Road construction machine with air barrier device and method

Abstract

This invention relates to road construction machinery, particularly suitable for the form of a road paver (1) or a feeder (14) for a road paver (1). According to the invention, the road construction machinery includes a first air barrier device (20) and / or a second air barrier device (29), adapted to protect the driver (F) and / or operator (B) of the road construction machinery. Furthermore, the invention relates to a corresponding method for generating airflow during the operation of the road construction machinery to protect the driver (F) and / or operator (B) from rising vapors and / or aerosols (D) during the operation of the road construction machinery.

Description

Technical Field

[0001] This invention relates to road construction machinery, particularly a road paver or a feeder for a road paver. Furthermore, this invention relates to a method for generating airflow. Background Technology

[0002] During the operation of road construction machinery, particularly during the paving operation of a road paver or while a feed truck traveling in front of the road paver is supplying paving material, vapors and asphalt aerosols may be generated near the road paver or feed truck. This is especially true when conveying or paving hot paving material.

[0003] EP0843044A1 discloses a road paver and a feeding device with a suction system adapted to extract vapors and aerosols from an area above a distribution screw positioned in front of the paving screed and discharge them above the canopy of the operating platform. Furthermore, the suction system is adapted to extract vapors from the hopper area for paving material and discharge them above the canopy structure. On the feeding vehicle, the suction system can extract vapors and aerosols generated in the hopper area, as well as vapors and aerosols generated along the conveying device in the feeding device, and discharge them above the canopy structure to reduce the concentration of vapors and aerosols in the feeding vehicle environment.

[0004] DE102012007869A1 also discloses a road paver with a suction device that can draw vapors and aerosols along a longitudinal conveyor for paving materials, which operates below an operating platform within the chassis. The vapors and aerosols are then fed into an exhaust system, whereby the vapors and exhaust gases are blown out together from the end of an exhaust pipe located above the protective cover and into the environment.

[0005] JP2014-139388A discloses another suction system adapted to suction from the area of ​​a lateral distributor that laterally distributes paving material in front of the screed and discharges it above the driver's operating area.

[0006] The aforementioned suction devices are suitable for extracting vapors and / or aerosols from the road paver or feeder at the source and discharging them above the canopy structure or above the operating platform built for the driver. A disadvantage of this approach is that experience has shown that the performance of these suction systems is insufficient to prevent vapors and / or aerosols from entering the driver's operating area or other operating areas provided for the operator on the road paver or feeder.

[0007] WO2013 / 185867A1 discloses a suction device whose suction port is associated with the area of ​​the lateral distribution screw of a road paver, wherein an air blowing device is further provided above the material distribution area for air purification to form a horizontally covering suction airflow.

[0008] JP2014-139389A discloses a road paver having an air blowing device located at the front of the engine hood that generates a forward airflow above the hopper along the direction of travel of the road paver, wherein vapor and / or aerosol rising from the hopper can be covered by the airflow.

[0009] DE102020123723A1 discloses a road paver having at least one air nozzle unit upstream of the screed in the paving direction for generating a vertical and / or horizontal air curtain. This air curtain, generated by the air nozzle unit, defines an area between a first and second side plate of the screed, allowing for easier extraction of paving material vapor from this area via a suction device. This air curtain has the same technical effect as a horizontal or vertical covering around the distribution screw area. Furthermore, DE102020123723A1 discloses an air nozzle unit disposed on the operating platform of the road paver to form an air curtain around the operating platform, thereby preventing vapor from entering the area of ​​the operating platform. Summary of the Invention

[0010] The object of this invention is to provide road construction machinery, particularly a road paver or a feeder for a road paver, on which vapors and / or aerosols can be better kept away from the operators of the road construction machinery. Furthermore, the object of this invention is to provide a corresponding method.

[0011] This objective is achieved by road construction machinery or methods according to embodiments of this disclosure.

[0012] This invention relates to road construction machinery, particularly suitable for road pavers or material supply vehicles for road pavers. The road construction machinery according to the invention includes at least one operating platform for the driver of the road construction machinery and / or an external control station for the operator of the road construction machinery. Furthermore, the road construction machinery according to the invention includes at least one first air barrier device for the driver of the road construction machinery and / or at least one second air barrier device for the operator of the external control station of the road construction machinery. Additionally, the road construction machinery according to the invention includes a hopper arranged in front of the operating platform along the direction of travel and having a transverse hopper half for receiving paving material.

[0013] In this invention, viewed from above, a first air barrier device is adapted to generate at least one directional airflow in the form of an air wall extending in a region laterally present on the operating platform and / or a second air barrier device is adapted to generate at least one directional airflow in the form of an air wall extending in a region laterally present on the external control station.

[0014] Viewed from above, the aforementioned areas are located on the side of the actual geometry of the road construction machinery and are easily accessible to the driver and / or operator in practice for controlling and / or monitoring the operation of the machinery. According to the invention, the air walls formed within these outer areas create air barriers to isolate the driver and / or operator from vapors and / or aerosols. Furthermore, the airflow used to create the air walls can provide a suction effect to remove air that may be contaminated by vapors and / or aerosols.

[0015] In this invention, the operating platform can have an open outer side when viewed from the direction of travel. Vapors and / or aerosols can typically be drawn into areas of the operating platform through these open outer sides. An air wall according to the invention can be formed adjacent to the operating platform, i.e., in a laterally adjacent region of the operating platform, so that vapors and / or aerosols can be better kept away from the open outer side.

[0016] The air barrier created outside the operating platform by the first air barrier device effectively isolates the area on the side of the operating platform from vapors and / or aerosols rising from the hopper (particularly the transverse half of the hopper). This beneficial isolation effect on the driver of the road construction machinery is particularly achieved when the driver is positioned on the side of the operating platform, for example, when the driver's seat control panel is rotated laterally beyond the operating platform, thus placing the driver himself within that area, i.e., close to the side of the operating platform.

[0017] Another beneficial effect is that aerosols and / or vapors rising next to the operating platform can be blown away from the driver by airflow directed into the side areas to form air walls, regardless of whether the driver's seat console is rotated out.

[0018] The second air barrier device, positioned adjacent to the air wall created by the external control station, provides operators located to the side of the external control station with a similar barrier effect against rising vapors and / or aerosols as the first air barrier device provides to the side of the operating platform. Specifically, it allows vapors and / or aerosols from the lateral distributor ducts to be better kept away from the driver.

[0019] In practice, drivers and / or operators tend to stay on the sides of road construction machinery, particularly the sides that are lateral to the operating platform and / or lateral to the adjacent external control station. The air walls formed in these areas are particularly effective in isolating them from rising vapors and / or aerosols.

[0020] Preferably, the air wall generated by the first and / or second air barrier devices is adapted to act as an air wall intersecting the direction of travel of the road construction machinery. Specifically, the airflow used to generate the air wall can be blown laterally from the road construction machinery at a right angle or a predetermined angle to the direction of travel. This achieves a dual effect. On the one hand, the air wall formed in this way can thus effectively protect the driver and / or operator located in the lateral area, i.e., the driver and / or operator adjacent to the operating platform, and / or the driver and / or operator located outside the external control station, from the effects of rising vapors and / or aerosols. In essence, such an air wall forms an air curtain for the driver and / or operator of the road construction machinery, which at least reduces vapors and / or aerosols in their lateral occupied area. On the other hand, the airflow ejected by the road construction machinery to the outside or directed forward at an angle can laterally transport aerosols and / or vapors away from the driver and / or operator. For example, an air wall is created in the adjacent area by being near the operating platform and / or the adjacent external operating station at an angle between 30° and 60° with respect to the direction of travel.

[0021] According to one embodiment of the invention, the first air barrier device includes at least one nozzle arranged on a canopy section that extends laterally in the direction of travel, at least one nozzle arranged on a driver's seat control panel that can be rotated laterally relative to the operating platform, at least one nozzle arranged on an A-pillar of the canopy structure, and / or at least one nozzle arranged on a hopper half, for generating an air barrier. Using these variations, areas on the sides of the operating platform can be effectively isolated from rising vapors and / or aerosols.

[0022] It is conceivable that the nozzles of the first air barrier device are integrally formed on the assembly of the extendable canopy section. Specifically, the nozzles are arranged on the carrier of the extendable canopy section facing the hopper, for example, in the form of a blowrod extending substantially along the carrier. An air wall generated from top to bottom in an area positioned to the side of the operating platform via this blowrod is substantially transverse to the direction of travel of the road construction machinery and can effectively protect the operator located behind it, outside the operating platform, or on the operating platform, from the effects of vapors and / or aerosols rising from the hopper area.

[0023] Preferably, the nozzle of the first air barrier device is integrally formed on the lower structure of the driver's seat console, such as on the base plate, and / or integrally formed on the fall protection device of the driver's seat console, such as within the railing portion. This ensures that the air barrier generated by the nozzle is directly associated with the driver's seat console, and thus with the driver sitting there, to isolate vapors and / or aerosols, particularly when the driver's seat console rotates laterally beyond the operating platform. For example, the nozzle may extend along the outer edge of the lower structure located forward in the direction of travel, or be formed as part of the upper railing portion for fall protection, for example in the form of a cylindrical tube having multiple exhaust ports for generating directional airflow.

[0024] One variation allows the nozzle of the first air barrier device to be integrated within the A-pillar, such that the A-pillar forms the housing of the nozzle. For example, the A-pillar is adapted to be in the form of a hollow profile, with the nozzle extending at least partially within the A-pillar in the form of a tube. In this case, the nozzle exhaust port can be aligned with an exhaust port formed in the A-pillar to form an air wall according to the invention for protecting the driver from rising vapors and / or aerosols.

[0025] Preferably, the first air barrier device includes a first nozzle mounted along the A-pillar and a second nozzle mounted along the B-pillar positioned behind the A-pillar in the direction of travel, such that the two air walls generated by these nozzles at a distance from each other form air passages on the side of the operating platform that are at least confined to the front and rear of the driver located in that area. This means that the driver, especially if he is located on the driver's seat console on the side of the operating platform, can be protected from both vapors and / or aerosols from the hopper area and vapors and / or aerosols rising from the transverse distributor duct behind him in the direction of travel.

[0026] Advantageous embodiments of the invention provide that the nozzle of the first air barrier device is formed inside the upper edge of the hopper half. In this way, vapors and / or aerosols rising from the outer region of the hopper half can be shielded directly at the upper edge of the hopper. Preferably, the nozzle extends at least partially along the upper edge of the rear wall of the hopper half and / or at least partially along the upper edge of the outer wall of the hopper half, so as to advantageously block, dilute, and transport away vapors and / or aerosols rising from the outer region of the hopper. The air wall formed in this way forms a functional extension on the rear wall of the hopper and / or on the outer wall of the hopper, and can form an air sidewall extending beyond the hopper wall made of metal. This allows vapors and / or aerosols from the hopper to be better shielded and better transported upwards away above the height level of the driver and other operators working in the road construction machinery area.

[0027] It is conceivable that the first air barrier device, or at least one blower device supporting the first air barrier device mounted on road construction machinery, is adapted to generate at least one directional airflow in the form of an air wall, which is distributed at least partially along the front region of the operating platform in the direction of travel. This air wall may extend directly in front of the operating platform in the direction of travel, and particularly extends from the operating platform as an air barrier.

[0028] Preferably, the airflow formed along the front region of the operating platform has the same direction of flow as the airflow generated by the first air barrier device, so as to generate airflow in the lateral region of the operating platform. For example, the two airflows can be controlled in such a way that they are aligned with each other in the lateral region, thereby forming an enlarged, closed air barrier for the driver of the road construction machinery.

[0029] Specifically, the airflow formed in front of the operating platform can be oriented laterally to the direction of travel to laterally remove any air contaminated by aerosols and / or vapors from the front area of ​​the operating platform. In other words, contaminated air can thus be forced out of the driver's area from the side. This can further improve air quality within the operating platform area. To generate a substantially horizontal airflow oriented laterally to the direction of travel, nozzles at least partially mounted (preferably integrated therein) along the A-pillars can be used, for example. The airflow generated by the nozzle can extend laterally from the A-pillar with the nozzle into another A-pillar arranged laterally offset in the form of an air wall.

[0030] As an alternative to the horizontal airflow formed transversely to the direction of travel between the two A-pillars, an air wall generated in front of the operating platform can be formed by an upward directional airflow from the engine hood portion adjacent to the front area of ​​the operating platform. Specifically, such an airflow, preferably vertically upward directional, can carry away contaminated air upwards, transporting it away from the area above the operator.

[0031] One variant allows the airflow in front of the control platform to be formed as an air wall, directly behind the windshield along the direction of travel. The windshield thus avoids fogging and can also serve as a guiding geometry for the airflow. Furthermore, the air wall, extending substantially parallel to the windshield and formed directly behind it, has the advantage of not blowing directly onto the driver on the control platform.

[0032] Preferably, the second air barrier device has at least one nozzle arranged on a lateral deflector of the external control station for generating an air wall, and / or at least one nozzle arranged on the ceiling of the external control station for generating an air wall. On the lateral deflector of the external control station, the nozzle may be in the form of a substantially vertical blowrod to generate an air wall for shielding vapors and / or aerosols in the area adjacent to the external control station, the air wall being laterally deflected in the direction of travel. Preferably, the nozzle arranged on the ceiling of the external control station is arranged along a front support of the ceiling mounted transversely to the direction of travel, so as to form an air curtain oriented from top to bottom directly in front of the operator located below and on the side of the external control station.

[0033] According to the embodiments provided, the second air barrier device includes at least one nozzle disposed on the rear screed wall for generating an upward directional airflow, and / or at least one nozzle disposed below the screed walkway for generating an airflow oriented opposite to the direction of travel of the road construction machinery. These nozzles effectively supplement the air barrier generated by the second windbreak device on the side of the external control station, thereby additionally protecting the operator of the external control station from rising vapors and / or aerosols even when changing sides of the screed via the walkway attached to the rear wall of the screed. A key advantage of the nozzles disposed below the screed walkway is that the air barrier they generate can spread out like a carpet over the newly paved layer, thus keeping vapors and / or aerosols on the surface of the newly formed paved layer.

[0034] It is conceivable that nozzles arranged along the rear screed wall and / or below the screed walkway could generate airflow that could be dynamically adjusted based on distance measurements of subsequent compaction vehicles (e.g., road rollers). For example, if the distance to a subsequent compaction vehicle is measured to be short, the airflow generated through these nozzles could be automatically increased to better protect the driver of the subsequent compaction vehicle from rising aerosols and / or vapors.

[0035] Preferably, the first and / or second air barrier devices can be operated by a fan formed in the engine compartment of the road construction machinery to generate cooling airflow, and / or include at least one filter unit for cleaning the air conveyed therein. Thus, such a fan achieves a dual function: on the one hand, it generates cooling airflow to expel heat in the engine area; on the other hand, it can serve as a drive for the first and / or second air barrier devices.

[0036] Advantageously, the volumetric flow rate generated by the first and / or second air barrier devices can be dynamically changed based on the set and / or detected process parameters in the road construction machinery. For example, the first and / or second air barrier devices can be connected to a control device configured to dynamically control the speed of independent fan drivers or the aforementioned fans based on the temperature of the paving material.

[0037] Whether it is the nozzle of the first air barrier device and / or the second air barrier device, this can take the form of a rail or blower with multiple blowout openings. Therefore, the air wall generated in this way can be directly adapted as the visible boundary of the external working area available to the driver and / or operator of the external control station. Attached Figure Description

[0038] Advantageous embodiments of the invention will be explained in more detail with reference to the following figures.

[0039] Figure 1 A road construction machine according to the invention is shown, which is in the form of a road paver during paving operation;

[0040] Figure 2 A road construction machine according to the invention is shown, which is in the form of a material supply vehicle for a road paver;

[0041] Figure 3 A top view of a road paver is shown, featuring an air barrier area established adjacent to the operating platform and the external control station.

[0042] Figure 4 The protective canopy with a retractable canopy section is shown for the operator;

[0043] Figure 5A A schematic diagram of an external control station is shown, which has a roof and an air barrier device formed thereon; and

[0044] Figure 5B A schematic diagram of a supplementary air barrier device for an external control station is shown.

[0045] In all the accompanying drawings, the same components are indicated by the same reference numerals. Detailed Implementation

[0046] Figure 1 Road construction machinery, in the form of a road paver 1, is shown. The road paver 1 is configured to produce a paving layer 3 from paving material 2 in the direction of travel R. To produce the paving layer 3, the road paver 1 has a paving screed 4, the resulting paving width of which can be adjusted by an extendable extension unit 5. An external control station 6 for operator B is arranged in… Figure 1The extension unit 5 is shown. At the external control station 6, operator B can set and monitor the operating functions of the screed 4, especially the operating functions of the extension unit 5. The external control station 6 is attached to the lateral shifter 7. The lateral shifter 7 limits the width of the resulting paving layer 3.

[0047] Figure 1 The road paver 1 shown also has an operating platform 8 located below the protective cover 9. On the operating platform 8, the operator F of the road paver 1 can control and monitor the working process of the road paver 1.

[0048] Figure 1 The image further shows the driver F of the road paver 1 positioned on the driver's seat console 10, which is laterally rotated out of the area of ​​the operating platform 8, allowing the driver F to have a better view of the road paver 1 over the operation process, especially the filling level of the paving material 2 received in the hopper 11 in front of him.

[0049] exist Figure 1 In this process, paving material 2 is stored in hopper 11 up to the transverse hopper half 12. The paving material 2 stored in hopper 11, especially in the transverse hopper half 12, is conveyed backward by a longitudinal conveying device (not shown) against the travel direction R of the road paver 1 to the paving screed 4, and distributed in the transverse distributor pipe 13 along the direction of the extension unit 5 in front of the paving screed 4. Thus, during the paving journey of the road paver 1, the paving material 2 transversely distributed in front of the paving screed 4 and the extension unit 5 formed thereon is compacted into paving layer 3.

[0050] Figure 2 The diagram shows road construction machinery, in the form of a material supply vehicle 14. During material transport, the material supply vehicle 14 can move along the direction of travel R... Figure 1 The road paver 1 shown moves forward and supplies paving material 2 to its hopper 11. Figure 2 The feeder 14 shown has a hopper 15, which includes a transverse hopper half 16. During material transport, the paving material 2 is transported from the hopper 15 of the feeder 14 to the feed belt 17 via a longitudinal conveyor in the direction opposite to the travel direction R, and then fed into the hopper 11 of the road paver 1 that follows it.

[0051] Figure 2 The feeding trolley 14 shown has an operating platform 18, and the operating platform 18 is connected to... Figure 1 The operating platform 8 shown is structurally similar. Specifically, Figure 2 The feed trolley 14 in the middle may also have a driver's seat control console 19 that rotates outward for the driver F.

[0052] Figure 3 A schematic diagram of a road paver 1 is shown. The road paver 1 has a first air barrier device 20, which generates an air wall 22 in a region 21 located on the side of the operating platform 8. Through this air wall 22, rising vapors and / or aerosols D, particularly those from the hopper half 12, can be shielded to protect the driver F located in region 21 and can be conveyed to the side. This air barrier principle is... Figure 3 The display is shown in two adjacent horizontal areas of the operating platform 8.

[0053] exist Figure 3 The diagram shows a first air barrier device 22 comprising a nozzle 24 located within an A-pillar 23 to generate an air wall 22 at an angle α relative to the direction of travel R. Alternatively or additionally, an air wall for protecting the driver F within area 21 may also be generated by a nozzle 27 disposed on the front edge 25 of the extendable roof section 26 and / or by a nozzle 29 on the lower structure 28 of the extendable driver's seat console 10. On the other side of the road paver 1, a similar nozzle assembly may be present for generating the air wall 22 and / or another air wall within area 21.

[0054] Figure 3 Also shown is a B-pillar 50 for the roof guard 9, which is positioned behind the A-pillar 23 in the direction of travel R. An air wall 60 is blown out of the B-pillar 50 by a nozzle 51 mounted on the B-pillar 50, which, together with an air wall 22 blown further forward from the A-pillar 23, forms an air passage K for the driver F. Figure 3 The driver F shown is protected from the vapor and / or aerosol D rising from the hopper area in front of him, and from the vapor and / or aerosol D rising from the transverse distributor pipe 13 behind him.

[0055] As mentioned above, Figure 3 The first air barrier device 20 shown can be installed in a similar manner. Figure 2 On the feeding vehicle 14 in the middle.

[0056] Figure 3 A second air barrier device 29 is further shown, specifically associated with a lateral region 30 in the external control station 6, to generate an outflowing air wall 31 in that region at an angle β relative to the direction of travel R. The air wall 31 protects the operator B in the external control station 6 located within region 30 from vapors and / or aerosols D rising from the lateral distributor duct 13.

[0057] Figure 3 The second air barrier device 29 is further shown to generate an air wall 31 through a nozzle 32 located at the lateral shifter 7. Figure 3Further illustration shows a canopy 33 provided for operator B's use at the external control station 6 on the left side of the ironing board. Figure 3 On the canopy 33 shown, nozzles 35 are formed along the front edge 34 for forming a vertical air curtain oriented from top to bottom in front of operator B along the direction of travel R.

[0058] Figure 3 This shows that second air barrier devices 29 are formed on both the left and right external control stations 6. Furthermore, Figure 3 Another nozzle 37 is shown formed along the rear wall 36 of the ironing board to generate an upwardly oriented air wall 45 substantially along the set width of the ironing board (see...). Figure 5B The air wall 45 rises to serve as an air wall between the road paver 1 and the subsequent roller vehicle.

[0059] Figure 3 Further shown is an airflow 38 blowing behind the screed 4 in the opposite direction to the direction of travel R, which covers the resulting paving layer 3 in the form of an air carpet.

[0060] Figure 4 It shows that it can be used Figure 1 The road paver 1 has a canopy 9 with an extendable canopy section 26. The canopy 9 can also be used for... Figure 2 The feeding cart 14 is shown. Figure 4 In the middle, the headliner section 26 is in an extended position. For example, the extension of one of the two headliner sections 26 occurs automatically in response to the outward rotation of the driver's seat control console 10, 19 located below it. Air flows downward at the front edges 25 of the two headliner sections 26 to form an air wall for the driver F within area 21 (see...). Figure 3 ).also, Figure 4 This illustrates an airflow directed from the top and bottom along the outer edge 39 of the canopy section 25. In this way, the driver F, located below, can be protected within the air chamber from the vapors and / or aerosols D rising from the hopper area.

[0061] Figure 5A A schematic diagram of the paving screed 4 as viewed from the rear along the direction of travel R is shown. The paving screed 4 has an extension unit 5 and an external control station 6 disposed thereon, the external control station 6 having a canopy 33. Airflow 40 flows from the canopy 33, from above, and from nozzles 35 located below in front of the operator B. Figure 5A A vertically mounted nozzle 41 is also shown for blowing out a side-directed airflow 42 that blows vapors and / or aerosols laterally away in front of operator B.

[0062] Figure 5BAnother nozzle 44 is shown schematically below the walkway 43 attached to the rear wall of the screed 36. The nozzle 44 is adapted to generate an airflow 38 oriented in the opposite direction of travel R directly above the paving layer 3 below the walkway 43 to cover vapors and / or aerosols D rising from the paving layer 3.

[0063] The first air barrier device 20 and / or the second air barrier device 29 shown in the figure can be positioned directly above the chassis of the road paver 1 or the material supply vehicle 14. Figure 1 and Figure 2 The engine compartment openings 46 and 46' shown are for air intake.

Claims

1. Road construction machine, in the form of a road paver or a feed vehicle for a road paver, comprising at least one operator platform for a driver of the road construction machine and / or an external control station for an operator of the road construction machine, at least one first air barrier device for the driver of the road construction machine and / or at least one second air barrier device for the operator of the external control station of the road construction machine and a hopper arranged in front of the operator platform in the direction of travel (R) and having a lateral hopper half for receiving paving material, characterized in that From above, the first air barrier device is adapted to generate at least one directional airflow in the form of an air wall extending in a laterally present and adjacent area of the operating platform and / or the second air barrier device is adapted to generate at least one directional airflow in the form of an air wall extending in a laterally present and adjacent area of the outer control station.

2. The road construction machine according to claim 1, characterized by The air wall generated by the first air barrier device and / or the second air barrier device is adapted to be an air wall intersecting the direction of travel (R) of the road construction machine.

3. The road construction machine according to claim 1, characterized by, The first air barrier device comprises at least one nozzle arranged on a roof segment extendable transversely to the direction of travel (R), at least one nozzle arranged on a driver's seat console laterally rotatable out of the operating platform, at least one nozzle arranged on an A-pillar of a roof structure, and / or at least one nozzle arranged on the hopper half for generating the air wall.

4. The road construction machine according to claim 3, characterized by The first air barrier device nozzles are integrally formed on an assembly of the extendable roof segment, on a lower structure of the driver's seat console or on a fall protection device, in the A-pillar, and / or in an upper edge of the hopper half.

5. The road construction machine according to claim 1, characterized by The first air barrier device or at least one fan device supporting the first air barrier device is adapted to generate at least one directional airflow in the form of an air wall at least partially along a front area of the operating platform in relation to the direction of travel (R).

6. The road construction machine according to claim 1, characterized by The second air barrier device comprises at least one nozzle arranged on a side shifter of the outer control station for generating the air wall and / or at least one nozzle arranged on a roof of the outer control station for generating the air wall.

7. The road construction machine according to claim 1, characterized by The second air barrier device comprises at least one nozzle arranged at a rear screed wall for generating an upwardly directed airflow and / or at least one nozzle arranged under a screed walkway for generating an airflow directed opposite to the direction of travel (R) of the road construction machine.

8. The road construction machine according to claim 1, characterized by The road construction machine comprises at least one side engine compartment opening for drawing in air for the first air barrier device and / or the second air barrier device.

9. The road construction machine according to claim 1, characterized by The first air barrier device and / or the second air barrier device can be operated by a fan formed in an engine compartment of the road construction machine to generate a cooling airflow and / or comprise at least one filter unit arranged in the engine compartment for cleaning the air conveyed thereby.

10. A road construction machine according to any one of the preceding claims, characterized in that, The volume flow generated by the first air barrier device and / or the second air barrier device can be dynamically changed depending on settings and / or detected process parameters in the road construction machine.

11. Method for generating an air flow during operation of a road construction machine in the form of a road paver or a supply vehicle for a road paver, characterized in that From above, the first air barrier device of the road construction machine generates at least one directional airflow in the form of an air wall extending in a laterally present and adjacent area of an operating platform of the road construction machine and / or the second air barrier device is adapted to generate at least one directional airflow in the form of an air wall extending in a laterally present and adjacent area of an outer control station of the road construction machine.

Images