EP3258013A1 - Roller for asphalt compaction, in particular rubber wheel roller, and method for spraying a rubber wheel of a roller for asphalt compaction - Google Patents

Abstract

The present invention proposes a roller for asphalt compaction, in particular a rubber wheel roller, comprising - a rubber wheel, a spraying device for spraying the rubber wheel with a release agent mixture composed of a first liquid and a second liquid, a first tank for the first liquid and a second tank for the second liquid, characterized in that the rubber roller for forming the release agent mixture comprises a mixing device for mixing the first liquid provided by the first tank and the second liquid provided by the second tank. The invention further relates to a method for spraying a rubber wheel of a roller for asphalt compaction with a release agent mixture.

Description

The present invention relates to a roller for asphalt compaction, in particular a rubber wheel, with a rubber wheel and a spraying device for spraying the rubber wheel with a release agent mixture and a method for spraying a rubber wheel of an asphalt compaction roller, in particular a Gummiradwalze, with a release agent mixture.

Generic roller for asphalt compaction or asphalt rollers with at least one rubber wheel, in particular rubber wheel rollers, are well known from the prior art. Such self-propelled rollers usually comprise a machine frame or a chassis, a chassis, at least one rubber wheel, a water tank and a driver's cab or a driver's cab, preferably with rollover protection. They also have a main drive motor, which is regularly an internal combustion engine, such as a diesel engine. The rubber wheel roller belongs to the group of static rollers and causes by their weight alone a compaction of a substrate or floor covering. An essential feature of a rubber wheel roller are the rubber wheels, which are usually suspended individually and compact with the help of their Walk and Knetwirkung the ground. In addition to compaction, a pore closure is achieved on the surface of the substrate. In operation, the rubber wheel roller is guided or rolled with the rubber wheels over the flooring to be compacted. The rubber wheels are driven by the main drive motor to a horizontal and transverse to the direction of rotation axis rotated. The invention thus relates generally to rollers for asphalt compaction having at least one rubber wheel used in the compaction process. Here it is known rollers to provide for asphalt compaction with a metal bandage and at least one rubber wheel. Such rolls are also referred to as combination rolls. An example of such a roll is the model BW 138 AC-5 of the applicant. A "pure" Gummiradwalze is for example the model BW 27 RH of the applicant, which has exclusively rubber wheels for asphalt compaction. Insofar as information is thus provided below for the formation of the roller, this applies in particular to rubber-wheeled rollers, in particular those which have exclusively rubber wheels.

During operation of the roller for asphalt compaction, it happens regularly that to be compacted flooring, especially asphalt, unintentionally adheres to the rubber wheels and is carried. This tendency of the rubber wheel to carry floor covering is decisively determined by the temperature of the wheels and of the installed paving material / floor covering, in particular asphalt material. It has been found that adhesion is the more likely the lower the temperature of the rubber wheels. In order to counteract adhesion of the floor covering, in particular to the rubber wheels not yet heated at the beginning of work, it is therefore customary to spray the rubber wheels with a so-called release agent mixture. The release agent mixture is typically an emulsion formed from a release agent concentrate, often organic in nature, and water. A known release agent concentrate is known, for example, under the name "BOMAG Bitumentrennmittel" or "BOMAG Separating Agent" or the trade name "BITU-TRENNKONZENT.GRÜN (Bomag)". Responsible for the release agent mixture is usually a roller guide that fills the release agent mixture in a machine-fixed tank. Here, the roller guide to pay attention to the correct mixing ratio between water and release agent concentrate, as this depends on the one hand by the particular application for which the roller is currently provided, and on the other hand from the particular release agent concentrate used. Once a release agent mixture of unknown composition in the tank, this complicates the precise setting of the desired mixing ratio of release agent concentrate and water in the release agent mixture, so that it can not be ensured that the prepared release agent mixture in the case of the current application of the requirements for achieving the desired effect, namely the suppression of adherence of the floor covering on the rubber wheel is sufficient.

In addition, it turns out to be a disadvantage on a regular basis that the release agent mixture must be protected from frost. This often leads in practice to the risk of frost in the rubber roller contained release agent mixture after the work operation in a complex manner first drained, then collected, then stored in a frost-protected area and finally must be filled into the tank again or disposed of after collection. Even separation tendencies of the release agent mixture cause problems. For example, it may be necessary for the release agent mixture to be manually remixed by the driver for longer service lives of the roller, which is likewise perceived as disadvantageous.

It is therefore an object of the present invention to provide a roller for asphalt compaction with at least one rubber wheel, which allows the most precise possible adjustment of the mixing ratio of release agent concentrate and water and its handling at frost risk over the prior art is simplified. Furthermore, a method for operating such a roller should be specified.

The object is achieved with a roller, in particular a rubber wheel, and a method according to the independent claims. Preferred developments are specified in the dependent claims.

Specifically, the invention proposes to provide a first liquid, preferably water, in a first tank and a second liquid, preferably a release agent concentrate in a second tank separately on the roller for asphalt compaction, in particular the rubber wheel. The release agent concentrate is concretely generally a liquid comprising, for example, oil, in particular vegetable oils, and at least one additive, for example an emulsifier. Release agent concentrates per se are known. By means of the mixing device according to the invention, the first liquid and the second liquid on the roller, in particular the rubber wheel, even over the operation away as needed mix so as to release agent mixture that the provided by the mixing device release agent mixture can be essentially used up by the spray device. Unlike before, the release agent mixture is thus mixed continuously over the working process on the roller in situ from the first and the second liquid. Accordingly, it is avoided by means of the roller according to the invention that after operation of the roller, a considerable remainder of release agent mixture remains in the roller. As a result, it is possible to prevent the reuse of the roller due to ignorance of the present mixing ratio, the release agent mixture still present in the roller must be disposed of. In addition, the re-use ratio can be accurately adjusted regardless of knowledge about the previous applications of the roller. Furthermore, the use of a first tank and a second tank allows a more flexible operation, since the first tank or second tank can be designed differently in terms of their size. In this case, it is provided, in particular, that a capacity of the second tank is less than a capacity of the first tank, preferably less than half the capacity of the first tank, and more preferably less than one quarter of the capacity of the first tank. The receiving volume ratio of the first tank to the second tank is therefore particularly preferably greater than 10: 1 and very particularly greater than 15: 1. Because of the smaller capacity, the second tank can be emptied faster and thus more flexibly or exchange its contents faster than is the case for a tank, which is provided for the release agent mixture according to the prior art. This makes the roller according to the invention more flexible in its operation, for example with regard to a change of the release agent concentrate. In addition, eliminates the previously required before the operation of mixing the release agent mixture. It is essential that it is provided according to the invention that a first pump for conveying a first liquid from the first tank to the mixing device and / or a separate second pump for conveying the second liquid from the second tank to the mixing device are provided. The two liquids are thus particularly preferably conveyed via their own pump to the mixing device.

It is preferably provided that the roll for providing the first liquid comprises a first feed line which connects the first tank to the mixing device, and / or a second feed line which connects the second tank to the mixing device for providing the second liquid. The first supply line and / or the second supply line preferably has a filter. By means of the filter can be advantageously remove foreign matter from the first or the second liquid before they reach the mixing device or any pumps. This has a positive effect on the life or functionality of the mixing device or a filter downstream of the pump. From the tanks in the conveying direction of the first and the second liquid behind the mixing device, a connecting line to the spray device is also provided, via which the release agent mixture produced can be applied to the at least one wheel. In this line section no filter is preferably arranged. The first and the second pump are ideally arranged in each case between the first or second tank and the mixing device.

A mixing device herein means a functional set of components that provide for combining the first liquid and the second liquid, for mixing the first liquid and the second liquid to form the release agent mixture, and for providing the release agent mixture at an outlet of the mixing device. The mixing device is to, preferably via separate line connections, connected to the first and the second tank. For concrete mixing, the mixing device ideally comprises a chamber, in particular a tubular chamber, in which the first liquid and the second liquid are mixed together. In order to further optimize this mixing process, it is also preferred if a mixing tool, in particular within the chamber, is present, for example a water jet pump or a static mixer, with which a mixing of the two liquids is improved. In this case, the first liquid and the second liquid are preferably introduced into the chamber via a first opening and a second opening or a common opening. Preferably, the chamber has an outlet at the end which forms the outlet of the mixing device and to which the release agent mixture for the spray device is provided. Included in the invention are embodiments in which the mixing device is part of the spray device or forms a coherent module with it. Alternatively, it may also be provided that the spraying device directly adjoins the mixing device or that the mixing device is arranged in the engine compartment in the vicinity of the first tank and / or the second tank. To bridge any distance between the spray device and the mixing device, these are in particular connected to one another via a common supply line, via which the release agent mixture is guided from the mixing device to the spray device. In principle, it is also possible for the roll to comprise a plurality of mixing devices, for example for a forward-facing and a forward-downstream spraying device. However, it is preferred that the mixing device, provided that the roller has a plurality of spray devices, for example for different rubber wheels, supplies all the spray devices together with release agent mixture. As a result, it can be ensured in an advantageous manner that the mixing ratio for all spray devices and thus all rubber wheels is identical or identical.

Concretely, spraying bars are preferably provided as the spraying device which extend over one or more rubber wheels along a wheel axle, for example. It is preferably provided that the spray bar one or more outlet openings, preferably regularly, in particular equidistant, distributed along the wheel axle outlet openings. Preferably, the spray bar comprises one or more spray nozzles as outlet openings, wherein the spray nozzles are aligned such that their respective spray cone strikes at least and preferably exactly one or two rubber wheels. Furthermore, in a preferred embodiment it is provided that two spray bars are arranged via a front wheel axle viewed in the direction of travel (when driving forwards), while a single spray bar is arranged along a rear wheel axle viewed in the direction of travel (when driving forwards).

Basically, the release agent mixture refers to any liquid that is capable of reducing the chance of sticking of flooring to the rubber wheel or loosening the flooring from the rubber wheel. It is preferably provided that the release agent mixture, an emulsion, preferably a macroemulsion (droplet diameter> than 1 μ m), mini-emulsion (droplet diameter in the range of a μ m or a nano-emulsion (droplet diameter is <100 nm). To this end, for example, under the Trade name "BITU-TRENNKONZENT.GRÜN (Bomag)" used release agent concentrate.

According to the achievable mixing ratio between the first and the second liquid is variable. For this purpose, it is provided that the mixing device has a regulating device for setting a mixing ratio in the release agent mixture between the first liquid and the second liquid. By means of the regulating device, the roller guide can easily change or adapt the mixing ratios between the first and the second fluid. Concretely, the regulating device may comprise, for example, a mechanical, electrical and / or radio-controlled first actuating element, via which the roller driver can set and change the mixing ratio predetermined by the regulating device. Preferably, this first actuating element is arranged in the driver's cab and / or in a side wall area accessible from outside the roller. It is ideal if the regulating device can be controlled during operation. This allows the roller operator to change and optimize the composition of the release agent mixture during operation of the roller without interrupting the operation of the roller. In particular, it is provided that the regulating device is actuated during operation in order to keep the mixing ratio in the release agent mixture constant. This can be counteracted by means of the controllable regulating device, for example, the circumstance that with increasing temperature, the viscosity of the first and the second liquid change differently and so the amount of supplied amount of first liquid and second liquid by any temperature fluctuations during operation, in particular in a period immediately after commissioning of the roll, occur or by Temperature fluctuations in the environment, unintentionally influenced. Furthermore, it is also possible that by means of the regulating device, the supply of first and / or second liquid during operation of the roller, in particular after the expiration of a critical time frame after commissioning of the roller, is completely prevented. In principle, the regulating device preferably designates a device with which an amount of first and / or second liquid provided to the mixing device can be controlled and with which the mixing ratio between first liquid and second liquid can be adjusted. For example, it is one or more valves or one or more fine regulating valves. Additionally or alternatively, it is also possible for the amount of first liquid and / or the amount of second liquid to be controlled by means of a pump, in particular a variable displacement pump.

An essential element of the regulating device is a control device which controls the first and / or the second pump. The controller may be part of a control loop that automatically adjusts the amount of first or second liquid provided to the mixing device to provide a mixed ratio release agent mixture during operation. The control device thus preferably designates a control arrangement with control electronics in contrast to a purely mechanical solution. It can be provided, for example, that the control device, the first (preferred) and / or the second pump at intervals on and off. A dosage of the delivery volume is thus carried out via a change in the on and off intervals of the pump. However, when the pump is switched on, it promotes a substantially constant volume over the switched-on period. However, the control device may also (preferably) control the first and / or the second pump in such a way that its delivery volume is varied in the switched-on state. This can be done for example by adjusting the angular position of a swash plate, etc. Here, the pump can thus be operated continuously and at the same time a change in the delivery volume can be achieved. The mixing ratio is thus achieved by a corresponding control of the two pumps by the control device according to the invention.

According to a preferred embodiment of the present invention, it is provided that the control device for controlling the regulating device with a first actuating element, in particular with a first actuating element arranged in a driver's cab of the roller, and / or for setting an operating mode of the spray device with a second actuating element, in particular with a arranged in the cab of the roller second actuator is connected. For example, the first and / or second actuating element is a switch, in particular a rotary or toggle switch, or a keypad. It is also conceivable that the first and / or second actuating element is integrated in a touch display. In addition to the operating modes in which the spraying device is switched on or off, an interval mode is preferably provided as a further operating mode during operation of the rubber roller in which the rubber wheel is sprayed with the release agent mixture for a first time interval and the spraying of the rubber wheel during a second time interval is interrupted. This is set in particular via the second actuating element and the mixing ratio of the two liquids via the first actuating element. Both actuators are connected to the control device.

It is ideal if the roller has the first pump for conveying the first fluid from the first tank to the mixing device and / or the second pump for conveying the second fluid from the second tank to the mixing device, both of which are controlled by the control device. The first pump or the second pump advantageously ensure that the first liquid or second liquid are conveyed to the mixing device. It may be provided that the two liquids are brought together in the conveying direction before the mixing device or only be combined in the mixing device itself. It is preferably provided that the first pump is designed to generate a first volume flow, for example 3.8 l / min, and the second pump is designed to generate a second volume flow, for example between 0.2 l / min and 0.95 l / min , In addition, it is also conceivable that the first and / or second pump are designed as a variable displacement pump, in particular with variable displacement volume, and in this way contribute to setting the mixing ratio of the first and / or second pump. It may, as already mentioned above, also be provided that the first and / or the second pump are designed as constant pumps and a change in the delivery volume over the on and off intervals occurs during interval operation. It is essential that both pumps are controlled by the controller and about a change in the delivery volume per unit time and / or the operating interval is made possible, which allows a change or the achievement of a predetermined mixing ratio of the two liquids. In particular, the first pump and / or the second pump, for example, a peristaltic pump, a gear pump or a diaphragm pump. The use of a cost peristaltic pump also proves to be advantageous in that it has a low influence on the viscosity and is relatively robust, since the first liquid or the second liquid has only contact with the hose. A gear pump advantageously causes a comparatively low pulsation, while a diaphragm pump is comparatively favorable. Furthermore, it is conceivable that a pump of the same type of construction is used as the first pump and as the second pump. It is particularly preferred if the first and / or the second pump are connected to the electrical system of the roller for electrical power supply.

In order to store the second tank frost-protected if necessary, it is preferably provided that the second tank and the rest of the roller are detachably connected to each other via a coupling device. Such a reversibly detachable connection between the second tank and the roller also allows replacement of the second tank with another liquid containing another liquid, such as another release agent concentrate, or a second "filled" tank. This can be done by simply replacing the second tank in a straightforward way, a change of the release agent concentrate or a "replenishment". This can be, in particular, the distributed trade container, such as a canister, so that it is possible to dispense with suitable special tanks. In particular, it may be provided for removal that the connection via an immersion lance for suction or the like. Alternatively, the lid of the retail package can be designed according to the removal. A coupling device is to be understood in particular as one with which a change between a connected state and a non-connected state can be repeated in the same way and thus reversibly. For this purpose, the coupling device preferably has tank-side and roller-side coupling elements, which, for example, positively and / or frictionally engage one another in the connected state. It is also conceivable that a fixing element, such as a belt, a holding cup or a bolt, ensures the temporary coupling between the roller and the second tank. It is conceivable that for decoupling of the coupling elements a Entrastbewegung or rotary motion is provided, for example, a bayonet closure, with the engagement between the Coupling elements is released. It is ideal if the coupling device can be operated without tools or purely manually from a released to a securing position and vice versa. In order to ensure the functionality after refilling with a second tank, the second tank preferably comprises a connection element which can be connected to an opening in the second supply line in such a way that the second liquid can pass from the second tank into the second supply line. In an alternative embodiment, it is provided that the roller has a drain for discharging the second liquid from the second tank. This allows the second liquid to be removed from the second tank as needed and to ensure that the second liquid does not freeze when the roll is not in use.

Furthermore, it is preferably provided that a leakage protection is provided in the outlet of the second tank. This leakage protection is characterized in that it automatically closes the outlet of the second tank when the coupling device or the line connection of the second tank is released to the line system to the mixing device, or opens when the second tank is connected to the coupling device. Specifically, this can be used, for example, quick couplings whose operating principle, for example, in the DE2653976A1 is illustrated.

In order to protect the second tank against external influences, it is further preferably provided that the second tank is arranged within a lining, in particular outer lining, of the roll. In particular, the tank is mounted on an inside of the panel or chassis. This makes it possible to realize a stable arrangement in an advantageous manner by the second tank rests with at least one of its side walls on the inside of the panel surface. Additionally or alternatively, it is also advantageous if the second tank is arranged in the engine compartment of the roller or in the region of the wheel house. Due to the arrangement in the region of the wheel well, easy access to the second tank - for example for the discharge of the second liquid - from outside the machine is advantageously possible. In a further alternative, the second tank is arranged outside the engine compartment, in particular below the driver's cab. With such an arrangement can be advantageously minimize a temperature influence by the engine on the second liquid and thus on the viscosity of the second liquid.

In an alternative embodiment, the second tank is, for example, on an outer panel the roller attached from the outside and therefore arranged easily accessible from the outside. This advantageously allows immediate access to the second tank. For example, the second tank is arranged on a hood of the roller, in particular next to the first tank or next to a water tank. Preferably, the second tank engages in a recess in the outer lining and is there arranged non-slip because of a positive interaction with the recess. It is also conceivable that the attached to the outer lining second tank has a viewing window, with the help of the roller guide directly obtains information about a level of the second tank.

As mixing devices, a water jet pump or a static mixer are preferably provided. Basically usable, however, even if associated with a higher installation effort, moving or even driven mixing devices, such as propellers. If a water jet pump is used, a pump in the second supply line can advantageously be dispensed with, since the second liquid is sucked in by the negative pressure prevailing in the water jet pump. In addition, remain when using the water jet pump substantially no remnants of release agent mixture, which would have to be removed after operation or before restarting the roller again from the mixing device. A static mixer usually comprises a pipe section and a flow-influencing mixing element arranged in this pipe section. Known static mixers are known, for example, under the designations Kenics mixer and Sulzer SMV / SMX mixer. When using a static mixer can be discussed in an advantageous manner to the physical properties of the first and the second liquid. For example, a lattice mixer favors the mixing of liquids with a comparatively high viscosity. Another advantage of using a static mixer is that the mixing process can be performed as controlled as possible. In order to remove any residues of the release agent mixture in the static mixer, the static mixer is preferably connected to a drain for discharging the release agent mixture from the static mixer. Furthermore, it is conceivable that the mixing device comprises a stirring tool to assist the mixing process.

• Viskosität der zweiten Flüssigkeit und/oder
• Temperatur der zweiten Flüssigkeit und/oder
• Füllstand des ersten Tanks, des zweiten Tanks und/oder des statischen Mischers und/oder
• Temperatur der Außenumgebung und/oder
• Temperatur eines oder mehrerer der Gummiräder bzw. deren Oberfläche und/oder
• Temperatur des zu verdichtenden Asphalts,

wobei die Messvorrichtung vorzugsweise mit der Steuereinrichtung verbunden ist. Zur konkreten Ermittlung der vorstehend genannten Parameter umfasst die Messvorrichtung geeignete Sensoren, beispielsweise einen Viskositätssensor, einen Temperatursensor bzw. -fühler, einen Füllstandssensor etc. Durch das Erfassen der Viskosität bzw. der Temperatur der zweiten Flüssigkeit lässt sich in vorteilhafter Weise mit Hilfe der Steuereinrichtung ein Regelkreis realisieren, mit dessen Hilfe zur Beibehaltung des Mischverhältnisses die Menge an zweiter Flüssigkeit automatisch korrigiert wird, wenn sich die Temperatur bzw. die Viskosität der zweiten Flüssigkeit, insbesondere beim Betriebsbeginn der Walze oder durch Umgebungstemperaturänderungen während des Betriebs, ändert. Die Steuereinrichtung weist dazu eine entsprechende Korrekturfunktion auf. Mittels der Messvorrichtungen zur Erfassung der Füllstände kann der Walzenführer in vorteilhafter Weise auf einen möglichen Bedarf an erster oder zweiter Flüssigkeit aufmerksam gemacht werden und/oder über die noch verfügbare Reichweite informiert werden. Ergänzend oder alternativ können auch die weiteren vorgenannten Faktoren in die Steuerung mit einfließen. Dies betrifft insbesondere auch eine Steuerung bzw. Regelung der Regulierungsvorrichtung mittels der Steuereinrichtung in Abhängigkeit von der Reifentemperatur bzw. dessen Oberflächentemperatur, der Asphalttemperatur und/oder der Umgebungstemperatur. Insbesondere bei tiefen Temperaturen steigt die Neigung des Asphalts an den Gummirädern anzuhaften. Speziell dann ist das Auftragen des Trennmittelgemisches über die Sprühvorrichtung auf die Gummiräder erforderlich. Durch geeignete Temperatursensoren können eine oder mehrere der vorgenannten Temperaturen bestimmt und als Regelgröße von der Steuereinheit mit berücksichtigt werden. So kann es insbesondere vorgesehen sein, dass ab dem Überschreiten eines festgelegten Temperaturschwellenwertes das Austragen von Trennmittelgemisch automatisch unterbrochen wird, da dann der Asphalt nicht mehr anhaftet. Genauso ist es umgekehrt möglich, dass das Austragen automatisch dann wieder aufgenommen wird, wenn ein festgelegter Temperaturschwellenwert unterschritten wird. Auf diese Weise gelingt ein besonders effizienter Einsatz des Trennmittelgemisches. Ergänzend oder alternativ ist es auch möglich, das Mischverhältnis von erster und zweiter Flüssigkeit temperaturabhängig zu variieren. Dies umfasst insbesondere eine Steuerung derart, dass bei tiefen Temperaturen der Anteil der zweiten Flüssigkeit im Trennmittelgemisch höher ist als bei hohen Temperaturen, sei es nun bezogen beispielsweise auf die Umgebungstemperatur, die Reifentemperatur und/oder die Asphalttemperatur. Alternativ ist allerdings auch eine manuelle Einstellung des Mischverhältnisses und/oder der Berieselung an sich von der Erfindung mit umfasst. Auch hierfür ist allerdings die Verwendung der vorstehend beschriebenen Messvorrichtung vorteilhaft, wobei dann ergänzend idealerweise ein Anzeigen der ermittelten Messwerte an den Fahrer über eine geeignete Anzeigevorrichtung erfolgt. Dies kann ihm als Orientierung zur manuellen Einstellung der Mischparameter und/oder der Inbetriebnahme der Sprühvorrichtung und der Mischvorrichtung dienen.According to a preferred embodiment of the invention, it is provided that the roller has a measuring device for determining at least one of the following properties:

• Viscosity of the second liquid and / or
• Temperature of the second liquid and / or
• Level of the first tank, the second tank and / or the static mixer and / or
• Temperature of the outside environment and / or
• Temperature of one or more of the rubber wheels or their surface and / or
• Temperature of the asphalt to be compacted,

wherein the measuring device is preferably connected to the control device. For the concrete determination of the abovementioned parameters, the measuring device comprises suitable sensors, for example a viscosity sensor, a temperature sensor or sensor, a filling level sensor, etc. By detecting the viscosity or the temperature of the second liquid, it is possible to use the control device in an advantageous manner Realize control loop, which is used to maintain the mixing ratio, the amount of second liquid is automatically corrected when the temperature or the viscosity of the second liquid, especially at the start of operation of the roller or by ambient temperature changes during operation, changes. The control device has a corresponding correction function for this purpose. By means of the measuring devices for detecting the levels of the roller guide can be made aware of a possible need for first or second liquid advantageously and / or informed about the still available range. Additionally or alternatively, the other factors mentioned above can also be included in the control. This also applies in particular to a control or regulation of the regulating device by means of the control device as a function of the tire temperature or its surface temperature, the asphalt temperature and / or the ambient temperature. Especially at low temperatures, the tendency of the asphalt to adhere to the rubber wheels increases. Especially then the application of the release agent mixture on the spray device is required on the rubber wheels. By suitable temperature sensors, one or more of the aforementioned temperatures can be determined and taken into account as a controlled variable by the control unit. Thus, it can be provided in particular that the discharge of release agent mixture is automatically interrupted when a predetermined temperature threshold value is exceeded, because then the asphalt no longer adheres. In the same way, conversely, it is possible for the discharging to be resumed automatically if the temperature falls below a defined temperature threshold value. In this way, a particularly efficient use of the release agent mixture succeeds. Additionally or alternatively, it is also possible to vary the mixing ratio of the first and second liquid temperature-dependent. This includes in particular a control such that at low temperatures, the proportion of the second liquid in the release agent mixture is higher than at high temperatures, be it for example, based on the ambient temperature, the tire temperature and / or the asphalt temperature. Alternatively, however, a manual adjustment of the mixing ratio and / or the irrigation per se of the invention is included. However, the use of the measuring device described above is also advantageous for this purpose, in which case ideally the supplementary display of the determined measured values to the driver takes place via a suitable display device. This can serve as orientation for manual adjustment of the mixing parameters and / or commissioning of the spraying device and the mixing device.

For this purpose, it can be provided, in particular, that the respective measuring device is either integrated directly into a line section and / or a separate measuring line, for example in the form of a bypass line, is provided.

The object is also achieved by a method for spraying a rubber wheel of a roller for asphalt compaction, in particular a roller according to the preceding embodiments. All features and advantages described for the roller according to the invention can be analogously also transferred to the inventive method and vice versa.

Specifically, the inventive method for spraying a rubber wheel of the roller comprises, in particular demand-dependent, mixing a first liquid and a second liquid to form a release agent mixture in the mixing device and then spraying the at least one rubber wheel with the release agent mixture provided by the mixing device. For this purpose, the first liquid in a first tank and the second liquid are provided in a second tank, wherein the first and the second tank are mounted or arranged in the operation of the roller. By mixing the first liquid and the second liquid, preferably in time immediately before the spraying of the release agent mixture by the spray device, it is possible to react in the shortest possible time and in a straightforward way to changes in the mixing ratio or the mixing ratio in the short term to a modified application to adjust for the roller. A demand-dependent mixing is to be understood in particular as such mixing in which the mixture of first liquid and second liquid is mixed only during operation of the roll and preferably immediately before spraying depending on the current needs. In particular, a mixing process in the mixing device and a spraying pass of the release agent mixture by means of the spray device less than 40 s, preferably less than 10 s and more preferably less than 5 s.

To adjust or change the mixing ratio between the first and the second liquid, a quantity of first liquid or second liquid provided to the mixing device is adjusted by means of a regulating device. For this purpose, it is provided according to the invention that the mixing device provided amount of first and / or second liquid by means, in particular in each case, a pump, in particular a variable displacement pump or in a manner described above, is set. For this purpose, for example, an input voltage to the pump is varied to change the provided amount of first and / or second liquid, changed a regular operating interval, the delivery volume varies, etc. This is done by means of a control device of the regulating device, which controls the operation of the two pumps during operation Roller controls. Thus, both the first and second pumps are preferably independently controlled by the controller to provide the desired mixing ratio between the first and second fluids.

In order to counteract possible fluctuations in the mixing ratio of the release agent mixture during operation, in particular in a time window at the start of operation of the roller, it is provided in particular that the regulating device during operation of the roller, in particular in dependence on a viscosity or temperature of the second fluid, is pressed. With a constant mixing ratio it can be ensured that the release agent mixture does not lose its effect during operation due to a changed mixing ratio. It is also conceivable that an ambient temperature has changed between two inserts of the roller and by means of the regulating device a variation of the mixing ratio caused thereby is counteracted. Additionally or alternatively, the regulating device or the entire spraying device can also be operated as a function of a temperature of at least one rubber wheel or its surface and / or as a function of a temperature of the asphalt to be compacted and / or a temperature of the outside environment. This also applies in particular to the automatic startup and / or the automatic switching off of the spray device and / or the changing of the mixing ratio of the first and the second liquid in the release agent mixture by the mixing device as a function of exceeding or falling below specified temperature threshold values.

In order to avoid freezing of the second liquid when the roll is not in operation, it is preferably provided that, after the operation of the roll, the second liquid is discharged from the second tank or the second tank, in particular completely, is released from the roll , Furthermore, it is conceivable that the second tank is released from the roll and is replaced by another second tank with a further second liquid. As a result, an uncomplicated change between two different release agent concentrates can be realized. The tank is preferably the trading container, for example, a conventional canister.

Figur 1

eine Seitenansicht einer Walze zur Asphaltverdichtung, konkret einer Gummiradwalze;

Figur

2 ein System zum Besprühen eines Gummirads für eine Walze zur Asphaltverdichtung gemäß einer ersten beispielhaften Ausführungsform der vorliegenden Erfindung;

Figur 3

ein System zum Besprühen eines Gummirads für eine Walze zur Asphaltverdichtung gemäß einer zweiten beispielhaften Ausführungsform der vorliegenden Erfindung;

Figur 4

ein System zum Besprühen eines Gummirads für eine Walze zur Asphaltverdichtung gemäß einer dritten beispielhaften Ausführungsform der vorliegenden Erfindung;

Figur 5

eine Anordnung eines zweiten Tanks an einer Gummiradwalze;

Figur 6

eine alternative Anordnung eines zweiten Tanks an einer Gummiradwalze;

Figur 7

eine weitere alternative Anordnung eines zweiten Tanks für eine Gummiradwalze; und

Figur 8

ein Flussdiagram zu einem Verfahren zum Besprühen eines Gummirads.

The invention will be described in more detail with reference to the embodiments given in the figures. They show schematically:

FIG. 1

a side view of a roller for asphalt compaction, specifically a Gummiradwalze;

figure

2 shows a system for spraying a rubber wheel for an asphalt compaction roller according to a first exemplary embodiment of the present invention;

FIG. 3

a system for spraying a rubber wheel for an asphalt compaction roller according to a second exemplary embodiment of the present invention;

FIG. 4

a system for spraying a rubber wheel for an asphalt compaction roller according to a third exemplary embodiment of the present invention;

FIG. 5

an arrangement of a second tank on a Gummiradwalze;

FIG. 6

an alternative arrangement of a second tank on a Gummiradwalze;

FIG. 7

another alternative arrangement of a second tank for a rubber wheel roller; and

FIG. 8

a flow diagram of a method for spraying a rubber wheel.

Identical elements are provided with the same reference numerals in all figures. Partial repeating elements are sometimes not designated separately in each figure.

In FIG. 1 is a generic roller 1, specifically a rubber roller 1, in particular a self-propelled rubber roller 1, with a chassis 52, a driver's cab or a driver's cab 50, rubber wheels 2 and a motor 51 shown in a side view. The in the Fig. 1 and in the other figures illustrated rubber wheels 1 are representative of generally rollers 1 for asphalt compaction, especially so-called combination rollers to understand. Of the rubber wheels 2 only the front wheels are recognizable. Specifically, both front and rear four rubber wheels 2 are arranged side by side, the front rubber wheels are arranged in known manner in the art in the direction of travel on the gap to the rear rubber wheels 2. Such rubber tyred rollers 1 are typically intended for compacting in road construction, during operation they travel over a floor covering to be compacted. A kneading and whetting effect emanating from the rubber wheels 2 in this case leads to a homogeneous compaction and a pore closure on a surface of a layer of the floor covering to be compacted. During operation, ie when compacting the floor covering, it happens regularly that to be compacted flooring adheres to the rubber wheels 2 and is carried, with such a tendency of the rubber wheel 2 material also significantly dependent on the temperature of the rubber wheel 2. An adhesion of the floor covering takes place in particular at low temperatures of the rubber wheels, which prevail, for example, immediately after commissioning of the rubber wheel 2. To prevent this, recourse is made to a release agent mixture 10 which is sprayed onto the rubber wheel 2 or all of the existing rubber wheels 2 via a spray device 70. Such a release agent mixture 10 is composed in particular of at least one first liquid 11, preferably water, and at least one second liquid 12, preferably a release agent concentrate. The FIGS. 2 to 4 show embodiments of systems that are provided for mixing the two liquids and for spraying the rubber wheels 2.

In FIG. 2 Fig. 10 is a system for spraying a rubber wheel 2 for a rubber wheel 1 according to a first exemplary embodiment of the present invention. There are provided a first tank 21 for the first liquid 11, a second tank 22 for the second liquid 12 and a mixing device. As a result, it is advantageously possible to dispense with a common tank provided for the release agent mixture 10, and the release agent mixture can be produced from the two liquids during operation on the machine. By means of the mixing device, the first liquid 11 and the second liquid 12 are mixed to the release agent mixture 10 and then passed as a release agent mixture via a common line to a spray device 70. For example, the spray device 70 is a spray bar 71 which extends horizontally and transversely to the working direction over the front or rear rubber wheels and to which spray nozzles 72, preferably individually adjustable spray nozzles 72, are arranged at regular intervals. These spray nozzles 72 are preferably directed towards the rubber wheel 2 or oriented so that their spray cone hits the rubber wheel 2. However, other spray devices 70, such as those which instead of spray nozzles 72 have simple outlet openings, are also possible and encompassed by the invention.

In the in the FIG. 2 illustrated embodiment, a water jet pump 5 is provided as a mixing device, which allows the first liquid 11 and the second liquid 12 can be mixed with each other as needed. Here, the first tank 21 are connected to the first liquid 11 via a first supply line to the mixing device and the second tank 22 to the second liquid 12 via a second supply line to the mixing device. The water jet pump 5 in this case has in particular two inputs and one output. During operation of the water jet pump, at a first inlet, a jet encompassing the first liquid 11 passes from a nozzle into a pipe of larger diameter under the highest possible line pressure. Via a second input, the second liquid 12 receives from the second supply line, in particular because of the negative pressure prevailing in the tube, access to the tube with a larger diameter. Friction causes turbulence between the rapidly flowing jet of the first liquid 11 and the medium in the tube containing the second liquid 12, thereby mixing the first liquid 11 and the second liquid 12. An advantage of using a water jet pump 5 is that none Residues remain from the composite release agent mixture 5 in the system or in the mixing device.

Furthermore, it is provided that the second supply line has a regulating device in the form of a valve 3 and a fine regulation valve 4. This can be advantageously This, in particular, proves to be advantageous in that a change in the mixing ratio, which is caused by temperature changes during startup of the rubber wheel or temperature changes in the vicinity of the rubber wheel 1, can be counteracted. Such a change of the mixing ratio is to be expected, for example, if the first liquid 11 and the second liquid 12 have different temperature dependencies with regard to their viscosity and, as a result of a temperature change, the respective quantity of first liquid 11 and second liquid 12 fed to the mixing device change differently and so the mixing ratio is modified unintentionally. In addition, it is conceivable that the mixing ratio can be adjusted depending on the situation on the respective need for second liquid 12 or depending on the particular application for the rubber wheel 1 via the regulating device during operation of the rubber wheel.

Furthermore, it is provided that the first supply line, ie usually the water supply line, as part of a regulating device comprises a valve 3 and a filter 7. By means of the filter 7, the first liquid 11 supplied to the mixing device can advantageously be freed from unwanted foreign bodies. Furthermore, in the first supply line, a first pump 13 ', in particular a water pump, integrated, with which the required for the water jet pump pressure in the first line can be realized. In the in FIG. 2 In this embodiment, the filter 7 is arranged between the valve 3 and the water pump 5. In order to be able to provide a desired target pressure at the spray device 70, preferably between 1.5 and 2 bar, a pressure regulating device is furthermore provided, which in the illustrated embodiment is realized by a bypass bypassing the pump 13 ', wherein the bypass is a check valve with spring 6 ' having. Thus, the system pressure is regulated purely in the water cycle. Both the valves 3 and the pump 13 'are controlled by a control device 60 via suitable control lines. In addition, the control device 60 controls, for example, the open and closed positions of the valves 3 and / or the operation of the pump 13 ', for example with regard to startup and shutdown intervals and / or the delivery volume. The set of valves 3, pump 13 ', control device 60 and control lines forms the regulating device. This receives operating instructions from the operator via appropriate actuation means, such as in Fig. 4 illustrated in more detail.

In FIG. 3 Fig. 10 is a system for spraying a rubber wheel 2 for a rubber wheel 1 according to a second exemplary embodiment of the present invention. In particular, it is provided here that the second tank 22 is designed as a pressure tank 22 '. The tank 22 can thus be placed under an overpressure against the outside environment. For conveying the second liquid 12, it is provided in the second exemplary embodiment that the second liquid 21 is pressurized in the second tank 22 by means of compressed air from a compressed air reservoir 31, thus causing the transport of the second liquid 12 to the mixing device. Means of a controlled by the controller 60 pressure reducing valve 32, which is interposed between the compressed air reservoir 31 and the pressure tank 22 ', can be a preferred pressure, for example, between 1.5 and 2 bar set. The second supply line, which connects the second tank 22 to the mixing device, furthermore preferably comprises, as part of the regulation device, a 2/2-way valve 8, in particular an electrically actuatable 2/2-way valve, and a fine regulation valve 3, to control the mixing ratio between the first Liquid 11 and the second liquid 12 in the release agent mixture 10 depending on the situation and need to adjust or readjust. Furthermore, the second supply line between the 2/2 - way valve 8 and the mixing device, a check valve without spring 6 ", which prevents the first liquid 11 in the closed state in the second supply line.

The first liquid 11 passes, as is known from the first embodiment, via a first supply line with a filter 7 and driven by a first pump 13 'to the mixing device. In order to be able to provide a desired setpoint pressure at the spray device 70, preferably between 1.5 and 2 bar, a bypass bypassing the pump 13 'is furthermore connected to the first line as a pressure regulating device, the bypass having a check valve with spring 6 ".

The adjustment of the above-mentioned valves 3, 4 and / or 8 can be carried out manually or in particular also via a suitable control device, which, for example, depending on determined characteristic values, such as temperature, viscosity, etc., corresponding control signals to the valves 3, 4 and /. or 8 are transmitted, controlled.

In the in the FIG. 3 illustrated embodiment, a static mixer 15 is provided as a mixing device. A static mixer 15 is understood by the person skilled in the art to mean, in particular, a device for mixing fluids in which only the flow movement of the Fluids, in this case the first and the second liquid, which causes mixing and has no moving elements. Preferably, the static mixer 15 consists of flow-influencing elements which are arranged in a chamber or a mixing tube. These flow-influencing elements alternately divide the material flow and then bring it together again, whereby the mixing is achieved. The flow-influencing elements are, for example, a helical mixer or a lattice mixer.

In FIG. 4 Fig. 10 is a system for spraying a rubber wheel 2 for a rubber wheel 1 according to a third exemplary embodiment of the present invention. In this case, the third embodiment as the second embodiment as a mixing device comprises a static mixer 15. In addition, the first liquid 11 - as in the second embodiment - via a supply line with a first pump 13 ', in particular a water pump, and a filter 7 to the mixing device , Furthermore, the first supply line comprises a valve 3 between the filter 7 and the first tank 21.

In order to provide the second liquid 12, the third embodiment provides, in particular, a second tank 22 having an outlet 25. This drain 25 makes it possible to drain the second liquid 12 from the tank 22 advantageously after operation of the rubber wheel 1. If the second liquid 12 has, in particular, a comparatively low freezing point temperature, freezing of the second liquid 12 in the second tank 22 can thereby be avoided. In order to pursue the same purpose, the common feed line between the static mixer 15 and the spray device 70 additionally or alternatively preferably comprises a drain 25 which allows a discharge or removal of the release agent mixture 10 from the common line and / or the static mixer 15. In order to support the outflow of the second liquid, it is preferably provided that the bottom side of the second tank 22 tapers in a funnel shape to the drain 25 or the common supply line between the static mixer 15 and spray device 70 downhill, d. H. in the direction of a bottom surface on which the rubber wheel roller stands, runs.

Furthermore, it is preferably provided that the second fluid 12 is conveyed to the static mixer 15 by means of a second pump 13 ", in particular a controllable variable displacement pump, controlled separately from the first pump 13 ', for which purpose such a second pump 13" is in the second Integrated supply line. It is conceivable that it is the second pump 13 "is an electrically adjustable variable-displacement pump with the aid of which an electrical input voltage regulates the amount of second liquid 12 which is supplied to the static mixer 15 per unit of time .. In other words, the variable-displacement pump controlled by the control device forms For controlling, the variable displacement pump is connected to the control device 60. Via a first actuating element 61, which is preferably arranged in the driver's cab 50 and connected to the control device 60, a roller guide can preferably adjust the mixing ratio in the release agent mixture 10 or readjusting, for example, by adjusting an input voltage to the variable displacement pump so that the desired amount of second liquid 12 is provided to the static mixer 15.

In addition, it is provided that the first pump 13 'integrated in the first supply line is connected to a second actuation element 62 via the control device 60. By means of the second actuating element 62, an operating mode for the spraying device 70 can preferably be set by the roller guide. For example, the spraying device 70 can be switched on or off via the second actuating element 61 or operated in an interval mode, in particular during the operation of the rubber wheel roller 1. For this purpose, the control device 60 preferably switches on and / or off the first pump 13 'in the first supply line. Further, a bypass line 57 to the pump 13 'and another check valve 6 in the line part behind the bypass line 57 is present to prevent inadvertent promotion of release agent in the water path.

For the above variants, it is also possible that either the front and the rear rubber wheels each have a corresponding arrangement is provided. however, it is preferred if the front and rear rubber wheels are wetted together by a system for spraying the rubber wheels with release agent mixture.

Furthermore, a venting bypass 57 'is provided which connects the line section lying downstream of the pump 13' via a valve 3 '(in the present case a 2/2-way valve) to the second tank 12. Via this bypass line it is possible for the pump 13 "to be connected. , For example, after filling and / or insertion of the second tank 12, for venting purposes first depressurized into the tank 12 promotes. If the pump 13 "vented, the blocking of the vent bypass 57 'takes place by means of the valve.

It is according to the embodiment Fig. 4 with the two separately controlled pumps 13 'and 13 ", in which the mixing ratio is thus set by controlling the two pumps 13' and 13", further provided that here a tank monitoring by means of the control device 60 takes place. For this purpose, the energy consumption of the pumps 13 'and 13 "is monitored and if it suddenly drops, this is an indication that the respective tank 11 or 12 is empty, which is indicated to the operator via a suitable display device.

The FIGS. 5 to 7 show various arrangements of the second tank 22. Here, the second tank 12 in the in FIG. 4 illustrated arrangement in a free space 55, in particular in the region of the wheel well 56, arranged. For this purpose, the frame or the outer panel was partially hidden in the figure. Such an arrangement proves to be advantageous in that it allows free access to the second tank 22 via the clearance between rubber wheel 2 and wheel arch 56 - for example for draining the second fluid 12 - and at the same time the second tank 22 through the fairing of the rubber wheel roller 1 is protected from external environmental influences. In addition, the second tank 22 is arranged comparatively close to the spray device 70, whereby installation space and costs for otherwise necessary supply lines can be saved.

In the in FIG. 6 In contrast, the second tank 22 is arranged on the outside of the outer lining of the rubber wheel 1 from the outside. In particular, the second tank 22 is arranged in an assembled state on or next to a cover of the rubber wheel 1. Preferably, the second tank 22 is in the mounted state with at least one of its sides flush with a general course of the outer lining. Furthermore, it is preferably provided that the second tank 22 is temporarily mountable via a coupling device to the rubber wheel roller. By way of example, the coupling device is a latching or bracing device with which the coupling device can be temporarily or reversibly mounted on the outer lining. This advantageously permits removal and intermediate storage of the second tank 22 when the rubber wheel 1 is not in operation. Furthermore, it is conceivable that the second tank 22 comprises a viewing window, which advantageously provides the roller guide with information about the fill level of the second tank 22.

In the in FIG. 7 it is provided that the second tank 22 is disposed in a space close to the wheel well or below / next to the water tank and / or the water tank and the driver's cab 50 or below the driver's cab. In such an arrangement, the second tank 22 is protected from external environmental influences.

• Bereitstellen 41 einer erste Flüssigkeit 11 in einem ersten Tank 21 und einer zweiten Flüssigkeit 12 in einem zweiten Tank 22,
• Zuführen 42 der ersten Flüssigkeit 11 mit einer ersten Pumpe (13') und/oder der zweiten Flüssigkeit (12) mit einer zweiten Pumpe (13") zu einer Mischvorrichtung, wobei das Mischverhältnis von erster Flüssigkeit (11) und zweiter Flüssigkeit (12) in der Mischflüssigkeit mittels einer die erste Pumpe (13') und die zweite Pumpe (13") steuernden Steuereinrichtung (60) einer Regulierungsvorrichtung, insbesondere während eines Betriebs der Walze (1), eingestellt wird,
  • Mischen der ersten Flüssigkeit 11 und der zweiten Flüssigkeit 12 in der Mischvorrichtung während des Betriebs der Gummiradwalze und
• Besprühen des Gummirads 2 mit dem von der Mischvorrichtung bereitgestellten Trennmittelgemisch 10. Weiterhin ist es vorgesehen, das zum Bereitstellen der ersten Flüssigkeit 11 und der zweiten Flüssigkeit 12 der erste Tank 21 mit der ersten Flüssigkeit 11 und der zweite Tank 22 mit der zweiten Flüssigkeit 12 befüllt wird. Der Betrieb der Sprühvorrichtung und/oder der Mischvorrichtung erfolgt besonders bevorzugt in Abhängigkeit von ermittelten Temperaturwerten, insbesondere der Temperatur wenigstens eines der Gummiräder bzw. der Oberfläche eines Gummirades, der Außenumgebung und/oder des zu verdichtenden Asphalts. Dabei kann das dargestellte Verfahren insbesondere derart durchgeführt werden, dass die dargestellten Schritte automatisch bzw. selbsttätig von einer Steuereinheit dann ablaufen, wenn ein festgelegter Temperaturschwellenwert überschritten wird, und dann gestoppt werden, wenn ein festgelegter Temperaturschwellenwert unterschritten wird. Beim Zuführen der ersten und der zweiten Flüssigkeit ist ferner eine bevorzugte Weiterbildung darin zu sehen, dass das Mischverhältnis der ersten und der zweiten Flüssigkeit in Abhängigkeit wenigstens einer der vorstehend genannten Temperaturwerte verändert wird. Konkret erfolgt eine Steigerung des Anteils der zweiten Flüssigkeit im Trennmittelgemisch bei niedrigen bzw. sinkender Temperatur und umgekehrt.

In FIG. 8 FIG. 2 schematically illustrates a method of spraying a rubber wheel 2 according to an exemplary embodiment of the present invention. It is provided that, for example, be carried out with one of the rubber wheels 1 according to one of the previously described embodiments, the following steps:

• Providing 41 a first liquid 11 in a first tank 21 and a second liquid 12 in a second tank 22,
• Supplying 42 the first liquid 11 with a first pump (13 ') and / or the second liquid (12) with a second pump (13 ") to a mixing device, wherein the mixing ratio of the first liquid (11) and second liquid (12) in the mixing fluid by means of a control device (60) of a regulating device controlling the first pump (13 ') and the second pump (13 "), in particular during operation of the roller (1),
  • Mixing the first liquid 11 and the second liquid 12 in the mixing device during operation of the rubber wheel roller and
• Spraying the rubber wheel 2 with the release agent mixture 10 provided by the mixing device. Furthermore, it is provided that the first tank 21 is provided with the first liquid 11 and the second tank 22 with the second liquid 12 to supply the first liquid 11 and the second liquid 12 becomes. The operation of the spray device and / or the mixing device is particularly preferably carried out as a function of determined temperature values, in particular the temperature of at least one of the rubber wheels or the surface of a rubber wheel, the outside environment and / or the asphalt to be compacted. In this case, the illustrated method can in particular be carried out in such a way that the illustrated steps are automatically or automatically executed by a control unit when a defined temperature threshold value is exceeded, and then stopped when a defined temperature threshold value is undershot. When supplying the first and the second liquid, a further development is furthermore to be seen in that the mixing ratio of the first and the second liquid is changed as a function of at least one of the abovementioned temperature values. Specifically, there is an increase in the proportion of the second liquid in the release agent mixture at low or falling temperature and vice versa.

Claims (13)

Roller for asphalt compaction, in particular rubber wheel roller (1), comprising at least one rubber wheel (2), a spraying device for spraying the rubber wheel (2) with a release agent mixture (10) composed of a first liquid (11) and a second liquid (12), characterized,
in that it comprises a first tank (21) for the first liquid (11) and a second tank (22) for the second liquid (12) for mixing the separating agent mixture (10) with a mixing device for mixing the liquid from the first tank (21 1) and the second liquid (12) provided by the second tank (22) has (1) a first pump (13 ') for conveying the first liquid (11) from the first tank (21) Mixing device and / or a second pump (13 ") for conveying the second liquid (12) from the second tank (22) to the mixing device, that the mixing device comprises a regulating device for adjusting a mixing ratio in the release agent mixture (10) between the first liquid (11) and the second liquid (12), wherein the regulating device comprises a control device (60) which controls the first pump (13 ') and / or the second pump (13 "). Roller (1) according to claim 1,
characterized,
in that the control device (60) controls the regulating device with a first actuating element (61), in particular with a first actuating element (61) arranged in a driver's cab (50) of the rubber wheeled roller (1), and / or setting an operating mode of the spraying device with a second actuating device (62), in particular with one in the driver's cab (50) of the rubber wheel roller arranged second actuating element (62) is connected. Roller (1) according to one of the preceding claims,
characterized,
in that the rubber roller (1) for supplying the first liquid (11) has a first supply line which connects the first tank (21) to the mixing device and / or a second supply line which supplies the second liquid (12) ( 22) connects to the mixing device comprises. Roller (1) according to one of the preceding claims,
characterized,
in that the first pump (13 ') and / or the second pump (13 ") is a hose pump, a gear pump or a diaphragm pump. Roller (1) according to one of the preceding claims,
characterized,
in that the second tank (22) and the rubber wheel roller (1) are detachably connected to one another via a coupling device or have a drain for discharging the second fluid (12) from the second tank (22). Roller (1) according to one of the preceding claims,
characterized,
in that the second tank (22) is arranged to be accessible from the outside within a lining of the rubber wheel roller (1) or on an outer lining of the rubber wheel roller (1). Roller (1) according to one of the preceding claims,
characterized,
that the mixing device comprises a water jet pump (5) or a static mixer (15). Roller (1) according to claim 7,
characterized,
in that the static mixer (15) is connected to a drain for discharging the release agent mixture (10) from the static mixer (15). Roller (1) according to one of the preceding claims,
characterized,
in that the mixing device provides the spray mixture (10) to a plurality of spray devices (70), in particular a plurality of spray devices (70) for different rubber wheels (2). Roller (1) according to one of the preceding claims,
characterized,
that the wheel roller (1) has a measuring device for determining at least one of the following properties: Viscosity of the second liquid (12) Temperature of the second liquid (12) Fill level of the first tank (21), the second tank (22) and / or the static mixer (15), - temperature of the outside environment, - Temperature of one or more of the rubber wheels (2) or their surface and / or Temperature of the asphalt to be compacted, wherein the measuring device is preferably connected to the control device (40). A method for spraying a rubber wheel (2) of a roller (1) for asphalt compaction, in particular a roller (1) according to one of the preceding claims, with a release agent mixture, comprising the following steps: Providing (41) a first liquid (11) in a first tank (21) and a second liquid (12) in a second tank (22), Supplying (42) the first liquid (11) with a first pump (13 ') and / or the second liquid (12) with a second pump (13 ") to a mixing device, the mixing ratio of the first liquid (11) and the second liquid (12) in the mixing liquid being controlled by a control device (60) of a regulating device controlling the first pump (13 ') and the second pump (13''), in particular during operation of the roll ( 1), is set, - mixing (43) the first liquid and the second liquid in the mixing device to form a release agent mixture (10) during operation of the roll (1) and - spraying (44) the rubber wheel with the release agent mixture provided by the mixing device. Method according to claim 11,
characterized,
that the regulating device and / or the spraying device during operation of the roller (1), in particular depending on a viscosity or temperature of the second liquid (12) and / or in dependence on a temperature of at least one rubber wheel or its surface and / or in dependence a temperature of the asphalt to be compacted and / or a temperature of the external environment is actuated. Method according to one of claims 11 or 12,
characterized,
in that after the operation of the roller (1), the second fluid is discharged from the second tank (22) or the second tank (22) is released from the roller (1).

Images