DK173373B1

DK173373B1 - Apparatus for removal of weeds by means of steam

Info

Publication number: DK173373B1
Application number: DK898A
Authority: DK
Inventors: Ltd V Gert Hansen Chimex; Finn Lundorf Petersen
Original assignee: Ltd V Gert Hansen Chimex; Finn Lundorf Petersen
Priority date: 1998-01-07
Filing date: 1998-01-07
Publication date: 2000-09-11
Also published as: DK898A

Description

DK 173373 B1DK 173373 B1

Opfindelsen angår et apparat til ukrudtsf]emel se ved hjælp af damp og omfattende midler til generering af hed vanddamp, der ved hjælp af damptrykket kan udledes gennem et rør til toppen af et mundstykke, der indeholder dampdyser, hvor mundstykket langs en kant til anlæg mod jorden er forsynet med et skørt til tætning mellem kanten ogjorden og omkring dyserne.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an apparatus for weeding through vapor and comprising means for generating hot water vapor which can be discharged by means of vapor pressure through a tube to the top of a nozzle containing vapor nozzles, the nozzle along an edge for abutment. the ground is provided with a skirt to seal between the edge and the ground and around the nozzles.

55

Et sådant apparat er kendt fra WO 98/32332, hvor røret inde mundstykket forgrenes til et antal rør med mindre diameter, og hvis åbne ender udgør dampdyser tæt ved mundstykkets side til anlæg mod jorden. Ved at føre mundstykket hen overjorden samtidig rned at der udledes hed vanddamp kan ukrudtsplanter opvarmes så meget, at de dør. Den hede damp rammer planten og på grund af damptrykket og på grund 10 af at mundstykket slutter relativ tæt til jordoverfladen, presses den hede vanddamp både ind i planternes blade og ned underjordoverfladen, samt ned til planterøddeme. Det kendte apparat har imidlertid den ulempe, at den direkte tilslutning af grenrør til tilførselsrøret for damp medfører en uens fordeling af damp i rørene. Således vil grenrør, der befinder sig nærmest i forlængelse af tilførselsrøret, få mest damp, mens grenrør, der er siderettede i forhold dertil, få mindre damp. Det betyder en ujævn påvirkning 15 af ukrudtet under mundstykket, eller et unødvendigt stort dampforbrug.Such an apparatus is known from WO 98/32332, in which the pipe inside the nozzle is branched into a number of smaller diameter pipes, the open ends of which form steam nozzles close to the nozzle side for abutment to the ground. By moving the nozzle above the ground at the same time that water vapor is emitted, weeds can be heated so much that they die. The hot steam hits the plant and because of the vapor pressure and due to the nozzle closing relatively close to the soil surface, the hot water vapor is pressed both into the leaves of the plants and down to the soil surface, as well as down to the plant roots. However, the known apparatus has the disadvantage that the direct connection of manifolds to the steam supply pipe causes an uneven distribution of steam in the pipes. Thus, branch pipes closest to the supply pipe will get the most steam, while branch pipes that are lateral to them will have less steam. This means an uneven impact on the weeds under the nozzle, or an unnecessarily large steam consumption.

Ved opfindelsen tilvejebringes et apparat af det indledningsvis nævnte art, hvor det særlige er, at mundstykket ved sin mod jorden vendende side har en plade, der afgrænser et hulrum inde i mundstykket, at røret udmunder i hulrummet, og at pladen er forsynet med dampdyseme, 20The invention provides an apparatus of the kind mentioned in the preamble, wherein it is special that the nozzle has on its ground-facing side a plate defining a cavity inside the nozzle, that the tube opens into the cavity and that the plate is provided with the steam nozzles. 20

Derved skabes et trykrum for dampen mundstykket. Da trykket vil være ens overalt i dette rum, vil dampen tilføres alle dyser med samme tryk uanset dysemes fysiske placering i pladen. Resultatet er, at der opnås et mere ensartet damppåvirkning af underlaget og dermed af det behandlede ukrudt. Samtidig kan der spares damp og dermed energi i forhold til den kendte teknik.This creates a pressure chamber for the steam nozzle. Since the pressure will be the same throughout this space, the steam will be supplied to all nozzles at the same pressure regardless of the physical location of the nozzles in the plate. The result is that a more uniform vapor effect is obtained on the substrate and thus on the treated weeds. At the same time steam and thus energy can be saved compared to the prior art.

2525

Som angivet i krav 2 foretrækkes, at skørtet består af tætte børster og strækker sig vinkelret væk fra pladen. Børsterne giver tilstrækkelig tæthed langs mundstykkets sider samtidig med, at børstehåren let kan give efter for ujævnheder på jordoverfladen.As stated in claim 2, it is preferred that the skirt consists of dense brushes and extend perpendicularly away from the plate. The brushes provide sufficient tightness along the sides of the mouthpiece, while allowing the bristles to easily give way to uneven grounding.

30 Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor:The invention is explained in more detail below with reference to the drawings, in which:

Fig. I viser dampgenerator med påfyldningsstuds & overtryksventil, afbryder, magnetventil,, termostat, strømkontakter og varmelegeme.FIG. You show the steam generator with filling plug & overpressure valve, circuit breaker, solenoid valve, thermostat, power contacts and heater.

DK 173373 B1DK 173373 B1

Fig. 2 viser det bøjelige isolerede plastrør, som fører ned til mundstykket.FIG. 2 shows the flexible insulated plastic pipe leading down to the nozzle.

Fig.3&4 viser mundstykket med dampdyser og tætte stive børster langs kanten.Figs. 3 & 4 show the nozzle with steam nozzles and dense stiff brushes along the edge.

55

Apparatet består af 2 hoveddele: (A) dampgenerator samt (B) mundstykke med dampdyser og isoleret slange til generator.The apparatus consists of 2 main parts: (A) steam generator and (B) nozzle with steam nozzles and insulated hose for generator.

Vedr. (A) - Fig. 1: En tryktank (1) med (2) indbygget elektrisk varmelegeme indeholdende (3) 10 elektriske kontakter, samt (4) vandpåfyldningstuds med overtryksventil, (5) elektrisk afbryder, (6) termostat og (7) dampudtag med magnetventil.relating to. (A) - FIG. 1: A pressure tank (1) with (2) built-in electric heater containing (3) 10 electrical contacts, and (4) water filling nozzle with pressure valve, (5) electric switch, (6) thermostat and (7) steam outlet with solenoid valve.

Vedr. (B) - Fig 2-4: (8) Isoleret og bøjelig dampslange med håndtag, (9) mundstykke bestående af en (10) overplade, samt en plade (10') med et antal (11) dampdyser. Overpladen (10) og pladen (10') 15 afgrænses af et rum (R) i mundstykket. Langs overpladens kant hele vejen rundt er monteret et skørt (12) af stive, tætte børstehår.relating to. (B) - Fig 2-4: (8) Insulated and flexible steam hose with handle, (9) nozzle consisting of one (10) top plate, and a plate (10 ') with a plurality of (11) steam nozzles. The top plate (10) and the plate (10 ') 15 are defined by a space (R) in the mouthpiece. A skirt (12) of rigid, dense bristles is mounted along the edge of the top plate all around.

Virkemåde: 20 Almindeligt postevand hældes via påfyldningstudsen (4) ned i (1) tryktanken, hvorefter påfyldningstudsen lukkes. Herefter tilsluttes elektrisk strøm til (2) varmelegemet via (3) de elektriske kontakter.Procedure: 20 Plain tap water is poured into the pressure tank via the filling nozzle (4), after which the filling nozzle is closed. Next, electrical power is connected to (2) the heater via (3) the electrical contacts.

Efter kogning af vandet sørger (6) termostaten for at afbryde strømtilførslen når rette temperatur er 25 opnået og efterfølgende at anslutte strømtilførslen når temperaturen atter skal øges. ved kogning af vandet opbygges et tryk, som hvis et givent tryk overstiges, udlignes via (4) overtryksventilen.After boiling the water (6), the thermostat will disconnect the power supply when the right temperature is reached and subsequently connect the power supply when the temperature is to be increased again. when boiling the water, a pressure is built up which, if a given pressure is exceeded, is offset via (4) the pressure valve.

Dampen udtages via (7) dampudtaget med magnetventil som aktiveres, hvorved dampen ledes over i (8) den isolerede og bøjelige dampslange med håndtag, som munder ud i (9) mundstykket. Dette består af 30 en (10) overplade, hvor dampen fordeles til et antal (11) dampdyser hvorfra den hede damp udledes under overpladen. Langs overpladens ydre kant hele vejen rundt er monteret (12) et skørt bestående af stive, tætte børstehår som anslutter jordoverfladen vinkelret og forhindrer dampen i at trænge ud og medvirker til at opretholde et overtryk, således at dampen presses ind i planten og ned i jordoverfladenThe steam is taken out via (7) the steam outlet with solenoid valve which is activated, whereby the steam is fed into (8) the insulated and flexible steam hose with handles which open into the (9) nozzle. This consists of a (10) top plate, the steam being distributed to a number of (11) steam nozzles from which the hot steam is discharged below the top plate. Along the outer edge of the top plate all around (12) is mounted a skirt consisting of rigid, dense bristles which connect the soil surface perpendicularly and prevent the steam from penetrating and help maintain an overpressure, so that the steam is pressed into the plant and down into the soil surface.

Claims

3. DK 173373 B1

An apparatus for weed removal by vapor and comprising means for generating hot water vapor which can be discharged by means of the vapor pressure through a pipe (8) to the top of a nozzle (B) containing vapor nozzles (11), the nozzle along a The abutment abutment is provided with a skirt (12) for sealing between the abutment and the ground and around the nozzles, characterized in that the nozzle at its side facing the ground has a plate (10 ') defining a cavity (R). inside the nozzle, the tube opens into the cavity and the plate (10 ') has a plurality of steam nozzles (11).

Apparatus according to claim 1, characterized in that the skirt (12) consists of dense brushes and extends perpendicularly away from the plate (10 '). 15