JP2018040243A - Road paver with spraying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve surface quality of substructure layers in road construction.SOLUTION: The invention relates to a road paver 1 that comprises a tractor 2 with a material hopper 5 and a machine frame 4. The machine frame 4 is pivotably connected to a paving screed 3 by pulling arms 6 and a material spreading auger is disposed in a gap 7 between the tractor 2 and the paving screed 3. A longitudinal conveyor device 22 extends through a tunnel 26 between the material hopper 5 and the gap 7. The road paver 1 according to the invention is characterized by a spraying device that is configured for injecting a liquid into the gap 7 between the tractor 2 and the paving screed 3, into the tunnel 26, or into the material hopper 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a road paving machine according to the preamble of claim 1.

  Road paving machines are mainly used for road construction. In road construction, road paving machines are used to spread, level and compact various types of bulk materials. The bulk material may be, for example, an asphalt mixture. However, the materials used for the foundation structure that supports the various asphalt layers of the road can also be diffused, leveled and compacted by road paving machines.

  After leveling with a road paving machine or a grader, the base structure may be moistened from above by a tank vehicle equipped with a sprinkler system. This requires that the vehicles have access to the underlying structure. Thereafter, compaction with a roller can be performed. Since the underlying structural material is often a non-hard bulk material, that is, a bulk material that does not contain a binder, running on the underlying structure degrades the surface quality of the underlying structure, resulting in completion. The quality and stability of the road will also deteriorate.

  An object of the present invention is to improve the surface quality of the foundation layer in road construction.

  In the present invention, the above object is solved by a road paving machine having the features of claim 1. Further preferred developments are indicated in the dependent claims.

  The road paving machine according to the invention comprises a tractor having a material hopper and a machine frame, the machine frame being pivotally connected to the paving screed by a traction arm. A material diffusion auger is disposed in the gap between the tractor and the paved screed. The conveying device extending in the front-rear direction extends through a tunnel between the material hopper and the gap. The road paving machine according to the invention is characterized in that it comprises a spray device, which sprays the liquid in the gap between the tractor and the paved screed, in the tunnel or in the material hopper. Is attached. For this reason, the bulk material of the base structure can be moistened before leveling or before compacting if compacting is performed, so that the compaction roller vehicle for finishing runs on the formed base structure. This eliminates the need for additional vehicles to travel. A further advantage of spreading the liquid in the gap between the tractor and the paving screed is that the liquid is mixed with the paving material, thereby ensuring a more uniform water distribution in the underlying structure. In addition, dust floating is suppressed. In the context of the present invention, spraying or jetting shall be understood as diffusing liquid. In this process, vaporization and spraying can be carried out, but these are not indispensable for carrying out the present invention. The spraying process or spraying process in the present invention also means that the liquid flows out from, for example, the end of the pipe (tube end). The liquid may be water, for example.

  The spreading device is preferably arranged in the gap. Thereby, the path | route which a liquid moves to the destination (destination) which should be delivered from a dispersion device can be shortened, and the loss of the liquid by vaporization can be avoided, for example.

  The spreading device can also be fixed to a machine frame or a paving screed. However, it is likewise conceivable to fix the spreading device to at least one of the traction arms or to a fixing device arranged to connect the paving screed to the traction arm.

  The dispensing device preferably comprises one or more outlet devices through which the liquid selectively flows out. In particular, in the case where a plurality of outlet devices are provided, the liquid is allowed to flow out from only one outlet device among these outlet devices or from a plurality of outlet devices among these outlet devices as required. Can be advantageous. Specifically, as described in more detail below, the outflow direction and outflow amount of the outflowing liquid can be adjusted per unit time.

  It is particularly preferred that each outlet device comprises an adjusting element configured to variably adjust the liquid outflow from each outlet device. As a result, the liquid flow or the plurality of liquid flows can be adjusted more accurately as required. The adjustment element can be operated manually or automatically and can be actuated mechanically or electrically. Furthermore, the adjustment element can be remotely controlled, can be operated directly on the adjustment element, or both. The adjustment element and / or the plurality of adjustment elements can be, for example, one or more ball valves. The outlet device can comprise, for example, one or more spray nozzles, tongue nozzles or vaporizers. One or more tube ends can also be provided.

  The spreading device can preferably comprise one or more connecting devices. For example, a connecting device can be provided on each side of the spraying device.

  The spraying device can be provided with an inflow device. This inflow device enables or facilitates the supply of liquid to the spraying device. For these purposes, the inflow device can be connected to the spraying device, for example via a coupling device or one of a plurality of coupling devices. The inflow device can comprise a supply line, for example. The inflow device can extend from the spraying device to various locations on the road paving machine, thereby providing a liquid supply such as a water tap, a tank truck, or a liquid supply or on-board liquid reservoir for a road paving machine It becomes easy to connect the spraying device.

  Advantageously, the inflow device is removably fixed to the spraying device. In this way, it is determined whether the inflow device is necessary or useful, or where the inflow device is necessary or useful, and the liquid supply part is directly connected to the spraying device, for example through the coupling device, ie the inflow It is also possible to connect without using a device.

  It is particularly advantageous if an adjusting part is provided for variably adjusting the liquid flow to the spraying device. This makes it possible to adjust until the liquid flow to the spraying device is completely blocked. This is advantageous in that adjustment at the individual outlet device is possible. The adjustment unit may be a valve or a variable flow controller, for example. The adjustment unit may be provided instead of the adjustment element, or may be provided in addition to the adjustment element.

  Various modifications are possible for the arrangement of the adjustment unit. For example, it is conceivable to arrange the adjusting unit in at least one of the inflow device and the spraying device. An arrangement in which the adjusting portion is provided between the inflow device and the spraying device is also possible. For example, the adjusting part can be provided at the end of the inflow device opposite to the spraying device, or can be provided at the end of the inflow device on the spraying device side.

  The adjustment unit is preferably electronically controllable. This automatically activates, deactivates or adjusts the liquid flow according to various parameters. Examples of such parameters include, for example, the operation of the drive main switch, the speed of various conveying devices such as material diffusion augers and so-called scraper belts that can be provided in road paving machines, or the amount of material such as ultrasonic sensors or paddle sensors. The state of a sensor is mentioned. In addition to electronic control or instead of electronic control, it is conceivable to perform hydraulic control or pneumatic control of the adjusting unit. This enables or facilitates the automation described above.

  In a further variation, the adjustment unit may comprise a variable flow controller for adjusting the liquid flow.

  It is further advantageous if the adjustment element can be controlled electronically regardless of the control of the adjustment part. This automatically activates, deactivates or adjusts the liquid flow according to various parameters. Examples of such parameters are the operation of the drive main switch, the speed of various conveying devices such as material diffusion augers and so-called scraper belts that can be provided in road paving machines, or the amount of material sensors such as ultrasonic sensors or paddle sensors. States. In addition to electronic control or instead of electronic control, it is conceivable to perform hydraulic control or pneumatic control of the adjusting unit. This enables or facilitates the automation described above.

  In a further variation, the adjustment element may comprise a variable flow controller for adjusting the liquid flow.

  It is conceivable to arrange a spraying device between the two pulling arms. Such an arrangement is particularly advantageous for stationary non-stretchable pavement screeds. In a screed that can be widened by means of a telescoping screed or a rigid widening part, the widened portion can be attached to the spraying device, and specifically, can be attached by one or a plurality of connecting devices described above. The widening part may comprise one or more further outlet devices corresponding to the outlet device of the spreading device. The widened portion may not be provided between the two traction arms, and may be provided beside one of the traction arms. It is also possible for the widened portion to extend laterally beyond the width of the tractor. The widened portion preferably has a variable width, for example by an extension device.

  The present invention relates to a road paving machine as described above. Hereinafter, embodiments will be described in more detail with reference to the accompanying drawings.

It is a perspective view which shows the conventional road paving machine. It is a figure which shows a part of road paving machine provided with the spraying device based on this invention in detail. 1 is a perspective view showing a spraying device according to a first embodiment of the present invention. It is a perspective view which shows the spraying apparatus which concerns on the 2nd Embodiment of this invention. FIG. 6 is a schematic diagram showing various components provided to control the amount of liquid dispensed by the dispensing device in an open loop or closed loop. It is a perspective view which shows the road paving machine which concerns on another embodiment of this invention. It is a figure which shows a part of road paving machine provided with the spraying device which concerns on another embodiment of this invention in detail.

  FIG. 1 shows a road paving machine 1 known from the prior art. The road paving machine 1 includes a tractor 2 and a paving screed 3 disposed on the rear side in the traveling direction of the tractor. The tractor 2 includes a machine frame 4 and a material hopper 5 that can be fixed to the machine frame 4. In the region of the material hopper 5, for example a longitudinal conveying device is provided which can be provided with one or two scraper belts 22. The front-rear transport device extends through a tunnel 26 between the material hopper 5 and the gap 7. The pavement screed 3 is pivotally attached to the machine frame 4 by a traction arm 6. The gap 7 is provided between the tractor 2 and the paved screed 3. For the sake of brevity, the reference numerals used for the above parts are also used for the following description of the road paving machine according to the present invention.

  FIG. 2 is a diagram showing in detail only the parts selected as the road pavement machine 1 according to the present invention to show the outline of the present invention well. Of the components described above, in particular the traction arm 6 is shown. A gap 7 provided between the tractor 2 and the paved screed 3 is also shown. Since only the selected part is shown, it can be seen that a material diffusion auger 8 is provided in the gap 7. Similarly, a fixing device 9 attached to connect the pavement screed 3 to the traction arm 6 is also shown. In the present embodiment, a spraying device 10 is provided. For example, the spraying device 10 can be provided in the gap 7. The spraying device 10 is connected to the inflow device 12 via the coupling device 11. A connecting piece 13 is provided at the end of the inflow device 12 opposite to the spraying device 10. The connecting piece 13 can be attached to connect to the liquid supply unit. The liquid supply unit can be, for example, a water faucet, a tank truck, or a liquid tank mounted on the road paving machine 1.

  FIG. 3 shows the spraying device 10. In this embodiment, it is clear that the spraying device 10 includes two coupling devices 11a and 11b. In this embodiment, although the connection apparatus is arrange | positioned at the both ends of the spraying apparatus 10, it can also be provided in a different location according to an attachment condition. In the present embodiment, only one inflow device 12 is provided, and this inflow device 12 is connected to the first coupling device 11a. The second connecting device 11 b is closed by the closing body 14. An embodiment in which a plurality of inflow devices 12 are provided and connected to the plurality of coupling devices 11 is also possible in the present invention.

  In the present embodiment, an adjustment unit 15 is provided. The adjusting unit 15 is used to variably adjust the fluid flow to the spraying device 10. As an example of a suitable arrangement for this purpose, FIG. 3 shows the adjusting part 15 arranged between the spraying device 10 and the inflow device 12. Alternatively, for example, the adjustment unit 15 can be provided at the end of the inflow device 12 opposite to the spraying device 10.

  In the present embodiment, six outlet devices 16 are provided, but this number is merely an example and can be appropriately changed according to the application. In order to variably adjust the liquid flow leaving each outlet device, each outlet device 16 is provided with one adjusting element 17. This adjustment element may be a ball valve, for example, as shown in FIG. Further, the outlet device 16 of the above-described embodiment includes a diffusion element 18. The diffusing element can be configured to diffuse the liquid flow exiting each outlet device 16 or to direct the liquid flow in a particular direction. In the illustrated embodiment, tongue-type nozzles are shown as an example of the diffusing element 18, and this tongue-shaped nozzle provides not only the diffusion of the liquid flow but also the directing of the liquid flow. sell. However, the diffusion element 18 may be other elements such as a spray nozzle, a vaporizer, or a simple pipe end.

  FIG. 4 shows a spraying device 10 according to another embodiment. A widening portion 19a is attached to the connecting device 11a, and a widening portion 19b is attached to the connecting device 11b. As shown in FIG. 4, each of these widened portions can include one branch portion 20a, 20b. The inflow device 12 can be connected to the first branch portion 20a of the first widened portion 19a. The second branch portion 20b of the second widened portion 19b is closed by the closing body 14. However, it is also possible to attach the second inflow device 12 to the second branch portion 20b. An exit device 16 may be provided in the widened portions 19a and 19b. This outlet device can have the same structure as the outlet device 16 described for the first embodiment. The outlet device may have the same structure as the outlet device 16 provided in the spraying device 10, or may be configured differently.

  In this embodiment, both the adjusting unit 15 and the adjusting element 17 are shown as simple ball valves. However, it should be understood that this is only an example. Any device can be used as long as it is suitable for variably adjusting the flow rate per unit time of the liquid flowing through each part. Specifically, a valve configured to change the cross-sectional area of the flow is conceivable. Further, for example, the adjustment element 17 may include the variable flow controller 17a, or the adjustment unit 15 may include the variable flow controller 15a, or both. Furthermore, a device that performs variable pulse operation that can vary the number of spray pulses per unit time, or a device that changes the pressure in each tube may be used.

  The flow rate per unit time can be adjusted, for example, mechanically, electromechanically, hydraulically or pneumatically. It is also conceivable to adjust at least one of the adjustment element 17 and the adjustment unit 15. In addition, or alternatively, remote operation is possible. Particularly preferred are electromechanical actuation, hydraulic actuation or pneumatic actuation which can be activated or carried out remotely by the control unit 21 (see FIG. 5). The control unit 21 here may be any of an electronic type, a hydraulic type, or a pneumatic type control unit. The control may include a closed control loop or an open control loop.

  The operation can be performed automatically according to various parameters of the road paving machine. Examples of such parameters include the operation of the drive main switch 23, the speeds of various conveying devices of the road paving machine 1, such as the material diffusion auger 8 or the scraper belt 22, and the like at various locations in the road paving machine 1. There are one or more output signals from one or more material quantity sensors 24 (see FIG. 5) provided to sense the amount of material.

  FIG. 5 schematically shows an example of a possible embodiment for the operation of at least one of the adjustment element 17 and the adjustment part 15. At least one of the adjustment element 17 and the adjustment unit 15 operates in consideration of the input information 25. The input information 25 is understood as a parameter that can be considered in the automatic operation of at least one of the adjustment element 17 and the adjustment unit 15, and the parameters described in the previous paragraph are exemplarily shown in FIG.

  It should be clarified that not all of the input information 25 shown at the top of FIG. 5 needs to be considered. Only one or more input information of the input information 25 may be considered during the operation of at least one of the adjustment element 17 and the adjustment unit 15. Similarly, as another example, only the adjustment element 17 may be operated by the control unit 21, according to one or a plurality of pieces of input information 25, or both. It should also be clarified that only part 15 may be activated.

  FIG. 6 shows a road paving machine 1 according to another embodiment of the present invention. This road paving machine comprises a spreading device 10 configured to inject liquid into the material hopper 5. The spreading device 10 is fixed to the machine frame 4. Also in this embodiment, the spreading device 10 comprises a plurality of outlet devices 16. The outlet device 16 can have the same structure as the outlet device 16 described for the first and second embodiments.

  FIG. 7 is a diagram showing in detail a road paving machine 1 according to still another embodiment of the present invention. A broken line indicates that the spraying device 10 is disposed in the tunnel 26. The sprinkler is configured to inject liquid into the tunnel 26 and in particular to the material being conveyed through the tunnel 26. Also in this embodiment, the spreading device 10 comprises a plurality of outlet devices 16. The outlet device 16 can have the same structure as the outlet device 16 described for the first and second embodiments. Alternatively, the spraying device 10 may be arranged outside the tunnel 26 so as to eject the liquid into the tunnel 26.

Claims (15)

It comprises a tractor (2) with a material hopper (5) and a machine frame (4), said machine frame (4) being pivotally connected to the pavement screed (3) by a traction arm (6) And a material diffusion auger (8) is provided in the gap (7) between the tractor (2) and the paved screed (3), and a longitudinal conveying device (22) is connected to the material hopper (5) and the gap. A road paving machine (1) extending through a tunnel (26) to and from (7),
A spraying device configured to inject liquid into the gap (7), the tunnel (26) or the material hopper (5) between the tractor (2) and the paved screed (3) ( A road paving machine (1), characterized in that it comprises 10).   The road paving machine according to claim 1, characterized in that the spreading device (10) is provided in the gap (7).   The road pavement machine according to claim 1 or 2, characterized in that the spraying device (10) is fixed to the machine frame (4) or the pavement screed (3).   The spreading device (10) is connected to at least one of the traction arms (6) or to a fixing device (9) configured to connect the paved screed (3) to the traction arms (6), The road paving machine according to claim 1, wherein the road paving machine is fixed.   Road pavement according to any one of the preceding claims, characterized in that the spraying device (10) comprises one or more outlet devices (16) through which the liquid selectively flows out. machine.   6. The outlet device (16) according to claim 5, characterized in that each outlet device (16) comprises a regulating element (17) configured to variably regulate the liquid flow from the outlet device (16). Road paving machine.   An adjustment element (17) configured to variably adjust the liquid flow to the group of outlet devices (16) is provided, the group including at least two of the outlet devices (16). The road paving machine according to claim 5, wherein   The road paver according to any one of claims 1 to 7, characterized in that the spraying device (10) is provided with an inflow device (12).   The road paver according to claim 8, characterized in that the inflow device (12) is detachably fixed to the spraying device (10).   The road pavement machine according to any one of claims 1 to 9, characterized in that an adjustment unit (15) for variably adjusting the liquid flow to the spraying device (10) is provided.   The road pavement machine according to claim 10, wherein the adjustment part (15) is provided in at least one of the inflow device (12) and the spraying device (10).   The road paving machine according to claim 10 or 11, characterized in that the adjusting part (15) is provided between the spraying device (10) and the inflow device (12).   The road paving machine according to any one of claims 10 to 12, characterized in that the adjustment part (15) is electronically controllable.   The road paving machine according to any one of claims 10 to 13, wherein the adjusting unit (15) includes a variable flow controller (15a) for adjusting the liquid flow.   The road paver according to any one of claims 1 to 14, characterized in that the spreading device (10) is arranged between the two traction arms (6).