Slotted wall cutter with suction box

Abstract

The invention relates to a trench cutter comprising at least one milling wheel for crushing soil material and a suction box arranged radially adjacent to the milling wheel, the suction box having a base body in which at least one, in particular plate-shaped, clearing element is detachably mounted on a clearing side facing the milling wheel. According to the invention, the support is slidably mounted on the base body along the clearing side. The invention further relates to a method for dismantling the suction box of a trench cutter according to the invention and a method for assembling the suction box of a trench cutter according to the invention.

Description

[0001] The present invention relates to a diaphragm wall cutter according to the preamble of claim 1, as well as a carrier device with such a diaphragm wall cutter and a method for mounting and dismounting the suction box of such a diaphragm wall cutter.

[0002] Diaphragm wall cutters are used to create trenches for the construction of diaphragm walls in a wide variety of construction projects and are available in various designs and sizes. Typically mounted on mobile carriers such as mobile cranes or cable excavators, they have multiple cutter wheels with cutting tools to remove soil material to create a trench. The cutter wheels are typically rotatably mounted on one or more bearing plates (gear plates), which may be located on the underside of a cutter frame. A common configuration includes two pairs of cutter wheels, with each pair mounted on its own bearing plate, one cutter wheel on each side of the plate.

[0003] Such trench cutters typically have a suction box located between the cutter wheel pairs. This box primarily serves to extract excavated material from the trench. For this purpose, the suction box has several suction openings through which a wastewater pump draws out any liquid containing soil material. Another function of the suction box is to crush the soil material loosened by the cutter wheels. To achieve this, the suction box may have a series of clearing elements on its sides. These elements protrude into the spaces between the cutting tools on the cutter wheels, removing material and potentially crushing it further. Since these typically plate-shaped clearing elements are wear parts, they are usually detachably attached to brackets on the suction box.

[0004] Previously, disassembling the suction box, for example for repair or replacement, required removing the milling wheels and often also the bearing shields, as the suction box, with its laterally protruding components, collided with the bearing shields when pulled out of the space between the milling wheels and the milling frame. This made the assembly and disassembly of the suction box complex and time-consuming.

[0005] The present invention therefore aims to advantageously further develop diaphragm wall milling machines of the type described and to overcome the aforementioned disadvantages. In particular, it should enable simple and quick assembly and disassembly of the suction box without having to remove the milling wheels and bearing shields.

[0006] According to the invention, this problem is solved by a slot wall milling machine with the features of claim 1 and by methods according to claims 14 and 15. Advantageous embodiments of the invention are described in the dependent claims and the following description.

[0007] According to the invention, a trench cutter is proposed which comprises at least one milling wheel for crushing soil material and a suction box arranged radially (relative to the milling wheel's axis of rotation) next to the milling wheel. The trench cutter preferably comprises a milling frame and is connectable to a carrier vehicle. The suction box comprises a base body which has a holder on a clearing side facing a milling wheel. The clearing side is, in particular, a flat outer surface of the base body.

[0008] The holder contains at least one clearing element for removing and / or crushing soil material in the space between cutting tools arranged on the outer circumference of the milling wheel. This clearing element, which is typically plate-shaped (clearing plate), can therefore be easily replaced, for example, when it has reached a certain wear limit. The clearing surface can have a substantially vertical orientation.

[0009] When multiple milling wheels are used, each milling wheel is preferably assigned such a holder with at least one reaming element. Therefore, when "the holder" is used in the singular below, unless otherwise specified, it always refers to the case where the diaphragm wall cutter comprises multiple milling wheels and, accordingly, multiple such holders.

[0010] Preferably, several cleaning elements are detachably mounted on the holder, for example, several cleaning plates arranged parallel to each other. The holder preferably includes a receptacle for each cleaning element (this can be designed as a receiving slot in the case of a cleaning plate) in which the respective cleaning element is received. The holder can be designed as a holding block for several cleaning elements.

[0011] According to the invention, the bracket is not fixed, i.e., immovably arranged on the base body (for example, welded or bolted on), but is slidably mounted on the base body along the reaming side. In particular, the bracket can be moved linearly in such a way that it can be removed from the base body or suction box with the milling wheel attached. For this purpose, the reaming element(s) must first be removed from the bracket. In the operating state of the diaphragm cutter, the bracket is preferably locked to the base body, whereby this lock can be easily released for removal of the bracket. Hereinafter, the term "bracket" will always refer to the slidably mounted bracket, unless otherwise specified.

[0012] Due to the movable mounting of the bracket for the at least one room element, it is possible to reduce the lateral dimensions of the suction box by removing or "pulling out" the bracket to such an extent that it can be removed with the milling wheel mounted.

[0013] Preferably, the suction box is arranged centrally between two milling wheels or two pairs of milling wheels. By removing the mounting bracket(s), the suction box can be pulled out of the space between the milling wheels, particularly parallel to the milling wheel axes of rotation, without collision. Preferably, the milling wheels are mounted on bearing shields, as described above, and each milling wheel has such a mounting bracket. In this case, the mounting brackets on each side can be removed, and then the entire base body or suction box can be pulled out of the space between the milling wheels without colliding with the bearing shields.

[0014] Due to the design of the suction box according to the invention, it can be removed (or installed) for maintenance purposes with minimal disassembly effort. The milling wheels (and, if applicable, bearing shields) do not need to be removed for this purpose. Furthermore, this design allows the bearing shields to be widened transversely to the milling wheel axis of rotation, enabling them to withstand higher loads.

[0015] The term "cutting tool" is not to be understood restrictively here and does not require actual cutting or the presence of a blade. Rather, it can refer to any element that can be used to break up or mill soil material, for example, a milling tooth with a conical tip.

[0016] In one possible embodiment, the bracket is mounted on the base body so that it can slide parallel to the axis of rotation of the milling wheel. This allows the bracket to be pulled out laterally or removed from the base body (when the slot cutter is hanging upright). In this position, the axis of rotation of the milling wheel is horizontal, so the bracket can also be moved horizontally.

[0017] In another possible embodiment, the base body has a linear guide on which the bracket is slidably mounted. The linear guide is designed so that the bracket can be completely pulled out of it and removed from the base body. In the simplest case, the linear guide can be formed by two webs connected to the base body (e.g., welded or bolted) or by a receiving part connected to the base body (e.g., welded or bolted) which has such webs or a correspondingly shaped recess. The webs or the recess form a receptacle into which the bracket can be inserted during assembly and pulled out during disassembly. For this purpose, the bracket can have a T-shaped retaining section that is received in the receptacle. The linear guide preferably has no moving parts, which gives it a robust design.

[0018] In another possible embodiment, the suction box includes a first connecting element by means of which the spacer element is detachably attached to the bracket. This prevents the bracket from unintentionally loosening or moving during operation. The first connecting element can be easily removed to dismantle the bracket.

[0019] Preferably, the first connecting element is designed as a bolt, which is mounted in bolt receptacles of the bracket and the reaming element. To prevent the bolt from unintentionally loosening during operation, it is releasably locked to the bracket or the base body, in particular by means of a locking device (e.g., a locking element inserted into a groove formed on the bolt and, for example, screwed to the bracket). The bolt preferably runs parallel to the direction of displacement of the bracket, i.e., parallel to the axis of rotation of the milling wheel.

[0020] In another possible embodiment, the support is a first support, and a second support is located on the base body, spaced apart from the first support in the direction of rotation of the milling wheel. In other words, in an upright, suspended slot wall cutter, the first and second supports are arranged one above the other on the base body. Preferably, the second support is located downstream of the first support (i.e., above the first support) in the direction of rotation of the milling wheel. When "the support" is mentioned below, it always refers to the movably mounted first support in relation to this embodiment.

[0021] Preferably, the at least one reaming element is detachably fastened in the second holder via a second connecting element. This allows the reaming element to be held by both holders simultaneously. In the case of multiple milling wheels, each milling wheel is specifically assigned such a pair of first and second holders.

[0022] In another possible embodiment, the second bracket is fixed to the base body. It can be welded or bolted to the base body, for example, and therefore cannot be removed from the base body by simply sliding it, as is the case with the first bracket. Since the second bracket is preferably located above the first, there is no risk of collision with the milling wheel or any bearing plate, so a removable fastening of the second bracket is not necessary for disassembling the suction box. Alternatively, the second bracket could be slidably mounted on the base body.

[0023] Preferably, the first bracket is held to the base body solely by a positive fit with the at least one airlock element. Thus, preferably no separate locking device is provided for the first bracket; instead, when the airlock element is installed, the connection between the first bracket and the airlock element, via the first connecting element, holds the first bracket to the base body, since the airlock element is additionally attached to the second bracket, which in turn is fixedly mounted to the base body. This results in a further simplified removal and installation process for the first bracket or the suction box.

[0024] In another possible embodiment, the base body has at least one suction opening on a suction side for extracting liquid containing soil material. This suction side is preferably located in front of (i.e., below, when the trench cutter is suspended upright) the mounting in the direction of rotation of the cutter wheel. Through this at least one suction opening, excavated material slurry located in the trench can be extracted and conveyed, for example, to a processing plant via a suction line. Preferably, the suction side is formed on a suction section of the base body with a substantially V-shaped cross-section. The suction side is preferably angled relative to the excavation side. This shape of the suction box allows for optimal placement in the space between several cutter wheels.

[0025] In another possible embodiment, the diaphragm cutter comprises two radially arranged and, in particular, counter-rotating milling wheels, with the suction box being arranged at least partially radially between the milling wheels. For this purpose, the suction box preferably has the previously described V-shaped extraction section. The base body comprises two reaming sides facing the respective milling wheels, each with at least one slidably mounted bracket and at least one reaming element.

[0026] In another possible embodiment, the slot wall cutter comprises two pairs of radially arranged milling wheels, wherein, in particular, each milling wheel of one milling wheel pair is arranged coaxially to a milling wheel of the other milling wheel pair. The suction box comprises a common base body for both milling wheel pairs, on which the reaming surfaces with the respective supports are formed, wherein the common base body is arranged at least partially radially between the milling wheels and, in the case of four milling wheels, has a total of four slidably mounted supports, each with at least one reaming element, assigned to the respective milling wheels.

[0027] In another possible embodiment, the diaphragm wall cutter comprises at least one bearing plate on which at least one milling wheel is rotatably mounted. A drive or gearbox (or part thereof) for driving the at least one milling wheel can be arranged within the bearing plate.

[0028] In the previously described embodiment with four milling wheels and the common base body, the axially spaced milling wheels can each be arranged on both sides of a bearing shield. The bearing shields partially project into areas between two brackets spaced apart along the milling wheel axes of rotation. In known devices, this would prevent removal of the suction box with the milling wheels and bearing shields mounted, as the lower brackets would collide with the bearing shields. Because these brackets can be removed beforehand in the solution according to the invention (by pulling them outwards, i.e., away from the bearing shields), the suction box, which is thus laterally reduced in size, can be easily removed or pulled out with the bearing shields and milling wheels mounted.

[0029] In another possible embodiment, the diaphragm cutter comprises a milling frame at the lower end of which at least one milling wheel and the suction box are arranged. The base body of the suction box is slidably mounted on the milling frame, and in particular, the base body can be moved in a direction parallel to the axis of rotation of the milling wheel.

[0030] In another possible embodiment, the slot wall milling machine comprises an adapter piece connected to the milling frame, with a linear guide on which the suction box is slidably mounted parallel to the axis of rotation of the milling wheel. The adapter piece, which can be designed as an adapter plate, is firmly connected to the milling frame, in particular by screws.

[0031] The base of the suction box is preferably detachably locked to the adapter piece and / or the milling frame by a locking mechanism, which in particular comprises at least one locking bolt. This prevents unintentional movement of the suction box during operation. The locking mechanism can, for example, comprise one, two (preferably), or more vertical locking bolts that must be pulled out of the linear guide of the adapter piece before the base can be removed. The locking bolts can be designed as hollow spring pins. The locking bolts can, in turn, be secured, for example, by ordinary cotter pins.

[0032] In the simplest case, the adapter piece can comprise two webs connected to the milling frame (e.g., welded or bolted) or an adapter base body connected to the milling frame (e.g., welded or bolted), which has such webs or a correspondingly shaped recess. The webs or the recess form a receptacle for the base body, into which the base body can be inserted during assembly of the suction box or pulled out during disassembly. For this purpose, the base body can have a T-shaped retaining section that is received in the receptacle. The linear guide preferably has no moving parts.

[0033] The invention further relates to a carrier vehicle with a diaphragm wall cutter according to the invention. The carrier vehicle can be, in particular, a cable excavator, but also a mobile crane or hydraulic excavator. The carrier vehicle preferably comprises a mobile undercarriage, for example with crawler tracks, and a superstructure rotatably mounted on the undercarriage about a vertical axis, with a swiveling boom. The diaphragm wall cutter is, in particular, suspended from the carrier vehicle by a cable, which is guided via one or more pulleys on the boom to a winch on the superstructure.

[0034] The invention further relates to a method for dismantling the suction box of a diaphragm wall cutter according to the invention. The method comprises the following steps: Removing the at least one reaming element from the holder (in particular by pulling a bolt serving as a first connecting element out of the holder and the reaming element), moving the holder along the reaming side (in particular parallel to the milling wheel axis of rotation) relative to the base body and removing the holder from the base body (in particular by pulling the holder out of a linear guide arranged on the base body), and moving the base body relative to the milling frame (in particular parallel to the milling wheel axis of rotation) and removing the suction box from the milling frame (in particular by pulling the base body out of a linear guide formed or arranged on the said adapter piece).

[0035] The procedure does not include, in particular, the disassembly of the at least one milling wheel, nor the disassembly of a bearing plate from the milling frame.

[0036] The invention further relates to a method for mounting the suction box of a diaphragm wall cutter according to the invention. The method comprises the following steps, which correspond in particular to the reverse sequence of the disassembly method described above: Inserting the base body of the suction box into a linear guide connected to the milling frame (which is formed or arranged in or on an adapter piece connected to the milling frame) and preferably locking the base body to the milling frame (in particular via one or more locking bolts), inserting the holder into a linear guide arranged on the base body, and attaching the at least one reaming element to the holder (in particular by inserting a bolt serving as a first connecting means into bolt receptacles in the holder and in the reaming element and optionally securing this bolt), wherein the holder is preferably held on the base body only by a positive fit with the at least one reaming element.

[0037] The described methods offer, in particular, the same properties, features and advantages as described in relation to the slot wall milling machine according to the invention, so that further descriptions are omitted to avoid repetition.

[0038] Further features, details and advantages of the invention will become apparent from the exemplary embodiments explained below with reference to the figures. The figures show: Figure 1: An embodiment of the slot wall milling machine according to the invention in a schematic frontal view; Figure 2: An embodiment of the suction box in a perspective view; Figure 3: The suction box mounted on the milling frame in a perspective view; Figure 4: The suction box mounted on the milling frame in a front view; Figure 5: An enlarged section of the slidably mounted bracket in a front view; Figure 6: An enlarged section of the linear guide of the slidably mounted bracket in a perspective view; and Figure 7: A perspective view of a further embodiment of the slot wall milling machine according to the invention.

[0039] In the Figure 1Figure 1 is a schematic front view of an embodiment of the slot wall cutter 10 according to the invention. The slot wall cutter 10 shown in this embodiment comprises a milling frame 11, which may, for example, include three frame parts that can be detachably connected to one another. Alternatively, the milling frame 11 may comprise more or fewer frame parts or be formed in one piece. The slot wall cutter 10 may be suspended from the top of the milling frame 11 on a support device (not shown here).

[0040] At the lower end of the milling frame 11 are several milling wheels 12, shown only schematically, for removing and crushing soil material. The milling wheels 12 shown are arranged radially next to each other. Another pair of milling wheels may be located on the rear side, which is not visible here as it is concealed. The milling wheels 12 are rotatably mounted, in particular, on bearing plates 13, which are attached to the underside of the milling frame 11 and may include rotary drives or gearboxes for driving the milling wheels 12 (gear plates).

[0041] A suction box 20 is located between the milling wheels 12, and in particular above a plane formed by the axes of rotation of the milling wheels 12. This suction box has an elongated shape and runs parallel to the axes of rotation of the milling wheels 12. In the case of two pairs of milling wheels, a common suction box 20 is preferably used for both pairs. In the embodiment shown here, a bearing plate 13 with two coaxially arranged milling wheels 12 is located on each side of the suction box 20.

[0042] The suction box 20 serves in particular to extract the overburden liquid suspension from the bottom slot by means of an overburden pump (not shown). The suction box 20 preferably has a box-shaped and / or symmetrical design and is mounted on the underside of the milling frame 11, in particular via an adapter piece described in more detail below.

[0043] An embodiment of the suction box 20 is shown in the Figure 2shown in a perspective view. Another perspective view of the suction box 20, viewed from a slightly oblique angle above, is shown in the Figure 3 and a front view in the Figure 4 depicted.

[0044] The suction box 20 comprises a base body 22, which in particular forms the basic steel structure of the suction box 20 connected to the milling frame 11. The suction box 20 of this embodiment is used in particular in a diaphragm wall milling machine 10 with four milling wheels 12 as a common suction box 20 and has four groups of clearing elements 50 that fit into the spaces between cutting tools 14 (see figure). Fig. 7 ), which are arranged on the outer circumferential surfaces of the milling wheels 12, protrude and remove soil material there. In the exemplary embodiment of the Figure 2 Three reaming elements 50 are provided per milling wheel 12, although fewer or more reaming elements 50 are also possible.

[0045] In the Figure 2-5The reaming elements 50 are shown schematically only as laterally shortened plates. In practice, the reaming elements 50 are preferably extended laterally and preferably also downwards in order to project into the spaces between the cutting tools 14. The reaming elements 50 are particularly designed as reaming plates.

[0046] Since the reaming elements 50 are wear parts, they must be easily replaceable. For this purpose, the reaming elements 50 are detachably mounted on the base body 22. The latter has reaming sides 21 which, when the diaphragm cutter 10 is in an upright position (see figure 10), Fig. 1 In the present case, terms such as "below" or "vertical" refer to an upright or vertical orientation of the milling frame 11), preferably forming vertical planes. Several brackets 30, 32 are located on the reaming sides 21, to which the reaming elements 50 are detachably mounted.

[0047] For each milling wheel 12 or for each group of reaming elements 50, the suction box 20 has a first support 30 that is detachably or movably mounted on the reaming side 21 and a second support 32 that is fixedly connected to the base body 22. A description of one such group of supports 30, 32 and reaming elements 50 follows, which also applies to the other groups.

[0048] The movable first support 30 is slidably mounted on the reaming side 21 via a linear guide 24, the linear guide 24 being designed in particular such that the first support 30 can be displaced in a direction parallel to the axis of rotation of the associated milling wheel 12. The second support 32 is preferably arranged above (i.e., in the direction of rotation of the milling wheel 12 towards) the first support 30 and is firmly connected to the base body 22, in particular by screws.

[0049] An enlarged section of an embodiment of the linear guide 24 is shown in the Figure 6 The illustration shows a front view of the linear guide 24 and the first bracket 30 held therein. Figure 5 The linear guide 24 is formed by a receiving part 23, which is firmly connected to the base body 22, for example by screws. The receiving part 23 has lateral webs that form a receptacle. The first support 30 has a T-shaped retaining section 36 (see figure). Fig. 5 ), which is accommodated in the aforementioned receptacle of the receiving part 23. This results in a single translational degree of freedom of the first support 30 along the milling wheel rotation axis. The linear guide 24 can have a mechanical stop which prevents displacement of the support 30 from the operating position (see Figure 2). Fig. 2 ) only in one direction (especially away from storage sign 13) is permitted.

[0050] As in the Figure 2As can be seen, in the illustrated embodiment, the broaching elements 50 are fastened in the first holder 30 by a first connecting element 34 in the form of a bolt and in the second holder 32 by a second connecting element 35, also in the form of a bolt. The bolts 34, 35 extend, in particular, parallel to the axis of rotation of the milling wheel. The holders 30, 32 have receptacles for the broaching elements 50, in particular slot-shaped receptacles for plate-shaped broaching elements 50, and form receiving blocks for these. The holders 30, 32 and the broaching elements 50 have corresponding bolt receptacles through which the bolts 34, 35 pass.

[0051] As in the Figure 5As can be seen, the bolts 34, 35 can each be secured to the respective bracket 30, 32 by a locking device 36, for example by a locking bolt that is inserted into a groove at the end of the respective bolt 34, 35 and screwed to the respective bracket 30, 32 by means of screws 38. This prevents the bolts 34, 35 from unintentionally coming loose.

[0052] Preferably, the first holder 30 is not locked to the base body 22 by its own locking mechanism in the operating state, but rather the first holder 30 is held in position by the positive locking between the reaming elements 50, which are held in the second holder 32 which is fixedly arranged on the base body 22, and the first holder 30. As in Fig. 6 As can be seen, the receiving part 23 can also have receiving parts for the clearing elements 50.

[0053] This design of the linear guide 24 and the first bracket 30 makes it quick and easy to remove the first brackets 30 with the milling wheels 12 and bearing shields 13 mounted. To do this, first the bolts 34, 35 are pulled out and the broaching elements 50 are removed. Then the first brackets 30 can be pulled out of the mounting parts 23, with the brackets 30 being pushed away from the center or the bearing shields 13. As can be seen from the Figure 1 This results in the lateral dimension of the suction box 20 in the area of ​​the milling wheels 12 and the bearing shields 13 being reduced to such an extent that the entire suction box, i.e. the base body 22 together with the second supports 32, can now be pulled out of the space between the milling wheels 12 and the milling frame 11 in a direction parallel to the milling wheel rotation axes.

[0054] To enable this, the base body 22 is preferably slidably mounted on the milling frame 11 via an adapter piece 16. The adapter piece 16, which is located in the Figure 2-4 As can be seen, it has a linear guide 17 in which a preferably T-shaped retaining section 26 of the base body 22 is slidably mounted. The adapter piece 16 can be attached to the milling frame 11 by means of several screws 19.

[0055] To lock the base body 22 to the adapter piece 16 during operation and prevent unintentional movement, locking bolts 18 can be provided, which are inserted, in particular vertically, through corresponding bolt receptacles in the adapter piece 16, in the base body 22, and preferably in the milling frame 11. The locking bolts 18 can, in turn, be secured, for example, by cotter pins. The base body 22 can have a recess 29 extending through the base body 22 in the displacement direction of the linear guide 17, which provides access to the locking bolts 18. To dismantle the suction box 20, after removing the first brackets 30, the locking bolts 18 are pulled out and the base body 22 is pushed out of the linear guide 17. This makes it possible to dismantle the suction box 20 while the milling wheels 12 and the bearing shields 13 are installed.

[0056] The suction box 20 can have a lower suction section 40 (see below). Fig. 2 ), which, viewed along the longitudinal axis of the milling wheel, can have a V-shaped profile, the chamfered surfaces of which, facing the milling wheels 12, each form a suction side 41. The base body 22 can have a plurality of suction openings 42 on each suction side 41, which are connected via an internal volume or suction chamber of the base body 22 to a waste conveying pump, preferably arranged in the milling frame 11, which pumps the pumped suspension through a suction line (not shown), in particular running within the milling frame 11, e.g. to a processing plant.

[0057] The Figure 6Figure 1 shows a further embodiment of the slot wall milling machine 10 according to the invention in a perspective view, showing several cutting tools 14 arranged on the outer circumferential surfaces of the milling wheels 12. These cutting tools 14 can also be referred to as shredding tools and are preferably designed as flat milling teeth, which may comprise a base body and a blade attached thereto. Alternatively, the cutting tools 14 may, for example, be designed as milling teeth with conical tips. In addition to fixed or immobile cutting tools 14, the milling wheels 12 may also include hinged cutting tools. Reference symbol list:

[0058] 10 Slotting cutter 11 Cutter frame 12 Cutter wheel 13 Bearing plate 14 Cutting tool 16 Adapter 17 Linear guide 18 Locking bolt 19 Screw 20 Suction box 21 Roughing side 22 Base body 23 Mounting part 24 Linear guide 26 Holding section 28 Mounting 29 Recess 30 Bracket (first bracket) 32 Second bracket 34 First fastener 35 Second fastener 36 Holding section 37 Locking device 38 Screw 40 Extraction section 41 Extraction side 42 Extraction opening 50 Roughing element

Claims

1. Diaphragm wall cutter (10) comprising at least one milling wheel (12) for crushing soil material and a suction box (20) arranged radially next to the milling wheel (12) with a base body (22) which has a holder (30) on a clearing side (21) facing a milling wheel (20) in which at least one clearing element (50), in particular a plate-shaped clearing element, is detachably attached, characterized by that the holder (30) is slidably mounted on the base body (22) along the clearance side (21).

2. Slot wall milling machine (10) according to claim 1, wherein the holder (30) is slidably mounted on the base body (22) parallel to the axis of rotation of the milling wheel (12).

3. Slot wall milling machine (10) according to claim 1 or 2, wherein the base body (22) has a linear guide (24) on which the holder (30) is slidably mounted, wherein the linear guide (24) is designed such that the holder (30) can be completely pulled out of it and removed from the base body (22).

4. Slit wall milling machine (10) according to one of the preceding claims, wherein the suction box (20) comprises a first connecting means (34) by means of which the reaming element (50) is detachably fastened to the support (30), wherein the first connecting means (34) is preferably designed as a bolt which is mounted in bolt receptacles of the support (30) and the reaming element (50) and is detachably locked to the support (30) in particular by means of a locking device (37).

5. Slit wall milling machine (10) according to the preceding claim, wherein the holder (30) is a first holder (30) and a second holder (32) is arranged on the base body (22), which is spaced apart from the first holder (30) in the direction of rotation of the milling wheel (12) and is arranged in particular after the first holder (30), wherein the reaming element (50) is preferably detachably fastened in the second holder (32) via a second connecting means (35).

6. Slot wall cutter (10) according to the preceding claim, wherein the second holder (32) is arranged immovably on the base body (22), wherein the first holder (30) is preferably held on the base body (22) only by means of a positive fit with the spacer element (50).

7. Diaphragm wall cutter (10) according to one of the preceding claims, wherein the base body (22) has at least one suction opening (42) on a suction side (41) for suctioning liquid containing soil material, wherein the suction side (41) is preferably arranged in the direction of rotation of the milling wheel (12) in front of the holder (30), wherein the suction side (41) is in particular formed on a suction section (40) of the base body (22) with a substantially V-shaped cross-section.

8. Diaphragm wall cutter (10) according to one of the preceding claims, comprising two radially arranged and in particular counter-rotating milling wheels (12), wherein the suction box (20) is arranged at least partially radially between the milling wheels (12), wherein the base body (22) comprises two reaming sides (21) facing the respective milling wheels (12), each with at least one holder (30) and at least one reaming element (50).

9. Slit wall milling machine (10) according to one of the preceding claims, comprising two pairs of radially arranged milling wheels (12), wherein in particular each milling wheel (12) of a milling wheel pair is arranged coaxially to a milling wheel (12) of the other milling wheel pair, wherein the suction box (20) for both milling wheel pairs comprises a common base body (22) which is arranged at least partially radially between the milling wheels (12) and has four holders (30) assigned to the respective milling wheels (12), each with at least one reaming element (50).

10. Diaphragm wall milling machine (10) according to the preceding claim, wherein the axially spaced milling wheels (12) are arranged on both sides of a bearing shield (13), wherein in particular the bearing shields (13) partially project into areas between each of two supports (30) spaced apart from each other along the axes of rotation of the milling wheels (12).

11. Slit wall milling machine (10) according to one of the preceding claims, comprising a milling frame (11) at the lower end of which the at least one milling wheel (12) and the suction box (20) are arranged, wherein the base body (22) of the suction box (20) is slidably mounted on the milling frame (11).

12. Slot wall milling machine (10) according to the preceding claim, comprising an adapter piece (16) connected to the milling frame (11) with a linear guide (17) on which the suction box (20) is slidably mounted parallel to the axis of rotation of the milling wheel (12), wherein the base body (22) of the suction box (20) is preferably detachably locked to the adapter piece (16) and / or to the milling frame (11) via a locking mechanism, which in particular comprises at least one locking bolt (18).

13. Carrier device, in particular cable excavator, with a diaphragm wall cutter (10) according to one of the preceding claims.

14. Method for dismantling the suction box (20) of a diaphragm wall cutter (10) according to any one of claims 1 to 12, further developed by the features of claim 10, comprising the steps: - removing the at least one reaming element (50) from the holder (30), - moving the holder (30) along the reaming side (21) relative to the base body (22) and removing the holder (30) from the base body (22), and - moving the base body (20) relative to a milling frame (11) of the diaphragm wall cutter (10) and removing the suction box (20) from the milling frame (11).

15. Method for mounting the suction box of a slot wall milling machine (10) according to one of claims 1 to 12, further developed by the features of claim 10, comprising the steps: - inserting the base body (22) of the suction box (20) into a linear guide (17) connected to a milling frame (11) of the slot wall milling machine (10) and preferably locking the base body (22) to the milling frame (11), - inserting the holder (30) into a linear guide (24) arranged on the base body (22), and - attaching the at least one reaming element (50) to the holder (30), wherein the holder (30) is preferably held only by a positive fit with the at least one reaming element (50) on the base body (22).

Images