CN110089242A - Air-suction type seed metering element, seed metering device and seed metering device - Google Patents
Air-suction type seed metering element, seed metering device and seed metering device Download PDFInfo
- Publication number
- CN110089242A CN110089242A CN201811159761.6A CN201811159761A CN110089242A CN 110089242 A CN110089242 A CN 110089242A CN 201811159761 A CN201811159761 A CN 201811159761A CN 110089242 A CN110089242 A CN 110089242A
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- tubular portion
- seed
- aspirated
- air
- circumferential weld
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- 238000010899 nucleation Methods 0.000 claims description 44
- 238000004140 cleaning Methods 0.000 claims description 6
- 210000001624 hip Anatomy 0.000 claims description 3
- 230000012447 hatching Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract 1
- 235000013339 cereals Nutrition 0.000 description 27
- 241000196324 Embryophyta Species 0.000 description 12
- 241000209140 Triticum Species 0.000 description 8
- 235000021307 Triticum Nutrition 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000009331 sowing Methods 0.000 description 2
- 241000486406 Trachea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/20—Parts of seeders for conducting and depositing seed
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Sowing (AREA)
- Pretreatment Of Seeds And Plants (AREA)
Abstract
The invention discloses an air-suction type seed metering element, a seed metering device and a seed metering device. The element can better overcome the defect that the common circular seam and the groove-type circular seam absorb redundant seeds during seed absorption, so that the seed absorption is more uniform, and the probability of the phenomenon that the redundant seeds are absorbed due to overlarge negative pressure can be reduced. The air-suction type seed discharging device is formed by connecting the components, has higher seed discharging uniformity than a seed discharging device with a common circular seam or a slot opening, and can still maintain high-level uniform seed discharging when negative pressure generated by a tractor fan is larger.
Description
Technical field
The present invention relates to seeding elements and device, and in particular to a kind of aspirated-air type seeding element, feed mechanism for seed and dispenser.
Background technique
Dispenser is the important component of seeder, is generally cooperated by plants case and feed mechanism for seed and realizes seeding function
Energy.It is in such a way that discharge gas generates negative pressure now for the air-suction seeding unit that the granules crop such as wheat is widely used
Seed is sucked and is discharged from plants case, is then scraped in grain conductor.Originally, air-suction seeding unit is used to inhale the crucial portion of kind
Position is that stomata is arranged on round tube, and seed is sucked by stomata, but the pressure of bellows driven by tractor is uneven and gas
The limitation of pore structure self reason, not only seed is easy to be scattered during seeding, but also stomata is also easy to be blocked, and causes seeding
Unevenly, discontinuously.Later, kind of position will be inhaled to be modified to surround the circle seam of round tube, draws seed from plants case using circle seam, this
The easily stifled drawback of stomata effectively is overcome, keeps seed discharging operation more continuous.As patent of invention CN101669417 B discloses one
Kind of circular tube clearance type breath dispenser on inner pipe by outer tube sleeve, between adjacent outer tube forms round gap, when gap is from kind
When the open outside of case passes through, and seed can be sucked, and gap is not easy to be blocked.Inventor is also discussed in detail with paper
The field performance that uses.(referring to Zhang Jinguo etc. " design of novel clearance type wheat air-suction seed metering device ", it is loaded in that " chemurgy is ground
Study carefully " in April, 2010, the 4th phase, page 69 ~ 71；Zhao Xiaoshun etc. " round tube straight-line joint type wheat air-suction seed metering device performance is experimental study ",
It is loaded in " Jouranl of Agricultural University of Hebei " in January, 2013, the 1st phase of volume 36, page 105 ~ 108) still, this structure is due to gap two
While be the outer wall of outer tube, and the outer wall of two sides outer tube and gap are located in same barrel surface, when circle stitches and draws seed, in addition to
Inhaling at gap has seed, can also adsorb several seeds often on the outer tube wall of gap two sides and be affixed with the seed on gap
Tightly, the supporting role due to these seeds by outer tube wall can be rotated together with outer tube wall, to the last be scraped together
It falls in grain conductor, causes multicast, not only seed is caused to waste in this way, can also occur more Miao Zhengshui at later stages and strive showing for fertilizer
As influencing wheat tillering, making to plant quality and yield is undesirable.
To solve the above-mentioned problems, occur that the way of groove, such as application for a patent for invention is arranged in round gap two sides
CN103843499A discloses a kind of disk aspirated-air type dispenser, forms circular seams by two disk spacing being oppositely arranged
Gap, and inner round side production chamfering and flange outside disk, are consequently formed the groove of circle seam two sides, have injuring-free seed, promote seeding
Uniformity beneficial effect.Patent of invention CN104285560B discloses a kind of suction type precision seeder, inhales kind of a position
It is to form U-shaped groove between two disks, for storing the seed being adsorbed, is conducive to be promoted the uniformity of seeding, continuous
Property, and injuring-free seed.Also, this suction kind structure is also applicable in the application for a patent for invention about air-suction type accurate sower
In CN107155458A.In addition, inventor also passes through paper, to have inquired into V-arrangement, inverted trapezoidal, arc-shaped, straight trough shape etc. in detail various
Situations such as distribution in the seed-metering performance of slot type structure or the air-flow pressure field of force, optimize the parameters of groove.(referring to Chen Fengyan etc.
" design and research of plane-of-weakness joint type wheat aspiration precision drill ", is loaded in " chemurgy research " in August, 2011, the 8th phase, and 81 ~ 84
Page；Zhao Xiaoshun etc. " line of rabbet joint aspirated-air type Wheat Precision Metering Device " is loaded in " agricultural mechanical journal " 2 months 2013, volume 44 the 2nd
Phase, page 48 ~ 51；Zhao Xiaoshun etc. " suction type Wheat Precision Metering Device parameter optimization and test "), it is loaded in " Journal of Agricultural Engineering "
In June, 2017, the o. 11th of volume 33, page 11 ~ 18) plane-of-weakness joint type inhales kind of position for common circle seam, reduce suction
The adhesion degree of the kind grain of gap two sides, effectively improves the uniformity of seeding when kind, and will not equally generate gap blocking
The case where.But as photo (paper attached drawing in above-mentioned " suction type Wheat Precision Metering Device parameter optimization and test " paper
9) illustrated in, above the kind grain that is adsorbed in slot or avris, one two extra kind grains can also be adsorbed again sometimes, from
And the space for promoting the Precision Seeding uniformity of feed mechanism for seed also further.In addition, in actually sowing operation, since tractor exists
Straight line is different from travel speed during headland turn during advancing, and absorption kind grain is remained to when if keeping compared with the slow-speed of revolution,
It is then easy to adsorb more extra kind of grains because revolving speed improves, negative pressure increases when high speed, to further increase the uneven of seeding
Property.
Summary of the invention
The object of the present invention is to provide a kind of aspirated-air type seeding element, which can preferably overcome common circle seam when inhaling kind
With the deficiency of slot type circle seam extra kind of grain of absorption, make to inhale kind more evenly, and can reduce and adsorb extra kind of grain because negative pressure is excessive
The probability of occurrence of phenomenon.
To achieve the goals above, the present invention adopts the following technical scheme that:
A kind of aspirated-air type seeding element, including the first tubular portion and the second tubular portion, first tubular portion is outwardly around being connected with
First expanding surface, the second tubular portion are set outwardly around the second expanding surface, the first expanding surface is connected with relative to the inclination of the first tubular portion
Set, the second expanding surface is obliquely installed relative to the second tubular portion, first expanding surface and the second expanding surface opening it is opposite and
Circumferential weld is formed between open edge.
Preferably, first expanding surface is the first round table surface for being connected to first tubular portion open end, described
Two expanding surfaces are the second round table surface for being connected to second tubular portion open end.
Preferably, the hatching of first round table surface and the second round table surface is two waists of isosceles trapezoid, the isosceles ladder
The upper bottom of shape is the circumferential weld, and the width of circumferential weld is 0.4 ~ 0.55mm, a height of 3 ~ 5mm of the isosceles trapezoid.
Preferably, first tubular portion is connected with the second tubular portion through interconnecting piece.
Preferably, the interconnecting piece is the interval in a ring for being connected to first tubular portion and the second tubular portion open end
The floor of arrangement.
Preferably, the interconnecting piece includes the connecting rod inside the first tubular portion and the second tubular portion, the first tubular portion
It is mounted on the connecting rod through first support, the second tubular portion is supported on the connecting rod through second connecting rod.
Another object of the present invention is by a kind of air-suction seeding unit, which utilizes above-mentioned aspirated-air type seeding member
Part has corresponding seeding effect.Technical solution is as follows:
A kind of air-suction seeding unit comprising one or several above-mentioned aspirated-air type seeding elements being sequentially connected in series are being located at one
First tubular portion at end is equipped with tracheae interconnecting piece, and driving portion is equipped in second tubular portion for being located at the other end.
It is also another object of the present invention to provide a kind of aspirated-air type dispenser, the dispenser ratio have it is common circle seam or
The Seeding Uniformity of the dispenser of the line of rabbet joint is higher, and when the negative pressure that tractor blower generates is larger, is still able to maintain Gao Shui
Flat uniform seeding.Technical solution is as follows:
A kind of aspirated-air type dispenser, including feed mechanism for seed and plants case, the feed mechanism for seed be above-mentioned air-suction seeding unit, described kind
Case includes cabinet, in cabinet lower end there are kind of a mouth is gone out, is equipped with several grooves, the feed mechanism for seed installation going out kind of mouth upper side wall edge
It plants on mouth out, first expanding surface and the second expanding surface are located in the groove, and the groove stays above the circumferential weld
Have kind of an eye, between the two sidewalls of the groove and first expanding surface and the second expanding surface at most there are seed can not by
Gap.
It further, further include seeds scraper, at most there are seeds to lead between the seeds scraper and the circumferential weld surface
The gap crossed.
It can also further include cleaning plate, the cleaning plate is arranged in the circumferential weld and for clearing up the blocking on circumferential weld
Object.
In technical solution of the present invention, the circumferential weld two sides of aspirated-air type seeding element pass through expanding surface under inclination and two sides
Tubular portion be connected, so that circumferential weld be in the position at tip and vertex, such circumferential weld is stitched when drawing kind of grain with previous common circle
The suction kind position for inhaling kind of position or the line of rabbet joint is compared, since circumferential weld two sides lack the recessed of previous horizontal round tube outer surface or recess
The support of groove sidewall, just more difficult absorption is located at extra kind of grain outside circumferential weld.And it is this formed by two sides expanding surface it is convex
Structure is played, makes it possible to match the boss with the groove in plants case, the kind of groove top is ophthalmically acceptable to inhale in by circumferential weld
Attached kind grain, and groove two sides are used to stop extra kind grain, this cooperation has been further ensured that is connected by said elements
At feed mechanism for seed seeding uniformity.Because even wind pressure is excessive, above structure will not adsorb extra kind of grain, thereby enhance
To the adaptability that fan pressure changes to the upper limit, reduce in the past to fan pressure need that more accurate control paid it is various at
This.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of air-suction seeding unit first embodiment of the present invention；
Fig. 2 is the structural schematic diagram of air-suction seeding unit second embodiment of the present invention；
Fig. 3 is the enlarged diagram of part A in Fig. 2；
The structural schematic diagram of Fig. 4 one embodiment of aspirated-air type dispenser of the present invention.
Specific embodiment
With reference to the accompanying drawing, the present invention will be further described:
As shown in Figure 1, aspirated-air type seeding element includes the first tubular portion 1 and the second tubular portion 2, the two can be a Duan Yuanguan,
It is connected with the first round table surface 101 outward in one end of the first tubular portion 1, the first round table surface 101 is a truncated cone-shaped shell, and thin mouth end connects
It connects in the first tubular portion 1, thick mouth end is stretched outside outside the first tubular portion 1.It is connected with the second rotary table outward in one end of the second tubular portion 2
Face 201 is also a truncated cone-shaped shell, and thin mouth end is connected in the second tubular portion 2, and thick mouth end is stretched outside outside the second tubular portion.This example
In select the first, second tubular portion be identical round tube, the first, second round table surface be identical truncated cone-shaped shell.First round table surface
101 and second the opening of round table surface 201 be oppositely arranged, form circumferential weld 3 between the edge of opening.First tubular portion 1 and the second pipe
The open end in shape portion 2 is connected and fixed by the floor 4 of interval annular array.Connect in the other end of the first tubular portion 1 equipped with tracheae
Socket part 5 is connected with tracheae and circumferential weld 3 is made to generate negative pressure.Driving portion 6 is set in the other end of the second tubular portion 2, can such as be made
It is driven handle, transmission gear etc., to drive the first, second tubular portion and circumferential weld rotation, to draw kind of a grain out of plants case, this is with regard to shape
At the air-suction seeding unit 9 with an aspirated-air type seeding element.In order to increase the uniformity of negative pressure, in the other end or centre
Tracheae interconnecting piece can also be added, is vented outwards using multiple tracheaes.In the present embodiment, circumferential weld two sides are tilted by round table surface
It is lower to be connected with the first, second tubular portion, so that circumferential weld is in tip or vertex position, when circumferential weld 3 is through negative-pressure adsorption kind grain, is only stitching
Kind of a grain can be adsorbed at gap, and in gap two sides, because being inclined-plane without support, grain is planted without being relied on, and is generated by circumferential weld avris merely
Suction be difficult to keep resting near circumferential weld 3, therefore can seldom adsorb extra kind of grain.And the negative pressure that blower generates increases
Afterwards, still more difficult absorption kind grain.The section lines of two sides expanding surface are two waists (Fig. 3) of isosceles trapezoid, and trapezoidal upper bottom is circumferential weld
3, width is less than kind of a grain width, but also to consider intake and vacuum magnitude, and preferably 0.4 ~ 0.55 millimeter, trapezoidal height characterization circle
Height of the table top relative to the first, second tubular portion protrusion also will affect the negative pressure of circumferential weld, preferably 3 ~ 5 millimeters.In fact, removing
Outside round table surface, other expanding surfaces can also be also selected, the bell mouth surface of certain internal concavity is such as had, even there is the wave to rise and fall
Shape expanding surface, and it is absolutely straight or smooth to not necessarily require expanding surface, but expanding surface will guarantee that circumferential weld is in vertex position, and
Circumferential weld two sides cannot be horizontal, and must stretch diagonally downward, so that kind grain loses support.
First tubular portion 1 and the second tubular portion 2, can also be such as Fig. 2 in addition to being interconnected and fixed by above-mentioned floor 4
Shown that a connecting rod 7 is arranged in the first, second tubular portion, the first tubular portion 1 is fixed on connecting rod 7 by bracket 701, the second pipe
Shape portion 2 is fixed on connecting rod 7 by bracket 702, and such first, second tubular portion can also be rotated together also.Also, connecting rod 7 can
To extend to both ends and hollow setting, connecting rod 7 is arranged stomata 703 and is connected to the first, second tubular portion, the first, second tubulose
Portion's both-side opening is sealed on connecting rod, by connecting rod exhaust and drive link, so that circumferential weld is generated negative pressure and be rotated.
Fig. 4 show an air suction type dispenser, including plants case 8 and air suction type feed mechanism for seed 10, air suction type feed mechanism for seed 10 by
Multiple air suction type seeding elements mutually concatenate, and the second tubular portion of one seeding element connects adjacent seeding element when concatenation
The first tubular portion, connecting portion can with two sides tubular portion be integrally formed make.In one end of entire air suction type feed mechanism for seed 10
The first tubular portion on stomata interconnecting piece is set, driving portion is set in the second tubular portion of the other end.It stays 81 lower end of cabinet of plants case 8
There is kind mouth 82 out, plants 82 upper side wall of mouth, 83 edge out and be equipped with several grooves 84.Air suction type feed mechanism for seed 10 is mounted on out on kind mouth 82,
And the first round table surface and the second round table surface are located in groove 84, and there are kind of eyes 85 at groove 84 top, plant eye 85 and are located at circumferential weld 3
Top, gap between the two are greater than the volume of a kind of grain, but multiple kinds of grains is not allowed to pass through.Groove two sidewalls and first
Can not stay gap between round table surface, the second round table surface substantially, or at most there are kind of grain can not by gap.
It is equipped with seeds scraper 86 on the downside of kind of mouth 82 going out, does not stay gap substantially with 3 surface of feed mechanism for seed circumferential weld, or at most stay
Have kind of grain can not by gap, kind of grain can be hung to fall into guide hole in this way, realize seeding.Certainly, seeds scraper 86
Also it can be set in other positions, be able to achieve and scrape kind.Cleaning plate can also be set on seeds scraper, be that cleaning plate is extend into
In circumferential weld 3, to wipe tamper off.
Through experimental tests, this dispenser seeding uniformity, accuracy are superior to plane-of-weakness joint type dispenser, by tractor row
It is smaller to sail the i.e. rotation speed of fan influence of fast jogging speed, meets the requirements at the higher level of small granule seed precise sowing.
Above-mentioned listed embodiment is the explanation to present inventive concept and realization, is not intended to limit it, in the present invention
Under design, without the technical solution that substantially converts still in protection scope.
Claims (10)
1. a kind of aspirated-air type seeding element, including the first tubular portion and the second tubular portion, which is characterized in that first tubular portion
Outwardly around the first expanding surface is connected with, the second tubular portion is outwardly around the second expanding surface is connected with, and the first expanding surface is relative to first
Tubular portion is obliquely installed, and the second expanding surface is obliquely installed relative to the second tubular portion, first expanding surface and the second expanding surface
Opening forms circumferential weld relatively and between open edge.
2. aspirated-air type seeding element as described in claim 1, which is characterized in that first expanding surface is to be connected to described the
First round table surface of one tubular portion open end, second expanding surface are the second circle for being connected to second tubular portion open end
Table top.
3. aspirated-air type seeding element as claimed in claim 2, which is characterized in that first round table surface and the second round table surface
Hatching is two waists of isosceles trapezoid, and the upper bottom of the isosceles trapezoid is the circumferential weld, and the width of circumferential weld be 0.4 ~
0.55mm, a height of 3 ~ 5mm of the isosceles trapezoid.
4. the aspirated-air type seeding element as described in claim 1,2 or 3, which is characterized in that first tubular portion and second
Tubular portion is connected through interconnecting piece.
5. aspirated-air type seeding element as claimed in claim 4, which is characterized in that the interconnecting piece is to be connected to first pipe
The floor spaced in a ring in shape portion and the second tubular portion open end.
6. aspirated-air type seeding element as claimed in claim 4, which is characterized in that the interconnecting piece includes being set to the first tubular portion
With the connecting rod inside the second tubular portion, the first tubular portion is mounted on the connecting rod through first support, and the second tubular portion is through second
Link supports are on the connecting rod.
7. a kind of air-suction seeding unit, which is characterized in that it include one or several be sequentially connected in series as claim 1,2,
3, aspirated-air type seeding element described in 5 or 6 is equipped with tracheae interconnecting piece, in place in first tubular portion for being located at one end
Driving portion is equipped in second tubular portion of the other end.
8. a kind of aspirated-air type dispenser, including feed mechanism for seed and plants case, which is characterized in that the feed mechanism for seed is such as claim 7
The air-suction seeding unit, the plants case include cabinet, in cabinet lower end there are kind of a mouth is gone out, are set going out kind of a mouth upper side wall edge
There are several grooves, the feed mechanism for seed is installed out on kind mouth, and first expanding surface and the second expanding surface are located in the groove, institute
Groove is stated in the top of the circumferential weld there are kind of an eye, the two sidewalls of the groove and first expanding surface and the second expanding surface it
Between at most there are seed can not by gap.
9. aspirated-air type dispenser as claimed in claim 8, which is characterized in that it further include seeds scraper, the seeds scraper and institute
State between circumferential weld surface at most there are seed can not by gap.
10. aspirated-air type dispenser as claimed in claim 8, which is characterized in that it further include cleaning plate, the cleaning plate setting
In the circumferential weld and for clearing up the tamper on circumferential weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159761.6A CN110089242A (en) | 2018-09-30 | 2018-09-30 | Air-suction type seed metering element, seed metering device and seed metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159761.6A CN110089242A (en) | 2018-09-30 | 2018-09-30 | Air-suction type seed metering element, seed metering device and seed metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110089242A true CN110089242A (en) | 2019-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811159761.6A Pending CN110089242A (en) | 2018-09-30 | 2018-09-30 | Air-suction type seed metering element, seed metering device and seed metering device |
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| CN (1) | CN110089242A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0614613A (en) * | 1992-03-19 | 1994-01-25 | Yanmar Agricult Equip Co Ltd | Suction type seeder |
| CN1703945A (en) * | 2004-06-03 | 2005-12-07 | 河北农业大学 | Dual-purpose round tube type air-suction seed sowing device for corn and wheat |
| CN101496468A (en) * | 2008-11-11 | 2009-08-05 | 河北农业大学 | Seed stirring device of circular tube air suction seed sowing device |
| US20100224110A1 (en) * | 2009-03-06 | 2010-09-09 | Nathan A Mariman | Seed Meter And Seed Disk With Peripheral Edge Seed Pick-Up |
| CN103843499A (en) * | 2012-12-03 | 2014-06-11 | 河北农业大学 | Disc air-suction type seed metering device |
| CN107155458A (en) * | 2017-06-14 | 2017-09-15 | 河北农业大学 | Air-suction type precision seeder |
| CN208836511U (en) * | 2018-09-30 | 2019-05-10 | 河北农业大学 | Air-suction type seed metering element, seed metering device and seed metering device |
-
2018
- 2018-09-30 CN CN201811159761.6A patent/CN110089242A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0614613A (en) * | 1992-03-19 | 1994-01-25 | Yanmar Agricult Equip Co Ltd | Suction type seeder |
| CN1703945A (en) * | 2004-06-03 | 2005-12-07 | 河北农业大学 | Dual-purpose round tube type air-suction seed sowing device for corn and wheat |
| CN101496468A (en) * | 2008-11-11 | 2009-08-05 | 河北农业大学 | Seed stirring device of circular tube air suction seed sowing device |
| US20100224110A1 (en) * | 2009-03-06 | 2010-09-09 | Nathan A Mariman | Seed Meter And Seed Disk With Peripheral Edge Seed Pick-Up |
| CN103843499A (en) * | 2012-12-03 | 2014-06-11 | 河北农业大学 | Disc air-suction type seed metering device |
| CN107155458A (en) * | 2017-06-14 | 2017-09-15 | 河北农业大学 | Air-suction type precision seeder |
| CN208836511U (en) * | 2018-09-30 | 2019-05-10 | 河北农业大学 | Air-suction type seed metering element, seed metering device and seed metering device |
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