WO2008132749A1 - Système perfectionné d'irrigation souterraine - Google Patents

Système perfectionné d'irrigation souterraine Download PDF

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Publication number
WO2008132749A1
WO2008132749A1 PCT/IL2008/000592 IL2008000592W WO2008132749A1 WO 2008132749 A1 WO2008132749 A1 WO 2008132749A1 IL 2008000592 W IL2008000592 W IL 2008000592W WO 2008132749 A1 WO2008132749 A1 WO 2008132749A1
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WO
WIPO (PCT)
Prior art keywords
conduit
liquid
pipe
sleeve
base
Prior art date
Application number
PCT/IL2008/000592
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English (en)
Other versions
WO2008132749A4 (fr
Inventor
Shahar Harari
Avihai Simner
Original Assignee
Shahar Harari
Avihai Simner
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 Shahar Harari, Avihai Simner filed Critical Shahar Harari
Publication of WO2008132749A1 publication Critical patent/WO2008132749A1/fr
Publication of WO2008132749A4 publication Critical patent/WO2008132749A4/fr

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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
    • A01G25/06—Watering arrangements making use of perforated pipe-lines located in the soil

Definitions

  • the present invention relates to underground irrigation systems.
  • the invention relates to underground irrigation systems with high uniformity of watering and / or aeration.
  • Sub surface irrigation systems are known. Sub surface irrigation has several advantages compared to watering from above. These include reduced water loss through evaporation, relative immunity to tampering, reduced weed germination, amenability to use of 'gray' water for irrigation, and avoidance of wetting of the culm (ground plant matter), which minimizes mildew and the like.
  • Underground irrigation systems are usually based on periodically spaced drippers and thus tend to provide non-uniform irrigation, as the ground adjacent to the drippers tends to be over-watered, whereas the ground between the drippers tends to be under-watered.
  • more irrigation water is applied so that the ground between the drippers becomes sufficiently irrigated, leading to over watering closer to the drippers.
  • a significant proportion of the water is wastefully distributed to below the root zone.
  • Irrigation tube describes an irrigation system which has an inner tube and an outer tube, both of which have periodic apertures therealong, with the openings in the outer tube being larger than those of the inner tube.
  • the outer tube and inner tube thereof are sealed together. This results in non-uniform irrigation. Furthermore, it is difficult to perform maintenance on the system in case of puncture or blockage. The system is also very sensitive to elevation differences which result in the flow in lower portions along the tube being greater than in the higher portions.
  • US 4,904,112 to McDonald titled "Underground irrigation system” describes an inner pipe having a plurality of apertures on a top surface thereof, connected to a pressurized water source.
  • the inner pipe is located within a slightly larger outer pipe and rests on a bottom inner surface of the outer pipe.
  • the outer pipe is designed to be buried just below the plant root line.
  • a series of longitudinal slots on a bottom portion of the outer pipe permits water flowing from the inner pipe to the outer pipe to trickle unimpeded into the surrounding soil. Since the water tends to percolate under gravity to below the outer pipe, the resulting irrigation is wasteful.
  • British patent GB2006591 to JUFORS BO titled “Irrigation Systems” presents a system for the irrigation of plants, the system having a spaced plurality of tubular clay pipes buried underground and communicating at the respective upstream ends thereof with a conduit for water supply.
  • the tubular pipes have sufficiently porous side walls so that capillary forces in the ambient soil draw water from the tubular pipes through the walls to replace water taken up by plants growing in the soil.
  • US 5,839,659 to Grain Security Foundation Ltd. entitled "Capillary root zone irrigation system” depicts a system that uses one or more conduits having spaced apart perforations therealong, with the conduits being held in pockets.
  • the pockets are formed by an upper layer of capillary cloth and a lower layer of capillary cloth and/or a water impermeable material.
  • the upper layer of capillary cloth is moistened by the flow out of the perforations and in turn distributes water to the root area of plants.
  • the structure of the system makes it impossible to replace the inner tube in case of puncture or blocking without digging in the ground and exposing the pipe.
  • the system is not suitable for even distribution of fluids along the system, since the irrigation pipe is tightly sandwiched between two layers of cloth, and the fluid goes directly from drippers along the pipe to the cloth.
  • the system does not compensate for non uniform flow of air and/or gas from the drippers due to pressure difference along the pipe; the pressure tending to drop with distance from the fluid source, blocked drippers etc.
  • US 5,816,742 describes integral hollow conduits to disburse fluids along their length.
  • the conduit has longitudinal openings that vary in width along its length and are fabricated out of two materials: a profile of thermoplastic material with a lengthwise slit wall and a layer of fabric imbedded and sandwiched on its sides in the thermoplastic walls, lengthwise along both sides of the slit.
  • the fabric is purported to control emission of fluid.
  • Underground irrigation systems are often susceptible to rodent damage. There is a need for underground irrigation systems that are easily serviceable, that provides uniform irrigation and/or aeration, that are less susceptible to damage by rodents, and that are robust to blockages. Embodiments of the present invention address this need.
  • One aspect of the invention is directed to providing a conduit for dispersion of a fluid underground, the conduit comprising a sleeve; the sleeve comprising a base structure and an upper structure thereover and coupled thereto, thereby defining a chamber between said base structure and said upper structure; the base structure comprising an impermeable material and having a cross-section with a substantial flat or raised center on its upper surface to encourage liquid thereon to flow towards outer edges thereof, and the upper structure comprising a permeable material to allow fluid flow therethrough.
  • the upper structure comprises walls and a roof.
  • the upper structure is arched.
  • the permeable layer is permeable to liquid and to gas and is selected from the group comprising woven fabrics, non- woven fabrics, sponges and geo-textiles.
  • the permeable layer is a non-woven fabric devoid of biodegradable fibers.
  • the upper structure further comprises a support framework for supporting the permeable layer.
  • the framework is rodent proof.
  • the framework may comprise a material selected from the group of plastics, metals and alloys.
  • the conduit has a coupling of the upper structure to the base structure comprising at least one of the group comprising stitches, mechanical coupling, plastic welding and adhesives.
  • the permeable layer is impregnated with at least one active ingredient selected from the group comprising rodent repellent, root growth inhibitors and fertilizers.
  • the conduit further comprises at least one intermittently perforated pipe therealong for leaking a fluid into the chamber for subsequent dispersion of the fluid through the permeable layer.
  • the conduit further comprises an intermittently perforated liquid pipe running freely through the chamber for leakingly piping a liquid along the sleeve such that the intermittently perforated pipe leakingly dispenses said liquid onto the base structure and the liquid wicks through the permeable layer.
  • the conduit further comprises a liquid pipe running through the base for piping liquid along the base of the sleeve, the liquid pipe having perforations on an upper surface thereof for leaking liquid onto the base.
  • the liquid comprises water and dissolved fertilizer.
  • the conduit further comprises an intermittently perforated gas pipe running through the chamber for leakingly piping a gas along the sleeve.
  • the conduit further comprises a gas pipe running through the base for piping gas along the base of the sleeve, the gas pipe having perforations on an upper surface thereof for leaking gas into the chamber.
  • the base has intermittent ridges thereacross to impede flow of liquid therealong.
  • the conduit further comprises an access box at an end thereof, the access box comprising: (i) a removable cover above said end and (ii) a cavity therearound.
  • conduit further comprises metallic indicators for allowing locating of positions of underground components with a metal detector.
  • Another aspect of the invention is directed to providing a method of subsoil irrigation comprising:
  • conduit containing an intermittently perforated pipe therealong;
  • the conduit comprising a sleeve fabricated from a base structure comprising an impermeable material and an upper structure thereover coupled to the base structure and comprising a permeable layer, the sleeve defining a chamber between said base and said upper structure, the perforated pipe running along the conduit;
  • the dispersing step includes diffusing the liquid through the permeable layer into the soil therearound.
  • the method further comprises piping gases through the sleeve and diffusing the gases through the liquid and the permeable fabric.
  • gases gaseous species or mixtures thereof, especially air, oxygen, nitrogen, fertilizers in the gaseous phase, water vapor and the like.
  • Liquid and variations thereof, refer to any liquid, but particularly to water and aqueous solutions. “running freely through” means to being freely removable from and insertable into.
  • “permeable is a property of a material such as a fabric or spongy textile, that allow liquids and gases to pass therethrough, but holds back solid particles over a minimum size.
  • “dripper pipe”, “dripper conduit” etc. refers to intermittently perforated liquid pipes, characterized by having perforations or holes therealong through which a pressured liquid flowing through the pipe will be ejected, using as drips, dribbles or occsionally spurts or spray, depending on pressure, surface tension and the like.
  • Fig. Ia is a schematic illustration of the liquid distribution within ground material obtained with a typical prior art underground dripper pipe;
  • Fig. Ib is a schematic illustration of the more uniform liquid distribution within the ground material obtained with embodiments of the invention.
  • Fig. 2 is a vertical cross section through an underground irrigation conduit with an intermittently perforated pipe for supplying liquid inside a sleeve having an essentially flat base of an impermeable material and a chamber, in accordance with a first embodiment of the invention
  • Fig. 3 is a section through a dripper pipe and a gas pipe inside a sleeve, in accordance with a second embodiment of the invention
  • Fig. 4a is a section through a liquid pipe and a sleeve wherein the base of the sleeve comprises a hollow perforated conduit serving as an airpipe, in accordance with a third embodiment of the invention
  • Fig. 4b is a section through a gas pipe and a sleeve wherein the base of the sleeve comprises a liquid pipe with intermittent perforations along an upper surface thereof, in accordance with a fourth embodiment of the invention
  • Fig. 4c is a section through a sleeve wherein the base of the sleeve comprises both a liquid pipe and a hollow conduit serving as an airpipe, with intermittent perforations along the upper surfaces thereof, in accordance with a fifth embodiment of the invention
  • Fig. 5 is an isometric view of a section of an underground irrigation conduit including a dripper pipe and a sleeve consisting of a flat base and a wall of fluid-permeable, ground material-impermeable fabric over a support structure, the wall being in contact with the flat base of a water-impermeable material, and the base having raised edges therealong, in accordance with a sixth embodiment of the invention;
  • Figs. 6a to 6c are side views through of underground irrigation conduits having ridged bases according to a seventh embodiment of the invention, and Figs. 6d and 6e are top views of ridged bases in accordance with an eighth embodiment of the invention;
  • Fig. 7a-d are isometric views of underground irrigation conduits consisting of a dripper pipe within a sleeve, the conduits including access boxes at ends of the pipe, according to a ninth embodiment of the invention;
  • Fig. 8 is an isometric view of a section of an underground irrigation conduit with multiple dripper pipes connected to a common water source, according to a tenth embodiment of the invention.
  • Fig. 9 is an isometric view of a section of an underground irrigation conduit with a metal strip/wire placed along the sleeve, according to an eleventh embodiment of the invention.
  • Fig. 10 is a flowchart illustrating a method of irrigation in accordance with the invention.
  • Embodiments of the present invention relates to easily maintained underground irrigation systems with intermittently perforated liquid pipes and the like, included in or inserted into chambers within sleeves, for even distribution of liquid, and sometimes gases and dissolved fertilizers into ground material.
  • liquid from the perforated inner conduits is provided at a suitable pressure such that the liquid is released thereout as drips rather than as a spray.
  • Fig. Ia shows a profile of liquid distribution within ground material 6 obtained using typical prior art underground dripper pipes 8. The liquid forms damp patches 4a, 4b, 4c around drippers 5a, 5b and 5c.
  • FIG. Ib shows a vertical cross section through part of a conduit 100 for underground dispersion of a fluid in accordance with one embodiment of the present invention.
  • the conduit 100 includes a sleeve 120, the sleeve having: (i) an arched upper structure 122 including a layer fabricated from a fluid-permeable, ground material-impermeable material, and (ii) base 123 being essentially flat across its width and being made from a water impermeable material.
  • a chamber 124 is defined by the base 123 and the upper structure 122.
  • the conduit 100 further includes a dripper pipe 8 with drippers 5a, 5b therealong running through chamber 124.
  • a liquid 4 typically water, perhaps with dissolved fertilizer, piped through the dripper pipe 8 at pressure, drips 7 from the drippers 5 out of dripper pipe 8 into the chamber 124, and accumulates on the base 123 of the sleeve 120 as puddles 121.
  • the upper structure 122 of the sleeve 120 When laid underground, the upper structure 122 of the sleeve 120 is in direct contact with the ground material 6 thereabout, and allows liquid 4 supplied by the dripper pipe 8 to pass from the upper structure 122 to the ground material 6 by capillary action, while preventing the ground material 6 from pervading the sleeve 120 and blocking the drippers 5 of the dripper pipe 8, as often happens in sub-surface irrigation dripper pipes (Fig. Ia) of the prior art. Drippers 5 are not in direct contact with the upper structure 122, as direct contact has been found to lead to the liquid passing through the permeable layer and into ground material 6 without dispersing along the conduit, thus providing irregular irrigation.
  • the permeable layer may be made of material such as a woven fabric, non- woven fabric, spongy textile or geo-textile, for example. Fabrication from a non- woven fabric natural fibers, is preferable, since natural fibers are susceptible to rot.
  • the upper structure 122 may be arched as shown, or may consist of separately identifiable walls and roof.
  • the upper structure 122 together with the base 123 defines a chamber 124.
  • the upper structure 122 may be coupled to the base 123 by stitches, mechanical coupling, plastic welding and/or adhesives.
  • proper soil aeration is essential for good plant growth. It therefore may be advantageous to supply, in addition to liquid, air or oxygen via the conduit, to supplement air diffusing into the soil from the atmosphere.
  • Fig. 3 shows one such conduit 200 in accordance with a second embodiment of the present invention, in which in addition to the dripper pipe 8 there is also a gas pipe 214 running through the sleeve 220.
  • a gas typically air, piped through the gas pipe 214 at pressure, flows out of perforations 215 along the gas pipe 214 into the chamber 224 defined by the space between the base 223 and the sleeve's upper structure 222 , and thus gas and/or aerated water diffuse through the fluid- permeable arcuate structure 222 into the ground material 6 thereabout.
  • the sleeve 220 itself may be connectable to a compressor or fan (not shown), to force air therethrough.
  • Fig. 4a shows conduit 300a according to a third embodiment of the invention, in which the base 323a of the sleeve 320a is itself hollow and perforated on upper surface with perforations 336, and serves as an air supply pipe.
  • the perforations 336 are preferably only along the upper surface of the base 323a.
  • the base 323b may comprise a water pipe with intermittent perforations along an upper surface 321 thereof, serving as a source of liquid 4 that wells out and accumulates onto the base 323b.
  • a perforated gas pipe 314 runs through the sleeve 320b, aerating the liquid 4 within the sleeve 320b, thereby supplying air 32 to the ground material.
  • the water pipe 324b irrigates the ground material around the sleeve 320b by diffusing through the permeable layer in the upper structure 322.
  • conduit 300c in conduit 300c the base 323c includes both a water pipe and a hollow airpipe, both with intermittent perforations along upper surfaces thereof, serving as sources of liquid 4 and air 32 for supplying to the ground material 6 thereout.
  • Figure 5 shows a section of a conduit 400, in accordance with a fourth embodiment of the present invention.
  • the conduit 400 includes a dripper pipe 8, a sleeve 420 consisting of an upper structure 422 including fluid-permeable ground- material-impermeable layer 425 and a support structure 426; the upper structure is coupled to a flat base 423, and the base 423 has raised edges 427a-b therealong. The edges 427a-b facilitate the spreading of puddles of liquid along the base 423.
  • the support framework 426 may be made of plastic, metal or alloy, and may be rigid or semi-rigid, with a curved profile as shown, or another shape. It may be meshed as shown, or perforated or with cutouts, for example. Preferably, it has an open structure to allow essentially unimpeded passage and large flux of fluids through the upper structure 422, for irrigation, aeration and/or soil drainage, yet providing a strong and flexible framework for supporting the weight of ground material there above.
  • the support structure is rodent proof and prevents rodents from damaging the inner irrigation and air pipes.
  • the upper structure 422 may be self supporting without the support framework 426.
  • the support framework 426 may be placed outside the permeable layer 425, thus providing protection to both the dripper pipe 8 and to the permeable layer 425, or may be placed under the permeable layer 425 as a preferred embodiment, as in Fig. 5, which may provide less protection for the permeable layer 425 from, for example rodents gnawing the sleeve 420, but facilitates the placement of the sleeve 420 underground and/or the construction of the sleeve 420 since the upper structure 422 does not have to be affixed to the support 426.
  • the support 426 is affixed to the permeable layer 425 and to the base 423, perhaps by gluing, by ultrasonic welding, or by sewing, or other method that preferably does not appreciably interfere with the wicking of liquid through the permeable layer 425.
  • the permeable layer 425 may be pretreated with root control materials, or such root-control materials may be added to the irrigation water, for example, as is customary in drip-line irrigation systems. Indeed, additionally or alternatively, it may be impregnated with other chemical species, such as selected weed killers, rodent poison, fertilizers, and pesticides, for example.
  • Blockages of some of the drippers in the dripper pipe in irrigation systems tend to cause uneven irrigation.
  • the drippers are isolated from the ground and roots and separated therefrom by a permeable material and by a chamber. This feature reduces the occurrence of blockages and provides improved distribution of the fluids and compensatory irrigation and/or aeration by drippers adjacent to a blocked dripper.
  • the base 423 is typically flat, thus facilitating the even spreading of the liquid along the conduit and subsequent even distribution of the liquid into the ground material surrounding the conduit 400, even when the surface above the conduit 400 is uneven, or some drippers 5 are blocked.
  • the conduit has further features for further improving the uniformity of irrigation to uneven terrain.
  • the base 523a of the conduit sleeve 420 may be corrugated, preferably across the base 523a, as shown, thus advantageously hindering or preventing liquid from flowing freely down slopes.
  • the base 523a is made of a flexible impermeable material such as polyethylene, for example.
  • the conduits 500b-500d may have raised barriers 540b- d spaced along the base 523b, the barriers 540b-d being oriented toward the interior of the sleeve 520.
  • the liquid 4 is retained by such raised barriers 540b and forms puddles along the length of the sleeve 520.
  • the barriers 540b may be made from the same material as the floor material such as polyethylene (PE), for example, by pinching the base material upwards or, a second material may be attached to the base material.
  • PE polyethylene
  • the barriers 540c may be fabricated from a porous material which may be a woven fabric, a non-woven fabric or felt, a sponge etc. which absorbs some of the liquid 4 by capillary action, the absorbed liquid 4 subsequently passing into the permeable layer, the remaining liquid flowing along the base 523c and being absorbed by an adjacent barrier 540c.
  • Each barrier 540c may absorb liquid from several drippers 5' -5'".
  • raised protrusions 54Od on the base 523d may guide the liquid 4 toward walls 522 such as when the conduit 50Od is placed at an angle.
  • the structures of the conduits 100-500 shown in Figs. 2 to 6 allow the liquid from the pipes to be transferred along the sleeve, and also enable free movement of gas along the interior of the sleeve and its uniform distribution therewithin. Such gas may pass through the liquid, and diffuse with it through the permeable layer to arerate the ground material, diffuse directly into the soil through the upper structure, and/or be forced into the soil due to pressure differences.
  • the uniform irrigation and aeration provided by embodiments of the invention have a major impact on the economy of irrigation, water conservation, friendliness to the environment and, potentially, crops yield.
  • the present invention provides plants along the conduits with more uniform irrigation, aeration and, when used, fertilization, at a slow rate suitable for gradual uptake, and with minimum waste of the fluids. When using fertilizers, the minimum waste of water leads to minimal usage of fertilizers.
  • the sleeve is buried at a depth appropriate to the roots of the crop thereabove. For example, for some lawn grasses, 6" may be an appropriate depth.
  • An intermittently perforated pipe may be inserted into and threaded through the sleeve before or after the sleeve is laid underground.
  • Perforated pipes may freely run through conduits 10-500 and thus may be easily extracted out of and inserted into the sleeves, as there is no inherent need for them to be fixed to any other part of the conduit.
  • Some embodiments of the invention afford easy extraction of the underground perforated pipes for maintenance of the conduit, and their subsequent repositioning after the maintenance is completed, or their replacement, as required.
  • Such maintenance may include inspection of drippers, removing blockages, pipe replacement etc. It is noted, that usefully, such maintenance procedures may be carried out without undesirably upsetting the ground material above the conduit, the surface above the conduit and crops, and without need for cessation or interruption of activities performed on the surface.
  • such underground irrigation conduits may include a dripper pipe 8 within a sleeve 720; the conduits further may include an access box 750a at the upstream end 716a of the dripper pipe 8, the access box 750a may include a removable cover 752 above the end 716a of a dripper pipe 8 and a cavity 754 therearound.
  • the pipe 8 may be connected to a liquid or gas supply line 756a.
  • the pipe 8 may be connected at both sides 716a, 716b to supply lines 756a, 756b thereby providing uniform pressure therealong.
  • an end cap 758 may be placed on the downstream end 716b of the pipe 8.
  • the end-cap 758 may have a conical shape or other geometry to ease the manual or mechanical insertion into and extraction of the pipe 8 from the sleeve 720.
  • the end cap 758 may be fixed to pipe end 716b or it may be detachable therefrom. It may also serve to seal the downstream end 716b, in order to prevent free escape of liquid and/or gas from the downstream end 716b and to allow pressure to build up inside the pipe 8.
  • the dripper pipe 8 may be inserted into an underground sleeve 720 by: (i) providing access boxes 750a-b at both ends 728a, 728b of the sleeve 720; (ii) extending a string 760 throughout the sleeve 720, such that the string ends be accessible via the access boxes 750a,b; (iii) mounting an endcap 758 onto end 716b of the dripper pipe 8, the endcap 758 being connectable to the end 761b of the string 760; (iv) raising the covers 751a,b of the access boxes 750a,b; (v) connecting the end 761b of the string 760 to the endcap 758 as shown; and (vi) pulling the the string 760 in force and direction suitable for drawing the dripper pipe 8 inside and through the sleeve 720.
  • a reel 762 may be used for pulling the string 760.
  • the upstream end 716a of the pipe 8 may then be connected to a source of pressurized fluid 756a.
  • the endcap 758 may be removed and the downstream end 716b of the pipe 8 may also be connected to a source of pressurized fluid (not shown), thereby providing uniform pressure along the the pipe 8.
  • the supply of pressurized fluid to the pipe 8 is halted, the endcap 758 may be reconnected to the pipe 8 if not already connected, the string 760 may be reconnected to the endcap 758 and the pipe 8 pulled out of the sleeve 720 in the direction that reextends the string 760 throughout the sleeve 720 for later easy reinstallation of the pipe 8 or another pipe into the sleeve 720.
  • several dripper pipes 8 may be connected to the same source of pressurized fluid 856.
  • Dripper pipes 8, 8', 8" are typically spaced apart at a distance of between 0.3 cm and a meter; however, the total length of each pipe 8 may be up to hundreds of meters.
  • an irrigation problem it may be detected by deterioration in the condition of the irrigated plants, such as yellow patches of turf, or by water logging of parts of the surface.
  • large conduits 800 or if the terrain is not flat there might be a problem to detect which access box 850 is connected to the problem pipe 8, or where to dig in order to expose the pipe 8.
  • This problem may be solved by using a sensor (not shown) that detects the conduit 800 or sections of the conduit 800 by measuring, for example, the capacitive or magnetic change between sections of the conduit 800 such as the sleeves 820 or the dripper pipes 8 or the access boxes 850 or by measuring a radar echo from an section of the conduit 800 produced by a RF transmitter or the like.
  • the sensor may be used by approaching in a direction that increases the signal until reaching the detectable section of the conduit 800.
  • a strip/wire 970 may be placed in the conduit 900, for example along and above the sleeve 920.
  • the strip/wire 970 may be from a metallic material detectable by a metal detector.
  • it may be useful to differentiate between various sub-surface irrigation parts, by using strip/wires 970 that provide different responses to each part, for example, by putting different amounts or kinds of metal in different subsurface conduit parts.
  • a method of irrigation consists of burying a conduit containing an intermittently perforated pipe therealong in accordance with one of the embodiments hereinabove; (b) piping an aqueous liquid along the intermittently perforated pipe; (c) exuding the aqueous liquid from the pipe via perforations therealong into the chamber; (d) puddling the aqueous liquid onto the base; (e) wicking the puddled liquid into the upper structure of the sleeve, and (f) dispersing the aqueous liquid through the upper structure into soil therearound.

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Fertilizing (AREA)
  • Catching Or Destruction (AREA)

Abstract

L'invention concerne une conduite pour une distribution d'un fluide sous terre, la conduite comprenant un manchon; le manchon comprenant une structure de base et une structure supérieure sur celle-ci et couplée à celle-ci, définissant ainsi une chambre entre ladite structure de base et ladite structure supérieure; la structure de base comprenant un matériau imperméable et ayant une section transversale ayant un centre sensiblement plat ou surélevé sur sa surface supérieure pour favoriser un écoulement du liquide sur celui-ci en direction des bordures externes de celui-ci, et la structure supérieure comprenant un matériau perméable pour permettre au fluide de s'écouler à travers celle-ci. La conduite peut en outre comprendre un ou plusieurs tuyaux de fluide perforés de façon intermittente pour égoutter du liquide ou aérer la conduite et de cette façon irriguer et/ou aérer le sol autour de celle-ci.
PCT/IL2008/000592 2007-05-01 2008-05-01 Système perfectionné d'irrigation souterraine WO2008132749A1 (fr)

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US92688907P 2007-05-01 2007-05-01
US60/926,889 2007-05-01
US96158607P 2007-07-24 2007-07-24
US60/961,586 2007-07-24

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WO2010078579A1 (fr) * 2009-01-05 2010-07-08 Developmental Technologies, Llc Système de canalisations d'adduction à pression uniforme pour élévations variables et procédés associés
CN103008129A (zh) * 2013-01-11 2013-04-03 中国农业大学 一种包膜式滴灌管/带及生产方法
CN108934978A (zh) * 2018-09-29 2018-12-07 北京普泉科技有限公司 一种灌溉水管及其制作方法
ES2784951A1 (es) * 2019-03-28 2020-10-02 Ibilbide Services S L Dispositivo de riego localizado
USD1011151S1 (en) 2014-10-30 2024-01-16 Curt Hummel Plant stake apparatus

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CN103028502B (zh) * 2013-01-11 2015-05-20 中国农业大学 一种包膜式滴灌管/带生产方法及设备

Citations (4)

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Publication number Priority date Publication date Assignee Title
FR2686771A1 (fr) * 1992-02-04 1993-08-06 Antunes Antoine Installation d'irrigation souterraine.
WO1994026094A1 (fr) * 1993-05-18 1994-11-24 Byles Joe D Procede et appareil d'irrigation souterraine
WO2002082888A1 (fr) * 2001-04-14 2002-10-24 Sächsisches Textilforschungsinstitut e.V. Natte d'irrigation textile
EP1695615A1 (fr) * 2005-02-23 2006-08-30 Universite Laval Tapis d'irrigation et méthode d'utilisation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686771A1 (fr) * 1992-02-04 1993-08-06 Antunes Antoine Installation d'irrigation souterraine.
WO1994026094A1 (fr) * 1993-05-18 1994-11-24 Byles Joe D Procede et appareil d'irrigation souterraine
WO2002082888A1 (fr) * 2001-04-14 2002-10-24 Sächsisches Textilforschungsinstitut e.V. Natte d'irrigation textile
EP1695615A1 (fr) * 2005-02-23 2006-08-30 Universite Laval Tapis d'irrigation et méthode d'utilisation

Cited By (6)

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CN103008129A (zh) * 2013-01-11 2013-04-03 中国农业大学 一种包膜式滴灌管/带及生产方法
CN103008129B (zh) * 2013-01-11 2015-08-19 中国农业大学 一种包膜式滴灌管/带及生产方法
USD1011151S1 (en) 2014-10-30 2024-01-16 Curt Hummel Plant stake apparatus
CN108934978A (zh) * 2018-09-29 2018-12-07 北京普泉科技有限公司 一种灌溉水管及其制作方法
ES2784951A1 (es) * 2019-03-28 2020-10-02 Ibilbide Services S L Dispositivo de riego localizado

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