WO1999055969A1 - Device for treating roads - Google Patents

Abstract

The invention relates to a device for treating roads, comprising an automotive chassis which carries an engine frame (1), a driving motor for driving the working devices (8) and for operating the inventive device, a reservoir (14) for the material to be dispersed, said reservoir being attached to the engine frame (1), and a metering and discharging device (10) for the material to be dispersed, this device being connected to the reservoir (14). According to the invention, the reservoir (14) has a discharge element (15) which in itself extends across the width of the engine frame (1), the metering and discharging device (10) is located in or above the discharge element (15) and a device for adjusting the width over which the material is dispersed (30) is situated between the reservoir (14) and the metering and discharging device (10).

Description

Device for processing road surfaces

The invention relates to a self-propelled device for processing lanes according to the preamble of claim 1.

Road construction machines of this type have a storage container for spreading material fastened to the machine frame, the discharge of which can be coupled to a metering and discharge device. With the help of the storage container and the dosing and discharge device, spreading material, namely, for example, granules, grit, powdered spreading material, binder, lime or cement can be distributed on the road.

Discharge devices for grit are also used in construction machines for material processing (recyclers), namely, for example. for stabilizing insufficiently stable soils, for pulverizing hard asphalt surfaces and recycling of bound or unbound road surfaces. - 2 -

Known road construction machines (WO 96/24725) usually have a work roll rotating in a work chamber, which is generally arranged to be adjustable in height and inclination in order to adapt to the surface to be worked.

The necessary processes take place in this working chamber, adapted to the respective application, e.g. Detaching and crushing the milled road material, adding binders, mixing and distributing added materials, etc.

Such machines are often used for soil stabilization and / or mortaring, i.e. used to increase the load-bearing capacity of poorly loadable floors or to create a hydraulically bound base layer. The process is based on mixing the soil with hydraulic binders (lime, cement (suspension), emulsion, etc.), which binds the moisture. Then the surface can be leveled using a grader and compacted using a roller.

The milling of the soil and simultaneous mixing with the binder is usually carried out with a so-called soil stabilizer, which has a milling / mixing rotor for this. As a rule, the binder is applied to the ground beforehand using a separate spreading vehicle. However, this is only possible on a relatively flat, easily navigable surface, since the spreading vehicles are usually built on the base of a three-axle truck and are therefore not very suitable for off-road use. In addition, with this method the time between the sprinkling and the milling in is relatively long, which favors a possible blowing away of the binder and a strong development of dust. - 3 -

Cement can also be added as a suspension (dissolved in water) for dust-free addition. However, this method can only be used if additional water is to be introduced into the soil. This method is not suitable for soils that already have too high a water content. In addition, the suspension mixer must be pushed or pulled in front of or behind the machine, which in turn is only possible in relatively flat terrain.

With road construction machines there is often the problem of distributing the spreading material evenly over the entire working width of the machine. Often, however, it is also desirable to provide the spreading material only in a certain section of the working width. For this purpose, it is necessary to send a spreading vehicle in front of the road construction machine, which is disadvantageous in particular in the case of powdered spreading material.

The invention has for its object to develop a device of the type mentioned in such a way that the distribution of spreading material is made possible in a selectable spreading width.

The features of claim 1 serve to achieve this object.

The invention advantageously provides that the storage container has a discharge extending transversely to the direction of travel of the machine frame, that the metering and discharge device is arranged in or below the discharge, and that a spreading width adjustment device is arranged between the storage container and the metering and discharge device is. - 4 -

The arrangement of a spreading width adjustment device between the storage container and the metering and discharge device has the advantage that the spreading width or the position of the spreading track can be variably adjusted within the entire working width of the device and can be set differently as required during the working process.

All the blocking elements of the spreading width adjustment device are arranged inside the discharge both in the open position and in the closed position and are sealed off from the outside. In this way, the susceptibility to failure of the spreading width adjustment device is reduced by preventing the blocking elements from becoming dirty and sticking together.

The spreading width adjustment device preferably consists of a plurality of separately controllable locking segments arranged side by side in the width direction. In this way, the spreading width adjustment device can be operated in segments.

In a preferred embodiment, it is provided that the locking segments consist of at least one pivotable flap. The pivotable flaps can partially close the discharge of the storage container in the direction of the working width of the device, the flaps being pivoted into a vertical position in the open position and into an almost horizontal position in the closed position. When the flaps are pivoted about an "axis parallel to the working direction, the free ends of the flaps can partially overlap. It is preferably provided that a plurality of flaps are coupled to one another and can be pivoted together. The flaps which can be pivoted together form a locking segment which can be controlled, for example, by means of a single adjusting device.

Several locking segments can also be adjustable together.

The dosage is regulated purely volumetrically or additionally taking into account the mass actually discharged. The purely volumetric metering regulates the speed of the cellular wheel lock as a function of the current driving speed. One revolution of the rotary valve corresponds to a precisely defined, unchangeable volume flow in liters / revolution. In addition, the storage container for the spreading material can be hung on load cells. The speed is then regulated on the basis of the mass of the spreading material actually discharged in kg.

The storage container can be filled pneumatically in the case of powdered grit, the grit e.g. Binder is blown into the container. The forcibly generated exhaust air is cleaned in an exhaust air filter before it is released into the environment.

Several filling level sensors continuously check the filling quantity. When the fill level falls below a certain amount, vibrating vibrators located in the storage container are switched on, which loosen the powdery scattering material still stuck to the walls and cause it to slide off. If the level falls below the lowest level, a warning signal is activated. - 6 -

In the case of a road construction machine for stabilizing and / or recycling poorly stable soil, a complete metering and application device for powdered binders with a storage container and a spreading width adjustment device is integrated. This means that the binding agent can also be applied wherever a soil stabilizer can work. In order to minimize the risk of drifting or dust formation, the storage container and discharge device are arranged in the working direction directly in front of the milling drum. The time the binder remains on the surface of the soil before it is gripped by the milling drum is thus limited to a few seconds. In addition to the hood of the milling drum, the metering and application unit is sealed off from the floor with flexible walls.

Because not only the discharge unit, but also the storage container is arranged between the chassis axes directly in front of the roller, no additional conveying devices (screws, etc.) are required. In addition, this arrangement favors the weight distribution and the load acting on the milling drum.

Further features and advantages of the invention result from the exemplary embodiment of a device according to the invention described below.

Show it:

Fig. 1 is a schematic side view of a device according to the invention. 2 shows a cross section through the discharge of the storage container with a spreading width adjustment device and a metering and discharge device,

3 shows the flap adjustment for the spreading width adjustment device,

4 shows a side view of the metering and discharge device combined with a spreading width adjustment device, and

Fig. 5 is a plan view of the spreading width adjustment device.

1 shows a recycler for processing lanes with a machine frame 1 carried by two running gears and a driving station consisting of a driver's cab 23. The driver's cabin 23 can be moved on the machine frame 1 transversely to the direction of travel.

The bogies have two jointly or optionally individually steerable bogie axles 4 at the front and rear ends of the machine frame 1, in which each wheel 6 is provided with its own hydraulic drive in the form of a hydraulic motor and, if necessary. can be controlled separately. Each wheel 6 is provided with a height adjustment device 25, so that the height of the machine frame 1 and possibly its inclination can be adjusted exactly to the working or transport height. The entire machine weight is thus concentrated on the area between the chassis axles 4, a hood 7 being fixed in place beneath the driver's cab to the machine center, which serves as a mixing area of a working area of a rotating working area that is height-adjustable relative to the machine frame 1. roller 8, for example a milling drum limited.

The recycler has a storage container 14 for the spreading material 5, for example binding agent, attached to the machine frame 1, and a metering and discharge device 10 provided with a spreading width adjustment device 30, which is designed in the form of a cellular wheel sluice 11. The storage container 14 extends between the driver's cabin 23 and the hood 7 of the work roll 8 and is fastened to the machine frame 1. Powdered grit 5 can be filled pneumatically into the storage container 14. At the upper end, the storage container 14 is provided with an exhaust air filter 26, so that when the storage container 14 is filled pneumatically, no dust can escape to the outside. The walls 20 of the storage container 14 can run in a funnel shape. At the lower end of the storage container 14, the cellular wheel lock 11 is located in a discharge 15, with which the spreading material 5 can be dispensed in a metered manner. The spreading material 5 or binding agent is discharged depending on the rate of advance of the machine with the aid of a computer control. The rotary valve 11 is connected to a hydraulic motor 12 via a gear 16. Below the rotary valve 11 there are flexible sealing walls 18, for example made of rubber mats, which seal the discharge 15, which preferably extends over the entire width of the machine, against the floor 2. The sealing walls 18 are open towards the hood 7, so that the spreading material / binder 5 dispensed in a metered manner from the discharge 15 is deposited flat on the floor 2 within the body enclosed by the sealing walls 18. The spreading material / binder 5 is then run over by the work roll 8 immediately after distribution and mixed with the milled bottom 2. This way no cement or - 9 -

Lime dust escapes, causing the binder 5 to be in powder form, i.e. can be integrated without water.

Level sensors 24 on the walls 20 of the storage container 14 give signals to the control, wherein these signals can also be used to control vibration vibrators 22, which are also arranged on the walls 20 of the storage container 14.

The control of the cellular wheel sluice 11 can, in addition to the control as a function of the speed of advance, also experience a fine control in such a way that a weighing device (not shown in detail) detects the amount of spreading material that has been discharged and corrects the speed of the cellular wheel sluice 11 accordingly. The weighing device can consist, for example, of load cells arranged below the storage container 14.

The previous description referred to a recycler with an integrated storage container 14 for spreading material 5 with a spreading width adjustment device 30 and a metering and application device 10. It is understood that other road construction machines with a storage container 14, a spreading width setting device 30 and a metering and application device 10 can be provided without a work roll 8. The following detailed description of the spreading width adjustment device therefore also relates to the application of the spreading width adjustment in road construction machines that are not recycling machines.

The in the Fig. 2. The spreading width adjustment device 30 shown to 5 is preferably in between the metering and discharge device 10 and the storage container 14 - lo ¬

dern discharge 15 of the reservoir 14 is arranged.

2 shows only the funnel-shaped discharge 15 of the storage container, in which the metering and discharge device 10 consisting of a cellular wheel sluice 11 is arranged at the lower end. The cellular wheel sluice 11 is arranged between two mutually parallel vertical walls 17 of the discharge 15 and extends preferably over the entire working width of the machine frame 1. Above the cellular wheel sluice 11, the spreading width adjustment device 30 is also arranged between the vertical walls 17. The spreading width adjustment device 30, as can best be seen from FIG. 4, is formed from a plurality of blocking segments 32. As shown in Figs. 4 and 5, the blocking segments 32 are not arranged over the entire width of the cellular wheel lock 11. An area without locking segments can be provided in the middle of the cellular wheel sluice 11. The width of the area that cannot be blocked can be, for example, 500 mm. Both sides of the non-lockable area are in the exemplary embodiments of FIGS. 4 and 5, four locking segments 32 are provided, each locking segment 32 being able to be adjusted with the aid of a piston-cylinder unit 35, 36. The width of a blocking segment 32 can be, for example, 250 mm.

A valve control device 44 enables the individual or combined activation of the blocking segments 32 via the piston-cylinder units 35, 36.

Fig. 3 shows two juxtaposed locking segments 32 in different pivot positions. By actuating the piston-cylinder unit 35, 36 a two-armed - 11 -

Swivel lever 38 pivoted, with the help of which three flaps 34 can be pivoted simultaneously and synchronously by approximately 90 °. In the case of the figures 3 to 5 shown embodiments, the leg axes of the flaps 34 are parallel to the working direction of the machine. The division of a locking segment 32 into a plurality of pivotable flaps 34 has the advantage of requiring only a small overall height and depth, so that the spreading width adjustment device 30 can be combined with a metering and discharge device 10 without difficulty, without the length and / or width of the machine to enlarge. As can be seen from FIG. 3, the flaps can partially overlap one another in the almost horizontal closed position. Here, the axle shaft 50, which is connected to the flap 34 in a rotationally fixed manner, can be arranged asymmetrically relative to the flap 34, i.e. that the flap 34 protrudes unevenly on both sides of the axle shaft 50.

The two-armed pivot lever 38 actuated by the piston 35 first pivots the central flap 34 of a locking segment 32 and furthermore displaces a coupling member 40 which is articulated on the free arm of the two-armed pivot lever 38. The coupling member 40 is coupled at its ends to two further pivot levers 42, which serve to pivot the outer flaps 34 via their axle shafts 50.

It is understood that the coupling member can also be connected to more than two pivot levers 42, for example in order to pivot five flaps 34 simultaneously and parallel to each locking segment 32.

The coupling member 40 consequently enables the synchronous and parallel pivoting of all the flaps 34 of a blocking segment. - 12 -

tes 32

On the right side of FIG. 3, the adjacent blocking segment 32 is shown in the open position, in which the flaps 34 stand vertically and thereby release the passage cross section of the discharge 15.

The figures 4 and 5 show a total of eight locking segments 32, of which only the locking segment 32 located on the left edge is pivoted into the locking position. The flaps 34 extend over the entire opening cross section of the discharge 15 between the walls 17. The discharge 15 is connected to the storage container 14 via the flange 19. As can be seen from FIG. 2, the pivot axes of the flaps 34 defined by the axle shafts 50 and the axle stubs 48 run parallel to the working direction of the machine. The axle shafts 50 and the stub axles 48 are held in bearings 46 on the outside of the walls 17, the axle shafts 50 being guided outwards through the wall 17 and being connected in a rotationally fixed manner to the swivel levers 38. Furthermore, the piston-cylinder units 35, 36 are also attached to the outside of the discharge 15.

A fill level sensor 24 is arranged in the region of the funnel-shaped section of the discharge 15.

At the lower end of the discharge 15, below the cellular wheel sluice 11, the already described flexible wall 18 is flanged, which can for example consist of a rubber material and seal the discharge in the working direction and on the side.

Claims

- 13 patent claims 1. Device for processing roadways, with a self-propelled chassis, which carries a machine frame (1), with a drive motor for driving work equipment (8) and driving, and with a storage container attached to the machine frame (1) ( 14) for grit (5) and a metering and discharge device (10) connected to the storage container (14) for the grit (5), characterized in that the storage container (14) extends transversely to the direction of travel of the machine frame (1) (15) that the dosing and discharge device (10) is arranged in or below the discharge (15), and that a spreading width adjustment device (30) is arranged between the storage container (14) and the dosing and discharge device (10). 2. Device according to claim 1, characterized in that several blocking elements (32, 34) of the spreading width adjustment device (30) are arranged both in the opening position as well as in the closed position within the opening (15) and are sealed off from the outside. 3. Device according to claim 1 or 2, characterized in that the blocking elements of the spreading device (30) consist of a plurality of separately controllable blocking segments (32) arranged side by side in the width direction. 14 4. The device according to claim 3, characterized in that the locking segments (32) consist of at least one pivotable flap (34). 5 »Device according to claim 4, characterized in that several flaps (34) εindε Sperrεegmenteε (32) are coupled together and can be pivoted together. 6. Device according to one of claims 3 to 5, characterized in that a plurality of blocking segments (32) can be distributed together. 7. Device according to one of claims 1 to 6, characterized in that the machine frame (1) for stabilizing and / or recycling of floors with little load-bearing capacity carries a work roll (8), and in that the metering and discharge device (10) in the working direction ( 3) is arranged directly in front of the work roll (8). 8. Device according to one of claims 1 to 7, characterized in that the metering and discharge device (10) for the grit (5) from a cellular wheel sluice (11), the speed of which can be controlled as a function of the speed of advance. 9. The device according to claim 8, characterized in that a weighing device, for example, below the Vorratε Containers (14) arranged weighing cells, daε discharged grit weighs and regulates the speed of the cellular wheel sluice (10) in addition depending on the grit actually discharged. - 15 - 10. Device according to one of claims 1 biε 9, characterized in that the scattering material (5) consists of a powdered binder. 11. Device according to one of claims 1 to 10, characterized in that at the lower end of the metering and discharge device (10) to the hood (7) open and sideways, and in the direction of travel to the floor sealing, flexible sealing wall (18) is arranged. 12. Device according to one of claims 1 biε 11, characterized in that vibrating vibrators (22) are arranged on the walls (20) of the storage container. 13. Device according to one of claims 1 to 12, characterized in that the storage container (14) has a plurality of level sensors (24). 14. The apparatus according to claim 13, characterized in that the vibration vibrator (22) are controllable in dependence on the signals of the level sensors (24). 15. The device according to one of claims 1 to 14, characterized in that the storage container (14) can be refilled pneumatically with powdered grit (5). 16. The device according to one of claims 1 to 15, characterized in that the Reservoir (14) has an exhaust air filter (26).