EP3037585B1 - Milling device for removing material applied to traffic areas and method - Google Patents

Description

The invention relates to a milling device for removing applied on paved traffic surfaces order. The invention further relates to a method for operating such a milling device.

For applied on paved traffic surfaces order is in particular applied road markings or applied tire abrasion of airplanes on a runway. A variety of other applied on paved traffic surfaces order is conceivable, for example, in an accident on the traffic surface arrived cargo, which is an order, such as leaked paint.

When removing applied on paved roads, job, especially in demarcation, often not the desired results are achieved and / or the paved road surface is very heavily used.

Application that is applied to paved roads in connection with road markings, consists in particular of adhesive tape, spray plastic, cold plastic, thermoplastic, paint or epoxy resin materials.

Currently available on the market demarking machines (see for example demarcation machine) Peel Jet "of Weigel Hochdrucktechnik GmbH & Co. KG, D-97638 Mellrichstadt, www.peelj et.de ) have a suction hood, within which a rotatable spray bar with spray nozzles is arranged. With a rotating spray bar, water is supplied under high pressure through the spray bar to the spray nozzles and discharged in the direction of the road. The suction hood has sealing brushes on its side facing the road surface, so that the unit formed by the suction hood and sealing brushes rests firmly on the roadway. The exhaust hood ensures that the water does not escape and serves as a protective device against solid particles and road dirt, which are released by the demarcation, whirled up and then thrown through the air. Due to the sealing between the extraction hood and the roadway, the jet water accumulates with slurries and solids. The driven spray bar rotates in the liquid bath, so that the high-pressure water jet does not strike the surface to be demarcated, but first has to penetrate the backwater. This significantly reduces the power of the water jet and thus the demarcation result. The liquid in the suction hood and the solids can be sucked off only after a residence time, since a certain level must be reached within the hood.

The suction is done with vacuum, d. H. low air volume at high vacuum, about 60% vacuum. By pushing on the liquid-filled suction hood, the sealing brushes re-wipe the sludge back into the previously demarcated ceiling surface. Therefore, before a new marking can be made, the demarcated surface must first be dried and, if necessary, cleaned again in order to ensure the prescribed basis of adhesion for the marking.

The US Pat. No. 5,991,968 discloses a milling device having a rotatable spray bar disposed in a housing for dispensing a pressurized fluid, wherein two flexible sealing elements resting on the roadway enclose the housing.

Furthermore, from the US 2003/0066158 A1 a milling device, in particular for use within a building, known, which is formed according to the features of the preamble of claim 1. The publication discloses a milling device which is movable in a working position relative to the traffic surface, with an outer hood-shaped housing and an enclosed by this inner hood-shaped housing, disposed within the inner housing, rotatable by means of a drive about a rotation axis spray bar with spray nozzles for passing of highly pressurized liquid, as well as with an outer housing connected to the suction nozzle, which is connectable to a suction device, wherein, based on the working position of the milling device, the two housing are open to the traffic area, the spray bar with the spray nozzles to a Traffic surface upright axis is rotatable, as well as when milling from the spray nozzles output liquid and milled order is sucked through an intermediate space formed between the housings and through the suction nozzle.

Furthermore, from the EP 2 354 315 A1 a milling device with a arranged in an inner housing, about a rotation axis rotatable spray bar and a the outer housing surrounding the outer housing, at least on the inner housing on the roadway resting, flexible sealing elements are arranged.

From the DE 83 24 163 U1 a milling device for removing applied on paved traffic surfaces job is known. This device has a milling tool arranged within a hood-shaped housing, which is designed as a roller and, during operation, rotates about an axis arranged parallel to the traffic surface. Upon rotation of the milling tool, this thus acts directly on the traffic surface mechanically. This milling device thus operates according to another mode of action, without the use of high-pressure liquid.

Similar milling devices with milling tools, which act directly on the traffic surface, are in the US 4,405,177 and the EP 0 948 680 B1 described.

In these directly mechanically acting on the traffic surface milling devices additional sweeping or suction devices for conveying away from the traffic surface order are required.

The object of the present invention is to provide a milling device for removing applied on paved traffic surfaces order, with the above-discussed disadvantages are avoided and in particular a safe operation is ensured at high efficiency. The object of the invention is also to provide an advantageous method for operating the milling device.

The object is achieved by a milling device according to the features of patent claim 1 and a method for operating the milling device according to the features of patent claim 14.

The milling device according to the invention serves to remove applied on paved traffic surfaces order. These are in particular applied road markings or applied tire abrasion of aircraft on a runway. In a working position, the milling device is movable relative to the traffic area. The milling device according to the invention comprises an outer hood-shaped housing and an inner, hood-shaped housing, which is arranged inside the inner housing, and which can be rotated by means of a drive about a rotation axis spray bar with spray nozzles for passing fluid under high pressure, and one with the outer Housing connected suction, which is connectable to a suction on. In the working position of the milling device, the two housings are open to the traffic area and it rotates the spray bar with the spray nozzles to an upright to the traffic surface axis. When milling out of the spray nozzles output liquid and milled order are sucked through a space formed between the housings and through the suction nozzle. The intermediate space formed between the housings is subdivided into intermediate space regions such that liquid dispensed from the spray nozzles and milled application flows from the intermediate space regions into the suction nozzle.

It is essential in the milling device according to the invention thus that two hood-shaped housing are provided, wherein the outer hood-shaped housing has the function of a suction bell. Of the in the working position of the traffic area facing side of the two hood-shaped housing is in the space between the inner hood-shaped housing and the outer, hood-shaped housing, thus between the inner, hood-shaped housing and the suction bell, ambient air from the area outside the outer housing in sucked in the space between the two housings. By means of this sucked in ambient air, the liquid dispensed from the spray nozzles, in particular water dispensed from the spray nozzles, and the order removed by the liquid from the traffic surface, are mixed with the ambient air and this mixture is passed through the suction nozzle from the milling device aspirated. Due to the suction through the gap, the milling device can generate a strong air velocity at low negative pressure, for example at 20% vacuum, and high air volume. The generated flow rate absorbs even the smallest liquid particles. Due to the described suction between the inner housing and the outer housing and the distance of the outer housing to the traffic surface accumulates within the outer housing no liquid. Since there is a gap between the suction and the traffic area, milled material, liquid / water and removed application / dissolved marking residues are transported away by an air curtain directly into the extraction system after loosening / spraying in a continuous suction process. The high pressure fluid jet / water jet hits the job to be removed directly, providing a very high level of performance in removing the applied job or, in the case of a pavement marking, a high demarking performance. This performance is significantly higher than with a conventional high-pressure mill with the same pump capacity. Due to the high airspeed, the traffic area after the removal of the applied job is almost dry, and it comes to a possibly minimal Schlinden, which then immediately a new order can be applied to the traffic area. The gap areas serve to guide the suction air, liquid and milled order differently, in order to achieve optimal suction results.

In this aspect, it is provided in an advantageous development of the invention that the intermediate space formed between the housings is divided by partitions in the intermediate space areas. In particular, two partitions are provided. Through this is or are a central suction, which is connected to a arranged within the suction nozzle guide tube, and two lateral suction, which open directly into the suction formed.

According to a preferred development of the milling device according to the invention, it is provided that it has a chassis and rolling means mounted therein, in particular wheels, wherein the rolling means in the working position of the milling device contact the traffic area. By means of this rolling means it is ensured that the two housings maintain a constant distance to the traffic area in the working position of the milling device. The rolling means can be designed differently, provided that the aforementioned purpose is met. Rolling means can certainly be designed as circulating chains. When using wheels is especially provided that they are steerable.

In principle, it would also be sufficient, via auxiliary means, for example a motor vehicle in which the milling device is mounted, to position the milling device in its working position at a small distance from the traffic surface, without thus bringing about contact of the milling device and the traffic surface via said rolling means.

Particularly good work results can be achieved with the milling device when, in the working position of the milling device, the opening directed towards the traffic surface opening of the outer housing and / or inner housing forms a flat opening surface. Thus, the traffic surface facing a flat opening surface of the outer housing or inner housing. Preferably, the planar opening surface of the outer housing and / or inner housing is arranged parallel to the traffic surface. This results in particular from the aspect of the arrangement of the outer housing to the traffic area a constant distance from the outer housing to the traffic surface, considered over the entire circumferential boundary contour of the flat opening surface of the outer housing. The same applies mutatis mutandis to the inner housing with the advantages described above.

Preferably, in the working position of the milling device, the planar opening surface of the outer housing is arranged at a distance of 10 mm to 60 mm, preferably 20 mm to 30 mm, in particular 25 mm to the traffic area. It is thus a relatively small sized gap between the outer housing and the traffic area, by the ambient air into the interior of the outer housing, specifically the gap between the inner housing and the outer housing is sucked in. This causes high flow velocities of the suction air in this area, whereby the liquid discharged from the spray nozzles and the remote application are optimally conveyed by means of the high-velocity air flow.

It when the flat opening surface of the inner housing is arranged at a greater distance from the traffic surface than the flat opening surface of the outer housing is particularly advantageous. The flat opening surface of the outer housing is thus positioned closer to the traffic surface than the flat surface of the inner housing. Due to this greater distance between the inner housing and the traffic area, the liquid dispensed from the spray nozzles and also the remote application can be supplied in a streamlined manner to the air sucked through the outer housing.

According to a preferred embodiment of the invention it is provided that outside of the outer housing surrounding the outer housing skirt is arranged. This apron contacted in the working position of the milling device, the traffic area circumferentially. By this apron is thus additionally prevented that particles that arise when removing the contract from the traffic area, endanger standing next to the milling equipment people. In principle, however, this circumferential skirt is not required because milled material does not reach the area outside the outer housing due to the air flowing radially outward to radially inward, which flows in as ambient air below the outer housing. Such milled material is entrained inwardly by the suction air.

When forming the milling device with the circumferential skirt this is formed in particular on the side facing away from the traffic surface between the skirt and the outer housing with an opening for suction. Since the skirt seals to the traffic area, suction air enters through this opening into the gap between the outer housing and the skirt and from there into the space between the outer housing and the inner housing.

In particular, it is provided that the apron is flexible. It preferably consists of flexible skirt segments. The apron or the skirt segments are, in the working position of the milling device, arranged upright to the traffic area. The use of Schürz segments is therefore advantageous because the apron should seal to the traffic area and with slight unevenness in the traffic area the skirt segments these bumps under the aspect of sealing can better follow than a one-piece apron.

The opening for suction air between the skirt and the outer housing is preferably formed as a circumferential annular opening.

According to a preferred embodiment, it is provided that the intermediate space formed between the housings is formed as an annular space. As a result, quite homogeneous flow conditions can be achieved during the passage of the suction air through the intermediate space.

Under the aspect of optimum flow conditions in the region of the two housings, it is considered to be particularly advantageous if the planar opening area of the inner housing and / or outer housing is circular, wherein an axis of rotation of the spray bar extends through the center of the circle. This design results in a further optimized flow due to the symmetrical allocation of the circular opening surfaces and the axis of rotation of the spray bar.

It is considered to be particularly advantageous if the milling device has a frame which is provided with a receptacle for mounting, in particular pivotable mounting of the milling device in a motor vehicle. The milling device is in particular a special accessory of a motor vehicle, in particular a heavy goods vehicle, which is used for road maintenance. If this motor vehicle has a suction device and a pump unit for high-pressure fluid, this motor vehicle provided with the milling device can be excellently used for removing traffic surfaces mounted on paved vehicles Order to be used. It is only necessary to connect the suction device of the motor vehicle to the suction nozzle of the milling device, further to connect the pump unit of the motor vehicle for high-pressure fluid via a hose connection with a liquid supply to the rotatable spray bar, also to connect a drive of the milling device for the spray bar to the motor vehicle, For example, to connect oil connections of the motor vehicle with a hydraulic drive of the milling device for the spray bar. By controlling the components of the milling device by the leader of the motor vehicle, the spray bars are rotated by means of said components, liquid, specifically water, supplied to the spray nozzles and the suction device of the motor vehicle is actuated, so that suction air is sucked through the suction nozzle of the milling device.

In view of the preferably provided pivotable mounting of the milling device in the motor vehicle, the milling device assumes a position in a non-working position, in which it is folded substantially upwards, by means of which the motor vehicle can be driven in a conventional manner. If the milling device is pivoted downwards in its substantially horizontal position, it assumes the working position in which the motor vehicle and thus the milling device can be activated to remove the application applied to the traffic surface. The travel speed of the motor vehicle is relatively slow. The motor vehicle travels at such a speed that optimal removal of the job applied to the traffic surface is ensured.

The invention including its developments thus proposes a milling device, in which no seal on the outer housing and / or on the inner housing to the traffic area is needed. It does not form a jammed liquid with a milled order between the rotatable spray bar and the traffic area.

In the method according to the invention for operating the milling device, it is provided that the milling device can be removed at a speed for removing the job the spray bar from 2000 to 3000 U / min, in particular 2500 to 3000 U / min, a pressure of the liquid, in particular water, from 150 to 2500 bar, in particular 1500 to 2500 bar, and a negative pressure air quantity passing through the suction port of the Fräseinrichtung outlet, from 7500 to 15000 m ³ / h, in particular 12000 to 15000 m ³ / h, operated.

Further features of the invention are illustrated in the description of the figures and the figures themselves, wherein it is noted that all individual features and all combinations of individual features are essential to the invention.

In the figures, the invention is illustrated by means of an embodiment, without being limited thereto.

Fig. 1

in einer stark vereinfachten Darstellung eine Seitenansicht eines Lastkraftfahrzeuges, das mit der erfindungsgemäßen Fräseinrichtung versehen ist, veranschaulicht in der Arbeitsstellung der Fräseinrichtung,

Fig. 2

die Anordnung gemäß Fig. 1, veranschaulicht für den Zustand der NichtArbeitsstellung der Fräseinrichtung,

Fig. 3

eine Seitenansicht der Fräseinrichtung, veranschaulicht im Vollschnitt, für die Arbeitsstellung der auf eine Verkehrsfläche aufgesetzten Fräseinrichtung,

Fig. 4

eine Ansicht der in Fig. 3 gezeigten Fräseinrichtung, von unten gesehen, mit zusätzlich veranschaulichtem Lagerrahmen zur Lagerung der Fräseinrichtung im Lastkraftwagen,

Fig. 5

eine Draufsicht eines Teilbereiches der Fräseinrichtung, im Vollschnitt.

It shows:

Fig. 1

in a highly simplified representation of a side view of a truck, which is provided with the milling device according to the invention, illustrated in the working position of the milling device,

Fig. 2

the arrangement according to Fig. 1 , illustrated for the state of non-working position of the milling device,

Fig. 3

a side view of the milling device, illustrated in full section, for the working position of the mounted on a traffic surface milling device,

Fig. 4

a view of in Fig. 3 shown milling device, seen from below, with additionally illustrated bearing frame for mounting the milling device in the truck,

Fig. 5

a plan view of a portion of the milling device, in full section.

figure description

The Fig. 1 and 2 The truck 1 has a front axle 4 with steerable wheels 5 and a rear axle 6 with wheels 7. In the region of a front end of the truck 1 is connected in a receptacle 8 connected to this, which extends in the transverse direction of the truck 1, the milling device 9 according to the invention mounted pivotably. The milling device 9 is mounted in a storage rack 10 which is pivotally mounted about a horizontal axis 11 which is arranged parallel to the axes 4 and 5 in the receptacle 8. Relative to a horizontal arrangement of the truck 1, the storage rack 1 and thus the milling device 9 in the in Fig. 1 shown working position of the milling device 9 arranged horizontally, parallel to a paved traffic area 12 from which an applied to this order, which is not shown, is removed.

This order is an order of relatively low strength, in particular a pavement marking, wherein the materials of the pavement marking in particular is sprayed plastic, thermoplastic, cold plastic, adhesive tape, paint, epoxy resin materials. This order can also be tire abrasion of airplanes on a runway. By means of the milling device 9 is applied to the paved road surface Order, thus adhering to the traffic surface order to be removed from the traffic area.

In the storage rack 10, a frame 13 of the milling device 9 is mounted, and it is in this frame 13, a chassis 14 of the milling device 9 is mounted. This chassis 14 has in the forward direction of the truck 1, two front, steerable rollers 15 in the region of both sides of the chassis 14 and in the rear two steerable rollers 16 also in the region of the two sides of the chassis 14.

In the in Fig. 1 shown working position of the milling device 9 contact the rollers 15, 16, the flat traffic surface 12th

The truck 1 has a suction device not illustrated in detail. Part of the suction device forms a solid but flexible suction tube 17, which is connected in the working position of the milling device 9 with this. By means of the suction device, up to 15,000 m ³ / h of suction air can be sucked through the suction pipe 17 by the milling device 9. Component of the functional unit 3 is not only the suction device, but also an unillustrated hydraulic unit for operating a hydraulic drive of the milling device 9 and an unillustrated water tank with also not illustrated high pressure pump together with high pressure lines which are connected to the milling device 9, for outputting the high pressure Water by spray nozzles of the milling device 9. Part of the functional units 3 is also a non-illustrated collection container for collecting the conveyed through the suction pipe 17 mixture of milled material, thus removed order and water.

Fig. 2 illustrates the arrangement of truck 1 and milling device 9 in the non-working position of the milling device 9. Here, the suction pipe 17 is separated from the milling device 9 and partially retracted over the cab 2, so that the driver's view when driving with the truck 1 is not hindered , All other connections to the milling device 9 can in the upward pivoted position of the milling device 9 are maintained. In this upwardly pivoted position of the milling device 9, this or the storage rack 10 assumes a substantially upright position relative to the traffic area 12.

3 shows the milling device in detail:

In the frame 13, the chassis 14 is mounted with the rollers 15, 16. Furthermore, the frame 13 has a central, substantially hollow cylindrically shaped frame projection 18, in which a hydraulic motor 19 is mounted. An output shaft 20 of the hydraulic motor 19 is rotatably connected to a spray bar 21. As Fig. 4 can be seen, this spray bar 21 is formed cross-shaped and takes in the region of its four ends 22 a plurality of spray nozzles, in each case three spray nozzles 23 at each end 22, on. The output shaft 20 is, with respect to the working position of the milling device 9, arranged upright to the traffic surface 12, in particular or specifically arranged perpendicular to the traffic surface 12. The spray bar 21 is arranged perpendicular to the output shaft 20, and it has the spray nozzles 23 from the spray bar 21 down to traffic area 12, preferably a spray cone of the respective spray nozzle 23 (based on a non-rotating state of the spray bar 21) adjusts, the axis of rotation parallel to the axis of rotation 24 of the output shaft 20 extends.

The arrows 25 illustrate the direction of flow of the high pressure liquid / water through the spray bar 21 to the spray nozzles 23. The arrow 26 illustrates, concerning the hydraulic motor 19, the input for pressure oil for driving the hydraulic motor 19 and the arrow 27 the output for the pressure oil from the hydraulic motor 19th

In the frame extension 18, an outer, hood-shaped housing 28 is mounted and connected thereto, further mounted in the frame approach 18, an inner hood-shaped housing 29 and connected thereto. In the working position of the milling device 9, the two housings 28, 29 are open towards the traffic surface 12, wherein the outer housing 28 has a flat opening surface 30 and the inner housing 29 forms a flat opening surface 31. The two opening surfaces 30 and 31 are perpendicular to the axis of rotation 24 of the hydraulic motor 9 and thus, based on the working position of the milling device 9, arranged parallel to the traffic surface 12. Here, the opening surface 31 of the inner housing 29 is disposed at a greater distance from the traffic area 12 than the opening area 30 of the outer housing 28. In a concrete, quite a preferred application, the opening area 30 of the outer housing 28 at a distance of 25 mm to the traffic area 12th arranged. The spray nozzles 23 are arranged at a distance from the traffic surface 12, which is slightly larger than the distance of the opening surface 30 of the traffic area 12, thus less than the distance of the flat surface 31 of the inner housing 29 of the traffic surface 12th

Outside the outer housing 28, which has the function of a suction bell, an encircling around the outer housing 28 skirt 32 is arranged, which is mounted in a further frame extension 33 of the frame 13. In the working position of the milling device 9, the apron 32 contacts the traffic surface 12 circumferentially. On the side facing away from the traffic surface 12 of the skirt 32 is formed between this and the outer housing 28 around the axis of rotation 24 of the hydraulic motor 19 encircling opening 34 sucked from the environment suction air. This opening 34 is thus formed as an annular opening.

Due to the arrangement of the two housings 28 and 29 to each other thus a gap 35 is formed between them. Because of the rotationally symmetrical arrangement of the two housings 28 and 29 of this gap 35 is also designed rotationally symmetrical. However, the gap formed as an annular space 35 is divided into intermediate space areas, namely the in Fig. 5 Specifically, the space 35 formed between the housings 28 and 29 is divided into the space portions 36 to 38 by two partition walls 39 and 40. Between the two partitions 39 and 40, the intermediate space region 36 forms a central suction space, the partitions 39, 40 delimiting this central suction space 36 opening into a guide pipe 41. Furthermore, between the respective partition 39 and 40 and the this associated segment of the outer housing 28, the gap regions 37 and 38 formed, which constitute lateral Absaugräume. These open directly into a suction nozzle 42 which is connected to the outer housing 28. The guide tube 41 protrudes partially into the suction nozzle 42, wherein the three separate Saugluftströme, which are guided through the intermediate space areas 36 to 38, unite in the suction nozzle 42 and are sucked from there by the suction pipe 42 connected to the suction pipe 17 of the truck 1.

The Fig. 3 and 5 illustrate on the basis of the arrow representations the mode of action of the milling device with suction (and suction) in their working position and during operation:

By supplying hydraulic oil according to arrow 26 to the hydraulic motor 19 and discharge of hydraulic oil according to arrow 27 from the hydraulic motor 19, the hydraulic motor 19 is driven and offset the spray bar 21 in rotation about the axis of rotation 24. The speed of the spray bar 21 is for example 3000 U / min. By the output shaft 23 of the hydraulic motor 19, water is passed under high pressure, for example at a pressure of 2500 bar, through the spray bar 21 and the various spray nozzles 23 supplied, as illustrated by the arrows 25. The liquid exits under high pressure from the spray nozzles 23. The exit cone of the water emerging from the respective spray nozzle 23 is illustrated by the reference numeral 43. The water emerging from the spray nozzles 23 hits the traffic area 12 at high pressure and removes the order from the traffic area fastened to or adhering to the traffic area. Due to the kinematics, the respective spray nozzle 23 describes a circular movement with respect to the axis of rotation 24, this movement being superimposed by the advancing movement of the milling device 9 with respect to the traffic surface 12 due to the travel movement of the truck 1.

Superimposed on this milling process is drawn via the suction pipe 17 of the truck 1 and thus the suction nozzle 42 of the milling device 9 suction air with negative pressure according to the arrows 44 from the suction nozzle 42. This has the suction device of the truck 1 such a power that with this example 15000 m ³ / h suction air can be sucked through the suction port 42. This suction air passes as shown by the arrows 45 and the associated flow lines 46 through the annular opening 34 from outside the milling device 9 in the area between the skirt 32 and the outer housing 28 and from there through the opening surface 30 of the outer housing 28. Then divides the suction air flow due to the arrangement of the partitions 39 and 40 on the intermediate space regions 36 to 38 and passes from the intermediate space 36 through the guide tube 41 to the suction nozzle 42 and the intermediate space regions 37 and 38 directly into the suction nozzle 42. The inflow of the suction air from the space between the skirt 32 and the outer housing 28 in the outer housing 28 in the region of the opening surface 30 is thus directed opposite to the radially outwardly directed centrifugal movement of the water and the order removed from the traffic surface, so that between the outer housing 28 and the inner housing e 29 suction air flowing into the intermediate space 35 entrains the water and the removed order, whereby this mixture leaves the suction nozzle 42 and is sucked from the suction pipe 17 in the space provided for the functional unit 3 of the truck 1. After the further ancestor of the milling device 9 remains a traffic area whose order is removed, this traffic area is dried due to the flow of suction air with a large volume. The described annular gap extraction works with little negative pressure, in particular about 20% vacuum and thus a high amount of air, at high air velocity. The generated flow rate absorbs even the smallest liquid particles. By the attached flexible skirt 32, which is formed of individual skirt elements 47, which consist for example of natural rubber, the risk of flying particles is significantly minimized and ensures a high level of safety.

Fig. 4 illustrates the stored in the storage rack 10 milling device 9. This has the bearing shafts 11 for pivotally mounting the storage rack 10 and thus the milling device 9 in the receptacle 8 of the truck 1. Medium, In particular, hydraulic cylinders for pivoting the storage rack 10 with respect to the receptacle 8 are not illustrated.

LIST OF REFERENCE NUMBERS

1

Lorry

2

cab

3

functional element

4

axis

5

wheel

6

axis

7

wheel

8th

admission

9

milling device

10

storage rack

11

axis

12

traffic area

13

frame

14

chassis

15

role

16

role

17

suction tube

18

framework approach

19

hydraulic motor

20

output shaft

21

spray bars

22

The End

23

nozzle

24

axis of rotation

25

arrow

26

arrow

27

arrow

28

outer casing

29

inner casing

30

opening area

31

opening area

32

apron

33

framework approach

34

opening

35

gap

36

Interspace region

37

Interspace region

38

Interspace region

39

partition wall

40

partition wall

41

guide tube

42

suction

43

exit cone

44

arrow

45

arrow

46

streamline

47

apron segment

Claims (14)

1. Milling device (9) for removing material applied to paved traffic surfaces (12), in particular applied carriageway markings or aircraft tyre abrasion applied to a take-off/landing strip, wherein the milling device (9) in a working position is movable relative to the traffic surface (12), with an outer hood-shaped housing (28) and an inner hood-shaped housing (29) surrounded by the latter, a spray bar (21) which is arranged within the inner housing (29), is rotatable about an axis of rotation (24) by means of drive (19) and has spray nozzles (23) for the passage of liquid under high pressure, and also with a suction port (42) which is connected to the outer housing (28) and is connectable to a suction device (17), wherein, with respect to the working position of the milling device (9), the two housings (28, 29) are open towards the traffic surface (12), the spray bar (21) with the spray nozzles (23) is rotatable about an axis (24) which is perpendicular to the traffic surface (12), and liquid discharged from the spray nozzles (23) during the milling and milled material are sucked off by an interface (35) formed between the housings (28, 29) and by the suction port (42), characterized in that the intermediate space (35) formed between the housings (28, 29) is divided into intermediate space regions (36, 37, 38) in such a manner that liquid discharged from the spray nozzles (23) and milled application material flows from the intermediate space regions (36, 37, 38) into the suction port (42).
2. Milling device according to Claim 1, wherein the milling device (9) has a chassis (14) and rolling means (15, 16) mounted in the latter, in particular wheels (15, 16), wherein, in the working position of the milling device (9), the rolling means (15, 16) are in contact with the traffic surface (12).
3. Milling device according to Claim 1 or 2, wherein, in the working position of the milling device (9), the opening of outer housing (28) and/or inner housing (29), which opening is directed towards the traffic surface (12), forms a flat opening surface (30, 31) .
4. Milling device according to Claim 3, wherein the flat opening surface (30, 31) of outer housing (28) and/or inner housing (29) is arranged parallel to the traffic surface (12).
5. Milling device according to Claim 3 or 4, wherein the flat opening surface (31) of the inner housing (29) is arranged at a greater distance from the traffic surface (12) than the flat opening surface (30) of the outer housing (28).
6. Milling device according to one of Claims 3 to 5, wherein, in the working position of the milling device (9), the flat opening surface (30) of the outer housing (28) is arranged at a distance of 10 mm to 60 mm, preferably 20 mm to 30 mm, in particular 25 mm, from the traffic surface (12).
7. Milling device according to one of Claims 1 to 6, wherein outside the outer housing (28), a skirt (32) is arranged running around the outer housing (28), wherein, in the working position of the milling device (9), the skirt (32) peripherally makes contact with the traffic surface (12), and, on that side of the skirt (32) which faces away from the traffic surface (12), an opening (34) for suction air is formed between said skirt and the outer housing (28).
8. Milling device according to Claim 7, wherein the skirt (32) is flexible, in particular is formed from flexible skirt segments (47) which are arranged perpendicular to the traffic surface (12) in the working position of the milling device (9).
9. Milling device according to Claim 7 or 8, wherein the opening (34) for suction air between the skirt (32) and the outer housing (28) is designed as an encircling annular opening.
10. Milling device according to one of Claims 1 to 9, wherein the intermediate space (35) formed between the housings (28, 29) is designed as an annular space.
11. Milling device according to one of Claims 1 to 10, wherein the intermediate space (35) formed between the housings (28, 29) is divided into the intermediate space regions (36, 37, 38) by partitions (39, 40), in particular two partitions (39, 40) form a central sucking-off space (36) which is connected to a conducting pipe (41) arranged within the suction port (42), and two lateral sucking-off spaces (37, 38) which open directly into the suction port (42).
12. Milling device according to one of Claims 3 to 11, wherein the flat opening surface (30, 31) of outer housing (28) and/or inner housing (29) is circular, wherein an axis of rotation (24) of the spray bar (21) runs through the circle centre point.
13. Milling device according to one of Claims 1 to 12, wherein the milling device (9) has a frame (13), wherein the frame (13) is provided with a receptacle (11) for the mounting, in particular pivotable mounting of the milling device (9) in a motor vehicle (1) which has a suction device and a pump unit for high-pressure liquid.
14. Method for operating a milling device (9) according to one of Claims 1 to 13, wherein, for removal of the application material, said milling device (9) is operated at a rotational speed of the spray bar (21) of 2000 rpm to 3000 rpm, in particular 2500 rpm to 3000 rpm, a pressure of the liquid, in particular water, of 150 to 2500 bar, in particular 1500 to 2500 bar, a negative-pressure quantity of air, which emerges out of the milling device (9) through the suction port (42), of 7500 m³/h to 15,000 m³/h, in particular 12,000 m³/h to 15,000 m³/h.

Images