EP0368129B1 - Suction dredger - Google Patents

Suction dredger Download PDF

Info

Publication number
EP0368129B1
EP0368129B1 EP89120239A EP89120239A EP0368129B1 EP 0368129 B1 EP0368129 B1 EP 0368129B1 EP 89120239 A EP89120239 A EP 89120239A EP 89120239 A EP89120239 A EP 89120239A EP 0368129 B1 EP0368129 B1 EP 0368129B1
Authority
EP
European Patent Office
Prior art keywords
filter
collecting container
suction
suction nozzle
nozzles
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
EP89120239A
Other languages
German (de)
French (fr)
Other versions
EP0368129A1 (en
Inventor
Karl Dipl.-Ing. Rinker (Fh)
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.)
Cessione reschwitzer Saugbagger Produktions GmbH
Original Assignee
Vmb Vesta Maschinenbau & Co KG GmbH
Vmb Vesta Maschinenbau & Co KG GmbH
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 Vmb Vesta Maschinenbau & Co KG GmbH, Vmb Vesta Maschinenbau & Co KG GmbH filed Critical Vmb Vesta Maschinenbau & Co KG GmbH
Publication of EP0368129A1 publication Critical patent/EP0368129A1/en
Application granted granted Critical
Publication of EP0368129B1 publication Critical patent/EP0368129B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/8816—Mobile land installations
    • E02F3/8825—Mobile land installations wherein at least a part of the soil-shifting equipment is mounted on a dipper-arm, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9256—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head
    • E02F3/9268—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements
    • E02F3/9275—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements with axis of rotation parallel to longitudinal axis of the suction pipe
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/94—Apparatus for separating stones from the dredged material, i.e. separating or treating dredged material
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/003—Dredgers or soil-shifting machines for special purposes for uncovering conduits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
    • E02F5/287—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with jet nozzles

Definitions

  • the invention relates to a suction excavator according to the preamble of claim 1.
  • Such an excavator for targeted excavation of soil has a suction nozzle that carries at one end a hollow cylindrical tool that forms a suction piece of the suction nozzle.
  • the suction nozzle is connected at its other end to a collecting container or a cyclone sitting on it.
  • a suction fan is also connected to the collecting container, by means of which the soil can be conveyed through the suction nozzle into the collecting container.
  • a filter is arranged to prevent dust from entering the suction fan.
  • the invention has for its object to provide an excavator of the type mentioned, in which a high suction power is guaranteed with reliable filtering of the particles carried in the air stream.
  • the suction nozzle to the collecting container are arranged within the same water nozzles and directed into the flow.
  • the water injected into the conveying stream can bind the dust portion of the material entering the collecting container. In this way, the dust can be largely separated immediately after entering the collection container. As a result, the amount of particles still hitting the filter is significantly reduced, so that it can be kept free in a simple manner.
  • a separation of the material carried in the air flow is also achieved in that an apron which deflects the flow of flow downward is arranged inside the collecting container before the connection of the suction nozzle as a separator and leads to gravity separation, in particular of the heavy material particles, so that these do not up to can get to the filter.
  • air nozzles and / or water nozzles are arranged in the air flow on the suction side of the collecting container and directed onto the filter.
  • the filter can be pressurized with water and / or compressed air while the excavator is in operation and can be cleaned continuously. In this way, clogging or clogging of the filter is avoided, so that the suction power can be kept essentially constant.
  • the filter can be cleaned either continuously or at certain intervals.
  • the filter can also be cleaned after or during the emptying of the collecting container, so that the excavator can be used again quickly without dead times.
  • the filter on the suction side is a surface filter. If the nozzles are arranged on the downstream side of the filter, a high cleaning performance can be achieved, since the nozzles emit an air and / or water stream which, for example, spreads out like a veil and is directed against the suction air flow. In this way, the particles adhering to the filter can be flushed out in countercurrent in a simple manner.
  • the nozzles are protected by the filter from the particles entrained in the delivery flow of the suction fan.
  • the excavator shown in FIG. 1 has a chassis 1 on which a collecting container 2 with a suction nozzle 3 connected at the rear and a suction fan 4 are arranged.
  • the suction fan 4 is connected via a line 5 with a built-in silencer 6 in the upper area of the collecting container.
  • a silencer 8 is also arranged in the exhaust air line 7 of the blower 4.
  • the suction nozzle 3 opens into the collecting container via a collar 18.
  • the proboscis 3 consists of a flexible, stiffened material and is guided downwards via a hose reel. At its lower end, the proboscis 3 has an opening tool, generally designated 10, which is surrounded by a protective basket 11.
  • the hose reel 9 is freely rotatably supported at the free end of a boom 12.
  • the boom 12 can be raised and lowered on a column 15 by means of a lifting cylinder 13 about a horizontal transverse axis 14.
  • the column 15 in turn can be rotated about a vertical axis by means of a swivel motor 16, so that the suction nozzle can be moved into the positions shown in broken lines in FIGS. 2 and 3.
  • the breaking tool has an annular toothing 17, the details of which will be described later.
  • the breaking tool designated as a whole with 10, as well as the toothing 17 are hollow cylindrical, so that the soil loosened from the toothing is sucked in by means of the vacuum generated in the collecting container 2 and in the suction nozzle 3 and transported into the collecting container.
  • an apron 19 Arranged inside the collecting container 2 immediately behind the mouth of the suction nozzle 3 is an apron 19 which acts as a separator and which deflects the transport air and the material transported by it downward.
  • the apron 19 can have rubber-elastic tabs 20 at least in the lower region.
  • one or more water nozzles 21 are arranged in order to bind and separate at least a large part of the carried dust.
  • the transport air passes through a surface filter 22 into the suction line 5.
  • a device for cleaning the filter which has a plurality of air nozzles 23 directed against the filter and on the one hand binds further dust and on the other hand cleans the surface filter.
  • the filter can have a grid-like structure, in particular consist of a metal grid 24. Above the metal grid 24, a plurality of nozzle tubes 25, which have the air nozzles 23, are arranged in parallel. The nozzle tubes 25 can be controlled intermittently or continuously, so that the surface filter 22 is cleaned discontinuously or continuously.
  • the collection container 2 is arranged on the chassis 1 so that it can be emptied by a tilting movement. For this purpose, it can optionally be divided so that only the lower part of the container has to be tilted. Provision can also be made to ensure that the connection units, such as the proboscis, suction line, etc., remain stationary.
  • the collecting container 2 can either be tilted backwards about a horizontal transverse axis 27 (FIG. 1) or else about horizontal longitudinal axes 28 on one or the other side of the chassis 1 (see FIG. 4).
  • FIG. 7 shows the suction nozzle 3 in the region of the hollow cylindrical breaking tool 10.
  • annular supply air nozzles 29 which extend from bottom to top in the direction of transport and narrow in this direction. Through these nozzles 29 air is sucked in from the side, which enters the breaker tool 10 in an injector-like manner and supports the conveying of the material, in particular prevents the feed stream from being loaded too heavily and thereby avoids clogging of the suction nozzle or suspension of the conveyance.
  • the teeth of the toothing 17 are pivoted or adjusted relative to the axis of the breaking tool in such a way that when the breaking tool is turned, the material loosened by the teeth 30 is conveyed inwards.
  • the loosening of the soil can also be supported by high-pressure nozzles 31, which are supplied with compressed air or pressurized water.
  • the suction nozzle 3 is designed at its lower end so that break-open tools 32 with different, in particular smaller, diameters can also be used, as shown in FIG. This makes it possible to penetrate gaps between installed cables.
  • the toothing 17 is preferably arranged on a separate ring 33 which is guided or mounted within the hollow cylindrical breaking tool 10 and which can be set into torsional vibrations by means of a compressed air motor 34 or the like.
  • the compressed air motor 34 has a cam 35 on its drive which engages in a corresponding recess in a shoulder 36 on the ring 33.
  • FIG. 11 shows an embodiment in which a transverse worm mill 37 is mounted within the breaking tool 10, which in turn is preferably driven by a compressed air motor 38.
  • the snails are so designed that they transport the soil loosened by them to the center, for example a worm gear 38, 39 are provided, which loosen and promote the soil from the outside inwards.
  • FIG. 12 shows an additional device in the form of a compressed air lance 40, which is connected to a compressed air source via a line 41 and has a plurality of nozzles 42 at the end, in the exemplary embodiment shown, three.
  • a compressed air lance 40 By means of the compressed air lance 40, material adhering or resting on the pipelines can be blown off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Combined Means For Separation Of Solids (AREA)

Description

Die Erfindung betrifft einen Saugbagger gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a suction excavator according to the preamble of claim 1.

Ein derartiger Bagger zum gezielten Ausheben von Erdreich, wie er in der FR-A-2584435 gezeigt ist, weist einen Saugrüssel auf, der an seinem einen Ende ein hohlzylindrisches Werkzeug trägt, das ein Ansaugstück des Saugrüssels bildet. Der Saugrüssel ist an seinem anderen Ende an einen Sammelbehälter bzw. einen auf diesem sitzenden Zyklon angeschlossen. An den Sammelbehälter ist des weiteren ein Sauggebläse angeschlossen, mittels dessen das Erdreich durch den Saugrüssel in den Sammelbehälter gefördert werden kann. Vor dem Anschluß der Saugleitung an den Zyklon und in der Saugleitung vor dem Sauggebläse ist jeweis ein Filter angeordnet, die das Eindringen von Staub in das Sauggebläse verhindern sollen. Es hat sich jedoch gezeigt, daß sich das Filter bei Betrieb durch die in dem Luftstrom mitgeführten Feststoffpartikel relativ schnell zusetzt, wodurch die Saugleistung des Baggers schneller absinkt. In Erkenntnis dieses Nachteils sind bei dem Bagger gemäß der FR-A-2584435 zwei Filter hintereinander geschaltet, was jedoch nur einen Sinn macht, wenn die Filter abgestufte Maschenweiten aufweisen. Das grundsätzliche Problem ist damit nicht zu beheben.Such an excavator for targeted excavation of soil, as shown in FR-A-2584435, has a suction nozzle that carries at one end a hollow cylindrical tool that forms a suction piece of the suction nozzle. The suction nozzle is connected at its other end to a collecting container or a cyclone sitting on it. A suction fan is also connected to the collecting container, by means of which the soil can be conveyed through the suction nozzle into the collecting container. Before the suction line is connected to the cyclone and in the suction line in front of the suction fan, a filter is arranged to prevent dust from entering the suction fan. However, it has been shown that the filter clogs up relatively quickly during operation due to the solid particles carried in the air stream, as a result of which the suction power of the excavator drops more rapidly. Recognizing this disadvantage, two filters are connected in series in the excavator according to FR-A-2584435, which only makes sense if the filters have graduated mesh sizes. The fundamental problem cannot be solved with this.

Ein gleichartiger Bagger ist auch aus der US-A-3930324 zu entnehmen mit dem erheblich größeren Nachteil, daß das Filter dem Sauggebläse druckseitig nachgeschaltet ist, so daß sämtliche Partikel, die nicht im Sammelbehälter durch Schwerkraft abgeschieden werden, durch das Sauggebläse hindurch gefördert werden.A similar excavator can also be found in US-A-3930324 with the considerably greater disadvantage that the filter is connected downstream of the suction fan, so that all particles that are not separated by gravity in the collecting container are conveyed through the suction fan.

Aus der GB-A-2095126 ist es bekannt, einen Filter mit Hilfe eines Wasserstrahls aus einer stromabgelegenen Düsenanordnung zu reinigen. Eine derartige Anordnung eignet sich jedoch lediglich für relativ feines, vom Filter zu lösendes Material, beispielsweise Staub, weshalb die Anordnung gemäß der GB-A-2095126 auch vorzugsweise bei Klimaanlagen oder ähnlichem verwendet werden soll. Eine ähnliche Vorrichtung ist aus der US-A-2513174 zu entnehmen, gemäß der gegenüber einem flächigen Gas-Filter mehrere Düsen angeordnet sind, mittels derer das Filtermaterial mit Wasser bespritzt werden kann, um das Filter von aus dem Gasstrom zurückgehaltenen Teilchen zu reinigen. Bei einem Saugbagger können jedoch auch lehmhaltige Erdbrocken oder ähnliches auf das Filter gelangen, die mit einem Wasserstrahl von dem Filter nur sehr schwer zu lösen sind.From GB-A-2095126 it is known to clean a filter using a water jet from a downstream nozzle arrangement. However, such an arrangement is only suitable for relatively fine material to be removed from the filter, for example dust, which is why the arrangement according to GB-A-2095126 should also preferably be used in air conditioning systems or the like. A similar device can be found in US-A-2513174, according to which a number of nozzles are arranged opposite a flat gas filter, by means of which the filter material can be sprayed with water in order to clean the filter of particles retained from the gas stream. In the case of a suction dredger, however, earthy chunks of earth or the like can also get onto the filter, which are very difficult to remove from the filter with a water jet.

Der Erfindung liegt die Aufgabe zugrunde, einen Bagger der eingangs genannten Art zu schaffen, bei dem bei zuverlässiger Ausfilterung der im Luftstrom mitgeführten Teilchen eine hohe Saugleistung gewährleistet ist.The invention has for its object to provide an excavator of the type mentioned, in which a high suction power is guaranteed with reliable filtering of the particles carried in the air stream.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is achieved by the features in the characterizing part of patent claim 1.

Erfindungsgemäß ist vorgesehen, daß im Bereich des Anschlusses des Saugrüssels am Sammelbehälter innerhalb desselben Wasserdüsen angeordnet und in den Förderstrom gerichtet sind. Durch das in den Förderstrom eingedüste Wasser kann eine Bindung des Staubanteils des in dem Sammelbehälter eintretende Materials erreicht werden. Auf diese Weise kann der Staub unmittelbar nach dem Eintritt in den Sammelbehälter weitgehend abgeschieden werden. Dadurch ist die Teilchenmenge, die noch auf das Filter trifft, wesentlich verringert, so daß dieses in einfacher Weise frei gehalten werden kann.According to the invention it is provided that in the area of the connection of the suction nozzle to the collecting container are arranged within the same water nozzles and directed into the flow. The water injected into the conveying stream can bind the dust portion of the material entering the collecting container. In this way, the dust can be largely separated immediately after entering the collection container. As a result, the amount of particles still hitting the filter is significantly reduced, so that it can be kept free in a simple manner.

Zusätzlich wird ein Abscheiden des im Luftstrom mitgeführten Gutes auch dadurch erreicht, daß innerhalb des Sammelbehälters vor dem Anschluß des Saugrüssels als Abscheider eine den Förderstrom nach unten ablenkende Schürze angeordnet ist, die zu einer Schwerkraftabscheidung, insbesondere der schweren Materialteilchen führt, so daß diese nicht bis zum Filter vordringen können.In addition, a separation of the material carried in the air flow is also achieved in that an apron which deflects the flow of flow downward is arranged inside the collecting container before the connection of the suction nozzle as a separator and leads to gravity separation, in particular of the heavy material particles, so that these do not up to can get to the filter.

Im Bereich des oder der Filter sind an der Absaugseite des Sammelbehälters Luftdüsen und/oder Wasserdüsen in dem Luftstrom angeordnet und auf das Filter gerichtet. Somit kann das Filter auch während des Betriebs des Baggers mit Wasser und/oder Pressluft beaufschlagt und ständig gereinigt werden. Auf diese Weise wird ein Zusetzen oder Verstopfen des Filters vermieden, so daß die Saugleistung im wesentlichen konstant gehalten werden kann. Das Reinigen des Filters kann dabei entweder kontinuierlich oder in bestimmten Intervallen erfolgen. Darüber hinaus kann das Filter auch nach oder während des Entleerens des Sammelbehälters gereinigt werden, so daß der Bagger ohne Totzeiten schnell wieder einsetzbar ist.In the area of the filter or filters, air nozzles and / or water nozzles are arranged in the air flow on the suction side of the collecting container and directed onto the filter. This means that the filter can be pressurized with water and / or compressed air while the excavator is in operation and can be cleaned continuously. In this way, clogging or clogging of the filter is avoided, so that the suction power can be kept essentially constant. The filter can be cleaned either continuously or at certain intervals. In addition, the filter can also be cleaned after or during the emptying of the collecting container, so that the excavator can be used again quickly without dead times.

In vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß das Filter an der Absaugseite ein Flächenfilter ist. Wenn die Düsen auf der Abströmseite des Filters angeordnet sind, kann eine hohe Reinigungsleistung erzielt werden, da die Düsen einen Luft- und/oder Wasserstrom, der sich beispielsweise schleierartig ausbreitet, abgeben, der entgegen der Saugluftströmung gerichtet ist. Auf diese Weise können die am Filter anhaftenden Teilchen in einfacher Weise im Gegenstrom herausgespühlt werden.In an advantageous embodiment of the invention it is provided that the filter on the suction side is a surface filter. If the nozzles are arranged on the downstream side of the filter, a high cleaning performance can be achieved, since the nozzles emit an air and / or water stream which, for example, spreads out like a veil and is directed against the suction air flow. In this way, the particles adhering to the filter can be flushed out in countercurrent in a simple manner.

Darüber hinaus sind bei einer derartigen Anordnung die Düsen vor den in dem Förderstrom des Sauggebläses mitgeführten Teilchen durch den Filter geschützt.In addition, in such an arrangement, the nozzles are protected by the filter from the particles entrained in the delivery flow of the suction fan.

In der Praxis hat es sich als vorteilhaft erwiesen, wenn mehrere Luftdüsen und/oder Wasserdüsen über dem Flächenfilter angeordnet und intermitierend und/oder nacheinander steuerbar sind, wodurch eine Art Schwallströmung erhalten wird.In practice, it has proven to be advantageous if a plurality of air nozzles and / or water nozzles are arranged above the surface filter and can be controlled intermittently and / or in succession, as a result of which a type of surge flow is obtained.

Nachstehend ist die Erfindung anhand von in der Zeichnung wiedergegebenen Ausführungsbeispielen beschrieben. In der Zeichnung zeigen:

Figur 1
einen schematischen Schnitt einer Ausführungsform des Baggers;
Figur 2
eine Seitenansicht im Bereich des Saugrüssels in einer gegenüber Figur 1 abgewandelten Ausführung;
Figur 3
eine Ansicht von oben im Bereich des Anschlusses des Saugrüssels;
Figur 4
eine Ansicht auf den Bagger von hinten;
Figur 5
eine Seitenansicht des Flächenfilters an der Absaugseite des Sammelbehälters;
Figur 6
eine Draufsicht zu der Darstellung gemäß Figur 5;
Figur 7
eine Detailansicht des Saugrüssels im Bereich des Aufbrechwerkzeugs;
Figur 8
eine Ansicht des Aufbrechwerkzeugs in axialer Richtung;
Figur 9
eine Ansicht einer Variante des Aufbrechwerkzeugs;
Figur 10
eine Ansicht einer weiteren Variante des Aufbrechwerkzeugs;
Figur 11
eine Ansicht einer dritten Ausführungsform des Aufbrechwerkzeugs und
Figur 12
eine Ansicht einer Preßluftlanze.
The invention is described below with reference to exemplary embodiments shown in the drawing. The drawing shows:
Figure 1
a schematic section of an embodiment of the excavator;
Figure 2
a side view in the area of the proboscis in a modified version compared to Figure 1;
Figure 3
a view from above in the area of the connection of the suction nozzle;
Figure 4
a view of the excavator from behind;
Figure 5
a side view of the surface filter on the suction side of the collection container;
Figure 6
a plan view of the representation of Figure 5;
Figure 7
a detailed view of the proboscis in the area of the breaking tool;
Figure 8
a view of the breaking tool in the axial direction;
Figure 9
a view of a variant of the breaking tool;
Figure 10
a view of another variant of the breaking tool;
Figure 11
a view of a third embodiment of the breaking tool and
Figure 12
a view of a compressed air lance.

Der in Figur 1 dargestellte Bagger weist ein Fahrgestell 1 auf, auf dem ein Sammelbehälter 2 mit heckseitig angeschlossenem Saugrüssel 3 und ein Sauggebläse 4 angeordnet sind. Das Sauggebläse 4 ist über eine Leitung 5 mit einem eingebauten Schalldämpfer 6 im oberen Bereich des Sammelbehälters angeschlossen. Ebenso ist in der Abluftleitung 7 des Gebläses 4 ein Schalldämpfer 8 angeordnet.The excavator shown in FIG. 1 has a chassis 1 on which a collecting container 2 with a suction nozzle 3 connected at the rear and a suction fan 4 are arranged. The suction fan 4 is connected via a line 5 with a built-in silencer 6 in the upper area of the collecting container. A silencer 8 is also arranged in the exhaust air line 7 of the blower 4.

An der dem Anschluß der Leitung 5 gegenüberliegenden, oberen Ende des Sammelbehälters 2 mündet der Saugrüssel 3 über einen Kragen 18 in den Sammelbehälter. Der Saugrüssel 3 besteht aus einem flexiblen, ausgesteiften Material und ist über eine Schlauchrolle nach unten geführt. An seinem unteren Ende weist der Saugrüssel 3 ein insgesamt mit 10 bezeichnetes Aufbrechwerkzeug auf, das von einem Schutzkorb 11 umgeben ist.At the upper end of the collecting container 2 opposite the connection of the line 5, the suction nozzle 3 opens into the collecting container via a collar 18. The proboscis 3 consists of a flexible, stiffened material and is guided downwards via a hose reel. At its lower end, the proboscis 3 has an opening tool, generally designated 10, which is surrounded by a protective basket 11.

Die Schlauchrolle 9 ist an dem freien Ende eines Auslegers 12 frei drehbar gelagert. Der Ausleger 12 ist mittels eines Hubzylinders 13 um eine horizontale Querachse 14 an einer Säule 15 heb- und senkbar. Die Säule 15 ihrerseits ist um eine vertikale Achse mittels eines Schwenkmotors 16 drehbar, so daß der Saugrüssel in die in Figuren 2 und 3 gestrichelt wiedergegebenen Positionen bewegt werden kann. Das Aufbrechwerkzeug weist bei dem in Figur 1 wiedergegebenen Ausführungsbeispiel als Arbeitswerkzeug eine ringförmige Verzahnung 17 auf, deren Details noch später beschrieben werden. Das insgesamt mit 10 bezeichnete Aufbrechwerkzeug, wie auch die Verzahnung 17 sind hohlzylindrisch ausgebildet, so daß das von der Verzahnung gelöste Erdreich mittels des über das Sauggebläse 4 im Sammelbehäter 2 und im Saugrüssel 3 erzeugten Unterdrucks angesaugt und in den Sammelbehälter transportiert wird. Innerhalb des Sammelbehälters 2 ist unmittelbar hinter der Einmündung des Saugrüssels 3 eine als Abscheider wirkende Schürze 19 angeordnet, die die Transportluft und das von ihr transportierte Material nach unten ablenkt. Zumindest im unteren Bereich kann die Schürze 19 gummielastische Lappen 20 aufweisen. Unmittelbar an der Einmündung des Saugrüssels 3 sind eine oder mehr Wasserdüsen 21 angeordnet, um zumindest einen großen Teil des mitgeführten Staubs zu binden und abzuscheiden.The hose reel 9 is freely rotatably supported at the free end of a boom 12. The boom 12 can be raised and lowered on a column 15 by means of a lifting cylinder 13 about a horizontal transverse axis 14. The column 15 in turn can be rotated about a vertical axis by means of a swivel motor 16, so that the suction nozzle can be moved into the positions shown in broken lines in FIGS. 2 and 3. In the embodiment shown in FIG. 1, the breaking tool has an annular toothing 17, the details of which will be described later. The breaking tool, designated as a whole with 10, as well as the toothing 17 are hollow cylindrical, so that the soil loosened from the toothing is sucked in by means of the vacuum generated in the collecting container 2 and in the suction nozzle 3 and transported into the collecting container. Arranged inside the collecting container 2 immediately behind the mouth of the suction nozzle 3 is an apron 19 which acts as a separator and which deflects the transport air and the material transported by it downward. The apron 19 can have rubber-elastic tabs 20 at least in the lower region. Immediately at the mouth of the suction nozzle 3, one or more water nozzles 21 are arranged in order to bind and separate at least a large part of the carried dust.

Nach dem Abscheider gelangt die Transportluft durch einen Flächenfilter 22 in die Absaugleitung 5. In Strömungsrichtung hinter dem Flächenfilter 22 ist eine Einrichtung zum Abreinigen des Filters angeordnet, die mehrere gegen das Filter gerichtete Luftdüsen 23 aufweist und einerseits weiteren Staub bindet, andererseits den Flächenfilter reinigt.After the separator, the transport air passes through a surface filter 22 into the suction line 5. In the flow direction behind the surface filter 22 there is a device for cleaning the filter, which has a plurality of air nozzles 23 directed against the filter and on the one hand binds further dust and on the other hand cleans the surface filter.

Eine Ausführungsform des Flächenfilters ist in den Figuren 5 und 6 vergroßert wiedergegeben. Der Filter kann gitterartige Struktur haben, insbesondere aus einem Metallgitter 24 bestehen. Oberhalb des Metallgitters 24 sind mehrere Düsenrohre 25, welche die Luftdüsen 23 aufweisen, parallel angeordnet. Die Düsenrohre 25 können intermittierend oder kontinuierlich angesteuert werden, so daß der Flächenfilter 22 diskontinuierlich oder kontinuierlich abgereinigt wird. Außerhalb des Sammelbehälters 2 ist ein Druckluftbehälter 26 angeordnet, an den die einzelnen Düsenleitungen 25 angeschlossen sind.An embodiment of the surface filter is shown enlarged in FIGS. 5 and 6. The filter can have a grid-like structure, in particular consist of a metal grid 24. Above the metal grid 24, a plurality of nozzle tubes 25, which have the air nozzles 23, are arranged in parallel. The nozzle tubes 25 can be controlled intermittently or continuously, so that the surface filter 22 is cleaned discontinuously or continuously. A compressed air container 26, to which the individual nozzle lines 25 are connected, is arranged outside the collecting container 2.

Der Sammelbehälter 2 ist auf dem Fahrgestell 1 so angeordnet, daß er durch eine Kippbewegung entleert werden kann. Zu diesem Zweck kann er gegebenenfalls geteilt sein, um nur den unteren Teil des Behälters kippen zu müssen. Es kann ferner Vorsorge dafür getroffen sein, daß die Anschlußaggregate, wie Saugrüssel, Absaugleitung etc., stationär verbleiben. Der Sammelbehälter 2 kann entweder um eine horizontale Querachse 27 (Figur 1) nach hinten oder aber um horizontale Längsachsen 28 an der einen oder anderen Seite des Fahrgestells 1 zur Seite gekippt werden (siehe Figur 4).The collection container 2 is arranged on the chassis 1 so that it can be emptied by a tilting movement. For this purpose, it can optionally be divided so that only the lower part of the container has to be tilted. Provision can also be made to ensure that the connection units, such as the proboscis, suction line, etc., remain stationary. The collecting container 2 can either be tilted backwards about a horizontal transverse axis 27 (FIG. 1) or else about horizontal longitudinal axes 28 on one or the other side of the chassis 1 (see FIG. 4).

In Figur 7 ist der Saugrüssel 3 im Bereich des hohlzylindrischen Aufbrechwerkzeugs 10 gezeigt. Unmittelbar oberhalb der Verzahnung 17 des Aufbrechwerkzeugs 10 sind ringförmig Zuluftdüsen 29 angeordnet, die sich von unten nach oben in Transportrichtung erstrecken und in dieser Richtung verengen. Durch diese Düsen 29 wird seitlich Luft angesaugt, die injektorartig in das Aufbrechwerkzeug 10 eintritt und die Förderung des Materials unterstützt, insbesondere eine zu starke Gutbeladung des Förderstroms und dadurch ein Verstopfen des Saugrüssels oder ein Aussetzen der Förderung vermeidet.FIG. 7 shows the suction nozzle 3 in the region of the hollow cylindrical breaking tool 10. Immediately above the toothing 17 of the break-open tool 10 there are annular supply air nozzles 29 which extend from bottom to top in the direction of transport and narrow in this direction. Through these nozzles 29 air is sucked in from the side, which enters the breaker tool 10 in an injector-like manner and supports the conveying of the material, in particular prevents the feed stream from being loaded too heavily and thereby avoids clogging of the suction nozzle or suspension of the conveyance.

Die Zähne der Verzahnung 17 sind, wie aus Figur 8 ersichtlich, gegenüber der Achse des Aufbrechwerkzeugs verschwenkt bzw. angestellt derart, daß bei Drehen des Aufbrechwerkzeugs das von den Zähnen 30 gelockerte Gut nach innen gefördert wird. Das Auflockern des Erdreichs kann ferner durch Hochdruckdüsen 31, die mit Druckluft oder Druckwasser versorgt werden, unterstützt werden.As can be seen from FIG. 8, the teeth of the toothing 17 are pivoted or adjusted relative to the axis of the breaking tool in such a way that when the breaking tool is turned, the material loosened by the teeth 30 is conveyed inwards. The loosening of the soil can also be supported by high-pressure nozzles 31, which are supplied with compressed air or pressurized water.

Der Saugrüssel 3 ist an seinem unteren Ende so ausgebildet, daß auch Aufbrechwerkzeuge 32 mit verschiedenem, insbesondere geringerem Durchmesser angesetzt werden können, wie dies in Figur 9 gezeigt ist. Hiermit ist es möglich, in Zwischenräume zwischen verlegten Leitungen einzudringen.The suction nozzle 3 is designed at its lower end so that break-open tools 32 with different, in particular smaller, diameters can also be used, as shown in FIG. This makes it possible to penetrate gaps between installed cables.

Vorzugsweise ist die Verzahnung 17 an einem gesonderten Ring 33 angeordnet, der innerhalb des hohlzylindrischen Aufbrechwerkzeugs 10 geführt bzw. gelagert ist und mittels eines Preßluftmotors 34 od. dgl. in Drehschwingungen versetzt werden kann. Zu diesem Zweck weist der Preßluftmotor 34 an seinem Abtieb einen Nocken 35 auf, der in eine entsprechende Aussparung eines Ansatzes 36 an dem Ring 33 eingreift.The toothing 17 is preferably arranged on a separate ring 33 which is guided or mounted within the hollow cylindrical breaking tool 10 and which can be set into torsional vibrations by means of a compressed air motor 34 or the like. For this purpose, the compressed air motor 34 has a cam 35 on its drive which engages in a corresponding recess in a shoulder 36 on the ring 33.

In Figur 11 ist eine Ausführungsform gezeigt, bei der innerhalb des Aufbrechwerkzeugs 10 eine quer verlaufende Schneckenfräse 37 gelagert ist, die wiederum vorzugsweise mittels eines Preßluftmotors 38 angetrieben ist. Die Schneckengänge sind so ausgebildet, daß sie das von ihnen gelockerte Erdreich zum Zentrum transportieren, beispielsweise sind je ein Schneckengang 38, 39 vorgesehen, die das Erdreich von außen nach innen lockern und fördern.FIG. 11 shows an embodiment in which a transverse worm mill 37 is mounted within the breaking tool 10, which in turn is preferably driven by a compressed air motor 38. The snails are so designed that they transport the soil loosened by them to the center, for example a worm gear 38, 39 are provided, which loosen and promote the soil from the outside inwards.

In Figur 12 schließlich ist ein Zusatzgerät in Form einer Preßluftlanze 40 gezeigt, die über eine Leitung 41 an eine Preßluftquelle angeschlossen ist und an ihrem Ende mehrere, beim wiedergegebenen Ausführungsbeispiel drei Düsen 42 aufweist. Mittels der Preßluftlanze 40 kann noch an den Rohrleitungen haftendes oder aufliegendes Material abgeblasen werden.Finally, FIG. 12 shows an additional device in the form of a compressed air lance 40, which is connected to a compressed air source via a line 41 and has a plurality of nozzles 42 at the end, in the exemplary embodiment shown, three. By means of the compressed air lance 40, material adhering or resting on the pipelines can be blown off.

Claims (4)

  1. Dredger for the planned excavation of soil from pipes laid in the ground, comprising a pneumatic suction nozzle member (3), a hollow cylindrical tool (10) forming its suction piece for breaking up the soil, a collecting container (2) for the sucked up soil, into which issues the suction nozzle member (3) and in which the soil is separated from the suction air flow, an exhaust fan (4) connected to the collecting container and at least one filter (22) positioned between the orifice (18) of the suction nozzle member (3) in the collecting container (2) and the exhaust band (4), characterized in that in the vicinity of the filter or filters (22) on the suction side of the collecting container (2) air nozzles (23) and/or water nozzles (21) are located in the air flow and directed onto the filter (22), that in the vicinity of the connection (18) of the suction nozzle member (3) to the collecting container (2) and within the latter water nozzles (21) are provided and directed into the feed flow and that within the collecting container, upstream of the connection (18) of the suction nozzle member (3) an apron (19, 20) downwardly deflecting the feed flow is provided as a separator.
  2. Dredger according to claim 1, characterized in that the filter (22) on the suction side is a screen cloth filter.
  3. Dredger according to claim 1 or 2, characterized in that the air nozzles (23) and/or water nozzles (21) are located on the downflow side of the filter.
  4. Dredger according to one of the claims 1 to 3, characterized in that several air nozzles (23) and/or water nozzles (21) are located above the screen cloth filter (22) and are intermittently and/or successively controllable.
EP89120239A 1988-11-05 1989-11-01 Suction dredger Expired - Lifetime EP0368129B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3837670 1988-11-05
DE3837670A DE3837670A1 (en) 1988-11-05 1988-11-05 SUCTION EXCAVATOR

Publications (2)

Publication Number Publication Date
EP0368129A1 EP0368129A1 (en) 1990-05-16
EP0368129B1 true EP0368129B1 (en) 1993-08-04

Family

ID=6366616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120239A Expired - Lifetime EP0368129B1 (en) 1988-11-05 1989-11-01 Suction dredger

Country Status (2)

Country Link
EP (1) EP0368129B1 (en)
DE (2) DE3837670A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109653280A (en) * 2018-12-21 2019-04-19 中国水利水电科学研究院 A kind of dredging system and its dredging method of underwater material
US10752146B2 (en) 2016-03-31 2020-08-25 Rsp Gmbh Vehicle with a tiltable material collecting container as well as an emptying module
US11142886B2 (en) 2016-04-08 2021-10-12 Rsp Gmbh Method for controlling the movement of an articulated hose carrier of a suction excavator

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138619A1 (en) * 1991-01-17 1992-07-23 Heinrich Weseloh Fa Soil etc. exhauster with loose material accumulator - which has connecting branch for soil suction tube, coupling branch for suction line, and jib holder
DE4306135A1 (en) * 1993-02-27 1994-09-01 Vmb Vesta Maschbau Gmbh & Co Suction dredger
DE19520692A1 (en) * 1995-06-07 1997-01-16 Johann Katz Bautenschutz Mauer Water-barrier formation system on foundation wall - uses suction lance connected to vacuum source to excavate slit-trench for insulating component
DE29513107U1 (en) * 1995-08-16 1996-01-25 Mühlstädter, Alexander, 76889 Birkenhördt Device for making head holes and trenches
DE19608782A1 (en) * 1996-03-07 1997-09-18 Vmb Vesta Maschbau Gmbh & Co Suction conveyor device, in particular suction excavator
FR2749866B1 (en) * 1996-06-18 1998-08-28 Sdto TRENCHING DEVICE, WITH SUCTION EQUIPMENT
DE19630297A1 (en) * 1996-07-26 1998-01-29 Dieter F Bauer Waste extractor for suction excavator
DE19718868A1 (en) * 1997-05-03 1998-11-05 Rinker Karl Dipl Ing Fh Suction dredger
DE19851111C1 (en) * 1998-11-06 1999-12-02 Braun Alfons Suction dredger handling mining paydirt or slurry from drains
FR2789414B1 (en) * 1999-02-04 2001-03-30 Tracto Services DEVICE FOR PURIFYING AND MAINTAINING PITCHES, ESPECIALLY ON THE EDGE OF ROADS
DE29902562U1 (en) 1999-02-12 1999-04-29 Reschwitzer Saugbagger Produktions GmbH, 07318 Saalfeld Suction dredger
DE19962952A1 (en) * 1999-12-24 2001-06-28 Sabatec Saugbaggertechnologie Suction excavator has collection container, turbine generating suction flow, controller with closure device downstream of filter devices in flow channel for varying flow channel cross-section
FR2822862B1 (en) * 2001-03-29 2003-08-08 S D T O MOTORIZED ROAD VEHICLE FOR PRODUCING TRENCHES IN THE GROUND
EP1464762B1 (en) * 2003-04-03 2009-12-02 Alfons Braun Pneumatic excavation pipe for collecting soil and suction excavator with such an excavation tube
DE102004042720A1 (en) * 2004-03-02 2005-11-24 Braun, Alfons Multi-stage suction fan with at least two radial fans, in particular for use in a suction dredger
DE202010007463U1 (en) 2009-06-24 2010-11-04 Braun, Alfons Suction dredger with separate containers and sieves
DE202010009489U1 (en) 2010-06-24 2011-10-13 Alfons Braun Suction dredger with hydrosuction pipe
DE102010060973B4 (en) 2010-12-02 2016-02-11 Zenner Ventilatoren Gmbh Control method for the suction fan of a suction dredger
DE102010060971B4 (en) 2010-12-02 2018-02-15 Zenner Ventilatoren Gmbh Fan cascade for a suction dredger
DE102010060972B4 (en) 2010-12-02 2024-06-06 Zenner Ventilatoren Gmbh Arrangement for driving a first and second radial fan
FR2975088B1 (en) * 2011-05-11 2019-10-25 Sita Remediation MOTORIZED VEHICLE FOR IN-SITU FLOOR DEPOLLUTION
DE102011119924A1 (en) * 2011-12-02 2013-06-06 Alfons Braun Side changeable power arm
DE102016105850B4 (en) 2016-03-31 2021-02-04 Rsp Gmbh Material collection container of a suction excavator
RU2645390C1 (en) * 2017-02-08 2018-02-21 Игорь Иванович Мамаев Aggregate for cleaning waters from bottom sediments and extraction of minerals from water
US20180230666A1 (en) * 2017-02-14 2018-08-16 Ulc Robotics, Inc. Excavation system and method
DE102017108731B4 (en) 2017-04-24 2021-06-24 Reschwitzer Saugbagger Produktions Gmbh Suction excavator with swiveling filter unit
DE102018004334A1 (en) * 2018-05-30 2019-12-24 Dominic Hurm Saugbagger
CN112796361B (en) * 2020-12-25 2022-06-10 中国电建集团城市规划设计研究院有限公司 A river course desilting device for water environment is administered
CN113653117B (en) * 2021-07-30 2023-05-23 成都环美园林生态股份有限公司 Mobile dredging equipment for river ecology
CN113957941B (en) * 2021-10-22 2022-09-30 孙逊 Hydraulic engineering dredging method
DE102021128038A1 (en) 2021-10-27 2023-04-27 Rsp Gmbh Material collection container with improved seal for a suction dredger
WO2023072617A1 (en) 2021-10-27 2023-05-04 Rsp Gmbh Material collection container of a suction dredger with improved resistance to negative pressure
DE102021128037A1 (en) 2021-10-27 2023-04-27 Rsp Gmbh Material collection tank with improved rigidity and suction dredger with this
CN114232704A (en) * 2021-11-25 2022-03-25 陈飞 Scraping amplitude-adjustable sludge cleaning device and method for hydraulic engineering
CN115075322A (en) * 2022-06-28 2022-09-20 江苏筑港建设集团有限公司 Dredging process for hydraulic engineering
DE102022127966A1 (en) 2022-10-23 2024-04-25 Rsp Gmbh & Co. Kg Method for controlling an articulated arm with a mobile remote control unit spatially remote from the arm and suction dredger

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513174A (en) * 1946-02-23 1950-06-27 Selas Corp Of America Gas filter
GB2095126A (en) * 1980-11-25 1982-09-29 Heat Pumps W R Ltd Cleaning air filters

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774569A (en) * 1954-04-05 1956-12-18 Karl Oscar F Jacobsen Earth moving hydraulic suction nozzles
FR1310635A (en) * 1961-10-17 1962-11-30 Bertin & Cie Pump device usable for the removal of charged fluids
FI47423C (en) * 1965-09-18 1973-11-12 Mohn Submersible centrifugal pump.
US3612193A (en) * 1968-08-26 1971-10-12 Kajima Corp Rectangular drilling for earth excavation
US4123858A (en) * 1971-07-06 1978-11-07 Batchelder George W Versatile submersible device for dredging or other underwater functions
GB1398983A (en) * 1972-05-18 1975-06-25 British Gas Corp Excavating machines
BE873663A (en) * 1979-01-23 1979-05-16 Hartenstein Marcel EARTHWORKING PROCESS FOR LAYING PIPELINES AND CABLES IN URBAN AREAS AND DEVICE INTENDED TO CARRY OUT THE PROCESS
FR2456170A1 (en) * 1979-05-11 1980-12-05 Monnier Alain Tractor mounted suction unit for trench excavation - uses pneumatic drill to break up soil which is sucked into tipper bin for depositing subsequently
FR2584435B1 (en) * 1985-07-02 1988-04-08 Royer Jean Claude EARTH MOVING MACHINE, ESPECIALLY FOR SMALL-SIZED INTERVENTION EXCAVATIONS.
DE3710283C2 (en) * 1987-03-28 1998-04-16 Zueblin Ag Equipment for the removal and removal of contaminated soil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513174A (en) * 1946-02-23 1950-06-27 Selas Corp Of America Gas filter
GB2095126A (en) * 1980-11-25 1982-09-29 Heat Pumps W R Ltd Cleaning air filters

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10752146B2 (en) 2016-03-31 2020-08-25 Rsp Gmbh Vehicle with a tiltable material collecting container as well as an emptying module
US11142886B2 (en) 2016-04-08 2021-10-12 Rsp Gmbh Method for controlling the movement of an articulated hose carrier of a suction excavator
CN109653280A (en) * 2018-12-21 2019-04-19 中国水利水电科学研究院 A kind of dredging system and its dredging method of underwater material

Also Published As

Publication number Publication date
EP0368129A1 (en) 1990-05-16
DE3837670A1 (en) 1990-05-10
DE58905147D1 (en) 1993-09-09

Similar Documents

Publication Publication Date Title
EP0368129B1 (en) Suction dredger
EP0513582A1 (en) System and method for conveying granular material
EP0613983A1 (en) Suction dredge
EP1167631B1 (en) Mobile floor cleaning apparatus
EP0916381A2 (en) Separator of products
EP1127196B1 (en) Suction dredge for receiving and separating suction material such as soil or sludge
DE4330233C3 (en) sweeper
EP3680390A1 (en) Tunnel cleaning train
EP2815062B1 (en) Device for dry drilling using drilling debris suction
DE3824710C2 (en)
EP0801995A1 (en) Plant for separating by screening a fraction of small grain size from crushed material
EP0548707B1 (en) Method and device to increase the water depth of a watercourse
DE2655781C3 (en) Method and device for field cleaning of cleared crops
EP0563081B1 (en) Process for cleaning a drop separator and drop separator with cleaning device
DE2152807B2 (en) Device for finishing capsules for pharmaceutical use
EP0552454A2 (en) Apparatus for cleaning the filtering elements of a filter
EP0672801B1 (en) Screen element, gully and street and sewer cleaning vehicle comprising such a screen element
EP3832022B1 (en) Soil treatment machine with dust extraction and rotating filter cartridges
DE1950918C3 (en) Method and device for conveying and cleaning contaminated crops, in particular sugar beets
DE19703183C2 (en) Manure distributor
DE10018908C2 (en) Flour screening machine
EP3832021B1 (en) Soil treatment machine with dust extraction with optional filtering of the suction dust-polled air
DE2406834A1 (en) CLEANING SYSTEM FOR IMPACT CLEANING OF CONTAMINATED GRANULES
DE1290157B (en) Self-picking cleaning vehicle for streets or similar areas
DE2302265C3 (en) Mobile device for forming a pile of leaf and stalk-shaped crops

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19900613

17Q First examination report despatched

Effective date: 19910917

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT NL SE

REF Corresponds to:

Ref document number: 58905147

Country of ref document: DE

Date of ref document: 19930909

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930913

ITF It: translation for a ep patent filed
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

NLS Nl: assignments of ep-patents

Owner name: RESCHWITZER SAUGBAGGER PRODUKTIONS GMBH TE SAALFEL

EAL Se: european patent in force in sweden

Ref document number: 89120239.2

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;RESCHWITZER SAUGBAGGER PRODUKTIONS GMBH

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19961031

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19961125

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19961130

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19961202

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971130

BERE Be: lapsed

Owner name: RESCHWITZER SAUGBAGGER PRODUKTIONS G.M.B.H.

Effective date: 19971130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980601

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971101

EUG Se: european patent has lapsed

Ref document number: 89120239.2

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980601

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20001129

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010327

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020702

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020730

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051101