137 of the lifting ring 135 are clamped with different rubber pads 136 to form fixation when the lifting ring 135 is lifted or lowered, and because the lifting ring 135 lifts or lowers to drive the support arm 134 to move correspondingly, the support arm 134 is rotatably connected with the jet head 133, and the support arm 134 is provided with a sliding groove at the position of the jet head 133, when the support arm 134 moves with the lifting ring 135, the relative sliding in the sliding groove is generated, and the jet head 133 is pushed or pulled to rotate around the rotation connection point of the support arm 134, through the above linkage, the up-down movement of the lifting ring 135 can be converted into the angle adjustment of the jet head 133.

[0074] Specifically, one end of the connecting pipe 12 is fixedly connected with the annular pipe 131, the connecting pipe 12 penetrates the pipeline 8, three rubber pads 136 are equidistantly clamped and installed on the inner wall bottom end of the connecting pipe 12, the lifting ring 135 is slidingly connected with the inner wall bottom end of the annular pipe 131, two clamping grooves 137 are formed on the outer side of the lifting ring 135, the distance between the two clamping grooves 137 is equal to the distance between the two rubber pads 136, the support arm 134 is rotatably connected with the lifting ring 135 through a rotating shaft at the top end of the lifting ring 135, the jet head 133 is rotatably connected with the support arm 134 through a rotating shaft at the top end of the support arm 134, a corresponding sliding groove is formed on the support arm 134 at the position outside the rotating shaft at the top end of the support arm 134, the jet head 133 is rotatably connected between the annular pipe 131 through rotating shafts on both sides, one end of the jet head 133 close to the annular pipe 131 is connected with the hose 132, one end of the hose 132 is located inside the annular pipe 131

[0075] As shown in Figure 4 , Figure 5 and Figure 6 , because the rotating air curtain is generated by using the annular rotating flow jet structure, the seed needs to be guided and buffered when entering the rotating air curtain to prevent a large impact force between the seed and the structure, and because the air inlet is generated inside the pipeline 8, an exhaust structure needs to be arranged inside the pipeline 8 at this time to discharge the gas, for this purpose, the annular rotating flow jet structure comprises a positioning ring 141, a spoiler ring 142, a jet groove 143, a rubber ring 144, an exhaust cover 145 and an exhaust pipe 146; the positioning ring 141 is fixedly connected to one end of the flow guide pipe 114 away from the Venturi tube 113 and is annularly arranged inside the pipeline 8 to bear the rotating flow assembly; the spoiler ring 142 is coaxially movably connected to the inner side wall of the positioning ring 141 to convert the linear airflow into the rotating airflow; the jet groove 143 is formed along the bottom end of the positioning ring 141; the rubber ring 144 is arranged above the positioning ring 141; the exhaust cover 145 is arranged above the rubber ring 144; the exhaust pipe 146 is arranged inside the exhaust cover 145 and penetrates the pipeline 8 to directionally discharge the gas rising in the annular jet structure during operation out of the pipeline 8.

[0076] When in use, the gas enters into the inside of the positioning ring 141, and blows the spoiler ring 142 to rotate, the spoiler ring 142 rotates to drive the gas to rotate, the rotating gas forms a rotating downward flow gas in the pipe 8 along the air jet groove 143, and the rubber ring 144 installed above the positioning ring 141 reduces the impact force of the seeds on the positioning ring 141, and makes the seeds enter into the middle part of the positioning ring 141, and the increased gas in the pipe 8 is discharged from the pipe 8 along the exhaust pipe 146 in the inside of the exhaust cover 145.

[0077] Specifically, one end of the flow guide pipe 114 is fixedly connected with the positioning ring 141, two elbow pipes are symmetrically installed outside the positioning ring 141, the elbow pipes penetrate through the pipe 8 and are clampedly installed in the inside of the flow guide pipe 114, the inner wall of the positioning ring 141 is rotationally connected with the spoiler ring 142 Figure 6 ), the bottom end of the inner wall of the positioning ring 141 close to the inner wall of the pipe 8 is provided with the air jet groove 143, the angle between the air jet groove 143 and the inner wall of the pipe 8 is thirty degrees, the top end of the positioning ring 141 is bonded with the rubber ring 144, the top end of the rubber ring 144 is bonded with the exhaust cover 145, the exhaust cover 145 is integrally formed with the exhaust pipe 146 in the inside and the exhaust pipe 146 penetrates through the pipe 8.

[0078] Working principle: during actual use, the frame 1 is fixedly connected with a traction vehicle (tractor) through a traction pin, the contact state of the supporting wheel 3 with the ground is checked, the height of the positioning frame 5 is adjusted through the rectangular frame bolt of the lifting frame 4, the clearance between the cutting wheel 7 and the ground meets the requirement of the seeding depth, the lifting height is calibrated through the scale ruler, then the end cover of the storage box 2 is opened, the pasture seeds (such as sheep grass and ice grass) are loaded into the seed bin in the inside of the storage box 2, the feed is loaded into the independent feed bin in the inside of the storage box 2, the end cover is closed, then the opening parameter of the electric valve 22 is set through the PLC control system, the seeding amount is preset according to the seed particle size and the target plant spacing;

[0079] And the angle of the horizontal air curtain is adjusted according to the size of the seed, at this time the lifting ring 135 rises, the clamping groove 137 of the lifting ring 135 is clamped with different rubber pads 136 to form clamping fixation, and because the lifting ring 135 rises to drive the supporting arm 134 to move correspondingly, the supporting arm 134 is rotationally connected with the air jet head 133, and the supporting arm 134 is provided with a sliding groove at the position of the air jet head 133, when the supporting arm 134 moves with the lifting ring 135, relative sliding is generated in the sliding groove, and the air jet head 133 is pushed or pulled to rotate around the rotation connection point with the supporting arm 134, through the above linkage relationship, the up-down movement of the lifting ring 135 can be converted into the angle adjustment of the air jet head 133;

[0080] Then, the towing vehicle starts and runs at a constant speed, the supporting wheel 3 rotates synchronously with the friction of the ground to ensure the device to run smoothly, at the same time, the cutting wheel 7 contacts with the ground to generate friction resistance, rotates in the positioning frame 5 around the mounting shaft 6 to perform ditching operation on the ground and form a seed sowing ditch with uniform depth, at this time, the mounting shaft 6 rotates with the cutting wheel 7, synchronously rotates with the driving wheel 91 connected by the key, the driving wheel 91 drives the driven wheel 92 to rotate at a higher speed through the meshing, the driven wheel 92 rotates at twice speed of the driving wheel 91 because the diameter ratio of the driving wheel 91 and the driven wheel 92 is 2:1, the driven wheel 92 drives the fan blade 10 to rotate at a high speed through the round rod, the airflow generated by the fan blade 10 enters the air inlet cover 111, the main airflow enters the venturi tube 113 after filtering the dust through the filter screen 112, and then is transported to the annular cyclone jet structure through the flow guide pipe 114 after accelerating in the contraction section(the airflow speed is increased to 1.5-2 times of the initial speed); the branch airflow is transported to the annular jet structure through the connecting pipe 12 by the branch flow pipe 115, and the pipe diameter difference between the branch flow pipe 115 and the flow guide pipe 114(the outer diameter of the branch flow pipe 115 is smaller than the inner diameter of the flow guide pipe 114) realizes the flow distribution of the main and branch airflows.

[0081] After the annular jet structure receives the branch airflow, the branch airflow is distributed to each jet head 133 through the annular pipe 131, the jet head 133 is adjusted to a horizontal angle through the hose 132, and a "horizontal air cushion layer" with a thickness of 0.5-1mm is formed along the inner wall of the pipeline 8, which can increase the descending resistance of the seeds and reduce the descending speed of the seeds, after the annular cyclone jet structure receives the main airflow, the airflow impacts the spoiler ring 142 to drive the spoiler ring 142 to rotate, so that the airflow is converted into a spiral shape, and a "rotary air curtain" is formed through the jet groove 143(30° angle with the pipe wall) to constrain the seeds near the central axis of the pipeline 8, the seeds in the seed storage box 2 enter the pipeline 8 through the electric valve 22 under the action of gravity, and during the falling process: the rotary air curtain reduces the lateral swing of the seeds through the centrifugal force to reduce the collision probability, the horizontal air cushion layer increases the resistance to reduce the descending speed of the seeds, and at the same time, the excess gas in the pipeline 8 is discharged through the exhaust pipe 146 of the exhaust cover 145 to maintain the stable environment inside the pipeline 8.

[0082] The above examples are only used to illustrate the technical solutions of the present application, but not limit it.

Claims

1. An ecological prairie vegetation restoration overseeding machine characterized by, The utility model relates to a kind of seed sowing machine, including: Rack (1), as the overall framework of the interplanting machine; Storage box (2), connected above the rack (1), for placing seeds and feed; Support wheel (3), connected to the both sides of the rack (1), support rack (1) and assist it to move along the ground; Lifting frame (4), connected to the rack (1); Positioning frame (5), connected to the rack (1) by the lifting frame (4); Mounting shaft (6), connected to the positioning frame (5); Cutting wheel (7), connected to the positioning frame (5) by the mounting shaft (6), rotate synchronously with mounting shaft (6); Pipeline (8), connected below the storage box (2), for seed drop delivery; Seed protection assembly includes: Variable speed structure, connected to the mounting shaft (6); Variable speed structure includes: Driving wheel (91), connected to the mounting shaft (6), rotate synchronously with mounting shaft (6); Driven wheel (92), connected to the positioning frame (5); Protective cover (93), connected to the positioning frame (5) and located outside the driving wheel (91) and driven wheel (92), for protecting driving wheel (91) and driven wheel (92); Fan blade (10), connected to the variable speed structure; Flow dividing structure, provided at the air outlet end of the fan blade (10) and connected to the outside of the variable speed structure;Connecting pipe (12), one end connected to the flow dividing structure; Flow dividing structure includes: Air inlet cover (111), connected to the protective cover (93); Venturi tube (113), connected to one end of the air inlet cover (111), accelerate gas through contraction section; Flow guide pipe (114), both ends are connected to the venturi tube (113) and annular rotational flow jet structure respectively, for conveying accelerated gas; Flow dividing pipe (115), both ends are connected to the air inlet cover (111) and the annular jet structure respectively, the outer diameter of the flow dividing pipe (115) is smaller than the inner diameter of the flow guide pipe (114); Annular jet structure, connected to the other end of the connecting pipe (12), and horizontally jet along the inner wall of the pipeline (8); Annular jet structure includes: Annular pipe (131), connected to the connecting pipe (12) and located inside the pipeline (8); Hose (132), connected to the annular pipe (131); Jet head (133), connected by hose (132) multi-angle activity; Annular rotational flow jet structure, connected to the flow dividing structure, and spiral downward jet along the inner wall of the pipeline (8); Annular rotational flow jet structure includes: Positioning ring (141), fixedly connected to one end of the flow guide pipe (114) away from the venturi tube (113), and annularly arranged inside the pipeline (8), for bearing rotational flow assembly; Turbulence ring (142), coaxially movably connected to the inner side wall of the positioning ring (141), for converting linear airflow into rotational airflow; When the cutting wheel (7) rotates, the variable speed structure is driven by the mounting shaft (6) to rotate the fan blade (10), and the gas generated by the fan blade (10) is introduced into the annular jet structure and the annular rotational flow jet structure respectively through the connecting pipe (12) and the flow dividing structure.

2. The ecological prairie vegetation remediation overseeding machine of claim 1, wherein, The flow dividing structure further includes: A filter screen (112) is detachably connected to the air inlet of the air inlet cover (111) to filter the air entering the air inlet cover (111).

3. The ecological prairie vegetation remediation overseeding machine of claim 1, wherein, The annular jet structure further comprises: A support arm (134) movably connected to the jet head (133); A lifting ring (135) movably connected between the support arm (134) and the jet head (133) to support and adjust the angle of the jet head (133) and to lift along the axis of the pipeline (8); A rubber pad (136) arranged on the inner wall of the annular pipe (131); A clamping groove (137) arranged on the outer side of the lifting ring (135) to clamp the rubber pad (136).

4. The ecological prairie vegetation remediation overseeding machine of claim 1, wherein, The annular cyclone jet structure further comprises: A jet groove (143) circumferentially arranged at the bottom end of the positioning ring (141); A rubber ring (144) arranged above the positioning ring (141); An exhaust cover (145) arranged above the rubber ring (144); An exhaust pipe (146) arranged inside the exhaust cover (145) and penetrating the pipeline (8) to direct the rising gas in the annular jet structure to exhaust out of the pipeline (8).

5. The ecological prairie vegetation remediation overseeding machine of claim 1, wherein, The driving wheel (91) and the driven wheel (92) are connected by meshing transmission; the diameter of the driving wheel (91) is larger than that of the driven wheel (92), and the speed of the driven wheel (92) is adjusted by the diameter difference; the driven wheel (92) is coaxially fixedly connected with the fan blade (10) and rotates synchronously with the driven wheel (92).

6. The ecological prairie vegetation remediation overseeding machine of claim 1, wherein, The lifting frame (4) is composed of a rectangular frame and a spring rod, wherein the rectangular frame is sleeved on the outer side of the rack (1), and the spring rod is connected at both ends to the positioning frame (5) and the rectangular frame.

7. The ecological prairie vegetation remediation overseeding machine of claim 2, wherein, The flow guide pipe (114) and the connecting pipe (12) are flexible plastic pipes, the pipeline (8) is a plastic pipe, one end of the air inlet cover (111) is welded with a stand, and the air inlet cover (111) and the protective cover (93) are connected through the stand.

8. The ecological prairie vegetation remediation overseeding machine of claim 1, wherein, The support wheel (3) is composed of a roller and a tire, wherein the roller is rotatably connected with the rack (1), and the tire is arranged on the outer side of the roller and has anti-skid patterns on the outer side.

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