WO1990007267A1 - A system for drip irrigation and a drip nozzle - Google Patents
A system for drip irrigation and a drip nozzle Download PDFInfo
- Publication number
- WO1990007267A1 WO1990007267A1 PCT/DK1989/000307 DK8900307W WO9007267A1 WO 1990007267 A1 WO1990007267 A1 WO 1990007267A1 DK 8900307 W DK8900307 W DK 8900307W WO 9007267 A1 WO9007267 A1 WO 9007267A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outlet
- nozzle
- drip
- length
- inlet
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
- A01G25/023—Dispensing fittings for drip irrigation, e.g. drippers
-
- 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
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
Definitions
- the present invention relates to a system for drip irriga ⁇ tion of the type stated in the preamble of claim 1 and a drip nozzle of the type stated in the preamble of claim 2.
- Various drip tubes and nozzles are used in irrigation systems, where the water is supplied to for instance plants through feeding pipes and thin water pipes.
- Such systems are characterised by the irrigation water being slowly, such as drippingly, supplied to the nursery bed in such a manner that the water is oxidized and a slow seepage down to the roots of the plants is taking place.
- Most systems for drip irrigation are based on low pressure, such as for instance a column of water of 1 to 1.8 m, in order to achieve the aforesaid effect.
- a simultaneous irrigation of large areas by way of the above low pressure necessi ⁇ tates rather large supply pipes and tubes.
- said tubes are of a diameter of about 1 to 2 mm, in which calcareous deposits set in from the open end with the result that said end must be cut-off in order to re-open the outlet or with the result that the drip tube is generally replaced by a new tube being placed on the supply tube.
- the known drip nozzles are provided wi-th a complicated channel system reducing the water pressure in order to adjust the flow of water to the desired low speed.
- the water is sucked especially from the top drip nozzles into the supply tube with the result that a water membrane remains , said water membrane being oxidized by the entrance of atmospheric air while forming hard deposits of calcium and ferric oxide.
- the drip nozzles may furthermore be choked due to crystallization with the result that the nozzles are quickly blocked up and cannot be used.
- the object of the present invention is to provide a system for drip irrigation and an inexpensive drip nozzle to be used in said system, which ensures a uniform and reliable irrigation of large cultivated areas both in greenhouses, plantations, nurseries and market gardens etc., where the drip nozzle must be able to operate with a high pressure inside the supply tube, and which in ordinary operation prevents atmospheric air from entering the channels of said drip nozzle, and which is not liable to get blocked up, and finally which is easy to clean out.
- the above object is provided by the system and the drip nozzle mentioned in the introduction to this specification, said system and said drip nozzle being characterised by the subject matter of the characterising clause of claim 1 and 2, respectively.
- the resilient closing means ensures an automatic closing by closing for the water, i.e. in case of a low water pressure, and by closing the outlet and the inlet, whereby a back flow is prevented and a small column of water remains in the outlet channel.
- calcium and ferric oxide are subs antially com ⁇ pletely prevented from depositing inside the feeding and outlet channels as well as in the supply tubes.
- each drip nozzle When the water supply is opened, each drip nozzle is immediately pressurized with the result that the membrane is pressed away from the outlet of the feeding pipe and the water is pressed while subjected to a high drop in pressure below the membrane towards the inlet of the outlet pipe so as thereby to flow through and drip from the outlet pipe at an adjusted speed.
- the membrane closes both the outlet and the inlet, and a column of water remains in the outlet with a drop of water hanging at the bottom because the membrane closes the inlet of the outlet pipe.
- the column of water and the drop evaporate slowly in response to the moisture of the air and the surrounding heat, but simultaneously said column of water and said drop prevent, usually until the next irrigation period, air from entering the outlet pipe.
- the characterising clause of claim 3 deals with a parti ⁇ cular embodiment which is easy to manufacture.
- the charac ⁇ terising clauses of claims 3 to 7 deal with practical embodiments which are simple and inexpensive to manufacture by way of mass production.
- the embodiment dealt with in the characterising clause of claims 6 and 7 ensures a retaining of a large column of water and drop in such a manner that the evaporation and consequently the entrance of air into the outlet pipe is maximally. delayed so as to prevent "calcification”.
- the embodiment dealt with in the characterising clause of claim 8 ensures that the passage opening between the axial and radial lengths of pipe is of a complete dimension.
- the membrane dealt with in the characterising clause of claim 9 is an inexpensive membrane, which is easy to replace with respect to maintenance at the same time as the column of water is extended so as to delay additionally the evaporation and the resulting depositing of calcium and ferric oxide.
- the blocking bead described in the characterising clause of claim 11 ensures that the water does not seep in an uncontrolled manner downwards along the outer surface of the nozzle member, whereas the slot stated in the charac ⁇ terising clause of claim 12 ensures a limited irrigation of each plant in case the outlet channel gets blocked up by dirt.
- Fig. 1 is an enlarged view of a first embodiment of the drip nozzle according to the invention, a sectional view of a valve tubing appearing as well,
- Fig. 2 is an enlarged view of a second embodiment of the drip nozzle according to the invention with a supply tube inserted and wherein the right half appears in section,
- Fig. 3 is a diagrammatic view of a system for drip irriga ⁇ tion
- Fig. 4 illustrates an alternative embodiment of the drip nozzle corresponding to the nozzle of Fig. 1, but where said alternative embodiment has been supplemented with a circumferential recess in the surface of the nozzle oppo ⁇ site the inlet of the outlet channel thereof, and
- Fig. 5 is a sectional view of the drip nozzle of Fig. 4 taken along the line V-V.
- a drip nozzle 1, la. for irrigation of plants and according to the invention comprises a nozzle member 2, 2a. preferably made of hard plastics, and a resilient pressure means, i.e. a membrane/valve tubing 3 in the illustrated embodi- ments, said resilient pressure means closing tightly about the major portion of the circumference of the nozzle member.
- a nozzle member is connected to a supply tube 4.
- At the bottom at least one circumferential blocking bead 10 of a circular cross section to prevent seeping of water along the outer surface at the bottom.
- the inlet channel of the nozzle comprises the outer end of the supply tube 4 inserted and clamped and retained by way of friction in a recess 11, said recess being conically and downwardly tapered with respect to varying diameters of the tubes and an easy introduction of the above end.
- the retaining can be further ensured by means of for instance glue or ruggings or clamping means , such as spring rings or screws (not shown) .
- the recess is terminated by a rest 19 for the supply tube,
- the outlet channel of the nozzle comprises
- valve tubing 3 fits tightly to the outlet and the inlet 14 and 16, respectively, so as to close said outlet and inlet.
- Dimensional examples of the drip nozzle shown in the drawing are: Internal diameter of the lengths 12-17 of pipes about 0.5 to 3.0 mm, especially 1.5 mm; the length 18, 18a. of pipe and the extension 26 about 3.5 to 7 mm, especially 4.5 mm and 5 mm, respectively.
- the drip nozzle is of a length of about 25 to 50 mm, especially 30 to 40 mm, and especially 33 mm. Other dimensions, both larger and smaller, can be used.
- a shoulder 21 can be shaped in a particular, water-column- carrying manner at the transition between the second and the third length 17 and 18 of pipe, such as either by
- a water-binding coating optionally also applied onto the inner surfaces of the second and the third length 17 and 18 of pipe and the extension 26 and/or the inner surfaces of the lengths 17 and 18 of pipe can be provided with a rugging or a corrugation.
- the axial lengths 12 and 17 of pipe have been extended in axial direction by a recess 23 and 24, respectively, past the radial lengths 13 and 15, respectively, of pipe in order to ensure a complete passage.
- the outer surface of the nozzle member may be provided with a circumferential recess 30, cf. Figs. 3 and 4, opposite and in flow connection with the outlet channel 15. In this manner it is ensured that the water leaving the outlet 14 is always directed to the length 15 of outlet pipe in such a manner that water can only seep over the rear end of the nozzle member when the outlet channel 15 , 16, 17, 18, 26, 30 has been blocked up.
- a narrow slot 25, cf. Fig. 2 may be cut in the blocking bead so as to provide for seepage of water in case the outlet channel is blocked up by for instance sand or clay.
- the flow resistance inside the slot 25 must, however, be substantially stronger than the one inside the outlet channel in order to prevent water from seeping out this way in an uncontrolled manner.
- the drip nozzle according to the invention operates in the following manner:
- a plurality of drip nozzles are connected through indivi ⁇ dual supply tubes 4 to a common pressure pipe 27, cf. Fig. 3, with a water pressure of for instance 30 m water column.
- a water pressure of for instance 30 m water column.
- the bendings and small diameter, such as 1 to 2.5 mm, of the inlet channel cause the water to flow therethrough under a decreasing pressure to the outlet 14, cf. Fig. 2.
- the water presses the closing means or the membrane 3 away from the surface of the nozzle member 2 and fills a space 29, cf. Fig. 2, with water.
- the con ⁇ tinuously decreasing drop in pressure presses the water to the inlet 16 and further through the outlet channel while forming a column of water inside the channel sections 30, 15, 17, 18, 18a, 24 and 26.
- the blocking bead 10 ensures during the usual running of the system that the flow of water is not pressed in an uncontrolled manner downwards between the surface of the nozzle member 2 and the valve tubing 3 to the periphery of the outlet opening 20. Instead the water is forced into the inlet 16. During the latter flow, the pressure of the water has been de ⁇ creased sufficiently for said water dripping onto the ground at the plant 28 in question, cf. Fig. 3, at a controlled rate.
- Each system of drip irrigation allows an adjustment of the rate and the amount of water to various strains of plants by using drip nozzles having different intervals and different flow directions between the outlet 14 and the inlet 16, cf. Figs. 1 and 2, and/or by choosing drip nozzles where the inlet and outlet channels are of suitable diameters, cf. above.
- the greater resilience of the valve tubing compared to that of ordinary drip tubes implies that the extension 26 thereof functions as an additional safety valve which yields to an increased water pressure and ensures a seepage of water along the surface of the nozzle member past the blocking of the outlet channel. Accordingly, the plant in question is secured against a drying out. Such a seepage occurs, however, in a more uncontrolled manner and may optionally imply that the site in ' question is watered too much.
- the known drip nozzles operate at a relatively low pressure, such as 1.8 m to 3 m of water column, in such a manner that plants growing far from 'the supply source, especially in an undulating ground, are watered less or even not at all compared to plants growing close to the supply source.
- the drip nozzle 1 according to the invention is particular- ly used for irrigation of individual plants 28 growing in greenhouses, market gardens, nursery beds, plantations and corresponding growing sites, such as in fields growing particular crops .
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental Sciences (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK7223/88 | 1988-12-23 | ||
DK722388A DK722388A (en) | 1988-12-23 | 1988-12-23 | Drip irrigation system and drip nozzle |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990007267A1 true WO1990007267A1 (en) | 1990-07-12 |
Family
ID=8149245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1989/000307 WO1990007267A1 (en) | 1988-12-23 | 1989-12-21 | A system for drip irrigation and a drip nozzle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0451204A1 (en) |
AU (1) | AU4833690A (en) |
DK (1) | DK722388A (en) |
WO (1) | WO1990007267A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006119501A1 (en) * | 2005-05-04 | 2006-11-09 | Rodney Ruskin | Anti-syphon emitter |
KR101884904B1 (en) * | 2017-05-30 | 2018-09-11 | 금오공과대학교 산학협력단 | nozzle for drip coffee |
CN114467702A (en) * | 2022-03-04 | 2022-05-13 | 江苏华源节水股份有限公司 | Drip irrigation device suitable for seasonal weather |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3282513A (en) * | 1965-01-07 | 1966-11-01 | Donald W Barlow | Self-cleaning injection nozzle |
GB2024659A (en) * | 1978-05-09 | 1980-01-16 | Armstrong T | Spray nozzle |
EP0070036A2 (en) * | 1981-07-15 | 1983-01-19 | Naan Irrigation Systems | Drip irrigation apparatus |
EP0084938A2 (en) * | 1982-01-14 | 1983-08-03 | Hozelock-ASL Limited | Fluid supply system, a connector, a valve, an atomizer and a method of supplying water |
DE3608621A1 (en) * | 1986-03-14 | 1987-09-17 | Siemens Ag | VALVE, ESPECIALLY IN DOSING CARTRIDGES FOR LIQUID SPRAYERS |
FR2614557A2 (en) * | 1983-08-11 | 1988-11-04 | Kulker Sa | Device for drip irrigation |
-
1988
- 1988-12-23 DK DK722388A patent/DK722388A/en not_active Application Discontinuation
-
1989
- 1989-12-21 AU AU48336/90A patent/AU4833690A/en not_active Abandoned
- 1989-12-21 EP EP90901760A patent/EP0451204A1/en not_active Ceased
- 1989-12-21 WO PCT/DK1989/000307 patent/WO1990007267A1/en not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3282513A (en) * | 1965-01-07 | 1966-11-01 | Donald W Barlow | Self-cleaning injection nozzle |
GB2024659A (en) * | 1978-05-09 | 1980-01-16 | Armstrong T | Spray nozzle |
EP0070036A2 (en) * | 1981-07-15 | 1983-01-19 | Naan Irrigation Systems | Drip irrigation apparatus |
EP0084938A2 (en) * | 1982-01-14 | 1983-08-03 | Hozelock-ASL Limited | Fluid supply system, a connector, a valve, an atomizer and a method of supplying water |
FR2614557A2 (en) * | 1983-08-11 | 1988-11-04 | Kulker Sa | Device for drip irrigation |
DE3608621A1 (en) * | 1986-03-14 | 1987-09-17 | Siemens Ag | VALVE, ESPECIALLY IN DOSING CARTRIDGES FOR LIQUID SPRAYERS |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006119501A1 (en) * | 2005-05-04 | 2006-11-09 | Rodney Ruskin | Anti-syphon emitter |
US7445168B2 (en) | 2005-05-04 | 2008-11-04 | A.I. Innovations, N.V. | Anti-syphon emitter |
KR101884904B1 (en) * | 2017-05-30 | 2018-09-11 | 금오공과대학교 산학협력단 | nozzle for drip coffee |
CN114467702A (en) * | 2022-03-04 | 2022-05-13 | 江苏华源节水股份有限公司 | Drip irrigation device suitable for seasonal weather |
CN114467702B (en) * | 2022-03-04 | 2022-10-28 | 江苏华源节水股份有限公司 | Drip irrigation device suitable for seasonal weather |
Also Published As
Publication number | Publication date |
---|---|
EP0451204A1 (en) | 1991-10-16 |
AU4833690A (en) | 1990-08-01 |
DK722388A (en) | 1990-06-24 |
DK722388D0 (en) | 1988-12-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6996932B2 (en) | Unitized mat to facilitate growing plants | |
US4904112A (en) | Underground irrigation system | |
US4534515A (en) | Drip irrigation system employing adjacently arranged flow-restricting passages | |
US6997402B2 (en) | Unitized mat to facilitate growing woody plants | |
US9228670B2 (en) | Soil moisture responsive irrigation flow control valve | |
US4626130A (en) | Drip irrigation system | |
US4036435A (en) | Drip irrigation emitter | |
US4572756A (en) | Drip irrigation system employing adjacently arranged flow-restricting passages | |
US4017958A (en) | Irrigation apparatus | |
US3302323A (en) | Plant treatment system | |
CA1095275A (en) | Irrigation hose | |
CN216451905U (en) | Water spring irrigation and drip irrigation common irrigation system for intercropping fruit trees in arid region | |
CN216146855U (en) | Constant temperature big-arch shelter with automatic irrigation | |
WO1990007267A1 (en) | A system for drip irrigation and a drip nozzle | |
US4928427A (en) | Irrigation system | |
US4660775A (en) | Means for seeding through a center pivot irrigation system | |
US20040089748A1 (en) | Sprinkling system | |
AU606214B2 (en) | A water spray fitting | |
US10406538B2 (en) | Micro stream emitter for use in irrigation systems | |
CA2237925A1 (en) | Tree irrigation system (tis) with a controller of negative pressure | |
US4359297A (en) | Dike irrigation | |
US4780023A (en) | Watering hose | |
US5279460A (en) | Pressure-compensated self-flushing dripper and mini spray | |
Davis et al. | Subsurface irrigation easily automated | |
RU2222938C1 (en) | Drop irrigation injector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AT AU BB BG BR CH DE DK ES FI GB HU JP KP KR LK LU MC MG MW NL NO RO SD SE SU US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE BF BJ CF CG CH CM DE ES FR GA GB IT LU ML MR NL SE SN TD TG |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1990901760 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWP | Wipo information: published in national office |
Ref document number: 1990901760 Country of ref document: EP |
|
WWR | Wipo information: refused in national office |
Ref document number: 1990901760 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1990901760 Country of ref document: EP |