Search

EP-4741577-A1 - SLOTTED WALL CUTTER WITH SUCTION BOX

EP4741577A1EP 4741577 A1EP4741577 A1EP 4741577A1EP-4741577-A1

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.

Inventors

  • LORÜNSER, Dominik
  • Zint, Manuel

Assignees

  • Liebherr-Werk Nenzing GmbH

Dates

Publication Date
20260513
Application Date
20250926

Claims (15)

  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. Slot wall cutter (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. Slot wall cutter (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. Slot 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) pointing towards the respective milling wheels (12), each with at least one support (30) and at least one reaming element (50).
  9. Slot 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 plate (13), wherein in particular the bearing plates (13) partially project into areas between each of two supports (30) spaced apart along the axes of rotation of the milling wheels (12).
  11. Slot 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 one of claims 1 to 12, which is further developed by the features of claim 10, comprising the steps: - Removal of at least one room element (50) from the holder (30), - Moving the holder (30) along the clearing 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 slot wall cutter (10) and removing the suction box (20) from the milling frame (11).
  15. Method for mounting the suction box of a diaphragm wall cutter (10) according to one of claims 1 to 12, which is 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 spacer element (50) to the holder (30), wherein the holder (30) is preferably held only by a positive fit with the at least one spacer element (50) to the base body (22).

Description

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. 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. Such diaphragm wall cutters typically have a suction box in the area between the cutter wheel pairs, primarily for the extraction of the excavated material. The suction box serves to remove soil material from the trench. For this purpose, a series of suction openings are provided on the suction box, through which liquid containing soil material is extracted by means of a waste pump. Its other functions include crushing the soil material loosened by the milling wheels. For this, suction boxes can have a series of clearing elements on the sides, which protrude into the spaces between the cutting tools arranged on the milling wheels and clear material there, potentially crushing it further. Since these usually plate-shaped clearing elements are wear parts, they are generally detachably attached to brackets on the suction box. 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. 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. 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. 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 equipped with a Carrier unit connectable. The suction box comprises a base body which has a bracket on a clearing side facing a milling wheel. The clearing side forms, in particular, a flat outer surface of the base body. 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. 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. 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. According to the invention, the bracket is not fixed, i.e., immovably arranged on the base body (for example, welded or screwed 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