EP3556942A1 - Cutter for making a diaphragma wall and method of making such wall - Google Patents
Cutter for making a diaphragma wall and method of making such wall Download PDFInfo
- Publication number
- EP3556942A1 EP3556942A1 EP18167973.9A EP18167973A EP3556942A1 EP 3556942 A1 EP3556942 A1 EP 3556942A1 EP 18167973 A EP18167973 A EP 18167973A EP 3556942 A1 EP3556942 A1 EP 3556942A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- milling
- discharge
- cutting wheels
- trench wall
- wall cutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title description 2
- 238000005520 cutting process Methods 0.000 claims abstract description 94
- 238000003801 milling Methods 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000010926 purge Methods 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000011010 flushing procedure Methods 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 32
- 239000002689 soil Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000002262 irrigation Effects 0.000 claims 2
- 238000003973 irrigation Methods 0.000 claims 2
- 239000000284 extract Substances 0.000 claims 1
- 230000036346 tooth eruption Effects 0.000 description 9
- 230000018109 developmental process Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000013228 contact guidance Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/13—Foundation slots or slits; Implements for making these slots or slits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
- E02F3/22—Component parts
- E02F3/24—Digging wheels; Digging elements of wheels; Drives for wheels
- E02F3/248—Cleaning the wheels or emptying the digging elements mounted on the wheels, e.g. in combination with spoil removing equipment
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/08—Dredgers; Soil-shifting machines mechanically-driven with digging elements on an endless chain
- E02F3/10—Dredgers; Soil-shifting machines mechanically-driven with digging elements on an endless chain with tools that only loosen the material, i.e. with cutter-type chains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
- E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
- E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/08—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging wheels turning round an axis
Definitions
- the invention relates to a method for creating a Frässchlitzes in the ground with such a trench cutter, wherein in a milling operation, the cutting wheels are driven in rotation and the trench wall cutter sunken into the soil and soil material is milled, the Frässchlitz created in the ground, according to the preamble of Claim 11.
- From the EP 1 452 645 A1 is a trench wall cutter for creating a slot wall in the ground out. Between the two pairs of cutting wheels opens a feeding device, by means of which a settable liquid can be introduced into the milling slot in the area between the cutting wheels. The supplied settable liquid is thereby mixed by the rotational movement of the cutting wheels with the milled soil material to form a hardenable mass, which then harden to the slot wall segment can. In this known method, the milled soil material is mixed directly in situ in the milling slot to the curable composition.
- Another method for producing a trench wall segment in the ground is from the DE 41 41 629 A1 out.
- a discharge device is provided between the cutting wheels, with which the milled soil material is sucked directly with lawen in the milling slot supporting liquid to the surface.
- the extracted suspension can be de-enriched in a separator of soil material and returned to an upper portion of the Frässchlitzes.
- the suspension can be processed in such a way that it represents a hardenable mass which cures to the slot wall segment in the milling slot.
- the invention has for its object to provide a trench cutter and a method for creating a Frässchlitzes in the ground, with which a Frässchlitz can be made particularly efficient.
- the trench wall cutter according to the invention is characterized in that a switching device is provided, which is designed for switching the discharge device into a rinsing operation, in which a liquid flow generated by at least one discharge pump of the discharge device is generated on at least one cutting wheel for purging the cutting wheel.
- a basic idea of the invention is to use the discharge device for discharging the milling fluid, that is to say the milled ground material with the surrounding support fluid, at least partially for generating a fluid flow which is directed onto one, preferably all, cutting wheels in order to flush them free of adhering soil material ,
- a switching device is provided, with which the discharge device can be switched to a rinsing operation.
- a preferred embodiment of the invention is that at least one discharge pump is designed as an adjustable pump that is adjustable by a milling operation in which the discharge pump milling liquid from the cutting wheels in the flushing operation, in which the discharge pump in the reverse direction liquid to the Promotes cutting wheels.
- the adjustable pump is also referred to as a so-called swing-through pump, which can reverse the conveying direction.
- the switching device is essentially an electrical or electronic control device for changing the pump setting. This embodiment is structurally particularly simple.
- an intake opening above the discharge pump is formed with the control valve.
- milling fluid in the slot which is not or only slightly mixed with milled soil material, sucked and promoted by the switched Abrawpumpe to the cutting wheels. This way, the pump is protected.
- a suction element of the discharge device is arranged in a middle between the two cutting wheels and that flows in the flushing operation of the suction liquid in the direction of the cutting wheels.
- the cutting wheels are preferably rotatably mounted about a common axis of rotation.
- the axis of rotation is arranged in the milling operation in particular horizontally.
- the axes of rotation of the two pairs are arranged parallel or coaxially.
- the discharge device is arranged in the middle between the two cutting wheels, so that the milling fluid can be removed centrally and then fed centrally in the rinsing operation.
- a further preferred embodiment of the invention consists in that a flushing line arrangement with at least one flushing outlet is provided for flushing the at least one cutting wheel.
- a flushing line arrangement with at least one flushing outlet is provided for flushing the at least one cutting wheel.
- a special purge line arrangement with at least one purge outlet is provided.
- at least one flushing outlet, preferably several flushing outlets, are provided on all cutting wheels. It must be done so no or not alone a central flow when purging on the switched suction. Rather, a purge line arrangement with a specific number of purge outlets can be provided in a targeted manner.
- the switching device comprises a switching valve which connects a purge line of the discharge device with the purge line arrangement in the purge mode.
- the discharge pump can maintain its normal conveying direction of the milling operation.
- the switching valve By the switching valve, the upward flow in the discharge device can be deflected into the purge line arrangement, which then directs the liquid flow down.
- a particularly good flushing performance is achieved according to a development of the invention in that at least one second pump is provided which conveys liquid in the flushing operation via the flushing line arrangement to the at least one cutting wheel.
- a particularly advantageous embodiment is achieved in that the second pump is connected to the discharge line andorientanit in milling milling liquid upwards and that in the flushing operation, the second pump is connected via an adjusting valve of the switching device with the Spül effetsanix.
- the second pump can thus support the removal of milled soil material upwards through the discharge line.
- the second pump can be selectively used for flushing, this being achieved via a corresponding adjustable or Wegschwenkbare pump or solely by an adjustment valve.
- a particularly good flushing is also achieved according to a development of the invention in that a plurality of Spülauslässe are provided which are fan-shaped in the region of the at least one cutting wheel.
- a plurality of Spülauslässe are provided which are fan-shaped in the region of the at least one cutting wheel.
- the Spülauslässe may have one or more nozzle openings, so that targeted nozzles on the cutting teeth and in particular the gaps can be directed between the Fräs leopard whatsoever. It can be provided in a fan-like manner according to the numbers of annular spaces a plurality of Spülauslässen.
- the cutter is raised to interrupt the milling operation and thereby spaced from the upcoming milling ground. As a result, the milling operation is interrupted. Subsequently, in the rinsing operation, in particular for further rotating cutting wheels, the liquid flow in the direction of the cutting wheels can be generated, as a result of which the cutting wheels are freed of adhering soil material.
- control device free driving power of the cutting wheels can be transferred to the at least one pump in the purge mode.
- the Fig. 1 shows an overall view of a trench cutter 10 according to the invention with a box-like Fräsrahmen 12, at the lower end of two pairs of cutting wheels 14 are arranged.
- the cutting wheels 14 are rotating about a not shown Drive motor rotatably driven about mutually parallel horizontal axes of rotation.
- detachable cutting teeth 16 are arranged in a known manner on plate-shaped brackets, which can be milled with which pending in the milling operation on the slot bottom soil material.
- the milling slot is filled with a supporting liquid, which in Fig. 1 not shown.
- the milled soil material is sucked together with surrounding supporting liquid as milling liquid via a centrally arranged between the cutting wheels 14 suction 24 a discharge device 20.
- the suction element 24 is connected via a lower discharge line 26a to a discharge pump 22 of the discharge device 20 arranged on the frame.
- the discharge pump 22 generates the suction pressure for sucking the milling fluid.
- the sucked milling fluid is then removed via the discharge pump 22 further upwards via an upper discharge line 26c from the milling slot.
- the milling fluid can be prepared for days in a suitable facility, be de-enriched especially from milled soil material.
- the processed milling fluid can then be returned to the slot as support fluid.
- a holding device 18 is arranged at the upper end of the milling frame 20, at the upper end of the milling frame 20, a holding device 18 is arranged.
- the trench wall cutter 10 can be attached to a cable or a guide rod of a carrier device, not shown, and in particular thereby vertically moved.
- trench wall cutter 10 has, for example, a box-shaped milling frame 12, which is provided with lateral guide elements.
- the trench wall cutter 10 can lead itself in the slot.
- the milling frame 12 may also be formed compact and substantially without guide elements for contact guidance. The guide then takes place via an attached to the holding device 18 guide rod from outside the Frässchlitzes on the carrier device.
- a switching device 40 provided, with which in the illustrated embodiment, the trench wall cutter 10 can be switched from a milling operation in a rinsing operation for flushing the cutting wheels 14.
- the switching device 40 a control valve 42 between a central discharge line 26b and the upper discharge line 26c of the discharge device 20.
- the control valve 42 By means of the control valve 42, the upper discharge line 26c located above the control valve 42 is shut off and at the same time an intake opening 44 on the control valve 42 is released.
- the intake opening 44 is preferably located above the discharge pump 22 in an upper area of the milling frame 12 which is at a distance from the cutting wheels 14.
- the discharge pump 22 as an adjustable pump, also called Wegschwenkbare pump formed. Simultaneously with the actuation of the control valve 42, the discharge pump 22 is changed over in its conveying direction.
- the discharge pump 22 when opening the suction port 44, the discharge pump 22 from a milling operation, in which the discharge pump 22 promotes milling fluid from the cutting wheels 14 upwards, as clearly in Fig. 2 represented by arrows, in a rinsing operation according to Fig. 3 switched.
- the trench wall cutter 10 is raised, so that the cutting wheels 14 are spaced from the upcoming slot base.
- a flushing can be switched back by means of the control device in the milling operation, in which case then the cutter is lowered back to the slot base for milling further soil material.
- FIGS. 4 and 5 a second embodiment of a trench cutter 10 according to the invention is shown. It shows Fig. 4 the trench wall cutter 10 in the milling operation, in which the trench wall cutter 10 operates according to the first embodiment described above. Ground material removed by the cutting wheels 14 is sucked by the discharge device 20 with the discharge pump 22 via the suction element 24 and conveyed upwards.
- the conveying direction of the discharge pump 22 remains in the rinsing operation, which in Fig. 5 is shown schematically, unchanged.
- the switching device 40 has a switching valve 48.
- the switching valve 48 blocks the upper discharge line 26c of the discharge device 20 and connects the middle discharge line 26b with a purge line arrangement 60.
- the purge line arrangement 60 has one or more purge lines 62 which lead from the changeover valve 48 down to the cutting wheels 14.
- the flushing lines 62 terminate in nozzle-like flushing outlets 64, with which the milling fluid conveyed by the discharge pump 22 is led back again to the cutting wheels 14 in the area of the cutting teeth 16 for releasing adhering soil material.
- a simple discharge pump 22 can continue to be used.
- the discharge pump 22 according to the first embodiment according to the FIGS. 1 to 3 converted in their conveying direction.
- the discharge pump 22 is thus also designed as an adjustable or Wegschwenkbare pump.
- liquid is now flushed from an upper region of the slit or from the processing plant itself via the discharge pump 22 and the suction element 24 back in the direction of the cutting wheels 14.
- a second pump 30 is provided on the trimming frame 12.
- this second pump 30 can additionally convey, via a rinsing line arrangement 60 with a plurality of rinsing lines 62 and rinsing outlets 64, additionally liquid toward the cutting wheels 14 and free flow of adhering soil material.
- a flushing out takes place both from the direction of the suction element 24 and through additional flushing outlets 64 of the flushing line arrangement 60.
- FIGS. 7 and 8th A fourth embodiment of a trench wall cutter 10 according to the invention is in the FIGS. 7 and 8th shown.
- the trench wall cutter 10 is in accordance Fig. 7 in the milling operation, in which, similar to the embodiments described above, milled from the cutting wheels 14 soil material sucked together with liquid through the suction element 24 by a discharge pump 22 of a discharge device 20 and a lower, middle and upper discharge line 26a, b, c upwards is carried away.
- a second pump 30 is connected via a lower auxiliary line 28a and an adjusting valve 52 of a switching device 40 according to the invention.
- the additional line 28 is connected to a purge line 60 with flushing lines 62. In milling operation according to Fig. 7 However, there is no line connection between the additional line 28 and the Speller effetsan ist 60th
- the adjustment valve 52 connects the additional line 28 of the second pump 30 with the Spagit effetsan whatsoever 60.
- the second pump 30 which is designed as an adjustable pump, switched in its conveying direction by the switching device 40.
- the second pump 30 via the additional line 28 liquid from top to bottom in the Spagit effetsan whatsoever 60 lead, which leads to the cutting wheels 14.
- corresponding flushing outlets 64 at the ends of the flushing lines 62 an outside of the cutting wheels 14 can be targeted for flushing away adhering soil material.
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Abstract
Die Erfindung betrifft eine Schlitzwandfräse zum Erstellen eines Frässchlitzes im Boden mit einem Fräsrahmen, mindestens einem Paar von Fräsrädern, welche drehbar an einem unteren Ende des Fräsrahmens gelagert und angetrieben sind, wobei jedes Fräsrad entlang seines Außenumfangs eine Vielzahl von Fräszähnen aufweist, und einer Abführeinrichtung mit mindestens einer Abführpumpe zum Abführen einer Fräsflüssigkeit aus dem Frässchlitz im Bereich der Fräsräder. Gemäß der Erfindung ist eine Umschalteinrichtung vorgesehen, welche zum Umschalten der Abführeinrichtung in einem Spülbetrieb ausgebildet ist, in dem ein von mindestens einer Abführpumpe der Abführeinrichtung erzeugter Flüssigkeitsstrom auf mindestens ein Fräsrad zum Freispülen des Fräsrades erzeugt ist.The invention relates to a trench cutter for creating a Frässchlitzes in the ground with a Fräsrahmen, at least a pair of cutting wheels, which are rotatably mounted and driven at a lower end of the Fräsrahmens, each cutting wheel along its outer periphery having a plurality of Fräszähnen, and a discharge device with at least one discharge pump for discharging a milling fluid from the Frässchlitz in the field of cutting wheels. According to the invention, a switching device is provided which is designed to switch over the discharge device in a rinsing operation in which a liquid flow generated by at least one discharge pump of the discharge device is generated on at least one cutting wheel for purging the cutting wheel.
Description
Die Erfindung betrifft eine Schlitzwandfräse zum Erstellen eines Frässchlitzes im Boden mit einem Fräsrahmen, mindestens einem Paar von Fräsrädern, welche drehbar an dem Fräsrahmen gelagert und angetrieben sind, wobei jedes Fräsrad entlang seines Außenumfangs eine Vielzahl von Fräszähnen aufweist, und einer Abführeinrichtung mit mindestens einer Abführpumpe zum Abführen einer Fräsflüssigkeit aus dem Frässchlitz im Bereich der Fräsräder, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a trench wall cutter for creating a Frässchlitzes in the ground with a cutter frame, at least a pair of cutting wheels which are rotatably mounted and driven on the Fräsrahmen, each cutting wheel along its outer periphery having a plurality of Fräszähnen, and a discharge device with at least one discharge pump for discharging a milling fluid from the milling slot in the region of the cutting wheels, according to the preamble of claim 1.
Weiterhin betrifft die Erfindung ein Verfahren zum Erstellen eines Frässchlitzes im Boden mit einer solchen Schlitzwandfräse, wobei in einem Fräsbetrieb die Fräsräder drehend angetrieben werden und die Schlitzwandfräse in den Boden abgeteuft und Bodenmaterial abgefräst wird, wobei der Frässchlitz im Boden erstellt wird, gemäß dem Oberbegriff des Anspruchs 11.Furthermore, the invention relates to a method for creating a Frässchlitzes in the ground with such a trench cutter, wherein in a milling operation, the cutting wheels are driven in rotation and the trench wall cutter sunken into the soil and soil material is milled, the Frässchlitz created in the ground, according to the preamble of Claim 11.
Solche Schlitzwandfräsen werden zur Erstellung von sogenannten Schlitzwänden oder Dichtwänden eingesetzt, welche etwa zur Sicherung oder Abdichtung von Baugruben benötigt werden. Mittels einer Schlitzwandfräse wird dabei ein erster Frässchlitz erstellt, welcher mit einer aushärtbaren Masse verfüllt wird. Diese Masse härtet zu einem Schlitzwandsegment aus. Durch eine Aneinanderreihung mehrerer Schlitzwandsegmente kann so eine Schlitzwand in einer gewünschten Größe erstellt werden.Such trench wall cutters are used to create so-called slot walls or sealing walls, which are required for securing or sealing excavation pits, for example. By means of a trench cutter, a first trimming slot is created, which is filled with a curable material. This mass hardens to a slot wall segment. By juxtaposing a plurality of trench wall segments, a trench wall of a desired size can thus be created.
Aus der
Ein anderes Verfahren zum Herstellen eines Schlitzwandsegmentes im Boden geht aus der
Beim Erstellen eines Frässchlitzes mittels einer Schlitzwandfräse besteht grundsätzlich das Problem, dass beim Fräsen in bindigen Böden, also beispielsweise in Ton, Schluff, Tonstein etc., der durch die Fräsräder abgetragene Boden an den Fräszähnen der Fräsräder anhaftet und die Fräsräder so verkleben kann. Dies kann dazu führen, dass das Verkleben so stark ist, dass die Schlitzwandfräse aus dem Frässchlitz herausgezogen werden muss, um die Fräsräder mechanisch zu reinigen. Da Frässchlitze eine Tiefe von 80 Metern und mehr erreichen können, stellt dies einen hohen zeitlichen Aufwand und damit einen ökonomischen Nachteil dar. Die Tagesfräsleistung einer Schlitzwandfräse kann dadurch merklich herabgesetzt werden.When creating a Frässchlitzes means of a trench cutter, there is basically the problem that when milling in cohesive soils, ie, for example, in clay, silt, claystone, etc., the ground removed by the cutting wheels adheres to the cutting teeth of the cutting wheels and can glue the cutting wheels so. This can lead to the bonding being so strong that the trench wall cutter has to be pulled out of the trimming slot in order to mechanically clean the cutting wheels. Since cutting slots can reach a depth of 80 meters and more, this represents a high expenditure of time and thus an economic disadvantage. The daily milling performance of a trench wall cutter can thereby be markedly reduced.
Zum Lösen von anhaftendem Bodenmaterial zwischen ringförmigen Reihen von Fräszähnen an einem Fräsrad ist es etwa aus der
Aus der gattungsbildenden
Der Erfindung liegt die Aufgabe zugrunde, eine Schlitzwandfräse und ein Verfahren zum Erstellen eines Frässchlitzes im Boden anzugeben, mit welchen ein Frässchlitz besonders effizient hergestellt werden kann.The invention has for its object to provide a trench cutter and a method for creating a Frässchlitzes in the ground, with which a Frässchlitz can be made particularly efficient.
Die Aufgabe wird nach der Erfindung durch eine Schlitzwandfräse mit den Merkmalen des Anspruchs 1 beziehungsweise durch ein Verfahren mit den Merkmalen des Anspruchs 11 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den jeweils abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a trench cutter with the features of claim 1 or by a method having the features of claim 11. Preferred embodiments of the invention are specified in the respective dependent claims.
Die erfindungsgemäße Schlitzwandfräse ist dadurch gekennzeichnet, dass eine Umschalteinrichtung vorgesehen ist, welche zum Umschalten der Abführeinrichtung in einen Spülbetrieb ausgebildet ist, in welchem ein von mindestens einer Abführpumpe der Abführeinrichtung erzeugter Flüssigkeitsstrom auf mindestens ein Fräsrad zum Freispülen des Fräsrades erzeugt ist.The trench wall cutter according to the invention is characterized in that a switching device is provided, which is designed for switching the discharge device into a rinsing operation, in which a liquid flow generated by at least one discharge pump of the discharge device is generated on at least one cutting wheel for purging the cutting wheel.
Eine Grundidee der Erfindung besteht darin, die Abführeinrichtung zum Abführen der Fräsflüssigkeit, also des abgefrästen Bodenmaterials mit der umgebenden Stützflüssigkeit, zumindest teilweise zum Erzeugen eines Flüssigkeitsstromes zu nutzen, welcher auf ein, vorzugsweise alle Fräsräder gerichtet ist, um diese von anhaftendem Bodenmaterial frei zu spülen. Dabei ist eine Umschalteinrichtung vorgesehen, mit welcher die Abführeinrichtung in einen Spülbetrieb umschaltbar ist. Hierdurch kann der konstruktive und maschinelle Aufwand an einer Schlitzwandfräse geringgehalten werden, obwohl gleichzeitig ein gutes und zuverlässiges Freispülen der Fräsräder erreicht wird.A basic idea of the invention is to use the discharge device for discharging the milling fluid, that is to say the milled ground material with the surrounding support fluid, at least partially for generating a fluid flow which is directed onto one, preferably all, cutting wheels in order to flush them free of adhering soil material , In this case, a switching device is provided, with which the discharge device can be switched to a rinsing operation. As a result, the constructive and mechanical complexity of a trench wall cutter can be kept low, although at the same time a good and reliable flushing of the cutting wheels is achieved.
Eine bevorzugte Ausführungsform der Erfindung besteht darin, dass mindestens eine Abführpumpe als eine verstellbare Pumpe ausgebildet ist, die von einem Fräsbetrieb, bei dem die Abführpumpe Fräsflüssigkeit von den Fräsrädern absaugt, in den Spülbetrieb verstellbar ist, in dem die Abführpumpe in umgekehrter Richtung Flüssigkeit zu den Fräsrädern fördert. Die verstellbare Pumpe wird auch als eine sogenannte durchschwenkbare Pumpe bezeichnet, die die Förderrichtung umkehren kann. Die Umschalteinrichtung ist dabei im Wesentlichen eine elektrische oder elektronische Steuereinrichtung zum Wechseln der Pumpeneinstellung. Diese Ausführungsform ist konstruktiv besonders einfach.A preferred embodiment of the invention is that at least one discharge pump is designed as an adjustable pump that is adjustable by a milling operation in which the discharge pump milling liquid from the cutting wheels in the flushing operation, in which the discharge pump in the reverse direction liquid to the Promotes cutting wheels. The adjustable pump is also referred to as a so-called swing-through pump, which can reverse the conveying direction. The switching device is essentially an electrical or electronic control device for changing the pump setting. This embodiment is structurally particularly simple.
Eine vorteilhafte Weiterbildung besteht dabei darin, dass die Abführeinrichtung eine Abführleitung aufweist, welche sich von der mindestens einen Abführpumpe nach oben erstreckt, und dass die Umschalteinrichtung ein Stellventil an der Abführeinleitung umfasst, wobei mit dem Stellventil eine Ansaugöffnung an der Abführleitung geöffnet wird. Mit dem Stellventil wird zunächst sichergestellt, dass die Abführleitung nach oben gesperrt wird und bereits nach oben gefördertes Material nicht wieder zurück aus der Abführleitung nach unten gefördert wird. Die Abführleitung dient im normalen Fräsbetrieb maßgeblich dazu, das abgefräste Bodenmaterial zusammen mit Stützflüssigkeit als Suspension nach oben, insbesondere über Tage abzupumpen, wobei die Fräsflüssigkeit gefiltert und aufbereitet werden kann, um dann wieder in den Schlitz zurückgeleitet zu werden.An advantageous development consists in that the discharge device has a discharge line, which moves away from the at least one discharge pump extends above, and that the switching means comprises a control valve at the discharge introduction, wherein the control valve, a suction port is opened at the discharge line. With the control valve is first ensured that the discharge line is blocked upwards and already conveyed upwards material is not returned back from the discharge line down. The discharge line is used in the normal milling operation significantly to pump the milled soil material together with supporting liquid as a suspension upwards, especially for days, the milling fluid can be filtered and processed, and then returned to the slot again.
In einer zweiten Funktion wird mit dem Stellventil eine Ansaugöffnung oberhalb der Abführpumpe gebildet. Auf diese Weise kann Fräsflüssigkeit im Schlitz, welche nicht oder nur kaum mit abgefrästem Bodenmaterial durchmischt ist, angesaugt und durch die umgeschaltete Abführpumpe zu den Fräsrädern gefördert werden. So wird eine Schonung der Pumpe erreicht.In a second function, an intake opening above the discharge pump is formed with the control valve. In this way, milling fluid in the slot, which is not or only slightly mixed with milled soil material, sucked and promoted by the switched Abführpumpe to the cutting wheels. This way, the pump is protected.
Nach einer Weiterbildung der Erfindung ist es vorteilhaft, dass zwei Paare von Fräsrädern vorgesehen sind, dass ein Ansaugelement der Abführeinrichtung in einer Mitte zwischen den beiden Fräsrädern angeordnet ist und dass im Spülbetrieb aus dem Ansaugelement Flüssigkeit in Richtung der Fräsräder strömt. Die Fräsräder sind dabei vorzugsweise um eine gemeinsame Drehachse drehbar gelagert. Die Drehachse ist im Fräsbetrieb insbesondere horizontal angeordnet. Die Drehachsen der beiden Paare sind parallel beziehungsweise achsgleich angeordnet. Die Abführeinrichtung ist in der Mitte zwischen den beiden Fräsrädern angeordnet, so dass die Fräsflüssigkeit mittig abgeführt und im Spülbetrieb dann mittig zugeführt werden kann.According to a development of the invention, it is advantageous that two pairs of cutting wheels are provided, that a suction element of the discharge device is arranged in a middle between the two cutting wheels and that flows in the flushing operation of the suction liquid in the direction of the cutting wheels. The cutting wheels are preferably rotatably mounted about a common axis of rotation. The axis of rotation is arranged in the milling operation in particular horizontally. The axes of rotation of the two pairs are arranged parallel or coaxially. The discharge device is arranged in the middle between the two cutting wheels, so that the milling fluid can be removed centrally and then fed centrally in the rinsing operation.
Eine weitere bevorzugte Ausführungsvariante der Erfindung besteht darin, dass eine Spülleitungsanordnung mit mindestens einen Spülauslass zum Freispülen des mindestens einen Fräsrades vorgesehen ist. Bei dieser Ausführungsform wird also zusätzlich oder anstelle der bestehenden Abführleitung eine spezielle Spülleitungsanordnung mit mindestens einem Spülauslass vorgesehen. Bevorzugterweise sind an allen Fräsrädern mindestens ein Spülauslass, vorzugsweise mehrere Spülauslässe, vorgesehen. Es muss so keine oder nicht allein eine mittige Anströmung beim Spülen über das umgeschaltete Ansaugelement erfolgen. Vielmehr kann gezielt eine Spülleitungsanordnung mit einer bestimmten Anzahl von Spülauslässen vorgesehen werden.A further preferred embodiment of the invention consists in that a flushing line arrangement with at least one flushing outlet is provided for flushing the at least one cutting wheel. In this embodiment, therefore, in addition to or instead of the existing discharge line, a special purge line arrangement with at least one purge outlet is provided. Preferably, at least one flushing outlet, preferably several flushing outlets, are provided on all cutting wheels. It must be done so no or not alone a central flow when purging on the switched suction. Rather, a purge line arrangement with a specific number of purge outlets can be provided in a targeted manner.
Besonders bevorzugt ist es dabei, dass die Umschalteinrichtung ein Umschaltventil umfasst, welches im Spülbetrieb eine Abführleitung der Abführeinrichtung mit der Spülleitungsanordnung verbindet. Bei einer solchen Anordnung kann die Abführpumpe ihre normale Förderrichtung des Fräsbetriebes beibehalten. Durch das Umschaltventil kann der nach oben gerichtete Förderstrom in der Abführeinrichtung in die Spülleitungsanordnung umgelenkt werden, welche dann den Flüssigkeitsstrom nach unten leitet. Diese Ausbildungsvariante ist besonders einfach und robust.It is particularly preferred that the switching device comprises a switching valve which connects a purge line of the discharge device with the purge line arrangement in the purge mode. With such an arrangement, the discharge pump can maintain its normal conveying direction of the milling operation. By the switching valve, the upward flow in the discharge device can be deflected into the purge line arrangement, which then directs the liquid flow down. This training variant is particularly simple and robust.
Eine besonders gute Spülleistung wird nach einer Weiterbildung der Erfindung dadurch erzielt, dass mindestens eine zweite Pumpe vorgesehen ist, die im Spülbetrieb Flüssigkeit über die Spülleitungsanordnung zu dem mindestens einen Fräsrad fördert. Durch die mindestens eine zweite Pumpe oder durch mehrere Pumpen kann ein besonders intensiver Spülstrom erzeugt werden, mit dem besonders zuverlässig anhaftendes Bodenmaterial von den Fräsrädern freigespült wird.A particularly good flushing performance is achieved according to a development of the invention in that at least one second pump is provided which conveys liquid in the flushing operation via the flushing line arrangement to the at least one cutting wheel. By means of the at least one second pump or by a plurality of pumps, a particularly intensive flushing flow can be generated, with which particularly reliably adhering soil material is flushed free of the cutting wheels.
Dabei wird eine besonders vorteilhafte Ausführungsvariante dadurch erreicht, dass die zweite Pumpe an der Abführleitung angeschlossen ist und im Fräsbetrieb Fräsflüssigkeit nach oben abfördert und dass im Spülbetrieb die zweite Pumpe über ein Verstellventil der Umschalteinrichtung mit der Spülleitungsanordnung verbunden wird.In this case, a particularly advantageous embodiment is achieved in that the second pump is connected to the discharge line and abzufördert in milling milling liquid upwards and that in the flushing operation, the second pump is connected via an adjusting valve of the switching device with the Spülleitungsanordnung.
Im Fräsbetrieb kann so die zweite Pumpe das Abfördern von abgefrästem Bodenmaterial nach oben durch die Abführleitung unterstützen. Im Spülbetrieb kann die zweite Pumpe gezielt zum Freispülen eingesetzt werden, wobei dies über eine entsprechende verstellbare oder durchschwenkbare Pumpe oder allein durch ein Verstellventil erzielt wird.In milling operation, the second pump can thus support the removal of milled soil material upwards through the discharge line. In the flushing operation, the second pump can be selectively used for flushing, this being achieved via a corresponding adjustable or durchschwenkbare pump or solely by an adjustment valve.
Ein besonders gutes Freispülen wird zudem nach einer Weiterbildung der Erfindung dadurch erzielt, dass mehrere Spülauslässe vorgesehen sind, welche fächerförmig im Bereich des mindestens einen Fräsrades angeordnet sind. Insbesondere beim Abfräsen von bindigen Böden werden Fräsräder eingesetzt, bei denen die Fräszähne in axial zueinander versetzten ringförmigen Fräszahnreihen am Außenumfang eines Fräsrades angeordnet sind. Zwischen den ringförmigen Fräszahnreihen werden ringförmige Zwischenräume gebildet, in welche die düsenartigen Spülauslässe gerichtet sind. Die Spülauslässe können eine oder mehrere Düsenöffnungen aufweisen, so dass gezielte Düsenstrahlen auf die Fräszähne und insbesondere die Zwischenräume zwischen den Fräszahnreihen gerichtet werden können. Es können dabei eine Vielzahl von Spülauslässen fächerartig entsprechend den Anzahlen der ringförmigen Zwischenräume vorgesehen sein.A particularly good flushing is also achieved according to a development of the invention in that a plurality of Spülauslässe are provided which are fan-shaped in the region of the at least one cutting wheel. In particular, when milling cohesive soils cutting wheels are used in which the cutting teeth are arranged in axially offset from each other annular Fräszahnreihen on the outer circumference of a cutting wheel. Between the annular Fräszahnreihen annular spaces are formed, in which the nozzle-like Spülauslässe are directed. The Spülauslässe may have one or more nozzle openings, so that targeted nozzles on the cutting teeth and in particular the gaps can be directed between the Fräszahnreihen. It can be provided in a fan-like manner according to the numbers of annular spaces a plurality of Spülauslässen.
In einer einfachen Ausgestaltung können die Spülauslässe fest sein. Insbesondere zur Einstellung an veränderte Böden und Zahnanordnungen ist es nach einer Weiterbildung der Erfindung bevorzugt, dass der mindestens eine Spülauslass als eine verstellbare Düse ausgebildet ist. Es kann dabei beispielsweise eine Kugeldüse vorgesehen sein, die mittels einer entsprechenden Überwurfmutter in einer eingestellten Position festgespannt werden kann.In a simple embodiment, the Spülauslässe can be fixed. In particular, for adjustment to modified floors and tooth arrangements, it is preferred according to a development of the invention that the at least one flushing outlet is designed as an adjustable nozzle. It may be provided, for example, a ball nozzle, which can be tightened by means of a corresponding nut in a set position.
Das erfindungsgemäße Verfahren ist dadurch gekennzeichnet, dass in einem Spülbetrieb die Schlitzwandfräse angehoben wird und die Fräsräder von einem Fräsgrund des Bodens beabstandet werden und dass in der angehobenen Position der Fräsräder ein Flüssigkeitsstrom in Richtung der Fräsräder zum Freispülen erzeugt wird. Das Verfahren kann dabei insbesondere mit der zuvor beschriebenen Schlitzwandfräse nach der Erfindung ausgeführt werden. Es können die zuvor beschriebenen Vorteile erzielt werden.The inventive method is characterized in that in a rinsing operation, the trench wall cutter is raised and the cutting wheels are spaced from a milling base of the soil and that in the raised position of the cutting wheels, a liquid flow is generated in the direction of the cutting wheels for flushing. The method can be carried out in particular with the previously described trench wall cutter according to the invention. The advantages described above can be achieved.
Die Fräse wird zum Unterbrechen des Fräsbetriebes angehoben und dadurch vom anstehenden Fräsgrund beabstandet. Schon hierdurch ist der Fräsbetrieb unterbrochen. Anschließend kann in dem Spülbetrieb, insbesondere bei weiterdrehenden Fräsrädern, der Flüssigkeitsstrom in Richtung auf die Fräsräder erzeugt werden, wodurch die Fräsräder von anhaftendem Bodenmaterial freigespült werden.The cutter is raised to interrupt the milling operation and thereby spaced from the upcoming milling ground. As a result, the milling operation is interrupted. Subsequently, in the rinsing operation, in particular for further rotating cutting wheels, the liquid flow in the direction of the cutting wheels can be generated, as a result of which the cutting wheels are freed of adhering soil material.
Zum Rückziehen der Schlitzwandfräse ist es besonders bevorzugt, dass an einem oberen Ende der Schlitzwandfräse ein Seil oder eine Stange angebracht ist, mit der die Schlitzwandfräse an einem Trägergerät aufgehängt und vertikal verstellt wird. Hierdurch lässt sich eine effiziente Hubbewegung der Schlitzwandfräse bewirken.For retraction of the trench wall cutter, it is particularly preferred that a cable or a rod is attached to an upper end of the trench wall cutter with which the trench wall cutter is suspended from a carrier device and vertically adjusted. This can cause an efficient lifting movement of the trench wall cutter.
Weiterhin ist es nach einer Ausführungsvariante des erfindungsgemäßen Verfahrens vorteilhaft, dass mittels einer Steuereinrichtung im Spülbetrieb ein Einspritzdruck und/oder eine Einspritzmenge der Flüssigkeit zum Freispülen der Fräsräder eingestellt werden. Das Freispülen kann insbesondere mit einem erhöhten Druck, der zwischen 2 bar bis 40 bar liegt, bewirkt werden. Grundsätzlich können auch höhere Drücke eingestellt werden, abhängig von dem zu fräsenden Bodenmaterial. Durch eine Einstellung von Einspritzdruck und/oder Einspritzmenge kann in möglichst effizienter Weise eine Reinigung der Fräsräder erzielt.Furthermore, it is advantageous according to an embodiment variant of the method according to the invention that an injection pressure and / or an injection quantity of the liquid for flushing the cutting wheels are adjusted by means of a control device in the purging operation. The flushing can be effected in particular with an increased pressure, which is between 2 bar to 40 bar. Basically, higher pressures can be set depending on the material to be milled. By adjusting the injection pressure and / or injection quantity, cleaning of the cutting wheels can be achieved in the most efficient manner possible.
Das Ergebnis des Freispülens kann mittels der Steuereinrichtung durch eine Feststellung der Änderung der benötigten Antriebsleistung der Fräsräder ermittelt und überprüft werden.The result of the free purging can be determined and checked by means of the control device by determining the change in the required drive power of the cutting wheels.
Durch die Steuereinrichtung kann auch im Spülbetrieb freie Antriebsleistung der Fräsräder auf die mindestens eine Pumpe übertragen werden.By the control device free driving power of the cutting wheels can be transferred to the at least one pump in the purge mode.
Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen näher erläutert, welche schematisch in den Zeichnungen dargestellt sind. In den Zeichnungen zeigen:
- Fig. 1
- eine schematische Vorderansicht einer ersten erfindungsgemäßen Schlitzwandfräse;
- Fig. 2
- eine vergrößerte Detailansicht der Schlitzwandfräse von
Fig. 1 in einem Fräsbetrieb; - Fig. 3
- eine Ansicht der Schlitzwandfräse von
Fig. 2 in einem Spülbetrieb; - Fig. 4
- eine schematische Ansicht einer weiteren erfindungsgemäßen Schlitzwandfräse im Fräsbetrieb;
- Fig. 5
- eine Ansicht der Schlitzwandfräse von
Fig. 4 in einem Spülbetrieb; - Fig. 6
- eine schematische Ansicht einer dritten erfindungsgemäßen Schlitzwandfräse in einem Spülbetrieb;
- Fig. 7
- eine schematische Ansicht einer vierten erfindungsgemäßen Schlitzwandfräse im Fräsbetrieb und
- Fig. 8
- eine Ansicht der Schlitzwandfräse von
Fig. 7 im Spülbetrieb.
- Fig. 1
- a schematic front view of a first trench wall cutter according to the invention;
- Fig. 2
- an enlarged detail view of the trench wall cutter of
Fig. 1 in a milling operation; - Fig. 3
- a view of the trench wall cutter of
Fig. 2 in a rinse operation; - Fig. 4
- a schematic view of another trench cutter according to the invention in the milling operation;
- Fig. 5
- a view of the trench wall cutter of
Fig. 4 in a rinse operation; - Fig. 6
- a schematic view of a third trench cutter according to the invention in a rinsing operation;
- Fig. 7
- a schematic view of a fourth trench cutter according to the invention in the milling operation and
- Fig. 8
- a view of the trench wall cutter of
Fig. 7 in rinsing operation.
Die
Das Ansaugelement 24 ist über eine untere Abführleitung 26a mit einer am Rahmen angeordneten Abführpumpe 22 der Abführeinrichtung 20 verbunden. Die Abführpumpe 22 erzeugt den Ansaugdruck zum Ansaugen der Fräsflüssigkeit. Die angesaugte Fräsflüssigkeit wird über die Abführpumpe 22 dann weiter nach oben über eine obere Abführleitung 26c aus dem Frässchlitz entfernt. Die Fräsflüssigkeit kann über Tage in einer entsprechenden Anlage aufbereitet werden, insbesondere von abgefrästem Bodenmaterial entreichert werden. Die aufbereitete Fräsflüssigkeit kann dann wieder als Stützflüssigkeit in den Schlitz rückgeführt werden.The
Am oberen Ende des Fräsrahmens 20 ist eine Halteeinrichtung 18 angeordnet. Mit der Halteeinrichtung 18 kann die Schlitzwandfräse 10 an einem Seil oder einer Führungsstange eines nicht näher dargestellten Trägergerätes angebracht und insbesondere hierdurch vertikal verfahren werden. Die in
Im Fräsbetrieb kann insbesondere beim Abfräsen von bindigem Bodenmaterial dieses an den Fräszähnen 16 mit den plattenförmigen Halterungen an den Fräsrädern 10 anhaften. Hierdurch kann die Fräsleistung der Schlitzwandfräse 10 merklich herabgesetzt werden. Um einem Zusetzen der Fräsräder 14 durch anhaftendes Bodenmaterial entgegenzuwirken, ist gemäß der Erfindung bei der Schlitzwandfräse 10 eine Umschalteinrichtung 40 vorgesehen, mit welcher in dem dargestellten Ausführungsbeispiel die Schlitzwandfräse 10 von einem Fräsbetrieb in einen Spülbetrieb zum Freispülen der Fräsräder 14 umschaltbar ist.In milling operation, this can adhere to the cutting
Bei der in den
Weiterhin ist bei der Ausführungsform gemäß den
Im Fräsbetrieb gemäß
In den
Bei diesem zweiten Ausführungsbeispiel einer erfindungsgemäßen Schlitzwandfräse 10 bleibt die Förderrichtung der Abführpumpe 22 im Spülbetrieb, welcher in
Eine dritte Ausführungsform einer erfindungsgemäßen Schlitzwandfräse 10 ist in
Im Spülbetrieb gemäß
Eine vierte Ausführungsform einer erfindungsgemäßen Schlitzwandfräse 10 ist in den
Über das Verstellventil 52 der Umschalteinrichtung 40 ist die Zusatzleitung 28 mit einer Spülleitungsanordnung 60 mit Spülleitungen 62 verbindbar. Im Fräsbetrieb gemäß
Beim Umschalten auf einen Spülbetrieb gemäß
Gleichzeitig löst das Verstellen des Verstellventils 52 die Leitungsverbindung zwischen der mittleren Abführleitung 26b von der Abführpumpe 22 zu der Zusatzleitung 28. Zudem verbindet das Verstellventil 52 in der Stellung für den Spülbetrieb gemäß
Insbesondere mit der Schlitzwandfräse 10 nach der vierten Ausführungsform gemäß den
Claims (13)
dass eine Umschalteinrichtung (40) vorgesehen ist, welche zum Umschalten der Abführeinrichtung (20) in einen Spülbetrieb ausgebildet ist, in welchem ein von mindestens einer Abführpumpe (22) der Abführeinrichtung (20) erzeugter Flüssigkeitsstrom auf mindestens ein Fräsrad (14) zum Freispülen des Fräsrades (14) erzeugt ist.Trench wall cutter for creating a trench slot in the ground with
that a switching means (40) is provided which is formed in a flushing operation for switching the discharge device (20), in which an at least one discharge pump (22) of the discharge device (20) generated liquid stream on at least one cutting wheel (14) for flushing the Milling wheel (14) is generated.
dadurch gekennzeichnet,
dass mindestens eine Abführpumpe (22) als eine verstellbare Pumpe ausgebildet ist, welche von einem Fräsbetrieb, bei welchem die Abführpumpe (22) Fräsflüssigkeit von den Fräsrädern (14) absaugt, in den Spülbetrieb verstellbar ist, in welchem die Abführpumpe (22) in umgekehrter Richtung Flüssigkeit zu den Fräsrädern (14) fördert.Trench wall cutter according to claim 1,
characterized,
in that at least one discharge pump (22) is designed as an adjustable pump which can be adjusted into the rinsing operation by a milling operation, in which the discharge pump (22) extracts milling liquid from the cutting wheels (14), in which the discharge pump (22) is in reverse Direction fluid to the cutting wheels (14) promotes.
dadurch gekennzeichnet,
dass die Abführeinrichtung (20) eine Abführleitung (26) aufweist, welche sich von der mindestens einen Abführpumpe (22) nach oben erstreckt, und
dass die Umschalteinrichtung (40) ein Stellventil (42) an der Abführleitung (26) umfasst, wobei mit dem Stellventil (42) eine Ansaugöffnung (44) an der Abführleitung (26) geöffnet wird.Trench wall cutter according to claim 2,
characterized,
in that the discharge device (20) has a discharge line (26) which extends upwards from the at least one discharge pump (22), and
in that the switching device (40) comprises a control valve (42) on the discharge line (26), wherein an intake opening (44) on the discharge line (26) is opened with the control valve (42).
dadurch gekennzeichnet,
dass zwei Paare von Fräsrädern (14) vorgesehen sind,
dass ein Ansaugelement (24) der Abführeinrichtung (20) in einer Mitte zwischen den beiden Fräsrädern (14) angeordnet ist und
dass im Spülbetrieb aus dem Ansaugelement (24) Flüssigkeit in Richtung der Fräsräder strömt.Trench wall cutter according to one of claims 1 to 3,
characterized,
that two pairs of cutting wheels (14) are provided,
that a suction member (24) of the discharge device (20) in a middle between the two cutting wheels (14) is arranged and
that in the rinsing operation from the suction element (24) liquid flows in the direction of the cutting wheels.
dadurch gekennzeichnet,
dass eine Spülleitungsanordnung (60) mit mindestens einem Spülauslass (64) zum Freispülen des mindestens einen Fräsrades (14) vorgesehen ist.Trench wall cutter according to one of claims 1 to 4,
characterized,
that an irrigation tubing (60) with at least one flush outlet (64) for flushing the at least one cutting wheel (14) is provided.
dadurch gekennzeichnet,
dass die Umschalteinrichtung (40) ein Umschaltventil (48) umfasst, welches im Spülbetrieb eine Abführleitung (26) der Abführeinrichtung (20) mit der Spülleitungsanordnung (60) verbindet.Trench wall cutter according to claim 5,
characterized,
in that the switching device (40) comprises a switching valve (48) which, in the flushing operation, connects a discharge line (26) of the discharge device (20) to the flushing line arrangement (60).
dadurch gekennzeichnet,
dass mindestens eine zweite Pumpe (30) vorgesehen ist, welche in einem Spülbetrieb Flüssigkeit über die Spülleitungsanordnung (60) zu dem mindestens einen Fräsrad (14) fördert.Trench wall cutter according to claim 5 or 6,
characterized,
in that at least one second pump (30) is provided which, in a rinsing operation, delivers liquid via the rinsing line arrangement (60) to the at least one cutting wheel (14).
dadurch gekennzeichnet,
dass die zweite Pumpe (30) an der Abführleitung (26) angeschlossen ist und im Fräsbetrieb Fräsflüssigkeit nach oben abfördert und
dass in dem Spülbetrieb die zweite Pumpe (30) über ein Verstellventil (52) der Umschalteinrichtung (40) mit der Spülleitungsanordnung (60) verbunden ist.Trench wall cutter according to claim 7,
characterized,
in that the second pump (30) is connected to the discharge line (26) and in the milling operation delivers milling liquid upwards and
in that the flushing operation, the second pump (30) via an adjusting valve (52) of the switching means (40) to the irrigation tubing (60) is connected.
dadurch gekennzeichnet,
dass mehrere Spülauslässe (64) vorgesehen sind, welche fächerförmig im Bereich des mindestens einen Fräsrades (14) angeordnet sind.Trench wall cutter according to one of claims 5 to 8,
characterized,
in that a plurality of flushing outlets (64) are provided which are fan-shaped in the region of the at least one cutting wheel (14).
dadurch gekennzeichnet,
dass der mindestens eine Spülauslass (64) als eine verstellbare Düse ausgebildet ist.Trench wall cutter according to claim 5 or 9,
characterized,
the at least one flush outlet (64) is designed as an adjustable nozzle.
wobei in einem Fräsbetrieb die Fräsräder (14) drehend angetrieben werden und die Schlitzwandfräse (10) in den Boden abgeteuft und Bodenmaterial abgefräst werden,
wobei der Frässchlitz im Boden erstellt wird,
dadurch gekennzeichnet,
dass in einem Spülbetrieb die Schlitzwandfräse (10) angehoben wird und die Fräsräder (14) von einem Fräsgrund des Bodens beabstandet werden und
dass in der angehobenen Position der Fräsräder (14) ein Flüssigkeitsstrom in Richtung der Fräsräder (14) zum Freispülen erzeugt wird.Method for milling a milling slot in the ground, in particular with a slot wall cutter (10) according to one of claims 1 to 10,
wherein in a milling operation, the cutting wheels (14) are driven in rotation and the trench wall cutter (10) sunk into the ground and milled soil material,
where the mill slot is created in the ground,
characterized,
that in a rinsing operation, the trench wall cutter (10) is raised and the cutting wheels (14) are spaced from a milling ground of the ground and
that in the raised position of the cutting wheels (14), a liquid flow is generated in the direction of the cutting wheels (14) for purging.
dadurch gekennzeichnet,
dass an einem oberen Ende der Schlitzwandfräse (10) ein Seil oder eine Stange angebracht ist, mit welcher die Schlitzwandfräse (10) an einem Trägergerät aufgehängt und vertikal verstellt wird.Method according to claim 11,
characterized,
in that at an upper end of the trench wall cutter (10) is attached a rope or a rod with which the trench wall cutter (10) is suspended from a carrier device and vertically adjusted.
dadurch gekennzeichnet,
dass mittels einer Steuereinrichtung im Spülbetrieb ein Einspritzdruck und/oder eine Einspritzmenge der Flüssigkeit zum Freispülen der Fräsräder (14) eingestellt werden.Method according to claim 11 or 12,
characterized,
in that an injection pressure and / or an injection quantity of the liquid for purging the cutting wheels (14) are set by means of a control device in the rinsing operation.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18167973.9A EP3556942B1 (en) | 2018-04-18 | 2018-04-18 | Cutter for making a diaphragma wall and method of making such wall |
US16/383,708 US11286637B2 (en) | 2018-04-18 | 2019-04-15 | Trench cutter and method for producing a cut trench in the soil |
JP2019078628A JP6725722B2 (en) | 2018-04-18 | 2019-04-17 | Trench cutter and method for forming a drilling trench in soil |
CN201910312717.2A CN110387918B (en) | 2018-04-18 | 2019-04-18 | Trench cutter and method for producing a cut trench in soil |
KR1020190045178A KR102311859B1 (en) | 2018-04-18 | 2019-04-18 | Trench cutter and method for producing a cut trench in the soil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18167973.9A EP3556942B1 (en) | 2018-04-18 | 2018-04-18 | Cutter for making a diaphragma wall and method of making such wall |
Publications (2)
Publication Number | Publication Date |
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EP3556942A1 true EP3556942A1 (en) | 2019-10-23 |
EP3556942B1 EP3556942B1 (en) | 2020-04-29 |
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EP18167973.9A Active EP3556942B1 (en) | 2018-04-18 | 2018-04-18 | Cutter for making a diaphragma wall and method of making such wall |
Country Status (5)
Country | Link |
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US (1) | US11286637B2 (en) |
EP (1) | EP3556942B1 (en) |
JP (1) | JP6725722B2 (en) |
KR (1) | KR102311859B1 (en) |
CN (1) | CN110387918B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111441410A (en) * | 2020-04-17 | 2020-07-24 | 徐州徐工基础工程机械有限公司 | Auxiliary flushing device of double-wheel milling and stirring machine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112726708A (en) * | 2020-12-24 | 2021-04-30 | 河海大学 | Roller type cut-off wall grooving grouting equipment with side edge baffle and construction method |
EP4086390B1 (en) | 2021-05-06 | 2024-04-03 | BAUER Maschinen GmbH | Trench wall cutter and method for creating a milled slit in the ground |
EP4286593B1 (en) | 2022-05-30 | 2024-07-03 | BAUER Spezialtiefbau GmbH | Excavation device and method for creating a hole |
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- 2019-04-17 JP JP2019078628A patent/JP6725722B2/en active Active
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EP0249555A1 (en) * | 1986-06-11 | 1987-12-16 | SOLETANCHE Société Anonyme dite: | Motorpump for a fraising device for digging trenches in the ground |
EP0253726A1 (en) * | 1986-07-15 | 1988-01-20 | SOLETANCHE Société Anonyme dite: | Motoric device for digging trenches in the soil with the aid of rotary cutters |
DE4141629A1 (en) | 1991-12-17 | 1993-06-24 | Bauer Spezialtiefbau | Method of constructing subterraneous curtain wall - uses self-hardening circulating suspension, enriched with fine ground materials, to form homogeneous wall material |
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Also Published As
Publication number | Publication date |
---|---|
US20190323200A1 (en) | 2019-10-24 |
KR20190121706A (en) | 2019-10-28 |
JP6725722B2 (en) | 2020-07-22 |
CN110387918A (en) | 2019-10-29 |
US11286637B2 (en) | 2022-03-29 |
EP3556942B1 (en) | 2020-04-29 |
JP2019190268A (en) | 2019-10-31 |
KR102311859B1 (en) | 2021-10-12 |
CN110387918B (en) | 2022-03-11 |
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