WO2006099663A1 - A device for and method of delivering superheated liquid and gas for biocidal treatment - Google Patents

A device for and method of delivering superheated liquid and gas for biocidal treatment Download PDF

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Publication number
WO2006099663A1
WO2006099663A1 PCT/AU2006/000368 AU2006000368W WO2006099663A1 WO 2006099663 A1 WO2006099663 A1 WO 2006099663A1 AU 2006000368 W AU2006000368 W AU 2006000368W WO 2006099663 A1 WO2006099663 A1 WO 2006099663A1
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WO
WIPO (PCT)
Prior art keywords
wand
inner tube
heated
outer tube
water
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.)
Ceased
Application number
PCT/AU2006/000368
Other languages
French (fr)
Inventor
John Burton
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
Priority claimed from AU2005901364A external-priority patent/AU2005901364A0/en
Application filed by Individual filed Critical Individual
Priority to AU2006227598A priority Critical patent/AU2006227598A1/en
Priority to US11/909,172 priority patent/US20080190016A1/en
Priority to EP20060721263 priority patent/EP1865768A1/en
Publication of WO2006099663A1 publication Critical patent/WO2006099663A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M19/00—Apparatus for the destruction of noxious animals, other than insects, by hot water, steam, hot air, or electricity
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M21/00—Apparatus for the destruction of unwanted vegetation, e.g. weeds
    • A01M21/04—Apparatus for destruction by steam, chemicals, burning, or electricity
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/6416—With heating or cooling of the system

Definitions

  • the present invention relates to a device for and method of delivering superheated liquid and gas such as water and air, in particular for biocidal treatment of vegetation and/or pests.
  • the inventor of the present invention has discovered that the temperature of air at the wand of a biocidal treatment device is critical to the extent that a reduction in the air temperature at the wand dramatically alters the effectiveness of the biocidal treatment.
  • a device for biocidal treatment of vegetation and/or pests comprising: an inner tube connectable to a source of one of heated pressurised gas and heated pressurised water; an outer tube disposed over the inner tube so that a space is defined between the inner tube and the outer tube, the outer tube being connectable to a source of the other of heated pressurised gas and heated pressurised water,- and a wand in communication with the inner tube and the outer tube, the wand having an outlet aperture; wherein the heated air and water mix in the wand immediately prior to passing through the outlet aperture.
  • the outer tube may form part of a manifold, the outer tube and the inner tube defining a first annular space and the manifold comprising a branch tube in fluid communication with the first annular space.
  • the device further comprises a flexible hose extending from the inner and outer tubes to the wand, the inner tube extending through the hose to the wand, and the inner tube and the hose defining a second annular space in fluid communication with the first annular space.
  • the device may further comprise a first quick release connection associated with heated air to be dispensed by the device and a second quick release connection associated with heated water to be dispensed by the device, the first and second connections being connectable to a source of pressurised heated air and water.
  • the inner tube may formed of Teflon material .
  • the device further comprises insulation disposed around at least part of the outer tube, and/or the wand.
  • the device further comprises insulation disposed around at least part of the hose.
  • a method of biocidally treating vegetation and/or pests comprising: providing an inner tube,- connecting the inner tube to a source of one of heated pressurised gas and heated pressurised water; providing an outer tube over the inner tube so that a space is defined between the inner tube and the outer tube; connecting the outer tube to a source of the other of heated pressurised gas and heated pressurised water,- providing a wand in communication with the inner tube and the outer tube, the wand having an outlet aperture; and mixing heated air and water in the wand immediately prior to passing through the outlet aperture.
  • Figure 1 is a cross sectional view of a device for delivering superheated liquid and gas for biocidal treatment in accordance with an embodiment of the present invention.
  • Figure 2 is a cross-sectional view of a manifold of the device shown in Figure 1.
  • a device 10 for delivering superheated liquid and air for biocidal treatment there is shown a device 10 for delivering superheated liquid and air for biocidal treatment .
  • the device 10 is used for delivering superheated water and air for biocidal treatment, although it will be understood that other gases and liquids may be used, the important aspect being that when the liquid and gas are heated to a sufficient temperature, the liquid and gas are capable of biocidally treating vegetation and pests.
  • the device 10 is connectable to a suitable source of gas and liquid, in this example a source 12 of heated pressurised air and pressurised superheated water.
  • a source 12 for this purpose, the source 12 includes an air outlet 14 and a water outlet 16.
  • the air and water outlets 14, 16 are of quick-release type so as to enable the device 10 to be selectively easily released from engagement with the source 12.
  • other connection arrangements are envisaged.
  • the device 10 includes a manifold 18 releasably connectable to the source 12 of the pressurised heated air and pressurised superheated water, a flexible hose 20, in this example formed of heat resistant rubber material, and a wand 22 provided with a nozzle 24.
  • the manifold 18 in this example is formed of stainless steel material, although it will be understood that any suitable heat resistant relatively strong material is envisaged.
  • the manifold 18 includes an outer tube 26 integral with a branch tube 28. Extending through the outer tube 26 is an inner tube 30, in this example formed of heat resistant material with a low coefficient of expansion, such as Teflon tubing.
  • the inner tube 30 also extends through the hose 20 and into the wand 22, an end of the inner tube 30 opening into the wand 22.
  • the outer tube 26 and the inner tube 30 define a first annular space 32 in fluid communication with the branch tube 28.
  • the hose 20 and the inner tube 30 define a second annular space 34 in fluid communication with the first annular space 32.
  • the second annular space 34 is in fluid communication with the wand 22.
  • the wand 22 may be formed of any suitably strong heat resistant material, in this example aluminium.
  • pressurised heated air flows through the inner tube 30 and thereby directly into the wand 22.
  • pressurised superheated water flows through the branch tube 28, the first and second annular spaces 32, 34 and into the wand 22.
  • pressurised air and pressurised superheated water are kept separate by the device 10 until the air and water reach the wand 22. At the wand 22, the air and water mix and are ejected from the nozzle 24.
  • the aluminum wand may have an insulation layer with a PVC outer casing to stop heat loss and to protect the human operator from the heat of the application wand.
  • the inner tube 30 which carries the heated pressurised air is disposed inside the outer tube 26 and hose 30 which carry the pressurised superheated water, the temperature of the air at the wand 22 can be maintained relatively high and thereby the efficiency of the biocidal treatment device maintained relatively high.
  • the outer and branch tubes 26, 28 of the manifold 18 are provided with first and second quick release couplings 36 and 38 respectively, the first and second quick release couplings 36, 38 being connected to the outer and branch tubes 26, 28 using first and second screw threaded portions 40 and 42 respectively.
  • the hose 20 may be fixed to the outer tube 26 in any suitable way, for example using a clamp 44.
  • the tubes and/or hose of the device described may be protected with an appropriate insulation layer.
  • Disposed over the hose insulation layer may be a neoprene jacket and a nylon spiral wrap to protect against abrasion when dragging the hose on the ground.
  • heated pressurized air flows through the inner tube and heated pressurized water flows through the annular space between the inner tube and the outer tube
  • heated pressurized water may flow through the inner tube and heated pressurized air may flow through the annular space between the inner tube and the outer tube .

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Catching Or Destruction (AREA)

Abstract

A device (10) is disclosed for biocidal treatment of vegetation and/or pests, the device (10) comprising an inner tube (30) connectable to a source of one of heated pressurised gas and heated pressurised water, an outer tube (26) disposed over the inner tube so that a space is defined between the inner tube and the outer tube, and a wand (22) in communication with the inner tube (30) and the outer tube (26). The wand (22) has an outlet aperture and the outer tube (26) is connectable to a source of the other of heated pressurised gas and heated pressurised water. The heated air and water mix in the wand (22) immediately prior to passing through the outlet aperture.

Description

A DEVICE FOR AND METHOD OF DELIVERING SUPERHEATED LIQUID AND GAS FOR BIOCIDAL TREATMENT
Field of Invention
The present invention relates to a device for and method of delivering superheated liquid and gas such as water and air, in particular for biocidal treatment of vegetation and/or pests.
Background of the Invention
It is known to effect vegetation and pest control by direct application of heat including the application, at elevated temperatures, of water, foam and/or air, or application of flames.
Traditionally, the delivery of pressurised superheated water and air for the biocidal treatment of vegetation and pests has been through the use of separate tubes joined at an application wand. However, this method results in the tubes and associated insulative and protective layers being heavy to use when connected to the wand. In addition, since the air is conveyed into the wand typically using a 20 metre hose, the air is often at or close to ambient temperature even if the air has been heated prior to entering the tube due to a heat exchange effect between the air hose and the outside ambient air temperature. The traditional hose arrangement described above is also inconvenient to attach and detach from the heating equipment since attachment and detachment requires the use of spanners .
Summary of the Invention
The inventor of the present invention has discovered that the temperature of air at the wand of a biocidal treatment device is critical to the extent that a reduction in the air temperature at the wand dramatically alters the effectiveness of the biocidal treatment.
In accordance with a first aspect of the present invention, there is provided a device for biocidal treatment of vegetation and/or pests, the device comprising: an inner tube connectable to a source of one of heated pressurised gas and heated pressurised water; an outer tube disposed over the inner tube so that a space is defined between the inner tube and the outer tube, the outer tube being connectable to a source of the other of heated pressurised gas and heated pressurised water,- and a wand in communication with the inner tube and the outer tube, the wand having an outlet aperture; wherein the heated air and water mix in the wand immediately prior to passing through the outlet aperture.
In this way, since the inner tube carrying one of air and water is disposed inside the outer tube carrying the other of air and water, the temperature of the air and water at the wand remains relatively high. In addition, cumbersome tube arrangements are avoided.
The outer tube may form part of a manifold, the outer tube and the inner tube defining a first annular space and the manifold comprising a branch tube in fluid communication with the first annular space.
In one arrangement, the device further comprises a flexible hose extending from the inner and outer tubes to the wand, the inner tube extending through the hose to the wand, and the inner tube and the hose defining a second annular space in fluid communication with the first annular space. The device may further comprise a first quick release connection associated with heated air to be dispensed by the device and a second quick release connection associated with heated water to be dispensed by the device, the first and second connections being connectable to a source of pressurised heated air and water.
The inner tube may formed of Teflon material .
In one arrangement, the device further comprises insulation disposed around at least part of the outer tube, and/or the wand.
In one arrangement, the device further comprises insulation disposed around at least part of the hose.
In accordance with a first aspect of the present invention, there is provided a method of biocidally treating vegetation and/or pests, the method comprising: providing an inner tube,- connecting the inner tube to a source of one of heated pressurised gas and heated pressurised water; providing an outer tube over the inner tube so that a space is defined between the inner tube and the outer tube; connecting the outer tube to a source of the other of heated pressurised gas and heated pressurised water,- providing a wand in communication with the inner tube and the outer tube, the wand having an outlet aperture; and mixing heated air and water in the wand immediately prior to passing through the outlet aperture. Description of the Drawings
The present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a cross sectional view of a device for delivering superheated liquid and gas for biocidal treatment in accordance with an embodiment of the present invention; and
Figure 2 is a cross-sectional view of a manifold of the device shown in Figure 1.
Detailed Description of an Embodiment of the Invention
Referring to the drawings, there is shown a device 10 for delivering superheated liquid and air for biocidal treatment .
In the present example, the device 10 is used for delivering superheated water and air for biocidal treatment, although it will be understood that other gases and liquids may be used, the important aspect being that when the liquid and gas are heated to a sufficient temperature, the liquid and gas are capable of biocidally treating vegetation and pests.
The device 10 is connectable to a suitable source of gas and liquid, in this example a source 12 of heated pressurised air and pressurised superheated water. For this purpose, the source 12 includes an air outlet 14 and a water outlet 16. In this example, the air and water outlets 14, 16 are of quick-release type so as to enable the device 10 to be selectively easily released from engagement with the source 12. However, it will be understood that other connection arrangements are envisaged.
The device 10 includes a manifold 18 releasably connectable to the source 12 of the pressurised heated air and pressurised superheated water, a flexible hose 20, in this example formed of heat resistant rubber material, and a wand 22 provided with a nozzle 24.
The manifold 18 in this example is formed of stainless steel material, although it will be understood that any suitable heat resistant relatively strong material is envisaged.
The manifold 18 includes an outer tube 26 integral with a branch tube 28. Extending through the outer tube 26 is an inner tube 30, in this example formed of heat resistant material with a low coefficient of expansion, such as Teflon tubing.
As can be seen in Figure 1, the inner tube 30 also extends through the hose 20 and into the wand 22, an end of the inner tube 30 opening into the wand 22. The outer tube 26 and the inner tube 30 define a first annular space 32 in fluid communication with the branch tube 28. Likewise, the hose 20 and the inner tube 30 define a second annular space 34 in fluid communication with the first annular space 32. The second annular space 34 is in fluid communication with the wand 22.
The wand 22 may be formed of any suitably strong heat resistant material, in this example aluminium.
During use, when the device 10 is engaged with the source 12 of pressurised heated air and pressurised superheated water, pressurised heated air flows through the inner tube 30 and thereby directly into the wand 22. At the same time, pressurised superheated water flows through the branch tube 28, the first and second annular spaces 32, 34 and into the wand 22.
It will be understood that the pressurised air and pressurised superheated water are kept separate by the device 10 until the air and water reach the wand 22. At the wand 22, the air and water mix and are ejected from the nozzle 24.
The pressurised air and water mix in the application wand before exiting the wand under pressure and at an ideal velocity of around 60 kmh to take advantage of the wind chill effect.
The aluminum wand may have an insulation layer with a PVC outer casing to stop heat loss and to protect the human operator from the heat of the application wand.
It will be understood that by ensuring that the air and water do not mix until immediately prior to ejection from the wand 22, the temperature of the ejected air and water can be maintained relatively high and thereby the efficiency of the biocidal treatment device maintained relatively high.
It will also be appreciated that since the inner tube 30 which carries the heated pressurised air is disposed inside the outer tube 26 and hose 30 which carry the pressurised superheated water, the temperature of the air at the wand 22 can be maintained relatively high and thereby the efficiency of the biocidal treatment device maintained relatively high.
As shown more particularly in Figure 2, the outer and branch tubes 26, 28 of the manifold 18 are provided with first and second quick release couplings 36 and 38 respectively, the first and second quick release couplings 36, 38 being connected to the outer and branch tubes 26, 28 using first and second screw threaded portions 40 and 42 respectively.
The hose 20 may be fixed to the outer tube 26 in any suitable way, for example using a clamp 44.
The tubes and/or hose of the device described may be protected with an appropriate insulation layer. Disposed over the hose insulation layer may be a neoprene jacket and a nylon spiral wrap to protect against abrasion when dragging the hose on the ground.
While the above embodiment is described in relation to a device wherein heated pressurized air flows through the inner tube and heated pressurized water flows through the annular space between the inner tube and the outer tube, it will be understood that as an alternative, heated pressurized water may flow through the inner tube and heated pressurized air may flow through the annular space between the inner tube and the outer tube .
Modifications and variations as would be apparent to a skilled addressee are deemed to be within the scope of the present invention.

Claims

CLAIMS ;
1. A device for biocidal treatment of vegetation and/or pests, the device comprising: an inner tube connectable to a source of one of heated pressurised gas and heated pressurised water; an outer tube disposed over the inner tube so that a space is defined between the inner tube and the outer tube, the outer tube being connectable to a source of the other of heated pressurised gas and heated pressurised water; and a wand in communication with the inner tube and the outer tube, the wand having an outlet aperture; wherein the heated air and water mix in the wand immediately prior to passing through the outlet aperture.
2. A device as claimed in claim 1, wherein the outer tube forms part of a manifold, the outer tube and the inner tube defining a first annular space and the manifold comprising a branch tube in fluid communication with the first annular space.
3. A device as claimed in claim 1 or claim 2, further comprising a flexible hose extending from the inner and outer tubes to the wand, the inner tube extending through the hose to the wand, and the inner tube and the hose defining a second annular space in fluid communication with the first annular space.
4. A device as claimed in any one of the preceding claims, further comprising a first quick release connection associated with heated air to be dispensed by the device and a second quick release connection associated with heated water to be dispensed by the device, the first and second connections being connectable to a source of pressurised heated air and water.
5. A device as claimed in any one of the preceding claims, wherein the inner tube is formed of Teflon material .
6. A device as claimed in any one of the preceding claims, further comprising insulation disposed around at least part of the outer tube, and/or the wand.
7. A device as claimed in claim 3, further comprising insulation disposed around at least part of the hose.
8. A method of biocidally treating vegetation and/or pests, the method comprising: providing an inner tube; connecting the inner tube to a source of one of heated pressurised gas and heated pressurised water; providing an outer tube over the inner tube so that a space is defined between the inner tube and the outer tube ; connecting the outer tube to a source of the other of heated pressurised gas and heated pressurised water; providing a wand in communication with the inner tube and the outer tube, the wand having an outlet aperture; and mixing heated air and water in the wand immediately prior to passing through the outlet aperture.
PCT/AU2006/000368 2005-03-21 2006-03-20 A device for and method of delivering superheated liquid and gas for biocidal treatment Ceased WO2006099663A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2006227598A AU2006227598A1 (en) 2005-03-21 2006-03-20 A device for and method of delivering superheated liquid and gas for biocidal treatment
US11/909,172 US20080190016A1 (en) 2005-03-21 2006-03-20 Device for and Method of Delivering Superheated Liquid and Gas for Biocidal Treatment
EP20060721263 EP1865768A1 (en) 2005-03-21 2006-03-20 A device for and method of delivering superheated liquid and gas for biocidal treatment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2005901364A AU2005901364A0 (en) 2005-03-21 A device for and method of delivering superheated liquid and gas for biocidal treatment
AU2005901364 2005-03-21

Publications (1)

Publication Number Publication Date
WO2006099663A1 true WO2006099663A1 (en) 2006-09-28

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PCT/AU2006/000368 Ceased WO2006099663A1 (en) 2005-03-21 2006-03-20 A device for and method of delivering superheated liquid and gas for biocidal treatment

Country Status (3)

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US (1) US20080190016A1 (en)
EP (1) EP1865768A1 (en)
WO (1) WO2006099663A1 (en)

Cited By (1)

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CN104770351A (en) * 2015-03-26 2015-07-15 淮南东正电子科技有限公司 Ready-to-use pesticide mixing device

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GB2485457A (en) * 2010-11-09 2012-05-16 Weeding Technologies Ltd Weed control apparatus

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US5575111A (en) * 1995-09-28 1996-11-19 Rajamannan; A. H. J. Method of using hot air foam to kill vegetation and pests
FR2753516A1 (en) * 1996-09-18 1998-03-20 Tecnoma Portable liquid sprayer for treatment of vegetation with herbicides
WO2000022926A1 (en) * 1998-10-20 2000-04-27 Origin Energy Lpg Limited Weed and plant pests control apparatus and method
AU721456B3 (en) * 1999-09-23 2000-07-06 Multi-Vision Group Pty Ltd Method of generating a treatment fluid
JP2002065138A (en) * 2000-08-25 2002-03-05 Kaneko Agricult Mach Co Ltd Weeding equipment
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WO1996003036A1 (en) * 1994-07-28 1996-02-08 Darren Charles Adey Weed killing method and apparatus
US5575111A (en) * 1995-09-28 1996-11-19 Rajamannan; A. H. J. Method of using hot air foam to kill vegetation and pests
FR2753516A1 (en) * 1996-09-18 1998-03-20 Tecnoma Portable liquid sprayer for treatment of vegetation with herbicides
WO2000022926A1 (en) * 1998-10-20 2000-04-27 Origin Energy Lpg Limited Weed and plant pests control apparatus and method
AU721456B3 (en) * 1999-09-23 2000-07-06 Multi-Vision Group Pty Ltd Method of generating a treatment fluid
JP2002065138A (en) * 2000-08-25 2002-03-05 Kaneko Agricult Mach Co Ltd Weeding equipment
WO2004070269A2 (en) * 2003-02-07 2004-08-19 Steven Vaughan Portable steam and heat generator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104770351A (en) * 2015-03-26 2015-07-15 淮南东正电子科技有限公司 Ready-to-use pesticide mixing device

Also Published As

Publication number Publication date
US20080190016A1 (en) 2008-08-14
EP1865768A1 (en) 2007-12-19

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