EP1819215A1 - Systeme de tuyaux servant a fournir un fluide, de preference a des fins d'irrigation souterraine - Google Patents

Systeme de tuyaux servant a fournir un fluide, de preference a des fins d'irrigation souterraine

Info

Publication number
EP1819215A1
EP1819215A1 EP05848994A EP05848994A EP1819215A1 EP 1819215 A1 EP1819215 A1 EP 1819215A1 EP 05848994 A EP05848994 A EP 05848994A EP 05848994 A EP05848994 A EP 05848994A EP 1819215 A1 EP1819215 A1 EP 1819215A1
Authority
EP
European Patent Office
Prior art keywords
inner tube
hose
tube
fluid
pressure
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Withdrawn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
EP05848994A
Other languages
German (de)
English (en)
Inventor
Gisbert Staupendahl
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.)
Walter Herbert
Original Assignee
Walter Herbert
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 Walter Herbert filed Critical Walter Herbert
Publication of EP1819215A1 publication Critical patent/EP1819215A1/fr
Withdrawn legal-status Critical Current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
    • A01G25/06—Watering arrangements making use of perforated pipe-lines located in the soil

Definitions

  • Hose system for dispensing a fluid, preferably for underwater irrigation
  • the invention relates to a hose system for dispensing a fluid, that is to say for dispensing liquids or gases, in particular water, preferably for underbody irrigation of the type mentioned in the preamble to claim 1.
  • Preferred areas of application are underwater irrigation of larger vegetation areas, the ventilation of sewers or contaminated waters and the regeneration of contaminated soils, the tube systems can be used above the soil surface.
  • a major disadvantage of most previously known hose systems is that they do not ensure a uniform application of the fluid over long distances and / or in hilly terrain without quite complex controls.
  • the maximum length of a hose system with only a single injection point for the fluid is limited even when using high-performance pumping technique using most conventional types of hoses by the pressure dependence of the discharged fluid amount, as the over large hose lengths adjusting pressure drop automatically to a reduction of this amount and thus leading to uneven fluid application, so especially irrigation.
  • hoses used in agriculture and horticulture with very small individual holes for direct transition of the fluid into the adjacent soil, to realize the application of small amounts of fluid over long lengths.
  • These types of hoses are, however, in the long run because of the clogging of the holes by impurities, especially during prolonged interruption of irrigation, z. B. outside the growing season, or the ingrowth of the finest hair roots extremely vulnerable.
  • a certain remedy here is the pressure-independent hose system known from EP 0 824 306 B1, in which an elastic inner hose with outlet openings, which is accommodated within an outer hose serving as a protective jacket and having a slot-shaped opening extending along a surface line.
  • a pressure-independent release of the fluid is to be achieved by the pressure-dependent deformation of the inner tube cross-section.
  • this system has the disadvantage that during prolonged unpressurized periods, ie z. B. at times for maintenance or irrigation times outside the growing seasons, an irreversible deformation of the hose cross-section, z. B. by the ground pressure, so that the commissioning of the properties of the hose are adversely affected.
  • FR 2 713 044 A1 describes a system consisting of inner and outer hose in which the outer hose consists of porous material.
  • the dimensioning of the hoses should be such that in order to achieve a uniform water outlet, the pressure is reduced in two stages, including the pores of the outer tube compared with the Portionierlöchern the inner tube must have a relatively large cross-section.
  • This hose system has the significant disadvantage that the amount of water leakage depends greatly on differences in altitude of the terrain to be irrigated.
  • the present invention is based on the object, starting from the tube system according to FR 2 713 044 Al with the features mentioned in the preamble of claim 1 of this system so that the above-described disadvantages are avoided, which also in the inventive system an outer stable protective sheath should be provided, in which a fluid supply serving flexible inner tube is arranged.
  • the buffer space between the outer and inner tubes is subdivided into individual provision chambers, into each of which a portioning hole of the inner tube opens, wherein, however, the cross section of the openings of the outer tube is substantially smaller than the cross section of the outer tube Openings of the inner tube.
  • This segmentation together with the dimensioning of the openings, ensures that, in the case of a hose system not laid horizontally, the hose environment in higher and lower areas is supplied uniformly with sufficient pressure and with sufficient fluid quantity.
  • the dimensioning of the pores and Portionierlöcher which preferably corresponds to the proposal according to claim 14, has the consequence that the supplied via the inner tube into the space between the inner and outer tube fluid only at a certain pressure through the smaller cross-sectional openings of the outer tube in the Hose environment exits.
  • the outer tube also ensures resistance to environmental influences.
  • Such hoses are resistant to ground pressure, contamination or ingrowth of the finest roots, which in particular on the large number of small fluid outlet openings, so pores z. B., is due.
  • a buffer volume is built up in the intermediate region between inner and outer tube, which serves as a fluid reservoir and ensures that the higher pressure, z. B. of several bar, via the inner tube brought up fluid passes through the Portionierlöcher in the intermediate region between the inner and outer tube and from this through the fine openings of the outer tube, z. B. a porous tissue is discharged into the tube environment.
  • the Portionierlöcher the inner tube here can also have complex functions and properties, eg. B. pressure compensating or self-cleaning.
  • the segmentation proposed by the invention can be achieved according to claim 2 in a simple manner in that the outer tube is provided with constrictions, which preferably equidistantly abut the outside of the inner tube.
  • the inner tube to form the preparation chambers preferably equidistant annular bulges, which bear against the inner surface of the outer tube.
  • the inner tube and the buffer space can each be connected via controllable valves to a separate fluid source, preferably to a water connection and / or a compressed air source.
  • a fluid preferably water for the purpose of rapid irrigation fed.
  • the hose system has a water outflow rate that corresponds to the simple membrane hose.
  • the inner tube may consist of such elastic material, that it rests on increasing the fluid pressure over its entire'Lucke to the inner wall of the outer tube, whereby at times the entire buffer space is released, so the fluid exits the inner tube directly through the porous outer tube in the vicinity of the Portionierlöcher the inner tube.
  • the constrictions of the outer tube or the bulges of the inner tube can be connected to the inner tube in a fluid-tight manner, preferably welded, according to claim 12.
  • the material of the outer tube has a lower melting point than the material of the inner tube.
  • materials for outer and inner tube are in principle polymeric materials, which should have a higher elasticity than the outer tube according to claim 14 in the sense of the task division of the inner tube.
  • the Portionierlöcher may be funnel-shaped. According to claim 20, the wall of the inner tube in the region of the Portionierlöcher is dented approximately circular and has a reduced wall thickness in this area.
  • the fluid outlet quantity is determined by the elastic properties of the hose system. It is not influenced by the modulus of elasticity of the materials used and there is no dependence on the operating temperature of the hose system.
  • the chemical composition of the outer tube can be chosen so that sufficient protection against destruction of the tube by environmental factors, eg. B. also by rodents.
  • porous material outer tube according to claim 15, for. B. be formed as a bead, sponge or membrane tube.
  • the effect sought by the invention is substantially favored by the fact that according to the proposal of the invention, the material of the outer tube is chosen and its openings are dimensioned so that they open only when a predetermined pressure threshold, preferably at 0.3 bar.
  • a predetermined pressure threshold preferably at 0.3 bar.
  • the liquid passes evenly over the entire hose length from, wherein the constant equilibrium value is reached when the Z.
  • Flow through the Portionierlöcher the inner tube corresponds to the exiting from the outer tube amount. If the latter becomes too large due to the relatively high permeability of the porous outer tube, the pressure in the buffer volume drops below the threshold value and the water outlet is automatically stopped until a sufficient pressure has built up in the buffer volume again.
  • This effect has the advantage that the system can be designed for exceptionally small discharge quantities by means of the number of portioning holes per unit length already during hose production.
  • Another advantage is that by choosing the pressure in the inner tube for any tube configuration, a large range is available for controlling the amount of leakage of the tube system.
  • the proposed with claim 18 pressure threshold for the outer tube has a particularly advantageous when laying the tube system in hilly terrain.
  • the buffer volume and in particular the buffer volume segmented in the supply chambers will be filled with liquid, so that the liquid over the Length of the hose system, preferably the entire segment area, largely uniformly emerges.
  • the lengths of the preparation chambers are in this case to be dimensioned so that the tube parameters, namely the fluid pressure in the inner tube, the Portionierloch tomesser and the threshold, are optimally matched to each other in terms of a uniform liquid application.
  • the lengths of the preparation chambers are so large and the flow rates through the Portionierlöcher of the inner tube are so small that due to the effect of the gravitational pressure in lower supply chambers in the sum with the building up internal pressure in the buffer volume a much higher discharge amount of Fluid through the outer tube as resulting in the higher preparation chamber.
  • an optimum has to be found in this case, with the possibility of achieving a largely uniform application of the liquid over the hose length by means of relatively short preparation chambers, in which, of course, a required number of portioning holes must open.
  • a fluid preferably water
  • the surface of the outer tube is such that its function is not impaired by long-term effects such as contamination of the fluid outlet openings or ingrowth of roots into these openings.
  • the material can be selected so that the hose system is flexible and stable, so that it can be easily installed with conventional techniques, but on the other hand, functions impairing deformations is protected by ground or vehicle pressure.
  • the system is also suitable for ünterteilbenningung z. B. of lawns in sports stadiums. In this case, only sufficient heating power must be supplied via the fluid. Taking advantage of the self-segmentation, it is possible in this application to realize a high-performance heating in that the heated fluid is introduced into the surrounding soil via the buffer space.
  • FIG. 1 shows a longitudinal section of a per se known hose system
  • FIG. 2 shows a cross-section of the hose system according to FIG. 1 along the line II-II rotated through 180 °
  • FIG. 4 shows a graph illustrating the quantity of fluid V exiting per unit length L of the hose system as a function of the fluid pressure p v in a hose system having a porous hose with a pressure threshold p V s,
  • FIG. 6 shows a longitudinal section of the hose system according to the invention with expanded inner hose
  • FIG. 7 shows a longitudinal section of the hose system similar to FIGS. 3 and 5 in the operating state
  • FIG. 8 shows a longitudinal section of the hose system according to FIG. 7, but at reduced pressure in the inner hose
  • Figure 9 shows a schematic representation of the hose system whose inner hose and buffer space can be connected to fluid sources via controllable valves
  • Figure 10 is a schematic representation similar to the representation of Figure 9 a hose system with compressed air connections,.
  • FIG. 11 Partial supervision of an inner tube with modified portioning hole
  • FIG. 12 shows a longitudinal section of the hose part according to FIG. 11,
  • FIG. 13 is a partial plan view of a hose part with a Portionierloch according to a second embodiment
  • FIG. 14 shows a longitudinal section of the hose part according to FIG. 13,
  • FIG. 15 Partial supervision of a hose part with a portioning hole according to a third exemplary embodiment
  • FIG. 16 shows a longitudinal section of the hose part according to FIG. 15,
  • FIG. 17 is a partial plan view of a hose part with a Portionierloch according to a fourth embodiment
  • Figure 18 partial longitudinal section of a hose system with the inner tube of Figure 17 at reduced internal pressure
  • FIG 19 longitudinal section of Figure 18 at elevated internal pressure.
  • hose system With the figures 1 and 2, the basic structure of the hose system is shown in longitudinal and cross-section, as it is in itself z. B. FR 2 713 044 A is known. This hose system consists of a porous, mechanically and chemically stable material.
  • an inner tube 2 is arranged, whose outer diameter D 1 is smaller than the inner diameter D A of the outer tube 1.
  • D 1 is smaller than the inner diameter D A of the outer tube 1.
  • the preferably made of fluid-tight material inner tube 2 has distributed over the length of openings, hereinafter called Portionierlöcher 4, on.
  • the connected to a fluid source inner tube 2 is of a fluid 3, preferably water, flows through a pressure p F , which is depending on the length of the hose system in the order of 1 to 8 bar.
  • the fluid 3 passes via the Portionierlöcher 4 in the buffer volume 5 forming annular buffer space, which fills with fluid until the ruling in this FIu- iddruck p v is greater than the predetermined by the material of the outer tube 1 pressure threshold p s . After this, the fluid exits into the tube environment 9.
  • the throttling effect of the outer tube 1 is connected to a tube made of porous material, for. B. a Perl, sponge or membrane tube reached.
  • the pressure in the buffer volume p v breaks down after a certain time, so that the outlet of fluid 6 is interrupted until a larger pressure p v has built up again in the buffer volume as the pressure threshold p s .
  • the fluid outlet 6 is automatically regulated by the Portionierlöcher 4 corresponding to the outflow rates of the fluid.
  • the distances of the Portionierlöcher 4 and the pressure p F of the fluid in the inner tube 2 can be matched to one another with a suitable choice of the material of the outer tube 1, that the amount of the exiting fluid 6 is largely constant over long lengths of the tube system.
  • Suitable materials for inner and outer hoses 1 and 2 are polymer materials, wherein the inner tube 2 should consist of a flexible, fluid-tight polymeric material, while the outer tube may consist of a more stable, but also flexible porous polymer material. For these mixtures of rubber and polymers have proven. This selection of materials provides sufficient flexibility with high robustness and resistance to external influences.
  • This design has the effect that, even with an inclined arrangement of the hose system, the chambers 8 are filled with fluid, which exits into the hose environment 9 when the pressure threshold p s is exceeded.
  • the fluid is discharged evenly into the tube environment 9.
  • Portionierlöcher 4 a By suitable adaptation of the length 1 of the provision chamber 8 and the number of opening into the respective chamber 8 Portionierlöcher 4 a largely constant fluid delivery is made possible even at high gradients of the terrain.
  • V / L 0
  • porous outer tubes whose material does not produce a pressure threshold ps.
  • the fluid in the vicinity of the portioning holes of the inner tube passes directly through the wall of the outer tube, so that the fluid does not escape uniformly in the tube environment. But that can be z. B. in a subsoil irrigation accepted, since the soil causes a uniform distribution of the liquid due to diffusion effect.
  • outer hoses without pressure threshold properties can be used if the hose system is segmented, as shown in FIG. 5 and explained with reference to FIG.
  • the preparation chambers 8, into which in each case at least one portioning hole 4 of the inner tube 2 opens, ensure a sufficiently uniform application of the fluid in the tube environment 9.
  • the inner tube 2 over its entire length of highly elastic material, can be achieved by increasing the pressure that it, as shown in Figure 6, the inner wall of the outer tube 1 'applies, the constrictions 7 are pushed back.
  • the above-described segmented buffer space is hereby canceled, so that the fluid passes through the Portionierlöcher 4 directly through the porous outer tube 1 'in the adjacent region of the tube environment 9, as indicated by dashed lines.
  • the material of the outer tube 1 ' has a pressure threshold, adjacent to each Portionierloches 4 forms a small, unillustrated buffer volume, from which the fluid exits to the outside, when its pressure exceeds the pressure threshold.
  • the buffer volume located between the outer tube 1 and the inner tube 2 is subdivided, namely segmented, by bulges 1 ', which are created by the working pressure p F of the fluid 3 in the interior of the inner tube 2 against the inner wall of the outer tube 1.
  • the wall thickness of the inner tube 2 in the region of the bulge 7 ' is reduced with respect to the wall thickness of the adjacent regions of the inner tube 2, so that at normal working pressure p F and suitable elasticity of the inner tube 2 is a bulging, the bulges 1' so under pressure to the Inner wall of the outer tube 1 apply
  • this working pressure p F in the inner tube is reduced to a value which is less than or equal to the internal pressure p v in the buffer space, ie in the preparation chambers 8, the bulges 1 'form, so that, as shown in FIG Segmentation is canceled.
  • the fluid can flow not only in the inner tube 2, but also in the area located between the inner and outer tubes 1 and 2.
  • This design opens up different ways of working.
  • inner tube 2 and outer tube 3 are each provided at input and output with controllable valves 23 and 24 or 25 and 26, as illustrated with FIG. 9.
  • valves 23 and 24 are open, so that fluid can flow under pressure.
  • valves 25 and 26 open to allow an unimpeded flow of the fluid.
  • the cleaning of the buffer space 5 presupposes the cancellation of the segmentation as shown in FIG. If the pores of the outer tube 1 are to be cleaned in a targeted manner, the valve 26 is to be closed, so that the fluid is forced through the pores.
  • a compressed gas preferably air
  • the buffer space 5 which enters the hose environment, ie the soil, through the pores of the outer tube 1.
  • the three-way valve 15 connects the inner tube 2 via lines 20 to a reservoir 21 for a cleaning agent.
  • This cleaning agent is circulated by means of a circulating pump 19 and introduced into the inner tube 2 via a three-way valve connected between the cleaning valve 22 and the inlet of the inner tube 2.
  • the three-way valves 14, 15 and 22 are opened for the passage of compressed air.
  • the compressed air generated by the compressor 18 the still located in the inner tube 2 water is pushed beyond the open valve.
  • the buffer space 5 is connected to the compressor 18. The water in the buffer space is pushed out by means of the compressed air over the opened three-way valve 17.
  • the three-way valves 14 and 15 are switched to the detergent circuit.
  • the pump 19 ensures that the cleaning agent is circulated from the reservoir 21 via the lines 20 and in this case flows through the inner tube 22.
  • the pressure of the detergent p R must be smaller than the pressure p L of the compressed air in the buffer space 5.
  • the cleaning agent can act for a predetermined time.
  • the compressor 18 is connected via the now switched three-way valves 14 and 22 with the inner tube 2, whereby the cleaning agent from the inner tube is pushed back into the reservoir 21.
  • the three-way valves 15 and 22 are switched to water passage, so that the inner tube 2 is rinsed with water.
  • the three-way valve 15 is closed, so that in the manner described above in the inner tube introduced water can emerge after construction of the segmentation on the outer tube 1.
  • this arrangement serves the basic cleaning of the entire hose system, whereby targeted the most sensitive parts of the system, namely the portion holes in the inner tube can be cleaned with little effort and protected against contamination.
  • Such basic cleanings only need to be . . B. irrigation times, to be performed.
  • This milling process in the immediate vicinity of the portioning holes can be achieved by designs of the hole cross section shown in FIGS. 11 to 19.
  • the portioning hole 12 shown in FIGS. 11 and 12 has a funnel-shaped cross section. With sufficient variation of the pressure difference between the inner tube and the buffer space such a deformation of the hole cross-section that occurred inside or in the region of the hole 12 resulting solid crusts flaked or soft clogging z. B. be eliminated by self-growth.
  • FIGS. 14 to 16 Modifications of this funnel-shaped cross section of the hole are illustrated by FIGS. 14 to 16. These symmetrical or asymmetrical tulip shapes 10 and 11 of the Portionierlöcher favor the chipping process during the Walk process. Another variant of the Portionierloches, which favors the self-cleaning by Walken, is illustrated with the figures 17 to 19.
  • a circular disc-shaped indentation 13 is provided in the region of the Portionierloches 4, which is directed at low fluid pressure p F inside the inner slide 2 inward.
  • the wall thickness of the inner tube 2 is reduced in the region of the indentation 13.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention concerne un système de tuyaux servant à fournir un fluide, de préférence à des fins d'irrigation souterraine. Ce système de tuyaux comprend un tuyau interne (2) qui amène le fluide, et qui est disposé dans un tuyau externe (1'), à une distance de celui-ci. Un volume tampon se forme entre le tuyau interne (2) et le tuyau externe (1), ce volume tampon étant divisé en chambres d'approvisionnement par l'intermédiaire de rétrécissements (7) du tuyau externe (1'). Le fluide (3) amené par le tuyau interne (2) entre dans les chambres (8) par l'intermédiaire d'orifices de portionnement (4). Le tuyau externe (1') est de préférence constitué d'un matériau poreux. Pour pouvoir remplir le volume tampon (5) de fluide, la section transversale des ouvertures du tuyau extérieur (1) est sensiblement plus petite que la section transversale des orifices de portionnement (4) du tuyau interne (2). A cet effet, le tuyau interne (2) est constitué d'un matériau imperméable au fluide, tandis que le tuyau externe est constitué d'un matériau poreux ou perforé.
EP05848994A 2004-12-06 2005-12-01 Systeme de tuyaux servant a fournir un fluide, de preference a des fins d'irrigation souterraine Withdrawn EP1819215A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004058858A DE102004058858A1 (de) 2004-12-06 2004-12-06 Schlauchsystem zum Ausbringen eines Fluids, vorzugsweise zur Unterbodenbewässerung
PCT/EP2005/012815 WO2006061132A1 (fr) 2004-12-06 2005-12-01 Systeme de tuyaux servant a fournir un fluide, de preference a des fins d'irrigation souterraine

Publications (1)

Publication Number Publication Date
EP1819215A1 true EP1819215A1 (fr) 2007-08-22

Family

ID=35968352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05848994A Withdrawn EP1819215A1 (fr) 2004-12-06 2005-12-01 Systeme de tuyaux servant a fournir un fluide, de preference a des fins d'irrigation souterraine

Country Status (5)

Country Link
US (1) US20070252023A1 (fr)
EP (1) EP1819215A1 (fr)
DE (1) DE102004058858A1 (fr)
WO (1) WO2006061132A1 (fr)
ZA (1) ZA200705032B (fr)

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CN103190237A (zh) * 2013-04-19 2013-07-10 李晓东 一种地埋式植物浇灌装置
CN103190238A (zh) * 2013-04-19 2013-07-10 李晓东 一种地埋式植物浇灌方法
JP2018508232A (ja) * 2015-02-02 2018-03-29 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニーＥ．Ｉ．Ｄｕ Ｐｏｎｔ Ｄｅ Ｎｅｍｏｕｒｓ Ａｎｄ Ｃｏｍｐａｎｙ 灌漑チューブにおける根の侵入の改善
AU2018364795B2 (en) 2017-11-08 2024-05-30 N-Drip Ltd. Methods and systems for irrigation at stabilized pressure
CN108043615A (zh) * 2017-12-28 2018-05-18 中国电建集团成都勘测设计研究院有限公司 模拟天然降雨的试验装置
US10251336B1 (en) * 2018-07-02 2019-04-09 United Arab Emirates University Drip irrigation system
DE102019000038A1 (de) * 2019-01-02 2020-07-02 Edna Evangelista Marques da Silva Verfahren und Vorrichtungen zur effektiven Unterbodenbewässerung landwirtschaftlicher Nutzflächen
CN112715333B (zh) * 2020-12-25 2022-04-15 河南农业大学 一种节水灌溉装置
CN113785755B (zh) * 2021-10-19 2023-10-27 广州番禺职业技术学院 带旁路灌溉水管
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Also Published As

Publication number Publication date
WO2006061132A1 (fr) 2006-06-15
US20070252023A1 (en) 2007-11-01
DE102004058858A1 (de) 2006-06-08
ZA200705032B (en) 2008-09-25

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