CN105723908A - Compound fertilizer sucking device - Google Patents
Compound fertilizer sucking device Download PDFInfo
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- CN105723908A CN105723908A CN201610096434.5A CN201610096434A CN105723908A CN 105723908 A CN105723908 A CN 105723908A CN 201610096434 A CN201610096434 A CN 201610096434A CN 105723908 A CN105723908 A CN 105723908A
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- fertile
- fertilizer
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- hole
- inhales
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/04—Distributing under pressure; Distributing mud; Adaptation of watering systems for fertilising-liquids
- A01C23/042—Adding fertiliser to watering systems
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Fertilizing (AREA)
Abstract
The invention relates to the technical field of agricultural irrigation device, and discloses a compound fertilizer sucking device which comprises a water inlet section, a fertilizer sucking cavity and a fertilizer outlet section. The water inlet section is connected with the fertilizer outlet section through the fertilizer sucking cavity. The water inlet section comprises a water inlet pipe, a contraction pipe and a nozzle which are sequentially communicated. The nozzle is located in the fertilizer sucking cavity. The fertilizer outlet section comprises a mixing chamber, a dispersing pipe and a fertilizer outlet pipe which are sequentially communicated. The end, away from the dispersing pipe, of the mixing chamber is communicated with the fertilizer sucking cavity. The nozzle is opposite to the mixing chamber. A plurality of fertilizer sucking holes are formed in the fertilizer sucking cavity and used for sucking various types of single-element pure fertilizer into the fertilizer sucking cavity at the same time. Various types of single-element pure fertilizer can be mixed with water at the same time, and the device is high in systematic integrity, small in occupied space, and high in fertilizer sucking performance and reliability and meanwhile effectively improves the water and fertilizer mixing efficiency.
Description
Technical field
The present invention relates to agricultural irrigation equipment technical field, particularly relate to a kind of combined type and inhale fertile device.
Background technology
Along with the development of agricultural modernization, Irrigation and fertilization system importance in development industrialized agriculture, water-saving agriculture and the ecological agriculture etc. becomes increasingly conspicuous.Irrigation and fertilization system is a kind of will to irrigate, inhale the new technique that fertile and fertilising combines together, by being supplied to crops after fertilizer stock solution mix with clear water, reduces and inhales fertile, fertilization time, saving labor of fertilizer application power, the utilization rate of raising fertilizer.
In agricultural water-saving irrigation field, fertilizer device of inhaling of the prior art is generally the fertile device of venturi suction, it is a kind of fertile device of a kind of suction utilizing Venturi tube mixing principle to develop that venturi inhales fertile device, in order to reach water-saving irrigation, to improve liquid manure utilization ratio and save the purpose of labour force.Venturi tube is first to shrink the pipeline then expanded gradually, and it mainly includes entrance, contraction section, venturi and diffuser, and common venturi is inhaled fertile device and is made up of the Venturi tube of a standard and the introducing pipe being arranged on venturi side.The entrance of venturi conduit has passed into pressure steady flow, after current enter contraction section, along with section is gradually reduced, the pressure of current increases, and water velocity also increases therewith, owing to the transition of section is discontinuous, first shrink, amplify afterwards, sudden change occurs, therefore follow closely prominent tapered near can produce negative pressuren zone in minimum scope, the negative pressure value size of this negative pressuren zone and area size depend primarily on the front and back pressure reduction of venturi in Venturi tube and the structural design of venturi.Utilizing pressure difference by liquid fertilizer through introducing in pipe intake line, solution and clear water are blended, be flowed into together in diffuser therewith again, finally flow out and be supplied to crops, this suction fertilizer apparatus structure is simple, and equipment cost is cheap, and mixed effect is good.
In actual applications, what agricultural irrigation fertilising used mostly is compound fertilizer, mixed by the pure fertilizer of multiple single element, when utilizing existing venturi to inhale fertile device, it is necessary to multiple Venturi tubes work simultaneously, the level of integrated system of the fertile device of whole suction is low, taken up space big, venturi easily blocks, and fertilizer-sucting performance and reliability are low, and the mixing efficiency of liquid manure is low.
Summary of the invention
The technical problem to be solved is to overcome deficiency of the prior art, a kind of combined type is provided to inhale fertile device, to realize mixing multiple fertilizer solution with water simultaneously, this apparatus system integrated level is high, take up room little, fertilizer-sucting performance and the low height of reliability, and the mixing efficiency of liquid manure can be effectively improved.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is as follows:
A kind of combined type inhales fertile device, including inlet segment, inhales fertile chamber and goes out fertile section, described inlet segment with described go out fertile section be connected by described suction fertilizer chamber；Described inlet segment includes the water inlet pipe, collapsible tube and the nozzle that are sequentially communicated, described nozzle is positioned at the fertile intracavity of described suction, described go out fertile section include the mixing chamber, anemostat and the fertilizer producing tube that are sequentially communicated, described mixing chamber connects with described fertilizer chamber of inhaling away from one end of described anemostat, described nozzle and described mixing chamber are oppositely arranged, described suction is provided with multiple fertile hole of inhaling on fertile chamber, multiple fertile holes of described suction for being drawn into fertile intracavity simultaneously by pure for multiple single element fertilizer.
Further, the described center inhaling fertile hole is evenly distributed on the circumference that same Radius is corresponding.
Further, the aperture in multiple fertile holes of described suction is all equal.
Further, the aperture of described first through hole is equal away from one end outer diameter of water inlet pipe with described inlet segment, and the aperture of described second through hole is equal with the outer diameter of described mixing chamber.
Further, described inhale fertile chamber be shaped as cylinder, spheroid or polygonal body.
Further, the described cavity inhaling fertile chamber is made up of polrvinyl chloride material.
Further, described inlet segment is revolving body with going out fertile section.
Further, described combined type is inhaled fertile device and is also included pressure vacuum gauge and effusion meter electromagnetic valve, and described pressure vacuum gauge inhales the negative pressure value of fertile intracavity for measuring, and described effusion meter electromagnetic valve is passed into, for measuring and controlling, the fertilizer-sucting quantity inhaling fertile intracavity.
Compared with prior art, the method have the advantages that
A kind of combined type provided by the invention inhales fertile device, inlet segment is connected by the fertile chamber of suction with going out fertile section, and by being provided with the fertile hole of multiple suction on the fertile chamber of suction, to realize being mixed with water by pure for multiple single element fertilizer and applying fertilizer simultaneously, inhale fertile intracavity and be not susceptible to blocking, the level of integrated system of this device is high, takes up room little, and is effectively improved the mixing efficiency of fertilizer-sucting performance, reliability and liquid manure.
Accompanying drawing explanation
Fig. 1 is the generalized section that combined type provided by the invention inhales fertile device；
Fig. 2 is the distribution schematic diagram inhaling fertile hole in the present invention.
In figure, 1: water inlet pipe；2: collapsible tube；3: nozzle；4: mixing chamber；5: anemostat；6: fertilizer producing tube；7: inhale fertile chamber；8: inhale fertile hole；9: the first through holes；10: the second through holes；11: vacuum section.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " interior ", " outward ", " top ", " end " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
The combined type that the present embodiment provides inhales fertile device, including inlet segment, inhales fertile chamber 7 and goes out fertile section, inlet segment with go out fertile section and be connected by inhaling fertile chamber 7；Inlet segment includes the water inlet pipe 1 being sequentially communicated, collapsible tube 2 and nozzle 3, nozzle 3 is positioned at the fertile chamber 7 of suction, go out the mixing chamber 4 that fertile section includes being sequentially communicated, anemostat 5 and fertilizer producing tube 6, mixing chamber 4 connects with inhaling fertile chamber 7 away from one end of anemostat 5, nozzle 3 and mixing chamber 4 are oppositely arranged, inhale and fertile chamber 7 is provided with the fertile hole 8 of multiple suction, multiple fertilizer holes 8 of inhaling for being drawn in fertile chamber 7 simultaneously by pure for multiple single element fertilizer, wherein, inlet segment and go out to be provided with between fertile section the fertile chamber 7 of suction, by being provided with the fertile hole 8 of multiple suction on the fertile chamber 7 of suction, different solutions can enter into mixing in the fertile chamber 7 of suction by different suction fertilizer holes 8 simultaneously, apply fertilizer, this apparatus system integrated level is high, take up room little, fertilizer-sucting performance and reliability are high, the mixing efficiency of liquid manure can be effectively improved.
Consistent and stable in order to ensure that different solution inhales fertilizer-sucting quantity during fertile hole 8 by difference, it is preferable that multiple centers inhaling fertile hole 8 are evenly distributed on the circumference that same Radius is corresponding.
Each is inhaled fertile hole 8 and is respectively connected with fertilzer sucking pipe, entered into after in the fertile chamber 7 of suction by inlet segment at current, there is pressure difference in the inside and outside of cavity inhaling fertile chamber 7, now, different types of single element solution is pooled in the fertile chamber 7 of suction by fertilzer sucking pipe by pressure difference, in order to ensure that each single element solution is equal by liquid pressure when inhaling fertile hole 8, the aperture in the preferred fertile hole 8 of multiple suction is all equal, each circulation area inhaling fertile hole 8 is equal, flow rate of liquid is equal, it is to avoid the Negative Pressure Difference inhaled in fertile chamber 7 is impacted.
Nozzle 3 and mixing chamber 4 are oppositely arranged, current can produce Negative Pressure Difference through sudden change section, that is, vacuum section 11 is there is between nozzle 3 and mixing chamber 4, preferred inlet segment and the connectivity part inhaling fertile chamber 7 are the first through hole 9, mixing chamber 4 and the connectivity part inhaling fertile chamber 7 are the second through hole 10, first through hole 9 and the second through hole 10 are coaxially disposed, the central shaft of the first through hole 9 and the second through hole 10 is arranged along water (flow) direction, so that current and multiple fertilizer solution are after vacuum section 11 blends, can be accurate, it is rapidly introduced in mixing chamber 4 and carries out secondary mixing, improve the mixing efficiency of liquid manure.
In order to ensure that inlet segment and mixing chamber 4 all connect stable and sealing effectiveness with inhaling between fertile chamber 7, the aperture of the first through hole 9 is equal away from one end outer diameter of water inlet pipe 1 with inlet segment, the aperture of the second through hole 10 is equal with the outer diameter of mixing chamber 4, preferably the aperture of the first through hole 9 is equal with the outer diameter of collapsible tube 2, it is arranged at collapsible tube 2 and nozzle 3 inhaling in fertile chamber 7, compact conformation, it is simple to operation, and then improve suction fertilizer efficiency rate；
That inhales fertile chamber 7 is shaped as cylinder, spheroid or polygonal body, inhales fertile chamber 7 and is preferably cube cavity, inhales fertile chamber 7 and makes big I and suitably adjust, and simple in construction is easy to process；Inhaling the surface being provided with the first through hole 9 and the second through hole 10 on fertile chamber 7 is plane, to ensure that between inlet segment and mixing chamber 4 and the fertile chamber 7 of suction, connected surface is respectively provided with excellent sealing effect.
The cavity inhaling fertile chamber 7 is made up of polrvinyl chloride material, and polrvinyl chloride is referred to as the general-purpose plastics that PVC, PVC are that yield is maximum in the world, and application widely, has good mechanical performance, and cost is low.
In order to ensure that combined type inhales the structural stability of fertile device, it is preferable that inlet segment and go out fertile section and be revolving body, so that inlet segment and go out fertile section when connecting with suction fertilizer chamber 7 with the second through hole 10 respectively through the first through hole 9, sealing effectiveness is good.
nullThe suction fertilizer situation of negative pressure value and each fertilzer sucking pipe pipeline for the ease of realizing the vacuum section 11 in the fertile chamber 7 of real-time synchronization detection suction，Combined type is inhaled fertile device and is also included pressure vacuum gauge and effusion meter electromagnetic valve，Pressure vacuum gauge is for measuring the negative pressure value inhaled in fertile chamber 7，Effusion meter electromagnetic valve is passed into, for measuring and controlling, the fertilizer-sucting quantity inhaled in fertile chamber 7，Detailed，When this combined type inhales fertile device busy，Pressure vacuum gauge and effusion meter electromagnetic valve are connected with this device and use，Wherein，Pressure vacuum gauge is preferably one，And be connected with a fertile hole 8 of suction，The negative pressure value of vacuum section 11 can be measured by this suction fertilizer hole 8，Effusion meter electromagnetic valve is preferably several，Each effusion meter electromagnetic valve is inhaled fertile hole 8 respectively and is connected with each，So that the suction fertilizer measuring each fertilizer-sucting quantity inhaling fertile hole 8 and fertile hole 8 place of control suction cut-offs.
As shown in Figure 1, in the present embodiment, compound inhales the preferably vertically placement of fertile device, that inhales fertile chamber 7 is preferably shaped to cube cavity, first through hole 9 and the second through hole 10 are preferably provided at the end face center inhaling fertile chamber 7 and place of bottom center respectively, as shown in Figure 2, multiple fertilizer holes 8 of inhaling are evenly distributed on the circumference of same Radius with bottom center for the center of circle, it is ensured that it is equal apart from the distance of vacuum section 11 that each inhales fertile hole 8, in order to improves pressure vacuum gauge and measures the accuracy of negative pressure value.
Further, water inlet pipe 1 in the present embodiment and be respectively connected with standard sebific duct outside fertilizer producing tube 6, in order to ensure the sealing effectiveness between two kinds of pipelines, the external diameter of water inlet pipe 1 and fertilizer producing tube 6 is all slightly less than the caliber of respective standard sebific duct, in order to install, easy to operate；Detailed, standard sebific duct is preferably four kinds of different sebific ducts of caliber, and its caliber respectively D20mm, D25mm, D32mm and D40mm, to strengthen the suitability inhaling fertile device.
Further, inhale fertile device and be externally provided with multiple for the solution pond equipped with the different units pure fertilizer of element, solution pond is connected with solution hole 8 by solution pipe, and the species number of the pure fertilizer of single element that the number in solution hole 8 is drawn as required chooses simultaneously, so that both quantity keep consistent, highly preferred less than inhaling in fertile chamber 7 vacuum section 11 relative to the height at least 50cm on ground relative to ground of solution face in solution pond, in order to ensure to inhale being smoothed out of fertile process；Meanwhile, this device to be accomplished to fully seal, and occurs without gas leakage drainage, it is to avoid inhales and cannot produce negative pressure in fertile chamber 7, and then causes that inhaling fertilizer is obstructed.
nullIn the present embodiment, the work process of the fertile device of combined type suction is: be individually positioned in different solution ponds by the required pure fertilizer of different types of single element，Solution pond is connected with solution hole 8 by solution pipe，Water is passed in water inlet pipe 1 from standard sebific duct，Current enter back in collapsible tube 2，Owing to the section of collapsible tube 2 is gradually reduced，The pressure of current increases，Water velocity also increases therewith，Current are flowed out by nozzle 3，And produce Negative Pressure Difference at vacuum section 11 place in the exit of nozzle 3，Solution in solution pond is drawn into vacuum section 11 place in fertile chamber 7 through solution hole 8 by this Negative Pressure Difference，Multiple solution collects with current herein and blends for the first time，Mixed solution enters into and carries out secondary mixing in mixing chamber 4，Fertilizer producing tube 6 is entered then through anemostat 5，The pressure of mixing solution reduces，Flow velocity also reduces therewith，Finally flow out from fertilizer producing tube 6 and be supplied to crops to apply fertilizer through standard sebific duct；Simultaneously, pressure vacuum gauge can measure the negative pressure value of vacuum section 11 in real time, effusion meter electromagnetic valve can be measured the fertilizer-sucting quantity by inhaling fertile hole 8 and control cut-offfing of fertilzer sucking pipe, effectively realizes real-time synchronization detection and inhales the suction fertilizer situation of the negative pressure of vacuum value in fertile chamber 7 and each fertilzer sucking pipe pipeline.
In sum, combined type provided by the invention inhales fertile device, inlet segment is connected by the fertile chamber of suction with going out fertile section, and by being provided with the fertile hole of multiple suction on the fertile chamber of suction, to realize being mixed with water by pure for multiple single element fertilizer and applying fertilizer simultaneously, inhaling fertile intracavity and be not susceptible to blocking, the level of integrated system of this device is high, take up room little, and be effectively improved fertilizer-sucting performance and reliability；Meanwhile, this device can also realize real-time synchronization detection and inhale the negative pressure value of fertile intracavity and the suction fertilizer situation of each fertilzer sucking pipe pipeline, finds to inhale the clogging of fertile intracavity in time, is effectively improved the mixing efficiency of liquid manure.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a combined type inhales fertile device, it is characterised in that includes inlet segment, inhale fertile chamber (7) and goes out fertile section, described inlet segment with described go out fertile section be connected by described suction fertilizer chamber (7)；
Described inlet segment includes the water inlet pipe (1) being sequentially communicated, collapsible tube (2) and nozzle (3), described nozzle (3) is positioned at the fertile chamber (7) of described suction, described go out fertile section include the mixing chamber (4) that is sequentially communicated, anemostat (5) and fertilizer producing tube (6), described mixing chamber (4) connects with described fertilizer chamber (7) of inhaling away from one end of described anemostat (5), described nozzle (3) and described mixing chamber (4) are oppositely arranged, described suction is provided with the fertile hole (8) of multiple suction on fertile chamber (7), multiple described fertilizer hole (8) of inhaling are for being drawn into pure for multiple single element fertilizer in fertile chamber (7) simultaneously.
2. combined type according to claim 1 inhales fertile device, it is characterised in that multiple described centers inhaling fertile hole (8) are evenly distributed on the circumference that same Radius is corresponding.
3. combined type according to claim 1 inhales fertile device, it is characterised in that the aperture of multiple fertile holes (8) of described suction is all equal.
4. combined type according to claim 1 inhales fertile device, it is characterized in that, described inlet segment is the first through hole (9) with the described connectivity part inhaling fertile chamber (7), described mixing chamber (4) is the second through hole (10) with the described connectivity part inhaling fertile chamber (7), and described first through hole (9) and the second through hole (10) are coaxially disposed.
5. combined type according to claim 4 inhales fertile device, it is characterized in that, the aperture of described first through hole (9) is equal away from one end outer diameter of water inlet pipe (1) with described inlet segment, and the aperture of described second through hole (10) is equal with the outer diameter of described mixing chamber (4).
6. combined type according to claim 1 inhales fertile device, described suction fertilizer chamber (7) be shaped as cylinder, spheroid or polygonal body.
7. combined type according to claim 1 inhales fertile device, it is characterised in that the cavity of described suction fertilizer chamber (7) is made up of polrvinyl chloride material.
8. combined type according to claim 1 inhales fertile device, it is characterised in that described inlet segment is revolving body with going out fertile section.
9. the combined type according to any one of claim 1-8 inhales fertile device, it is characterized in that, also include pressure vacuum gauge and effusion meter electromagnetic valve, described pressure vacuum gauge is used for measuring the negative pressure value inhaled in fertile chamber (7), and described effusion meter electromagnetic valve is passed into, for measuring and controlling, the fertilizer-sucting quantity inhaled in fertile chamber (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096434.5A CN105723908B (en) | 2016-02-22 | 2016-02-22 | A kind of combined type inhales fertile device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096434.5A CN105723908B (en) | 2016-02-22 | 2016-02-22 | A kind of combined type inhales fertile device |
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| CN105723908A true CN105723908A (en) | 2016-07-06 |
| CN105723908B CN105723908B (en) | 2018-01-02 |
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| CN201610096434.5A Active CN105723908B (en) | 2016-02-22 | 2016-02-22 | A kind of combined type inhales fertile device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108337981A (en) * | 2018-03-14 | 2018-07-31 | 中国水利水电科学研究院 | Development of Venturi Fertilizer Applicator and fertilizing equipment |
| CN109743944A (en) * | 2017-11-03 | 2019-05-14 | 中国农业大学 | A kind of heliogreenhouse liquid manure one intelligent control system and its method |
| CN114918052A (en) * | 2022-04-22 | 2022-08-19 | 江苏大学 | Sprinkling irrigation nozzle based on Venturi principle |
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| CN2595137Y (en) * | 2003-02-21 | 2003-12-31 | 天津市水利科学研究所 | Wenturi fertilizer injector with one-way valve |
| DE102007039371A1 (en) * | 2007-08-14 | 2009-02-19 | Gardena Manufacturing Gmbh | Fertilizer tank for mixer for mixing liquid fertilizer and carrier liquid has annular section which contains fertilizer and has outlets in its upper wall, through which it flows |
| CN203874685U (en) * | 2014-05-22 | 2014-10-15 | 西安交通大学 | Novel Venturi mixer containing special guiding pipes at throat part |
| CN104969708A (en) * | 2015-07-01 | 2015-10-14 | 昆明理工大学 | Variable irrigating fertilizing device, and control method thereof |
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2016
- 2016-02-22 CN CN201610096434.5A patent/CN105723908B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2595137Y (en) * | 2003-02-21 | 2003-12-31 | 天津市水利科学研究所 | Wenturi fertilizer injector with one-way valve |
| DE102007039371A1 (en) * | 2007-08-14 | 2009-02-19 | Gardena Manufacturing Gmbh | Fertilizer tank for mixer for mixing liquid fertilizer and carrier liquid has annular section which contains fertilizer and has outlets in its upper wall, through which it flows |
| CN203874685U (en) * | 2014-05-22 | 2014-10-15 | 西安交通大学 | Novel Venturi mixer containing special guiding pipes at throat part |
| CN104969708A (en) * | 2015-07-01 | 2015-10-14 | 昆明理工大学 | Variable irrigating fertilizing device, and control method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109743944A (en) * | 2017-11-03 | 2019-05-14 | 中国农业大学 | A kind of heliogreenhouse liquid manure one intelligent control system and its method |
| CN108337981A (en) * | 2018-03-14 | 2018-07-31 | 中国水利水电科学研究院 | Development of Venturi Fertilizer Applicator and fertilizing equipment |
| CN108337981B (en) * | 2018-03-14 | 2023-09-12 | 中国水利水电科学研究院 | Venturi fertilizer applicator and fertilizer application equipment |
| CN114918052A (en) * | 2022-04-22 | 2022-08-19 | 江苏大学 | Sprinkling irrigation nozzle based on Venturi principle |
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| CN105723908B (en) | 2018-01-02 |
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