Auxiliary flow guiding and air pressurized seed metering device

Abstract

The application provides an auxiliary flow-assisted seed filling pneumatic seed metering device, which comprises a mounting shell, a seed metering assembly and a seed cleaning and dropping assembly. The mounting shell comprises a first shell and a second shell, and the first shell is provided with an air inlet, a seed inlet and a seed outlet. The seed metering assembly comprises a seed metering disc and a driving member. The seed metering disc has a conical flow dividing part and a plurality of arc-shaped flow guide grooves arranged on the circumferential side of the conical flow dividing part. The end of each arc-shaped flow guide groove is provided with a seed hole for adsorbing a seed. The driving member is used for driving the seed metering disc to rotate. The seed cleaning and dropping assembly comprises a seed scraping knife and a gas blocking member. The seed scraping knife is used for scraping the seeds at both ends of the seed hole moving to the seed cleaning area, so that each seed hole adsorbs one seed. The gas blocking member is used for sequentially abutting with each seed hole moving to the seed dropping area, so that the seeds in each seed hole drop into the seed outlet. The auxiliary flow-assisted seed filling pneumatic seed metering device provided by the application aims to solve the problems of poor seed filling effect and unstable and inaccurate seed dropping of the conventional pneumatic seed metering device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seed metering device, and particularly relates to an auxiliary flow guiding seed filling pneumatic seed metering device. BACKGROUND

[0002] At present, in the seed filling stage of the pneumatic seed metering device, the positive pressure airflow filled into the chamber of the seed metering device vertically acts on the seed metering disc, and turbulence is easily formed in the chamber, and the turbulence at the type hole affects the seed covering performance and the seed filling effect of the seed metering device; and in the seed dropping stage, the flow direction of the positive pressure airflow filled into the chamber of the seed metering device is inconsistent with the flow guiding direction of the seed guiding pipe, and the speed and direction of the airflow are easily obviously changed when the airflow enters the seed guiding pipe, so that the seed dropping is unstable and inaccurate. SUMMARY

[0003] The present application provides an auxiliary flow guiding seed filling pneumatic seed metering device, and aims to solve the problems of poor seed filling effect and unstable and inaccurate seed dropping of the pneumatic seed metering device in the prior art.

[0004] In view of the problems in the prior art, the present application provides an auxiliary flow guiding seed filling pneumatic seed metering device, which comprises:

[0005] The mounting shell comprises a first shell and a second shell which are detachably connected, the first shell is provided with an air inlet, a seed inlet and a seed outlet respectively, the first shell and the second shell form a mounting cavity, the mounting cavity comprises a seed filling region, a seed conveying region, a seed cleaning region and a seed dropping region which are sequentially arranged, the seed filling region corresponds to the seed inlet, and the seed dropping region corresponds to the seed outlet;

[0006] The seed metering assembly comprises a seed metering disc and a driving member which are arranged in the mounting cavity, the seed metering disc has a conical flow dividing part and a plurality of arc-shaped flow guiding grooves which are arranged on the circumferential side of the conical flow dividing part, the conical flow dividing part is arranged corresponding to the air inlet and is used for dividing the airflow into each arc-shaped flow guiding groove, the end part of the arc-shaped flow guiding groove is provided with a seed hole which is used for fixing a seed, and the driving member is used for driving the seed metering disc to rotate, so that the seed on the seed hole sequentially passes through the seed filling region, the seed conveying region, the seed cleaning region and the seed dropping region; and

[0007] The seed cleaning and dropping assembly comprises a seed scraping knife and a gas blocking member which are arranged in the mounting cavity, the seed scraping knife is arranged corresponding to the seed cleaning region and is used for scraping the seeds at both ends of the seed hole which move to the seed cleaning region, so that each seed hole adsorbs one seed, and the gas blocking member is arranged close to the seed outlet and is used for sequentially abutting each seed hole which moves to the seed dropping region, so that the seeds at each seed hole fall to the seed outlet.

[0008] According to the present invention, an auxiliary flow guiding and filling air pressure seed metering device is provided, wherein the conical flow dividing part includes a base plate and a plurality of flow dividing plates inclinedly disposed on the base plate, a flow dividing groove is formed between two adjacent flow dividing plates, one end of the flow dividing groove is connected to the air inlet, and the other end is connected to the arc-shaped flow guiding groove.

[0009] According to the present invention, the width of each of the diversion grooves is gradually increased from the air inlet toward the diversion groove.

[0010] According to the present invention, an auxiliary flow guiding and filling pneumatic seed metering device is provided, wherein the driving component includes a driving shaft, the driving shaft is disposed in the second housing and is drivingly connected to the seed metering disc.

[0011] According to the present invention, an auxiliary flow-guiding and filling pneumatic seed metering device is provided, wherein the seed scraper includes a first arc-shaped segment and a second arc-shaped segment arranged at intervals, the first arc-shaped segment and the second arc-shaped segment respectively corresponding to the two ends of the seed hole, and used to scrape the seeds at both ends of the seed hole; the curvature of the first arc-shaped segment and the second arc-shaped segment is adapted to the curvature of the seed metering disc, and a seed guiding channel is formed between the first arc-shaped segment and the second arc-shaped segment.

[0012] According to the present invention, an auxiliary flow guiding and filling pneumatic seed metering device is provided, wherein the seed scraper further includes a mounting part, the mounting part including a mounting plate and a mounting shaft disposed on one side of the mounting plate, the mounting plate being movably disposed on the inner wall of the first housing so that the mounting position of the mounting plate in the first housing is adjustable, and the first arc segment and the second arc segment being movably connected to the mounting shaft so that the distance between the first arc segment and the second arc segment and the seed hole is adjustable.

[0013] According to the present invention, an auxiliary flow guiding and filling air pressure seed metering device is provided, wherein the air blocking component includes a first mounting rod and an air blocking wheel rotatably disposed at the end of the first mounting rod, and the wheel wall of the air blocking wheel is used to slide against the side wall of the seed metering disc.

[0014] According to the present invention, an auxiliary flow guiding and filling air pressure seed metering device is provided, wherein the seed clearing and feeding assembly further includes a seed feeding component, the seed feeding component is disposed below the air blocking component, the seed feeding component includes a second mounting rod and a seed feeding wheel rotatably disposed at the end of the second mounting rod, the seed feeding wheel is disposed corresponding to the seed outlet, and a plurality of ribs are spaced apart on the wheel wall of the seed feeding wheel, each of the ribs being used to abut and remove the seeds left on the seed hole.

[0015] According to the auxiliary flow-assisted seed filling pneumatic seed metering device provided by the application, the inner wall of the first shell is further provided with a seed blocking plate, the seed blocking plate comprises a horizontal section and an inclined section connected in sequence, the horizontal section is located at the seed outlet, a through hole in communication with the seed outlet is formed in the horizontal section, and the end of the inclined section away from the horizontal section is arranged close to the seed inlet.

[0016] According to the auxiliary flow-assisted seed filling pneumatic seed metering device provided by the application, the outer wall of the first shell is provided with an air inlet pipe and an arc-shaped flow guide section, the air inlet pipe is in communication with the air inlet, the inlet of the arc-shaped flow guide section is in communication with the air inlet pipe, the outer wall of the first shell is further provided with a seed guide pipe, the seed guide pipe is in communication with the seed outlet, and the outlet of the arc-shaped flow guide section corresponds to the seed guide pipe.

[0017] The auxiliary flow-assisted seed filling pneumatic seed metering device provided by the application is specially used for high-speed precision seeding operation and is suitable for single-plant precision seeding crops such as corn and soybeans. By adopting the conical shunt type seed metering disc, the seeds filled into the installation cavity can be pushed into the seed hole under the action of the normal pressure airflow after being partially flowed by the conical shunt groove, the influence of the turbulent flow at the seed hole on the seed pressure cover is reduced, and the seed filling performance of the seed metering device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a side view structural schematic diagram of the auxiliary flow-assisted seed filling pneumatic seed metering device provided by the application;

[0020] Figure 2 is Figure 1 a partial disassembly structural schematic diagram of

[0021] Figure 3 is Figure 1 a structural schematic diagram of removing the first shell;

[0022] Figure 4 is Figure 1 a structural schematic diagram of the seed metering disc in

[0023] Figure 5 is Figure 1 an internal structural schematic diagram of the first shell in

[0024] 1: mounting housing; 2: first housing; 3: second housing; 4: air inlet; 5: seed inlet; 6: seed outlet; 7: mounting cavity; 8: seed delivery assembly; 9: seed delivery disc; 10: conical flow dividing portion; 11: arc-shaped flow guide groove; 12: seed hole; 13: seed cleaning assembly; 14: seed scraping knife; 15: air resistance member; 16: bottom plate; 17: flow dividing plate; 18: flow dividing groove; 19: drive shaft; 20: first arc-shaped section; 21: second arc-shaped section; 22: seed guiding channel; 23: mounting portion; 24: mounting plate; 25: mounting shaft; 26: first mounting rod; 27: air resistance wheel; 28: seed delivery member; 29: second mounting rod; 30: seed delivery wheel; 31: protruding rib; 32: seed blocking plate; 33: horizontal section; 34: through hole; 35: inclined section; 36: air inlet pipe; 37: arc-shaped flow guide section; 38: seed guiding pipe; 39: first mounting seat; 40: second mounting seat. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0026] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] In the embodiments of the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0029] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the present application will be described clearly and completely in the specification below, combined with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.

[0031] The technical scheme of the present application will be described below Figures 1-5 The auxiliary flow-assisted seed filling pneumatic seed metering device provided by the present application is described.

[0032] In view of the problems of poor seed filling effect and unstable and inaccurate seed delivery of the pneumatic seed metering device in the prior art, the present application provides an auxiliary flow-assisted seed filling pneumatic seed metering device, which comprises a mounting shell 1, a seed metering assembly 8 and a seed cleaning and delivering assembly 13.

[0033] Please refer to Figure 1 , Figure 2 and Figure 5, the mounting shell 1 comprises a first shell 2 and a second shell 3 which are detachably connected, the first shell 2 is respectively provided with an air inlet 4, a seed inlet 5 and a seed outlet 6, the first shell 2 and the second shell 3 enclose a mounting cavity 7, the mounting cavity 7 comprises a filling area, a conveying area, a cleaning area and a dropping area which are sequentially arranged, the filling area corresponds to the seed inlet 5, and the dropping area corresponds to the seed outlet 6. The first shell 2 and the second shell 3 are detachably connected, and the two can be connected by bolts or buckles. In order to ensure the strength of the first shell 2 and the second shell 3, the inner wall surfaces of the first shell 2 and the second shell 3 can be selectively provided with reinforcing rib plates.

[0034] The seed-ejecting assembly 8 comprises a seed-ejecting disc 9 and a driving member arranged in the mounting cavity 7, the seed-ejecting disc 9 has a conical flow dividing part 10 and a plurality of arc-shaped flow guide grooves 11 which are separately arranged on the circumferential side of the conical flow dividing part 10, the conical flow dividing part 10 is arranged corresponding to the air inlet 4, and the airflow enters the mounting cavity 7 from the air inlet 4 and is then divided to each arc-shaped flow guide groove 11 through the conical flow dividing part 10. The end part of the arc-shaped flow guide groove 11 is provided with a seed hole 12 for fixing seeds. The driving member is used to drive the seed-ejecting disc 9 to rotate, so that the seeds on the seed hole 12 pass through the filling area, the conveying area, the cleaning area and the dropping area in sequence. It should be noted that the seeds enter the mounting cavity 7 from the seed inlet 5 and fall and spread in the filling area under the action of gravity. The positive pressure airflow filled into the mounting cavity 7 is divided along the conical flow dividing part 10, and the seeds in the filling area are pushed into the arc-shaped flow guide groove 11 by the divided positive pressure airflow. Under the guiding and disturbing action of the arc-shaped flow guide groove 11, the seeds are affected by the vertical positive pressure on the surface of the seed-ejecting disc 9, and can move with the seed hole 12 of the seed-ejecting disc 9 under the action of the flow field pressure F, the gravity G and the friction forces Ff1 and Ff2, so as to complete the filling process.

[0035] Further, the cleaning and dropping seed assembly 13 comprises a seed scraping knife 14 and a gas blocking member 15 arranged in the mounting cavity 7, the seed scraping knife 14 is arranged corresponding to the cleaning area, the excess seeds on the seed hole 12 of the seed-ejecting disc 9 are scraped off by the seed scraping knife 14 and then return to the filling area for filling, and the remaining single seeds enter the dropping area; the gas blocking member 15 is arranged close to the seed outlet 6 and is used to abut against each seed hole 12 moving to the dropping area in sequence. When the seed hole 12 abuts against the gas blocking member 15, the positive pressure airflow covering the seeds is blocked, and the seeds lose the action of the positive pressure and fall into the seed outlet 6 under the joint action of the gravity and the centrifugal force in the tangent direction of the seed hole 12.

[0036] It should be noted that the auxiliary flow-assisted seed filling pressure seed metering device provided by the application is specially used for high-speed precision seeding operation and is suitable for single-plant precision seeding crops such as corn and soybeans. By adopting the conical flow distribution type seed metering disc 9, the seed filled into the installation cavity 7 can be pushed into the seed hole 12 under the action of the normal pressure airflow after being partially flowed by the conical flow distribution groove 18, the influence of the turbulent flow at the seed hole 12 on the seed pressure cover is reduced, and the seed filling performance of the seed metering device is improved.

[0037] Specifically, please refer to Figure 4 The conical flow distribution part 10 includes a bottom plate 16 and a plurality of flow distribution plates 17 obliquely arranged on the bottom plate 16, and a flow distribution groove 18 is formed between two adjacent flow distribution plates 17. One end of the flow distribution groove 18 is in communication with the air inlet 4, and the other end is in communication with the arc-shaped flow guide groove 11. It should be noted that the side of the conical flow distribution part 10 close to the first shell 2 is conical in side view, so the bottom plate 16 is a conical bottom plate 16, and the flow distribution plates 17 are obliquely arranged along the surface of the bottom plate 16 to form a conical structure. In order to further improve the thrust of the airflow on the basis of ensuring the stability of the airflow, the groove width of the flow distribution groove 18 is gradually increased from the air inlet 4 to the flow guide groove direction to form a horn-shaped structure, which is beneficial to pushing the seed from the flow guide groove into the seed hole 12.

[0038] It should be noted that the driving member can have various forms of arrangement, and the output shaft of the motor can be drivingly connected with the seed metering disc 9. In other optional embodiments, the driving member includes a driving shaft 19, and the driving shaft 19 is arranged through the second shell 3 and drivingly connected with the seed metering disc 9. In optional embodiments, a shaft coupling can be connected with the driving shaft 19, and the shaft coupling can be connected with the motor to achieve the driving effect of the seed metering disc 9.

[0039] When filling seeds, a seed is attached to the seed hole 12 due to the influence of the seed-to-seed friction force, but the two ends of the seed can also be bonded to other seeds, thereby affecting the effect of accurate seeding. In the technical scheme provided by the application, the seed scraping knife 14 includes a first arc-shaped section 20 and a second arc-shaped section 21 arranged at intervals, and the first arc-shaped section 20 and the second arc-shaped section 21 correspond to the two ends of the seed hole 12 respectively, so that the seeds at the two ends of the seed hole 12 can be scraped off, so that only one seed is adsorbed on the seed hole 12. It should be noted that the first arc-shaped section 20 and the second arc-shaped section 21 can be connected by a connecting section, and the first arc-shaped section 20 and the second arc-shaped section 21 also have a longitudinal distance from the seed hole 12, which is just the thickness of a seed. Further, the curvature of the first arc-shaped section 20 and the second arc-shaped section 21 is adapted to the curvature of the seed metering disc 9, and a seed guide channel 22 is formed between the first arc-shaped section 20 and the second arc-shaped section 21. While the seed metering disc 9 rotates, the seed can move to the seed throwing area through the seed guide channel 22.

[0040] Further, in order to improve the seeding adaptability of the seed metering device to different types of seeds, the seed scraping knife 14 further comprises a mounting portion 23, which comprises a mounting plate 24 and a mounting shaft 25 arranged on one side of the mounting plate 24. The mounting plate 24 is movably arranged on the inner wall of the first housing 2, which can be mounted through mounting holes arranged at different positions, or the one side of the mounting plate 24 can be slidingly connected to the inner wall of the first housing 2, so that the mounting position of the mounting plate 24 on the first housing 2 can be adjusted, facilitating the adaptation to seeds of different sizes and shapes. Further, the first arc-shaped section 20 and the second arc-shaped section 21 are movably connected to the mounting shaft 25, which can be movably sleeved on the mounting shaft 25, or a sliding groove can be arranged on the circumference of the mounting shaft 25, and the first arc-shaped section 20 and the second arc-shaped section 21 are slidingly connected to the mounting shaft 25 through the sliding groove, so that the distance between the first arc-shaped section 20 and the second arc-shaped section 21 and the seed hole 12 can be adjusted, which is also convenient for matching seeds of different sizes and shapes. Please refer to Figure 2 , the mounting plate 24 also comprises two arc-shaped sections corresponding to the first arc-shaped section 20 and the second arc-shaped section 21 respectively. Please refer to Figure 4 , in order to facilitate observation, Figure 4 , the mounting plate 24 is removed, and only the first arc-shaped section 20 and the second arc-shaped section 21 are reserved.

[0041] Specifically, the air blocking member 15 comprises a first mounting rod 26 and an air blocking wheel 27 rotatably arranged at the end of the first mounting rod 26, and the wheel wall of the air blocking wheel 27 is used for slidingly abutting against the side wall of the seed metering disc 9. It should be noted that the air blocking wheel 27 can be made of rubber material, which has small friction. When the seed metering disc 9 rotates, the seed holes 12 are sequentially attached to the wheel wall of the air blocking wheel 27, the positive pressure airflow covering the seeds is blocked, and the seeds lose the effect of positive pressure, so as to fall into the seed outlet 6. It should be noted that in the technical solution provided in the present application, the first mounting rod 26 is mounted on the first mounting seat 39, and the first mounting seat 39 is arranged in a split manner, which can also play a protective role on the basis of mounting the first mounting rod 26.

[0042] Further, the seed cleaning assembly 13 further comprises a seed dropping component 28, which is arranged below the air blocking component 15. The seed dropping component 28 comprises a second mounting rod 29 and a seed dropping wheel 30 rotatably arranged at the end of the second mounting rod 29. The seed dropping wheel 30 is arranged corresponding to the seed outlet 6. A plurality of convex ribs 31 are arranged on the wheel wall of the seed dropping wheel 30 at intervals. Each convex rib 31 is used to abut against the seed left on the seed hole 12. It should be noted that, generally, the seed will fall into the seed outlet 6 after contacting the air blocking wheel 27. In special cases, the seed may not be cleaned after passing through the air blocking wheel 27. In the technical scheme provided by the present application, by arranging the seed dropping wheel 30, when the seed hole 12 moves to the seed dropping wheel 30, the convex rib 31 on the seed dropping wheel 30 will extend into the seed hole 12, and the seed will be stripped and then fall into the seed outlet 6. In the technical scheme provided by the present application, the second mounting rod 29 is mounted on the second mounting seat 40. The second mounting seat 40 is arranged in a split manner, and can protect the second mounting rod 29 on the basis of mounting the second mounting rod 29.

[0043] As described above, the installation cavity 7 is divided into a seed filling area, a seed conveying area, a seed cleaning area and a seed dropping area. Please refer to Figure 3 The inner wall of the first shell 2 is further provided with a seed blocking plate 32. The seed blocking plate 32 comprises a horizontal section 33 and an inclined section 35 connected in sequence. The horizontal section 33 is located at the seed outlet 6. A through hole 34 is arranged on the horizontal section 33 and communicates with the seed outlet 6. The seed falls into the seed outlet 6 through the through hole 34. The end of the inclined section 35 away from the horizontal section 33 is arranged close to the seed inlet 5. The horizontal section 33 and the inclined section 35 can block the seed to a certain extent. On the other hand, the falling seed can slide into the seed filling area through the inclined section 35 and then be filled again.

[0044] Further, the outer wall of the first shell 2 is provided with an air inlet pipe 36 and an arc-shaped flow guide section 37. One end of the air inlet pipe 36 communicates with the fan, and the other end communicates with the air inlet 4. The inlet of the arc-shaped flow guide section 37 communicates with the air inlet pipe 36. The outer wall of the first shell 2 is further provided with a seed guide pipe 38, which communicates with the seed outlet 6. The outlet of the arc-shaped flow guide section 37 corresponds to the seed guide pipe 38. By arranging the arc-shaped flow guide section 37, the positive pressure airflow flows into the seed guide pipe 38 along the arc-shaped flow guide section 37. The speed and direction of the airflow do not change significantly, which can make the seed falling into the seed guide pipe 38 be dropped in the same direction and at a stable speed under the action of the positive pressure airflow in the seed guide pipe 38, and can significantly improve the seed dropping performance.

[0045] The auxiliary flow guiding and filling air pressure seed metering device is specially used for high-speed precision seeding operation, is suitable for single-plant precision seeding crops such as corn and soybean, and is improved in view of problems existing in the filling and seeding links of the current air pressure seed metering device, so as to improve the filling and seeding performance. The conical flow dividing part 10 is adopted, so that the seeds filled into the installation cavity 7 are pushed into the seed hole 12 under the action of the positive pressure airflow after being divided by the conical flow dividing part 10, the influence of the turbulent flow at the seed hole 12 on the seed pressure cover is reduced, and the filling performance of the seed metering device is improved; in the seeding link, the homologous positive pressure airflow and the arc flow guiding section 37 are combined, so that the positive pressure airflow of the outer ring flows into the seed guiding pipe 38 along the arc flow guiding section 37, the speed and direction of the airflow do not change obviously, the corn falling into the seed guiding pipe 38 is sent in the same direction and at a stable speed under the action of the positive pressure airflow in the seed guiding pipe 38, and the seeding performance of the seed metering device is improved.

[0046] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An assisted flow-guided pressurized seed metering device, characterized in that, The utility model relates to a seed sowing device, including: A mounting shell includes a first shell and a second shell that are detachably connected, the first shell has an air inlet, a seed inlet and a seed outlet respectively, the first shell and the second shell enclose a mounting cavity, the mounting cavity includes a seed filling area, a seed conveying area, a seed cleaning area and a seed dropping area arranged in sequence, the seed filling area corresponds to the seed inlet, and the seed dropping area corresponds to the seed outlet; A seed dropping assembly includes a seed plate and a driving member arranged in the mounting cavity, the seed plate has a conical flow dividing part and a plurality of arc-shaped flow guide grooves arranged on the side of the conical flow dividing part, the conical flow dividing part corresponds to the air inlet and is used for dividing the airflow to each arc-shaped flow guide groove, the end of the arc-shaped flow guide groove is provided with a seed hole for adsorbing seeds; The driving member is used for driving the seed plate to rotate, so that the seeds on the seed holes pass through the seed filling area, the seed conveying area, the seed cleaning area and the seed dropping area in sequence; And, A seed cleaning and dropping assembly includes a seed scraping knife and a gas blocking member arranged in the mounting cavity, the seed scraping knife is arranged corresponding to the seed cleaning area and is used for scraping the seeds at both ends of the seed hole moving to the seed cleaning area, so that each seed hole adsorbs one seed, and the gas blocking member is arranged close to the seed outlet and is used for sequentially abutting with each seed hole moving to the seed dropping area, so that the seeds at each seed hole fall into the seed outlet; The conical flow dividing part includes a bottom plate and a plurality of flow dividing plates arranged on the bottom plate, two adjacent flow dividing plates form a flow dividing groove, one end of the flow dividing groove is communicated with the air inlet, and the other end is communicated with the arc-shaped flow guide groove; The groove width of each flow dividing groove is gradually increased from the air inlet to the flow guide groove; An air inlet pipe and an arc-shaped flow guide section are arranged on the outer wall of the first shell, the air inlet pipe is communicated with the air inlet, the inlet of the arc-shaped flow guide section is communicated with the air inlet pipe, a seed guide pipe is further arranged on the outer wall of the first shell, the seed guide pipe is communicated with the seed outlet, and the outlet of the arc-shaped flow guide section corresponds to the seed guide pipe.

2. The assisted flow-guided pressurized seed metering device according to claim 1, characterized in that, The driving member includes a driving shaft, and the driving shaft is arranged through the second shell and is drivingly connected with the seed plate.

3. The assisted flow-guided pressurized seed metering device according to claim 1, wherein, The seed scraping knife includes a first arc-shaped section and a second arc-shaped section arranged at intervals, the first arc-shaped section and the second arc-shaped section correspond to both ends of the seed hole respectively and are used for scraping the seeds at both ends of the seed hole, the curvature of the first arc-shaped section and the second arc-shaped section is matched with the curvature of the seed plate, and a seed guide channel is formed between the first arc-shaped section and the second arc-shaped section.

4. The assisted flow-guided pressurized seed metering device according to claim 3, characterized in that, The seed scraping knife further includes a mounting portion, the mounting portion includes a mounting plate and a mounting shaft arranged on one side of the mounting plate, the mounting plate is movably arranged on the inner wall of the first shell, so that the mounting position of the mounting plate in the first shell is adjustable, and the first arc-shaped section and the second arc-shaped section are movably connected with the mounting shaft, so that the distance between the first arc-shaped section and the second arc-shaped section and the seed hole is adjustable.

5. The assisted flow-guided pressurized seed metering device according to claim 1, wherein, The air resistance member comprises a first mounting rod and an air resistance wheel rotatably arranged at the end of the first mounting rod, and the wheel wall of the air resistance wheel is used for slidingly abutting against the side wall of the seed plate.

6. The assisted flow-guided pressurized seed metering device according to claim 1, wherein, The seed cleaning and throwing assembly further comprises a seed throwing member arranged below the air resistance member, the seed throwing member comprises a second mounting rod and a seed throwing wheel rotatably arranged at the end of the second mounting rod, the seed throwing wheel is arranged corresponding to the seed outlet, and a plurality of convex ribs are arranged on the wheel wall of the seed throwing wheel, each of the convex ribs is used for abutting against and cleaning the seeds left on the seed holes.

7. The assisted flow-guided pressurized seed metering device according to claim 1, wherein, The inner wall of the first shell further comprises a seed blocking plate, the seed blocking plate comprises a horizontal segment and an inclined segment connected in sequence, the horizontal segment is arranged at the seed outlet, a through hole is arranged on the horizontal segment and communicates with the seed outlet, and the end of the inclined segment away from the horizontal segment is arranged close to the seed inlet.

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