Paver

Abstract

The invention relates to a paver which can be operated in a particularly simple manner. This is achieved in that at least one hose reel (27) is fastened to the paver (10), on which hose reel at least one hose (26) for supplying the spraying beam (22) with the emulsifier can be wound and unwound. The hose reel (27) is fastened to the main frame or to the chassis and is oriented in such a way that the unwinding and winding directions thereof are oriented transversely or perpendicularly to the laying direction (12) or at least almost parallel to the spray beams (22).

Description

Technical Field

[0001] The invention relates to a road paving machine according to the preamble of claim 1 . Background Art

[0002] Asphalt pavement is usually formed by a plurality of superimposed layers. In order to improve adhesion, an emulsion containing bitumen, in particular an asphalt emulsion, is arranged between the layers. When laying a new or next layer, the emulsion is usually sprayed on the previously laid layer below it in a fully covering manner. For this purpose, paving machines for paving pavement, in particular pavers or spray pavers, are equipped with a spraying device, which applies the emulsifier used as an adhesion promoter to the base layer before the paving machine applies the next pavement layer on the base layer.

[0003] For this purpose, this road paving machine carries a certain reserve amount of emulsifier. Here, the emulsifier is located in a tank, which is integrated in the chassis of the road paving machine. During the paving of the road surface, the emulsifier is supplied to the so-called spraying beam of the spraying device through the tank. The spraying beam usually refers to three beams, on which a plurality of nozzles oriented in the direction of the foundation are arranged. These beams can be oriented transversely to, preferably perpendicular to, the paving direction and can be movably arranged on the road paving machine. Therefore, when observed in the paving direction, for example, the known road paving machine has a front spraying beam on the front bumper. In addition, at the rear of the road paving machine, a rear spraying beam that can be screwed in and out or moved in and out is respectively provided in the lateral direction. The rear spraying beam is located behind the running gear and also covers the two-lane area, while the front spraying beam is positioned between the running gear so that the foundation between the running gear can be wetted by the emulsifier. In order to pave the road surface, the two rear spraying beams are screwed out or moved out, so that the entire paving width of the road paving machine is covered and can be loaded with emulsifier. After the process is complete, the beams are screwed in or moved in again, whereby the width of the road paving machine is reduced for further transport.

[0004] In order to supply the individual nozzles with emulsifier, the spraying beam is connected to a tank via a hose or a circulation system via a hose. In order to convey the emulsifier via the hose to the nozzles and back, a pump is used which is usually driven by a hydraulic motor of the road paving machine. In order to supply the individual nozzles, one hose is led as a feed line from the tank to the respective beam and along the beam, while another hose is led as a return line from the respective beam back to the emulsifier tank. In addition, electrical cables as well as pneumatic hoses are also led to the beam for controlling the valves of the individual nozzles.

[0005] Especially when the spraying beam is moved outwards from the main frame laterally, the guidance and storage of the hoses and cables are problematic. In the moved-in state, the hoses or cables are fixed with one end to the main frame or chassis of the road paving machine and with the other end to the opposite end of the respective spraying beam. When the spraying beam is moved outwards, the hoses and cables move outwards together with the spraying beam and form a large loop when moving out. These unguided lines take up a lot of space, present a potential risk of injury to personnel and, moreover, have to be cleaned regularly because they are heavily soiled. Another disadvantage is that the storage of the hoses in the retracted state requires a lot of space under the road paving machine. Summary of the invention

[0006] The object of the present invention is to provide a paver, which can solve the above-mentioned problems.

[0007] The road paving machine for achieving this object has the features of claim 1. It is therefore provided that at least one hose reel is fixed to the road paving machine, on which at least one hose for supplying the emulsifier to the spraying beam can be wound and unwound. The hose reel is fixed to the main frame or chassis and is oriented in such a way that its unwinding and winding direction is transverse or perpendicular to the laying direction or at least almost parallel to the orientation of the corresponding spraying beam. Before the laying process begins, the at least one hose is wound on the hose reel. The hose on the hose reel is protected from contamination. During the preparation for the laying process, the spraying beam is moved out from the side. By connecting the hose end to the end of the spraying beam, the hose reel also automatically moves and unwinds the hose. During this moving out or unwinding process, the hose can be placed in a receptacle or guide on the beam in a specified manner, whereby the hose does not pose a safety risk to personnel. After the laying process is completed, the spraying beam is moved in again. At the same time, the hose reel is also moved and the hose is wound. The moving in of the beam and the winding of the hose are preferably carried out synchronously.

[0008] Preferably, the second end of the hose is connected to the pump or tank via a connection, preferably a swivel flange or a swivel joint, while the first end of the hose is connected to the first section of the spray bar. By rotatably connecting the second end of the hose to the supply line for the emulsifier, the hose can be connected to the pump together with the supply line during unwinding and winding. Alternatively, it is also conceivable that the hose is separated from the supply line for unwinding and winding. Furthermore, according to the invention, it can be provided that the first end of the hose can be connected to the supply hose of the nozzle of the spray bar via a coupling.

[0009] A particular embodiment of the invention can provide that a first hose, preferably for guiding the emulsifier to the nozzle, and / or a second hose, preferably for returning the emulsifier to the nozzle, and / or a second hose, preferably for returning the emulsifier to the tank, and / or at least one current-carrying cable and / or at least one pneumatic hose, are wound on the hose reel. Accordingly, all pipelines (hoses, cables) for operating the spray beam are guided on the hose reel and unwound for the laying process and wound again after the process is over. All pipelines are preferably connected to the pump or tank via a connecting mechanism, preferably a rotating flange or a swivel joint. By winding and unwinding the pipelines together and by storing the pipelines together on the hose reel, the pipelines can be handled in a particularly space-saving and reliable manner. In addition, unnecessary contamination of all pipelines is prevented.

[0010] By fastening the at least one hose reel directly to the chassis or the main frame, a particularly simple, space-saving and practical storage and handling of the spray bar is achieved. The invention preferably provides that a hose reel is assigned to each spray bar. In this case, the individual hose reels are assigned directly to the spray bar on the respective side of the main frame, so that when the bar is extended, the lines or hoses are fed directly to the bar. Likewise, when the bar is extended, the lines of each spray bar are directly wound back on the respective hose reel.

[0011] In particular, it is provided that a mechanical spring is integrated into the hose reel, which is prestressed when the hose is unwound. By unwinding the hose, energy is stored by mechanical tensioning of the spring, which energy is used to rotate the reel in the opposite direction when the hose is rewound, and thus to rewind the at least one hose. In addition, it can be provided according to the invention that the unwound hose can be rewound onto the hose reel with the support of an electric motor. It is also conceivable that a traction rope is wound onto the hose reel with the at least one hose, and that the extended spraying bar is pulled in again with the traction rope. For this purpose, the hose reel must be equipped with an electric motor of corresponding dimensions. In addition, it is also conceivable that the drive for moving the spraying bar in and out, which drive can in particular be a hydraulic motor, also drives the hose reel, and the movement of the hose reel is preferably coupled to the movement of the spraying bar.

[0012] Finally, it is also conceivable that the at least one spraying beam has a guide for the at least one hose. The guide can be, for example, a groove-like or channel-like receptacle on the upper side of the beam, into which receptacle the at least one hose and further lines or cables are inserted when unwinding or removing and from which the at least one hose and further lines or cables can be removed without additional effort when winding or retracting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The preferred embodiments of the present invention are described in detail below with the help of the accompanying drawings. In the accompanying drawings:

[0014] Figure 1 shows a schematic side view of a paving machine;

[0015] Figure 2 a schematic diagram showing the chassis prior to the laying process; and

[0016] Figure 3 Schematic diagram showing the chassis during laying. DETAILED DESCRIPTION

[0017] As an example of a paving machine, Figure 1 Schematically shown in the figure is a road paver 10. The road paver 10 basically has a chassis 11, on which a storage container 14 for accommodating paving material is arranged at the front end 13 as viewed in the paving direction 12. A tank 15 for accommodating an emulsifier, a travel drive 16 and an operating console 17 follow the storage container 14 in the opposite direction of the paving direction 12. In addition, the chassis 11 is equipped with a crawler-type running gear 18. Instead of the crawler-type running gear 18, it is also conceivable that the road paver 10 has a wheeled running gear. The running gear 18 is driven by the travel drive 16. The travel drive 16 shown here is an internal combustion engine. However, it is also conceivable that the road paver 10 is driven by an electric drive or by means of a fuel cell.

[0018] The screed plate 19 and the spreading screw (not shown) are positioned below the control panel 17. During paving, the hot paving material is pulled through the screed plate 19, thereby compacting the paving material to form a road surface. The width of the screed plate 19, which can be pulled out if necessary, defines the paving width or road width. The screed plate 19 can be moved up and down by means of a hydraulic cylinder via a support arm 20 for paving the road surface, in order to change the thickness of the road surface. During paving, the paving material is transported from the front end 13 of the storage container 14 to the front of the spreading screw or the screed plate 19 in the opposite direction of the paving direction 12 by a conveyor belt (not shown) during paving.

[0019] Both the control of the road paver 10 and the control of the spraying device are performed by a control unit assigned to the control console 17. However, it is also conceivable that the control unit is located externally on the road paver 10 or that wireless remote control can be realized via a corresponding mobile device. The operator can directly input paving parameters or start a predetermined program via the control unit, which is then executed by the individual units of the road paver 10.

[0020] In order to provide, in particular, continuous asphalt pavements with sufficient adhesion to one another, the subgrade is sprayed with an emulsifier before a further asphalt layer is applied. For this purpose, the paver 10 shown here is equipped with a spraying device. The spraying device comprises a front spraying beam 21 and two rear spraying beams 22. The spraying beams 21, 22 have a plurality of nozzles 23, by means of which the emulsifier can be applied to the subgrade. For this purpose, the spraying beams 21, 22 are connected to the tank 15 via a hose 24. In accordance with the invention, the emulsifier is sprayed onto the subgrade. Figure 1 The view of FIG. 1 shows a hose 24 from the tank 15 to the front spray beam 21 and to the rear spray beam 22. The hose 24 can also be led from the front spray beam 21 to the rear spray beam 22. For better viewing, the hose 24 is Figure 1 In FIG. 1 , the hose 24 is shown in dashed lines “in front” of the road paving machine 10 . However, the invention provides that the hose 24 is arranged concealed underneath or in the chassis 11 .

[0021] Figure 2 A view of the chassis 11 of a road paving machine 10 is shown. It can be seen from this illustration that the spraying beams 21, 22 are designed in the form of beams and are oriented on the chassis 11 transversely or perpendicularly to the laying direction 12. The nozzles 23 are arranged at constant distances along the beams 21, 22. The nozzles 23 are only indicated schematically here and point with their openings in the direction of the ground to be paved. The individual valves assigned to the nozzles 23 are opened by a corresponding control device so that the emulsifier is sprayed from the nozzles 23 onto the ground in the form of a spray cone or a spray jet. The nozzles are dimensioned and spaced apart from each other in such a way that the emulsifier is applied to the ground uniformly and without gaps along the laying direction 12. In order that the road surface below the chassis can also be adequately coated with emulsifier, the rear spraying beam 22 is accordingly arranged behind the chassis but in front of the screed 19.

[0022] Before the paving process begins, the rear spraying beam 22 is moved in to reduce the width of the paving machine 10. To this end, Figure 2 In the road paving machine 10 shown highly schematically in FIG. 1 , two rear spraying beams 22 are arranged on the chassis 11 slightly offset from one another when viewed in the laying direction 12. The arrangement and orientation of the spraying beams 22 on the chassis 11 shown here are for information purposes only. In particular, the integration of the spraying beams 22 into the chassis 11 may differ from the form shown here. In order to move the spraying beams 22 out or in along or against the arrow direction 25, the road paving machine 10 has a corresponding drive (not shown here).

[0023] During the laying process, the spraying beam 22 is moved out according to the laying width. The maximum length of a single beam 22 can be 1m to 3m, preferably 2m. Figure 3Schematically shown in FIG. It can be seen here that the entire laying width of the paving machine 10 is covered by the beams 21, 22 or the nozzles 23. In order to supply the individual nozzles 23 with emulsifier during the laying process, hoses 26 are connected to the nozzles 23. These hoses 26 form a circulation loop with the nozzles 23 and the tank 15. For this purpose, it is provided that for each beam 22, one hose 26 is used as a feed line and one hose 26 is used as a return line. In addition, cables and pneumatic hoses (pipes) (not shown) are guided along the beams 22 in order to control the nozzles 23 and the valves.

[0024] In the non-extended state of the rear spraying beam 22, the hoses 24 and possibly cables and pneumatic hoses are each wound on a hose reel 27. As shown highly schematically in the drawing, a hose reel 27 is associated with each side of the chassis 11 or each spraying beam 22. The hose reels 27 are fastened to the chassis 11 and are oriented transversely to the laying direction 12 or at least approximately parallel to the beam 22. The hose reels 27 are fastened in such a way that they can be rotated in the direction of the beam 22.

[0025] In preparation for the laying process, the rear spraying beam 22 is moved outward in the direction of the arrow 25. This movement also moves the hose reel 27 and unwinds the hose 26 and possibly cables and pneumatic hoses. In this process, the above-mentioned pipelines can be placed on the upper side of the beam 22. For this purpose, it is conceivable that the upper side is designed in the form of a groove or channel to accommodate the pipelines.

[0026] exist Figure 3 2 shows how the hose reel 27 is at least almost completely unwound and the hose 26 extends over the entire length of the spray bar 22 for supplying the nozzles 23 .

[0027] The hose drum 27 can be connected to the tank 15 via another pipeline (not shown). For this purpose, it is conceivable that the hose drum 27 each has a rotatable flange so that the connection to the other pipeline can be maintained even during the rotation of the hose drum 27. As an alternative, it is also conceivable to disconnect the connection between the hose drum 27 and the other pipeline during the unwinding and winding process.

[0028] After the laying process is completed, the spraying bar 22 is moved in again. By this movement in, the hose 26 and possibly other cables and pneumatic hoses are also rewound onto the hose reel 27. For this purpose, it is provided that the hose reel 27 is driven. This drive can be realized by an electric motor or by a spring preload that is formed during the unwinding process.

[0029] Reference numerals list

[0030] 10 Paving Machine

[0031] 11 Chassis

[0032] 12 Laying direction

[0033] 13 Frontend

[0034] 14 Storage Containers

[0035] 15 Storage Tanks

[0036] 16 Travel drive

[0037] 17 Operation table

[0038] 18 crawler travel mechanism

[0039] 19 Screed

[0040] 20 Support arm

[0041] 21 Front spray beam

[0042] 22 Rear spray beam

[0043] 23 Nozzle

[0044] 24 Hose

[0045] 25 Arrow direction

[0046] 26 Hose

[0047] 27 Hose reel

Claims

1. A paver (10) for laying a road surface, the paver having at least one spraying beam (22) movably arranged on the paver (10), to which a plurality of nozzles (23) are fastened, and the paver having a tank (15) for containing an emulsifier, wherein: The at least one spraying beam (22) and the nozzle (23) are connected to the tank (15) via at least one hose (24), and the emulsifier is pumped from the tank (15) to the nozzle (23) via the at least one hose (24) during road paving and sprayed onto the foundation by the nozzle (23), characterized in that a hose reel (27) fixed to the paver (10) is provided, and at least one hose (26) can be wound and unwound on the hose reel.

2. The paving machine (10) according to claim 1, characterized in that: A first end of the hose (26) is connected to a first section of the spray bar (22), and a second end of the hose (26) is connected to the drum (27).

3. The paving machine (10) according to claim 2, characterized in that: The second end of the hose (26) is connected to the pump or tank (15) via a connection mechanism, preferably a swivel flange or a swivel joint.

4. The paving machine (10) according to claim 2, characterized in that: The first end of the hose (26) can be connected to the supply hose of the nozzle (23) via a coupling.

5. The road paving machine (10) according to any one of the preceding claims, characterized in that A first hose (26) for preferably conducting the emulsifier to the nozzle (23) and / or a second hose (26) for preferably returning the emulsifier to the tank (15) and / or at least one current-carrying cable and / or at least one pneumatic hose are wound around the hose reel (27).

6. The road paving machine (10) according to any one of the preceding claims, characterized in that The hose drum (27) is fixed on the chassis (11) or the main frame of the paving machine (10).

7. The road paving machine (10) according to any one of the preceding claims, characterized in that Two hose reels (27) are fastened to the chassis (11) or to the main frame of the road paving machine (10), each of which is assigned to a spraying beam (22).

8. The road paving machine (10) according to any one of the preceding claims, characterized in that Two spraying beams (22) can be moved perpendicularly to the laying direction (12) of the paver (10) relative to the chassis (11) or on the main frame of the paver (10), and when moving out, the at least one hose (26) is unwound from the hose reel (27) by means of the spraying beams (22).

9. The road paving machine (10) according to any one of the preceding claims, characterized in that The hose reel (27) has a mechanical spring which is prestressed when the hose (26) is unwound.

10. The road paving machine (10) according to any one of the preceding claims, characterized in that The unwound hose (26) can be rewound onto the hose reel (27) with the assistance of an electric motor or by spring force.

11. The road paving machine (10) according to any one of the preceding claims, characterized in that The at least one spray beam (22) has a guide for the at least one hose (26).

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