CN218206695U

CN218206695U - Crushing unit for a tunnel boring machine and tunnel boring machine equipped with a crushing unit

Info

Publication number: CN218206695U
Application number: CN202221330911.7U
Authority: CN
Inventors: G.韦尔迈尔
Original assignee: Herrenknecht AG
Current assignee: Herrenknecht AG
Priority date: 2022-03-11
Filing date: 2022-05-30
Publication date: 2023-01-03
Anticipated expiration: 2032-05-30
Also published as: DE202022101341U1

Abstract

The invention relates to a crushing unit (112) for a tunnel boring machine (106), wherein a marking structure is formed on the screw (209, 212), which marking structure interacts with the sensor module (303, 306, 309, 312) in such a way that the movements of the crushing jaws (203, 206) towards and away from each other can be detected directly by the control module as a function of the rotational position of the respective screw (209, 212), and the reversal of direction can be controlled in particular in this case.

Description

Crushing unit for a tunnel boring machine and tunnel boring machine equipped with a crushing unit

Technical Field

The present invention relates to a crushing unit for a tunnel boring machine, which crushing unit has two pivotable crushing jaws, respectively, and also has a pivoting device equipped with a plurality of bolts, with which the crushing jaws can be articulated in order to be pivoted in directions towards one another and in further directions away from one another.

The utility model discloses still relate to a tunnel boring machine who is equipped with crushing unit.

Background

A crushing unit of this kind for a tunnel boring machine and a tunnel boring machine equipped with a crushing unit are known from the document CN 105909264A. Such previously known crushing units have two pivotable crushing jaws and have a pivoting device equipped with a number of bolts. The crushing jaw may be hinged to the pivoting means for pivoting.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the present invention is to provide a tunnel boring machine for the crushing unit of the tunnel boring machine and equipped with the crushing unit, which has significant features in the aspect of the quick and efficient movement of the crushing jaw under the condition of relatively high durability.

The object is achieved according to the invention by a crushing unit for a tunnel boring machine, each of which has two pivotable crushing jaws and also has a pivoting device equipped with a plurality of bolts, with which the crushing jaws can be articulated in order to be pivoted in a direction toward one another and in a further direction away from one another, wherein provision is made for a marking structure having at least one marking to be formed on at least one bolt which is connected in a rotationally fixed manner to the crushing jaws, for at least one sensor module which is fixed relative to the bolt formed with the marking structure to be provided, with the aid of which sensor module a position signal can be generated, which is dependent on the position of the marking structure relative to the sensor module, and for a control module to be provided, by means of which the movement of the crushing jaws can be controlled as a function of the position signal.

The technical problem is according to the utility model discloses still solve through a tunnel boring machine, tunnel boring machine is equipped with the crushing unit of aforementioned type.

In the crushing unit according to the invention, by the formation of the marking structure on at least one bolt, the movement of the crushing jaw can be influenced very specifically and very accurately by the directly received angular position, which marking structure interacts with the sensor module in such a way that the control module for moving the crushing jaw can be controlled by means of the position signal of the sensor module. Thereby, the crushing jaw not only works relatively fast, but also is subjected to relatively small loads, which is beneficial for durability.

According to a further preferred embodiment of the invention, the or each bolt configured with the marking structure connects the associated crushing jaw with the carrier.

According to a further preferred embodiment of the invention, the marking structure has at least two markings, wherein a first marking indicates an open position of the crushing jaw and a second marking indicates a closed position of the crushing jaw.

According to a further preferred embodiment of the invention, the marking structure has at least one recess as a marking, which is arranged in the bolt.

According to a further preferred embodiment of the invention, the sensor module has an inductive sensor which is arranged opposite the bolt designed with the marking structure, spaced apart from the bolt.

Drawings

Further suitable embodiments and advantages of the invention emerge from the following description of an exemplary embodiment with reference to the drawings.

In the drawings:

figure 1 shows schematically a front view of a cutting wheel of a tunnel boring machine equipped with a crushing unit,

figure 2 shows a front view of the exemplary crushing unit according to figure 2,

figure 3 shows a view according to figure 2 partly in section in the area of the bearing bolt,

figure 4 shows a cross-sectional view of the bearing bolt according to figure 3 in a first position,

FIG. 5 shows a cross-sectional view of the bearing bolt according to FIG. 3 in a second position, and

fig. 6 shows in a block diagram the interaction of the sensor module, the control module and the operating mechanism for the crushing jaws of the crushing unit.

Detailed Description

Fig. 1 shows an exemplary front view of the cutting wheel 103 of the tunnel boring machine 106, in the bottom region of which a crushing unit 112 is arranged behind a stripper drain 109 formed in the cutting wheel 103. As set forth in more detail below, the crushing unit 112 may be utilized to comminute mined material in the form of larger solids (e.g., rock pieces) that have been mined by the cutter wheels 103.

Figure 2 shows a front view of an embodiment of a crushing unit 112 for the tunnel boring machine 106. In the embodiment shown in fig. 2, the crushing unit 112 is equipped with two crushing

jaws

203, 206 which are pivotably mounted at the ends facing away from the bottom region of the tunnel boring machine 106 on a carrier 215 of the tunnel boring machine 106 by means of

bearing bolts

209, 212, respectively, as bolt sets, which are connected in a rotationally fixed manner to the respective crushing

jaw

203, 206, respectively.

The crushing

jaws

203, 206 have on their inwardly directed edge sides facing one another a crushing

tool

218, 221, respectively, which in this embodiment is constructed with a corrugated structure designed in a saw-toothed manner in order to crush the solids located between them by introducing a relatively high pressure over a relatively small area when the crushing

jaws

203, 206 are moved towards one another.

At the end pointing in the direction of the bottom region of the cutting wheel 103 of the tunnel boring machine 106, each crushing

jaw

203, 206 is connected by means of an articulated

bolt

230, 233 as a further bolt set via a

fixing flange

224, 227 to the end of an

actuating mechanism

236, 239, for example in the form of a hydraulic cylinder. The other end of each actuating

member

236, 239 is connected via a respective

retaining bolt

242, 245 as a further bolt group to a

support flange

248, 251 which is fixedly connected to the tunnel boring machine 106.

It can thus be seen from fig. 2 that, as the

actuating mechanisms

236, 239 are lengthened and shortened, the crushing

jaws

206, 209 can be pivoted relative to the carrier 215 with a pivoting movement towards each other and vice versa. These pivoting movements lead to a paired rotation of the crushing

jaws

203, 206 relative to the carrier 215, a paired rotation of the

fastening flanges

224, 227 relative to the actuating

members

236, 239 and a paired rotation of the actuating

members

236, 239 relative to the

abutment flanges

248, 251, which paired rotation is caused by the above-mentioned bolt pairs and, as explained in more detail below in the example using the

bearing bolts

209, 212, is converted into a position signal for the control module by at least one marking of the marking structure interacting with at least one sensor module.

Furthermore, it can be seen from the illustration according to fig. 2 that the tunnel boring machine 106 is configured with a mesh screen 254, which has a predetermined mesh size, on the rear side of the crushing

jaws

203, 206 in the mining direction. The mesh screen 254 serves to block solids having a size larger than the mesh size of the mesh screen 254 from entering the discharge port 257 at the rear side of the mesh screen 254 in the mining direction, while solids having a size smaller than the mesh size of the mesh screen 254 can pass through the mesh screen 254 and be carried away at the tunnel side by a reject discharge system connected to the discharge port 257.

Fig. 3 shows the crushing unit 112 according to fig. 2 in the region of the crushing

jaws

203, 206 with a partially cut-out region around the

bearing bolts

209, 212 in a view on the side lying on the rear side in the direction of the advance. As can be seen from the illustration according to fig. 3, the crushing unit 112 for each crushing

jaw

203, 206 is connected via a pair of

sensor modules

303, 306; 309. 312 are connected to the bracket 115.

Sensor modules

303, 306; 309. 312 extend into the region of the respective bearing

bolt

209, 212. Since the

bearing bolts

209, 212 are connected to the associated crushing

jaw

203, 206 in a rotationally fixed manner, the

bearing bolts

209, 212 are fixed relative to the associated

sensor module pair

303, 306; 309. 312 are rotated.

Fig. 4 shows a sectional view of a

sensor module pair

309, 312, which is arranged in the region of the bearing bolt 212 of the crushing jaw 206 shown on the left according to the illustration of fig. 3. As can be seen from fig. 4, the

sensor module pair

309, 312 and the further

sensor module pair

303, 306 are each equipped with an

inductive sensor

403, 406 as a measuring probe, which protrudes up to a relatively small distance from the outer side of the bearing bolt 212, but does not make contact with this outer side.

As can also be seen from the illustration according to fig. 4, the bearing bolt 212 and the further bearing bolt 209 have a first recess 409 and a second recess 412 which extend radially inward from the outside of the bearing bolt 212 and form, for example, a marking of a marking structure.

In fig. 4, when the crushing

jaws

203, 206 are in the shown open position and the

actuating mechanisms

236, 239 are retracted, the first recess 409 is arranged in the region of the inductive sensor 403 of the sensor module 309, while the further inductive sensor 406 of the further sensor module 312 is located in the region between the

recesses

409, 412. Thus, when the crushing

jaws

203, 206 are in the open position, a position signal is output from the inductive sensor 403 opposite the first recess 409 to a control module, not shown in fig. 4, which represents the open position of the crushing

jaws

203, 206.

Fig. 5 shows, in a sectional view corresponding to the illustration according to fig. 4, the bearing bolt 212 in a second end position, opposite to the rotational position according to fig. 4, which corresponds to a fully closed position of the crushing

jaws

203, 206. In the second end position, the second recess 412 is now opposite the further inductive sensor 406 of the further sensor module 312. With the bearing bolt 212 in this rotational position, the inductive sensor 406 opposite the second recess 412 feeds a control module, not shown in fig. 5, with a position signal, which represents the fully closed position of the crushing

jaws

203, 206.

It will be appreciated that in fig. 4 and 5, the

recesses

409, 412 used as indicia are shown only exemplarily as blind holes with relatively sharp edges. In other, not shown embodiments of the marking structure, the marking is designed as a recess which deepens gradually into the bottom region. In a further embodiment, which is not shown, the marking structure has a projection as at least one marking, which extends in an empty region formed in the bearing region of the respective screw and interacts with a sensor module arranged in the empty region.

Thus, it is concluded from the description of fig. 4 and 5 that the

recesses

409, 412 serving as a marking structure trigger position signals of the

inductive sensors

403, 406 as measuring probes of the

sensor modules

303, 306, 309, 312, which position signals represent the respective rotational position of the

bearing bolts

209, 212, in particular in the region of the reversal point when the movement of the crushing

jaws

203, 206 is reversed.

Fig. 6 shows in a block diagram the control module 603 already mentioned above, which can be formed on the one hand by the pair of

sensor modules

303, 306; 309. 312 is arranged to control the

steering mechanism

236, 239 such that a position signal directly representative of the rotational position of the

bearing bolt

209, 212 obtained by the interaction of the

sensor module

303, 306, 309, 312 with the marker structure triggers the

steering mechanism

236, 239 to effect reversal of movement in the respective other direction.

It is particularly important here to detect the reversal points of the crushing

jaws

203, 206 in order to control the respective movement reversal of the crushing

jaws

203, 206. The position of the marking in the form of the

recesses

409, 412 is here set, for example, in such a way that the marking is arranged immediately before reaching the maximum end position of the crushing

jaws

203, 206, in order to avoid the maximum end position being reached even with a certain delay in controlling the actuating means 236, 239 and in this case in particular to avoid the crushing

tools

218, 221 having the respective ineffective load peak coming into direct contact with one another.

Furthermore, the control module 603 is configured such that, for example, in the case of an angle position associated with a marking that cannot be determined within a specific time period characterizing the respective operating frequency of the crushing

jaws

203, 206, for example because of the presence of insufficiently comminuted mining material between the crushing

jaws

203, 206, the respective reversal of movement can be guided in a purely time-controlled manner without the respective end position actually being reached either. Thus, according to the present invention, the crushing unit 112 may be reliably operated at a relatively high operating frequency. In this case, the forces occurring in the entire kinematics are rarely present in the high-load range, which in turn is beneficial for the durability.

Claims

1. A crushing unit for a tunnel boring machine, which crushing unit has two pivotable crushing jaws each and also has a pivoting device equipped with a plurality of bolts, with which the crushing jaws can be articulated in order to be pivoted in a direction towards one another and in a further direction away from one another, characterized in that a marking structure having at least one marking is formed on at least one bolt connected in a rotationally fixed manner to the crushing jaws, at least one sensor module is provided which is fixed relative to the bolt formed with the marking structure and by means of which a position signal can be generated which is dependent on the position of the marking structure relative to the sensor module, and a control module (603) is provided by means of which the movement of the crushing jaws can be controlled as a function of the position signal.

2. A crushing unit according to claim 1, characterised in that the or each bolt configured with the indexing structure connects the associated crushing jaw with the bracket (115).

3. The crushing unit according to claim 1 or 2, characterized in that the marking structure has at least two markings, wherein a first marking (409) represents an open position of the crushing jaw and a second marking (412) represents a closed position of the crushing jaw.

4. The crushing unit of claim 1 or 2, characterized in that the marking structure has as a marking at least one recess, which is provided in the bolt.

5. The crushing unit of claim 1 or 2, characterized in that the sensor module has inductive sensors which are arranged opposite each other at a distance from the bolt configured with the marking structure.

6. A tunnel boring machine, characterised in that it is equipped with a crushing unit according to any one of claims 1 to 5.