CN115380671B - Seed injection device and seeder - Google Patents
Seed injection device and seeder Download PDFInfo
- Publication number
- CN115380671B CN115380671B CN202211045710.7A CN202211045710A CN115380671B CN 115380671 B CN115380671 B CN 115380671B CN 202211045710 A CN202211045710 A CN 202211045710A CN 115380671 B CN115380671 B CN 115380671B
- Authority
- CN
- China
- Prior art keywords
- seed
- laval nozzle
- cavity
- electromagnetic pulse
- pulse valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002347 injection Methods 0.000 title claims abstract description 50
- 239000007924 injection Substances 0.000 title claims abstract description 50
- 230000001133 acceleration Effects 0.000 claims abstract description 6
- 230000008602 contraction Effects 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000009331 sowing Methods 0.000 abstract description 10
- 239000002689 soil Substances 0.000 description 7
- 238000010899 nucleation Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 241000234314 Zingiber Species 0.000 description 1
- 235000006886 Zingiber officinale Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 235000008397 ginger Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/18—Machines for depositing quantities of seed at intervals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/20—Parts of seeders for conducting and depositing seed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Sowing (AREA)
Abstract
The embodiment of the application provides a seed injection device and a seeder, wherein the seed injection device comprises a seed injection box, a proximity switch, an electromagnetic pulse valve, a Laval nozzle and a seed injection pipe, wherein a cavity and an inclined seed injection channel are arranged on the seed injection box, one end of the inclined seed injection channel is a seed dropping port, and the other end of the inclined seed injection channel is communicated with the cavity; the proximity switch is arranged at one side of the inclined seed feeding channel and used for detecting whether seeds pass through the inclined seed feeding channel; the electromagnetic pulse valve is connected with an air source, and when the proximity switch detects that seeds pass through the air source, the electromagnetic pulse valve is connected with the air source; the Laval nozzle is connected with the electromagnetic pulse valve and is used for accelerating air flow; the Laval nozzle is fixed on the seed feeding box and at the upper end of the cavity; the seed injection tube is fixed on the seed feeding box and at the lower end of the cavity, seeds fall into the seed injection tube through the inclined seed feeding channel, and acceleration and injection are completed under the action of acceleration air flow. The seed injection device has the advantages of simple and compact structure, high sowing efficiency, stability, reliability and the like, and can realize continuous sowing when being carried on a sowing machine.
Description
Technical Field
The invention relates to agricultural seeding equipment, in particular to a seed injection device and a seeding machine.
Background
When the drill seeding operation is performed on the wet soil (such as ginger black soil, paddy fields and the like), the problems of high cultivation resistance, easy clay of the ground contact parts and the like exist. CN101743797B discloses a pneumatic seed-shooting sowing device, which makes seeds shoot into soil with high pressure gas, so that a ditching device and a soil covering device of a traditional sowing machine are omitted, and the problems of adhesion of a ground-touching part and viscous wet soil and the like are solved. However, this patent solution still has the following problems: (1) The seed injecting action frequency is low, when the ventilation rod and the seed bag are separated, the seed sowing device is used for sowing seeds, and the seed bag receives seeds; when the ventilation rod and the seed bag are closed, the electromagnetic valve is communicated with compressed air, and seeds leave the seed bag; (2) The reliability is poor, the seed bag is made of elastic materials, and the ventilation rod frequently stretches into and extends out of the seed bag, so that the seed bag is contracted and expanded, and the problems of abrasion, air leakage and the like of the seed bag are easily caused; and (3) the whole structure of the device is slightly bulkier and more complex.
Disclosure of Invention
The invention aims to: the invention aims to provide a seed shooting device which has a simple and compact structure, high sowing efficiency, stability and reliability; the second object of the invention is to provide a seeding machine using the seed injection device.
The technical scheme is as follows: in one aspect, the present invention provides a seed shooting device, including:
the seed feeding box is provided with a cavity and an inclined seed feeding channel, one end of the inclined seed feeding channel is a seed falling port, and the other end of the inclined seed feeding channel is communicated with the cavity;
the proximity switch is arranged on one side of the inclined seed feeding channel and used for detecting whether seeds pass through the inclined seed feeding channel or not;
the electromagnetic pulse valve is connected with an air source, and when the proximity switch detects that seeds pass through the electromagnetic pulse valve, the electromagnetic pulse valve is connected with the air source;
the Laval nozzle is connected with the electromagnetic pulse valve and used for accelerating air flow; the Laval nozzle is fixed on the seed feeding box and at the upper end of the cavity;
the seed injection pipe is fixed on the seed feeding box and at the lower end of the cavity, seeds fall into the seed injection pipe through the inclined seed feeding channel, and acceleration and injection are completed under the action of acceleration airflow.
In the invention, the air flow can be fully accelerated through the Laval nozzle, so that the seed ejection speed is improved; the pulse blowing is realized through the proximity switch and the electromagnetic pulse valve, and the device has the advantages of stable air source pressure, convenient operation and control, reliable opening and closing and the like; the seeds are pulsed once when reaching the lower part of the Laval nozzle, and no other preparation actions are needed. The invention solves the problem of low seed injection action frequency, has simple and compact structure and higher stability and reliability.
Further, the air flow accelerated by the Laval nozzle forms a supersonic jet.
Further, the laval nozzle is coaxial with the seed injection tube.
Further, the Laval nozzle extends into the cavity, the upper end of the seed injection tube is a tapered horn mouth, the outlet end of the Laval nozzle is flush with the tapered starting end of the horn mouth, and a radial gap for seeds to pass through is reserved.
Further, the angle of the inclined seed feeding channel is consistent with the taper angle of the bell mouth.
Further, the air source is an air compressor.
Further, an air bag for adjusting the air flow pressure to be stable is arranged between the air compressor and the electromagnetic pulse valve. The stable air flow pressure is helpful for ensuring the consistent seed injection speed and the consistent seed injection depth into the soil. On the other hand, the air bag may store compressed air so that the air compressor may operate intermittently, rather than continuously.
Further, the electromagnetic pulse valve is connected with the air bag through a first connector and is connected with the Laval nozzle through a second connector.
Further, the Laval nozzle, the seed injection tube and the proximity switch are in threaded connection with the seed feeding box.
On the other hand, the invention also provides a seeder, and the seed injection device is mounted on the seeder. When the seeder moves in the field, the seed injection device carried on the seeder works to realize continuous seeding.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable advantages: simple and compact structure, high sowing efficiency, stability and reliability.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a partially disassembled schematic view of the structure of FIG. 2;
FIG. 4 is a schematic diagram of Mach number and pressure distribution within a Laval nozzle tube;
reference numerals: 1, air bag; 2, a first joint; 3, an electromagnetic pulse valve; 4, a second joint; 5, laval nozzle; 6, a seed feeding box; 7, a seed injection tube; 8, approaching a switch.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the seed injection device comprises an air bag 1, an electromagnetic pulse valve 3, a laval nozzle 5, a seed feeding box 6, a seed injection tube 7 and a proximity switch 8.
Wherein, be equipped with a plurality of interfaces on the air pocket 1, one of them interface connection air compressor machine, one interface is through connecting a 2 connection electromagnetic pulse valve 3, other interface connection manometer, relief valve, annex such as drain valve. Compressed air can be stored in the air bag 1.
The laval nozzle 5, i.e. the convergent-divergent nozzle, through which the compressed air is accelerated into a supersonic jet after passing through the laval nozzle 5. The electromagnetic pulse valve 3 and the Laval nozzle 5 are connected through a second joint 4.
The seed feeding box 6 is internally provided with a cavity and an inclined seed feeding channel, one end of the inclined seed feeding channel is a seed falling port, and the other end of the inclined seed feeding channel is communicated with the cavity. The proximity switch 8 is fixed at the rear side of the inclined seed feeding channel through screw thread screwing, is interlocked with the electromagnetic pulse valve 3 and is used for detecting whether seeds pass through the inclined seed feeding channel, and if the seeds are detected to pass through, the electromagnetic pulse valve 3 is opened. The Laval nozzle 5 is fixed on the seed feeding box 6 and the upper end of the cavity through screw thread screwing. The seed injection tube 7 is of a tapered straight tube structure, specifically, the upper end is a tapered bell mouth, and the lower end is a straight tube. The seed injection tube 7 is fixed on the seed feeding box 6 and at the lower end of the cavity through screw thread screwing, and the axis of the seed injection tube 7 is coincident with the axis of the Laval nozzle 5. In addition, the tapered beginning of the flare is flush with the outlet end of the laval nozzle 5, with a radial gap therebetween for the passage of seeds. The taper angle of the horn mouth is consistent with the opening angle of the inclined seed feeding channel. When seeds fall to the tapered bell mouth of the seed injection pipe 7 along the inclined seed injection channel, the electromagnetic pulse valve 3 is opened, the supersonic jet is sprayed out from the Laval nozzle 5, and the seeds are accelerated and sprayed out in the seed injection pipe 7.
As shown in FIG. 4, A 1 、A t 、A 2 The sectional areas of an inlet, a throat and an outlet of the Laval nozzle 5 are sequentially shown; p is p 1 、p cr 、p 2 The inlet pressure, the critical pressure and the outlet pressure of the Laval nozzle 5 are sequentially set; m is M 1 (<1)、1、M 2 (>1) The Mach numbers of the inlet, the throat and the outlet of the Laval nozzle 5 are sequentially arranged. For the Laval nozzle 5 to form a supersonic jet, the ambient pressure p at the outlet of the Laval nozzle 5 b Should be below the critical pressure p cr . In the constriction section of the laval nozzle 5, the air flow velocity increases with the decrease of the sectional area, and the local sound velocity (throat Mach number 1) is reached in the throat of the laval nozzle 5; the pressure decreases with increasing gas flow velocity, and decreases to the critical pressure p at the throat of the Laval nozzle 5 cr . In the expansion section of the laval nozzle 5, the gas expands further, the flow rate increases to supersonic speed and increases with increasing cross-sectional area; the pressure is the throat pressure p cr Down to the outlet pressure p 2 . To avoid over-or under-expansion of the gas in the expansion section, the outlet pressure p of the Laval nozzle 5 2 Should be equal to the ambient pressure p at the outlet b 。
The working principle of the present invention is described below.
After the seeds are put into the seed dropping port, the seeds slide downwards along the inclined seed dropping channel, and when the proximity switch 8 detects that the seeds pass through, the electromagnetic pulse valve 3 interlocked with the seeds is opened. When seeds fall to a convergent area at the upper part of the seed injection pipe 7, just ultrasonic jet flow is sprayed out from the Laval nozzle 5, the seeds are accelerated in the seed injection pipe 7 under the action of the ultrasonic jet flow, and the seeds with high speed are injected into soil to a proper depth, so that sowing operation is completed.
When the seed injection device is carried on the seeder and moves along with the seeder in the field, continuous seeding can be realized.
Claims (6)
1. A seed ejection device, comprising:
the seed feeding box is provided with a cavity and an inclined seed feeding channel, one end of the inclined seed feeding channel is a seed falling port, and the other end of the inclined seed feeding channel is communicated with the cavity;
the proximity switch is arranged on one side of the inclined seed feeding channel and used for detecting whether seeds pass through the inclined seed feeding channel or not;
the electromagnetic pulse valve is connected with an air source, and when the proximity switch detects that seeds pass through the electromagnetic pulse valve, the electromagnetic pulse valve is connected with the air source;
the Laval nozzle is connected with the electromagnetic pulse valve and used for accelerating air flow; the Laval nozzle is fixed on the seed feeding box and at the upper end of the cavity;
the seed injection pipe is fixed on the seed feeding box and at the lower end of the cavity, seeds fall into the seed injection pipe through the inclined seed feeding channel, and acceleration and injection are completed under the action of acceleration airflow;
the air flow accelerated by the Laval nozzle forms supersonic jet: in the contraction section of the Laval nozzle, the airflow speed increases along with the reduction of the sectional area, the local sound velocity is achieved at the throat part of the Laval nozzle, and the Mach number at the throat part is 1; in the expansion section of the Laval nozzle, the gas is further expanded, the flow speed is increased to supersonic speed, and the flow speed is increased along with the increase of the sectional area;
the Laval nozzle is coaxial with the seed injection tube;
the Laval nozzle extends into the cavity, the upper end of the seed injection tube is a tapered horn mouth, the outlet end of the Laval nozzle is flush with the tapered starting end of the horn mouth, and a radial gap for seeds to pass through is reserved;
the angle of the inclined seed feeding channel is consistent with the taper angle of the bell mouth.
2. The seed injection device of claim 1, wherein the air source is an air compressor.
3. The seed injection device according to claim 2, wherein an air bag for adjusting air flow pressure stabilization is provided between the air compressor and the electromagnetic pulse valve.
4. A seed injection device according to claim 3, wherein the solenoid valve is connected to the air bag via a first connector and to the laval nozzle via a second connector.
5. The seed injection device of claim 1, wherein the laval nozzle, the seed injection tube, and the proximity switch are threadably coupled to the seed feed box.
6. A seed drill, wherein the seed injection device according to any one of claims 1 to 5 is mounted on the seed drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211045710.7A CN115380671B (en) | 2022-08-30 | 2022-08-30 | Seed injection device and seeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211045710.7A CN115380671B (en) | 2022-08-30 | 2022-08-30 | Seed injection device and seeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115380671A CN115380671A (en) | 2022-11-25 |
| CN115380671B true CN115380671B (en) | 2023-12-26 |
Family
ID=84123512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211045710.7A Active CN115380671B (en) | 2022-08-30 | 2022-08-30 | Seed injection device and seeder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115380671B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5524559A (en) * | 1991-03-25 | 1996-06-11 | Maxwell Davidson Limited | Method and apparatus for sowing seed |
| CN101743797A (en) * | 2010-01-08 | 2010-06-23 | 山东理工大学 | Pneumatic seed shooting and seeding device |
| CN105103732A (en) * | 2015-09-15 | 2015-12-02 | 冯成伟 | Pneumatic precise seeder |
| CN207981513U (en) * | 2018-01-29 | 2018-10-19 | 东莞市友恺通信技术有限公司 | A kind of intelligent-induction blowning installation |
| CN109475081A (en) * | 2016-07-13 | 2019-03-15 | 艾姆瓦克公司 | Utilize the system of product for agriculture of the seed transport mechanism electroosmotic pulse discharge with seed |
| CN210671281U (en) * | 2019-05-08 | 2020-06-05 | 无锡职业技术学院 | Pneumatic seeder |
| CN216058214U (en) * | 2021-09-13 | 2022-03-18 | 七海行(深圳)科技有限公司 | Precision seeding equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7475831B2 (en) * | 2004-01-23 | 2009-01-13 | Delphi Technologies, Inc. | Modified high efficiency kinetic spray nozzle |
| CA2619405C (en) * | 2005-08-19 | 2011-08-02 | Kajima Corporation | Method of spray application, and spray apparatus, for bentonite material |
-
2022
- 2022-08-30 CN CN202211045710.7A patent/CN115380671B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5524559A (en) * | 1991-03-25 | 1996-06-11 | Maxwell Davidson Limited | Method and apparatus for sowing seed |
| CN101743797A (en) * | 2010-01-08 | 2010-06-23 | 山东理工大学 | Pneumatic seed shooting and seeding device |
| CN105103732A (en) * | 2015-09-15 | 2015-12-02 | 冯成伟 | Pneumatic precise seeder |
| CN109475081A (en) * | 2016-07-13 | 2019-03-15 | 艾姆瓦克公司 | Utilize the system of product for agriculture of the seed transport mechanism electroosmotic pulse discharge with seed |
| CN207981513U (en) * | 2018-01-29 | 2018-10-19 | 东莞市友恺通信技术有限公司 | A kind of intelligent-induction blowning installation |
| CN210671281U (en) * | 2019-05-08 | 2020-06-05 | 无锡职业技术学院 | Pneumatic seeder |
| CN216058214U (en) * | 2021-09-13 | 2022-03-18 | 七海行(深圳)科技有限公司 | Precision seeding equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115380671A (en) | 2022-11-25 |
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