EP1507925B1 - Suction device and suction method for the disposal of dust in milling machines - Google Patents

Suction device and suction method for the disposal of dust in milling machines Download PDF

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Publication number
EP1507925B1
EP1507925B1 EP03727433A EP03727433A EP1507925B1 EP 1507925 B1 EP1507925 B1 EP 1507925B1 EP 03727433 A EP03727433 A EP 03727433A EP 03727433 A EP03727433 A EP 03727433A EP 1507925 B1 EP1507925 B1 EP 1507925B1
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EP
European Patent Office
Prior art keywords
duct
conveying device
milled
suction
duct section
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Expired - Lifetime
Application number
EP03727433A
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German (de)
French (fr)
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EP1507925A1 (en
Inventor
Olaf Gaertner
Christian Berning
Dieter Simons
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Wirtgen GmbH
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Wirtgen GmbH
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/50—Methods or devices for preventing dust by spraying or sucking

Definitions

  • the invention relates to a self-propelled milling machine for processing of ground surfaces, in particular roadways, according to the preamble of claim 1, such as a method for disposing of dusts and vapors generated during the milling process on a milling machine according to the preamble of claim 14.
  • Such milling machines are also referred to as road milling.
  • a Frontladerfräse is known for example from DE-A 39 03 482 or DE-A 38 31 161.
  • the known milling machines have a self-propelled chassis with a front wheel pair and a rear wheel pair.
  • the chassis carries a machine frame in which a milling drum is mounted transversely to the direction of travel.
  • the milling drum is usually surrounded by a housing in which the pointing in the direction of travel wall is designed as a cover plate with a passage opening for the milled material.
  • the rearward in the direction of travel wall is designed as a scraper and is pressed against the milled surface to seal the roller box to the rear to supply the milled material completely to the removal.
  • the processed from the milling drum material is dropped from the milling drum on a first conveyor belt, the processed material at the front end of the Milling machine transfers to a discharge belt, which is for transport to a loading area of a truck in the inclination and laterally pivotable.
  • the so-called rear loader is known for example from DE-A 34 05 473.
  • the passage opening for the milled material facing in the opposite direction of travel also designed as a scraper wall of the roller housing.
  • the milled from the milling drum material is transferred directly to the conveyor belt serving as a discharge belt, which is arranged at the rear end of the milling machine to convey it to a truck.
  • the discharge conveyor of the rear-loading router can be tilted and swiveled sideways.
  • the milling drum such road milling machines is equipped with chisel tools that form a conveyor coil that transports the milled material to the passage opening of the cover.
  • the invention is therefore an object of the invention to provide a milling machine of the type mentioned above, as well as a method for disposing of dusts and vapors, in which with less mechanical complexity and with higher efficiency during the milling process and the transport process resulting dusts and vapors can be sucked off and together with the processed material can be disposed of.
  • the invention advantageously provides for the suction device to be connected to a first channel section of the channel downstream of the first transfer point and to extract the air contaminated during milling essentially in the material transport direction in the first channel section, the contaminated air also being conveyed to the milling drum is sucked off.
  • the invention enables a simple construction, in which the structure of a milling machine does not have to be fundamentally changed, so that a retrofitting of existing milling machines is possible.
  • Extraction of contaminated air in the first section of the duct allows extraction near the largest source of contamination where dusts and vapors are generated.
  • dusts are generated by rupturing the soil surface and vapors due to the high temperatures of milling, e.g. when milling asphalt materials.
  • dusts in the area of the transport device can also be created by transporting the milled material.
  • the arrangement of the suction device in the first channel section of the transport device allows the application of a strong flow of air in the region of the milling drum and the first channel section, thereby preventing dusts or vapors from escaping at the milling drum or at the first channel section.
  • Dusts and vapors can therefore be reliably sucked onto the transport device in the working area of the milling drum and at the transfer point of the milling drum.
  • a major advantage is the improvement of the working conditions on the control station and in the vicinity of the milling machine and the low susceptibility of the transport device. In addition, the milled soil surface is left clean.
  • a significant advantage of the disposal of dusts and vapors on the discharge of the transport device is that at this point a dust is almost inevitable, since the milled material is dropped from a height of several meters on the back of a transport vehicle.
  • the invention provides in an advantageous manner that the dusts and vapors are disposed of exactly where the dust is inevitable anyway. There, for safety reasons, the stay is strictly prohibited.
  • the working area on the control station and next to the machine is free of dusts and vapors and especially of their breathable fractions.
  • the second channel section is separated by separating means from the first channel section for blocking an air flow, without obstructing a transport of the material.
  • the suction device has a suction channel connected to the first channel section and an axial fan integrated into the suction channel.
  • the contaminated air is disposed of from the first channel section via the suction channel, wherein the integrated into the suction channel Axial fan for a high negative pressure and a high air flow speed at the suction points provides.
  • Another advantage of the axial fan is that it can be integrated into the suction channel and therefore arranged to save space and at the same time can be arranged close to the suction points.
  • Another advantage of the axial fan is its dirt resistance and its self-cleaning effect. The high suction power not only allows breathing of breathable dusts and vapors, but also coarser dust particles.
  • the suction device disposed of the contaminated air at the point at which occurs anyway dust development due to the dropping of the milled material from the transport device.
  • the downstream end of the suction channel opens into an upper portion of the second channel portion of the channel formed by the transport device.
  • the downstream end of the suction channel opens into a second channel section, which is separated from the first channel section with separating means for shutting off an air flow, without the transport of the milled material being hindered. Accordingly, a subdivided channel is formed, which extends over the entire length of the transport device, the subdivisions being effected by the separating means, which on the one hand do not hinder the transport of the milled material and on the other hand prevent an air flow against the material transport direction. In this way, the channel sections are mutually sealed airtight to each other substantially.
  • the transport device has at least one conveyor belt with a conveyor belt, and that sealing means for the channel consist of hoods sealing against the conveyor belt or against the housing of the conveyor belt.
  • the hoods thus form together with the conveyor belt or together with the housing of the conveyor belt a closed channel, so that the milled material passes through the transport device circumferentially completely enclosed. In this way, no dusts or vapors can escape to the outside.
  • a second transport device can take over the milled material at the end of the first transport device at a second transfer point.
  • the transfer point between the first and second transport means is sealed with flexible sealing means fixed to at least one of the transport means. Smaller gaps are irrelevant, since both the first channel section and the lower part of the second channel section are under negative pressure, so that at any leaks no contaminated air can escape, but at most air is sucked.
  • the suction channel preferably enters the second channel section at an acute angle and just before the discharge end.
  • the entry angle enhances the injection effect, so that without an additional suction device and the lower part of the second channel portion is reliably sucked.
  • an agglomeration device is arranged behind the mouth of the suction channel in the second channel section.
  • the dusts and vapors can be agglomerated or condensed so that they can be disposed of together with the milled material.
  • the agglomeration device can consist, for example, of a water spraying device arranged at the outlet of the transport device. With the help of the water spraying device, the dusts can be bound and agglomerated and also the vapors are condensed.
  • At least one flexible flap which closes the first channel section of the transport device against air ingress against the material transport direction, is arranged downstream of and near the suction nozzle of the suction device.
  • the milled material can pivot the flap, while an air inlet is prevented against the material transport device.
  • the negative pressure in front of the flap thereby reinforces the seal by sucking the flap onto the milled material located on the conveyor belt.
  • the separating means is preferably provided on the first transport device.
  • the flap can be divided several times by vertically extending slots, so that the flap can adapt to the contour of the transported material on the conveyor belt.
  • a plurality of flaps, divided and / or undivided, are provided one behind the other between the first and second channel sections.
  • the transport device On the sides of the at least one conveyor belt, the transport device on hood carrier, which are sealed with an elastic lip against the conveyor belt.
  • the conveyor belt with the elastic lip, the hood carrier and the hoods forms a completely closed channel cross-section, which tightly encloses the transported milled material.
  • the channel cross section can also be formed by a plurality of hood parts.
  • the steps specified in claim 14 are provided.
  • FIG. 1 A milling machine 1 for working surfaces in the embodiment of a front-end mill is shown in FIG. It is understood that the invention is also applicable to other types of milling machines, which are provided with at least one transport device 14,18.
  • the milling machine 1 is used for milling off ground surfaces, in particular roadways made of asphalt, concrete or the like.
  • the milling machine 1 has a chassis with, for example, four traveling wheels 4 formed from chain wheels, which supports the machine frame 2.
  • a milling drum 8 is mounted, which extends transversely to the direction of travel. The milling depth is adjusted by means of the height adjustment of the vessels 4.
  • the milling machine 1 shown in Fig. 1 is also referred to as a front loading milling machine, since it conveys the milled material in the direction of travel forward on a transport vehicle 10.
  • a first conveying device 14 consisting of a conveyor belt with a conveyor belt 15 is arranged in a shaft 9 of the machine frame 2, which runs at an angle of inclination into the machine frame 2.
  • the first transport device 14 conveys the milled material 3 on the conveyor belt 15 to a second transporting device 18 comprising a conveyor belt with a further conveyor belt 19.
  • the second transport device 18 is height-adjustable via an adjustable angle of inclination and can additionally be pivoted laterally and, for example, ⁇ 30 °, so that even standing next to the lane of the front loading milling machine stationary transport vehicles 10 can be loaded.
  • the milling drum 8 is usually surrounded by a roller box 58, wherein the pointing in the direction of travel wall is formed as a shield 52 with a passage opening 56 for the milled material.
  • the milling drum 8 is provided with helically arranged chisel tools, which are arranged so that the milled material is transported to the passage opening 56 in the shield 52.
  • a wall 60 of the roller box 58 At the rear end of the roller box 58 in the direction of travel, there is provided a wall 60 of the roller box 58, which closes off the milled bottom surface, and which removes the milled bottom surface so that no fragments of the milled material remain on the milled ground surface.
  • the wall 60 is pressed with its lower edge hydraulically against the ground surface in order to achieve the best possible seal.
  • a belt shoe 50 is fixed in height adjustable as a band protection and support device in a guide.
  • the belt shoe 50 receives the rear end of the first conveyor 14.
  • the passage opening 56 of the roller box 58 forms a first transfer point 5, at which the milled material is transferred from the milling drum 8 to the first transport device 14.
  • the control station is in the embodiment of FIG. 1 above the milling drum 8, but can be arranged as usual in milling machines in the rear or front region of the machine frame 2.
  • FIG. 2 shows in detail the first transport device 14.
  • the transport device 14 is mounted in a preferably centrally located shaft 9 of the machine frame 2 and can be easily disassembled from the belt shoe 50 for maintenance purposes and removed through the shaft 9 therethrough.
  • the transporting device 14 with the conveyor belt 15 has a hood 22 which, together with the upper run 15a of the conveyor belt 15, forms a channel section 16a of a channel 16 which extends from the roller box 56 to the end of the second transport device 18.
  • the hood 22 of the first transport means 14 by means of hood supports 44 is attached to the frame of the first transport means 14.
  • Elastic lips 46 are on the hood brackets 44 on both sides of the conveyor belt attached and touch the upper run 15a of the conveyor belt 15 in the edge region over the entire length of the upper run 15a.
  • the second transport device 18 is provided with a hood 26, which is also sealed by sealing lips 46 against the upper run of the conveyor belt 19 and is mounted on corresponding hood carriers 44.
  • the channel 16 is sealed dust and gas tight against the environment.
  • the hood 22 of the first transport device 14 has a substantially vertically upwardly projecting nozzle 23, to which a suction channel 24 can be connected.
  • the machine frame 2 has in its center a substantially vertical shaft 25, through which the suction channel 24 can emerge upwards out of the machine frame 2.
  • an axial fan 28 is integrated into the suction channel 24. This has the advantage that the space required for a fan is minimized.
  • the axial fan 28 enables a high air flow rate and thus generates a correspondingly high negative pressure in the first channel section 16a and in the drum box 56 surrounding the milling drum 8.
  • the flaps 36 are provided with slots.
  • a plurality of flaps 36 are arranged one behind the other to achieve an improved air seal between the channel sections 16a, 16b.
  • the conveyor belt 15 is, as best seen in Fig. 3, guided over support rollers 62,64, wherein the upper run 15a forms a substantially U-shaped groove by the support rollers 64 are inclined accordingly.
  • the lower support roller 62 supports the lower run 15b of the conveyor belt 15. As shown in FIGS. 3 and 4 can be seen, there are 15 webs 17 on the surface of the conveyor belt, which improve the entrainment of the milled material 3 on the conveyor belt 15.
  • the milled material 3 is transferred at the second transfer point 7 into a receiving hopper 35 of the second transport device 18, whereby the milled material 3 is conveyed via the conveyor belt 19 to the discharge end and disposed of on the transport vehicle 10.
  • the transition point at the transfer point 7 is enclosed by sealing means consisting of flexible mats 30, so that the first transporting device 14 and the second transporting device 18 form a circumferentially sealed channel 16, which is continuous in the material transporting direction.
  • the suction channel 24 is connected at its other end to the hood 26 of the second transport device 18, wherein the connecting piece 27 preferably enters the channel portion 16b at a shallow angle to inject in the channel portion 16b at the high flow rate of the extracted polluted air generate, whereby the lower part of the channel portion 16 b is sucked.
  • gaps for sucking in air can be left free at suitable points in the area of the second transfer point 7, for example at the sealing means 30.
  • the milled material is dropped, with the milled material 6, the extracted dust and vapor-laden air is disposed of together with the milled material 3.
  • an agglomeration device 34 is provided, with the aid of which dusts can be connected and possibly existing vapors can be condensed.
  • the agglomeration device 34 may consist of a water spray device, wherein the dust and vapors are deposited, for example, with a spray.
  • the agglomeration device 34 is preferably arranged outside the channel section 16b at the discharge end of the second transport device 18, but could also be arranged within the second channel section 16b.
  • the milling machine 1 would also be usable without agglomeration device 34, since the dusts and vapors are disposed very far away from the control station, so that the working conditions on the control station and in the work area around the machine around even without agglomeration device 34 are significantly improved.
  • Fig. 5 shows a second embodiment of the invention on the example of a rear loading router 11 with only a single transport device 14.
  • a rear loading router is the passage opening for the milled material 3 in the counter to the direction of travel, designed as a scraper wall 61 of the roller box 58th
  • the milled from the milling drum 8 material 3 is transferred directly to this transfer point 5 on the conveyor belt of the single transport device 14, which is arranged at the rear end of the rear loading router 11.
  • the conveyor belt 15 of the transport device 14 conveys the milled material onto a transport vehicle 10.
  • the transport device 14, like the transport device 18 of the exemplary embodiment of FIG. 1, can be pivoted both in the inclination and laterally.
  • the connecting piece 23 is connected directly to an upper hood part 22a of the transport device 14 at the lower end.
  • flexible flaps 36 As separating means between the channel sections 16a, 16b are used, as in the first embodiment, flexible flaps 36, as shown in FIG. 4, abut against the upper run 15a of the conveyor belt 15.
  • a plurality of flaps are arranged one behind the other, which ensures unimpeded transport of the milled material 3 from the first channel section 16a into the second channel section Allow 16 b, however, largely prevents air flow between the two channel sections 16 a, 16 b.
  • the contaminated air extracted via the suction channel 24 re-enters the channel 16 at the upper end of the conveyor 14, namely into the channel section 16b in the vicinity of the discharge end of the transport device 14.
  • Fig. 6 shows a second embodiment of a hood 22, which is formed from two hood parts 22a, 22b.
  • the sealing lips 46 can be omitted, in which case the channel cross-section is defined by the complementary hood parts 22a and 22b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Disintegrating Or Milling (AREA)
  • Road Repair (AREA)
  • Cleaning In General (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)
  • Prevention Of Fouling (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Disclosed is an automotive milling machine for machining ground surfaces, comprising an engine frame ( 2 ), a movable milling drum ( 8 ) which is mounted on the engine frame ( 2 ), at least one conveying device ( 14,18 ) which is arranged on the engine frame ( 2 ) and takes over the milled material ( 3 ) from the milling drum ( 8 ) at a transfer location ( 5 ), and a device ( 20 ) sucking off the air that is polluted with dust and fumes. The milled material ( 3 ) is enclosed by a duct ( 16,16 a, 16 b) on the at least one conveying device ( 14,18 ), said duct ( 16 ) being separated into two sections ( 16 a ,16 b). The suction device ( 20 ) is connected to the first section ( 16 a) of the duct ( 16 ) downstream from the first transfer location ( 5 ) and sucks off the air that has been polluted during milling at the milling drum ( 8 ) as well as inside the first section ( 16 a) of the duct ( 16 ) essentially in the direction in which the material is conveyed.

Description

Die Erfindung betrifft eine selbstfahrende Fräsmaschine zum Bearbeiten von Bodenoberflächen, insbesondere Fahrbahnen, nach dem Oberbegriff des Anspruchs 1, wie ein Verfahren zum Entsorgen von während der Fräsbearbeitung entstehenden Stäuben und Dämpfen an einer Fräsmaschine nach dem Oberbegriff des Anspruchs 14.The invention relates to a self-propelled milling machine for processing of ground surfaces, in particular roadways, according to the preamble of claim 1, such as a method for disposing of dusts and vapors generated during the milling process on a milling machine according to the preamble of claim 14.

Derartige Fräsmaschinen werden auch als Straßenfräsen bezeichnet.Such milling machines are also referred to as road milling.

Eine Frontladerfräse ist beispielsweise aus der DE-A 39 03 482 oder der DE-A 38 31 161 bekannt. Die bekannten Fräsmaschinen weisen ein selbstfahrendes Fahrgestell mit einem Vorderradpaar und einem Hinterradpaar auf. Das Fahrgestell trägt einen Maschinenrahmen, in dem eine Fräswalze quer zur Fahrtrichtung gelagert ist. Um einen möglichst vollständigen Abtransport des abgefrästen Materials zu erreichen, ist die Fräswalze in der Regel von einem Gehäuse umgeben, bei dem die in Fahrtrichtung weisende Wand als Abdeckschild mit einer Durchtrittsöffnung für das abgefräste Material ausgebildet ist. Die in Fahrtrichtung rückwärtige Wand ist als Abstreifer ausgeführt und wird gegen die abgefräste Oberfläche angedrückt, um den Walzenkasten nach hinten abzudichten, um das Fräsgut restlos dem Abtransport zuzuführen. Das von der Fräswalze abgearbeitete Material wird von der Fräswalze auf ein erstes Transportband abgeworfen, das das abgearbeitete Material am vorderen Ende der Fräsmaschine auf ein Abwurfband überträgt, das zum Transport auf eine Ladefläche eines Lastkraftwagens in der Neigung und seitlich verschwenkbar ist.A Frontladerfräse is known for example from DE-A 39 03 482 or DE-A 38 31 161. The known milling machines have a self-propelled chassis with a front wheel pair and a rear wheel pair. The chassis carries a machine frame in which a milling drum is mounted transversely to the direction of travel. In order to achieve the most complete removal of the milled material, the milling drum is usually surrounded by a housing in which the pointing in the direction of travel wall is designed as a cover plate with a passage opening for the milled material. The rearward in the direction of travel wall is designed as a scraper and is pressed against the milled surface to seal the roller box to the rear to supply the milled material completely to the removal. The processed from the milling drum material is dropped from the milling drum on a first conveyor belt, the processed material at the front end of the Milling machine transfers to a discharge belt, which is for transport to a loading area of a truck in the inclination and laterally pivotable.

Eine andere Ausführungsform dieser Straßenfräsen, die sogenannte Heckladerfräse, ist beispielsweise aus DE -A 34 05 473 bekannt. Hier befindet sich die Durchtrittsöffnung für das abgefräste Material in der entgegen der Fahrtrichtung weisenden, ebenfalls als Abstreifer ausgebildeten Wand des Walzengehäuses. Das von der Fräswalze abgefräste Material wird dabei direkt auf das als Abwurfband dienende Transportband übertragen, das am hinteren Ende der Fräsmaschine angeordnet ist, um es auf einen Lastkraftwagen zu befördern. Wie das Abwurfband der Frontladerfräse kann auch das Abwurfband der Heckladerfräse in der Neigung und seitlich verschwenkbar sein.Another embodiment of this road milling machine, the so-called rear loader, is known for example from DE-A 34 05 473. Here is the passage opening for the milled material facing in the opposite direction of travel, also designed as a scraper wall of the roller housing. The milled from the milling drum material is transferred directly to the conveyor belt serving as a discharge belt, which is arranged at the rear end of the milling machine to convey it to a truck. Like the discharge conveyor of the front-loading router, the discharge conveyor of the rear-loading router can be tilted and swiveled sideways.

Die Fräswalze solcher Straßenfräsen ist mit Meißelwerkzeugen bestückt, die eine Förderwendel bilden, die das abgefräste Material zur Durchtrittsöffnung des Abdeckschildes transportiert.The milling drum such road milling machines is equipped with chisel tools that form a conveyor coil that transports the milled material to the passage opening of the cover.

Durch Abfräsen der Bodenoberfläche und durch das Transportieren des abgearbeiteten Materials entstehen Stäube und Dämpfe, die einerseits die Funktionsfähigkeit der Transporteinrichtungen beeinträchtigen können und andererseits die Arbeitsbedingungen für den Maschinenführer auf dem Fahrstand und für das weitere Bedienungspersonal um die Fräsmaschine herum verschlechtern und unter Umständen auch die Sicht für den möglicherweise vorbeifließenden Straßenverkehr behindern.By milling the soil surface and by transporting the processed material dust and fumes, on the one hand affect the functioning of the transport facilities and on the other hand deteriorate the working conditions for the operator on the control room and for the other operators around the milling machine and possibly also the view for the traffic passing by.

Es ist aus der EP 0 971 075 bereits bekannt, die Transportbänder einer Fräsmaschine mit einer Haube zu versehen, den entstehenden Staub an der Fräswalze und unter der Haube der Transportbänder entgegen der Transportrichtung abzusaugen und über ein Gebläse und eine Filtereinrichtung am hinteren Ende der Fräsmaschine zu entsorgen. Nachteilig ist dabei, dass ein Absaugen an den Transportbänder entgegen der Transportrichtung erfolgt. Dadurch dass die staubhaltige Luft in Fahrtrichtung nach hinten und entgegen der eigentlichen Materialtransportrichtung abgesaugt wird, ist ein erheblicher Mehraufwand für die Umrüstung der Maschine und eine deutlich höhere Luftförderleistung des Gebläses erforderlich. Die Verwendung eines Radiallüfters am hinteren Ende der Fräsmaschine hat den Nachteil, dass kein ausreichend hoher Luftstrom an den in Fahrtrichtung vorderen Transportbändern erzielbar ist. Schließlich werden die an dem Gebläse und an dem Zyklonfilter ausgeschiedenen Partikel wieder auf die Bodenoberfläche abgeworfen, wodurch die soeben abgefräste Bodenoberfläche wieder verunreinigt wird. Der am hinteren Ende der Maschine vorgesehene Zyklonfilter kann nur die gröberen Partikel ausscheiden, nicht dagegen die lungengängigen Feinstäube, so dass die Anordnung des Luftauslasses am hinteren Ende der Fräsmaschine zu nah am Fahrstand angeordnet ist. Gleiches gilt für ein maschengitterförmiges Filter, das ebenfalls nicht in der Lage ist, atembare Stäube auszuscheiden. Ein weiterer Nachteil nach dem Stand der Technik besteht darin, dass Stäube und Dämpfe am hinteren Ende der Fräsmaschine in der Nähe des Fahrstandes abgeblasen werden, und dass desweiteren beim Abwurf des abgefrästen Materials an dem vorderen Transportband zwangsläufig erneut Stäube entstehen.It is already known from EP 0 971 075 to provide the conveyor belts of a milling machine with a hood, to suck the resulting dust on the milling drum and under the hood of the conveyor belts against the transport direction and via a fan and a filter device at the rear end of the milling machine to dispose. The disadvantage here is that suction takes place on the conveyor belts against the transport direction. The fact that the dust-laden air is sucked in the direction of travel to the rear and against the actual material transport direction, a significant overhead for the conversion of the machine and a significantly higher air flow rate of the blower is required. The use of a radial fan at the rear end of the milling machine has the disadvantage that no sufficiently high air flow at the front in the direction of travel conveyor belts can be achieved. Finally, the particles excreted on the blower and on the cyclone filter are thrown back onto the soil surface, whereby the soil surface which has just been milled off is again contaminated. The provided at the rear end of the machine cyclone filter can excrete only the coarser particles, but not the respirable particulate matter, so that the arrangement of the air outlet at the rear end of the milling machine is located too close to the control station. The same applies to a mesh-like filter, which is also unable to eliminate breathable dusts. Another disadvantage of the prior art is that dust and vapors are blown off at the rear end of the milling machine in the vicinity of the control station, and that further arise when dropping the milled material on the front conveyor belt inevitably dusts again.

Eine weitere Absaugeinrichtung zur Staubertsorgung einer Fräsmaschine ist aus der EP-A-0853985 bekannt.Another suction device for Staubertsorgung a milling machine is known from EP-A-0853985.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Fräsmaschine der eingangs genannten Art, sowie ein Verfahren zum Entsorgen von Stäuben und Dämpfen zu schaffen, bei der mit geringerem maschinellen Aufwand und mit höherer Effektivität beim Fräsvorgang und beim Transportvorgang entstehende Stäube und Dämpfe abgesaugt werden können und gemeinsam mit dem abgearbeiteten Material entsorgt werden können.The invention is therefore an object of the invention to provide a milling machine of the type mentioned above, as well as a method for disposing of dusts and vapors, in which with less mechanical complexity and with higher efficiency during the milling process and the transport process resulting dusts and vapors can be sucked off and together with the processed material can be disposed of.

Zur Lösung dieser Aufgabe dienen die Merkmale des Anspruchs 1 bzw. 14.To solve this problem serve the features of claim 1 and 14th

Die Erfindung sieht in vorteilhafter Weise vor, dass die Absaugeinrichtung an einen der Transporteinrichtung zugeordneten ersten Kanalabschnitt des Kanals stromabwärts der ersten Übergabestelle angeschlossen ist und die beim Fräsen verunreinigte Luft im wesentlichen in Materialtransportrichtung in dem ersten Kanalabschnitt absaugt, wobei die verunreinigte Luft auch an der Fräswalze abgesaugt wird.The invention advantageously provides for the suction device to be connected to a first channel section of the channel downstream of the first transfer point and to extract the air contaminated during milling essentially in the material transport direction in the first channel section, the contaminated air also being conveyed to the milling drum is sucked off.

Die Erfindung ermöglicht eine einfache Konstruktion, bei der der Aufbau einer Fräsmaschine nicht grundsätzlich geändert werden muss, so dass auch ein Nachrüsten bestehender Fräsmaschinen möglich ist.The invention enables a simple construction, in which the structure of a milling machine does not have to be fundamentally changed, so that a retrofitting of existing milling machines is possible.

Das Absaugen der verunreinigten Luft in dem ersten Kanalabschnitt ermöglicht eine Absaugung in der Nähe der größten Verunreinigungsquelle, an der Stäube und Dämpfe entstehen. An der Fräswalze entstehen Stäube durch das Aufbrechen der Bodenoberfläche und Dämpfe aufgrund der hohen Temperaturen beim Fräsen, z.B. beim Abfräsen von Asphaltmaterialien. Im weiteren Verlauf können auch Stäube im Bereich der Transporteinrichtung durch den Transport des abgefrästen Materials entstehen. Die Anordnung der Absaugeinrichtung in dem ersten Kanalabschnitt der Transporteinrichtung ermöglicht die Aufbringung einer starken Luftströmung im Bereich der Fräswalze und des ersten Kanalabschnittes, wodurch vermieden wird, dass an der Fräswalze oder an dem ersten Kanalabschnitt, Stäube oder Dämpfe austreten können. Stäube und Dämpfe können daher im Arbeitsbereich der Fräswalze und an der Übergabestelle der Fräswalze auf die Transporteinrichtung zuverlässig abgesaugt werden. Ein wesentlicher Vorteil ist dabei die Verbesserung der Arbeitsbedingungen auf dem Fahrstand und in der Umgebung der Fräsmaschine und die geringe Störanfälligkeit der Transporteinrichtung. Außerdem wird die abgefräste Bodenoberfläche sauber hinterlassen. Ein wesentlicher Vorteil der Entsorgung der Stäube und Dämpfe über den Abwurf der Transporteinrichtung besteht darin, dass an dieser Stelle eine Staubentwicklung nahezu unvermeidlich ist, da das abgefräste Material aus einer Höhe von mehreren Metern auf die Ladefläche eines Transportfahrzeuges abgeworfen wird. Die Erfindung sieht in vorteilhafter Weise vor, dass die Stäube und Dämpfe genau da entsorgt werden, wo ohnehin die Staubentwicklung unvermeidlich ist. Dort ist aus Arbeitssicherheitsgründen der Aufenthalt auch streng untersagt. Dagegen ist der Arbeitsbereich auf dem Fahrstand und neben der Maschine von Stäuben und Dämpfen und insbesondere von deren atembaren Fraktionen befreit.Extraction of contaminated air in the first section of the duct allows extraction near the largest source of contamination where dusts and vapors are generated. At the milling drum, dusts are generated by rupturing the soil surface and vapors due to the high temperatures of milling, e.g. when milling asphalt materials. As the process progresses, dusts in the area of the transport device can also be created by transporting the milled material. The arrangement of the suction device in the first channel section of the transport device allows the application of a strong flow of air in the region of the milling drum and the first channel section, thereby preventing dusts or vapors from escaping at the milling drum or at the first channel section. Dusts and vapors can therefore be reliably sucked onto the transport device in the working area of the milling drum and at the transfer point of the milling drum. A major advantage is the improvement of the working conditions on the control station and in the vicinity of the milling machine and the low susceptibility of the transport device. In addition, the milled soil surface is left clean. A significant advantage of the disposal of dusts and vapors on the discharge of the transport device is that at this point a dust is almost inevitable, since the milled material is dropped from a height of several meters on the back of a transport vehicle. The invention provides in an advantageous manner that the dusts and vapors are disposed of exactly where the dust is inevitable anyway. There, for safety reasons, the stay is strictly prohibited. On the other hand, the working area on the control station and next to the machine is free of dusts and vapors and especially of their breathable fractions.

Der zweite Kanalabschnitt ist mit Trennmitteln von dem ersten Kanalabschnitt zum Sperren einer Luftströmung abgetrennt, ohne dass ein Transport des Materials behindert wird.The second channel section is separated by separating means from the first channel section for blocking an air flow, without obstructing a transport of the material.

Vorzugsweise ist vorgesehen, dass die Absaugeinrichtung einen an den ersten Kanalabschnitt angeschlossenen Absaugkanal und einen in den Absaugkanal integrierten Axiallüfter aufweist. Die verunreinigte Luft wird von dem ersten Kanalabschnitt über den Absaugkanal entsorgt, wobei der in den Absaugkanal integrierte Axiallüfter für einen hohen Unterdruck und eine hohe Luftströmungsgeschwindigkeit an den Absaugstellen sorgt. Ein weiterer Vorteil des Axiallüfters besteht darin, dass dieser in den Absaugkanal integriert werden kann und daher platzsparend angeordnet ist und gleichzeitig nah an den Absaugstellen angeordnet werden kann. Ein weiterer Vorteil des Axiallüfters ist seine Schmutzunempfindlichkeit und sein Selbstreinigungseffekt. Die hohe Absaugleistung ermöglicht es nicht nur atembare Stäube und Dämpfe abzusaugen, sondern darüber hinaus auch gröbere Staubpartikel.It is preferably provided that the suction device has a suction channel connected to the first channel section and an axial fan integrated into the suction channel. The contaminated air is disposed of from the first channel section via the suction channel, wherein the integrated into the suction channel Axial fan for a high negative pressure and a high air flow speed at the suction points provides. Another advantage of the axial fan is that it can be integrated into the suction channel and therefore arranged to save space and at the same time can be arranged close to the suction points. Another advantage of the axial fan is its dirt resistance and its self-cleaning effect. The high suction power not only allows breathing of breathable dusts and vapors, but also coarser dust particles.

Die Absaugeinrichtung entsorgt die verunreinigte Luft an der Stelle, an der ohnehin eine Staubentwicklung infolge des Abwurfs des abgefrästen Materials von der Transporteinrichtung erfolgt.The suction device disposed of the contaminated air at the point at which occurs anyway dust development due to the dropping of the milled material from the transport device.

Gemäß einer Weiterbildung der Erfindung ist vorgesehen, dass das stromabwärtige Ende des Absaugkanals in einem oberen Abschnitt des durch die Transporteinrichtung gebildeten zweiten Kanalabschnitts des Kanals mündet. Durch die Rückführung der abgesaugten verunreinigten Luft in den zweiten Kanalabschnitt der Transporteinrichtung besteht die Möglichkeit, die verunreinigte Luft fern von dem Fahrerstand der Fräsmaschine gemeinsam mit dem abgefrästen Material zu entsorgen. Durch den Eintritt der verunreinigten Luft in den zweiten Kanalabschnitt wird aufgrund der Injektionswirkung auch der zweite Kanalabschnitt in Materialtransportrichtung abgesaugt.According to one embodiment of the invention it is provided that the downstream end of the suction channel opens into an upper portion of the second channel portion of the channel formed by the transport device. By returning the extracted contaminated air in the second channel section of the transport device, it is possible to dispose of the contaminated air far away from the driver's station of the milling machine together with the milled material. Due to the injection effect, the second channel section is also sucked away in the material transport direction due to the entry of the contaminated air into the second channel section.

Das stromabwärtige Ende des Absaugkanals mündet in einen zweiten Kanalabschnitt, der von dem ersten Kanalabschnitt mit Trennmitteln zum Absperren einer Luftströmung abgetrennt ist, ohne dass der Transport des abgefrästen Materials behindert wird. Es wird demzufolge ein unterteilter Kanal gebildet, der sich über die gesamte Länge der Transporteinrichtung erstreckt, wobei die Unterteilungen durch die Trennmittel erfolgt, die einerseits den Transport des abgefrästen Materials nicht behindern und andererseits eine Luftströmung entgegen der Materialtransportrichtung verhindern. Auf diese Weise sind die Kanalabschnitte untereinander im wesentlichen luftdicht gegeneinander abgedichtet.The downstream end of the suction channel opens into a second channel section, which is separated from the first channel section with separating means for shutting off an air flow, without the transport of the milled material being hindered. Accordingly, a subdivided channel is formed, which extends over the entire length of the transport device, the subdivisions being effected by the separating means, which on the one hand do not hinder the transport of the milled material and on the other hand prevent an air flow against the material transport direction. In this way, the channel sections are mutually sealed airtight to each other substantially.

Vorzugsweise ist vorgesehen, dass die Transporteinrichtung mindestens ein Transportband mit einem Fördergurt aufweist, und dass Abdichtmittel für den Kanal aus gegen den Fördergurt oder gegen das Gehäuse des Transportbandes abdichtenden Hauben bestehen. Die Hauben bilden somit gemeinsam mit dem Fördergurt bzw. gemeinsam mit dem Gehäuse des Transportbandes einen geschlossenen Kanal, so dass das abgefräste Material die Transporteinrichtung umfangsmäßig vollständig umschlossen durchläuft. Auf diese Weise können keine Stäube oder Dämpfe nach außen austreten.It is preferably provided that the transport device has at least one conveyor belt with a conveyor belt, and that sealing means for the channel consist of hoods sealing against the conveyor belt or against the housing of the conveyor belt. The hoods thus form together with the conveyor belt or together with the housing of the conveyor belt a closed channel, so that the milled material passes through the transport device circumferentially completely enclosed. In this way, no dusts or vapors can escape to the outside.

Eine zweite Transporteinrichtung kann das abgefräste Material am Ende der ersten Transporteinrichtung an einer zweiten Übergabestelle übernehmen.A second transport device can take over the milled material at the end of the first transport device at a second transfer point.

Die Übergabestelle zwischen der ersten und zweiten Transporteinrichtung ist mit flexiblen Abdichtmittein abgedichtet, die an mindestens einer der Transporteinrichtungen befestigt sind. Kleinere Lücken sind dabei unerheblich, da sowohl der erste Kanalabschnitt als auch der untere Teil des zweiten Kanalabschnitts unter Unterdruck stehen, so dass an etwaigen Undichtigkeitsstellen keine verunreinigte Luft austreten kann, sondern allenfalls Luft angesaugt wird.The transfer point between the first and second transport means is sealed with flexible sealing means fixed to at least one of the transport means. Smaller gaps are irrelevant, since both the first channel section and the lower part of the second channel section are under negative pressure, so that at any leaks no contaminated air can escape, but at most air is sucked.

Der Absaugkanal tritt vorzugsweise unter einem spitzen Winkel und kurz vor dem Abwurfende in den zweiten Kanalabschnitt ein. Der Eintrittswinkel verstärkt die Injektionswirkung, so dass ohne eine zusätzliche Absaugeinrichtung auch der untere Teil des zweiten Kanalabschnitts zuverlässig besaugt wird.The suction channel preferably enters the second channel section at an acute angle and just before the discharge end. The entry angle enhances the injection effect, so that without an additional suction device and the lower part of the second channel portion is reliably sucked.

Bei einer bevorzugten Weiterbildung der Erfindung ist vorgesehen, dass hinter der Einmündung des Absaugkanals in den zweiten Kanalabschnitt eine Agglomerationseinrichtung angeordnet ist. Mit Hilfe der Agglomerationseinrichtung können die Stäube und Dämpfe agglomeriert bzw. kondensiert werden, so dass sie gemeinsam mit dem abgefrästen Material entsorgt werden können.In a preferred embodiment of the invention, it is provided that an agglomeration device is arranged behind the mouth of the suction channel in the second channel section. With the help of the agglomeration device, the dusts and vapors can be agglomerated or condensed so that they can be disposed of together with the milled material.

Die Agglomerationseinrichtung kann beispielsweise aus einer am Austritt der Transporteinrichtung angeordneten Wassersprüheinrichtung bestehen. Mit Hilfe der Wassersprüheinrichtung können die Stäube gebunden und agglomeriert werden und auch die Dämpfe kondensiert werden.The agglomeration device can consist, for example, of a water spraying device arranged at the outlet of the transport device. With the help of the water spraying device, the dusts can be bound and agglomerated and also the vapors are condensed.

Alternativ besteht hinsichtlich der Stäube auch die Möglichkeit diese elektrostatisch abzuscheiden.Alternatively, with regard to the dusts, it is also possible to deposit them electrostatically.

Zwischen dem ersten und zweiten Kanalabschnitt der Transporteinrichtung ist stromabwärts und unweit des Ansaugstutzens der Absaugeinrichtung mindestens eine flexible Klappe als Trennmittel angeordnet, die den ersten Kanalabschnitt der Transporteinrichtung gegen Lufteintritt entgegen der Materialtransportrichtung verschließt. In Materialtransportrichtung kann das abgefräste Material die Klappe verschwenken, während ein Lufteintritt entgegen der Materialtransporteinrichtung verhindert wird. Der Unterdruck vor der Klappe verstärkt dabei die Abdichtung durch ein Ansaugen der Klappe auf das auf dem Fördergurt befindliche abgefräste Material.Between the first and second channel section of the transport device, at least one flexible flap, which closes the first channel section of the transport device against air ingress against the material transport direction, is arranged downstream of and near the suction nozzle of the suction device. In Materialtransportrichtung the milled material can pivot the flap, while an air inlet is prevented against the material transport device. The negative pressure in front of the flap thereby reinforces the seal by sucking the flap onto the milled material located on the conveyor belt.

Wird die Transporteinrichtung aus mehreren Transporteinrichtungen gebildet, ist das Trennmittel vorzugsweise an der ersten Transporteinrichtung vorgesehen.If the transport device is formed from a plurality of transport devices, the separating means is preferably provided on the first transport device.

Die Klappe kann mehrfach durch vertikal verlaufende Schlitze unterteilt sein, so dass sich die Klappe an die Kontur des auf dem Transportband transportierten Materials anpassen kann. Vorzugsweise sind mehrere Klappen, geteilt und/oder ungeteilt hintereinander zwischen dem ersten und zweiten Kanalabschnitt vorgesehen.The flap can be divided several times by vertically extending slots, so that the flap can adapt to the contour of the transported material on the conveyor belt. Preferably, a plurality of flaps, divided and / or undivided, are provided one behind the other between the first and second channel sections.

An den Seiten des mindestens einen Fördergurtes weist die Transporteinrichtung Haubenträger auf, die mit einer elastischen Lippe gegen den Fördergurt abgedichtet sind. Auf diese Weise bildet der Fördergurt mit der elastischen Lippe, dem Haubenträger und den Hauben einen lückenlos geschlossenen Kanalquerschnitt, der das transportierte abgefräste Material dicht umschließt. Alternativ kann der Kanalquerschnitt auch durch mehrere Haubenteile gebildet werden.On the sides of the at least one conveyor belt, the transport device on hood carrier, which are sealed with an elastic lip against the conveyor belt. In this way, the conveyor belt with the elastic lip, the hood carrier and the hoods forms a completely closed channel cross-section, which tightly encloses the transported milled material. Alternatively, the channel cross section can also be formed by a plurality of hood parts.

Nach dem Verfahren zum Entsorgen der während der Fräsbearbeitung mit Stäuben und Dämpfen verunreinigten Luft an einer Fräsmaschine zum Bearbeiten von Bodenoberflächen, bei der das von einer Fräswalze abgefräste Material über mindestens eine Transporteinrichtung entsorgt wird, sind die in Anspruch 14 angegebenen Schritte vorgesehen.According to the method for disposing of the air contaminated with dust and vapors during the milling process on a milling machine for processing ground surfaces, in which the milled from a milling drum material is disposed of via at least one transport means, the steps specified in claim 14 are provided.

Nach einer bevorzugten Ausführungsform sind folgende Schritte vorgesehen:

  • Absaugen der verunreinigten Luft in dem ersten Kanalabschnitt der Transporteinrichtung mit Hilfe eines Gebläses in Transportrichtung des abgefrästen Materials, und
  • Führen der verunreinigten Luft in einem Absaugkanal im wesentlichen parallel zu der Transportrichtung des abgefrästen Materials,
  • Einleiten der verunreinigten Luft in den zweiten Kanalabschnitt der Transporteinrichtung vor Abwurf des abgefrästen Materials.
According to a preferred embodiment, the following steps are provided:
  • Extracting the contaminated air in the first channel section of the transport device by means of a blower in the transport direction of the milled material, and
  • Guiding the contaminated air in a suction channel substantially parallel to the transport direction of the milled material,
  • Introducing the contaminated air in the second channel section of the transport device before dropping the milled material.

Im folgenden werden unter Bezugnahme auf die Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert:In the following, embodiments of the invention will be explained in more detail with reference to the drawings:

Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel einer erfindungsgemäßen Frontladerfräse,
Fig. 2
die an die Transporteinrichtung angeschlossene Absaugeinrichtung,
Fig. 3
einen Querschnitt durch die Transporteinrichtung im Bereich des ersten Kanalabschnittes,
Fig. 4
eine Ansicht auf das stirnseitige Ende des ersten Transportbandes mit angeschlossenem Absaugkanal,
Fig. 5
ein zweites Ausführungsbeispiel einer erfindungsgemäßen Heckladerfräse, und
Fig. 6
einen Querschnitt durch die Transporteinrichtung gemäß einem zweiten Ausführungsbeispiel einer Haube.
Show it:
Fig. 1
A first embodiment of a front loading router according to the invention,
Fig. 2
the suction device connected to the transport device,
Fig. 3
a cross section through the transport device in the region of the first channel section,
Fig. 4
a view of the front end of the first conveyor belt with attached suction channel,
Fig. 5
A second embodiment of a tailgate according to the invention, and
Fig. 6
a cross section through the transport device according to a second embodiment of a hood.

Eine Fräsmaschine 1 zum Bearbeiten von Oberflächen in der Ausführungsform einer Frontladerfräse ist in Fig. 1 gezeigt. Es versteht sich, dass die Erfindung auch auf andersartige Fräsmaschinen anwendbar ist, die mit mindestens einer Transporteinrichtung 14,18 versehen sind.A milling machine 1 for working surfaces in the embodiment of a front-end mill is shown in FIG. It is understood that the invention is also applicable to other types of milling machines, which are provided with at least one transport device 14,18.

Die Fräsmaschine 1 dient zum Abfräsen von Bodenoberflächen, insbesondere Fahrbahnen aus Asphalt, Beton o. dgl. Die Fräsmaschine 1 weist ein Fahrgestell mit beispielsweise vier aus Kettenlaufrädern gebildeten Fahrschiffen 4 auf, das den Maschinenrahmen 2 trägt. In dem Maschinenrahmen 2 ist eine Fräswalze 8 gelagert, die sich quer zur Fahrtrichtung erstreckt. Die Einstellung der Frästiefe erfolgt mit Hilfe der Höhenverstellung der Fahrschiffe 4. Die in Fig. 1 dargestellte Fräsmaschine 1 wird auch als Frontladerfräsmaschine bezeichnet, da sie das abgefräste Material in Fahrtrichtung nach vorne auf ein Transportfahrzeug 10 befördert. In Fahrtrichtung vor der Fräswalze 8 ist eine erste aus einem Transportband bestehende Transporteinrichtung 14 mit einem Fördergurt 15 in einem Schacht 9 des Maschinenrahmens 2 angeordnet, der unter einem Neigungswinkel in den Maschinenrahmen 2 verläuft. Die erste Transporteinrichtung 14 befördert das abgefräste Material 3 auf dem Fördergurt 15 zu einer zweiten aus einem Transportband bestehenden Transporteinrichtung 18 mit einem weiteren Fördergurt 19. Die zweite Transporteinrichtung 18 ist über einen verstellbaren Neigungswinkel höhenverstellbar und kann zusätzlich seitlich und beispielsweise ± 30° verschwenkt werden, so dass auch neben der Fahrspur der Frontladerfräsmaschine stehende Transportfahrzeuge 10 beladen werden können. Alternativ zu Transportbändern ist beispielsweise auch der Einsatz einer in einem Kanal angeordneten Förderschnecke möglich.The milling machine 1 is used for milling off ground surfaces, in particular roadways made of asphalt, concrete or the like. The milling machine 1 has a chassis with, for example, four traveling wheels 4 formed from chain wheels, which supports the machine frame 2. In the machine frame 2, a milling drum 8 is mounted, which extends transversely to the direction of travel. The milling depth is adjusted by means of the height adjustment of the vessels 4. The milling machine 1 shown in Fig. 1 is also referred to as a front loading milling machine, since it conveys the milled material in the direction of travel forward on a transport vehicle 10. In the direction of travel in front of the milling drum 8, a first conveying device 14 consisting of a conveyor belt with a conveyor belt 15 is arranged in a shaft 9 of the machine frame 2, which runs at an angle of inclination into the machine frame 2. The first transport device 14 conveys the milled material 3 on the conveyor belt 15 to a second transporting device 18 comprising a conveyor belt with a further conveyor belt 19. The second transport device 18 is height-adjustable via an adjustable angle of inclination and can additionally be pivoted laterally and, for example, ± 30 °, so that even standing next to the lane of the front loading milling machine stationary transport vehicles 10 can be loaded. As an alternative to conveyor belts, it is also possible, for example, to use a conveyor screw arranged in a channel.

Um einen möglichst vollständigen Transport des abgefrästen Materials zu erreichen, ist die Fräswalze 8 in der Regel von einem Walzenkasten 58 umgeben, bei dem die in Fahrtrichtung weisende Wand als Schild 52 mit einer Durchtrittsöffnung 56 für das abgefräste Material ausgebildet ist.In order to achieve the most complete transport of the milled material, the milling drum 8 is usually surrounded by a roller box 58, wherein the pointing in the direction of travel wall is formed as a shield 52 with a passage opening 56 for the milled material.

Die Fräswalze 8 ist mit wendelförmig angeordneten Meißelwerkzeugen versehen, die so angeordnet sind, dass das abgefräste Material zur Durchtrittsöffnung 56 in dem Schild 52 transportiert wird. An dem in Fahrtrichtung hinteren Ende des Walzenkastens 58 ist eine dicht mit der abgefrästen Bodenoberfläche abschließende Wand 60 des Walzenkastens 58 vorgesehen, die die gefräste Bodenoberfläche abzieht, so dass keine Bruchstücke des abgefrästen Materials auf der abgefrästen Bodenoberfläche verbleiben. Die Wand 60 wird mit ihrer Unterkante hydraulisch gegen die Bodenoberfläche angepresst, um eine möglichst gute Abdichtung zu erzielen.The milling drum 8 is provided with helically arranged chisel tools, which are arranged so that the milled material is transported to the passage opening 56 in the shield 52. At the rear end of the roller box 58 in the direction of travel, there is provided a wall 60 of the roller box 58, which closes off the milled bottom surface, and which removes the milled bottom surface so that no fragments of the milled material remain on the milled ground surface. The wall 60 is pressed with its lower edge hydraulically against the ground surface in order to achieve the best possible seal.

Am Maschinenrahmen 2 ist ein Bandschuh 50 als Bandschutz- und Stützeinrichtung in einer Führung höhenverstellbar befestigt. Der Bandschuh 50 nimmt das hintere Ende der ersten Transporteinrichtung 14 auf. Die Durchtrittsöffnung 56 des Walzenkastens 58 bildet eine erste Übergabestelle 5, an der das abgefräste Material von der Fräswalze 8 auf die erste Transporteinrichtung 14 übergeben wird.On the machine frame 2, a belt shoe 50 is fixed in height adjustable as a band protection and support device in a guide. The belt shoe 50 receives the rear end of the first conveyor 14. The passage opening 56 of the roller box 58 forms a first transfer point 5, at which the milled material is transferred from the milling drum 8 to the first transport device 14.

Der Fahrstand befindet sich bei dem Ausführungsbeispiel der Fig. 1 oberhalb der Fräswalze 8, kann aber wie bei Fräsmaschinen üblich auch im hinteren oder vorderen Bereich des Maschinenrahmens 2 angeordnet sein.The control station is in the embodiment of FIG. 1 above the milling drum 8, but can be arranged as usual in milling machines in the rear or front region of the machine frame 2.

Fig. 2 zeigt im Detail die erste Transporteinrichtung 14.FIG. 2 shows in detail the first transport device 14.

Die Transporteinrichtung 14 ist in einem vorzugsweise mittig angeordneten Schacht 9 des Maschinenrahmens 2 befestigt und kann leicht von dem Bandschuh 50 zu Wartungszwecken demontiert werden und durch den Schacht 9 hindurch ausgebaut werden.The transport device 14 is mounted in a preferably centrally located shaft 9 of the machine frame 2 and can be easily disassembled from the belt shoe 50 for maintenance purposes and removed through the shaft 9 therethrough.

Die Transporteinrichtung 14 mit dem Fördergurt 15 weist eine Haube 22 auf, die gemeinsam mit dem oberen Trum 15a des Fördergurtes 15 einen Kanalabschnitt 16a eines Kanals 16 bildet, der sich von dem Walzenkasten 56 bis zum Ende der zweiten Transporteinrichtung 18 erstreckt. Wie im einzelnen im Querschnitt der Fig. 3 entnehmbar ist, ist die Haube 22 der ersten Transporteinrichtung 14 mit Hilfe von Haubenträgern 44 an dem Rahmen der ersten Transporteinrichtung 14 befestigt. Elastische Lippen 46 sind an den Haubenträgern 44 beidseitig des Transportbandes befestigt und berühren den oberen Trum 15a des Fördergurtes 15 im Randbereich über die gesamte Länge des oberen Trums 15a.The transporting device 14 with the conveyor belt 15 has a hood 22 which, together with the upper run 15a of the conveyor belt 15, forms a channel section 16a of a channel 16 which extends from the roller box 56 to the end of the second transport device 18. As can be seen in detail in the cross section of Fig. 3, the hood 22 of the first transport means 14 by means of hood supports 44 is attached to the frame of the first transport means 14. Elastic lips 46 are on the hood brackets 44 on both sides of the conveyor belt attached and touch the upper run 15a of the conveyor belt 15 in the edge region over the entire length of the upper run 15a.

In gleicher Weise ist die zweite Transporteinrichtung 18 mit einer Haube 26 versehen, die ebenfalls über Dichtlippen 46 gegen den oberen Trum des Förderbandes 19 abgedichtet ist und an entsprechenden Haubenträgern 44 montiert ist. Auf diese Weise ist der Kanal 16 staub- und gasdicht gegenüber der Umgebung abgedichtet.In the same way, the second transport device 18 is provided with a hood 26, which is also sealed by sealing lips 46 against the upper run of the conveyor belt 19 and is mounted on corresponding hood carriers 44. In this way, the channel 16 is sealed dust and gas tight against the environment.

Im oberen Bereich der Haube 22 in der Nähe des Abwurfendes aber noch mit Abstand vor dem Abwurfende, weist die Haube 22 der ersten Transporteinrichtung 14 einen im wesentlichen vertikal nach oben abstehenden Stutzen 23 auf, an den ein Absaugkanal 24 anschließbar ist. Der Maschinenrahmen 2 weist hierzu in seiner Mitte ein im wesentlichen vertikalen Schacht 25 auf, durch den der Absaugkanal 24 nach oben aus dem Maschinenrahmen 2 austreten kann. In einem ersten Abschnitt des Absaugkanals 24 ist ein Axiallüfter 28 in den Absaugkanal 24 integriert. Dies hat den Vorteil, dass der Platzbedarf für ein Gebläse minimiert ist. Der Axiallüfter 28 ermöglicht eine hohe Luftförderleistung und erzeugt demzufolge ein entsprechend hohen Unterdruck in dem ersten Kanalabschnitt 16a und in dem die Fräswalze 8 umgebenden Walzenkasten 56. Die beim Fräsvorgang entstehenden Stäube und Dämpfe werden daher zuverlässig und mit hoher Effizienz über den Absaugkanal 24 abgesaugt. Im Bereich der ersten Übergabestelle 5, d.h. an dem unteren Ende der Haube 22 und an der Durchtrittsöffnung 56 des Walzenkastens 58 bzw. des Bandschuhs 50 können flexible Gummimatten die Übergabestelle 5 umfangsmäßig abdichten. Kleinere Undichtigkeiten des Walzenkastens 56 bzw. zwischen dem Kanal 16 und dem Walzenkasten 56 sind unerheblich, da durch den Unterdruck keine verunreinigte Luft austreten kann, sondern allenfalls Luft aus der Umgebung angesaugt wird. Am oberen Ende der Haube 22 sind, wie am besten aus Fig. 4 ersichtlich, als Trennmittel zwischen dem ersten und dem zweiten Kanalabschnitt 16a,16b flexible Klappen 36 vorgesehen, die einerseits das abgefräste Material 3 auf dem Fördergurt 15 hindurchlassen und andererseits eine Luftströmung entgegen der Transportrichtung der ersten Transporteinrichtung 14 verhindern. Falls nur ein einziges Transportband vorgesehen ist, befinden sich die Trennmittel in der Mitte der einzigen Transporteinrichtung.In the upper region of the hood 22 in the vicinity of the discharge end but still at a distance from the discharge end, the hood 22 of the first transport device 14 has a substantially vertically upwardly projecting nozzle 23, to which a suction channel 24 can be connected. For this purpose, the machine frame 2 has in its center a substantially vertical shaft 25, through which the suction channel 24 can emerge upwards out of the machine frame 2. In a first section of the suction channel 24, an axial fan 28 is integrated into the suction channel 24. This has the advantage that the space required for a fan is minimized. The axial fan 28 enables a high air flow rate and thus generates a correspondingly high negative pressure in the first channel section 16a and in the drum box 56 surrounding the milling drum 8. The dusts and vapors produced during the milling process are therefore sucked off reliably via the suction channel 24 with high efficiency. In the region of the first transfer point 5, ie at the lower end of the hood 22 and at the passage opening 56 of the roller box 58 and the belt shoe 50 flexible rubber mats can seal the transfer point 5 circumferentially. Smaller leaks of the roller box 56 and between the channel 16 and the roller box 56 are irrelevant, since no contaminated air can escape through the negative pressure, but at most air is sucked from the environment. At the upper end of the hood 22, as best seen in Fig. 4, as a separating means between the first and the second channel portion 16a, 16b flexible flaps 36 are provided which on the one hand pass the milled material 3 on the conveyor belt 15 and on the other hand, an air flow prevent the transport direction of the first transport device 14. If only a single conveyor belt is provided, the release means are in the middle of the single transport device.

Um den ersten Kanalabschnitt 16a an seinem oberen Ende möglichst gut abzudichten, sind die Klappen 36 mit Schlitzen versehen. Vorzugsweise sind mehrere Klappen 36 hintereinander angeordnet, um eine verbesserte Luftabdichtung zwischen den Kanalabschnitten 16a,16b zu erreichen.In order to seal the first channel section 16a as best as possible at its upper end, the flaps 36 are provided with slots. Preferably, a plurality of flaps 36 are arranged one behind the other to achieve an improved air seal between the channel sections 16a, 16b.

Der Fördergurt 15 wird, wie am besten aus Fig. 3 ersichtlich ist, über Stützrollen 62,64 geführt, wobei der obere Trum 15a eine im wesentlichen U-förmige Rinne bildet, indem die Stützrollen 64 entsprechend geneigt sind. Die untere Stützrolle 62 unterstützt den unteren Trum 15b des Fördergurtes 15. Wie aus den Fign. 3 und 4 ersichtlich ist, befinden sich auf der Oberfläche des Fördergurtes 15 Stege 17, die die Mitnahme des abgefrästen Materials 3 auf dem Fördergurt 15 verbessern.The conveyor belt 15 is, as best seen in Fig. 3, guided over support rollers 62,64, wherein the upper run 15a forms a substantially U-shaped groove by the support rollers 64 are inclined accordingly. The lower support roller 62 supports the lower run 15b of the conveyor belt 15. As shown in FIGS. 3 and 4 can be seen, there are 15 webs 17 on the surface of the conveyor belt, which improve the entrainment of the milled material 3 on the conveyor belt 15.

An dem oberen Ende der Transporteinrichtung 14 wird das abgefräste Material 3 an der zweiten Übergabestelle 7 in einen Aufnahmetrichter 35 der zweiten Transporteinrichtung 18 übergeben, wodurch das abgefräste Material 3 über den Fördergurt 19 bis zum Abwurfende gefördert wird und auf das Transportfahrzeug 10 entsorgt wird.At the upper end of the transport device 14, the milled material 3 is transferred at the second transfer point 7 into a receiving hopper 35 of the second transport device 18, whereby the milled material 3 is conveyed via the conveyor belt 19 to the discharge end and disposed of on the transport vehicle 10.

Die Übergangsstelle an der Übergabestelle 7 ist von aus flexiblen Matten 30 bestehenden Abdichtmitteln umschlossen, so dass die erste Transporteinrichtung 14 und die zweite Transporteinrichtung 18 einen in Materialtransportrichtung durchgängigen umfangsmäßig abgedichteten Kanal 16 bilden.The transition point at the transfer point 7 is enclosed by sealing means consisting of flexible mats 30, so that the first transporting device 14 and the second transporting device 18 form a circumferentially sealed channel 16, which is continuous in the material transporting direction.

Der Absaugkanal 24 ist mit seinem anderen Ende an der Haube 26 der zweiten Transporteinrichtung 18 angeschlossen, wobei der Anschlussstutzen 27 vorzugsweise unter einem flachen Winkel in den Kanalabschnitt 16b eintritt, um bei der hohen Strömungsgeschwindigkeit der abgesaugten, verunreinigten Luft eine Injektionswirkung in dem Kanalabschnitt 16b zu erzeugen, wodurch auch der untere Teil des Kanalabschnitts 16b besaugt wird. Um eine Luftströmung zuzulassen, können an geeigneten Stellen im Bereich der zweiten Übergabestelle 7, z.B. an den Abdichtmitteln 30 Lücken zum Ansaugen von Luft freigelassen werden. Am oberen Ende der zweiten Transporteinrichtung 18 wird das abgefräste Material abgeworfen, wobei mit dem abgefrästen Material 6 die abgesaugte staub- und dampfbeladene Luft gemeinsam mit dem abgefrästen Material 3 entsorgt wird. Vorzugsweise ist am Abwurfende der zweiten Transporteinrichtung eine Agglomerationseinrichtung 34 vorgesehen, mit deren Hilfe Stäube verbunden werden können und ggf. vorhandene Dämpfe kondensiert werden können. Die Agglomerationseinrichtung 34 kann aus einer Wassersprüheinrichtung bestehen, wobei beispielsweise mit einem Sprühnebel die Stäube und die Dämpfe abgeschieden werden. Die Agglomerationseinrichtung 34 ist vorzugsweise außerhalb des Kanalabschnitts 16b am Abwurfende der zweiten Transporteinrichtung 18 angeordnet, könnte aber auch innerhalb des zweiten Kanalabschnitts 16b angeordnet sein.The suction channel 24 is connected at its other end to the hood 26 of the second transport device 18, wherein the connecting piece 27 preferably enters the channel portion 16b at a shallow angle to inject in the channel portion 16b at the high flow rate of the extracted polluted air generate, whereby the lower part of the channel portion 16 b is sucked. In order to allow air flow, gaps for sucking in air can be left free at suitable points in the area of the second transfer point 7, for example at the sealing means 30. At the upper end of the second transport device 18, the milled material is dropped, with the milled material 6, the extracted dust and vapor-laden air is disposed of together with the milled material 3. Preferably, at the discharge end the second transport means an agglomeration device 34 is provided, with the aid of which dusts can be connected and possibly existing vapors can be condensed. The agglomeration device 34 may consist of a water spray device, wherein the dust and vapors are deposited, for example, with a spray. The agglomeration device 34 is preferably arranged outside the channel section 16b at the discharge end of the second transport device 18, but could also be arranged within the second channel section 16b.

Die Fräsmaschine 1 wäre allerdings auch ohne Agglomerationseinrichtung 34 einsetzbar, da die Stäube und Dämpfe sehr weit entfernt vom Fahrstand entsorgt werden, so dass die Arbeitsbedingungen auf dem Fahrstand und im Arbeitsbereich um die Maschine herum auch ohne Agglomerationseinrichtung 34 erheblich verbessert werden.However, the milling machine 1 would also be usable without agglomeration device 34, since the dusts and vapors are disposed very far away from the control station, so that the working conditions on the control station and in the work area around the machine around even without agglomeration device 34 are significantly improved.

Fig. 5 zeigt ein zweites Ausführungsbeispiel der Erfindung an dem Beispiel einer Heckladerfräse 11 mit nur einer einzigen Transporteinrichtung 14. Bei einer Heckladerfräse befindet sich die Durchtrittsöffnung für das abgefräste Material 3 in der entgegen der Fahrtrichtung weisenden, als Abstreifer ausgebildeten Wand 61 des Walzenkastens 58. Das von der Fräswalze 8 abgefräste Material 3 wird dabei direkt an dieser Übergabestelle 5 auf das Transportband der einzigen Transporteinrichtung 14 übertragen, das am hinteren Ende der Heckladerfräse 11 angeordnet ist. Der Fördergurt 15 der Transporteinrichtung 14 befördert das abgefräste Material auf ein Transportfahrzeug 10. Die Transporteinrichtung 14 ist wie die Transporteinrichtung 18 des Ausführungsbeispiels der Fig. 1 sowohl in der Neigung als auch seitlich verschwenkbar.Fig. 5 shows a second embodiment of the invention on the example of a rear loading router 11 with only a single transport device 14. In a rear loading router is the passage opening for the milled material 3 in the counter to the direction of travel, designed as a scraper wall 61 of the roller box 58th The milled from the milling drum 8 material 3 is transferred directly to this transfer point 5 on the conveyor belt of the single transport device 14, which is arranged at the rear end of the rear loading router 11. The conveyor belt 15 of the transport device 14 conveys the milled material onto a transport vehicle 10. The transport device 14, like the transport device 18 of the exemplary embodiment of FIG. 1, can be pivoted both in the inclination and laterally.

Wie aus Fig. 5 ersichtlich, ist der Anschlussstutzen 23 direkt an einem oberen Haubenteil 22a der Transporteinrichtung 14 am unteren Ende angeschlossen. Als Trennmittel zwischen den Kanalabschnitten 16a,16b dienen, wie bei dem ersten Ausführungsbeispiel, flexible Klappen 36, die wie grundsätzlich aus Fig. 4 ersichtlich, gegen den oberen Trum 15a des Fördergurtes 15 anliegen. Vorzugsweise sind mehrere Klappen hintereinander angeordnet, die einen ungehinderten Transport des abgefrästen Materials 3 von dem ersten Kanalabschnitt 16a in den zweiten Kanalabschnitt 16b ermöglichen, dagegen eine Luftströmung zwischen den beiden Kanalabschnitten 16a,16b weitestgehend verhindert. Die über den Absaugkanal 24 abgesaugte verunreinigte Luft tritt am oberen Ende der Transporteinrichtung 14 wieder in den Kanal 16 ein, und zwar in den Kanalabschnitt 16b in der Nähe des Abwurfendes der Transporteinrichtung 14.As can be seen from FIG. 5, the connecting piece 23 is connected directly to an upper hood part 22a of the transport device 14 at the lower end. As separating means between the channel sections 16a, 16b are used, as in the first embodiment, flexible flaps 36, as shown in FIG. 4, abut against the upper run 15a of the conveyor belt 15. Preferably, a plurality of flaps are arranged one behind the other, which ensures unimpeded transport of the milled material 3 from the first channel section 16a into the second channel section Allow 16 b, however, largely prevents air flow between the two channel sections 16 a, 16 b. The contaminated air extracted via the suction channel 24 re-enters the channel 16 at the upper end of the conveyor 14, namely into the channel section 16b in the vicinity of the discharge end of the transport device 14.

Fig. 6 zeigt ein zweites Ausführungsbeispiel einer Haube 22, die aus zwei Haubenteilen 22a,22b gebildet ist.Fig. 6 shows a second embodiment of a hood 22, which is formed from two hood parts 22a, 22b.

Im Vergleich zu dem Ausführungsbeispiel der Fig. 3 können die Dichtlippen 46 entfallen, wobei dann der Kanalquerschnitt von den sich ergänzenden Haubenteilen 22a und 22b definiert wird.Compared to the embodiment of Fig. 3, the sealing lips 46 can be omitted, in which case the channel cross-section is defined by the complementary hood parts 22a and 22b.

Claims (18)

  1. Automotive milling machine (1,11) for machining ground surfaces, comprising
    - an engine frame (2),
    - a milling drum (8) supported on the engine frame (2),
    - at least one conveying device (14,18) which is arranged on the engine frame (2) and takes over the milled-off material (3) from the milling drum (8) at a transfer location (5), and
    - a suction device (20) for the air that is polluted with dusts and fumes,
    - the at least one conveying device (14,18) for the milled-off material (3) being enclosed by a duct (16),

    characterized in
    - that the duct (16) enclosing the conveying device (14,18) is divided into two duct sections (16a,16b),
    - that the suction device (20) is connected to the first duct section (16a) of the duct (16) downstream from the first transfer location (5) for the milled-off material (3),
    - that the suction device (20) sucks off the air that has been polluted during milling inside the first duct section (16a) substantially in the direction in which the material is conveyed, and
    - that the second duct section (16b) is separated from the first duct section (16a) by means of separating means (36) for blocking up an airflow without a transport of the milled-off material being hindered.
  2. Milling machine according to claim 1, characterized in that the suction device (20) comprises a suction duct (24) connected to the first duct section (16a).
  3. Milling machine according to claim 2, characterized in that the suction duct (24) comprises an axial fan (28) integrated into the suction duct (24).
  4. Milling machine according to one of claims 1 to 3, characterized in that the downstream end of the suction duct (24) opens into the second duct section (16b).
  5. Milling machine according to one of claims 1 to 4, characterized in that the suction device (20) disposes of the polluted air where dust develops anyway as a consequence of the discharge from the conveying device (14,18).
  6. Milling machine according to one of claims 1 to 5, characterized in that the duct (16) is sealed off against the at least one conveying device (14,18).
  7. Milling machine according to one of claims 1 to 6, characterized in that the at least one conveying device (14,18) consists of a band conveyor with a conveyor belt (15,19) and that the duct (16) is formed of hoods (22,22a,22b,26) sealing against the conveyor belt (15,19) or against the housing of the at least one conveying device (14,18).
  8. Milling machine according to one of claims 1 to 7, characterized in that a second conveying device (18) takes over the milled-off material at the end of the first conveying device (14) at a transfer location (7), and that the transfer location (7) between the first and the second conveying device (14,18) is circumferentially sealed by flexible sealing means (30) connected to the conveying devices (14,18) so that a continuous duct is formed over both conveying devices (14,18).
  9. Milling machine according to one of claims 3 to 8, characterized in that the suction duct (24) opens into the second duct section (16b) of the conveying device (14,18) at an acute angle.
  10. Milling machine according to one of claims 1 to 9, characterized in that a means (34) for agglomerating the dusts and/or for condensing the fumes is arranged behind the junction of the suction duct (24) and the second duct section (16b) of the at least one conveying device (14,18).
  11. Milling machine according to claim 10, characterized in that the means (34) consists of a water spraying means arranged at the discharge end of the at least one conveying device (14,18).
  12. Milling machine according to one of claims 1 to 11, characterized in that the separating means (36) between the first duct section (16a) and the second duct section (16b) of the at least one conveying device (14,18) consist of at least one flexible flap extending over the entire open cross section of the duct section (16a).
  13. Milling machine according to one of claims 7 to 12, characterized in that hood supports (44) for the hoods (22,26) are mounted to the sides of a band conveyor, said hood supports being sealed against the conveyor belt (15,19) of the band conveyor by an elastic lip (46).
  14. Method for the disposal of dusts and fumes produced during milling at a milling machine for machining ground surfaces, where the material (3) milled off by a milling drum (8) is transferred onto a conveying device (14) at a transfer location (5) and is disposed of via at least one conveying device (14,18), the milled-off material (3) being surrounded by a duct (16) on the conveying device (14,18),
    characterized by
    - forming a duct (16) divided in the direction of transport, with a first duct section (16a) and a second duct section (16b) connected with the first duct section (16a),
    - sucking off the polluted air in the first duct section (16a) downstream from the transfer location (5) for the milled-off material, the polluted air being sucked off in the first duct section (16a) of the conveying device (14,18) in the direction in which the milled-off material is conveyed, wherein the duct (16) is divided by separating means (36) and the milled-off material (3) can be conveyed from the first duct section (16a) into the second duct section (16b) in an unhindered manner, whereas an airflow between the first duct section (16a) and the second duct section (16b) is prevented.
  15. Method according to claim 14, characterized in that before the milled-off material (3) is thrown off, the polluted air is introduced into the second duct section (16b) of the conveying device (18) such that an injection effect is achieved.
  16. Method according to one of claims 14 or 15, characterized in that the dust and the fumes in the polluted air are segregated at the end of the conveying device (14,18) by means of a means (34) for agglomerating the dusts and/or for condensing the fumes before or during the discharge of the machined material and are disposed of together with the milled-off material (3).
  17. Method according to one of claims 14 to 16, characterized in that by sucking off the dust- and fume-loaded air at the conveying device (14) via a suction duct (24) connecting the first duct section (16a) formed at the conveying device (14) with the second duct section (16b) of the duct (16) formed at the conveying device (18), an airflow in the direction in which the milled-off material (3) is conveyed being produced in both duct sections (16a,16b).
  18. Method according to one of claims 14 to 17, characterized in that an axial fan (28) integrated in the suction duct (24) is used for sucking off the polluted air.
EP03727433A 2002-05-28 2003-05-06 Suction device and suction method for the disposal of dust in milling machines Expired - Lifetime EP1507925B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10223819A DE10223819B4 (en) 2002-05-28 2002-05-28 Milling machine for processing soil surfaces, and method for disposing of generated during milling dust and vapors on a milling machine
DE10223819 2002-05-28
PCT/EP2003/004691 WO2003100172A1 (en) 2002-05-28 2003-05-06 Suction device and suction method for the disposal of dust in milling machines

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EP1507925A1 EP1507925A1 (en) 2005-02-23
EP1507925B1 true EP1507925B1 (en) 2006-02-01

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US (2) US7175364B2 (en)
EP (1) EP1507925B1 (en)
AT (1) ATE317034T1 (en)
DE (2) DE10223819B4 (en)
WO (1) WO2003100172A1 (en)

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ATE317034T1 (en) 2006-02-15
DE10223819B4 (en) 2005-05-12
US7422390B2 (en) 2008-09-09
DE50302342D1 (en) 2006-04-13
WO2003100172A1 (en) 2003-12-04
US7175364B2 (en) 2007-02-13
EP1507925A1 (en) 2005-02-23
US20070122236A1 (en) 2007-05-31
US20050179308A1 (en) 2005-08-18
DE10223819A1 (en) 2003-12-24

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