WO2014173261A1 - 气力式播种排种系统 - Google Patents

气力式播种排种系统 Download PDF

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Publication number
WO2014173261A1
WO2014173261A1 PCT/CN2014/075756 CN2014075756W WO2014173261A1 WO 2014173261 A1 WO2014173261 A1 WO 2014173261A1 CN 2014075756 W CN2014075756 W CN 2014075756W WO 2014173261 A1 WO2014173261 A1 WO 2014173261A1
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WIPO (PCT)
Prior art keywords
seeding
seed
hole
suction
drum
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PCT/CN2014/075756
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English (en)
French (fr)
Inventor
刘宝才
Original Assignee
Liu Baocai
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Publication of WO2014173261A1 publication Critical patent/WO2014173261A1/zh

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/04—Single-grain seeders with or without suction devices
    • A01C7/042—Single-grain seeders with or without suction devices using pneumatic means
    • A01C7/044—Pneumatic seed wheels

Definitions

  • the present invention belongs to the technical field of agricultural seeding machinery, and more particularly to a pneumatic seeding seeding system.
  • Precision seeding system is the most important component in modern agricultural sowing machines and seedling raising machines.
  • the sowing drums mostly use flat-tube suction holes, which can easily cause one hole to absorb multiple seeds.
  • the suction head is used because the suction head is higher than the seeding. There is a gap between the rollers and the suction head. The seeding roller is rotated. The suction head is easy to produce the seed in the seed box. The distance between the seeds is small and the weight falls. It is easy to produce seed replay or missed broadcast. Or scraping, especially for small and irregular seeds, it is difficult to achieve single seeding, and precise seeding of two, three, and multiple grains per hole.
  • the object of the present invention is to overcome the shortcomings and deficiencies of the prior art, and to provide a pneumatic seeding seeding system with simple structural design and high seeding performance.
  • the pneumatic seeding and seeding system comprises: an inhalation air blowing pipe connected to the fixing frame, a cleaning device, a shunting accelerator, and a seeding roller capable of rotating around the inhalation air blowing pipe on the inhalation blowing pipe;
  • the speed motor, the seed box has a semi-circular shape on the side of the seeding drum and the seeding drum, and the seeding conduit is connected to the shunting accelerator.
  • the suction pipe on the suction air pipe is provided with a pipe partition between the air blowing pipe, the air suction pipe is provided with an air suction hole, and the air blowing pipe is provided with a blowing hole, and the air blowing hole is sucked on one side of the air blowing pipe.
  • a strip blowing port is provided on the air blowing pipe.
  • the strip blowing port is opposite to the seed splitting hole of the splitting accelerator, and the four sides of the strip blowing port are matched with the inner wall of the seeding drum.
  • the outer wall of the seeding drum has a wave shape, and a plurality of seeding drum suction holes communicating with the inner cavity are evenly distributed on the annular protrusion of the seeding drum.
  • the two ends of the seeding drum are connected to the suction blow pipe through a bearing and a speed control motor.
  • the cleaning device is a tubular body, and an airflow regulating valve and a clearing blowing hole are arranged on the seeding adjusting device, and the seed blowing hole corresponds to the annular protrusion of the seeding drum.
  • the shunt accelerator has a seed diversion hole corresponding to the annular protrusion of the seeding drum, and a shunting acceleration blowing hole corresponding to the seed diversion hole is arranged on the diverting accelerator lumen, and the seed diversion hole is provided. It communicates with the split accelerating blowhole.
  • the seed conduit is connected to the common orifice of the split accelerator and the common outlet of the split accelerating blowhole.
  • the suction pipe of the suction blow pipe in the seeding drum is connected with the suction fan to make a strip shape on the suction blow pipe
  • a negative pressure zone is formed on the outside of the blow port to cause suction of the seeding drum suction hole in the negative pressure zone of the seeding drum.
  • the blowing pipe of the suction blowing pipe in the seeding drum is connected with the blower to form a positive pressure zone inside the strip blowing port on the suction blowing pipe, so that the suction hole of the seeding drum in the positive pressure zone of the seeding drum generates a blowing force.
  • the seeding drum is driven to rotate around the suction blowing pipe by the speed regulating motor.
  • the suction hole of the seeding drum passes from the negative pressure zone to the positive pressure zone, and then rotates from the positive pressure zone to the negative pressure zone to realize adsorption of the seed in the negative pressure zone. Arrange the work in the positive pressure zone.
  • the cleaning device is connected with the blower, so that the airflow blown by the clear blow hole generates a blowing force on the annular protrusion of the seeding drum, and the strength of the blowing force of the clearing blowhole is adjusted by the airflow adjusting valve, and the outer wall of the seeding drum is reduced in waveform
  • the adsorption area of the suction hole of the seeding drum is filtered, and the seed which is not strongly adsorbed on the suction hole of the seeding drum is blown off by the blowing force of the seeding blower, so that only one seed is adsorbed on the suction hole of each seeding drum.
  • the seeds are poured by rotating the seed box to block the suction holes of the seeding drum, so that the seeding drum suction holes do not adsorb the seeds to adjust the number of seeding rows.
  • the strip-shaped blowing port on the suction blow pipe is opposite to the splitting accelerator seed diverting hole, and the seed adsorbed by the seeding drum suction hole is blown into the shunt accelerator by the positive pressure airflow in the strip-shaped blowing port through the suction hole of the seeding drum In the split hole.
  • the shunt accelerator is connected to the blower to generate a blowing force by the airflow blown by the splitting accelerating blow hole, and the seed in the seed splitting hole is accelerated by the shunting airflow blown by the blowing hole, and the seed is discharged to the designated position through the airflow in the seeding duct. .
  • the seeding hole distance is adjusted by adjusting the rotation speed of the speed control motor to change the seeding drum speed.
  • the seeding moment is adjusted by varying the spacing of the outlet ends of the seeding conduits.
  • the number of seeded cells is determined by varying the number of suction holes per set of seeding drums.
  • the pneumatic seeding seeding system comprises: an inhalation air blowing pipe and a cleaning device are connected and fixed on the fixing frame, and a seeding drum and a speed regulating motor capable of rotating around the inhalation air blowing pipe are arranged on the inhalation air blowing pipe.
  • the seed box has a semi-circular shape on the side of the seeding drum and the seeding drum.
  • the suction pipe on the suction air pipe is provided with a pipe partition between the air blowing pipe, the air suction pipe is provided with an air suction hole, and the air blowing pipe is provided with a blowing hole, and the air blowing hole is sucked on one side of the air blowing pipe.
  • a strip blowing port is provided on the air blowing pipe.
  • the outer wall of the seeding drum has a wave shape, and a plurality of seeding drum suction holes communicating with the inner cavity are uniformly distributed on the annular protrusion of the seeding drum.
  • Both ends of the seeding drum and the suction blow pipe are connected by a bearing and a speed control motor.
  • the cleaning device is a tubular body, and the freshening adjusting device is provided with an air flow regulating valve and a clear blowing hole, and the cleaning blowing hole corresponds to the annular protrusion of the seeding drum.
  • the seed box has a semi-enclosed shape with the seeding drum at the side of the negative pressure zone on the side of the seeding drum.
  • the suction pipe of the suction blow pipe in the seeding drum is connected with the suction fan to form a negative pressure zone outside the strip blow port on the suction blow pipe, so that the suction drum suction hole of the negative pressure zone of the seeding drum generates suction. .
  • the blowing pipe of the suction blowing pipe in the seeding drum is connected with the blower to form a positive pressure zone inside the strip blowing port on the suction blowing pipe, so that the suction hole of the seeding drum in the positive pressure zone of the seeding drum generates a blowing force.
  • the seeding drum is driven to rotate around the suction blowing pipe by the speed regulating motor, the suction hole of the seeding drum is from the negative pressure zone to the positive pressure zone, and then the cycle is rotated from the positive pressure zone to the negative pressure zone to realize adsorption of the seed in the negative pressure zone. Arrange the work in the positive pressure zone.
  • the seeding hole distance is adjusted by adjusting the rotation speed of the speed control motor to change the seeding drum speed.
  • the cleaning device is connected to the blower, and the airflow blown by the clear blow hole is produced by the annular projection of the seeding drum
  • the blowing force is used to adjust the strength of the blowing force of the cleaning blow hole through the air flow adjusting valve.
  • the waveform of the outer wall of the seeding roller reduces the suction area of the suction hole of the seeding drum, and the suction force of the seeding roller is not absorbed by the blowing force of the seeding blow hole. Strong seeds are blown off so that only one seed is absorbed on the suction hole of each seeding drum.
  • the number of seeded cells was determined by varying the number of suction holes per set of seeding drums.
  • the pneumatic seeding seeding system has the advantages of: reasonable structural design, stable and reliable working performance, and adopting a pneumatic cleaning facility to avoid injuring the seeds, so that the suction holes of each seeding drum are only adsorbed.
  • a seed the seeds fall evenly and accelerated by the splitting accelerator, reduce the replay, the leakage phenomenon, can easily adjust the number of seeding rows, planting row spacing, sowing plant spacing, to achieve a multi-line operation, single-grain, double-grain, multi-grain sowing.
  • FIG. 1 is a side cross-sectional view showing the structure of a pneumatic seeding seeding system.
  • FIG. 2 is a front cross-sectional view showing the structure of a pneumatic seeding seeding system.
  • FIG. 3 is a schematic diagram of a multi-row seeding of a pneumatic seeding seeding system.
  • the seeding drum 5 is rotated around the suction blow pipe 2 under the driving of the speed regulating motor 6, so that the seeding drum suction hole 52 is rotated from the bottom to the top in the seed box 7.
  • the suction hole 23 of the suction pipe 21 is formed to form a negative pressure zone outside the strip-shaped air blowing port 26, so that the seeding drum suction hole 52 of the negative pressure zone of the seeding drum 5 generates suction force, and the seeding drum suction hole 52 Seeds are adsorbed in the seed box 7.
  • the adsorbed seed is rotated by the seeding drum 5 to the corresponding position of the seed split hole 41 of the flow dividing accelerator 4, and the seed is passed through the seeding drum suction hole by the positive positive air flow of the strip blowing port 26 on the suction blow pipe 2. 52 is blown into the seed split hole 41 of the splitter accelerator 4.
  • the seed in the seed split hole 41 of the splitter accelerator 4 is accelerated by the flow of the blown air blow hole 42 and the seed is discharged to the designated position by the air flow in the seed conduit 8.
  • the seeds are poured by rotating the seed box 7, and the seeding drum suction holes 52 are shielded so that the seeding drum suction holes 52 do not adsorb the seeds to adjust the number of seeding rows.
  • the seeding row spacing is adjusted by changing the spacing of the outlet ends of the seeding conduits 8.
  • the seeding pitch is adjusted by adjusting the rotation speed of the speed adjusting motor 6 to change the rotation speed of the seeding drum 5.
  • the number of seeded cells is determined by changing the number of suction holes per set of the seeding drum 5. [0055] Case 2
  • the seeding drum 5 is rotated around the suction blow pipe 2 under the driving of the speed regulating motor 6, so that the seeding drum suction hole 52 is rotated from the bottom to the top in the seed box 7.
  • the suction hole 23 of the suction pipe 21 is formed to form a negative pressure zone outside the strip-shaped air blowing port 26, so that the seeding drum suction hole 52 of the negative pressure zone of the seeding drum 5 generates suction force, and the seeding drum suction hole 52 Seeds are adsorbed in the seed box 7.
  • the speed of the speed regulating motor 6 is adjusted so that each set of suction holes on the seeding drum corresponds to the hole of the breeding tray so that each hole receives the same number of seeds.
  • the number of seeded cells is determined by changing the number of suction holes per set of the seeding drum 5.

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Sowing (AREA)

Abstract

一种气力式播种排种系统，播种滚筒（5）通过调速马达（6）带动围绕吸气吹气管（2）转动，播种滚筒吸孔（52）通过吸气管（21）产生负压，在种子箱（7）内吸附种子，经过播种滚筒环形凸起（51）对应的清种装置（3）上的清种吹气孔（32）吹除多余种子，被吸附的种子通过吹气管（22）吹落进分流加速器（4）的种子分流孔（41）中，被分流加速器（4）中吹出的气流加速，经过排种导管（8）排到指定位置，采用气力清种装置（3），避免刻伤种子，播种滚筒（5）外壁呈波形，使每个播种滚筒吸孔（52）只吸附一粒种子，种子下落均匀又被分流加速器（4）加速，减少重播，漏播现象，能够方便地调整播种行数，播种行距，播种株距，实现一机多行作业，通过改变每组播种滚筒吸孔数量，使穴播两粒、三粒、多粒播种。

Description

气力式播种排种系统 技术领域
[0001]本发明属于农业播种机械技术领域， 特别涉及一种采用气力式播种排种系 统。
背景技术
[0002]精准播种系统是现代农业播种机械和育苗机械中最为关键的构件， 播种滚 筒多采用平筒吸孔， 极易造成一孔吸附多粒种子现象， 采用吸头， 因吸头高于播 种滚筒， 吸头之间有间隙， 转动播种滚筒， 吸头在种子箱内极易产生刻坏种子现 象， 种间距离小靠自重下落， 很容易产生种子重播或漏播， 清种多采用滚刷或刮 剥方式， 尤其对小粒及不规则种子难以做到单粒排种， 以及每穴两粒、 三粒、多 粒的精确播种。
技术问题
[0003]本发明的目的在于克服现有技术的缺点与不足， 提供一种结构设计简单合 理， 播种性能高的气力式播种排种系统。
技术解决方案
[0004]技术解决方案 1 :
[0005]气力式播种排种系统包括：在固定架上连接固定有吸气吹气管、清种装置、 分流加速器，在吸气吹气管上套有能围绕吸气吹气管转动的播种滚筒、调速马达， 种子箱在播种滚筒的侧方与播种滚筒呈半包围形状， 分流加速器上连接排种导 管。
[0006]所述的吸气吹气管上的吸气管与吹气管中间设有管隔， 在吸气管上设有吸 气孔， 在吹气管上设有吹气孔， 在吹气孔一侧吸气吹气管上设有条形吹气口。
[0007]所述的条形吹气口对着分流加速器的种子分流孔， 条形吹气口的四边与播 种滚筒内壁相吻合。
[0008]上述的播种滚筒外壁呈波形， 在播种滚筒的环形凸起上均匀分布若干个与 内腔相通的播种滚筒吸孔。
[0009]播种滚筒的两端与吸气吹气管之间通过轴承、 调速马达连接。
[0010]所述的清种装置为管状体， 在清种调节装置上设有气流调节阀、 清种吹气 孔， 清种吹气孔与播种滚筒环形凸起相对应。
[0011]所述的分流加速器的管腔外设有与播种滚筒环形凸起相对应的种子分流 孔，在分流加速器管腔上设有与种子分流孔相对应的分流加速吹气孔， 种子分流 孔与分流加速吹气孔相通。
[0012]在分流加速器的种子分流孔与分流加速吹气孔的共同出孔上连接排种导 管。
[0013]种子箱在播种滚筒的侧方的负压区位置与播种滚筒呈半包围形状， 种子箱 安装在清种装置与分流加速器的连接隔板上， 与播种滚筒环形凸起相对应，种子 箱在连接隔板上以连接点为轴向上转动。
[0014]方案 1的工作原理。
[0015]在播种滚筒内吸气吹气管的吸气管与吸风机连接， 使吸气吹气管上的条形 吹气口外侧形成负压区， 使播种滚筒负压区的播种滚筒吸孔产生吸力。
[0016]在播种滚筒内吸气吹气管的吹气管与吹风机连接， 使吸气吹气管上的条形 吹气口内侧形成正压区， 使播种滚筒正压区的播种滚筒吸孔产生吹力。
[0017]播种滚筒通过调速马达带动围绕吸气吹气管转动， 播种滚筒吸孔由负压区 到正压区， 再由正压区到负压区循环转动， 实现在负压区吸附种子， 在正压区排 种作业。
[0018]清种装置与吹风机连接， 使清种吹气孔吹出的气流对播种滚筒环形凸起产 生吹力，通过气流调节阀调整清种吹气孔的吹力的强弱， 播种滚筒外壁呈波形减 少了播种滚筒吸孔吸附面积，通过清种吹气孔的吹力， 播种滚筒吸孔上吸附不强 的种子被吹落， 使每个播种滚筒吸孔上只吸附一粒种子。
[0019]通过转动种子箱倒出种子， 遮挡播种滚筒吸孔， 使播种滚筒吸孔不吸附种 子来调整播种行数。
[0020]吸气吹气管上的条形吹气口对着分流加速器种子分流孔， 播种滚筒吸孔吸 附的种子被条形吹气口内的正压气流通过播种滚筒吸孔吹进分流加速器上的种 子分流孔中。
[0021]分流加速器与吹风机连接， 使分流加速吹气孔吹出的气流产生吹力， 种子 分流孔中的种子被分流加速吹气孔吹出的气流加速，种子通过排种导管内的气流 排送到指定位置。
[0022]通过调节调速马达的转速改变播种滚筒转速来调整播种穴距。
[0023]通过改变排种导管出口端的间距来调整播种行矩。
[0024]通过改变播种滚筒每组吸孔数量来确定穴播粒数。
[0025]技术解决方案 2:
[0026]气力式播种排种系统包括：在固定架上连接固定有吸气吹气管、清种装置，， 在吸气吹气管上套有能围绕吸气吹气管转动的播种滚筒、调速马达， 种子箱在播 种滚筒的侧方与播种滚筒呈半包围形状。
[0027]所述的吸气吹气管上的吸气管与吹气管中间设有管隔， 在吸气管上设有吸 气孔， 在吹气管上设有吹气孔， 在吹气孔一侧吸气吹气管上设有条形吹气口。
[0028]所述的条形吹气口的四边与播种滚筒内壁相吻合。
[0029]上述的播种滚筒外壁呈波形， 在播种滚筒的环形凸起上均匀分布若干个与 内腔相通的播种滚筒吸孔。
[0030]播种滚筒的两端与吸气吹气管之间通过轴承、 调速马达连接。
[0031]所述的清种装置为管状体， 在清种调节装置上设有气流调节阀、 清种吹气 孔， 清种吹气孔与播种滚筒环形凸起相对应。
[0032]种子箱在播种滚筒的侧方的负压区位置与播种滚筒呈半包围形状。
[0033]方案 2的工作原理。
[0034]在播种滚筒内吸气吹气管的吸气管与吸风机连接， 使吸气吹气管上的条形 吹气口外侧形成负压区， 使播种滚筒负压区的播种滚筒吸孔产生吸力。
[0035]在播种滚筒内吸气吹气管的吹气管与吹风机连接， 使吸气吹气管上的条形 吹气口内侧形成正压区， 使播种滚筒正压区的播种滚筒吸孔产生吹力。
[0036]播种滚筒通过调速马达带动围绕吸气吹气管转动， 播种滚筒吸孔由负压区 到正压区， 再由正压区到负压区循环转动， 实现在负压区吸附种子， 在正压区排 种作业。
[0037]通过调节调速马达的转速改变播种滚筒转速来调整播种穴距。
[0038]清种装置与吹风机连接， 使清种吹气孔吹出的气流对播种滚筒环形凸起产 生吹力，通过气流调节阀调整清种吹气孔的吹力的强弱， 播种滚筒外壁呈波形减 少了播种滚筒吸孔吸附面积，通过清种吹气孔的吹力， 播种滚筒吸孔上吸附不强 的种子被吹落， 使每个播种滚筒吸孔上只吸附一粒种子。
[0039]通过改变播种滚筒每组吸孔数量来确定穴播粒数。
有益效果
[0040]与现有技术相比， 本气力式播种排种系统的优点在于： 结构设计合理， 工 作性能稳定可靠， 采用气力清种设施， 避免刻伤种子， 使每个播种滚筒吸孔只吸 附一粒种子， 种子下落均匀又被分流加速器加速， 减少重播， 漏播现象， 能够方 便地调整播种行数， 播种行距， 播种株距， 实现一机多行作业， 穴播单粒、 双 粒、 多粒播种。
附图说明
[0041]图 1为气力式播种排种系统结构侧剖面图。
[0042]图 2为气力式播种排种系统结构正剖面图。
[0043]图 3为气力式播种排种系统穴播多粒排种示意图。
[0044]如图 1、 图 2、 图 3所示， 固定架 1、 吸气吹气管 2、 吸气管 21、 吹气管 22、 吸气孔 23、 吹气孔 24、 管隔 25、 条形吹气口 26、 清种装置 3、 气流调节阀 31、 清种吹气孔 32、 分流加速器 4、 种子分流孔 41、 分流加速吹气孔 42、 播种 滚筒 5、 播种滚筒环形凸起 51、 播种滚筒吸孔 52、 调速马达 6、 种子箱 7、 排种 导管 8、 连接隔板 9、 轴承 10。
具体实施方式
[0045]案例 1
[0046]如图 1、 图 2所示， 播种滚筒 5在调速马达 6的带动下， 围绕吸气吹气管 2转动， 使播种滚筒吸孔 52在种子箱 7内由下向上转动。
[0047]在播种滚筒 5内通过吸气管 21的吸气孔 23使得条形吹气口 26外侧形成 负压区， 使播种滚筒 5负压区的播种滚筒吸孔 52产生吸力， 播种滚筒吸孔 52 在种子箱 7内吸附种子。
[0048]被吸附的种子随着播种滚筒 5转动到清种装置 3上的清种吹气孔 32对应 位置时， 清种装置内的气流通过清种吹气孔 32对播种滚筒产生吹力， 使每个播 种滚筒吸孔 52只吸附一粒种子， 播种滚筒 5上多余的种子被气流吹落回种子箱 7内。
[0049]被吸附的种子随着播种滚筒 5转动到分流加速器 4的种子分流孔 41对应 位置时， 种子被吸气吹气管 2上的条形吹气口 26的内正压气流通过播种滚筒吸 孔 52吹进分流加速器 4的种子分流孔 41中。
[0050]在分流加速器 4的种子分流孔 41中的种子被分流加速吹气孔 42吹出的气 流加速， 种子通过排种导管 8内的气流排送到指定位置。
[0051]通过转动种子箱 7倒出种子， 遮挡播种滚筒吸孔 52， 使播种滚筒吸孔 52 不吸附种子来调整播种行数。
[0052]通过改变排种导管 8出口端的间距来调整播种行距。
[0053]通过调节调速马达 6的转速改变播种滚筒 5转速来调整播种株距。
[0054]通过改变播种滚筒 5每组吸孔数量来确定穴播粒数。 [0055]案例 2
[0056]图 2、 如图 3所示， 播种滚筒 5在调速马达 6的带动下， 围绕吸气吹气管 2转动， 使播种滚筒吸孔 52在种子箱 7内由下向上转动。
[0057]在播种滚筒 5内通过吸气管 21的吸气孔 23使得条形吹气口 26外侧形成 负压区， 使播种滚筒 5负压区的播种滚筒吸孔 52产生吸力， 播种滚筒吸孔 52 在种子箱 7内吸附种子。
[0058]被吸附的种子随着播种滚筒 5转动到清种装置 3上的清种吹气孔 32对应 位置时， 清种装置内的气流通过清种吹气孔 32对播种滚筒产生吹力， 使每个播 种滚筒吸孔 52只吸附一粒种子， 播种滚筒 5上多余的种子被气流吹落回种子箱 7内。
[0059]调整调速马达 6的转速， 使播种滚筒上的每组吸孔与育种盘孔穴相对应， 使每个孔穴得到相同数量的种子。
[0060]通过改变播种滚筒 5每组吸孔数量来确定穴播粒数。

Claims

权利要求书
1. 一种气力式播种排种系统，其特征在于，在固定架上连接固定有吸气吹气管、 清种装置、 分流加速器， 在吸气吹气管上套有播种滚筒、 调速马达， 种子箱在播 种滚筒的侧方， 与播种滚筒呈半包围形状， 分流加速器上连接排种导管。
2. 根据权利要求 1所述的气力式播种排种系统， 其特征在于， 所述的吸气吹气 管上的吸气管与吹气管中间设有管隔， 在吸气管上设有吸气孔， 在吹气管上设有 吹气孔， 在吹气孔一侧的吸气吹气管上设有条形吹气口。
3. 根据权利要求 2所述的气力式播种排种系统， 其特征在于， 所述的条形吹气 口对着分流加速器上的种子分流孔， 条形吹气口的四边与播种滚筒内壁相吻合。
4. 根据权利要求 1所述的气力式播种排种系统， 其特征在于， 所述的播种滚筒 外壁呈波型， 在播种滚筒环形凸起上均匀分布若干个与内腔相通的播种滚筒吸 孔。
5. 根据权利要求 1所述的气力式播种排种系统， 其特征在于， 所述的清种装置 上设有调节阀、 清种吹气孔， 清种吹气孔与播种滚筒环形凸起相对。
6. 根据权利要求 1所述的气力式播种排种系统， 其特征在于， 所述的分流加速 器上设有与播种滚筒环形凸起相对应的种子分流孔、分流加速吹气孔， 种子分流 孔与分流加速吹气孔相通。
7. 根据权利要求 1所述的气力式播种排种系统， 其特征在于， 所述的种子箱安 装在清种装置与分流加速器的连接隔板上， 种子箱与播种滚筒环形凸起相对应。
8. 根据权利要求 4所述的气力式播种排种系统， 其特征在于， 所述的播种滚筒 与吸气吹气管之间通过轴承、 调速马达连接。
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