WO2000064250A1 - Dispositif de desherbage thermique a hotte - Google Patents
Dispositif de desherbage thermique a hotte Download PDFInfo
- Publication number
- WO2000064250A1 WO2000064250A1 PCT/FR2000/001053 FR0001053W WO0064250A1 WO 2000064250 A1 WO2000064250 A1 WO 2000064250A1 FR 0001053 W FR0001053 W FR 0001053W WO 0064250 A1 WO0064250 A1 WO 0064250A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hood
- box
- burner
- gases
- gas
- Prior art date
Links
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
- A01M21/00—Apparatus for the destruction of unwanted vegetation, e.g. weeds
- A01M21/04—Apparatus for destruction by steam, chemicals, burning, or electricity
Definitions
- the present invention relates to thermal weed control devices, in which flames or hot gases (smoke) from combustion are used to create a thermal shock on the weeds or weeds which it is desired to destroy.
- This shock disrupts the channels and cells of plant matter and causes them to disappear.
- Consideration has been given to using a device of this kind for weeding vines and other cultivated plant materials for which the weeds compete with the plant materials and serve as a refuge for harmful insects, the soil having to be, in the case of vines. , clean in spring to prevent any evaporation generating frosts.
- the leaves of plant materials, and especially those of vines are also very sensitive to thermal shock and the simple use of burners creates very significant convection currents which heat the leaves with disastrous consequences.
- the wind expels the combustion gases on the intake of the burners, causing their extinction.
- the invention overcomes these drawbacks by a thermal weed control device, in which the heat of the combustion gases has little effect on the cultivated plant materials located above the weeds to be destroyed and in which the danger of the burner going out is less. .
- the burner is mounted in a wall of a hood, the other walls of which are gas-tight and into which a gas discharge pipe opens.
- the upper wall and the front wall which is the one which comes first on the weeds when the device is operated, are waterproof.
- the combustion gases cannot escape upwards and to the side and reach, for example, the vine leaves.
- the gases exit the hood only through the exhaust duct which allows them to be transported away from the vine leaves.
- a baffle which defines, for the gases coming from the burner, a path going from the burner to the exhaust duct passing along the bottom of the hood.
- the hot gases thus remain in contact as long as possible with the weeds to be destroyed and the current thus created prevents any backflow and thus prevents any extinction of the burner.
- the hood preferably includes, at least on its side walls and on its front wall, a flexible skirt substantially gas-tight, which ensures good sealing with the ground.
- the hood is usually towed by a motor vehicle and is preferably gas tight at least on its side walls and on its front wall.
- the hot gases are thus well maintained inside the hood, so that they remain as long as possible in contact with the weeds to be destroyed.
- a box with an open bottom is disposed in front of the hood in the direction of movement of the vehicle and the exhaust duct opens into this box.
- This box serves as a preheating device.
- the gases which have already cooled in the hood still arrive relatively hot in the box and preheat the weeds, which facilitates their subsequent heating when the hood passes through.
- the box can also be constituted by a simple partition of the hood, but, preferably, the hood and the box are separate and are each provided with a transverse retraction mechanism, the exhaust duct being flexible. When the box encounters a plant, it retracts transversely until it passes behind the plant to return to its position in line with the plants and heat the weeds there.
- hood and the box have their own retracting mechanism, they only retract for a short time, respectively, when one retracts, the other remains in place on the line of plants, so that the device ensures maximum heating time on the plants to be destroyed
- the hood and / or the box prefferably, at least one of the walls m of the box is less gas tight than the side and front walls of the hood.
- the gases do not thus exit outside the hood, but all pass through the exhaust duct in the box where they can escape laterally so that, on the one hand, it is less hot gases which s escape from the box because they have exchanged heat with the weeds, and, on the other hand, they are directed so that they do not tend to reach the leaves of the plants which are above the upper wall of the box.
- a device giving speed to the gas is mounted in front of the hood.
- this device can be mounted in the duct putting the hood in communication with the box or in a pipe for evacuating the box leaving it or, if necessary, also at the same time. in the duct connecting the hood and the box and in the box exhaust duct.
- the increased kinetic energy of the gases allows them to better penetrate the grass.
- This slight depression ensures a sufficient supply of air to the burner, for example by opening the wall on which the burners are mounted, without sucking too much fresh air, which would lower the temperature of the gases sent to the box.
- the weed control device comprises two pairs, each having a hood and a box, arranged on either side of the longitudinal axis of the vehicle, the hoods being substantially adjacent to each other and the boxes substantially adjacent to each other, we can indeed weed , in a single pass, not only the parts of the soil next to the row of plants, but also the intervals between plants.
- FIG. 1 is a schematic perspective view of a weeding device comprising two pairs according to the invention
- FIG. 2 is a diagram of a device according to the invention in sectional view along line AA of FIG. 3
- FIG. 3 is a diagram corresponding to FIG.
- Figure 4 is a diagram of a variant in sectional view, and Figures 5 and 6 illustrate two other variants
- the thermal weeding device shown in Figure 1 essentially comprises a straddle motor vehicle symbolized by four wheels 1, a steering wheel 2 , a motor device 3 and a chassis 4 From the chassis goes down two legs 5 tool holders On each leg 5 tool holders is mounted a beam 6 which, by means of a retraction mechanism with or without device assistance 7 and 8, maintains, a hood 9 by the mechanism 7 and a box 10 by the mechanism 8, in the working position
- the hood 9 communicates with the box 10 (see FIG.
- the device comprises two hoods 9 symmetrical with respect to the longitudinal axis of the vehicle, which is also parallel to the direction of movement of the vehicle, and two boxes 10 symmetrical with respect to the longitudinal axis of the vehicle
- Each hood or box is provided in front of a deflection probe 13 which means that, when the probe comes into contact with a plant P, it has caused the box 10 or the hood 9 to be pushed transversely towards the outside the vehicle by mechanisms 7 or 8.
- Each hood 9 has a substantially parallelepiped shape by being open downwards.
- the walls of the hood are heat-insulated
- the upper wall 13 is gas tight except for the duct 11 which leads to the casing 10.
- the walls of the hood are gas tight.
- the bottom of the hood consists of a gas-tight skirt 14, but flexible so as to be able to accommodate irregularities in the terrain over which the hood is intended to pass.
- This skirt can consist of a row of chains, panels, fabric, scales, etc.
- hood 9 In the hood 9 are mounted, on the outer side wall, burners 15 supplied with combustible gas.
- a horizontal baffle 16 comes from the side wall where the burners 15 are mounted, but does not extend to the opposite side wall. It causes the hot gases from the burners 15 not to exit directly through the exhaust duct 11, but first pass along the bottom of the hood, as symbolized by the arrows F, before exiting through the duct 11 d 'evacuation.
- the device giving speed to the gases is constituted by a venturi 19 upstream of which an injector 20 of compressed air is provided, while in FIG. 6, this same device consists of an ejector 21 at coanda effect with supply via a compressed air line 22.
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)
- Catching Or Destruction (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00922706A EP1178724A1 (fr) | 1999-04-22 | 2000-04-21 | Dispositif de desherbage thermique a hotte |
AU43014/00A AU4301400A (en) | 1999-04-22 | 2000-04-22 | Thermal weed control device with hood |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9905095A FR2792499B1 (fr) | 1999-04-22 | 1999-04-22 | Dispositif de desherbage thermique a hotte |
FR99/05095 | 1999-04-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000064250A1 true WO2000064250A1 (fr) | 2000-11-02 |
Family
ID=9544737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/001053 WO2000064250A1 (fr) | 1999-04-22 | 2000-04-21 | Dispositif de desherbage thermique a hotte |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1178724A1 (fr) |
AU (1) | AU4301400A (fr) |
FR (1) | FR2792499B1 (fr) |
WO (1) | WO2000064250A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2841633B1 (fr) | 2002-06-27 | 2005-01-28 | Gerard Jaulent | Dispositif a combustion du type bruleur a gaz et son procede de travail |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3922002A1 (de) * | 1989-07-04 | 1991-01-17 | Technologie Im Strassenunterha | Verfahren und vorrichtung zur vernichtung von unkraeutern |
EP0437892A1 (fr) * | 1990-01-15 | 1991-07-24 | Hoaf Apparatenfabriek B.V. | Dispositif pour tuer thermiquement des mauvaises herbes |
WO1997003557A1 (fr) * | 1995-07-18 | 1997-02-06 | Waipuna International Limited | Appareil de desherbage a air chaud |
-
1999
- 1999-04-22 FR FR9905095A patent/FR2792499B1/fr not_active Expired - Fee Related
-
2000
- 2000-04-21 EP EP00922706A patent/EP1178724A1/fr not_active Withdrawn
- 2000-04-21 WO PCT/FR2000/001053 patent/WO2000064250A1/fr not_active Application Discontinuation
- 2000-04-22 AU AU43014/00A patent/AU4301400A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3922002A1 (de) * | 1989-07-04 | 1991-01-17 | Technologie Im Strassenunterha | Verfahren und vorrichtung zur vernichtung von unkraeutern |
EP0437892A1 (fr) * | 1990-01-15 | 1991-07-24 | Hoaf Apparatenfabriek B.V. | Dispositif pour tuer thermiquement des mauvaises herbes |
WO1997003557A1 (fr) * | 1995-07-18 | 1997-02-06 | Waipuna International Limited | Appareil de desherbage a air chaud |
Also Published As
Publication number | Publication date |
---|---|
AU4301400A (en) | 2000-11-10 |
EP1178724A1 (fr) | 2002-02-13 |
FR2792499A1 (fr) | 2000-10-27 |
FR2792499B1 (fr) | 2001-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0630462B1 (fr) | Appareil de combustion utilisant des combustibles solides ou solides/liquides | |
EP1479287A1 (fr) | Dispositif de sterilisation des sols | |
EP1178724A1 (fr) | Dispositif de desherbage thermique a hotte | |
JP4639119B2 (ja) | 除草装置 | |
CA2038990A1 (fr) | Cheminee du type a foyer ferme et a combustion apparente | |
EP1178725A1 (fr) | Dispositif de desherbage thermique a dispositif donnant de la vitesse aux gaz de combustion | |
CA1257161A (fr) | Foyer ferme pour cheminees a feu ouvert | |
FR3068203B1 (fr) | Dispositif de flammage du sol | |
EP0323502B1 (fr) | Dispositif formant bruleur a gaz, notamment pour appareil de chauffage. | |
EP2898767B1 (fr) | Machine pour la production et la diffusion d'air chaud dans les cultures en plein champ | |
FR2823644A1 (fr) | Procede de desherbage thermique de vegetaux au sol et dispositif pour sa mise en oeuvre | |
FR2461893A1 (fr) | Generateur d'eau chaude, notamment chaudiere de chauffage central | |
EP0952399A1 (fr) | Dispositif de cheminée à insert à gaz | |
FR2726073A1 (fr) | Dispositif et procede de distribution d'air de combustion dans des installations de chauffage, notamment a combustibles solides | |
FR2458751A1 (fr) | Four incinerateur pour ordures | |
EP0064968A2 (fr) | Appareil de chauffage à feu nu avec échangeur de chaleur | |
BE1022948B1 (fr) | Appareil de chauffage muni de mini-bruleurs | |
FR2686398A1 (fr) | Dispositif d'alimentation continue pour chaudiere a combustible vegetal. | |
WO2002019817A1 (fr) | Dispositif de desherbage thermique | |
FR2871026A1 (fr) | Dispositif de defanage thermique de plantes | |
FR2949843A1 (fr) | Corps de chauffe a plusieurs entrees d'air de combustion et a organe de commande unique | |
FR2583503A1 (fr) | Chaudiere a combustion inversee ou horizontale | |
EP1129619A1 (fr) | Désherbeur thermique attelable à un véhicule | |
FR2708339A1 (fr) | Foyer fermé pour cheminée. | |
FR2778530A1 (fr) | Machine de traitement thermique de sols |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AU BA BB BG BR CA CN CR CU CZ DM EE GD GE HR HU ID IL IN IS JP KP KR LC LK LR LT LV MA MG MK MN MX NO NZ PL RO SG SI SK TR TT UA US UZ VN YU ZA |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2000922706 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2000922706 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2000922706 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |