CN107926902B - Gravity self-driven pesticide applying device - Google Patents
Gravity self-driven pesticide applying device Download PDFInfo
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- CN107926902B CN107926902B CN201711242458.8A CN201711242458A CN107926902B CN 107926902 B CN107926902 B CN 107926902B CN 201711242458 A CN201711242458 A CN 201711242458A CN 107926902 B CN107926902 B CN 107926902B
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- pesticide
- storage chamber
- circular tube
- pesticide storage
- disc
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0025—Mechanical sprayers
- A01M7/0028—Centrifugal sprayers
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The invention discloses a gravity self-driven pesticide applying device, and belongs to the technical field of agricultural machinery. The gravity self-driven pesticide applying device comprises a flying rotor, a fixed disc, a circular tube and a pesticide storage chamber, wherein the fixed disc is provided with a through hole, one end of the circular tube is arranged in the through hole, and the other end of the circular tube extends into the pesticide storage chamber and is connected with a centrifugal blade fan; the lower end of the flying rotor wing is inserted into the circular tube, a screw nut and a clamping device are arranged in the circular tube, one end of the screw nut is connected with the lower end of the flying rotor wing, and the other end of the screw nut is inserted into the clamping device; the round tube is also sleeved with a limiting disc, the limiting disc is fixed above the pesticide storage chamber, and a rod piece on the pesticide storage chamber passes through the limiting disc and is fixedly connected with the fixed disc. The invention has the advantage of convenient and quick spraying. And the rotation of the centrifugal blade fan can fully refine the pesticide, so that the pesticide is easier to absorb by crops, and the utilization rate of the pesticide is improved.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a gravity self-driven pesticide applying device.
Background
In crop planting, pesticide spraying and applying are one of the necessary steps. How to use pesticides safely and efficiently has become a very interesting topic for the whole society.
At present, many unmanned aerial vehicles for applying pesticides have appeared, the unmanned aerial vehicles have the characteristics of low operation height, less drift, hoverability and no need of a special take-off and landing airport, downward airflow generated by a rotor wing of the unmanned aerial vehicle is favorable for increasing penetrability of fog flow to crops, and the unmanned aerial vehicle has the advantages of good control effect, long-distance remote control operation, avoidance of danger close to pesticides by spraying operators, improvement of spraying operation safety and the like. However, both the Japanese unmanned helicopter and the domestic plant protection unmanned plane adopt mechanical sprayers or traditional spraying devices, the principle is that the liquid medicine is directly thrown out and sprayed on crops by using a gear rotating at high speed, and the thrown liquid medicine is in a water drop shape and cannot form extremely fine mist-like diffused liquid medicine mist, so that the liquid medicine is wasted to a certain extent, and adults and larvae which suck plant juice on the back of leaf surfaces are difficult to kill.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a gravity self-driven pesticide applying device which has the advantages of convenient and quick pesticide spraying, and the rotation of the centrifugal blade fan can fully refine the pesticide, so that the crop is easier to absorb, and the pesticide utilization rate is improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the gravity self-driven pesticide applying device comprises a flying rotor, a fixed disc, a circular tube and a pesticide storage chamber, wherein a through hole is formed in the fixed disc, one end of the circular tube is arranged in the through hole, and the other end of the circular tube extends into the pesticide storage chamber and is connected with a centrifugal blade fan; the lower end of the flying rotor wing is inserted into the circular tube, and the inner diameter of the circular tube is matched with the diameter of the lower end of the flying rotor wing; a screw rod nut and a clamping device are arranged in the circular tube, one end of a screw rod in the screw rod nut is connected with the lower end of the flying rotor wing and is integrally formed, and the other end of the screw rod in the screw rod nut is inserted into the clamping device and is connected with the clamping device; the clamping device is fixed in the circular tube; the middle part of pipe still overlaps and is equipped with a spacing disc, spacing disc is located the top of pesticide storage room is through the marble in the screens device is fixed, the member on the pesticide storage room passes spacing disc with the bottom fixed connection of fixed disc.
Further, the clamping device comprises a sleeve, a propping piece and a spring piece, wherein the upper end of the sleeve is connected with the screw nut, the spring piece is U-shaped, two ends of an opening of the U-shaped spring piece are connected with two opposite sides of the bottom of the sleeve, one end of the propping piece is connected with the middle of the bottom of the sleeve, the other end of the propping piece is propped against the inner bottom of the U-shaped spring piece, and the two sides of the U-shaped spring piece are respectively provided with a marble, and the two marbles are retractably arranged on two opposite sides of the round tube.
Further, the pesticide storage chamber is formed by surrounding a plurality of charging blades with a rod, and the charging blades are sealed by sealing rubber strips.
Further, the charging blade is arc-shaped, and the pesticide storage chamber is a circular pesticide storage chamber surrounded by the arc-shaped charging blade.
Further, the number of the charging blades is four, the corresponding rod pieces are four, and the four rod pieces respectively penetrate through four through holes formed in the periphery of the limiting disc and are fixedly connected with the fixed disc.
Further, springs are further arranged between the fixed disc and the limiting disc, and the number of the springs is four, and the four springs are respectively arranged between adjacent rod pieces in the four rod pieces.
Further, the through hole on the limiting disc for penetrating the circular tube is coaxial with the through hole of the fixing disc.
Further, one end of the round tube extending into the pesticide storage chamber is further sleeved with a radial sliding sheet, the centrifugal blade fan is fixedly arranged on the radial sliding sheet, and the number of the centrifugal blade fan is two to four.
Further, a limit nut used for preventing the radial sliding vane and the centrifugal vane fan from sliding downwards is arranged at the bottom of one end of the circular tube extending into the pesticide storage chamber.
Further, a first sealing piston is arranged at the upper end of the pesticide storage chamber, a second sealing piston is arranged at the bottom of the pesticide storage chamber, and two ends of the sealing rubber strip are fixed on the pesticide storage chamber through the first sealing piston and the second sealing piston respectively.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
(1) According to the invention, the centrifugal blade fan in the pesticide storage chamber is driven to rotate by the rotation of the flying rotor wing, the screw nut is driven to rotate, the nut on the screw nut moves downwards, when the nut on the screw nut moves to a certain position, the clamping device in the spiral circular tube is pressed down, the marble in the clamping device contracts inwards in the circular tube, so that the limiting disc contracts upwards, the pesticide storage chamber is opened, pesticide in the pesticide storage chamber is discharged under the rotation of the centrifugal blade fan, and the effective combination of the flying rotor wing, the centrifugal blade fan, the screw nut, the clamping device, the limiting disc and the like is fully utilized, so that the pesticide spraying device has the effect of being convenient and quick. And the rotation of the centrifugal blade fan can fully refine the pesticide, so that the pesticide is easier to absorb by crops, and the utilization rate of the pesticide is further improved.
(2) According to the clamping device, the pesticide storage chamber can be opened rapidly through the arrangement of the spring piece and the marble, so that the pesticide application efficiency is improved.
Drawings
FIG. 1 is a schematic view of the external structure of a gravity self-driven pesticide applying device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of a gravity self-driven pesticide applying device according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a gravity self-propelled pesticide applying device according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a detent device in a gravity self-driven pesticide applying device according to an embodiment of the present invention.
In the figure, 1-flight rotor, 2-end cover, 3-fixed disc, 4-screw nut, 5-clamping device, 5-1-sleeve, 5-2-propping piece, 5-3-spring piece, 5-4-marble, 6-pesticide storage room, 6-1-member, 6-2-charging blade, 7-round tube, 8-centrifugal blade fan, 9-limit nut, 10-bolt, 11-thrust ball bearing, 12-spring, 13-limit disc, 14-semicircle segment, 15-first sealing piston, 16-sealing rubber strip, 17-radial slide sheet, 18-second sealing piston.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Examples
Referring to fig. 1-4, a gravity self-driven pesticide applying device comprises a flying rotor 1, a fixed disc 3, a circular tube 7 and a pesticide storage chamber 6, wherein the circular tube 7 is a spiral circular tube. The fixed disc 3 is provided with a through hole (not shown), one end of the circular tube 7 is arranged in the through hole and is in rolling connection with the fixed disc 3 through a thrust ball bearing 11 arranged in the fixed disc 3, so that friction between the circular tube 7 and the fixed disc 3 is rolling friction, and further the flying rotor 1 can drive the circular tube 7 to rotate more easily. The other end of the round tube 7 extends into the pesticide storage chamber 6 and is connected with a centrifugal blade fan 8. The lower end of the flying rotor 1 is inserted into the circular tube 7, and the inner diameter of the circular tube 7 is matched with the diameter of the lower end of the flying rotor 1, so that the lower end of the flying rotor 1 is in threaded fastening connection with the circular tube 7. A screw nut 4 and a clamping device 5 are arranged in the round tube 7, one end of a screw in the screw nut 4 is connected with the lower end of the flying rotor 1 and is integrally formed, and the other end of the screw is inserted into the clamping device 5 and is connected with the clamping device 5. The clamping device 5 is fixed on a semicircular segment 14 in the circular tube 7, wherein the semicircular segment 14 is fixed in the circular tube 7 through bolts. The middle part of the round tube 7 is also sleeved with a limit disc 13, and the limit disc 13 is arranged above the pesticide storage chamber 6 and is fixed by the marble 5-4 in the clamping device 5. Meanwhile, the through hole on the limiting disc 13 for penetrating the round tube 7 is coaxially arranged with the through hole of the fixed disc 3. The rod piece 6-1 on the pesticide storage chamber 6 passes through the limit disc 13 and is fixedly connected with the bottom of the fixed disc 3 through bolts. In this embodiment, the fixed disc 3 is further provided with an end cover 2, and the end cover 2 is fixedly connected with the fixed disc 3 through a bolt 10.
In addition, still be equipped with the spring 12 that is convenient for spacing disc 13 shrink between fixed disc 3 and the spacing disc 13, the bottom fixed connection of one end and fixed disc 3 of spring 12, the other end and spacing disc 13 fixed connection. Four springs 12 are provided in the present embodiment, and four springs 12 are respectively disposed between adjacent ones of the four rod members 6-1.
Further, the detent device 5 in this embodiment includes a sleeve 5-1, a supporting member 5-2 and a spring piece 5-3, wherein the upper end of the sleeve 5-1 is connected with the screw nut 4, the spring piece 5-3 is U-shaped, and two ends of the opening of the U-shaped spring piece 5-3 are connected with two opposite sides of the bottom of the sleeve 5-1. One end of the propping piece 5-2 is connected with the middle of the bottom of the sleeve 5-1, the other end of the propping piece 5-2 is connected with the inner bottom of the U-shaped spring piece 5-3 in a propping way, the two sides of the U-shaped spring piece 5-3 are respectively provided with a marble 5-4, the two marbles 5-4 can be retractably penetrated on the two opposite sides of the semicircular tube piece 14 and the circular tube 7 and are positioned above the limiting disc 13, so that the limiting disc 13 is further clamped and fixed, and when the marbles 5-4 are retracted, the limiting disc 13 can be retracted upwards.
Further, the pesticide storage chamber 6 is formed by being surrounded by a plurality of charging blades 6-2 with a rod member 6-1, and the plurality of charging blades 6-2 are sealed by a sealing rubber strip 16. The sealing rubber strip 16 is i-shaped, and in an initial state (i.e. when the pesticide storage chamber 6 is not opened), the sealing rubber strip 16 is fixed between the charging blades 6-2 due to the pressing force of the charging blades 6-2, and when the pesticide storage chamber 6 is opened, the resistance of the sealing rubber strip 16 to the charging blades 6-2 is small, so that the charging blades 6-2 can be smoothly opened. In the embodiment, the charging blades 6-2 are circular arc-shaped, and the pesticide storage chamber 6 is a circular pesticide storage chamber surrounded by the circular arc-shaped charging blades 6-2. Meanwhile, in the embodiment, four medicine loading blades 6-2 are selected, four corresponding rod pieces 6-1 are adopted, and the four rod pieces 6-1 respectively penetrate through four through holes (not shown) formed in the periphery of the limiting disc 13 and are fixedly connected with the fixed disc 3. In the invention, the area of the limiting disc 13 is larger than that of the fixed disc 3, so that the circumferential area enclosed by the end parts of the four rod pieces 6-1 penetrating through the limiting disc 13 is larger than that enclosed by the end parts of the four rod pieces 6-1 fixed on the fixed disc 3, and the pesticide storage chamber 6 is more convenient to open after the limiting disc 13 is contracted upwards.
Further, a radial sliding sheet 17 is further sleeved on one end of the circular tube 7 extending into the pesticide storage chamber 6, the centrifugal blade fan 8 is fixedly arranged on the radial sliding sheet 17, the radial sliding sheet 17 enables the centrifugal blade fan 8 to be more firmly arranged on the circular tube 7, and the centrifugal blade fan 8 can be selected from two to four pieces, and in the embodiment, four pieces are preferable.
Further, a limit nut 9 is further arranged at the bottom of one end of the round tube 7 extending into the pesticide storage chamber 6, and is used for preventing the radial sliding sheet 17 and the centrifugal blade fan 8 from sliding downwards.
Further, a first sealing piston 15 is arranged at the upper end of the pesticide storage chamber 6, the first sealing piston 15 is made of rubber, and the first sealing piston 15 is in interference fit with the upper end of the pesticide storage chamber 6 and the rotary round tube so as to achieve a sealing effect. The bottom of the pesticide storage chamber 6 is provided with a second sealing piston 18, the material of the second sealing piston 18 is rubber, and the second sealing piston is in interference fit with the lower end of the pesticide storage chamber 6 (namely, the lower circular opening surrounded by the pesticide loading blade 6-2), so that the sealing rubber strip 16 is fixed. The two ends of the sealing rubber strip 16 are respectively fixed on the pesticide storage chamber 6 through the first sealing piston 15 and the second sealing piston 18, so that the sealing rubber strip 16 has better sealing effect.
The gravity self-driven pesticide applying device of the invention has the working principle that:
under the action of gravity, a pressure difference is generated on the upper side and the lower side of the flying rotor wing 1, so that the flying rotor wing 1 rotates. Because the flying rotor 1 is connected with the circular tube 7 through threads, the rotation of the flying rotor 1 drives the centrifugal blade fan 8 in the pesticide storage chamber 6 to rotate. At the same time, the flying rotor 1 drives the screw rod to rotate, and the screw rod nut 4 moves downwards. When the screw nut 4 moves to a certain position, the clamping device 5 in the circular tube 7 is pressed down, the marble 5-4 on the elastic reed 5-3 in the clamping device 5 contracts inwards in the circular tube 7, so that the limiting disc 13 contracts upwards, meanwhile, the charging blade 6-2 opens upwards under the action of spring force, and the pesticide storage chamber 6 opens. Finally, the pesticide obtains the outward diffusion centrifugal force under the action of the centrifugal blade fan 8, and the pesticide application effect with a certain coverage range is achieved.
The invention fully utilizes the effective combination of the flying rotor wing 1, the centrifugal blade fan 8, the screw nut 4, the clamping device 5, the limiting disc 13 and the like, and has the effect of conveniently and rapidly spraying the medicine. And the rotation of the centrifugal blade fan 8 can fully refine the pesticides, so that the pesticides are easier to absorb by crops, and the utilization rate of the pesticides is further improved. In addition, the clamping device 5 can enable the pesticide storage chamber 6 to be opened rapidly through the arrangement of the spring piece 5-3 and the marble 5-4, and pesticide application efficiency is improved.
The foregoing description is directed to the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the invention, and all equivalent changes or modifications made under the technical spirit of the present invention should be construed to fall within the scope of the present invention.
Claims (7)
1. The gravity self-driven pesticide applying device is characterized by comprising a flying rotor, a fixed disc, a circular tube and a pesticide storage chamber, wherein a through hole is formed in the fixed disc, one end of the circular tube is arranged in the through hole and is in rolling connection with the fixed disc through a thrust ball bearing arranged in the fixed disc, and the other end of the circular tube extends into the pesticide storage chamber and is connected with a centrifugal blade fan; the lower end of the flying rotor wing is inserted into the circular tube, and the inner diameter of the circular tube is matched with the diameter of the lower end of the flying rotor wing; a screw rod nut and a clamping device are arranged in the circular tube, one end of a screw rod in the screw rod nut is connected with the lower end of the flying rotor wing and is integrally formed, and the other end of the screw rod in the screw rod nut is inserted into the clamping device and is connected with the clamping device; the clamping device is fixed in the circular tube; the middle part of the circular tube is also sleeved with a limiting disc, the limiting disc is arranged above the pesticide storage chamber and is fixed through a marble in the clamping device, and a rod piece on the pesticide storage chamber passes through the limiting disc and is fixedly connected with the bottom of the fixed disc;
the clamping device comprises a sleeve, a propping piece and a spring piece, wherein the upper end of the sleeve is connected with the screw rod nut, the spring piece is U-shaped, the two ends of an opening of the U-shaped spring piece are connected with two opposite sides of the bottom of the sleeve, one end of the propping piece is connected with the middle of the bottom of the sleeve, the other end of the propping piece is in butt joint with the inner bottom of the U-shaped spring piece, the two sides of the U-shaped spring piece are respectively provided with a marble, and the two marbles are retractably arranged on two opposite sides of the round tube;
the pesticide storage chamber is formed by surrounding a plurality of charging blades with a rod piece, and the charging blades are sealed by sealing rubber strips;
springs are further arranged between the fixed disc and the limiting disc, and the number of the springs is four, and the four springs are respectively arranged between adjacent rod pieces in the four rod pieces.
2. The gravity self-driven pesticide applying device of claim 1, wherein the charging blade is circular arc-shaped, and the pesticide storage chamber is a circular pesticide storage chamber surrounded by the circular arc-shaped charging blade.
3. The gravity self-driven pesticide applying device according to claim 2, wherein the number of the charging blades is four, the corresponding rods are four, and the four rods respectively pass through four through holes formed in the periphery of the limiting disc and are fixedly connected with the fixed disc.
4. The gravity self-propelled pesticide applying device of claim 1, wherein the through hole in the limit disk for passing through the circular tube is coaxially disposed with the through hole in the fixed disk.
5. The gravity self-driven pesticide applying device according to claim 1, wherein one end of the circular tube extending into the pesticide storage chamber is further sleeved with a radial sliding sheet, the centrifugal blade fan is fixedly arranged on the radial sliding sheet, and the centrifugal blade fan is two to four.
6. The gravity self-propelled pesticide applying device of claim 5, wherein a stop nut for preventing the radial slide and the centrifugal blade from sliding downward is further provided at a bottom of one end of the circular tube extending into the pesticide storage chamber.
7. The gravity self-driven pesticide applying device according to claim 1, wherein a first sealing piston is arranged at the upper end of the pesticide storage chamber, a second sealing piston is arranged at the bottom of the pesticide storage chamber, and two ends of the sealing rubber strip are fixed on the pesticide storage chamber through the first sealing piston and the second sealing piston respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711242458.8A CN107926902B (en) | 2017-11-30 | 2017-11-30 | Gravity self-driven pesticide applying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711242458.8A CN107926902B (en) | 2017-11-30 | 2017-11-30 | Gravity self-driven pesticide applying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107926902A CN107926902A (en) | 2018-04-20 |
| CN107926902B true CN107926902B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711242458.8A Active CN107926902B (en) | 2017-11-30 | 2017-11-30 | Gravity self-driven pesticide applying device |
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| CN (1) | CN107926902B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111528206B (en) * | 2020-06-01 | 2021-09-21 | 赵强 | Afforestation sprays deinsectization equipment with portable medicament |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2510406B2 (en) * | 1994-06-23 | 1996-06-26 | 株式会社こうべ技研 | Pesticide spraying device mounted on radio control helicopter |
| CN201398392Y (en) * | 2009-04-17 | 2010-02-10 | 刘琦 | Aerial sprayer for pesticide |
| JP5700796B2 (en) * | 2011-01-21 | 2015-04-15 | ニューデルタ工業株式会社 | Unmanned helicopter chemical spraying device |
| CN104354864B (en) * | 2014-10-29 | 2017-04-12 | 浙江大学 | Rotary wing type unmanned aerial vehicle for spraying pesticides |
| CN205589500U (en) * | 2016-05-12 | 2016-09-21 | 江西兴航智控航空工业有限公司 | Unmanned aerial vehicle who sprays insecticide |
| CN205589496U (en) * | 2016-05-12 | 2016-09-21 | 江西兴航智控航空工业有限公司 | Spray efficient pesticide and spray unmanned aerial vehicle |
| CN206394892U (en) * | 2016-12-10 | 2017-08-11 | 天津飞眼无人机科技有限公司 | A kind of pesticide spraying aircraft |
| CN206612069U (en) * | 2017-02-23 | 2017-11-07 | 安阳全丰生物科技有限公司 | A kind of aerosol spraying spraying system suitable for unmanned plane |
| CN206658905U (en) * | 2017-04-05 | 2017-11-24 | 山西如虹盛达科技有限公司 | A kind of pesticide spraying device suitable for agricultural unmanned plane |
| CN107244418A (en) * | 2017-07-21 | 2017-10-13 | 桐乡市锦格家纺有限公司 | A kind of agricultural chemicals of unmanned plane carries flusher |
| CN207978785U (en) * | 2017-11-30 | 2018-10-19 | 广西大学 | A kind of dynamic pesticide applicator of gravity driven |
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2017
- 2017-11-30 CN CN201711242458.8A patent/CN107926902B/en active Active
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