EP1181417B1 - Materiau utilisable dans un systeme de transfert de fluide - Google Patents

Materiau utilisable dans un systeme de transfert de fluide Download PDF

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Publication number
EP1181417B1
EP1181417B1 EP00935309A EP00935309A EP1181417B1 EP 1181417 B1 EP1181417 B1 EP 1181417B1 EP 00935309 A EP00935309 A EP 00935309A EP 00935309 A EP00935309 A EP 00935309A EP 1181417 B1 EP1181417 B1 EP 1181417B1
Authority
EP
European Patent Office
Prior art keywords
fluid transfer
transfer material
fluid
pipe
thermoset
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.)
Expired - Lifetime
Application number
EP00935309A
Other languages
German (de)
English (en)
Other versions
EP1181417A1 (fr
Inventor
John Alexander Gaskarth
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.)
Econoplas Ltd
Original Assignee
Econoplas Ltd
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Filing date
Publication date
Priority claimed from GBGB9912652.6A external-priority patent/GB9912652D0/en
Application filed by Econoplas Ltd filed Critical Econoplas Ltd
Publication of EP1181417A1 publication Critical patent/EP1181417A1/fr
Application granted granted Critical
Publication of EP1181417B1 publication Critical patent/EP1181417B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B11/00—Drainage of soil, e.g. for agricultural purposes

Definitions

  • the present invention relates to a material for use in a system for transferring fluid, and to a fluid transfer system incorporating such a material.
  • the invention relates particularly, but noc exclusively, to a material for use in a drainage and/or irrigation system. From DE-A-42 17 739 a drainage mat of recycled plastic material is known. US-A-4 439 475 discloses a map mat or carpet of washable type comprising a rubber or plastic back to drain of liquid.
  • underground drainage/irrigation systems are known in which an underground pipe having slits, respectively carries water away from/to an area of ground to be drained or irrigated.
  • Such systems suffer from the drawback that mud and silt can enter into the pipe and cause blockages, or the slits in the pipe can become blocked by debris.
  • a further problem associated with pipe systems is that as the diameter of a pipe is increased, the quantity of material required to construct a pipe of sufficient strength to protect against compression dramatically increases. This in turn significantly increases the cost of the pipe.
  • All such pipes can also succumb to compression forces from the surface, such as experienced from increasing heavy farm machinery, and are prone to collapse. This problem is accentuated around areas of most frequent use, such as gateways.
  • Preferred embodiments of the present invention seek to overcome the above disadvantages of the prior art.
  • a fluid transfer material for use in a system for transferring fluid, the material comprising:
  • thermoplastic material melded with or bonded to at least one fibrous material and/or at least one thermoset material, this provides the advantage of providing a fluid transfer material through which fluid can pass, but which prevents passage of larger particles such as stones or gravel, which could otherwise cause blockages in pipes.
  • the fluid transfer material can be constructed with a relatively rigid open structure, which enables the fluid transfer material to be sufficiently strong and durable while still allowing fluid to pass therethrough.
  • the thermoset material is used to provide rigidity, and resilience to compressive forces.
  • the fibrous material is provided to assist the thermoset material in creating an open structure. In time the fibrous material may decay and further assist in creating an open structure.
  • At least one fibrous material may be included.
  • At least one said thermoset material may be chopped, shredded or fragmented.
  • At least one thermoset material may comprise rubber.
  • At least one said thermoset material may be recycled from motor vehicles.
  • At least one said fibrous material may comprise straw.
  • At least one said fibrous material may comprise wood.
  • At least one said fibrous material may be inorganic.
  • At least one said thermoplastic material may be recycled.
  • thermoset material used may be reclaimed materials from the vehicle dismantling industry or from car tyres which at present are costly to dispose of. Fibrous materials such as straw also present disposal problems, in particular linseed and rape straw which rot much more slowly than other straws.
  • the thermoplastics may also be recycled, and mixed source thermoplastics may be used.
  • the use of mixed source thermoplastics has the further advantage that unlike many conventional thermoplastic recycling techniques, which require a relatively high level of purity of recycled material, almost any thermoplastic can be added to the mixture to facilitate the bonding or melding together of the other materials.
  • At least one said thermoplastic material may be chopped or shredded.
  • the material is moulded.
  • the materials are mixed together, preheated and placed into mould where they are melded together.
  • the materials are heated by hot gas.
  • the material may be formed by an extrusion process at elevated temperature.
  • the material is at least partially surrounded by netting.
  • the necking is in the form of a fine mesh.
  • the advantage is provided that an additional filtering of particulate matter occurs prior to fluid passing into the material. This will therefore reduce the quantity of suspended solids within the effluent discharged from the material, making the effluent more suitable for discharging in watercourses or for providing drinking water for livestock. Furthermore, the netting will reduce the risk of blockage within the material and therefore extend its life.
  • said material further comprises mica or vermiculite.
  • the advantage is provided that the material retains some water within it the structure, longer than when such materials are not present, and is able to give this material up later. This provides the advantage when the material is used for irrigation or as a rooting media for use in hydroponics that water has a longer retention time within the material.
  • a system for transferring fluid comprising:
  • said conduit is a gutter arranged in use below an elongate length of said fluid transfer material.
  • the conduit may be an elongate pipe having means for enabling passage of fluid between the interior and exterior thereof, said pipe being at least partially surrounded by an elongate length of said fluid transfer material.
  • the means for enabling passage of fluid between the interior and exterior of the pipe may comprise one or more apertures in the pipe.
  • the pipe may have at least one slot arranged in an upper part thereof in use.
  • the pipe may be porous.
  • Such a system may be used as a more efficient alternative or supplementary to back filling of trenches dug to lay drainage/irrigation pipes in.
  • Such a system has the important advantage of protecting the pipe from compressive forces.
  • the system can also filter and minimise the passage of solid contaminants in drainage water before they can be introduced to the pipe.
  • the system may be for drainage.
  • the system may be for irrigation.
  • a preferred method further comprises the step of preheating said mixture before it is placed in said mould.
  • the heating of said mixture is heated by the introduction of a heated gas into the mixture.
  • an irrigation and/or drainage system 1 comprises a generally cylindrical pipe 2 having slots (not shown), the pipe 2 being surrounded by an elongate length of a fluid transfer material 3 formed from a moulded mixture of shredded thermoplastics, shredded thermoset materials and organic and/or inorganic fibre.
  • a fluid transfer material 3 formed from a moulded mixture of shredded thermoplastics, shredded thermoset materials and organic and/or inorganic fibre.
  • the width of the length of material 3 is considerable greater in the region above the pipe 2 than in the vicinity of the pipe 2. This enables the material 3 to capture fluid from (or deliver fluid to) a large volume of ground.
  • Figure 2 shows a second embodiment of the irrigation and/or drainage system 11, which differs from the embodiment of Figure 1 in that the material 13 is of generally circular transverse cross section with the pipe 12 arranged at a lower part thereof.
  • a drainage and/or irrigation system 31 of a third embodiment comprises an elongate gutter 32 arranged below an elongate length of the fluid transfer material 33 described with reference to Figures 1 and 2 above and having the same shape as the material 3 of Figure 1.
  • the material 43 of the embodiment of Figure 4 has the same shape as the material 13 of figure 2.
  • a drainage/irrigation material 50 is placed at the boundary between the top soil 52 and subsoil 54.
  • the material 50 comprises thermoset 60 and fibrous material 62 which is melded together with thermoplastic material 64 such that interstices or air holes 66 are formed between the materials. It is through these interstices 66 that in use the fluid being drained or irrigated flows.
  • a drainage/irrigation material 70 is placed in a trench 72. Soil removed to create trench 72 will be replaced to cover the material 70.
  • the material 70 comprises thermoset 80 which is melded together with thermoplastic material 84 such that interstices or air holes 86 are again formed between the materials, and through which the movement of water occurs.
  • thermoplastics and at least one of the fibrous and thermoset materials are heated to a temperature above the melt point of the dominant thermoplastic of the mixture, mixed and being placed in a mould.
  • the mixture is heated in the mould by the introduction of hot air, providing an even distribution of heat.
  • the heating cf the thermoplastics allows them to meld or bond with themselves and with the other materials.
  • the material is then allowed to cool and set.
  • the cooling process can be speeded by the introduction of liquid nitrogen. Ultrasonic, infrared or microwave heating techniques may also be used to reach the required melt point temperature.
  • thermoplastics In order for the thermoplastics to meld with the other materials, it is necessary that the pieces of thermoplastics melt at least sufficiently so as to able to weld themselves to other thermoplastics and/or the other materials.
  • the above described embodiments can also be produced by extrusion. Hopper fed, straight barrel, straight screw, in-line or cross-head extruders are suitable systems for producing such materials.
  • the speed of production and pressure used within the extruder can be varied to produce various densities (ie more open or compact structure) of products for use in different circumstances and purposes.
  • liquid nitrogen can be used to assist in the cooling process, and ultrasonic heating techniques may be used to heat the mixture to the required temperature for extrusion.
  • the use of adhesives in addition or as an alternative to thermoplastics would reduce or eliminate the necessity for heating the mixture and cooling the resultant product.
  • a line or rope may be introduced to the middle of the product profile. Netting may also be wrapped around the outside of the product to assist in che handling of the product once manufactured. The netting may be wrapped around the outside of the product either completely or at least partially covering it. Alternatively a sleeve of netting maybe introduced.
  • thermoplastic is placed on the underside of the formed profile before it is cooled.
  • the retained heat in the newly formed profile is sufficient to meld the thermoplastic to the profile. If there is not enough residual heat, addition heat can applied to assist with the bonding process.
  • the material may also be used as a rooting media for hydroponics.
  • mica or vermiculite may be added to the mixture which hold some water, thereby increasing the retention time of water within the material.
  • chat fluid transfer systems with a high fibrous content are suitable for use as absorbent materials for substances such as oils, and can therefore be formed into oil absorbent booms for spillage control.
  • fluid transfer systems can be formed into mats or sections for laying under areas requiring intensive drainage and/or irrigation such as sports area including golfing greens.
  • a high thermoset and low or zero fibrous content material can be formed into mats or sections and used as part of a drainage system in the construction of roads.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cultivation Of Plants (AREA)
  • Road Paving Structures (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Pipeline Systems (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Claims (18)

  1. Matériau de transfert de fluide destiné à être utilisé dans un système pour transférer du fluide, le matériau de transfert de fluide comprenant :
    au moins une matière thermodurcie vulcanisée (60, 80) ; et
    au moins une matière thermoplastique (64, 84) fusionnée à celle-ci ;
    caractérisé par le fait qu'il y a suffisamment de matière thermodurcie pour créer une structure ouverte du matériau de transfert de fluide.
  2. Matériau de transfert de fluide selon la revendication 1, comprenant en outre au moins une matière fibreuse (62), de laquelle, conjointement avec la matière thermodurcie, il y a suffisamment pour créer ladite structure ouverte du matériau de transfert de fluide.
  3. Matériau de transfert de fluide selon l'une des revendications 1 ou 2, dans lequel au moins une matière thermodurcie précitée est hachée, déchiquetée ou fragmentée.
  4. Matériau de transfert de fluide selon l'une quelconque des revendications précédentes, dans lequel au moins une matière thermodurcie précitée comprend du caoutchouc, de préférence provenant de pneus recyclés de véhicules à moteur.
  5. Matériau de transfert de fluide selon la revendication 2, dans lequel au moins une matière fibreuse précitée comprend de la paille, du bois ou une matière minérale.
  6. Matériau de transfert de fluide selon l'une quelconque des revendications précédentes, dans lequel au moins une matière thermoplastique précitée est recyclée et, de préférence, hachée ou déchiquetée.
  7. Matériau de transfert de fluide selon l'une quelconque des revendications précédentes, dans lequel ledit matériau est au moins partiellement entouré par une nappe de filet, de préférence un filet à fines mailles.
  8. Matériau de transfert de fluide selon l'une quelconque des revendications précédentes, comprenant en outre du mica et/ou de la vermiculite.
  9. Système de transfert de fluide comprenant :
    un conduit pour transporter du fluide ; et
    un matériau de transfert de fluide tel que défini à l'une quelconque des revendications précédentes, le matériau de transfert de fluide coopérant avec ledit conduit pour transférer du fluide à celui-ci et/ou à partir de celui-ci.
  10. Système de transfert de fluide selon la revendication 9, dans lequel ledit conduit est une gouttière disposée, lors de utilisation, au-dessous d'une longueur allongée dudit matériau de transfert de fluide.
  11. Système de transfert de fluide selon la revendication 9, dans lequel ledit conduit est un tuyau allongé ayant un moyen pour permettre un passage de fluide entre l'intérieur et l'extérieur de celui-ci et ledit tuyau étant au moins partiellement entouré par une longueur allongée dudit matériau de transfert de fluide.
  12. Système de transfert de fluide selon la revendication 11, dans lequel ledit moyen pour permettre le passage de fluide entre l'intérieur et l'extérieur du tuyau comprend une ou plusieurs ouvertures dans le tuyau, ou au moins une fente disposée dans la partie supérieure dudit tuyau lors de l'utilisation, ou dans lequel ledit tuyau est poreux.
  13. Système de transfert de fluide selon l'une quelconque des revendications 9 à 12, dans lequel ledit système est utilisé pour le drainage ou pour l'irrigation.
  14. Procédé de fabrication d'un matériau de transfert de fluide comprenant les étapes consistant à :
    mélanger ensemble au moins une matière thermodurcie (60, 80), facultativement au moins une matière fibreuse (62), et au moins une matière thermoplastique (64, 84) afin de former un mélange ;
    placer ledit mélange dans un moule ; et
    chauffer ledit mélange de façon à provoquer le fusionnement de ladite ou desdites matières thermoplastiques aux autres matières, sachant qu'il y a suffisamment de matière thermodurcie, et de matière fibreuse lorsqu'elle est présente, pour créer une structure ouverte du matériau de transfert de fluide.
  15. Procédé selon la revendication 14, comprenant en outre l'étape de préchauffage dudit mélange avant qu'il ne soit placé dans ledit moule.
  16. Procédé selon l'une des revendications 14 ou 15, dans lequel ledit mélange est chauffé par l'introduction d'un gaz chauffé dans le mélange.
  17. Matériau de transfert de fluide destiné à être utilisé dans un système pour transférer du fluide, le matériau de transfert de fluide comprenant au moins une matière fibreuse (62) mélangée avec et fusionnée à au moins une matière thermoplastique (64).
  18. Matériau de transfert de fluide selon l'une quelconque des revendications 1 à 8, dans lequel ledit matériau est formé par un procédé d'extrusion.
EP00935309A 1999-06-01 2000-05-31 Materiau utilisable dans un systeme de transfert de fluide Expired - Lifetime EP1181417B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9912652 1999-06-01
GBGB9912652.6A GB9912652D0 (en) 1999-06-01 1999-06-01 Material for use in fluid transfer system
GB9925498 1999-10-29
GBGB9925498.9A GB9925498D0 (en) 1999-06-01 1999-10-29 Material for use in fluid transfer
PCT/GB2000/001968 WO2000073593A1 (fr) 1999-06-01 2000-05-31 Materiau utilisable dans un systeme de transfert de fluide

Publications (2)

Publication Number Publication Date
EP1181417A1 EP1181417A1 (fr) 2002-02-27
EP1181417B1 true EP1181417B1 (fr) 2005-08-10

Family

ID=26315615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00935309A Expired - Lifetime EP1181417B1 (fr) 1999-06-01 2000-05-31 Materiau utilisable dans un systeme de transfert de fluide

Country Status (11)

Country Link
EP (1) EP1181417B1 (fr)
JP (1) JP2003500578A (fr)
CN (1) CN1365410A (fr)
AT (1) ATE301741T1 (fr)
AU (1) AU780685B2 (fr)
DE (1) DE60021878T2 (fr)
DK (1) DK1181417T3 (fr)
ES (1) ES2245938T3 (fr)
HK (1) HK1045347A1 (fr)
PT (1) PT1181417E (fr)
WO (1) WO2000073593A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2399532B (en) * 2003-03-19 2007-10-24 Econoplas Ltd Method of manufacturing drainage/irrigation elements from recycled plastics
GB2431896B (en) * 2003-03-19 2007-10-31 Econoplas Ltd Drainage/Irrigation elements from recycled plastics
GB2426206A (en) * 2005-05-17 2006-11-22 Econoplas Ltd Turf Tiles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK150061C (da) * 1981-05-26 1987-12-21 Clean Tex As Vaskbar vand- og snavsbindende renholdelsesmaatte, hvor bagsidelaget ikke lader vand passere under maattens normale brug
GB2201872B (en) * 1987-02-07 1990-08-22 Edward Maynes Drainage assembly
DE4217739A1 (de) * 1992-05-29 1993-02-04 Waldemar Kallenberg Draensickermatte aus plastmaterial durch recycling
DE9306039U1 (fr) * 1992-10-17 1993-07-22 Luedecke, Adolf, 37154 Northeim, De

Also Published As

Publication number Publication date
AU5086300A (en) 2000-12-18
HK1045347A1 (en) 2002-11-22
EP1181417A1 (fr) 2002-02-27
CN1365410A (zh) 2002-08-21
DK1181417T3 (da) 2005-10-24
DE60021878T2 (de) 2006-05-24
ATE301741T1 (de) 2005-08-15
PT1181417E (pt) 2005-11-30
JP2003500578A (ja) 2003-01-07
ES2245938T3 (es) 2006-02-01
DE60021878D1 (de) 2005-09-15
AU780685B2 (en) 2005-04-14
WO2000073593A1 (fr) 2000-12-07

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