EP2556194B1 - Dispositif pour générer de la mousse de bitume et procédé d'entretien de celui-ci - Google Patents

Dispositif pour générer de la mousse de bitume et procédé d'entretien de celui-ci Download PDF

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Publication number
EP2556194B1
EP2556194B1 EP11713688.7A EP11713688A EP2556194B1 EP 2556194 B1 EP2556194 B1 EP 2556194B1 EP 11713688 A EP11713688 A EP 11713688A EP 2556194 B1 EP2556194 B1 EP 2556194B1
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EP
European Patent Office
Prior art keywords
compressed air
inlet
bitumen
devices
reaction
Prior art date
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Application number
EP11713688.7A
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German (de)
English (en)
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EP2556194A2 (fr
Inventor
Juergen Heusinger
Andreas Nacke
Thorsten JÖRIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bomag GmbH and Co OHG
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Bomag GmbH and Co OHG
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Publication of EP2556194A2 publication Critical patent/EP2556194A2/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C3/00—Working-up pitch, asphalt, bitumen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
    • E01C19/17—Application by spraying or throwing
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply

Definitions

  • the present invention relates to a device for producing foamed bitumen for a road construction machine, comprising at least one mixing chamber having a reaction chamber in which hot bitumen and at least one reaction fluid can be brought together via an inlet device comprising at least one inlet nozzle and emptied out of the mixing device via an outlet device.
  • the present invention relates to a method of servicing such a device.
  • Such devices are needed, for example, in road construction machinery and in particular in recycling machines for road construction.
  • a road construction machine is for example in the WO 96/24725 described. It comprises a rotary chamber in which a revolving work roll is arranged, which is arranged to adjust to the surface to be machined usually height and inclination adjustable. In this rotary chamber, the milling of an existing floor covering, the crushing of the milled material, the addition of binders and in particular foamed bitumen, mixing and distribution and feeding to an applicator to form a new pavement occurs.
  • a device for producing such a binder, and in particular foamed bitumen for road construction machinery is known from WO 95/22661 known.
  • the device comprises at least one reaction chamber in which a mixing device is provided, in the hot bitumen at a Temperature of 180 ° C and water via injection nozzles under pressure are merge.
  • the device has a heatable foam reactor and heatable supply and distribution lines, wherein the lines can be additionally isolated.
  • Several nozzles are arranged side by side along a distribution line. This distribution line is connected via a pipeline network with a central foam reactor in which the bitumen foam is generated for all nozzles.
  • an agitator is arranged in this foam reactor.
  • the disadvantage of this device is that the foam reactor is very far away from the injectors, and so the already mixed foamed bitumen on the way to the nozzles partially disintegrates, so that among other things an accurate dosing of the foam is no longer possible.
  • foamed binders is therefore preferably hot bitumen, water of reaction and optionally air injected into a mixing device or a reaction chamber formed therein road construction machine and introduced from there directly into the rotation chamber.
  • the common injection leads to a mixing of the individual substances in the reaction chamber.
  • the water evaporates abruptly and leads to a bitumen foam, and thus to the desired increase in volume of the binder.
  • the addition of air in addition to the hot bitumen and water of reaction improves the distribution of the water, increasing the foam quality.
  • the finished foam bitumen can exit into the rotary chamber of the road construction machine, where it is mixed with the raw road material. This finished material mixture is then applied via a corresponding application and smoothing device as a new road surface on a substructure.
  • the mixing device thus comprises a reaction chamber into which at least parts of an inlet device and an outlet device open, for example a plurality of separate inlet nozzles for each reaction material to be processed into foamed bitumen.
  • an inlet device for example a plurality of separate inlet nozzles for each reaction material to be processed into foamed bitumen.
  • the outlet device usually comprises a fluid connection from the reaction chamber to the rotation chamber of the road construction machine, wherein here also an injection nozzle is used, through which the ready-mixed foamed bitumen is sprayed into the rotation chamber.
  • the entire reaction chamber including the inlet and outlet means, is in contact with bitumen in the manufacture of the foam bitumen.
  • bitumen in the manufacture of the foam bitumen.
  • the DE 297 02 162 U1 describes a device for producing foamed bitumen, in which for cleaning any clogged nozzles, a plunger per nozzle is provided, which can free a possibly added nozzle.
  • the disadvantage here is that this complicated wiring is necessary to create space for the cleaning cylinder.
  • the bitumen foam must first be diverted into a kind of secondary chamber until it then emerges into the rotary chamber of the road construction machine. The foam may already have lost quality due to this diversion.
  • the CN 201 092 654 Y describes an apparatus for foaming asphalt, in which the liquid asphalt transporting piping can be cleaned by a separate conveyor pumping a detergent-containing washing solution through the dirty pipes.
  • JP 2006 007136 A becomes a nozzle for applying a liquid asphalt emulsion pressurized with compressed air to detect a blockage based on the pressure curve.
  • a temperature sensor is used on a nozzle for applying a liquid asphalt emulsion to detect a blockage at the measured temperature.
  • the nozzles are pressurized with compressed air to remove an existing blockage.
  • the same compressed air line is used in the reaction chamber as in the introduction of the reaction air to disperse the asphalt emulsion, whereby only the outlet opening of the reaction chamber can be "blown".
  • Other facilities for the production of foamed bitumen are further from the EP 0 283 399 A1 and the DE 297 02 162 U1 known.
  • the disadvantages of the devices mentioned at the outset are that the cleaning devices for the inlet and outlet devices, in particular for added nozzles, entail a very complicated construction, with a previous test for perfect functioning of the inlet and outlet devices not being possible at all. The result is malfunction and lack of quality of the finished product.
  • the present invention is therefore an object of the invention to provide a device for producing foamed bitumen, which allows a more reliable production of foamed bitumen and is also cheaper and more reliable in their manufacture and operation.
  • this object is achieved by a device for producing foamed bitumen for a road construction machine, with at least one mixing chamber having a reaction chamber in which hot bitumen and at least one reaction fluid can be brought together via an inlet device and emptied from the mixing device via an outlet device, wherein at least one Compressed air device is provided, via which the inlet device for testing and / or cleaning purposes with a compressed air stream independently of the supply of the reaction chamber with compressed air for foaming the bitumen is acted upon, the air pressure of the compressed air for foaming the bitumen is lower than the air pressure of the compressed air Testing and / or cleaning purposes.
  • Foamed bitumen in the scope of the present invention is understood as meaning any material which finds its application as a road or similar floor covering and is assembled in a corresponding device. These include, inter alia, foamed bitumen, bitumen per se, but also foamed tar or the like binders to understand.
  • the term "hot bitumen” is understood as meaning any binding agent that changes its state of aggregation from liquid to solid or to a state that clogs the previously described inlet or outlet devices in the presence of a break in work or in principle at the end of a certain period.
  • inlet and outlet means is understood in each case to mean a compilation of the components which serve to guide the respective reaction products or building materials to and from the respective chambers, in particular thus piping systems with main and secondary lines, nozzles, valves, closures etc.
  • compressed air here means any fluid, but preferably breathing air, which is transportable via inlet or outlet devices and is particularly suitable for the admission of the inlet and outlet devices by means of a corresponding pressure device.
  • fluids with appropriate cleaning additives can find their application, wherein the cleaning additives are fed, for example via a detergent device in the compressed air stream.
  • a compressed air device which is designed such that it acts on the inlet means of the reaction chamber and optionally also the outlet of the reaction chamber and / or other coming into contact with bitumen components of the road construction machine allowed with compressed air.
  • it can be checked, in particular in conjunction with suitable measuring instruments, whether certain parts of the inlet or outlet devices, and in particular whether certain nozzles of the respective facilities clogged and, depending on the measuring devices used, and to what extent they are clogged.
  • such a device allows, as will be described in detail below, the cleaning of bitumen in Contact coming components and in particular the inlet or outlet device to preventively remove or in the constipation case bitumen or the like remains.
  • the detection of a blockage or the detection of the error-free functionality by a comparison of a Drucksollverlaufes done with the actually detected pressure profile.
  • the pressure profile is determined, for example, in a fault-free machine and stored in a machine memory, so that a newly detected pressure curve can be compared with this. If a certain deviation occurs here, this indicates a malfunction and in particular a clogging of the respective devices.
  • the inlet and / or outlet devices are subjected to the compressed air flow in succession.
  • the compressed air flow in succession.
  • the inlet and outlet devices also consist of a plurality of elements and in particular of a plurality of inlet nozzles or outlet nozzles, the application of compressed air takes place here in succession.
  • the inlet and outlet devices also consist of a plurality of elements and in particular of a plurality of inlet nozzles or outlet nozzles, the application of compressed air takes place here in succession.
  • a single admission of such small groups of components that a relatively accurate limitation of a fault location is possible.
  • a possible road construction machine consists of a total of 20 parallel-connected reaction chambers whose inlet devices each have a line system with one main line from a central reaction product reservoir, ie a bitumen reservoir, a water reservoir, etc, and from each of these branching secondary lines, each to a pointing into the reaction chamber bitumen nozzle , Water nozzle or air nozzle lead.
  • These total of 60 nozzles of the inlet devices according to the invention are subjected in each case in the test method in succession with compressed air.
  • cleaning measures can be initiated for the respective nozzle then considered to be "clogged" or "partially clogged".
  • the steps of the test method are carried out automatically when a break in operation and / or an end of operation or a similar operating state of the device is detected and / or when a specific component temperature is undershot.
  • Such breaks often lead to hardening of the material contained in the rotary chamber or reaction chamber of the device and thus to an increase in the risk of clogging of the respective device.
  • a falling below a certain component temperature of the device, for example, the respective nozzle temperature of the inlet and outlet devices increases the risk of clogging.
  • the test method is started according to the invention in order to prevent a malfunction of the machine. Since it is still easily possible, especially at the beginning of curing, to clean possibly added inlet or outlet devices, the "early" introduction of such a method is advantageous.
  • a cleaning process is carried out, wherein at the same time all or individual inlet or outlet devices are subjected to a compressed air flow.
  • all the inlet devices at the same time and then all outlet devices at the same time, or both devices can be acted upon simultaneously with a compressed air flow.
  • both the inlet and outlet devices and the reaction chamber and possibly the rotation chamber are freed of bitumen and the like raw material residues, so that a possibly beginning blockage is eliminated or, in principle, a blockage is prevented.
  • the respective inlet or outlet device can be "blown out".
  • a test procedure may proceed as follows.
  • a common compressed air supply pipe which is in fluid communication with the reaction water, bitumen and reaction air nozzles or can be brought, is pressurized with compressed air up to a certain maximum or test pressure.
  • all reaction water and reaction air nozzles of the inlet device are opened one after the other and monitored the change of the test pressure with a pressure sensor. If, within a specified period of time, a defined pressure drop, that is to say a pressure curve, conforms to a pressure setpoint course, the nozzle is not blocked, ie ready for operation.
  • test pressure remains, or if the nominal pressure is not reached within the specified time, a clogged reaction water or reaction air nozzle or a blockage of the downstream foam nozzle, that is, the outlet device, can be assumed. Since this procedure is carried out individually for all reaction water, bitumen and reaction air nozzles, it can be precisely determined in which reaction chamber there is a problem. Of course, it is also basically possible to start the test procedure for the respective devices or parts thereof by manual selection and to check certain components directly and bypassing an automatic procedure.
  • the compressed air device comprises at least one compressed air line, via which the compressed air can be transported from a compressed air generator or compressed air reservoir to at least part of the inlet device and / or the outlet device.
  • the compressed air device is in fluid communication via at least one control device and in particular a controllable valve device with the inlet device and / or the outlet device or the respectively to be acted upon parts of the respective device, so for example the respective inlet nozzles and / or outlet nozzles.
  • the control of the control device can for example be done manually, wired or wireless.
  • the control device it is possible to selectively pressurize the respective device or the respective component of the inlet device and / or the outlet device with compressed air.
  • the outlet device is also conceivable in the case of the outlet device.
  • control device can also be integrated into the inlet device or the outlet device such that it is possible to apply pressurized air via the line systems otherwise used to supply the respective reactants, for example water or bitumen.
  • a control device can be arranged in the supply line of the reaction chamber used for feeding in reaction water, which allows the targeted feeding of compressed air.
  • a central compressed air supply line is preferably provided, which is in fluid communication with the compressed air device and branch off from the individual compressed air supply secondary lines to the inlet and / or outlet devices, wherein the control devices are provided in the compressed air supply secondary lines.
  • compressed air can then be applied to the respective inlet and / or outlet devices or the respective components of the devices in a targeted manner.
  • At least one pressure sensor device is provided for detecting the pressure profile of the pressure flow in the inlet and / or outlet device.
  • a pressure sensor device can be provided for example in a central compressed air supply line, so that it is suitable for the detection of the pressure profile at each of the components to be tested of the inlet and / or outlet devices.
  • a central compressed air supply line with such a pressure sensor and a central closure valve, so that after the pressurization of the central compressed air supply line and the branching pressure supply secondary lines (with closed control devices to the respective pressure supply secondary lines) a complete completion of the compressed air system is possible.
  • the compressed air sensor indicates a constantly unchanged pressure curve.
  • at least one control device for example a valve at a nozzle of the inlet device, is then opened and the pressure profile at the pressure sensor is detected. As soon as the pressure curve here declines in conformity with a pressure setpoint curve, the respective component can be classified as functional.
  • the component must be classified as a fault component.
  • the respective control device is closed again, the valve is opened at the central compressed air supply, and compressed air is again introduced into the line system. Subsequently, the "compressed air test" is performed on another component or component group of the inlet and / or outlet device, and so on.
  • the reaction compressed air in which also compressed air is brought together as a reaction fluid via a reaction compressed air line to form the foam bitumen with the hot bitumen, the reaction compressed air preferably also forms at least partially the compressed air device.
  • the reaction fluid "compressed air” is meant any gaseous fluid that can be fed into the reaction chamber as a reaction product and can be used to form foamed bitumen.
  • a central compressed air supply line may also be a central reaction compressed air supply line.
  • control devices are then provided which feed the reaction compressed air of the reaction compressed air device into the respective components of the inlet or outlet devices, for example into the reaction water nozzles and the bitumen nozzles during the test method and optionally during the cleaning process.
  • a control device is provided, which is in operative connection with the control means of the mixing devices, that it allows the simultaneous or individual or group-wise loading of the inlet and / or outlet of the mixing chamber with the compressed air flow.
  • the control device is thus designed so that it allows, for example during the test method, the dedicated control of the respective components of the inlet or outlet device to be tested in order, for example, to check each individual nozzle of the inlet or outlet device.
  • the control device is also designed so that it allows the simultaneous or group-wise admission of the respective components with compressed air, as is advantageous for example in the cleaning process. To increase the respective cleaning pressure, the individual or grouped admission of components with compressed air is advantageous.
  • a control device possibly also the control device described above, which controls the activation and deactivation of the compressed air device and / or the control device allows in dependence of an activation and / or deactivation signal.
  • the automated design of the device according to the invention is possible.
  • the aforementioned activation and / or deactivation signals can be, for example, manual signals caused by the operator of the device, but also sensor signals which are detected by suitable sensors.
  • At least one operating sensor device is provided for this purpose, which detects the operating state of the device, in particular operating pauses and / or an operating end and / or a component temperature, and / or a manual activation and / or deactivation signal of the device or the like states or signals and detected Values are forwarded to the regulating device for generating the activation or deactivation signal for the at least one compressed air device and / or for activating the control devices.
  • the operating sensor device may therefore be, for example, an operating sensor which detects the temperature of one or more inlet nozzles. If the temperature falls below a certain nozzle temperature, an activation signal is sent to the regulating device, which then initiates a test method and / or a cleaning method.
  • said operating sensor device can also be a sensor element which detects a break in operation or an operating end of the device in order to initiate a cleaning and / or test method as a preventive measure against blockages.
  • Fig. 1 shows a schematic representation of a road construction machine and in particular a recycling machine for road superstructures from road construction.
  • the road construction machine 40 shown comprises a cutting wheel 42 in a rotation chamber 41, over which an existing old road surface 44 milled off, the milled material milled and can be processed into a new road surface 52.
  • the milled raw material 46 is mixed with foamed bitumen 2, so that a bonded Rohbelagsmaterial 48 results that can be applied by a smoothing device 50 of the road construction machine 40 based on the Altstrassenbelages 44 and smoothed to a finished road support layer 52 and compressed.
  • the final road surface and in particular an asphalt surface layer can be applied.
  • a mixing device 6 is arranged relative to the rotation chamber 41 such that in the mixing device 6 mixed foamed bitumen 2 can be sprayed directly onto the raw material 46.
  • an outlet device 16 of the mixing device 6 projects into the interior of the rotation chamber 41.
  • the outlet device 16 communicates with a reaction chamber 4 of the mixing device 6, in which raw materials of the finished foam bitumen 2 namely reaction fluids, such as water 12 and air 14, and bitumen 8 are mixed with one another.
  • reaction fluids 12, 14 and the bitumen 8 are injected via a corresponding inlet device 10 into the reaction chamber 4 of the mixing device 6.
  • the structure of the reaction chamber 4 of the mixing device 6 is shown in detail in FIG Fig. 2 shown.
  • the mixing device 6 comprises the reaction chamber 4, into which the inlet device 10 opens and from which the outlet device 16 branches off.
  • the inlet device 10 here has three inlet lines, namely a water inlet line 62, an air inlet line 64 and a bitumen inlet line 68.
  • Each inlet line comprises an inlet nozzle 60 which allows the need-based injection of the respective reaction fluids 12, 14 or the bitumen 8.
  • the respective inlet lines 62, 64, 68 and the inlet device 10 each have valves 70 which allow the control or regulation of the injected reaction fluid or bitumen quantities.
  • the injected water 12 is very finely divided, whereby it evaporates on contact with the hot bitumen 8 and forms a bitumen foam 2, which via an outlet 66 with outlet nozzles 67 of the outlet 16 of the Mixing device 6 and the reaction chamber 4 discharged and the rotation chamber 41 can be supplied.
  • a compressed air device 20 which allows a check of the permeability of the respective inlet and outlet devices and their cleaning.
  • the compressed air device 20 is in operative connection with the inlet device 10 and the outlet device 16 in such a way that it is possible to pressurize these devices and in particular the respective inlet lines 62, 64, 68, the outlet line 66 or the corresponding nozzles 60 and 67.
  • Both a test method and a cleaning method can be carried out via this compressed air device, as will be described in detail below.
  • the baffle plate 76 was provided in order for the bitumen, which was introduced into the expansion chamber with inlet line 68, not be able to escape directly through the outlet nozzle. As a result, the bitumen jet is atomized; The bitumen stays longer in the reaction chamber and can foam better.
  • a compressed air compressor 21 also supplies the reaction chamber 4 with compressed air via the air inlet ducts 64 independently of the devices for checking and maintaining the bitumen-contacting duct and nozzle components, this compressed air being used for foaming the bitumen. Since the required air pressure is lower than the air pressure for testing and cleaning purposes, in these air inlet lines 64 upstream of the reaction chamber 4, a pressure reducer 1 is installed, which in Fig. 1 is shown schematically.
  • Fig. 3a-c . 4 and 5 show a schematic representation of a test method for maintenance of the device described above.
  • the inventive device for producing foam bitumen for a road construction machine is shown only schematically here. For the sake of clarity, not all are previously in the Fig. 1 and 2 listed components listed. Shown are five mixing devices 6, in the reaction chambers 4, a plurality of reaction fluids 12, 14 and bitumen 8 are mixed to foam bitumen (see and below Fig. 1 and 2 ). As already mentioned, the reaction fluids 12, 14 and the bitumen 8 are injected via the inlet device 10 into the reaction chamber 4, where they are mixed and fed via the outlet device 16 to the rotation chamber 41 of the road construction machine 40. The sake of clarity is in the Fig. 3a-c . 4 and 5 only part of the inlet device 10, namely the water inlet line 62 for the reaction fluid water 12 shown. However, the method steps for testing the other parts 14, 8 of the inlet device 10 are identical.
  • each mixing device 6 or each reaction chamber and the inlet devices 10 and outlet devices 16 arranged thereon are in fluid communication with a compressed air device 20 via which testing and maintenance of the line and nozzle components coming into contact with bitumen is possible.
  • the compressed air device 20 has the compressed air compressor 21 or the like for compressed air supply, via which compressed air 23 can be guided via a central compressed air line 32 to compressed air secondary lines 34.
  • Each compressed air secondary line 34 opens into a control device 30, which allows in the form of a controllable valve, the feeding of the compressed air supplied via the compressed air device 20 compressed air into the respective inlet device, here the water inlet line 62.
  • water 12 see Fig. 2
  • compressed air 23 of the air compressor 21 is injected through the water inlet line 62 into the reaction chamber 4 when the valve is open.
  • two further main valves 72, 74 are present on the central compressed air line 32, the introduction and discharge of the compressed air 23 in the central compressed air line 32 and allow the compressed air side lines 34.
  • valve 74 it is also possible to permanently close the central compressed air line 32 at this end.
  • Fig. 3a the device for producing foam bitumen is shown schematically shortly before activation of the test method, ie here with the compressed air supply 20 deactivated or the compressed air compressor 21 deactivated.
  • valve 74 is closed, valve 72 is opened and compressed air 23 is supplied, so that the entire central compressed air line 32 is filled with compressed air 23. Since all control devices 30 of the respective mixing devices 6 are closed, builds as in the Fig. 3b and Fig. 3c represented, uniformly a pressure p on. This pressure can be read on a display 37 of a pressure sensor device 36. As soon as the required maximum pressure has been set in the central compressed air line 32 and the secondary compressed air lines 34, the valve 72 is closed (see Fig. 3c ), so that a completed system is formed. The display 37 of the pressure sensor 36 indicates a setpoint or test pressure p max in this state.
  • a diagnosis of the outlet device is also possible via the pressure profile at the pressure display 37. If, for example, after opening the control device 30, the pressure on the display device 37 briefly drops and then stagnates, this indicates that, although the water inlet line 62 and its nozzle 60 are continuous, the outlet device 16 or its outlet line 66 is blocked ( Fig.2 ). Depending on the size of the reaction chamber volume of the reaction chamber 4, the short-term pressure drop to be observed here is greater or smaller.
  • an activation signal can be output via a corresponding signaling device, for example to start a cleaning process, as will be described in detail below.
  • a compressed air blast is preferably applied via the compressed air device 20 simultaneously to all inlet devices 10 and / or outlet devices 16, so that the respective components are cleaned of adhering bitumen residues.
  • this method is performed at the beginning of a break, after certain working cycle lengths, or when converting the machine.
  • a blast of compressed air By applying a blast of compressed air, the respective components are "blown free". This free blowing leads not only to a cleaning of the respective lines and nozzles, but also to a purification of the reaction chamber 4 and possibly also the rotation chamber 41 per se.
  • control device (not shown), which is preferably integrated into the control system of the device according to the invention.
  • This control device can then receive signals about the operating state, the operating temperature, the cycle length, breaks, resumption of work or complete shutdown of the machine via appropriate operating sensors and then start appropriate testing or cleaning procedures. Also, corresponding manual signals can be passed to the control device by the operator of the machine.
  • Fig. 6 shows a schematic representation of another embodiment of the device according to the invention, in which case a mixing device 6 is shown with a reaction chamber 4, in which by means of an inlet device 10 reaction fluids (water 12 and air 14) and bitumen 8 are injected.
  • the reaction fluids 12, 14 and the bitumen 8 are again introduced into the reaction chamber 4 via corresponding inlet lines 62, 64, 68.
  • the supply of reaction compressed air 14 is thus ensured here via a reaction compressed air device 38, which generates its reaction compressed air 14 via a compressed air compressor 39
  • reaction compressed air device 38 now also forms the compressed air device 20, which serves to carry out the test and / or cleaning method according to the invention.
  • a control device 30 is provided in the air inlet secondary line 65, which allows compressed air 23 or reaction compressed air 14 in the remaining parts of the inlet device 10, namely the water inlet secondary line 63 and the bitumen inlet secondary line 69.
  • the reaction compressed air device 38 to a pressure sensor (not shown), in order to detect the pressure profile in the implementation of the respective test and cleaning steps. All other facilities previously necessary for the implementation of the method are then preferably provided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
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  • Mining & Mineral Resources (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Road Paving Machines (AREA)
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Claims (12)

  1. Dispositif pour la production de mousse de bitume (2) pour une machine (1) pour la construction de routes, comprenant au moins un dispositif malaxeur (6) ayant une chambre de réaction (4) dans laquelle du bitume chaud (8) et au moins un fluide réactionnel (12, 14) peuvent être mélangés via un dispositif d'entrée (10) et peuvent être déchargés du dispositif malaxeur (6) via un dispositif de sortie (16),
    caractérisé en ce que
    au moins un dispositif (20) à air comprimé est prévu, par l'intermédiaire duquel le dispositif d'entrée (10) peut être soumis à un flux d'air comprimé à des fins d'essais et/ou de nettoyage, indépendamment de l'alimentation en air comprimé de la chambre de réaction pour faire mousser le bitume, la pression de l'air comprimé pour faire mousser le bitume étant inférieure à la pression de l'air comprimé destiné à des essais et/ou au nettoyage.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    le dispositif (20) à air comprimé est, ou peut être amené, en communication fluidique avec le dispositif d'entrée (10) par l'intermédiaire d'au moins un dispositif de commande (30).
  3. Dispositif selon la revendication 2,
    une pluralité de dispositifs malaxeurs (6) étant prévue,
    caractérisé en ce que
    le dispositif (20) à air comprimé comprend une conduite centrale (32) d'air comprimé, d'où partent des conduites secondaires (34) d'air comprimé vers les dispositifs d'entrée (10) de la pluralité de dispositifs malaxeurs (6), les dispositifs de commande (30) étant disposés dans les conduites secondaires (34) d'air comprimé.
  4. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    au moins un dispositif capteur de pression (36) est prévu pour la détection de la courbe de pression du flux d'air comprimé dans le dispositif d'entrée (10).
  5. Dispositif selon l'une quelconque des revendications précédentes,
    de l'air comprimé (14) réactionnel étant mélangé au bitume chaud (8) dans la chambre de réaction (4) en tant que fluide réactionnel grâce à un dispositif (38) à air comprimé réactionnel,
    caractérisé en ce que
    le dispositif (38) à air comprimé réactionnel forme au moins une partie du dispositif (20) à air comprimé.
  6. Dispositif selon l'une quelconque des revendications 2 à 5,
    comportant une pluralité de dispositifs malaxeurs (6),
    caractérisé en ce que
    un dispositif de contrôle en boucle fermée est prévu, qui est en liaison opérationnelle avec les dispositifs de commande (30) de telle manière qu'il permette aux dispositifs d'entrée (10) d'être soumis au flux d'air comprimé soit simultanément, soit individuellement.
  7. Dispositif selon l'une quelconque des revendications 2 à 6,
    caractérisé en ce que
    un dispositif de contrôle en boucle fermée est prévu, qui permet l'activation et/ou la désactivation du dispositif (20) à air comprimé et/ou des dispositifs de commande (30) en fonction du signal d'activation et/ou de désactivation.
  8. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    au moins un système de capteur de fonctionnement est prévu, qui détecte l'état de fonctionnement du dispositif, en particulier des interruptions du fonctionnement, et/ou la fin du fonctionnement, et/ou une température d'un composant, et/ou un signal manuel d'activation et/ou de désactivation du dispositif, et envoie les valeurs détectées au dispositif de contrôle en boucle fermée afin de générer un signal d'activation et/ou de désactivation pour ledit au moins un dispositif (20) à air comprimé et/ou les dispositifs de commande (30).
  9. Procédé de maintenance d'un dispositif selon l'une quelconque des revendications précédentes, avec les étapes d'un processus d'essai suivantes :
    - soumission du dispositif (10) d'entrée à un flux d'air comprimé ;
    - détection de la courbe de pression du flux d'air comprimé dans le dispositif d'entrée (10) ; et
    - comparaison de la courbe de pression détectée avec une courbe de pression de référence prédéterminée, une déviation de la courbe de pression par rapport à la courbe de pression de référence indiquant un dysfonctionnement et en particulier un colmatage du dispositif d'entrée (10),
    caractérisé en ce que
    les étapes du processus d'essai sont réalisées automatiquement lorsqu'il est détecté une interruption du fonctionnement, et/ou la fin du fonctionnement, et/ou après des périodes d'utilisation spécifiques, et/ou pendant la manoeuvre de la machine et/ou une chute de température d'un composant spécifique.
  10. Procédé selon la revendication 9,
    une pluralité de dispositifs malaxeurs (6) étant prévue,
    caractérisé en ce que,
    dans le processus d'essai, les dispositifs d'entrée individuels (10) sont successivement soumis au flux d'air comprimé.
  11. Procédé selon l'une quelconque des revendications 9 à 10,
    caractérisé en ce que
    un processus de nettoyage est réalisé lors de la détection d'un dysfonctionnement dans le processus d'essai et/ou de manière préventive, avec les étapes suivantes :
    - soumission simultanée de l'ensemble et/ou soumission individuelle du/de chaque dispositif d'entrée (10) à un flux d'air comprimé.
  12. Procédé selon l'une quelconque des revendications 9 à 11,
    caractérisé en ce que
    le processus de nettoyage est réalisé automatiquement lors de la détection d'un dysfonctionnement, et/ou au démarrage du dispositif, et/ou lors de la détection d'une interruption du fonctionnement, et/ou de la fin du fonctionnement, et/ou après des périodes d'utilisation spécifiques, et/ou pendant la manoeuvre de la machine et/ou lors d'une chute de température d'un composant spécifique.
EP11713688.7A 2010-04-06 2011-04-06 Dispositif pour générer de la mousse de bitume et procédé d'entretien de celui-ci Active EP2556194B1 (fr)

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DE102010013982A DE102010013982A1 (de) 2010-04-06 2010-04-06 Vorrichtung zum Erzeugen von Schaumbitumen und Verfahren zu deren Wartung
PCT/EP2011/001710 WO2011124369A2 (fr) 2010-04-06 2011-04-06 Dispositif pour générer de la mousse de bitume et procédé d'entretien de celui-ci

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US20150275442A1 (en) 2015-10-01
WO2011124369A3 (fr) 2012-06-21
US9551116B2 (en) 2017-01-24
US9856611B2 (en) 2018-01-02
DE102010013982A1 (de) 2011-10-06
CN102892955B (zh) 2016-02-24
WO2011124369A2 (fr) 2011-10-13
EP2556194A2 (fr) 2013-02-13
CN102892955A (zh) 2013-01-23
US20130114367A1 (en) 2013-05-09

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