EP2811072A1 - Rail bed refurbishing machine with processing of the base grade protection layer - Google Patents

Abstract

The invention relates to a track rehabilitation machine, which is designed to excavate old ballast and Altplanumsschutzschicht (PSS) and to introduce a new course protective layer and a new ballast layer, wherein a first PSS treatment unit is present, which comprises a screening device for separating coarse fractions and fines, a A fraction conveying device is provided for conveying the fractions from a crusher to the screening device, and a return conveying device is provided for returning the coarse constituents which have been sifted out in the screening device into the crusher.

Description

The invention relates to a Gleiswegsanierungsmaschine, which is designed to excavate old ballast and Altplanumsschutzschicht (PSS) and introduce a new layer protection layer and a new ballast layer.

In particular, the invention relates to a track reconditioning machine comprising a first excavating device for excavating the existing ballast gravel, a second excavating device for excavating an existing formation protective layer or ground layer (hereinafter PSS) below the existing gravel layer, a first PSS conditioning unit having a first screening device for separating coarse and fine parts from the excavated PPS, a crusher for breaking the coarse matter crushed therefrom into fractions, a coarse-part conveying device for conveying the coarse-cut components from the first screen to the crusher, and a first old PSS conveying device for conveying the excavated debris layer from the second excavator to the first PSS conditioning unit, a second PSS conditioning unit for conditioning the excavated demister, which comprises a mixing device for mixing the excavated PSS with a treatment aggregate material and a fine particle conveying device for conveying fines from the first PSS processing unit to the second PSS processing unit

Another aspect of the invention is a trackside remediation method.

Track shunting machines of this type of operation are used to rehabilitate existing tracks. In this renovation, the substructure of the track, which typically consists of at least one layer of gravel, but usually also under the ballast layer lying layer protection layer, which is required for the sufficient carrying capacity, drainage ability and frost resistance of the track. This refurbishment is carried out in such a way that a track-bound track reconditioning machine is routed over the track when the track is in place. The track reconditioning machine rolls on a forwardly arranged chassis on the track and the old substructure and with a rear chassis on the track and the new track track substructure. Between the front and the rear chassis, the rehabilitation of the substructure is carried out in the suspended on a bridge between the front and rear chassis devices lift the track substructure and bring the new track substructure and compact. In this case, the track is usually lifted slightly and remains mounted with the thresholds, but could also be dismantled and mounted in the area between the front and rear chassis such a way that the sleepers are removed from the track, the track strands spread and passed by the side of the machine In order to bring them together again in the rear area of the bridge, the sleepers are to be mounted and laid down on the new track substructure. For certain other trackside remediation machines, the sleepers and / or the track strands may be replaced at the same time.

Track remoulding machines of this type are made, for example DE 198 07 677 C1 or off EP 2 025 810 B1 known. In these Gleiswegsanierungsmaschinen the track substructure is excavated by means of several chains, in particular according to EP 2 025 810 B1 is provided, the efficiency of the track remanufacturing machines be improved by the track track substructure is excavated by means of a total of three Aushubketten.

A fundamental problem associated with trackside remediation machines is the limitation on the speed of work that is achieved in track-laying. In order to reduce the downtime of a track track, as fast as possible track reassembly is sought and this can be achieved in particular if the track reassembly can be carried out at a high speed of the track reassembly and as few or no interruptions of the remedial drive. In the past, the problem of transporting the excavated old materials and bringing the newly introduced new materials into circulation has proved to be a limiting factor for this targeted fast track remediation. For the area of the ballast bed, a treatment technique has proven to be advantageous in some cases, in which the excavated old ballast is subjected to a treatment in the form of ballast refraction and thus sharpening of the old ballast. From this ballast treatment, at least a portion of the excavated old ballast can be recovered in such a way that it can be used as a new ballot and consequently the volumes of the old ballast to be removed and the approaching new ballast be partially reduced.

Approaches are also known from the state of the art for the area of the anti-fouling layer in order to achieve a reprocessing of the excavated materials in such a way that they can be used in the form of recycling for the new subsoil protective layer. That's how it is DE 20 2005 007 362 a method is known in which the excavated surface protection layer is prepared by solid materials such as clay, gypsum or lime are mixed with this layer and then the mixture created such type is introduced as a new PSS in the track again. Out EP 1 939 355 A1 is a track-laying machine known in which the PSS is also recycled. In this prior art, the problem has been addressed that with the previously known treatment facilities no sufficient capacity, In particular, with regard to dynamic loads, is achieved with such recycled layer protection layer and remedy is proposed here to introduce an additional mechanical damping layer.

In principle, it has been shown that with the known methods for track reassembly no protective cover layer with sufficient load-bearing capacity can be realized if in this case the excavated old material of the tarmac protective layer is used in the known manner. The present invention is basically concerned with the task of providing a device and a method which enables a more efficient track route rehabilitation.

Out EP2428612A1 For example, a track reclaiming apparatus and method is known in which excavated PSS material is sifted and crushed and thereafter mixed with a binder and water in a mixer. The thus prepared PSS material is then again introduced as a load-bearing layer in the track bed.

It has been shown that with the methods known in this way, the reuse of excavated material such as PSS material or ballast can be achieved up to a certain extent. However, this reuse is confronted with both technical and qualitative limits. Thus, with the known systems, only a quality of the processed material is achieved, which is sufficient for supporting and filling layers below the level protection layer, whereas the level protection layer itself must be made of new material, which must be carried in the track construction train. This limits the amount of recycled material, as only a limited volume of the recycled material can be processed as a carrier and filler layer, excess scrap must again be bunkered on the track train.

According to the inventor, an increase in the quality of the processed material can be achieved only with a significant wear of the treatment plants on the track construction train, in particular the mixer and the crusher require significantly reduced maintenance intervals when operating the known equipment to achieve increased quality of the recycled material. Such shortened maintenance intervals are not desirable, however, both because of the associated downtime of the entire track bed rehabilitation machine as well as the material required for this purpose, and ultimately a rapid track bed rehabilitation counterproductive.

The invention is based on the object to provide an apparatus and a method for a faster track rehabilitation than is possible with the known machines and methods, without thereby reducing the efficiency of the device or the method.

This object is achieved according to the invention with a Gleiswegsanierungsmaschine of the type described above, wherein the first PSS processing unit further comprises a second screening device for separating coarse fractions and fines, a fractional conveying device for conveying the fractions from the crusher to the second screening device, and a return conveyor for Returning the screened in the second screening coarse components in the crusher.

The solution according to the invention is based on an analysis of the problems of existing processing methods and machines. From this it has been found that with the methods which are known from the prior art, although in certain cases a qualitatively sufficient level protective layer can be achieved by the treatment mechanisms and laying techniques taught there, this can not be achieved over the entire length of a track track or for all Soil types is ensured. As a problem that leads to this deficit, it was identified that the quality of the excavated material over the length of a track path and in particular from site to site usually changed significantly.

In addition to the proportions of sandy, loamy or rocky components, this hinders rapid and efficient track rehabilitation In the excavated material, in particular, the shape and size of the rock components or the stony proportions exposed. Although these can be broken in a crusher, however, this processing is limited, because refraction into particularly fine components would require a design of the crusher, which has an efficiency-reducing effect. Also, even with large grain sizes after the treatment of the waste material, a bearing layer may be produced as a substructure under a PSS with the processed material, but the production of a recycled material having a quality suitable for the production of a PSS is either only through significant amounts of high quality aggregates, and associated significantly higher mixer use, or even impossible with currently available aggregates.

In accordance with the invention, the track remoulding machine, which is to be understood here in particular as a track-based track reconditioning machine, comprises two excavating devices, namely an excavating device for gravel lying in front in the working direction and an excavating device for the old PSS lying behind in the working direction, this second excavating device also being used for excavating in the previously explained manner is formed by existing in place of a PSS soil. In principle, it should be understood that it may be advantageous to also equip the track remover machine according to the invention with three or more excavation chains in order thereby to lift the layers of the track bed to be rehabilitated in a more selective manner and to recycle them in the machine.

Both the excavated ballast layer and the excavated old PSS is conveyed away within the track remover by corresponding conveyors of the excavation unit. These can then preferably be supplied to separate corresponding treatment facilities. The gravel layer can be subjected to screening and sharpening in order to obtain thereby prepared new ballast, whereby it is to be understood that the resulting ballast shares, which for example fall below a minimum size, also by means of a corresponding conveying device of the treatment unit can be supplied to the PSS to be installed in the new-to-be-introduced PSS.

The excavated waste PSS is first fed to a first treatment unit in which it can be sieved and / or broken, wherein it is particularly preferred to carry out the operations of sieving and crushing successively and only the screened out coarse constituents are fed to the crusher. The small components of the PSS produced in this way can then be supplied to the second processing unit, it being understood that any contaminated or sieved particles below a certain particle size may also be disposed of in a bunker hopper and not delivered to the second processing unit ,

Before the small components are supplied from the crusher of the second processing unit, they pass through a second screening device. This second screening device sieves grain sizes from the broken material, which lie above a predetermined grain size dimension and returns them to the crusher via a return conveyor. Only grains having a grain size below the predetermined grain size dimension are allowed to pass through the second screening device and are directed to the second processing unit. This re-screening and return into the crusher makes it possible to use a crusher which has a crusher characteristic which is adjusted so that broken or unbroken grains emerge from the crusher which are above the desired grain size. The concept is based on the knowledge that a crusher always has a design-typical distribution of the grain sizes emerging from the crusher, typically a Gaussian distribution. In order to ensure such a design of a crusher that emerge from the crusher no grain sizes above a predetermined grain size, this grain size distribution must be set such that the maximum of the grain sizes in the distribution has a significant distance from the predetermined grain size limit. This design is regularly with increased wear of the Crusher and a very high proportion of results associated with very small grain sizes.

In principle, it would indeed be possible to dispense with such a design of the crusher and to accept that occasionally larger grains above the grain size limit are also fed to the second processing unit and consequently installed in the new track bed. This can be compensated for example by appropriate additives to still achieve the desired properties of the support layer produced therewith. However, the inventor has recognized that this design method entails two disadvantages. On the one hand, the components of the second processing unit are subject to increased wear when grains of such increased grain size are supplied there. Both the design and the operation of the two processing units and in particular the mixer arranged therein is economically efficient and requires less maintenance if grains of a narrowly defined particle size range with a small grain size are processed therein. An interpretation of the crusher with the aim of reduced wear would therefore increased wear in the second processing unit, especially in the mixer, the result. On the other hand, in order to compensate for the coarse distribution of the grain sizes, a larger amount of aggregates and, moreover, often higher-quality aggregates must be added. This requires greater stockpiling on the train and the use of more expensive construction materials, both of which are detrimental to the efficiency and economics of the track bed rehabilitation measure being undertaken.

In this case, the second screening device may have a matching design for the first screening device, ie screen out grain sizes above a matching grain size limit and pass grains having a grain size below this grain size limit. In principle, it should be understood that both the first and the second screening device can also be designed as classifiers or sighting devices; the decisive factor here is the function of separating grains having a large grain size from the grains having a small grain size.

In the second processing unit, the old PSS material prepared in this way is then mixed with a liquid treatment fluid. For this purpose, a mixer is provided, in particular, it may be a two-shaft mixer, which causes both a homogenization of the old PSS material from the first processing unit as well as an intensive mixing of this material with the liquid treatment fluid.

In addition to these components, bunkered virgin materials can also be supplied to the mixer on the track rehabilitation train in order to replace spilled components of the old PSS and to provide the required volume. The anti-fouling layer material conveyed out of the mixer is applied, spread and compacted onto the milled soil sublayer by means of an infeed device to thereby provide a strong, drainable and frost-resistant fouling layer for a trackway that can support both high axle loads and high speeds. The ballast bed is then applied to the new PSS introduced in this way, the track is laid down, where appropriate after installation of the sleepers, and the ballast compacted in order to achieve reliable foundation of the sleepers in the ballast bed.

According to a first preferred embodiment, the track remanufacturing machine may be further developed by a second old PSS conveying device arranged to receive and convey the fine particles sifted out in the first screening device to the second screening device. In principle, it is possible to supply fines, which are screened out in the first screening device, directly to the second processing unit. According to the invention, these fine fractions can also be conveyed from the first screening device to the inlet of the second screening device and can pass through the second screening device. This makes it possible, on the one hand, to ensure that no grains above a predetermined particle size enter the second processing unit, even if they have passed through the first screening device and have been assigned to the small grain sizes. Furthermore, this material guide makes it possible that the first screening device with a different interpretation, In particular, a design with a higher grain size limit is operated and consequently by design already granules already passes with a grain size, which are above the intended for the second processing unit maximum grain size. These grains would be screened out in the second screen and fed to the crusher and then passed through to the second processing unit only if they are broken in the crusher to a grain size below the predetermined grain size limit of the second screen.

It may be provided in particular that the second old PSS conveying device and the fractional conveying device are integrally formed as an endless conveyor belt, on which fall at a first position, the fines from the first screening device and fall at a second position, the fractions of the breaker. As a result of this configuration, both the fine particles emerging from the first screening device and the fractions emerging from the crusher can be collected on a single, coherent conveying device and fed to the second screening device. It should be understood that under an endless conveyor belt and two or more directly behind the other and each feeding conveyor belts can be performed. In this case, any conveyors, such as chain conveyors, belt conveyors and the like come into consideration as an endless conveyor belt.

Furthermore, it is preferred that the fine particle conveying device (52) extends from the second screening device to the second PSS processing unit and is arranged to receive fines deposited in the second screening device and convey them to the second PSS processing unit. As a result, the grains falling out of the fine fraction outlet below the predetermined grain size limit can be conveyed to the second PSS processing unit with the fine particle conveying device, where they are fed to the inlet of the mixer.

According to a further preferred embodiment, it is provided that the first and the second screening device are integrally formed as a screening device are. In principle, it should be understood that the first screening device and the second screening device are separate and spaced-apart assemblies, and that corresponding conveying devices are necessary to convey materials between the first and second screening devices. In contrast, according to this preferred embodiment, it is provided to form the first and second screening device integrally on a screening device. This can basically be done in such a way that both the old PSS material which is fed to the first screening device and the fractions from the crusher exit which are fed to the second screening device are introduced through one and the same entrance into this integrally designed screening device and consequently also be supplied to a matching screening process. Deviating from this, however, the old PSS material and the fractions from the crusher outlet can also be supplied to two different inlets of the integrally designed screening device. For example, the old PSS material may be fed to an inlet of the integral screening device initially followed by coarse screening, followed by a finer screen, and the fractions from the crusher may be fed to a second inlet immediately adjacent to the finer screen of the integral screening device leads. This can also be done in an inverse embodiment, ie the fractions from the Brecherauslass are fed to an inlet, which leads to a screening with a small grain size limit, subsequently the non-sieved material is still a screening with a larger grain size limit in the integral screening supplied and the Alt PSS material is fed to an inlet which leads directly to the screening with a larger grain size limit.

According to a further preferred embodiment, a delivery line is provided for conveying a liquid treatment fluid from a fluid tank unit to the mixing device. Through this training, it is possible to supply the mixer also a liquid treatment fluid. This may be water, but also a binder liquid other than water with chemical additives or a conditioning fluid individually applied in a mixing control unit with a mixing ratio of two or more components, which is assembled, for example, depending on characteristics of the excavated PSS material and / or the processed material produced therefrom.

In accordance with yet another preferred embodiment, the track remediation machine of the present invention includes a PSS introduction device for introducing the new cover protection layer, and a ballast insertion device for introducing a new ballast layer. This training makes it possible, at the same time the track construction machine to install a new track bed and this materials that are processed or pre-stored on the track construction train to use. It should be understood that in particular conveying devices are provided which convey material prepared from the second PSS processing unit to the PSS introduction device. Furthermore, conveying devices may be provided which convey gravel sharpened from the ballast processing device to the ballast-loading device. Furthermore, corresponding conveying devices can be provided, which feed new ballast and new PSS material from bunker carriages which are carried along in the track construction train, this being able to be fed either directly to the ballast-loading device or to the PSS-introduction device, since, however, upstream mixing devices, which mix the new material with recycled waste material.

• eine Schotter-Aufbereitungseinheit zum Aufbereiten des ausgehobenen Schotters, umfassend einen Schotterbrecher und ein Schottersieb,
• eine Altschotter-Fördervorrichtung zum Fördern des ausgehobenen Schotters von der ersten Aushubvorrichtung zu der Schotter-Aufbereitungseinheit,
• eine Neuschotter-Fördervorrichtung zum Fördern der geschärften Grobbestandteile des aufbereiteten Schotters von der Schotter-Aufbereitungseinheit zu der Schotter-Einbringungsvorrichtung, und
• eine Schotterbruch-Fördervorrichtung zum Fördern der Kleinteile des aufbereiteten Schotters von der Schotter-Aufbereitungseinheit zu der ersten oder zweiten PSS-Aufbereitungseinheit.

According to a further preferred embodiment, it is provided that the track remedy according to the invention further comprises:

• a ballast processing unit for processing the excavated ballast, comprising a ballast crusher and a ballast screen,
• an old ballast conveyor for conveying the excavated ballast from the first excavator to the ballast processing unit,
• a new ballast conveying device for conveying the sharpened coarse components of the processed ballast from the ballast processing unit to the ballast injection device, and
• a ballast fracturing conveyor for conveying the small parts of the processed ballast from the ballast processing unit to the first or second PSS processing unit.

This training makes it possible to use material components that are no longer suitable for use in the new ballast bed due to their insufficient size for the new PSS, which advantageously ensures that these ballast small parts on the one hand not stored on the Gleiswegsanierungszug and, in addition, volume losses resulting from the PSS treatment can be compensated for by additions from the old ballast, which in turn can reduce or avoid the need to carry new material for the PSS. The small portions of the ballast can be supplied in particular directly to the mixer or the second screening device, but they can also be fed through the crusher of the first PSS treatment unit or the first screening device.

• Alt-PSS-Bunkerfördermittel zum Fördern von Teilen des ausgehobenen Planumsschutzschichtmaterials von der ersten PSS-Aufbereitungseinheit und/oder der zweiten Aushubeinrichtung zu einem Materialbunkerwagen und/oder
• Neu-PSS-Bunkerfördermittel zum Fördern von PSS-Neumaterial von einem Materialbunkerwagen zu dem Mischer der zweiten PSS-Aufbereitungseinheit.

For this purpose, it is particularly preferred that are still provided

• Old PSS bunker conveying means for conveying parts of the excavated surface protection layer material from the first PSS processing unit and / or the second excavating device to a material bunker wagon and / or
• New PSS bunker conveyor for pumping new PSS material from one material bunker truck to the second PSS conditioning unit mixer.

With such old PSS bunker conveyors, these non-reprocessable components of the old PSS can be removed from the processing path and transported by the track remover machine to a corresponding material bunker wagon which is carried along in the track remount train.

Likewise, virgin material entrained by appropriate new PSS bunker conveyors from the track rehabilitation train, such as sand, clay, gypsum, loam, gravel, or the like, may be supplied to the second PSS conditioning unit for incorporation into the mixer and for the new PSS to compensate for spilled volume fractions from the legacy PSS.

• eine Mischsteuerungseinheit,
• eine erste Anschlussleitung welche einen Fluidspeicher für ein Binderfluid mit der Mischsteuerungseinheit verbindet,
• eine zweite Anschlussleitung welche einen Wasserspeicher mit der Mischsteuerungseinheit verbindet,

wobei die Mischsteuerungseinheit ausgebildet ist, um ein Mischungsverhältnis zwischen dem zugeführten Binderfluid und dem zugeführten Wasser herzustellen und das Binderfluid-Wasser-Gemisch dem Mischer der zweiten PSS-Aufbereitungseinheit zuzuführen.According to a further, particularly preferred embodiment of the track remover according to the invention, it is provided that the delivery line for conveying a liquid treatment fluid from a fluid tank unit to the mixer comprises:

• a mixing control unit,
• a first connection line connecting a fluid reservoir for a binder fluid with the mixing control unit,
• a second connecting line which connects a water reservoir with the mixing control unit,

wherein the mixing control unit is configured to establish a mixing ratio between the supplied binder fluid and the supplied water, and to supply the binder fluid-water mixture to the mixer of the second PSS conditioning unit.

With this training, it is possible that during operation of the track reconditioning machine, the supplied treatment fluid changed in terms of its composition and thus to qualitatively different compositions the excavated old PSS is adjusted. For this purpose, in a mixing control unit, two liquids, on the one hand a binder fluid, which may substantially contain binder components, and on the other water, are combined and mixed with each other in an adjustable ratio. This mixture is then subsequently fed to the mixer where it is mixed with the solid constituents of the waste PSS and optionally supplied bunkered virgin materials. It has been found according to the invention that the proportion of water and its ratio to the binder content of a specific chemical binder liquid other than water has a significant influence on the quality of the processed PSS and this ratio is particularly suitable for adapting the treatment process to different qualities of the excavated PSS. Thus, in principle with excavated PSS having a high moisture content, the proportion of water which is fed to the treatment process can be reduced and with excavated PSS with high binding qualities, for example loamy soils, the proportion of binder fluid with binder contained therein can be reduced in order to prevent this the processed PSS is too moist, on the other hand to prevent the prepared PSS is too brittle.

Furthermore, it is preferable for the mixing control unit to be signal-technically coupled to a user input unit for inputting a soil condition feature and to set a predetermined, predetermined mixing ratio between water and binder fluid for this purpose from an electronic memory using a soil condition feature received from the user input unit.
With this development, it is achieved that the mixing control unit is controlled in such a way that, depending on a soil texture feature, the mixing ratio of the two liquids or optionally several liquids is controlled and such type is adapted to the soil condition. As soil texture feature here, for example, the density or the water content or soil type can be used, here with binary criteria such as sandy, loamy, rocky or percentage information of the ingredients can be used. Basically, it should be understood in that the user input unit may be located on the track rehabilitation machine itself, for example as a switch or lever that can be moved between two or more positions to thereby characterize and input the ground condition. In other embodiments, the user input unit may also be separated from the track remover, for example in the form of a computer unit which prepares a longitudinal profile of the ground conditions along the entire track track to be repaired based on data characterizing the ground conditions over the length of the track path, and data corresponding thereto generated, which may be used for the mixing control unit as input data to then pass this data to the mixing control unit. In this case, the mixing control unit can use these data in accordance with a further determined geographical position of the track remedy, for example by GPS sensors or a track distance measurement of the length covered, and set the corresponding mixing ratio in a spatially resolved.

It is even further preferred that the mixing control unit is signal-coupled to a soil condition sensor for detecting a soil condition feature, in particular with a soil condition sensor arranged and configured to detect the soil condition of the PSS material leaving the first PSS conditioning unit and from this To receive the floor texture feature received from the soil condition sensor from an electronic memory, a suitable, predetermined mixing ratio between water and binder fluid suitable for this purpose.

Such a soil condition sensor can be designed to provide a continuous measurement, which thus continuously records the soil quality, a quasi-continuous measurement, which thus records the soil quality at discrete, regularly successive times, or random sampling, which therefore only occasionally caused the user Performs a recording of soil quality performs time points. In this case, in particular, a sensor be used, which detects the density of the soil, the moisture content of the soil or other parameters, such as viscosity, bulk density or the like. In principle, the soil condition sensor can be designed and arranged to detect the ground condition before the old PSS is released, that is to say in a region of the track rehabilitation machine lying in the working direction in front of the second excavating device. Alternatively or additionally, however, the soil condition sensor may also detect the nature of the excavated bulk PSS material within the track remediation machine after passing through the first or second conditioning unit, and further or alternatively, a soil condition sensor may also detect the nature of the bottom of the newly loaded PSS before or after record their compression. Each of these sensor data provides an indication of the quality of the treatment process and can be used as a control input to regulate the mixing ratio of the raw materials of this treatment.

• mit einer Benutzereingabeeinheit zur Eingabe eines oder einem Bodenbeschaffenheitssensor zur Erfassung eines Bodenbeschaffenheitsmerkmals signaltechnisch gekoppelt ist, und
• ausgebildet ist, um anhand dieses empfangenen Bodenbeschaffenheitsmerkmals aus einem elektronischen Speicher ein hierzu geeignetes, vorbestimmtes Mischungsverhältnis zwischen dem dem Mischer zugeführten Flüssigbestandteil einerseits, bestehend aus Wasser und Aufbereitungsfluid und dem Festbestandteil andererseits, bestehend aus Planumsschutzschicht aus der ersten PSS-Aufbereitungseinheit und ggfs. zugeförderten PSS-Neumaterial, einzustellen.

According to a further preferred embodiment, it is provided that the mixing control unit

• is signal technically coupled to a user input unit for inputting a ground condition sensor for detecting a soil condition feature, and
• is formed, on the basis of this received soil quality feature from an electronic memory a suitable, predetermined mixing ratio between the liquid component supplied to the mixer on the one hand, consisting of water and treatment fluid and the solid component on the other hand, consisting of layer protection layer from the first PSS processing unit and possibly. Promoted PSS -Neumaterial, adjust.

According to this embodiment, not only the ratio of two or more different liquids introduced into the mixer is controlled in the mixing control unit, but also the ratio of the delivered liquid material to the delivered solids, that is, the amount of liquid introduced into the mixer and the amount of solids introduced into the mixer, especially the old PSS and any added bunkered virgin materials. This ratio may be controlled by volume or weight, and it is to be understood that in addition to this ratio of liquid and solid, a mixing ratio of the constituent components of the liquid portion and the constituent portions of the solids portion may be controlled to thereby adjust the conditioning operation in the second conditioning unit to optimally achieve the quality and condition of the excavated waste PSS material.

In this case, it is particularly preferred if the track remover is further developed by a mixing control unit, which is designed to set a mixing ratio between two or more different liquid components fed to the mixer and / or between a liquid and solid component fed to the mixer. With such a mixing control unit, a particularly good adaptability of the treatment process to different excavated soil types is achieved.

• einem Bodenradar zur Erfassung eines Bodenbeschaffenheitsmerkmals der PSS-Schicht in Arbeitsrichtung vor der zweiten Aushubeinrichtung,
• einem Gewichts-/oder Dichtesensor zur Erfassung des Gewichts oder der Dichte des ausgehobenen Planumsschutzschichtmaterials vor dem Durchlaufen der ersten oder zweiten Aufbereitungseinheit,
• einem Feuchtigkeitssensor zur Erfassung der Feuchtigkeit der ausgehobenen Planumsschutzschicht vor dem Durchlaufen der ersten oder zweiten Aufbereitungseinheit verbunden ist.

According to a further preferred embodiment, it is provided that the mixing control unit can be signaled with

• a ground radar for detecting a soil condition feature of the PSS layer in the working direction in front of the second excavating device,
• a weight or density sensor for detecting the weight or density of the excavated demister protective layer material prior to passing through the first or second conditioning unit,
• a moisture sensor for detecting the moisture of the excavated debris layer before passing through the first or second conditioning unit is connected.

With this embodiment, particularly preferred and meaningful features of the starting material are detected, which are crucial for the preparation of a high-quality new PSS and at the same time are detectable in a reliable manner sensor technology .. It is understood that one or more of these soil characteristics features can be used to control the mixing ratios in the conditioning process.

• Einem Bodenradar zur Erfassung eines Bodenbeschaffenheitsmerkmals der PSS-Schicht in Arbeitsrichtung hinter der PSS-Einbringvorrichtung,
• Einem Sensor zur Erfassung des Feuchtigkeitsgehaltes der PSS-Schicht in Arbeitsrichtung hinter der PSS-Einbringvorrichtung
• Einem Feuchtigkeitssensor zur Erfassung der Feuchtigkeit der ausgehobenen Planumsschutzschicht und/oder
• Einem Schwingungssensor, der an einem Verdichter zur Verdichtung der eingebrachten Neu-PSS angeordnet ist,

Still further, it is preferably provided that the mixing control unit with signaling technology

• A ground radar for detecting a soil condition feature of the PSS layer in the working direction behind the PSS insertion device,
• A sensor for detecting the moisture content of the PSS layer in the working direction behind the PSS insertion device
• A moisture sensor for detecting the moisture of the excavated surface protection layer and / or
• A vibration sensor disposed on a compressor for compressing the introduced new PSS,

is connected and based on one or more of these signals, a mixing ratio between two or more mixer supplied to the different liquid components and / or adjusted between a liquid and solid component supplied to the mixer.

With this training, as an alternative or in addition to the above-described detection of soil properties of the old PSS in the built or bulk state within the Gleiswegsanierungsmaschine the soil condition of the new PSS, so the prepared PSS recorded. This can take place by detecting soil properties of the new PSS layer material still inside the track rehabilitation machine, ie in particular between the second conditioning unit and the PSS introduction device. This can likewise be done by measurements on the introduced new PSS layer in the track bed itself, in particular before or after Compaction of this layer take place. This training makes it possible to control the control of the mixing ratio on the basis of the actually achieved quality of the new PSS and thus to use a quality final control as an input signal for this mixing control.

Finally, according to another preferred embodiment, it is provided that the first excavating device, the second excavating device, the PSS introducing device, and the ballast-loading device are attached to a bridge that extends between a front chassis and a rear chassis. With this embodiment, a preferred track-based trackside remediation machine is provided that allows track-to-track remediation with respect to a ballast bed and PSS to be completed and completed between a front and rear chassis, thus achieving a continuous track rehabilitation process.

Another aspect of the invention is a method for track remediation, comprising the steps of: excavating the old ballast of the existing ballast layer, excavating an existing old ballast protective layer, conditioning the excavated old ballast protective layer material in a mixer into a conditioned sheet protective layer material, introducing the processed one Anti-cladding layer material as a new leveling protective layer, and introducing a new ballast layer onto the intermediate layer, wherein the old leveling protective layer is prepared by sieving and / or crushing prior to preparation in the mixer as follows: feeding the Alt-level protective layer material to a first screening device, separating the Alt-level protective layer material in the first screening device in coarse fractions and fines, feeding the coarse fractions from the first screening device to a crusher, breaking the coarse fractions in the crusher in fractions, feeding the fractions from the crusher to a second S Separating the fractions in the second screening device in coarse fractions and fines, returning the coarse fractions from the second screening device in the crusher, and feeding the fines from the second screening device to the mixer.

This track rehabilitation process will enable highly efficient and cost-effective track remediation by recovering excavated waste, breaking down coarse fractions in this waste to a grain size that will enable high quality rebuild. The breaking of these coarse materials in the excavated waste PSS material takes place here in a multi-stage process, wherein a crusher is used, the output of a grain size controlling second screening device is fed to grains that are contained in these fractions and above a predetermined grain size limit to re-inflict the crusher. In conjunction with a first screening device, which filters out the coarse materials to be crushed from the old PSS material before the crusher and then only feeds these to the crusher, the crusher as well as the first and second screening device and in particular the subsequent second PSS can thereby Processing unit can be operated with a mixer in an economically efficient manner, without the design or due to the processed materials and grain sizes increased wear occurs in these assemblies.

With the Gleiswegsanierungsverfahren invention efficient and material-friendly track reassembly is made possible by reuse of the excavated material to a large or complete extent with different types of soil and in particular over the length of the track to be rehabilitated track types and soil compositions. This reuse is achieved through a differentiated and targeted treatment of the excavated material and a homogenization of the basic characteristics of the recycled soil fractions which are decisive for the viability of the new PSS.

The method according to the invention can be developed according to claims 14 and 15. With regard to these method developments, the specific definitions of terms, the preferred embodiments and modes of operation as well as advantages to the above description are used for execution This method trained track reconditioning machine reference.

Figur 1

einen vorderen Abschnitt einer erfindungsgemäßen Gleiswegsanierungsmaschine in einer schematischen, die relevanten Funktionselemente zeigenden Seitenansicht,

Figur 2

einen an den vorderen Abschnitt gemäß Figur 1 anschließenden vorderen Mittelabschnitt in einer gleichen Darstellungsweise wie Figur 1,

Figur 3

einen an den vorderen Mittelabschnitt gemäß Figur 2 anschließenden mittleren Mittelabschnitt in einer Darstellungsweise gemäß Figur 1, und

Figur 4

einen an den mittleren Mittelabschnitt gemäß Figur 3 anschließenden hinteren Mittelabschnitt in einer Darstellungsweise gemäß Figur 1, und

Figur 5

einen an den hinteren Mittelabschnitt gemäß Figur 4 anschließenden hinteren Abschnitt in einer Darstellungsweise gemäß Figur 1.

A preferred embodiment of the device according to the invention will be described with reference to the accompanying figures. Show it:

FIG. 1

a front portion of a Gleiswegsanierungsmaschine invention in a schematic, showing the relevant functional elements side view,

FIG. 2

one at the front section according to FIG. 1 adjoining front middle section in the same way as FIG. 1 .

FIG. 3

one to the front middle section according to FIG. 2 subsequent middle middle section in a representation according to FIG. 1 , and

FIG. 4

one to the middle middle section according to FIG. 3 subsequent rear middle section in a representation according to FIG. 1 , and

FIG. 5

one at the rear middle section according to FIG. 4 subsequent rear section in a manner of representation according to FIG. 1 ,

The track reconditioning machine shown in the figures comprises a gravel excavating chain 10, which is attached to a bridge (not shown) mounted on a front and rear chassis and extending between these chassis and projects downwardly so far into the trackbed to be rehabilitated that with this ballast excavating chain old ballast dug can be. The excavated gravel bed is conveyed by means of a ballast conveyor belt 11 to a screening device 12 and divided there into coarse and fine components. The fines are further conveyed from the screening device 12 by means of another ballast fine part conveying device 13 and can be conveyed to a Bunkerschüttgutwagen for temporary storage on the Gleiswegsanierungszug. From this, constituents or also the complete portion of the fines can be conveyed via a ballast fine particle feed device 14 for preparation, this will be referred to for further description.

The coarse constituents which emerge from the sieve device 12 are fed to a crusher 20 via a ballast bulk particle conveying device 15 where they are sharpened by refraction into smaller fractions. These fractions of this kind are fed to a further screening device 22 via a conveyor 21 and screened by the refraction resulting fines. These fines fall on the conveyor 13 and can be supplied to the intermediate storage or further processing in the manner previously described via the conveyor 13 or 14. The sharpened ballast portions above a predetermined minimum size are fed from the screening device 22 to a bulkhead infeeder 30 via a ballast conveyor 23 for processed ballast.

In the working direction behind the gravel excavation chain 10, a PSS excavation chain 40 is arranged. This PSS excavation chain 40 is also attached to the bridge and protrudes deeper into the track bed to be rehabilitated as the Schotteraushubkette 10. With this PSS excavation chain a PSS is excavated from the track bed to be rehabilitated, if such a PSS is present, otherwise under the already excavated gravel layer located soil excavated to a certain depth.

Attached to the PSS excavation chain 40 is a leveling unit 41 which levels and consolidates the soil subsurface exposed by the excavation of the PSS, which forms the foundation for the new PSS.

The excavated by the PSS excavation soil material is fed via a legacy PSS conveyor belt 42 a screening device 51, which is part of a first processing unit 50. Fine material screened out in the screening device 51 is fed by means of a PSS conveyor belt 55 to a second screening device 110. The PSS coarse material screened out in the screening device 51 is fed by means of a conveyor belt 53 to a crusher 54, which is likewise part of the first processing unit 50. The crushed PSS coarse material in the crusher is fed to a fractional conveyor belt 111. PSS conveyor belt 55 and fractional conveyor belt 111 are integrally formed by a single endless conveyor belt. The PPS fine material discharged therefrom from the screening device 51 and the comminuted PSS coarse material from the crusher 54 are fed together to the second screening device 110.

In the second screening device 110, the material thus supplied is subjected to a second screening. Grains having a grain size below a predetermined grain size limit are fed to the mixing device 60 by means of a PSS fine particle conveyor belt 52. Grains which have a grain size above this predetermined grain size limit are in turn supplied to the crusher 54 by means of a return conveyor 112. These sifted coarse components, which originate either from the first screening device 51 or from the crusher 54, are then subjected to a renewed refraction in the crusher 54 and are then again supplied as fractions of the second screening device 110. Coarse constituents which, after this second refraction in the crusher 54, still do not fall below the predetermined grain size limit are in turn fed to a further refraction in the crusher and basically circulate between the crusher and the second screening device until they have broken below the predetermined grain size limit.

The fine material exiting the second screen device 110 falls on the fine particle PSS conveyor belt 250 and includes grains of a very narrow grain size range. With this grain material processed in this way, a qualitatively high-grade, new material can be mixed in the mixer 90 in significantly reduced wear, which can be installed as a base course or as a PSS in the track bed.

Optionally, the excavated old PSS material can be completely removed by means of a conveyor 43 and spent to a entrained Bunkerschüttgutwagen.

As can further be seen, the conveyor 14 for fines from the old ballast or broken old ballast fines on the conveyor belt 111 and thus allows a screening, optionally repeated refraction and feeding these Schotterfeinanteile in the mixer for the production of new PSS material.

From Bunkerschüttgutwagen arranged in the rear train part new material is further promoted to the PSS Feinteilförderband 52 by means of a Neumaterialfördereinrichtung 55.

The two-shaft mixer 60 is further supplied via a liquid supply line 71, a treatment fluid. This conditioning fluid is mixed in a mixing control unit 70 of two components.

The mixing control unit 70 is supplied via a water supply line 72 water from a carried in the Gleiswegsanierungszug tanker 80 and fed via two treatment binder fluid conduits 73 a, b two components of a treatment binder from a likewise entrained second two containers 81 a, b tanker comprehensive. From these three starting liquids, the mixing control unit 70 mixes a conditioning fluid which has a correspondingly variable mixing ratio of these three starting materials and supplies this treatment fluid to the mixer 60 via the supply line 71.

At the same time, the mixing control unit 70 meters the volume flow and thus the total amount of the treatment fluid supplied to the mixer 60 through the supply line 71 and thereby controls the ratio of the mass of the supplied treatment fluid and the solids supplied to the mixer 60 via the conveyor 52 , For this purpose, the mixing control unit is connected to a combined sensor unit 90 for detecting the conveying speed and the loading weight, which detects what mass of conveying material from the screening device 51 and the crusher 54 is supplied to the mixer 60 per unit time.

The mixer 60 is designed and homogenized as a two-shaft mixer and mixes the liquids and solids supplied to each other. From the twin-shaft mixer 60, the type of treated new PSS material exits onto a PSS introduction device 100 and is applied by this introduction device to the previously leveled foundation plane. At the new PSS introduction device 100 compression and leveling devices 101 are arranged, with which the PSS is compacted after introduction.

The mixing control unit 70 is further signaled by a humidity and density sensor 91, which detects the moisture content and the density of the conditioned old PSS material fed to the mixer 60 on the conveyor belt 52 shortly before entering the mixer 60. Furthermore, the mixing control unit 70 is signal-coupled with a load-bearing sensor 92, which detects the load capacity by a quasi-continuous hardness measurement of the introduced and planed new PSS. From the type of such signaling transmitted information about the carrying capacity of the new PSS, the moisture content and the density of the supplied recycled old PSS material and the amount per unit time of the supplied old PSS material determined the mixing control unit based on data preliminarily stored therein, an optimum mixing ratio between the supplied water from the water tank 80 and the treatment binder fluid tank 81 and the mixing ratio between the conditioning fluid and the solids in the mixer, thereby achieving optimum quality of the new PSS.

The construction of the new track bed concludes with the introduction of the processed ballast through a Schottereinbringvorrichtung 30. It should be understood that following this, the track itself is optionally anchored by sleeper assembly and corresponding Einbringvorgänge in this ballast bed, the ballast is still compacted in a suitable manner and possibly alignment measures done to achieve an ideal track position on the new track bed.

Basically, it should be understood that new material can be additionally supplied both in terms of the new ballast bed to be introduced and in terms of the new PSS material to be introduced, which is carried along in corresponding bunker bulk goods wagons in the track rescue train and fed to the track remover by corresponding conveyor belts. This material is preferably supplied in such a way that it can be recorded with regard to the preparation of the new PSS and the related sensor-technical detection of the properties of the delivered material and thus taken into account in the mixing ratios.

Claims (15)

Track rehabilitation machine comprising a first excavating device (10) for excavating the ballast of the existing ballast layer, a second excavating device (40) for excavating an existing formation protection layer beneath the existing ballast layer, - A first PSS processing unit (50) with i. a first screening device (51) for separating coarse fractions and fines from the excavated surface protection layer, ii. a breaker (54) for breaking the screened coarse constituents out of the excavated protective layer into fractions, iii. a coarse-part conveying device (53) for conveying the screened coarse components from the excavated debris protection layer from the first screening device to the crusher, and a first old PSS conveying device (42) for conveying the dugout protective layer from the second excavating device (40) to the first PSS processing unit (50), a second PSS processing unit (60) for conditioning the excavated topsoil protective layer, which comprises a mixing device for mixing the excavated surface protective layer with a treatment aggregate material, - A fine part conveying device (52) for conveying fines from the first PSS processing unit to the second PSS processing unit
characterized in that the first PSS conditioning unit further comprises: a second screening device (110) for separating coarse fractions and fines, - A fraction conveying device (111) for conveying the fractions from the crusher (54) to the second screening device, and - A return conveyor (112) for returning the sifted in the second screening coarse components in the crusher (54). Track reconditioning machine according to claim 1, characterized by a second old PSS conveying device which is arranged to receive the fine particles sifted out in the first screening device and convey them to the second screening device. Track rehabilitation machine according to claim 2, characterized in that
the second old PSS conveying device and the fractional conveying device are integrally formed as an endless conveyor belt, on which at a first position the fines from the first screening device fall and at a second position the fractions fall from the crusher. A track rehabilitation machine according to any one of the preceding claims, characterized in that the fine particle conveyor (52) extends from the second screening means to the second PSS conditioning unit and is arranged to receive fines spilled in the second screening means and conveyed to the second PSS conditioning unit. Track rehabilitation machine according to claim 1, characterized in that
the first and second screening means are integrally formed as a screening device. Track rehabilitation machine according to one of the preceding claims, characterized by a delivery line (71) for conveying a liquid treatment fluid from a fluid tank unit to the mixing device. Track rehabilitation machine according to one of the preceding claims, characterized by - A PSS-introduction device (100) for introducing the new runway protective layer, and - A ballast-insertion device (30) for introducing a new ballast layer. Track rehabilitation machine according to one of the preceding claims, characterized by a ballast processing unit for processing the excavated ballast, comprising a ballast crusher (20) and a ballast screen (12), an old ballast conveying device (11) for conveying the excavated ballast from the first excavating device (10) to the ballast processing unit (12, 20), a new ballast conveyor device (23) for conveying the sharpened coarse components of the processed ballast from the ballast processing unit to the ballast injection device (30), and - A ballast fracturing conveyor (13, 14) for conveying the small parts of the processed ballast from the ballast processing unit to the first or second PSS processing unit. Track rehabilitation machine according to one of the preceding claims, characterized by - Old PSS bunker conveyor for conveying parts of the excavated layer protection layer material from the first PSS processing unit and / or the second excavating device to a material bunker wagon and / or New PSS bunker conveyor for conveying new PSS material from a material bunker truck to the second PSS conditioning unit mixer. Track rehabilitation machine according to one of the preceding claims, characterized by an aggregate conveying device for conveying a solid aggregate material from an aggregate bunker to the mixing device. Track remover according to the preceding claim,
characterized by mixing control unit, which is designed to produce a mixing ratio between the supplied treatment fluid, the supplied solid aggregate material, and the fines supplied to the mixer from the second screening device. Track rehabilitation machine according to claim 11,
characterized in that the mixing control unit (70) is signal technically coupled to a user input unit for inputting a soil condition feature and adapted to a predetermined, predetermined mixing ratio between the treatment fluid, the solid aggregate material and the fines based on a received from the user input unit soil condition feature from an electronic memory to adjust from the second screening device. Track rehabilitation method, with the steps - digging the old gravel of the existing gravel layer, - Excavation of an existing old surface protection layer, - conditioning the excavated Alt-runway protective layer material in a mixer to form a prepared layer protection layer material, - introducing the recycled layered protective layer material as a new surface protection layer, and Introduction of a new ballast layer onto the intermediate layer,
characterized in that the Alt-runway protective layer is prepared before processing in the mixer by sieving and / or breaking as follows: Feeding the old-course protective layer material to a first screening device, Separating the old-covering protective layer material in the first screening device into coarse fractions and fines, Feeding the coarse fractions from the first screening device to a crusher, Breaking the coarse fractions in the crusher in fractions, Feeding the fractions from the crusher to a second screening device, Separating the fractions in the second screening device into coarse fractions and fines, - Returning the coarse fractions from the second screening device in the crusher, and Feeding the fines from the second screening device to the mixer, Method according to claim 13, characterized by the steps - Feeding the fines from the first screening device to the second screening device and - Separate the fines from the first screening device in the second screening device in coarse fractions and fines. A method according to claim 13 or 14, characterized in that - The first and the second Siebveinichtung are designed as an integral screening device and - The old-runway protective layer material and the fractions are supplied from the crusher of the integral screening device via separate or a common conveyor.

Images