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WO2003016638A1 - Ramassage de matieres au moyen d'un ecoulement d'air - Google Patents

Ramassage de matieres au moyen d'un ecoulement d'air Download PDF

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Publication number
WO2003016638A1
WO2003016638A1 PCT/AU2002/001111 AU0201111W WO03016638A1 WO 2003016638 A1 WO2003016638 A1 WO 2003016638A1 AU 0201111 W AU0201111 W AU 0201111W WO 03016638 A1 WO03016638 A1 WO 03016638A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
gap
pressure
lowermost part
passageway
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/AU2002/001111
Other languages
English (en)
Inventor
Kevin Ross Inkster
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.)
Arbortech Pty Ltd
Original Assignee
Arbortech Pty Ltd
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 Arbortech Pty Ltd filed Critical Arbortech Pty Ltd
Publication of WO2003016638A1 publication Critical patent/WO2003016638A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/14—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum cleaning by blowing-off, also combined with suction cleaning
    • 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
    • A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
    • A01G20/40—Apparatus for cleaning the lawn or grass surface
    • A01G20/43—Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
    • A01G20/47—Vacuum or blower devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/04—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids for using the exhaust air for other purposes, e.g. for distribution of chemicals in a room, for sterilisation of the air
    • A47L7/06—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids for using the exhaust air for other purposes, e.g. for distribution of chemicals in a room, for sterilisation of the air for supporting the suction cleaner on the exhaust air
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0863—Apparatus loosening or removing the dirt by blowing and subsequently dislodging it at least partially by suction ; Combined suction and blowing nozzles

Definitions

  • This invention relates to material collection including apparatus for this purpose and a method for effecting material collection.
  • a material collector being a body adapted to be passed across a target surface on which surface there is material of a particulate and/or liquid form to be collected, the body having a lowermost part providing a surface for defining between it and the target surface, a gap providing an air passageway, a source of air at a pressure above atmospheric pressure to provide for the passage of air from a first side of the lowermost part to pass through the gap to a second side of the lowermost part the flow rate and size of the gap being such as to effect an entrainment of materials on the surface being encountered and to carry this to the said second side, and at least one passageway including a mouth connected to a means adapted to effect a flow of air into the mouth by effecting a below atmospheric pressure of air within the passageway, said mouth being located so that at least some of the material entrained by the passage of air through the air passageway defined in part by the lowermost part, will be drawn through said mouth into the passageway.
  • a material collector with air being directed below a lowermost part of a body which defines between it and a target surface, a gap and has air being driven by a pressure above atmospheric directed so as to collect material as it passes between the respective surfaces by reason of the level of pressure and the size of the gap, and a collection means in a downstream location to collect said material upon exit through the gap.
  • the height of the gap is a variable distance which is determined by the result of a pressure to close the gap which is resisted by the aerodynamic characteristics of the air flow through the gap providing a gap opening pressure.
  • the lowermost part is provided by a material that is of a pliable characteristic.
  • the body is supported above the surface, at least in the main, by air at pressure above atmospheric pressure.
  • the air at above atmospheric pressure effecting support of the body is also the same body of air that is causing exiting of air through the air passageway defined in part by the lowermost part defining a periphery of a plenum.
  • the body is adapted to be supported at least in the main by air within a plenum causing the body to hover above the surface with the lowermost part being above the surface by a distance determined by the hover or air cushion effect.
  • the lowermost part has a streamline shape for airflow for air passing through the air passageway which is also of advantage at an exiting location where a coanda effect may urge air to follow up and around the skirt shape (it is felt currently that the nature of the air flow especially immediately through the narrowest portion of any gap is at least predominantly turbulent as compared to lamina).
  • the body is in the form of an air cushion style vehicle.
  • the passageway connected to the mouth or mouths directs air being sucked through the mouth into a separator where material entrained is adapted to be separated from the air.
  • the body is adapted to be a hover or air cushion type vehicle and the mouth or mouths for collection of air with entrained material is positioned to collect air and subsequently entrained material where this has been blown from beneath the lowermost part defining a gap and which is a forward portion of the periphery of the vehicle.
  • the invention can be said to reside in a method of collecting material where the material is on a surface and is in the form of particulate material and/or liquid, including the steps of having a body with a lowermost part so that the lowermost part defines between it and the surface, an air passageway which is a gap, and effecting passage of air through such gap where the air is at a higher than atmospheric pressure on an upstream side of the gap, and effecting a collection of any materials subsequent to passage through the passageway by effecting a suction through a mouth or mouths in the vicinity of the exiting air from the gap.
  • the lowermost part of the body defining the passageway is supported by an air cushioning effect between the body and the surface.
  • Figure 1 is a plan view of the embodiment
  • Figure 2 is a cross-section along the lines to 2 of the embodiment shown in Figure 1;
  • Figure 3 is an enlargement of the front portion of the cross-section as shown in Figure 2;
  • Figure 4 is a perspective view of the embodiment which is the subject of the preceding Figures 1 , 2 and 3.
  • a body 1 which supports elements appropriate for providing air cushion support including a surrounding peripheral lowermost inflated curtain 2, a motor 3 which drives a fan 4 which then effects a buildup of air pressure within an underneath pressure or plenum area generally shown at 5.
  • the inflated curtain 2 is located so as to be fully beneath a periphery of the body 1.
  • the shape in cross section of the curtain 2 when inflated is such as to facilitate passage of the body over obstacles so that where it has a rounded shape this therefore provides a forward taper at a lowermost outer edge.
  • this tapered shape helps the curtain or skirt to ride over this obstacle by assisting in a lifting of that section of the skirt.
  • This skirt shape which provides both for the function of assisting closure against release of the air in the plenum and this tapered shape to assist the ride over effect is provided by a pliable wall that is able to change its shape under some external pressures.
  • the gap beneath the skirt is therefore defined by the lowermost surface of the curtain or skirt 2.
  • the principle of an air cushion vehicle is that it is lifted by a sufficient pressure of air in its plenum area.
  • a gap beneath the curtain or skirt is effected when the vehicle is in its lifted mobile condition and this implicitly allows for air to release.
  • a discovery of this invention has been that, in the conditions applicable with a lifted air cushion vehicle, that ground defining a lowermost surface of the gap beneath the curtain or skirt is subjected to a very effective scouring with particles and liquids on the ground being caught and transported out from beneath the gap area and in some cases being carried up and around the skirt shape. The extent and efficiency to which this effect occurs is observed to be of a very high order indeed.
  • the height of the gap is determined by the weight of the vehicle as a whole as applicable to a particular area, the pressure within the plenum chamber and the characteristic of any air flow as it passes beneath the gap. It is known that in the case of streamline flow there will be a Bernoulli suction effect that will cause the adjacent surfaces to be urged together which is also assisted by the weight of the vehicle. However, as any gap gets smaller there is an inevitable result from our understanding of physical phenomenon that the flow will become more turbulent. With turbulent flow (Reynolds number > 1) there will be an outward expansive pressure rather than an inward sucking pressure. Therefore, as the gap gets smaller we can expect a higher degree of turbulence.
  • the observed effect is that the gap size stabilizes where there is a sufficient extent of turbulence that maintains a sufficient degree of outward pressure to keep lifted the vehicle as a whole. However, with a substantial body weight this will mean that the gap will be expected to have a high level of turbulence to provide a sufficient countering lift. (This turbulence also assists in keeping restricted the rate of release of air from the plenum).
  • the effect is observed to be a stable one provided that there are not external effects such as inertia effects or resilient retentions that may set up some vibratory frequency effect. It is felt that the pliable nature of the underneath surface of the curtain of skirt is of assistance here.
  • the air cushion vehicle being shown in this embodiment illustrates a particular form of air cushion vehicle but it is well recognized that there are a very large number of different varieties of such vehicles now available so that this illustration is given to show one example only and it is clear that many other embodiments are appropriate for this particular invention.
  • the unit being shown in this embodiment has features which are different from many other air cushion vehicles including a rearward drive wheel system at 6 which provides, as desired by reason of balance of orientation of the body 1 , a drive of the vehicle while generally being suspended by an air cushion effected by reason of contact with the ground over which the body is being supported.
  • brushes one to each side are freely rotatable but arranged so that if the body 1 is then tilted so as to bring the brush into contact with the ground, then there will be a resultant retarding influence on the direction of the body 1.
  • the body 1 also includes an upwardly projecting handle 8 so that a single rider standing on the body 1 somewhat midway from front to back and holding handle 8, can control the forward and sideways direction of the vehicle by altering weight distribution so that one part of the body 1 is lower to the ground surface as compared to another part and as appropriate is therefore caused to contact either the drive wheel 6 or a brush such as at 7.
  • a mouth 10 which is connected to a manifold 11 which leads through conduits such as at 12 and 13 to a source where the pressure is reduced to below atmospheric pressure.
  • turbo separators at 14 and 15 which are arranged to cause suspended particulate materials in any airflow being introduced from passages 12 in the one case or 13 in the other to be spun out and caused to settle and therefore be collected while there is a passageway at 16 in one case and 17 in the other that continues the connection of air below atmospheric pressure into the air intake provided by the fan 4.
  • the position of the mouth 10 of the manifold 11 is so that it extends from one side at 18 around a front of the body 1 to the other side at 19. Further however, the position shape and size of the mouth and extent of vacuum below atmospheric is chosen so that entrained particles resulting from turbulent flow through the gap will be induced to enter into the mouth. While the drawing illustrates one specific case which gives a best result in one circumstance we have found that it is very helpful to adjust these factors in each case to take account of actual variations. The effect is assisted by a coanda effect where the air and entrained material will have a tendency to follow the outerwall shape of the skirt to a suitably located collection location.
  • Both of the passageways 12 and 13 connect into the manifold so as to draw air equally from the respective sides so that there is an extension of the suction effect by reason of the air being below atmospheric pressure and therefore sucking from the mouth that is open through this full arc, that is from the location 18 around the front to the location 19.
  • this mouth 10 is chosen so that particulate material and/or fluid that has been captured within an air stream shown at 20 and being temporarily suspended thereby, will then be caught by the air flow being directed into the mouth 10 and will then be continued to be kept in suspension until being captured by the entry into the respective passageways 12 and 13.
  • This air being at a pressure above atmospheric can accordingly be substantially above atmospheric if desired but by reason of this both being directed in the sense of being radially directed out from the body 1 and being caused to flow between the narrow gap defined by a lowermost part of the skirt 2 at 21 and a ground surface at 22, means that the air will be caused to blast with penetrating and effective force through this narrow gap.
  • the height of this gap to an extent is of course determined by the characteristics of the body 1 and its total hovercraft or cushion vehicle characteristics including the weight that it must indeed lift.
  • the location of the mouth can be changed to accord with differing circumstances but is arranged so that it will generally collect if not all nonetheless a substantial amount of the material that is caused to be suspended by the air passing beneath the curtain 2.
  • the underneath shape of the skirt at 21 follows an arcuate shape which is convex and this may be expected at first sight to cause a streamline flow effect. However, as has been previously explained it is now reasoned that this is superficial and the effect is in fact that there will be a turbulent effect created.
  • the mouth is located only at a respective side of the vehicle, it is found that this can also be useful in that when the body 1 passes across an area, the particles or liquid will be pushed aside and then at the widest extremity of the vehicle, there will be a single collective lifting of this on each side where a collection mouth with pressure below atmospheric can be located to collect these.
  • a triangular shape of the periphery of the body is desirable because it will can effectively sweep particles to the sides where they can be picked up by collectors at the rear corners.
  • This is a useful configuration especially in industrial applications especially where it can allow for corners to be more usefully accessed.
  • this embodiment was able to collect material of the same character of an area over one hundred times larger in a time that at the least is similar for the leaf blower of a very much lower area.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)

Abstract

L'invention concerne un véhicule supporté par un coussin d'air, comportant un corps circulaire (1) sur lequel un utilisateur en position debout tient une poignée (8) et change la direction du véhicule en modifiant sa distribution pondérale. L'air servant à porter le véhicule peut également être utilisé pour enlever des détritus, des feuilles, etc. recouvrant de vastes étendues. Un moteur (3) actionne un ventilateur (4) pour fournir ledit coussin d'air de support à une chambre de distribution (5) entourée par une jupe souple gonflable (2). L'écoulement d'air turbulent s'échappant par la partie avant inférieure de ladite jupe (2) enlève les particules et liquides de la surface à traiter (22) par frottement. Ces particules et liquides sont introduits (grâce entre autres à l'effet Coanda) dans un canal périphérique (10) puis menés, par aspiration, au travers de passages jusqu'à des séparateurs de type cycloniques du véhicule.
PCT/AU2002/001111 2001-08-17 2002-08-19 Ramassage de matieres au moyen d'un ecoulement d'air Ceased WO2003016638A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPR7067A AUPR706701A0 (en) 2001-08-17 2001-08-17 Material collection improvement
AUPR7067 2001-08-17

Publications (1)

Publication Number Publication Date
WO2003016638A1 true WO2003016638A1 (fr) 2003-02-27

Family

ID=3831022

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2002/001111 Ceased WO2003016638A1 (fr) 2001-08-17 2002-08-19 Ramassage de matieres au moyen d'un ecoulement d'air

Country Status (2)

Country Link
AU (1) AUPR706701A0 (fr)
WO (1) WO2003016638A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007068922A3 (fr) * 2005-12-13 2007-11-01 Scotcan Ltd Appareil aspirateur ameliore
RU169250U1 (ru) * 2016-03-31 2017-03-13 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный горный университет" (ФГБОУ ВО "УГГУ") Транспортное средство для пылеулавливания
RU169496U1 (ru) * 2016-05-16 2017-03-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный горный университет" (ФГБОУ ВО "УГГУ") Транспортное средство для пылеулавливания
US10464668B2 (en) 2015-09-02 2019-11-05 Jetoptera, Inc. Configuration for vertical take-off and landing system for aerial vehicles
US10875658B2 (en) 2015-09-02 2020-12-29 Jetoptera, Inc. Ejector and airfoil configurations
US11001378B2 (en) 2016-08-08 2021-05-11 Jetoptera, Inc. Configuration for vertical take-off and landing system for aerial vehicles
US11148801B2 (en) 2017-06-27 2021-10-19 Jetoptera, Inc. Configuration for vertical take-off and landing system for aerial vehicles
WO2025082746A3 (fr) * 2023-10-16 2025-05-30 Bucher Municipal Limited Améliorations apportées à des ensembles d'aspiration arrière de véhicule de nettoyage routier

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1208123A1 (ru) * 1983-12-21 1986-01-30 Техническое Управление Исполкома Ленсовета Транспортное средство дл уборки дорожных покрытий
JPH06327589A (ja) * 1993-05-26 1994-11-29 Sharp Corp 排気圧浮上式電気掃除機
US5768744A (en) * 1992-09-26 1998-06-23 Hamilton; Robin Self-propelled waste collection vehicle
JPH11155771A (ja) * 1997-11-27 1999-06-15 Toshiba Tec Corp 電気掃除機
US5930864A (en) * 1994-02-16 1999-08-03 Matsushita Electric Industrial Co., Ltd. Upright vacuum cleaner
WO2000076289A2 (fr) * 1999-06-15 2000-12-21 Arbortech Industries Ltd. Planche a flux d'air

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1208123A1 (ru) * 1983-12-21 1986-01-30 Техническое Управление Исполкома Ленсовета Транспортное средство дл уборки дорожных покрытий
US5768744A (en) * 1992-09-26 1998-06-23 Hamilton; Robin Self-propelled waste collection vehicle
JPH06327589A (ja) * 1993-05-26 1994-11-29 Sharp Corp 排気圧浮上式電気掃除機
US5930864A (en) * 1994-02-16 1999-08-03 Matsushita Electric Industrial Co., Ltd. Upright vacuum cleaner
JPH11155771A (ja) * 1997-11-27 1999-06-15 Toshiba Tec Corp 電気掃除機
WO2000076289A2 (fr) * 1999-06-15 2000-12-21 Arbortech Industries Ltd. Planche a flux d'air

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; Class Q41, AN 1986-244268/37 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007068922A3 (fr) * 2005-12-13 2007-11-01 Scotcan Ltd Appareil aspirateur ameliore
US10464668B2 (en) 2015-09-02 2019-11-05 Jetoptera, Inc. Configuration for vertical take-off and landing system for aerial vehicles
US10875658B2 (en) 2015-09-02 2020-12-29 Jetoptera, Inc. Ejector and airfoil configurations
RU169250U1 (ru) * 2016-03-31 2017-03-13 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный горный университет" (ФГБОУ ВО "УГГУ") Транспортное средство для пылеулавливания
RU169496U1 (ru) * 2016-05-16 2017-03-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный горный университет" (ФГБОУ ВО "УГГУ") Транспортное средство для пылеулавливания
US11001378B2 (en) 2016-08-08 2021-05-11 Jetoptera, Inc. Configuration for vertical take-off and landing system for aerial vehicles
US11148801B2 (en) 2017-06-27 2021-10-19 Jetoptera, Inc. Configuration for vertical take-off and landing system for aerial vehicles
WO2025082746A3 (fr) * 2023-10-16 2025-05-30 Bucher Municipal Limited Améliorations apportées à des ensembles d'aspiration arrière de véhicule de nettoyage routier

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