Wide wheat seeding device

Abstract

The utility model relates to a wide wheat seeding device, which is used for improving the seeding uniformity and accuracy of wheat seeds, and comprises a walking rack and a plurality of single-seed seeding assemblies arranged in an array in the width direction, and each single-seed seeding assembly comprises a seed blanking box, a negative pressure type seed suction roller, a driving motor and a seeding pipe, the negative pressure type seed suction roller is rotatably arranged at the seed outlet of the seed discharging box, the rolling surface of the negative pressure type seed suction roller is matched with the seed outlet, seed suction holes are annularly distributed in the rolling surface of the negative pressure type seed suction roller in the circumferential direction, a negative pressure space can be formed inside the negative pressure type seed suction roller relative to the outside, and the seed suction holes are all communicated with the negative pressure space; the driving motor is in transmission connection with the negative pressure type seed suction roller so as to enable the negative pressure type seed suction roller to rotate, and during the period, the seed suction holes successively adsorb single seeds; a seed shifting part is arranged at one end of the seeding pipe, the seed shifting part is located on the moving path of the seed suction holes, one side of the seed shifting part is close to the negative pressure type seed suction roller, and the seed shifting part is used for guiding wheat seeds at the seed suction holes to enter the seeding pipe and be seeded into the seeding furrows by the seeding pipe.

Description

Technical Field

[0001] This application belongs to the field of crop sowing technology, and specifically relates to a wide-row wheat sowing device. Background Technology

[0002] Currently, wheat is typically sown using a seeder in rows. The seeder creates furrows in well-plowed soil and evenly distributes wheat seeds at a specific row spacing and depth within the furrows, then covers the seeds with soil and compacts them. To ensure sufficient nutrition for the wheat, a certain amount of organic and chemical fertilizers can be evenly distributed during sowing, similar to the method used for wheat sowing. This improves seed germination rate and disease resistance. During wheat sowing, efforts should be made to improve the uniformity of seed distribution. While ensuring all seeds are of good quality, seeds should be distributed as evenly as possible according to row and plant spacing. This helps reduce ground evaporation, ensures sufficient nutrition and water for the wheat seedlings, prevents overcrowding, and guarantees the quality of wheat growth, thereby achieving water conservation and increased yield.

[0003] In the prior art, Chinese utility model publication CN209151509U discloses a wheat uniform seeding machine, including a seeding mechanism. The seeding mechanism includes a seed box, a seed-spreading roller, a seed-sowing tube, and a uniform seeder. The seed box is mounted on a frame, and a discharge nozzle is located at the lower end of the seed box. A through hole is provided on the side wall of the discharge nozzle. The seeding roller is fitted into the through hole on the discharge nozzle. The diameter of the seeding roller matches the length of the discharge nozzle to prevent wheat seeds from flowing out from the gap between the discharge nozzle and the seeding roller. Grooves are evenly distributed on the seeding roller. When the seeding roller rotates, wheat seeds flow out from the groove. The inlet of the seeding tube is located directly below the outlet of the seeding box. The wheat seeds enter the seeding tube from the seed box. The outlet of the seeding tube is connected to the inlet of the seed distributor. The upper end of the seed distributor is tubular, and the lower end of the seed distributor is equipped with a first seeding plate and a second seeding plate. The wheat seeds fall from the upper end of the seed distributor onto the first seeding plate. The first and second seeding plates are at an angle, and the second seeding plate is tilted downwards. The wheat seeds bounce off the first and second seeding plates and fall to the ground. Although the seeding mechanism of this integrated wheat seed distributor can improve the dispersion of wheat seeding, the seeding spacing and plant spacing are difficult to control during the seed bounce process. Furthermore, due to the lack of precise control measures for the amount of wheat seeds fed, there is still a certain probability that some seeds will be close together, resulting in the wheat seeds not being evenly distributed according to the planting spacing. Summary of the Invention

[0004] Based on the aforementioned background technology needs, this application provides a wide-width wheat sowing device, which facilitates precise sowing of wheat seeds at appropriate intervals and plant spacing, not only improving the dispersion of wheat sowing but also enabling precise control of the sowing amount.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] A wide-width wheat sowing device includes a walking frame and several single-seed sowing components. The single-seed sowing components are arranged in an array at intervals along the width of the walking frame. Each single-seed sowing component includes a seed feeding box, a negative-pressure seed suction roller, a drive motor, and a sowing tube. A seed outlet is provided on one side of the seed feeding box. The negative-pressure seed suction roller is rotatably positioned at the seed outlet, and its rolling surface is fitted to the seed outlet. Seed suction holes are distributed in a ring-shaped pattern around the rolling surface of the negative-pressure seed suction roller. A negative pressure space is formed inside the negative-pressure seed suction roller relative to its outside, and the seed suction holes are all connected to the negative pressure space. The drive motor is drively connected to the seed suction roller. A seed-pulling component is provided at one end of the sowing tube. The seed-pulling component is located on the moving path of the seed suction holes, and one side of it is close to the negative-pressure seed suction roller. The seed-pulling component guides the wheat seeds at the seed suction holes into the sowing tube. The other end of the sowing tube extends along the direction of gravity.

[0007] Preferably, the seed suction holes are distributed in several groups at intervals along the axial direction of the negative pressure seed suction roller, the number of seeding tubes is the same as the number of groups of seed suction holes, and any seeding tube corresponds to any group of seed suction holes.

[0008] Preferably, the single-seed sowing assembly further includes a row spacing adjustment mechanism, which is connected to the end of the sowing tube away from the negative pressure seed suction roller. The row spacing adjustment mechanism is used to adjust the distance between the ends of adjacent sowing tubes away from the negative pressure seed suction roller.

[0009] Preferably, the row spacing adjustment mechanism includes a suspension beam, a transverse slide bar, and several sets of disc-type furrow openers. One end of the suspension beam is connected to the walking frame, and the other end is fixedly connected to at least one of the several sets of disc-type furrow openers or the transverse slide bar. The disc-type furrow openers are distributed at intervals along the transverse slide bar and are all slidably connected to the transverse slide bar in the transverse direction. The end of the sowing tube away from the negative pressure seed suction roller is connected to the disc-type furrow openers one by one.

[0010] Preferably, the seed-dispensing component includes a fixing plate and bristles. The fixing plate is inserted into the inner side of one end of the seeding tube adjacent to the negative pressure seed suction roller along the direction of gravity. The bristles are densely laid in a plate shape on one side of the fixing plate, with one end close to the rolling surface of the negative pressure seed suction roller. The width of the bristles is at least able to cover the diameter of any of the seed suction holes.

[0011] Preferably, the negative pressure seed suction roller has a positioning groove in a ring shape along the circumference of the roller surface, the seed suction hole is arranged along the extension direction of the positioning groove, one end of the bristles extends into the positioning groove, and the width of the bristles is not greater than the width of the positioning groove.

[0012] Preferably, the wide-width wheat sowing device further includes a negative pressure forming component, which includes an air pump, an airflow splitter, and several suction pipes. The air inlet of the air pump is connected to several suction pipes through the airflow splitter. An air outlet is provided on one side of the negative pressure seed suction roller. One side of the air outlet is connected to the negative pressure space, and the other side is sealed to the suction pipe and rotatably connected.

[0013] Preferably, the single-seed sowing assembly further includes a seed storage cavity, which is snapped onto one side of the seed feeding box, and the negative pressure seed suction roller is located inside the seed storage cavity. The bottom of the seed storage cavity is provided with a through hole, and the sowing tube passes through the through hole and is sealed to the through hole.

[0014] Preferably, the internal space of the seed storage cavity is funnel-shaped, and the bottom of the seed storage cavity is provided with a discharge port at a distance from the through hole. A baffle is hinged at the discharge port, and the baffle can rotate around the hinge between a first position and a second position.

[0015] Preferably, a guide groove is provided on one side of the baffle door adjacent to the internal space of the seed storage cavity. When the baffle door is in the second position, the guide groove is used to guide wheat seeds out of the seed storage cavity.

[0016] By adopting the above technical solution, compared with the prior art, this application has at least the following beneficial effects:

[0017] As the walking frame moves across the land, the drive motor controls the rotation speed of the negative pressure seed suction roller to pick up wheat seeds. The seed-dispensing component then successively dispenses individual seeds from the suction holes and sows them along the sowing furrows via the sowing pipe. When the circumference of a single seed moved by the negative pressure seed suction roller within the time it takes to sow a single seed equals the set sowing spacing, the wide-width wheat sowing device can achieve sowing one seed at a time according to the set spacing. This not only achieves precise control of the sowing quantity but also prevents seeds from getting too close together during row sowing. Furthermore, the several single-seed sowing components arranged in a transverse array along the walking frame can simultaneously sow individual seeds, ensuring that wheat seeds are planted according to the row sowing spacing. In summary, this improves the dispersion of wheat sowing and the accuracy of controlling the sowing quantity. Attached Figure Description

[0018] Figure 1This is a side view of the wide-span wheat sowing device in the embodiment.

[0019] Figure 2 This is a partial frontal view of the single-seed sowing component in the embodiment.

[0020] Figure 3 This is a partial cross-sectional view AA of the single-seed sowing component in the embodiment.

[0021] Figure 4 This is a partial structural diagram of the single-seed sowing component in the embodiment.

[0022] Figure 5 This is a magnified view (B) of the single-seed sowing component in the embodiment.

[0023] Figure 6 This is a partial schematic diagram of the line spacing adjustment mechanism in the embodiment.

[0024] Figure 7 This is a partial top view of the negative pressure forming component in the embodiment.

[0025] Figure 8 This is a partial schematic diagram of the seed storage cavity in the embodiment.

[0026] In the diagram: walking frame 10, single seed sowing component 20, seed feeding box 21, seed outlet 211, negative pressure seed suction roller 22, seed suction hole 221, positioning groove 222, air outlet 223, drive motor 23, sowing tube 24, seed feeding component 25, fixing plate 251, brush bristles 252, row spacing adjustment mechanism 26, suspension beam 261, transverse slide bar 262, disc furrow opener 263, seed storage cavity 27, through hole 271, material outlet 272, material gate 273, guide groove 2731, negative pressure forming component 30, air pump 31, airflow distributor 32, and exhaust pipe 33.

[0027] It should be noted that, in order to demonstrate more details of the wide-row wheat planting device and to help people better understand the contents of this application, the above-mentioned appendix... Figure 1-8 Some of the accompanying drawings have been partially interrupted, partially sectional, and partially omitted. For example, to show the structure of the negative pressure seed suction roller 22, the accompanying drawings have been partially omitted. Figure 2 and attached Figure 4 The seed storage cavity 27 was partially omitted; the connection between the seed dispensing component 25 and the sowing tube 24 was omitted as well. Figure 5 A partial sectional view of one of the seeding tubes 24 is shown; to reduce the scale of the attached drawing and show more details, please refer to the attached drawing. Figure 2 Appendix Figure 4 and appendix Figure 7 Each section has been partially partitioned, and none of the above treatments will have a negative impact on the product details to be displayed in this application. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of this application will be further described below with reference to the accompanying drawings of the embodiments, and this application is not limited to the following specific implementation methods.

[0029] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "inner," "outer," "left," "right," "front," "rear," "top," and "bottom" indicate directions or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0030] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The present application will be further described in detail with reference to specific embodiments.

[0031] This application discloses a wide-width wheat sowing device (hereinafter referred to as "sowing device" or "device"), which includes a traveling frame 10 and a plurality of single-seed sowing components 20. The plurality of single-seed sowing components 20 are arranged in an array at intervals along the width extension direction of the traveling frame 10. Each single-seed sowing component 20 can control the wheat sowing amount and realize the sowing of wheat seeds one by one. By arranging multiple single-seed sowing components 20 in an array, the sowing width can be increased and the sowing efficiency can be improved. Specifically, the traveling frame 10 can be used to support the active movement of the single-seed sowing components or towed movement by a traction device (such as a tractor). During the movement of the traveling frame 10 along the length extension direction of the sowing furrow, the single-seed sowing components 20 can sow along the sowing furrow.

[0032] Specifically, the single-seed sowing assembly 20 includes a seed feeding box 21, a negative pressure seed suction roller 22, a drive motor 23, and a sowing tube 24. The bottom of the seed feeding box 21 has a seed outlet 211 that fits with the rolling surface of the negative pressure seed suction roller 22. The top of the seed feeding box 21 is connected to a seed storage bin. The seed feeding box 21 allows seeds in the seed storage bin to be discharged along the direction of gravity and approach the negative pressure seed suction roller 22. The rolling surface of the negative pressure seed suction roller 22 has several seed suction holes 221 arranged in a ring around its circumference, and the interior of the negative pressure seed suction roller 22 can form a negative pressure space through a vacuum principle. All the aforementioned seed suction holes 221 are connected to this negative pressure space. Supports are provided on both sides of the seed feeding box 21, extending towards the discharge direction of the seed outlet 211. The pressure-type seed suction roller 22 is rotatably mounted at the seed outlet 211 via a bracket, and its (referring to the negative pressure seed suction roller 22) rolling surface fits into the seed outlet 211, that is, the rolling surface can cover the outside of the seed outlet 211 during rotation. The drive shaft of the drive motor 23 is connected to the bottom surface of one side of the negative pressure seed suction roller 22 for driving the negative pressure seed suction roller 22 to rotate, so that the negative pressure seed suction roller 22 adsorbs wheat seeds to the seed suction hole 221 during rotation. One end of the sowing tube 24 extends upward to a position close to the lower side of the negative pressure seed suction roller 22, and a seed-picking component 25 is provided at this end. The seed-picking component 25 is located on the moving path of the seed suction hole 221 and at least partially close to the rolling surface of the negative pressure seed suction roller 22. The other end of the sowing tube 24 extends downward along the direction of gravity.

[0033] It should be noted that, firstly, in order to ensure that the above-mentioned device can achieve the speed of seed suction and dispensing by changing the rotation speed of the negative pressure seed suction roller 22, the drive motor 23 is preferably a variable frequency motor, which can provide different power to the negative pressure seed suction roller 22 to achieve the speed change. In addition, in order to adapt to different speeds according to different sowing spacings, the drive motor 23 can also be connected to the negative pressure seed suction roller 22 through a speed change mechanism (such as a reduction gear set) to achieve a speed change effect; secondly, in order to enable the seed feeding component 25 to guide the wheat seeds at the seed suction hole 221 into the sowing tube 24 The seeds fall into the sowing furrow along the sowing tube 24. Although the seed-dispensing component 25 is fixed to one end of the sowing tube 24, it can ensure that the opening of the sowing tube 24 is open, so that the wheat seeds dispensing from the seed suction port by the seed-dispensing component 25 can enter the sowing tube 24. Third, in order to prevent the wheat seeds from being sucked into the negative pressure seed suction roller 22, the opening diameter of the seed suction hole 221 should be at least smaller than the average particle size of the wheat seeds. In order to prevent the seed suction hole 221 from being blocked, the wheat seeds stored in the seed feeding box 21 should be subjected to strict dust removal, particle size selection and other optimization treatments in advance to ensure that the seeds are relatively clean and have a uniform particle size.

[0034] When using the above-mentioned sowing device, after completing the preparatory work or process such as tilling, ditching, and fertilizing before sowing, the walking frame 10 carries several single-seed sowing components 20 arranged in a horizontal array to sow along the sowing furrow. The specific steps are as follows: First, a negative pressure space is generated in the negative pressure seed suction roller 22 by the vacuum principle. Then, the drive motor 23 is started, and the drive motor 23 drives the seed suction roller to rotate at a set speed, so that each seed suction hole 221 passing through the seed outlet 211 can absorb a wheat seed. When the seed suction hole 221 with wheat seeds is absorbed passes the seed-dispensing component 25, the seed-dispensing component 25 successively dispenses the wheat seeds away from the seed suction hole 221. When the wheat seeds are misaligned with the seed suction hole 221, they fall to the sowing tube 24 under gravity and are successively sown into the sowing furrow by the sowing tube 24.

[0035] Using the above-described seeding device has at least the following beneficial effects:

[0036] As the walking frame 10 travels on the land, the drive motor 23 controls the rotation speed of the negative pressure seed suction roller 22 to suck up wheat seeds. With the help of the seed-picking component 25, individual seeds are successively pushed out of the seed suction hole 221 and sown along the sowing furrow through the sowing tube 24. When the circumference of a seed moved by the negative pressure seed suction roller 22 during the time of sowing equals the set sowing plant spacing, the sowing equipment can achieve sowing one seed at a time according to the set sowing plant spacing. This not only achieves the effect of precise control of the sowing amount, but also avoids the situation where seeds are close to each other during the row sowing process. In addition, several single-seed sowing components 20 arranged in a horizontal array along the walking frame 10 can simultaneously sow individual seeds, so that wheat seeds are planted according to the row sowing spacing. In summary, this can improve the dispersion of wheat sowing and the accuracy of controlling the sowing amount.

[0037] In addition, this application provides some more specific embodiments to improve the above-mentioned seeding device.

[0038] Based on the above embodiments, in order to improve the sowing efficiency of a single seed sowing component 20, the above-mentioned seed suction holes 221 arranged in a ring are arranged in several groups at intervals along the axial direction of the negative pressure seed suction roller 22, and the number of sowing tubes 24 is the same as the number of groups of seed suction holes 221, and any sowing tube 24 is correspondingly matched with any group of seed suction holes 221. The specific layout is as follows: When using a walking frame 10 with a larger width to sow seeds over a large area, in order to improve sowing efficiency and make full use of the planting area, the operator equips the single-seed sowing component 20 with a negative pressure seed suction roller 22 with a length greater than twice the row sowing spacing. Due to its long length, the negative pressure seed suction roller 22 can have 2 to 3 sets of seed suction holes 221 distributed along its axis. The spacing between each set of seed suction holes 221 is equal to the row sowing spacing, that is, the furrow spacing. At the same time, according to the number of sets of seed suction holes 221, the negative pressure seed suction roller 22 is matched with a corresponding number of sowing tubes 24. The sowing tubes 24 can preferably be flexible, such as corrugated plastic tubes or stainless steel flexible tubes, so as to adjust the spacing and sowing angle of the lower end of the sowing tubes 24. In addition, since the number of seed suction holes 221 is increased, the vacuum equipment used to generate the negative pressure space should also be appropriately increased in exhaust power so that each seed suction hole 221 can maintain the set suction force to achieve the effect of sucking wheat seeds.

[0039] Using the above-described structural configuration can improve the overall seeding quantity and efficiency of the seeding device, increase the seeding width and the seeding area per unit time, and make the seeding device more suitable for seeding large areas of flat ground.

[0040] Furthermore, in order to enable the above-mentioned sowing device to adjust the sowing spacing according to the row spacing to improve the adaptability of the sowing device, the above-mentioned single-seed sowing component 20 also includes a row spacing adjustment mechanism 26. Several sets of the row spacing adjustment mechanism 26 can be set. Any set of row spacing adjustment mechanisms 26 is connected to at least each sowing tube 24 correspondingly set in any single-seed sowing component 20. The row spacing adjustment mechanism 26 can adjust the distance between the lower ends of adjacent sowing tubes 24, so that the sowing tubes 24 can adjust the sowing spacing according to the sowing needs.

[0041] Specifically, in a preferred embodiment, the row spacing adjustment mechanism 26 includes a suspension beam 261, a transverse slide bar 262, and several sets of disc-type furrow openers 263. The row spacing adjustment mechanism 26 can be set in several sets corresponding to the number of single-seed sowing components 20. One end of the suspension beam 261 is fixed to the lower side of the walking frame 10, and the other end of the suspension beam 261 is connected to at least one of the disc-type furrow openers 263 or fixedly connected to one side of the transverse slide bar 262. The disc-type furrow openers 263 are distributed at intervals along the transverse slide bar 262 and are slidably connected to the transverse slide bar 262. The lower end of the sowing tube 24 is connected to the disc-type furrow openers 263 one by one. The aforementioned disc-type furrow opener 263 includes a fixed rib and a pair of symmetrical circular soil-breaking blades arranged at an angle. The pair of circular soil-breaking blades are fixed to the lower side of the fixed rib by a support arm arranged on both sides of the fixed rib. The upper side of the fixed rib is also provided with a slider and a mounting hole at intervals. A groove is opened horizontally along the upper edge of the slider for sliding cooperation with the horizontal slide rod 262. The disc-type furrow opener 263 can be slidably sleeved on the horizontal slide rod 262 through the groove. A fixing bolt is provided on one side of the groove. By loosening or tightening the fixing bolt, the fixed state can be released or restored to the fixed state, so as to adjust the distance between the disc-type furrow openers 263. The lower end of the seeding tube 24 extends through the above-mentioned mounting hole to the space between the pair of circular soil-breaking blades.

[0042] When using the above-mentioned sowing device, the disc-shaped furrow opener 263 can be moved by sliding along the transverse slide bar 262 to adjust the transverse sowing spacing. The disc-shaped furrow opener 263 can not only perform secondary fine furrowing in the existing sowing furrows and further break up the soil clods in the sowing furrows to make the sowing furrows uniform in depth, but also partially block the lower end of the sowing tube 24, which plays a certain role in wind protection and orientation during the sowing process, and helps wheat seeds to accurately enter the sowing furrows.

[0043] In one embodiment, the seed-dispensing component 25 includes a fixing plate 251 and bristles 252. Specifically, a slot is provided on the inner side of the end of the seed tube 24 near the negative pressure seed suction roller 22, and the fixing plate 251 is inserted into the slot along the direction of gravity. The bristles 252 are densely laid on the side of the fixing plate 251 adjacent to the negative pressure seed suction roller 22 and form a plate-like structure. One end of the bristles 252 is in close contact with the rolling surface of the negative pressure seed suction roller 22, and the laying width of the bristles 252 corresponding to any set of seed suction holes 221 can at least cover the aperture of any of the seed suction holes 221.

[0044] The beneficial effects of using the seed-dispensing component 25 with the above structure are as follows: When the bristles 252 that are in close contact with the rolling surface of the negative pressure seed-absorbing roller 22 come into contact with the wheat seeds adsorbed by the seed-absorbing hole 221, because the texture of the bristles 252 is relatively soft, after the bristles 252 dispense the wheat seeds away from the seed-absorbing hole 221, some of the bristles 252 are sucked into the seed-absorbing hole 221. This can prevent the wheat seeds that have just been dispensed from being adsorbed by the seed-absorbing hole 221 again. In addition, the friction between the bristles 252 and the rolling surface is small, which can reduce the friction on the negative pressure seed-absorbing roller 22 while ensuring the dispensing effect on the wheat seeds, thus extending the service life of the negative pressure seed-absorbing roller 22.

[0045] Based on the above embodiments, the rolling surface of the negative pressure seed suction roller 22 is provided with a positioning groove 222 in a ring shape along the circumference, each set of seed suction holes 221 is arranged along the extension direction of the positioning groove 222, and one end of the bristles 252 extends into the positioning groove 222, and the laying width of the bristles 252 is not greater than the width of the positioning groove 222.

[0046] When using the above-mentioned sowing device, the positioning groove 222 can concentrate the suction force of the seed suction hole 221 around the seed suction hole 221, so that the adsorbed wheat seeds are distributed along the positioning groove 222, and the bristles 252 can cover the positioning groove 222 along the width direction of the positioning groove 222, which can ensure that the wheat seeds are pushed away from the seed suction hole 221, and can work with the positioning groove 222 to ensure that the peeled seeds are accurately put into the sowing tube 24.

[0047] Furthermore, the above-mentioned seeding device also includes a negative pressure forming component 30, which is used to evacuate the negative pressure seed suction roller 22. The negative pressure forming component 30 includes an air pump 31, an airflow splitter 32, and an air extraction pipe 33. The air inlet of the air pump 31 is connected to several air extraction pipes 33 through the airflow splitter 32. An air outlet 223 is provided on one side of the negative pressure seed suction roller 222. One side of the air outlet 223 is connected to the negative pressure space, and the other side is sealed to the air extraction pipe 33 through a rotary joint and is rotatably connected. Specifically, the aforementioned airflow splitter 32 is provided with several interconnected or independent air inlets. These air inlets are connected to the air outlet 223 of each negative pressure seed suction roller 22 via an air extraction pipe 33. By turning on the air pump 31, air is extracted, so that a negative pressure space is simultaneously formed inside the several negative pressure seed suction rollers 22. In addition, the rotary joint used to rotatably and sealingly connect the air extraction pipe 33 and the air outlet 223 has both the function of partial rotation and connecting pipelines, such as the one disclosed in CN208982847U. The Chinese utility model discloses a rotary joint with good sealing performance. The rotary joint has an inner tube inside, through which fluid is transported. The rotary joint consists of a main connector and a secondary connector, which can rotate relative to each other. Both the main connector and the secondary connector have threads on their surfaces for connecting the pipes at both ends. The main connector and the secondary connector are connected to the air outlet 223 and the air extraction pipe 33 respectively through the threads. When the negative pressure seed suction roller 22 rotates, the main connector rotates relative to the secondary connector and can extract air outward through the inner tube, so that a negative pressure space can be formed inside the negative pressure seed suction roller 22. (Since the specific structure of this rotary joint is not a necessary technical feature for realizing this application, its structural appearance has been omitted in the attached drawings and will not be described again hereafter.)

[0048] Furthermore, to prevent seeds adsorbed by the negative pressure seed suction roller 22 from falling outside the sowing furrow due to unstable suction or blockage of the seed suction hole 221, thus causing seed leakage and waste, the above-mentioned single-seed sowing component 20 also includes a seed storage cavity 27. The seed storage cavity 27 has a snap-fit ​​opening on its upper side and is snapped into the bottom of the seed feeding box 21. The negative pressure seed suction roller 22 is surrounded inside the seed storage cavity 27. The seed storage cavity 27 can collect wheat seeds that fall from the seed suction hole 221 due to the above factors, thus avoiding wheat seed waste. The bottom of the seed storage cavity 27 is also provided with a through hole 271. The sowing tube 24 extends downward through the through hole 271 and is sealed to the through hole 271, so that the sowing tube 24 can sow normally while preventing seeds from leaking out from the gap between the sowing tube 24 and the through hole 271.

[0049] Based on the above embodiment, the internal space of the seed collection cavity 27 is funnel-shaped, and a discharge port 272 is provided at its bottom at intervals from the through hole 271. The operator can collect any missed seeds collected in the seed collection cavity 27 through the discharge port 272. A baffle gate 273 can be hinged to the discharge port 272. The baffle gate 273 can rotate around the hinge part between a first position and a second position so that the discharge port 272 is closed or opened.

[0050] Furthermore, to facilitate the operator in opening the aforementioned baffle gate 273 to collect the seeds, a guide groove 2731 is provided on the side of the baffle gate 273 adjacent to the internal space of the seed collection cavity 27. When the baffle gate 273 is rotated to the second position, the guide groove 2731 is used to guide the wheat seeds to flow out of the seed collection cavity 27. That is, the operator only needs to place the container under the baffle gate 273 and open the baffle gate 273 to the second position, so that the baffle gate 273 and the discharge port 272 form an inclined surface that facilitates the stable flow of wheat seeds. The guide groove 2731 can ensure that the wheat seeds fall stably and prevent the wheat seeds from flowing out from both sides of the baffle gate 273, thereby increasing the convenience for the operator to collect wheat seeds.

[0051] By combining the various structures and features in the above embodiments, the above-described seeding device can reduce seed waste while improving seeding efficiency and accuracy.

[0052] Obviously, the above embodiments of this application are merely examples for clearly illustrating this application, and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A wide-row wheat sowing device, characterized in that, The device includes a walking frame and several single-seed sowing components. These components are arranged in an array at intervals along the width of the walking frame. Each single-seed sowing component includes a seed feeding box, a negative-pressure seed suction roller, a drive motor, and a sowing tube. The seed feeding box has a seed outlet on one side. The negative-pressure seed suction roller is rotatably positioned at the seed outlet, with its rolling surface fitting against it. The rolling surface of the negative-pressure seed suction roller has seed suction holes distributed in a ring around its circumference. A negative pressure space is formed inside the negative-pressure seed suction roller relative to its outside, and all seed suction holes communicate with this negative pressure space. The drive motor is connected to the seed suction roller. One end of the sowing tube has a seed-guiding component located on the moving path of the seed suction holes, with one side close to the negative-pressure seed suction roller. The seed-guiding component guides wheat seeds from the seed suction holes into the sowing tube. The other end of the sowing tube extends along the direction of gravity.

2. The wide-row wheat sowing device as described in claim 1, characterized in that, The seed suction holes are distributed in several groups at intervals along the axial direction of the negative pressure seed suction roller. The number of seeding tubes is the same as the number of groups of seed suction holes, and any seeding tube corresponds to any group of seed suction holes.

3. The wide-row wheat sowing device as described in claim 2, characterized in that, The single-seed sowing assembly also includes a row spacing adjustment mechanism, which is connected to the end of the sowing tube away from the negative pressure seed suction roller. The row spacing adjustment mechanism is used to adjust the distance between the ends of adjacent sowing tubes away from the negative pressure seed suction roller.

4. The wide-row wheat sowing device as described in claim 3, characterized in that, The row spacing adjustment mechanism includes a suspension beam, a transverse slide bar, and several sets of disc-type furrow openers. One end of the suspension beam is connected to the walking frame, and the other end is fixedly connected to at least one of the several sets of disc-type furrow openers or the transverse slide bar. The disc-type furrow openers are distributed at intervals along the transverse slide bar and are all slidably connected to the transverse slide bar in the transverse direction. The end of the sowing tube away from the negative pressure seed suction roller is connected to the disc-type furrow openers one by one.

5. The wide-row wheat sowing device as described in claim 1, characterized in that, The seed-dispensing component includes a fixing plate and bristles. The fixing plate is inserted into the inner side of one end of the seed tube adjacent to the negative pressure seed suction roller along the direction of gravity. The bristles are densely laid in a plate shape on one side of the fixing plate, with one end close to the rolling surface of the negative pressure seed suction roller. The width of the bristles is at least able to cover the diameter of any of the seed suction holes.

6. The wide-row wheat sowing device as described in claim 5, characterized in that, The negative pressure seed suction roller has a positioning groove in a ring shape along its circumference. The seed suction holes are arranged along the extension direction of the positioning groove. One end of the bristles extends into the positioning groove, and the width of the bristles is not greater than the width of the positioning groove.

7. The wide-row wheat sowing device as described in claim 1, characterized in that, It also includes a negative pressure forming component, which includes an air pump, an airflow splitter, and several suction pipes. The air inlet of the air pump is connected to several suction pipes through the airflow splitter. One side of the negative pressure seed suction roller is provided with an air outlet. One side of the air outlet is connected to the negative pressure space, and the other side is sealed to the suction pipe and rotatably connected.

8. The wide-row wheat sowing device as described in claim 1, characterized in that, The single-seed sowing assembly also includes a seed storage cavity, which is snapped onto one side of the seed feeding box, and the negative pressure seed suction roller is located inside the seed storage cavity. A through hole is provided at the bottom of the seed storage cavity, and the sowing tube passes through the through hole and is sealed to the through hole.

9. The wide-row wheat sowing device as described in claim 8, characterized in that, The internal space of the seed storage cavity is funnel-shaped, and the bottom of the seed storage cavity is provided with a discharge port at intervals from the through hole. A baffle is hinged at the discharge port, and the baffle can rotate around the hinge between a first position and a second position.

10. The wide-row wheat sowing device as described in claim 9, characterized in that, A guide groove is provided on one side of the baffle door adjacent to the internal space of the seed storage cavity. When the baffle door is in the second position, the guide groove is used to guide wheat seeds to flow out of the seed storage cavity.

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