CN113141844B - Special intelligent irrigation device of green house - Google Patents
Special intelligent irrigation device of green house Download PDFInfo
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- CN113141844B CN113141844B CN202110423714.3A CN202110423714A CN113141844B CN 113141844 B CN113141844 B CN 113141844B CN 202110423714 A CN202110423714 A CN 202110423714A CN 113141844 B CN113141844 B CN 113141844B
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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
- A01C23/047—Spraying of liquid fertilisers
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- 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
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Abstract
The invention discloses a special intelligent water conservancy irrigation device for an agricultural greenhouse, which comprises a device main body, an irrigation device and a water tank, wherein the top of the device main body is fixedly connected with the irrigation device, the inner bottom of the irrigation device is fixedly connected with a water storage tank, two sides of the surface of the water storage tank are fixedly connected with support plates, the middle part of the top of the irrigation device is fixedly connected with a drying cavity, the middle part of the inner top of the drying cavity is fixedly connected with a purifier, one side of the bottom of the purifier is fixedly connected with a driving motor, two sides of the bottom of the device main body are fixedly connected with a moving structure, a water storage purification mechanism is used for maintaining a water source stored in advance, the pollution to the water source is avoided, a multifunctional fertilization mechanism is used for multiple effects through the device, certain labor force for manual fertilization and irrigation is relieved, the irrigation mechanism is prolonged, the effective convenience of the device can be used for adjusting irrigation according to the actual field range, the requirement adjustment and control of workers are met, and the use flexibility of the device is improved better.
Description
Technical Field
The invention relates to the technical field of water conservancy irrigation, in particular to an intelligent water conservancy irrigation device special for an agricultural greenhouse.
Background
At present, manual irrigation is adopted in a common agricultural greenhouse, the dryness and wetness degree of crops is mostly judged by experience, the mechanization level is low, the height of irrigation equipment cannot be adjusted, the heights of the crops are different from a plant seedling stage to a mature stage, and the irrigation equipment cannot be adjusted according to the growth condition of the plants.
Because in traditional device, the function singleness of device, in the use operation of reality, have certain limitation, can not carry out the regulation of length according to the place scope of reality, the water source of depositing inside simultaneously can not disinfect and purify, leads to in the inside water quality of device to reduce, influences the irrigation nutrition to the plant in later stage, reduces the device's use probability.
Disclosure of Invention
The invention aims to provide an intelligent irrigation device special for an agricultural greenhouse, which aims to solve the problems that the function provided by the background technology is single, the length cannot be adjusted according to the actual field range, the practicability is low and the like.
In order to achieve the purpose, the invention provides the following technical scheme: special intelligent irrigation device of green house, including device main part, irrigation equipment and water tank, at first, the top fixedly connected with irrigation equipment of device main part, irrigation equipment's surperficial middle part through connection has the middle chamber, irrigation equipment's top fixedly connected with water tank, wherein:
the bottom inside the irrigation device is fixedly connected with a water storage tank, two sides of the surface of the water storage tank are fixedly connected with support plates, the middle part of the top of the irrigation device is fixedly connected with a drying cavity, the middle part of the top inside the drying cavity is fixedly connected with a purifier, one side of the bottom of the purifier is fixedly connected with a driving motor, and two sides of the bottom of the device main body are fixedly connected with a moving structure;
a storage cavity is fixedly connected inside the middle cavity, a flow pipe penetrates through the storage cavity, first extension pipes are connected to two sides of the flow pipe in a nested manner, and a fertilizing nozzle is connected to one side of the bottom of the flow pipe in an embedded manner;
the utility model discloses a water tank, including the inside both sides fixedly connected with of water tank, the top of water tank is inserted in the valve and is connected with the valve, the surperficial nested connection of second extension pipe has the inner tube, the inside swing joint of inner tube has embedded pole, the inside both sides embedding of inner tube is connected with embedded track, the inside one side fixedly connected with extension spring of embedded track, the both sides swing joint of embedded pole has the removal gear, the inside one side fixedly connected with of embedded pole connects the plate.
Preferably, one side of the top of the inside of the device main body is fixedly connected with a shock pad, the bottom of the shock pad is fixedly connected with four buffer springs, the cross sections of the left and right distributed shock pads are long rectangles, and the cross sections of the left and right distributed shock pads are matched with the inner wall of the top of the device main body in size.
Preferably, the embedding of surface one side of inner tube is connected with irrigates the chamber, irrigate the inside bottom fixedly connected with filter in chamber, the filter cross-section is the rectangle, and it is identical to irrigate intracavity wall constitution size.
Preferably, the bottom embedding in irrigation chamber is connected with sprays the filtration mouth, the inside top fixedly connected with sponge net that sprays the filtration mouth constitutes the size and coincide, and the sponge net cross-section is "half arc" shape, sprays the filtration mouth cross-section and is fillet rectangle form.
Preferably, the water storage purification mechanism is composed of the water storage tank at the bottom inside the irrigation device, the support plates on two sides of the surface of the water storage tank, the drying cavity in the middle of the top of the irrigation device, the purifier in the middle of the top inside the drying cavity and the driving motor on one side of the bottom of the purifier.
Preferably, the storage cavity in the middle cavity, the flow pipe in the storage cavity, the first extension pipes on two sides of the flow pipe and the fertilizing spray head on one side of the bottom of the flow pipe jointly form a multifunctional fertilizing mechanism.
Preferably, the extension irrigation mechanism is composed of the second extension pipes on two sides inside the water tank, the valve on one side of the top of the water tank, the inner pipe on the surface of the second extension pipe, the embedded rod inside the inner pipe, the embedded tracks on two sides inside the inner pipe, the extension spring on one side inside the embedded tracks, the moving gears on two sides of the embedded rod and the connecting plate on one side inside the embedded rod.
Compared with the prior art, the invention has the beneficial effects that:
(1) The intelligent irrigation device special for the agricultural greenhouse comprises a water storage purification mechanism, a water storage tank inside the irrigation device stores water, the water is effectively supplied after water problems appear in the later period, a drying cavity is arranged inside the irrigation device, the installation of a multifunctional element is effectively facilitated, the flexible assistance of the device is further met, the element which is prevented from being corroded by water flow, a purifier is arranged inside the drying cavity, a water source which is stored in advance is effectively maintained, the pollution of the water source is avoided, meanwhile, a driving motor on one side supports and drives electric power, and the actual operation of the multifunctional element is facilitated;
(2) The intelligent irrigation device special for the agricultural greenhouse is characterized in that a middle cavity is arranged in the middle of the device through a multifunctional fertilizing mechanism, fertilizers are placed in the middle cavity and stored in the middle cavity, circulation of the fertilizers is carried out through an internal circulation pipe, a fertilizing spray head on one side can conveniently carry out supply type fertilization, the length can be adjusted and fertilized through a first extension pipe according to actual field requirements, the multifunctional practicability of the device is further improved, multiple effects are further used through the device, and certain labor force of manual fertilization and irrigation is relieved;
(3) The intelligent irrigation device special for the agricultural greenhouse can adjust irrigation according to actual field range through the extension irrigation mechanism, requirements of workers on demand adjustment control are met, the use flexibility of the device is better improved, second extension pipes are arranged on two sides of the water tank, space is reserved for the extension structure through the inner pipe, an embedded rod is arranged inside the inner pipe, sliding of length is conducted through a moving gear, adjustment and extension effects are achieved, an extension spring is arranged on one side inside the embedded track, the inner pipe is not affected by inertia after extension is conducted, recycling is facilitated, electric driving is conducted through a driving motor, gear moving is facilitated, and convenience of the device is improved;
(4) The intelligent irrigation device special for the agricultural greenhouse is used for controlling and maintaining the whole device by arranging the shock absorption pads and the buffer springs, so that the influence of uncertain factors on the device in the moving process is relieved, and the service life of internal elements of the device is maintained;
(5) According to the intelligent irrigation device special for the agricultural greenhouse, the water flow is filtered and sprayed through the internal filter plate of the irrigation cavity, so that the sprayed water quality is improved, plants are better irrigated, and the impact of the water flow is avoided;
(6) This special intelligent irrigation device of green house carries out the strong filtration to the rivers through the inside sponge net of spraying filter orifice, and the convenient for people receives the jam because of the impurity in the rivers, influences the availability factor effect in its later stage, maintains the life of sprinkler head.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic cross-sectional view of the apparatus of the present invention;
FIG. 3 is a schematic sectional view of the structure of the embedded rod of the present invention;
FIG. 4 is an enlarged view of the structure at A of the present invention;
fig. 5 is an enlarged schematic view of the structure at B of the present invention.
In the figure: 1. a device main body; 101. a moving structure; 102. a shock pad; 103. a buffer spring; 2. an irrigation device; 201. a water storage tank; 202. a mounting plate; 203. a purifier; 204. a drive motor; 205. a drying chamber; 3. a middle cavity; 301. a first extension pipe; 302. a storage chamber; 303. a flow tube; 304. a fertilizing nozzle; 4. a water tank; 401. a valve; 402. a second extension pipe; 403. an inner tube; 404. an irrigation cavity; 405. a filter plate; 406. a sponge web; 407. spraying a filter opening; 5. embedding a track; 501. a rod is embedded; 502. connecting the plates; 503. an extension spring; 504. the gear is moved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the intelligent irrigation device special for the agricultural greenhouse comprises a device body 1, a moving structure 101, a shock absorption pad 102, a buffer spring 103, an irrigation device 2, a water storage tank 201, a support plate 202, a purifier 203, a driving motor 204, a drying cavity 205, a middle cavity 3, a first extension pipe 301, a storage cavity 302, a flow pipe 303, a fertilizing sprayer 304, a water tank 4, a valve 401, a second extension pipe 402, an inner pipe 403, an irrigation cavity 404, a filter plate 405, a sponge net 406, a spraying filter hole 407, an embedded track 5, an embedded rod 501, a connecting plate block 502, a tension spring 503 and a moving gear 504; the top fixedly connected with irrigation equipment 2 of device main part 1, irrigation equipment 2's surperficial middle part through connection has middle chamber 3, irrigation equipment 2's top fixedly connected with water tank 4, wherein:
the damping pad 102 is fixedly connected to one side of the top of the interior of the device body 1, the damping springs 103 are fixedly connected to the bottom of the damping pad 102, the number of the damping springs 103 is four, the cross sections of the damping pads 102 distributed on the left and right are long rectangles, the cross sections of the damping pads 102 are matched with the size of the inner wall of the top of the device body 1, the damping pads 102 and the damping springs 103 are arranged to control and maintain the whole device, the influence of uncertain factors on the device in the moving process is relieved, and the service life of internal elements of the device is maintained; an irrigation cavity 404 is embedded and connected to one side of the surface of the inner pipe 403, a filter plate 405 is fixedly connected to the bottom inside the irrigation cavity 404, the cross section of the filter plate 405 is rectangular and is matched with the inner wall of the irrigation cavity 404 in size, and water flow is filtered and sprayed through the filter plate 405 inside the irrigation cavity 404, so that the sprayed water quality is improved, plants are better irrigated conveniently, and the water flow impact is avoided; the bottom embedding of irrigation chamber 404 is connected with sprays filter opening 407, the inside top fixedly connected with sponge net 406 that sprays filter opening 407 constitutes the size and coincide, and sponge net 406 cross-section is "semi-arc" shape, sprays filter opening 407 cross-section and is fillet rectangle form, carries out the strong effect of filtering the rivers through spraying the inside sponge net 406 of filter opening 407, and the convenience of customers influences the availability factor effect in its later stage because of the impurity in the rivers receives the jam, maintains the life of sprinkler head.
Preferably, the water storage tank 201 of the inside bottom of irrigation equipment 2, the mounting panel 202 of water storage tank 201 surface both sides, the dry chamber 205 of 2 top middle parts of irrigation equipment, the clarifier 203 of the inside top middle part of dry chamber 205, the water purification mechanism that holds is constituteed jointly to the driving motor 204 of clarifier 203 bottom one side, purify the mechanism through holding, carry out the storage to the water yield at the inside water storage tank 201 of irrigation equipment 2, the effectual later stage of being convenient for carries out the water yield supply after the water yield problem appears, internally mounted has dry chamber 205 simultaneously, the effectual installation to the multifunctional component of being convenient for, and then satisfy the nimble of device supplementary, the component of avoiding installing receives the erosion of rivers, internally mounted has clarifier 203 at dry chamber 205, the effectual water source of depositing in advance of going on maintaining, avoid the pollution at the water source, the driving motor 204 of one side carries out the support drive of electric power simultaneously, be convenient for install the actual operation of multifunctional component.
Preferably, 3 inside chambeies 302 of depositing of middle chamber, deposit the inside mobile pipe 303 in chamber 302, the first extension pipe 301 of mobile pipe 303 both sides, multi-functional fertilizing mechanism is constituteed jointly to the fertilization shower nozzle 304 of mobile pipe 303 bottom one side, through multi-functional fertilizing mechanism, install middle chamber 3 in the middle of the device, place and deposit chamber 302 with fertilizer, the circulation to fertilizer is carried out through inside mobile pipe 303, it carries out the fertilization of replenishment to be convenient for one side fertilization shower nozzle 304, can carry out the regulation fertilization of length according to actual place needs through first extension pipe 301, and then improve the multi-functional practicality of device, and then carry out the use of many effects through the device, alleviate the labour of certain manual fertilization irrigation.
Preferably, the second extension pipe 402 on two sides inside the water tank 4, the valve 401 on one side of the top of the water tank 4, the inner pipe 403 on the surface of the second extension pipe 402, the embedded rod 501 inside the inner pipe 403, the embedded track 5 on two sides inside the inner pipe 403, the extension spring 503 on one side inside the embedded track 5, the movable gear 504 on two sides of the embedded rod 501, the connection plate 502 on one side inside the embedded rod 501 jointly forms an extension irrigation mechanism, through the extension irrigation mechanism, irrigation can be adjusted according to the actual field range effectively, it is satisfied that the workers carry out demand adjustment control, better flexibility of use of the device is improved, the second extension pipe 402 is arranged on two sides of the water tank 4, space is reserved for the extension structure through embedding of the inner pipe, the rod 501 is arranged inside the inner pipe 403, length sliding is carried out through the movable gear 504, the extension effect is adjusted, the extension spring 503 is installed on one side inside the embedded track 5, the inner pipe 403 is not influenced by inertia after extension, recycling is facilitated, electric drive is carried out through the driving motor, and convenience of the device is improved.
The working principle is as follows: the shock absorption device is characterized in that the shock absorption pad 102 and the buffer spring 103 are arranged to control and maintain the whole device, the influence of uncertain factors on the whole device in the moving process is relieved, the service life of internal elements of the device is maintained, water flow is filtered and sprayed through the internal filter plate 405 of the irrigation cavity 404, the sprayed water quality is improved conveniently, better irrigation on plants is facilitated, the impact of the water flow is avoided, the water flow is filtered strongly through the sponge net 406 in the spraying filter opening 407, the later-stage use efficiency effect is influenced because impurities in the water flow are blocked for convenience of people, the service life of the spraying head is maintained, the water storage is carried out in the water storage tank 201 in the irrigation device 2 through the water storage purification mechanism, the water quantity is effectively supplied after the water quantity problem occurs in the later stage, meanwhile, the drying cavity 205 is arranged inside the device, and the installation of multifunctional elements is effectively facilitated, thereby satisfying the flexible assistance of the device, avoiding the installed elements from being eroded by water flow, installing a purifier 203 in the drying cavity 205, effectively maintaining the water source stored in advance, avoiding the pollution of the water source, simultaneously, supporting and driving the electric power by the driving motor 204 at one side, facilitating the actual operation of the multifunctional elements of the device, installing a middle cavity 3 in the middle of the device through a multifunctional fertilizing mechanism, placing and storing fertilizer in a cavity 302, circulating the fertilizer through an internal flow pipe 303, facilitating the replenishment fertilization of a fertilizing spray head 304 at one side, adjusting the fertilization according to the actual field requirement through a first extension pipe 301, further improving the multifunctional practicability of the device, further using multiple effects through the device, relieving certain labor force of manual fertilization and irrigation, and through an extension irrigation mechanism, irrigation can be adjusted according to the place scope of reality to effectual device of being convenient for, satisfy and carry out demand regulation control in the staff, better improvement device's use flexibility ratio, there is second extension pipe 402 in the both sides of water tank 4, go on to leave the space to the extension structure through inner tube 403, and there is embedded pole 501 inner tube 403 inside, carry out the slip of length through removing gear 504, adjust the extension effect, and extension spring 503 is installed to inside one side of embedded track 5, inner tube 403 is convenient for not receive inertial influence after the extension, be convenient for retrieve, it is convenient for remove gear 504 activity to carry out electric drive through driving motor, the convenience of improvement device, the content that does not make detailed description in this description belongs to the known prior art of the professional skilled in the art in the field.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (7)
1. Special intelligent irrigation device of green house, including device main part (1), irrigation equipment (2) and water tank (4), its characterized in that: the top fixedly connected with irrigation equipment (2) of device main part (1), the surperficial middle part through connection of irrigation equipment (2) has middle chamber (3), the top fixedly connected with water tank (4) of irrigation equipment (2), wherein:
the water storage tank (201) is fixedly connected to the inner bottom of the irrigation device (2), support plates (202) are fixedly connected to two sides of the surface of the water storage tank (201), the drying cavity (205) is fixedly connected to the middle of the top of the irrigation device (2), the purifier (203) is fixedly connected to the middle of the inner top of the drying cavity (205), the driving motor (204) is fixedly connected to one side of the bottom of the purifier (203), and the moving structure (101) is fixedly connected to two sides of the bottom of the device main body (1);
a storage cavity (302) is fixedly connected to the inside of the middle cavity (3), a flow pipe (303) penetrates through the inside of the storage cavity (302), first extension pipes (301) are connected to two sides of the flow pipe (303) in a nested manner, and a fertilization nozzle (304) is embedded and connected to one side of the bottom of the flow pipe (303);
the utility model discloses a water tank, including the inside both sides fixedly connected with of water tank (4) extension pipe (402), the top one side embedding of water tank (4) is connected with valve (401), the surperficial nested connection of second extension pipe (402) has inner tube (403), the inside swing joint of inner tube (403) has embedded pole (501), the inside both sides embedding of inner tube (403) is connected with embedded track (5), inside one side fixedly connected with extension spring (503) of embedded track (5), the both sides swing joint of embedded pole (501) has mobile gear (504), inside one side fixedly connected with of embedded pole (501) connects plate (502).
2. The special intelligent irrigation device for agricultural greenhouses according to claim 1, which is characterized in that: the damping pad (102) is fixedly connected to one side of the top of the inner portion of the device body (1), the damping springs (103) are fixedly connected to the bottom of the damping pad (102), the number of the damping springs (103) is four, the cross sections of the damping pads (102) distributed on the left and the right are long rectangles, and the cross sections of the damping pads (102) are matched with the inner wall of the top of the device body (1) in size.
3. The special intelligent irrigation device for agricultural greenhouses according to claim 1, which is characterized in that: the embedding of surface one side of inner tube (403) is connected with irrigates chamber (404), irrigate the inside bottom fixedly connected with filter (405) in chamber (404), filter (405) cross-section is the rectangle, constitutes the size with irrigate chamber (404) inner wall and coincide.
4. The special intelligent irrigation device for agricultural greenhouses according to claim 3, wherein: the bottom of the irrigation cavity (404) is embedded and connected with a spraying filter hole (407), the top of the inside of the spraying filter hole (407) is fixedly connected with a sponge net (406) to form a size fit, the cross section of the sponge net (406) is in a semi-arc shape, and the cross section of the spraying filter hole (407) is in a round corner rectangular shape.
5. The special intelligent irrigation device for agricultural greenhouses according to claim 1, which is characterized in that: the water storage and purification device is characterized in that a water storage tank (201) at the bottom inside the irrigation device (2), support plates (202) on two sides of the surface of the water storage tank (201), a drying cavity (205) in the middle of the top of the irrigation device (2), a purifier (203) in the middle of the top inside the drying cavity (205), and a water storage and purification mechanism are formed by a driving motor (204) on one side of the bottom of the purifier (203).
6. The special intelligent irrigation device for agricultural greenhouses according to claim 1, which is characterized in that: the multifunctional fertilizing mechanism comprises a storage cavity (302) inside the middle cavity (3), a flow pipe (303) inside the storage cavity (302), first extension pipes (301) on two sides of the flow pipe (303), and a fertilizing sprayer (304) on one side of the bottom of the flow pipe (303).
7. The special intelligent irrigation device for agricultural greenhouses according to claim 1, which is characterized in that: the extension irrigation mechanism is composed of a second extension pipe (402) on two sides of the inside of the water tank (4), a valve (401) on one side of the top of the water tank (4), an inner pipe (403) on the surface of the second extension pipe (402), an inner embedded rod (501) inside the inner pipe (403), embedded tracks (5) on two sides of the inside of the inner pipe (403), a tension spring (503) on one side of the inside of the embedded track (5), moving gears (504) on two sides of the embedded rod (501), and a connecting plate block (502) on one side of the inside of the embedded rod (501).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110423714.3A CN113141844B (en) | 2021-04-20 | 2021-04-20 | Special intelligent irrigation device of green house |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110423714.3A CN113141844B (en) | 2021-04-20 | 2021-04-20 | Special intelligent irrigation device of green house |
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| CN113141844A CN113141844A (en) | 2021-07-23 |
| CN113141844B true CN113141844B (en) | 2023-03-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE20009080U1 (en) * | 2000-05-19 | 2000-09-07 | Riegger Lorenz | Tool for plant growing |
| US10694683B2 (en) * | 2017-05-20 | 2020-06-30 | Insectergy, Llc | Cannabis farming systems and methods |
| CN206909133U (en) * | 2017-07-24 | 2018-01-23 | 史华林 | A kind of portable sprinkler of mushroom plantation |
| CN108496507A (en) * | 2018-05-24 | 2018-09-07 | 华南理工大学 | A kind of intelligent irrigation fertilizer apparatus and method using solar energy and non-traditional water source |
| CN110313293A (en) * | 2019-08-09 | 2019-10-11 | 赵少芹 | A kind of Tea planting fertilizer irrigation device |
| CN210746493U (en) * | 2019-09-30 | 2020-06-16 | 朱江龙 | Gardens retaining and automatic irrigation equipment |
| CN212013897U (en) * | 2019-12-18 | 2020-11-27 | 江西普瑞丰生态科技有限公司 | Intelligence farmland irrigation water source clarification plant |
| CN212034845U (en) * | 2020-04-02 | 2020-12-01 | 河海大学 | Agricultural irrigation fertilizer injection unit |
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