EP0365639A1 - Tuyau d'irrigation par jets d'eau et son procede de fabrication - Google Patents

Tuyau d'irrigation par jets d'eau et son procede de fabrication

Info

Publication number
EP0365639A1
EP0365639A1 EP89904746A EP89904746A EP0365639A1 EP 0365639 A1 EP0365639 A1 EP 0365639A1 EP 89904746 A EP89904746 A EP 89904746A EP 89904746 A EP89904746 A EP 89904746A EP 0365639 A1 EP0365639 A1 EP 0365639A1
Authority
EP
European Patent Office
Prior art keywords
inner part
tube
drip irrigation
irrigation tube
further characterised
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89904746A
Other languages
German (de)
English (en)
Other versions
EP0365639A4 (en
Inventor
Peter John Snelling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0365639A1 publication Critical patent/EP0365639A1/fr
Publication of EP0365639A4 publication Critical patent/EP0365639A4/en
Withdrawn legal-status Critical Current

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
    • A01G25/026—Apparatus or processes for fitting the drippers to the hoses or the pipes
    • 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
    • A01G25/006—Tubular drip irrigation dispensers mounted coaxially within water feeding tubes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/021—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing of profiled articles, e.g. hollow or tubular articles, beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0072—Roughness, e.g. anti-slip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
    • 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

  • This invention relates to drip irrigation tube and to a method of manufacture of such tube.
  • One of the problems to which this invention is directed relates to providing at the cheapest possible cost, a distributed water outlet system in which water delivered into a first principal tube at a delivery pressure is allowed to drip from a number of distributed outlets at significantly reduced pressures.
  • Gilaad U.S.A. Patent No. 3792588
  • a separately manufactured pressure reduction device that is to be connected at spaced apart intervals with hose.
  • spiral path follows a direction so that pressure reduction is achieved substantially by laminar flow losses.
  • the length of a channel between inlet and outlet has to be substantial in practice or the cross sectional area of the channel has to be very small.
  • the channel becomes prone to blockage by particles that can be found or formed from suspended colloidal material in irrigation waters. It is therefore necessary in order to provide adequate pressure reduction without being vulnerable to such blockage, to provide that there are substantial lengths of channel available for control of water from any inlet to an outlet.
  • One of the advantages of the Drossbach principal is that by providing a separately formed outlet tube which is continuous along the length of the inner tube, there is therefore provided a strengthening of the tube along its full length so that the thickness of material necessary for any selected pressure for the inner tube can be appropriately reduced, hence further providing a cost reduction.
  • the problem therefore is to propose an arrangement which can both keep the cost of such materials to a minimum while providing improved pressure reduction capability with an aperture channel which will not be prone to blockage and whereby substantial flexibility in the location of outlets can be achieved.
  • a pathway direction which is tortuous by providing for a plurality of substantial changes of flow direction of substantially 90° or more between an inlet and an outlet which can thereby provide a substantial pressure loss by reason of kinetic energy losses.
  • Each channel shape is provided by at least one long part which has a predominant direction extending substantially parallel to a center axis of the tube.
  • each tortuous channel is formed as at least two long parts each of which has a predominant direction extending substantially parallel to a center axis of the tube and each being located adjacent each other around the outer surface of the inner part.
  • each of the long parts is connected at one end to a channel commonly connecting other of the long parts to either an inlet os an outlet aperture.
  • the inlet would extend from within the tube through the inner part to a first end of one of the passage ways and the outlet would extend from an end of the passage ways through an outer part.
  • an inner part and “an outer part” is intended to embrace two types of constructions, one in which there are two tubes, one around the other, the outer tube tightly fitting but not welded to or substantially integral with the inner tube.
  • the second arrangement is the case where the outer part is either welded or glued or is otherwise affixed to the inner part so that it becomes either difficult or perhaps impossible to distinguish the two parts from an integral article, where however they have been separately formed and indeed could comprise plastics materials which can be differently formulated and indeed can provide differing polymer orientation so that there can indeed be a strengthening effect between the two parts.
  • Such an arrangement can be achieved for instance where a first inner tube is passed through a coextrusion or second die and there is an outer tube extruded directly around the inner tube while both are in a sufficient melt state to cause substantial adhesion or integration.
  • the material must be able to be made in an ongoing in line situation where the material is directly exiting from an extrusion die and is able to be treated in such a way as to have these channels formed therein on this ongoing basis in such a way that the outlet and aperture spacing can be selected from time to time and accordingly varied and furthermore, that the extent of pressure reduction achieved can also be selected relatively readily on an ongoing basis from time to time.
  • the tortuous channel has a predominant direction along which it will direct the water and that there is accordingly located a plurality of such long parts which are located substantially parallel to an axis of the tube into which the shape is impressed and which are located adjacent each other around the circumference of the outer surface of the inner part.
  • main channel parts By arranging the main channel parts in this way, these can be interconnected both at one end or another or even at intermediate parts between their ends so that by having a changeable die part which can either impress a bridging channel between the main channels or not will effectively change the pressure reduction length.
  • a method of manufacture of a drip irrigation tube which comprises the steps of extruding as an inner part a first tube, impressing into an outer surface of such inner part at spaced apart locations along the said first tube a plurality of channel shapes providing for a tortuous pathway, and then closing over the said inner part including such channel shapes with an outer part so that the outer part entirely surrounds and is of the same length as the said inner part and is such as to form thereby pressure reduction conduits providing a tortuous pathway for liquid between for each pressure reduction conduit an inlet from within the tube to each respective pressure reduction conduit and an outlet between each respective pressure reduction conduit and an outer side of the said outer part.
  • co-extruded tubes can be caused to meld together to form an integral tube or it can be assumed that the two tubes to not meld together the one draws tightly around the other so as to at least provide for a sealing engagement over the formed channels.
  • Such an inner reaction pressure can be achieved in various ways, but in one preferred arrangement is provided by an internal mandrel which in preference can be caused to travel with the tube while the impression is being caused.
  • One of the further difficulties relates to effecting an impression in such a way that a large number of these can be achieved around the outer perimeter of the inner tube.
  • the dies provide not only a shaping by impression pressure but that there is also provided for suction to suck parts of the plastic into the less full parts of the die shape.
  • Such features assist in providing for best angular confirmation of the tortuous channel shape.
  • Fig. 1 is a perspective view of a part of the drip irrigation tube made according to the embodiment with however an outer part being partly cut away showing the impressed shape within the outer surface of the inner part
  • Fig. 2 shows the tortuous path pressure reduction shape showing a first long part showing a principal direction channel path and then a second long part showing a return channel path in an opposite direction in each case parallel however to a center axis axis of the tube
  • Fig. 3 is the same view as in Fig. 2 except that it shows an inlet part for an aperture through the inner part of the tube
  • Fig. 4 is the same view as in Figs. 2 and 3 except it shows a last channel connecting through to an encircling outlet channel
  • Fig. 5 is an enlarged perspective view of the tube as in each of the preceding drawings with partly cut away portions of the part at the left hand end of Fig. 3,
  • Fig. 6 is a cross sectional view through the tube showing the circumferential distribution of the channels as shown in Figs. 2, 3, and 4,
  • Fig. 7 is a lateral cross section of the tube as shown in Figs. 1 , 5 and 6,
  • Fig. 8 is a schematic view in side elevation of a machine assembly effecting manufacture of a tube according to this embodiment
  • Fig. 9 is an end view of the impressing dies with externally controlling pistons
  • Fig. 10 is a side view of the impressing dies as in Fig. 9,
  • Fig. 11 is a cross section enlargement of the impressing dies as shown in the centre of Fig. 9 showing in particular the interlocking relationship of the respective dies,
  • Fig. 12 is a schematic side elevation in cross section of that part of the manufacturing device with a flying central mandrel
  • Fig. 13 is the cross section A-A as shown in Fig. 12,
  • Fig. 14 is the cross section B-B as shown in Fig. 12,
  • Fig. 15 is the cross sectional view C-C as shown in Fig. 12 and
  • Fig. 16 is the cross sectional view D-D as shown in Fig. 15.
  • Fig. 9,10 and 11 there are a plurality of channel forming segment die mount blocks 1 which are controlled in position by segment insert/retract pneumatic cylinders 2
  • a mandrel 10 which is located by being secured to a stem 11 extending from an extrusion die provides support for a tapered sleeve 12.
  • the tapered sleeve 12 is arranged so that with the clamping pressure exerted by pattern forming segments 8, this will cause the mandrel 10 to be moved in the direction of the channel forming die segments 8 to travel until released and there will be caused then a reaction from segment retaining springs 13 and there is provided a return pressure by reason of hydraulic piston and cylinder 14.
  • the pipe being impressed is shown at 25.
  • the interacting relationship of the impression forming dies specifically the pattern forming die segments 8 and the pattern forming die segment mount blocks 1 have a relationship so that when an impression action is anticipated, the segment insert, retract pneumatic cylinders 2 are synchronized so that in the first instance 8b, 8d and 8f are pushed into an impressing position and thereafter 8a, 8c and 8e follow.
  • the tube arrangement at 15 includes an outer part and an inner part which in this instance are shown as being essentially integral in that by being co-extruded they are melded so as to be indistinguishable apart from microscopic examination which would show that the polymers of the outer part are crossing in direction as compared to those of the inner part.
  • the tube is manufactured from an appropriate plastic such as polythene and there is impressed into the outer surface of the inner part of the tube 15 a plurality of pressure reduction conduits 17 which are connected from an inlet 16 to an outlet 27.
  • Each of these conduits 17 are formed by having the channel shape as shown impressed into the outer surface of the inner part and being formed into a plurality of long parts each of which have a predominant direction extending longitudinally with the central axial direction of the tube 15.
  • each of long parts of the channel shapes 17 a general direction which is parallel to this axis and each of these are adjacent one and the other so that there can be readily formed between them either bridging channels shown typically at 24
  • FIG. 2, 3 and 4 in which at the end of the last of the long parts there is shown an interconnecting passage 20 to a common circumferential passage 21 which in turn is connected to outlet circumferential passageway 23.
  • the passageways have a large number of very abrupt changes in direction whereby water expected to pass therethrough will be caused to turn in most cases through approximately 90 degrees change in direction.
  • This concept is not of itself new but is known in the art to provide pressure reduction substantially kinetic energy losses rather than friction losses in water .
  • the apparatus for manufacture of the tube is shown in schematic layout in Fig. 8 and provides in the first instance an extruder for the first inner part of the tube shown at 30 which then leads through an assembly of 31 which includes the channel forming die segment mount blocks 1 located on a flying support assembly, the two positions being shown in the drawing, one of which is in dotted outline at the end of the pressure cycle.
  • the co-extruder extruding the outer part of the tube 39 is shown at 32 and this is then passed through a cooling chamber 33, a haul off device 34, an outlet aperture cutter 35 and a wind-off spool 36.
  • the assembly at 31 includes a large rotating cam wheel 37 having constant back pressure from a piston 38.
  • the cam wheel 37 is profiled such that the forward velocity resulting from its action is constant therefore ensuring that the forming head assembly 31 will match the speed of the extruding inner port 38 of the tube 39.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Soil Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention se rapporte à un tuyau d'irrigation par jets d'eau en plastique et à son procédé de fabrication. Le tuyau (15) est formé à partir d'une partie intérieure extrudée (25), dans la surface extérieure de laquelle est imprimée une série de longs canaux tortueux (17), lesquels s'étendent dans une direction généralement longitudinale par rapport au tuyau (15). Une partie extérieure (26) est ensuite extrudée sur la partie intérieure (25) sur une longueur égale, les deux parties formant ainsi un tuyau d'irrigation par jets d'eau essentiellement d'un seul tenant (15). Les canaux tortueux (17) sont disposés de façon à produire une réduction de pression notable entre une entrée (16) et une sortie (27). Les canaux tortueux (17) sont imprimés dans la surface extérieure de la partie intérieure (25) au moyen d'un certain nombre de segments de matrices disposés radialement autour de la partie intérieure (25), un mandrin interne assurant un support et une force de réaction pour les segments de matrices pendant l'opération d'impression.
EP19890904746 1988-04-12 1989-04-12 Drip irrigation tube and method of manufacturing same Withdrawn EP0365639A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU7700/88 1988-04-12
AUPI770088 1988-04-12

Publications (2)

Publication Number Publication Date
EP0365639A1 true EP0365639A1 (fr) 1990-05-02
EP0365639A4 EP0365639A4 (en) 1990-09-26

Family

ID=3773017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890904746 Withdrawn EP0365639A4 (en) 1988-04-12 1989-04-12 Drip irrigation tube and method of manufacturing same

Country Status (2)

Country Link
EP (1) EP0365639A4 (fr)
WO (1) WO1989009539A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009061A1 (de) * 1990-03-21 1991-09-26 Drossbach Gmbh & Co Kg Verfahren und einrichtung zur kontinuierlichen herstellung eines bewaesserungsschlauches
ES2103790T3 (es) * 1990-12-20 1997-10-01 Kritis Plastika Metodo de produccion de una tuberia de riego por goteo y una tuberia de riego por goteo.
GR1001357B (el) * 1990-12-20 1993-10-29 Plastika Kritis A V E E Τροποποιήσεις σωλήνα στάγδην άρδευσης με ενσωματωμένο συνεχή αγωγό μείωσης πίεσης.
US6817548B2 (en) * 2001-09-05 2004-11-16 R.M. Wade & Co. Fluid distribution emitter and system
IL151446A0 (en) * 2002-08-22 2003-04-10 Netafim A C S Ltd Integral dripping emitter
ITMI20041915A1 (it) * 2004-10-08 2005-01-08 Agriplast Srl Tubo di irrigazione a goccia con emettitori interni ed emettitori per lo stesso
BRPI0621883A2 (pt) 2006-07-19 2012-10-16 Netafim Ltd canal em labirinto para reduzir pressão e/ou vazão de um lìquido que escoa no canal
DE102011057089A1 (de) * 2011-12-28 2013-07-04 Parssa Razavi Tropfenbewässerungsrohr
CN111565560B (zh) * 2017-11-08 2023-06-02 恩足立普有限公司 在稳定压力下的灌溉方法及系统
CN111527856B (zh) * 2020-05-28 2021-06-25 安徽省益丰生态农业科技有限公司 用于水肥一体化的滴灌装置
CN115581189B (zh) * 2022-03-04 2024-05-24 江苏华源节水股份有限公司 一种适用于季节性天气的滴灌装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES402875A1 (es) * 1971-05-23 1975-05-16 Standards Inst Israel Perfeccionamientos en los sistemas de irrigacion.
AU484446B2 (en) * 1974-11-20 1976-05-20 Sahagun-Barragan Jaime Dripping irrigation tubing
US4022384A (en) * 1975-12-08 1977-05-10 Hancor, Inc. Irrigation tubing
MX143576A (es) * 1977-04-11 1981-06-03 Jaime Sahagun Barragan Mejoras en sistema integral de riego por goteo
AU511876B2 (en) * 1977-04-12 1980-09-11 Drossbach, Hubert Maximilian Irrigation pipe
CH655636B (fr) * 1982-05-14 1986-05-15
AU579113B2 (en) * 1983-09-20 1988-11-17 Townsend Controls Pty. Ltd. Irrigation hose
AU4317885A (en) * 1984-06-04 1985-12-12 Snelling, P.J. Drip irrigation method and arrangement

Also Published As

Publication number Publication date
EP0365639A4 (en) 1990-09-26
WO1989009539A1 (fr) 1989-10-19

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