CN102389866B - Backwash-type fountain root-irrigation irrigator - Google Patents
Backwash-type fountain root-irrigation irrigator Download PDFInfo
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- CN102389866B CN102389866B CN2011102045588A CN201110204558A CN102389866B CN 102389866 B CN102389866 B CN 102389866B CN 2011102045588 A CN2011102045588 A CN 2011102045588A CN 201110204558 A CN201110204558 A CN 201110204558A CN 102389866 B CN102389866 B CN 102389866B
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Abstract
The invention discloses a backwash-type fountain root-irrigation irrigator, which is formed by combining a cover with a core of the irrigator through a thread, wherein the center above the cover is provided with a water inlet; ventilation water guide holes are distributed around the cover; the core of the irrigator is a hollow circular tube with a partition plate; helical tooth labyrinth channels are distributed on the outer wall of the circular tube; the helical tooth labyrinth channels are provided with a filter screen and a water outlet; the partition plate is arranged between the filter screen and the water outlet; and the upper end and the lower end of the circular tube are provided with external threads matched with the cover. Under the normal condition, the cover is in driving fit with the thread of the upper end of the core of the irrigator; water flow enters the interior of the core from the water inlet, enters the helical tooth labyrinth channels after being filtered through the filter screen for energy dissipation, and outflows from the core through the water outlet. When the irrigator is blocked, the core of the irrigator is inverted, and the cover is screwed down with the thread of the lower end of the irrigator, thus, the water flow inflows from the water outlet to wash out the channels, and outflows from the filter screen to perform a backwash function.
Description
Technical field
The invention belongs to agricultural economy woods irrigation technique field, drought-hit area, relate to a kind of fountain root irrigation machine, particularly a kind of backwash-type fountain root-irrigation irrigator.
Background technology
When greatly developing modern water-saving irrigation, it is widely acknowledged, sub-irrigation (as sub-irrigation and drip irrigation) is the technology of water-saving, but the blockage problem of douche is to hinder the maximum bottleneck of drip irrigation technique application and development always.Press the plugging reason classification, have the physical clogging that is caused by solid particle, the caused chemistry of indissoluble salt that is generated by chemical reaction to stop up and stopped up by the biology that microbial activities and growth cause.There are some researches show, the immediate cause that douche stops up is migration rule and the deposition characteristics of various forms blocking medium in douche slight curves runner, even if fully utilize various physico-chemical processes, processes, and the douche runner stops up and still can't eliminate.In order to prevent the obstruction of douche, except water quality is processed, improve outside the douche flow passage structure, design a kind of structure that can rinse the douche runner, be also to improve douche to stop up one of effective approach.
The applicant, in research process, has submitted following patent application to national patent administrative department respectively:
1, a kind of root-irrigation method of underground artesian spring (application number: 200810150395.8) that is applicable to trees, the new ideas of spring root irrigation have been proposed, and made a kind of simple assistant's douche, the water that will be flowed out by the microtubule that diameter is 4mm imports crop root via assistant's douche, not only overcome the shortcoming of ground and underground drip irrigation mode, hollow billet is increased to 20 years by 5-8 service life, and moisture is directly added to the crop root position, realization is changed to irrigated crop by irrigation soils, reduced the obstruction of evaporation from land and douche, improved the utilization ratio of pouring water, also do not form at that time a kind of spring root irrigation product truly.
2, a kind of threaded labyrinth flow channel type formula fountain root irrigation machine (application number: 201010156199.9), screw-type labyrinth flow-path, water inlet, flushing sluice and ventilation water guide mouth are integrated in one, the soil that is applicable to various different soil properties carries out spring root irrigation, when soil water permeability is strong, water by delivery port all infiltrates, when soil water permeability is poor, the water that has little time to infiltrate flows out to enter by the ventilation aqueduct and oozes pond, reaching thus two kinds of irrigation methods combines, to guarantee that moisture all enters crop root, the irrigation water utilization ratio is high.The long discharge section area of inner douche runner is large, threaded labyrinth runner center line overall length 1500mm, minimum widith are 2mm, and in the past labyrinth flow-path water dropper minimum widith at 0.5-1.2mm, runner center line overall length is in the 100mm left and right, threaded labyrinth runner flow stance index is less than 0.5, and energy dissipating and turbulent flow are effective.It is simple in structure, has the characteristics of root filling and spring; With the pipeline that is exposed to ground, compare, brought up to more than 20 years service life by 3-5, and cost reduces more than 20%.
3, a kind of adjustable-pressure fountain root irrigation machine (application number: 201010156210.1), this adjustable-pressure fountain root irrigation machine comprises a pipe, the circular ring type labyrinth flow-path is arranged on the tube wall of pipe, water inlet, sand discharge hole and ventilation water guide mouth are arranged on pipe, in water inlet and sand discharge hole, screen pack is arranged, water inlet and the import of circular ring type labyrinth flow-path are connected, and at the circular ring type labyrinth flow-path, are distributed with low pressure delivery mouth, the middle extrusion mouth of a river and the high-pressure outlet of being regulated the rubber ring sealing by pressure.Its runner is long and discharge section area is large, runner main channel minimum widith is 2mm, rotation pressure is regulated rubber ring, make the delivery port of pressure adjusting rubber ring circular hole and a certain position overlapping, just can open needed pressure water mouth, and then realize that same douche obtains the effect of same traffic under different pressures.
4, a kind of helical teeth labyrinth flow-path fountain root irrigation machine (application number: 201010208686.5), this helical labyrinth wide, comprise: the pipe at the bottom of a hollow belt, the wide runner in helical teeth labyrinth is arranged on the outer tube wall of pipe, water inlet and ventilation water guide mouth are arranged at pipe top, in water inlet, be provided with the runner intake screen, water inlet is connected by the wide runner of runner import and helical teeth labyrinth, in described flow field end, be provided with slow pool, stay pool and delivery port, described flow field end is communicated with by runner exit and described slow pool, He Zhu pool, slow pool is communicated with, the internal cavities of described pipe at the bottom of pool is by described hollow belt forms, the bottom of described pipe arranges mesh and forms delivery port.Its flow is large, performance of anti-blockage is high.
Above-mentioned fountain root irrigation machine has all adopted integral structure, and the douche runner is optimized to design, and with douches such as existing water dropper, flow straighteners, compare, significantly strengthened performance of anti-blockage, but these douches still have the possibility of obstruction in use procedure.Therefore, for the blockage problem that solves fountain root irrigation machine, remain that those skilled in the art pay close attention to.
Summary of the invention
In order to solve the blockage problem of douche, the object of the invention is to, a kind of backwash-type fountain root-irrigation irrigator is provided, this douche adopts fabricated structure, when douche occurs to stop up, current are entered from former delivery port, wash away in runner and entery and delivery port place and stop up material, avoid the replacing of douche, reduced the irrigation system cost.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of backwash-type fountain root-irrigation irrigator, is characterized in that, by lid and douche core, by screw thread, combined; Described lid top center has water inlet, around lid, be distributed with the ventilation water-guiding hole, described douche core is the pipe of a hollow belt dividing plate, on circular tube external wall, be distributed with the helical teeth labyrinth flow-path, filter screen and delivery port are arranged on the helical teeth labyrinth flow-path, described dividing plate is arranged between filter screen and delivery port, and there is the external screw thread that matches with lid at two ends, pipe up and down.
Backwash-type fountain root-irrigation irrigator of the present invention, also comprise a matching used sleeve, and described sleeve two ends are penetrating, and sleeve diameter equals the external diameter of lid, and the douche core is inserted in sleeve, and integral body is embedded in underground use.Avoid root intrusion and negative pressure to inhale mud, reduce the generation of stopping up.
Backwash-type fountain root-irrigation irrigator of the present invention, micro-irrigation emitter different from the past, adopt fabricated structure, and water inlet and ventilation water guide mouth are on lid, filter screen, helical teeth labyrinth flow-path, delivery port, dividing plate are on the douche core, and lid is connected by screw with core.Its fabricated structure and dividing plate are the keys of this douche backwashing function.The soil that this backwash-type fountain root-irrigation irrigator goes for different soil properties carries out spring root irrigation, when soil water permeability is strong, water by delivery port all infiltrates, when soil water permeability is poor, near the water that has little time to infiltrate entered by the outflow of ventilation aqueduct, soil continued to infiltrate, characteristics with root filling and spring, to guarantee that moisture all enters crop root, the irrigation water utilization ratio is high, simple in structure, hydraulic performance is good, and the runner anti-clogging is good, and have backwashing function, can avoid changing the cost rising that douche causes.It is underground that this backwash-type fountain root-irrigation irrigator can make pipeline all be embedded in, and with being exposed to surface duct, compares, and greatly improve service life.
The accompanying drawing explanation
Fig. 1 is backwash-type fountain root-irrigation irrigator structural representation of the present invention; Wherein, Fig. 1 a is decomposing schematic representation, and Fig. 1 b is whole profile.Being labeled as in figure: 1, lid, 2, the douche core, 3, water inlet, 4, the ventilation water-guiding hole, 5, water-stop sheet, 6, runner, 7, filter screen, 8, delivery port, 9, the external screw thread on the douche core, 10, the internal thread on lid.
Fig. 2 is backwash-type fountain root-irrigation irrigator backwash principle schematic of the present invention.
Fig. 3 is backwash-type fountain root-irrigation irrigator pressure flow graph of relation of the present invention, and wherein abscissa is pressure (m), and ordinate is flow (L/h).
Fig. 4 is the flowpath pressure distribution map.
Fig. 5 is the runner speed vector figure, and Fig. 5 a is the bulk velocity distribution map, and Fig. 5 b is the local hodograph that amplifies.
The specific embodiment that provides below in conjunction with accompanying drawing and inventor is described in further detail the present invention.
The specific embodiment
As Fig. 1, the present embodiment provides a kind of backwash-type fountain root-irrigation irrigator, and this douche is fabricated structure, comprises lid 1, douche core 2.Lid 1 and douche 2 cores are together by a threaded connection, and the top center of lid 1 has water inlet 3, and 2 ventilation water-guiding holes 4 are arranged around lid 1.Douche core 2 is pipes of a hollow belt dividing plate 5, on circular tube external wall, is distributed with helical teeth labyrinth flow-path 6, filter screen 7, and delivery port 8, dividing plate 5 are between filter screen 7 and delivery port 8, and the pipe upper and lower side has the screw thread 9 that matches with lid 1.
As shown in Figure 2, the backwash-type fountain root-irrigation irrigator operation principle of the present embodiment is: under normal circumstances, the threaded closure of the upper end of lid 1 and douche core 2, current enter the inside of douche core 2 from water inlet 1, existence due to water-stop sheet 5, current enter 6 energy dissipatings of helical teeth labyrinth flow-path after filter screen 7 filters, by delivery port 8 from the interior outflow of douche core 2.When backwash-type fountain root-irrigation irrigator occurs to stop up, douche core 2 to be inverted, lid 1 is tightened with the screw thread of douche core 2 lower ends, and current flow into and wash away helical teeth labyrinth flow-path 6 from delivery port 8, from filter screen 7, flow out, and play backwashing function.In actual use, near unnecessary current can import by ventilation water-guiding hole 4, soil continued to irrigate.
Described douche runner is the oblique tooth-shaped labyrinth flow-path, and the runner total length is 306mm, and the runner beam overall is 3.5mm, tooth depth 1mm, space width 3.8mm, the dark 2mm of runner.When pressure was 10m, the flow of delivery port 8 was 7L/h.This oblique tooth-shaped labyrinth flow-path cross-section of river is large, can effectively reduce the probability of happening of obstruction.
In the present embodiment, the length of douche core 2 is 78mm, external diameter 32.5mm, and wall thickness 3.2mm, be enclosed with the plastic peel that a layer thickness is 2mm in addition on douche core 2 outer walls.
Oblique tooth-shaped labyrinth flow-path 6 total lengths are 306mm, and the runner beam overall is 3.5mm, tooth depth 1mm, space width 3.8mm, the dark 2mm of runner.
The screw thread at douche core two ends Shang Xia 2 is identical, and pitch is 2.6mm, and the pitch cross section is square.
The thickness of dividing plate 5 is 3mm, and due to the iris action of dividing plate 5, after current were entered by water inlet 8, water level was raised, and from filter screen 7, enters oblique tooth-shaped labyrinth flow-path 6.
The external diameter of lid 1 is 50mm, and microtubule is connected 2 ventilation water-guiding holes 4 for diameter, being 4mm.
Backwash-type fountain root-irrigation irrigator of the present invention, also comprise a matching used sleeve (not shown), these sleeve two ends are penetrating, sleeve diameter equals lid 1 external diameter (50mm), the douche core of back flush type spring root irrigation 2 is inserted in this sleeve, integral body is embedded in underground use, avoids root intrusion and negative pressure to inhale mud, reduces the generation of stopping up.
The applicant adopts CFD analysis software Fluent, oblique tooth-shaped labyrinth flow-path 6 to the back flush type spring root irrigation carries out the single-phase flow analytical calculation, obtain the flow of helical teeth labyrinth flow-path 6 under different pressures, and its pressure flow relation curve of match as shown in Figure 3, the flow stance index of this helical teeth labyrinth flow-path 6 is 0.516, illustrates that current are in turbulent condition, and effect of energy dissipation is good, when rated pressure was 10m, flow was 7L/h.
Referring to Fig. 4, the applicant is as can be known by observing pressure-plotting, and when helical teeth labyrinth flow-path 6 import step pressure were 10m, pressure reduced gradually along the orientation of helical teeth labyrinth flow-path, to outlet pressure, is kept to-1.5 * 10
3Pa, be similar to atmospheric pressure.
Referring to Fig. 5 a and Fig. 5 b, the size by flow velocity in helical teeth labyrinth flow-path 6 can be divided into main flow area and eddy flow district significantly, and in main flow area, flow velocity is higher, reach 2.15～3.04m/s, eddy flow district flow velocity is lower, is probably 0.64～0.15m/s, is the zone that the most easily results in blockage.But because width of flow path is larger, main flow area is broader, makes current that larger sediment carrying capacity be arranged, and can relatively reduce the probability of happening that stops up.
Claims (8)
1. a backwash-type fountain root-irrigation irrigator, is characterized in that, by lid (1) and douche core (2), by screw thread, combined, and on the outer wall of douche core (2), also is enclosed with the plastic peel that a layer thickness is 2mm; Described lid (1) top center has water inlet (3), lid (1) is distributed with ventilation water-guiding hole (4) on every side, described douche core (2) is the pipe of a hollow belt dividing plate (5), on circular tube external wall, be distributed with helical teeth labyrinth flow-path (6), filter screen (7) and delivery port (8) are arranged on helical teeth labyrinth flow-path (6), described dividing plate (5) is arranged between filter screen (7) and delivery port (8), and there is the external screw thread (9) that matches with lid (1) at two ends, pipe up and down;
Described oblique tooth-shaped labyrinth flow-path (6), total length are 306mm, and beam overall is 3.5mm, tooth depth 1mm, and space width 3.8mm, dark 2mm, when pressure was 10m, the flow of delivery port (8) was 7L/h;
Under normal circumstances, the threaded closure of the upper end of lid (1) and douche core (2), current enter the inside of douche core (2) from water inlet (3), existence due to water-stop sheet (5), current enter helical teeth labyrinth flow-path (6) energy dissipating after filter screen (7) filters, by delivery port (8), in douche core (2), flowed out; When backwash-type fountain root-irrigation irrigator occurs to stop up, douche core (2) is inverted, and lid (1) is tightened with the screw thread of douche core (2) lower end, and current flow into and wash away helical teeth labyrinth flow-path (6) from delivery port (8), from filter screen (7), flow out, play backwashing function.
2. backwash-type fountain root-irrigation irrigator as claimed in claim 1, is characterized in that, the length of described douche core (2) is 78mm, external diameter 32.5mm, wall thickness 3.2mm.
3. backwash-type fountain root-irrigation irrigator as claimed in claim 1, is characterized in that, the rectangle that is shaped as 9 1.5 * 2mm of described filter screen (7).
4. backwash-type fountain root-irrigation irrigator as claimed in claim 1, is characterized in that, described delivery port (8) is shaped as the rectangle of 1.8 * 2mm.
5. backwash-type fountain root-irrigation irrigator as claimed in claim 1, is characterized in that, the external screw thread (9) at described douche core (2) two ends is identical, and pitch is 2.6mm, and the pitch cross section is square.
6. backwash-type fountain root-irrigation irrigator as claimed in claim 1, is characterized in that, described dividing plate (5) thickness is 3mm.
7. backwash-type fountain root-irrigation irrigator as claimed in claim 1, is characterized in that, described ventilation water-guiding hole (4) is 2, for connection diameter, is the microtubule of 4mm.
8. backwash-type fountain root-irrigation irrigator as claimed in claim 1, is characterized in that, also comprises a matching used sleeve, and described sleeve two ends are penetrating, and sleeve diameter equals the external diameter of lid (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102045588A CN102389866B (en) | 2011-07-21 | 2011-07-21 | Backwash-type fountain root-irrigation irrigator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102045588A CN102389866B (en) | 2011-07-21 | 2011-07-21 | Backwash-type fountain root-irrigation irrigator |
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| Publication Number | Publication Date |
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| CN102389866A CN102389866A (en) | 2012-03-28 |
| CN102389866B true CN102389866B (en) | 2013-11-20 |
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| CN2011102045588A Expired - Fee Related CN102389866B (en) | 2011-07-21 | 2011-07-21 | Backwash-type fountain root-irrigation irrigator |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111383B (en) * | 2012-10-05 | 2015-09-09 | 西北农林科技大学 | A kind of buried intermittent water application formula fountain root irrigation machine |
| CN107318593B (en) * | 2017-08-22 | 2019-11-29 | 中国农业大学 | Combined press force compensating douche between a kind of washable pipe |
| CN109691380A (en) * | 2017-10-22 | 2019-04-30 | 新疆天业节水灌溉股份有限公司 | A kind of flow adjustable pressure compensation type emitter |
| CN109692762B (en) * | 2019-01-25 | 2024-02-27 | 九牧厨卫股份有限公司 | Spraying core and particle spraying water device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2423035Y (en) * | 2000-02-29 | 2001-03-14 | 马荣立 | Water dropper core for drip irrigation pipe |
| CN201385000Y (en) * | 2009-04-03 | 2010-01-20 | 傅海涛 | Demountable dripper and drip irrigation pipe with same |
| CN201552078U (en) * | 2009-11-30 | 2010-08-18 | 杜道兵 | Combined drop irrigation pipeline |
| CN101850309A (en) * | 2010-06-25 | 2010-10-06 | 西北农林科技大学 | Helical labyrinth wide-passage type water filler for filling water into fountain from bottom |
| CN201720143U (en) * | 2010-06-24 | 2011-01-26 | 杭州奥特普灌溉设备有限公司 | Dual-flow cylindrical dripper of drip irrigation pipe |
-
2011
- 2011-07-21 CN CN2011102045588A patent/CN102389866B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2423035Y (en) * | 2000-02-29 | 2001-03-14 | 马荣立 | Water dropper core for drip irrigation pipe |
| CN201385000Y (en) * | 2009-04-03 | 2010-01-20 | 傅海涛 | Demountable dripper and drip irrigation pipe with same |
| CN201552078U (en) * | 2009-11-30 | 2010-08-18 | 杜道兵 | Combined drop irrigation pipeline |
| CN201720143U (en) * | 2010-06-24 | 2011-01-26 | 杭州奥特普灌溉设备有限公司 | Dual-flow cylindrical dripper of drip irrigation pipe |
| CN101850309A (en) * | 2010-06-25 | 2010-10-06 | 西北农林科技大学 | Helical labyrinth wide-passage type water filler for filling water into fountain from bottom |
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| CN102389866A (en) | 2012-03-28 |
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