Abrasion measuring apparatus for double disccutter of tbm

Abstract

An invention is disclosed regarding a double disc cutter wear measuring device for a TBM. The disclosed double disc cutter wear measuring device for a TBM comprises: a disc cutter mounting part mounted on a housing; a disc cutter part rotatably coupled to the disc cutter mounting part and having a pair of disc cutter rings; a bracket part connected to the housing; a sensor part mounted spaced apart from the bracket part and measuring the wear of the disc cutter rings; and a cover part connected to the housing and covering an opening of the housing.

Description

Technology Field

[0001] The present invention relates to a double disc cutter wear measuring device for a TBM, and more specifically, to a double disc cutter wear measuring device for a TBM that not only ensures safety but also accurately measures wear when measuring the wear of a disc cutter in a tunnel boring machine used in power tunnel construction. Background Technology

[0002] The excavation cross-section of the Tunnel Boring Machine (TBM) used for power tunnel construction ranges from 3.6m to 5.3m. In TBMs used for railway and road tunnels with cross-sections of 10m or more, there is sufficient space for an operator to replace and inspect the disc cutters, allowing for inspection and replacement under atmospheric pressure.

[0003] However, because TBMs (Tunnel Boring Machines) are frequently used in power tunnels due to spatial constraints and the absence of decompression devices, there is an inherent risk of soil, groundwater, or seawater inflow at any time. This is because the chamber lacks the counter-pressure to withstand external pressure during the process of operators inspecting and replacing disc cutters. Consequently, the working environment is extremely dangerous, necessitating technology capable of remotely measuring wear levels without human intervention.

[0004] Since there is currently no technology to determine the extent of wear or damage to the disc cutter, which is an excavation tool, all soil and slurry stabilizing fluid inside the chamber are emptied, and frequent visual inspections are performed by entering the chamber.

[0005] However, since workers must enter the chamber and perform frequent visual inspections, there is a problem that not only increases the frequency of workers' exposure to dangerous situations but also causes the construction period to be extended.

[0006] In addition, since all the soil and slurry stabilizing fluid inside the chamber are emptied, there is a problem that the imbalance between internal pressure and external pressure can cause ground subsidence.

[0007] Furthermore, if the disc cutters wear out and are not replaced at the appropriate time, the excavation efficiency of the excavator decreases, not only preventing tunneling but also posing a problem where the excavator may get stuck in rock if the outermost disc cutter wears out and fails to perform its function, making construction difficult. Therefore, there is a need to improve this.

[0008] The background technology of the present invention is disclosed in Korean Registered Patent Publication No. 10-1784181 (Registered September 27, 2017; Title of Invention: Device for Measuring Wear Rate of Disc Cutter for TBM and Method for Measuring Wear Rate of Disc Cutter Using the Same). The problem to be solved

[0009] The present invention was created out of the aforementioned necessity, and its purpose is to provide a double disc cutter wear measuring device for a TBM that not only ensures safety but also enables accurate measurement of wear when measuring the wear of a disc cutter in a tunnel boring machine used in power tunnel construction. means of solving the problem

[0010] To achieve the above-mentioned objective, the double disc cutter wear measuring device of the TBM according to the present invention comprises: a disc cutter mounting part mounted on a housing; a disc cutter part rotatably coupled to the disc cutter mounting part and having a pair of disc cutter rings; a bracket part connected to the housing; a sensor part mounted spaced apart from the bracket part and measuring the wear of the disc cutter rings; and a cover part connected to the housing and covering an opening of the housing.

[0011] It may further include a communication unit installed in the cover unit; and a wire unit connected to the sensor unit, supplying power to the sensor unit and transmitting wear information measured from the sensor unit to the communication unit.

[0012] The above-described disc cutter installation part may include: a pair of installation block parts disposed opposite to the housing, each having both sides of the disc cutter part rotatably coupled thereto; and a coupling part for coupling the installation block parts to the housing.

[0013] The above-mentioned connecting part can be connected to the installation block part at multiple points in the housing.

[0014] The above bracket portion may include a pair of bracket mounting portions in which the sensor portions are each installed; and a bracket main body portion connected to the housing, wherein the bracket mounting portions are installed spaced apart from each other and each bracket main body portion has a pair of through-hole portions through which the sensor portions pass.

[0015] The distance between the sensor parts is 60mm or more and 100mm or less, and the sensor parts may be positioned opposite to the disc cutter.

[0016] The above bracket body is in contact with the housing, and at least one of the plurality of coupling parts can connect the bracket body to the housing.

[0017] The above bracket main body may be provided with one or more coupling holes at both ends through which the coupling part is penetrated and coupled.

[0018] The above bracket body can be joined to the housing.

[0019] The above bracket body may have a joint that is welded along the edge of the housing.

[0020] The sensor unit may include: a coupling block unit coupled to the bracket installation unit; and a magnetic sensor unit connected to the coupling block unit, detecting magnetism to measure wear of the disc cutter, and coupled to the wire unit.

[0021] The magnetic sensor unit may include: a sensor housing connected to the coupling block unit; a magnetic sensor coupled inside the sensor housing and connected to the wire unit; and a magnet located inside the sensor housing and positioned opposite to the magnetic sensor.

[0022] The above magnets may be arranged in multiple numbers on the rear side of the magnetic sensor. Effects of the invention

[0023] The double disc cutter wear measuring device of the TBM according to the present invention has the effect of ensuring the safety of the operator by installing the sensor part spaced apart through a bracket part installed in the housing, thereby allowing easy measurement of the wear of the disc cutter part.

[0024] In addition, compared to conventional technology that measures the wear of a disc cutter part by visual inspection, the present invention measures the wear of the disc cutter part through a sensor part, thereby ensuring the accuracy of wear measurement of the disc cutter part and enabling more efficient inspection and replacement work. Brief explanation of the drawing

[0025] FIG. 1 is a drawing showing a double disc cutter wear measuring device of a TBM according to one embodiment of the present invention. FIG. 2 is a perspective view of a double disc cutter wear measuring device of a TBM according to one embodiment of the present invention. Figure 3 is a cross-sectional view of AA' of Figure 2. FIG. 4 is a perspective view of a double disc cutter wear measuring device of a TBM according to one embodiment of the present invention, viewed from a different direction. FIG. 5 is a drawing showing the separation of a cover portion from the housing of a double disc cutter wear measuring device of a TBM according to one embodiment of the present invention. Figure 6 is an enlarged view of the main part of Figure 5. Figure 7 is a cross-sectional view of the sensor part of Figure 6. Figure 8 is a cross-sectional view of BB' of Figure 4. Figure 9 is an enlarged view of the key part of Figure 8. Figure 10 is a cross-sectional view of CC' of Figure 4. Fig. 11 is an enlarged view of the main part of Fig. 10. FIG. 12 is a diagram showing the degree of magnetic field influence according to the spacing of the sensor part of a double disc cutter wear measuring device of a TBM according to one embodiment of the present invention. FIG. 13 is a graph showing the optimized distance state of the sensor section spacing of a double disc cutter wear measuring device of a TBM according to one embodiment of the present invention. FIG. 14 is a perspective view of a key part of a double disc cutter wear measuring device of a TBM according to another embodiment of the present invention. FIG. 15 is a perspective view of a double disc cutter wear measuring device of a TBM according to another embodiment of the present invention, viewed from a different direction. Specific details for implementing the invention

[0026] Hereinafter, an embodiment of a double disc cutter wear measuring device for a TBM according to the present invention will be described with reference to the contents described in the attached drawings. However, the present invention is not limited or restricted by exemplary embodiments.

[0027] In this process, the thickness of lines or the size of components depicted in the drawings may be exaggerated for convenience. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0028] Furthermore, in this specification, when a part is described as being “connected (or joined)” to another part, this includes not only cases where they are “directly connected (or joined)” but also cases where they are “indirectly connected (or joined)” with other members interposed between them. In this specification, when a part is described as “comprising (or having) a certain component,” this means that, unless specifically stated otherwise, it does not exclude other components but may additionally “comprising (or having)” other components.

[0029] The purpose and effects of the present invention may be naturally understood or become clearer through the following description, and the purpose and effects of the present invention are not limited solely to the description below. Furthermore, in describing the present invention, if it is determined that a description of known technology related to the present invention may unnecessarily obscure the essence of the invention, such detailed description will be omitted.

[0030] FIG. 1 is a drawing showing a double disc cutter wear measuring device for a TBM according to an embodiment of the present invention, FIG. 2 is a perspective view of a double disc cutter wear measuring device for a TBM according to an embodiment of the present invention, FIG. 3 is a cross-sectional view AA' of FIG. 2, FIG. 4 is a perspective view of a double disc cutter wear measuring device for a TBM according to an embodiment of the present invention viewed from a different direction, FIG. 5 is a drawing showing the separation of a cover portion from the housing of a double disc cutter wear measuring device for a TBM according to an embodiment of the present invention, FIG. 6 is an enlarged view of a key part of FIG. 5, FIG. 7 is a partial cross-sectional view of the sensor portion of FIG. 6, FIG. 8 is a cross-sectional view BB' of FIG. 4, FIG. 9 is an enlarged view of a key part of FIG. 8, FIG. 10 is a cross-sectional view CC' of FIG. 4, FIG. 11 is an enlarged view of a key part of FIG. 10, FIG. 12 is a drawing showing the degree of magnetic field influence according to the spacing of the sensor portion of a double disc cutter wear measuring device for a TBM according to an embodiment of the present invention, FIG. 13 is a graph showing the optimized distance state of the sensor section spacing of the double disc cutter wear measuring device of a TBM according to one embodiment of the present invention.

[0031] Referring to FIGS. 1 to 13, a double disc cutter wear measuring device (1) of a TBM according to one embodiment of the present invention includes a disc cutter installation part (100), a disc cutter part (200), a bracket part (300), a sensor part (400), and a cover part (500).

[0032] The disc cutter installation part (100) is mounted on the housing (10). At this time, the housing (10) is mounted on a tunnel boring machine (TBM) and can be formed in a tube shape.

[0033] The disc cutter installation section (100) may include a pair of installation block sections (110) and a coupling section (120). A pair of installation block sections (110) are arranged facing each other inside the housing (10), and each side of the disc cutter section (200) may be rotatably coupled. A rotation axis (212) of the disc cutter section (200) may be rotatably coupled to the installation block section (110).

[0034] The connecting part (120) connects the installation block part (110) to the housing (10). The connecting part (120) can connect the installation block part (110) to the housing (10) at multiple points.

[0035] The connecting portion (120) can be connected to the installation block portion (110) by passing through the connecting hole portion (11) of the housing (10) with a bolt. The connecting portion (120) may include a first connecting portion (121) and a second connecting portion (122). The first connecting portion (121) can be connected to the installation block portion (110) by bolting through each of the first connecting hole portions (11a) of the connecting hole portion (11) provided in the housing (10) in a plurality of numbers.

[0036] The second coupling part (122) can be bolted to the installation block part (110) by penetrating the second coupling hole part (11b) of the coupling hole part (11) provided in the housing (10).

[0037] The disc cutter section (200) is rotatably coupled to the disc cutter installation section (100) and is equipped with a pair of disc cutter rings (220). The disc cutter section (200) is rotated as a double disc cutter, and wear may continuously occur while crushing the rock.

[0038] The disc cutter section (200) may include a hub (210) and a pair of disc cutter rings (220). The hub (210) is rotatably coupled to the disc cutter mounting section (100), and the disc cutter rings (220) are connected spaced apart.

[0039] The hub (210) may include a hub body (211) and a pair of rotation shafts (212). A pair of disc cutters (220) are connected to the hub body (211) at spaced intervals.

[0040] A pair of rotating shafts (212) are connected to both sides of the hub body (211) and are each rotatably connected to the installation block (110) of the disc cutter installation part (100).

[0041] A pair of disc cutters (220) are spaced apart from the hub (210) and crush the rock while rotating in a disc shape, and wear occurs as the rock is crushed. The disc cutters (220) can be spaced apart from the hub body (211) of the hub (210). At this time, the sensor unit (400) is positioned opposite the disc cutters (220) and can measure the wear of the disc cutters (220).

[0042] The bracket portion (300) is connected to the housing (10). The bracket portion (300) can be bolted to cover a portion of the opening (12) of the housing (10).

[0043] The bracket section (300) may include a pair of bracket installation sections (310) and a bracket body section (320). A sensor section (400) is installed in each of the pair of bracket installation sections (310).

[0044] Specifically, the bracket mounting portion (310) may include an mounting plate portion (311) and a support portion (312). A sensor portion (400) may be coupled to the mounting plate portion (311). The mounting plate portion (311) may include a sensor coupling hole portion (311a) and an mounting hole portion (311b). A coupling block portion (410) of the sensor portion (400) may be bolted to the sensor coupling hole portion (311a). At this time, a coupling bolt (412) of the coupling block portion (410) may be bolted to the sensor coupling hole portion (311a). The mounting hole portion (311b) is located in the center of the mounting plate portion (311), and the magnetic sensor portion (420) of the sensor portion (400) passes through it.

[0045] The support member (312) is spaced apart from the bracket body (320) and supports the mounting plate (311). The support member (312) can be integrally coupled to the bracket body (320).

[0046] The bracket body (320) is connected to the housing (10), and the bracket installation part (310) is installed spaced apart, and is provided with a pair of through-hole parts (321) through which the sensor part (400) passes. The through-hole parts (321) are arranged opposite to the installation hole part (311b).

[0047] The bracket body (320) may come into contact with the housing (10). At this time, at least one of the plurality of coupling parts (120) may connect the bracket body (320) to the housing (10). The bracket body (320) may be provided with coupling holes (322) at both ends, namely the coupling ends (323), through which the coupling part (120) passes and is connected. The coupling holes (322) may each be connected to a plurality of coupling parts (120).

[0048] In this way, since the bracket part (300) can be connected to the housing (10) using the connecting part (120) of the disc cutter installation part (100), no additional connecting part is required, so the cost of parts can be reduced.

[0049] Furthermore, while the bracket body (320) is coupled to the coupling part (120) of the disc cutter installation part (100), the coupling end part (323) coupled by the coupling part (120) can be welded. As a result, a welded joint (W) can be formed on the coupling end part (323). Consequently, the bracket body (320) can be double-coupled to the housing (10) and more firmly connected.

[0050] The bracket body (320) may further include a tool passage groove (326) through which a tool (not shown) passes. The tool passage groove (326) is located above a bolt (not shown) that is coupled to the housing (10), and a tool for coupling and uncoupling the bolt can pass through it.

[0051] The sensor unit (400) is mounted spaced apart from the bracket unit (300) and measures the wear of the disc cutter (220). The sensor unit (400) is installed on the bracket mounting portion (310) of the bracket unit (300) and can be spaced apart from each other by a set distance.

[0052] The distance (L) between the sensor parts (400) is 60mm or more and 100mm or less, and the sensor parts (400) can be positioned opposite to the disc cutter (220).

[0053] When the distance (L) between the sensor parts (400) is 60 mm or more and 100 mm or less, the wear of the disc cutter (220) can be accurately measured without being affected by magnetic interference between the sensor parts (400).

[0054] If the distance (L) between the sensor parts (400) is less than 60 mm, the sensor parts (400) may mutually influence each other, making it impossible to accurately measure the wear of the disc cutter (220).

[0055] If the distance (L) between the sensor parts (400) exceeds 100mm, it is difficult to mount the sensor parts (400) on the bracket part (300), and the wear of the disc cutter (220) cannot be accurately measured.

[0056] Based on FIGS. 12 and 13, it can be seen that when the distance between the sensor units (400), i.e., the separation distance (L), is 60mm or more and 100mm, the sensor units (400) can accurately measure the wear of the disc cutter (220) without being affected by magnetic fields from each other. If the distance between the sensor units (400) is less than 60mm or the distance between the sensor units (400) is greater than 100mm, the sensor units (400) cannot accurately measure the wear of the disc cutter (220).

[0057] The sensor unit (400) may include a coupling block unit (410) and a magnetic sensor unit (420). The coupling block unit (410) is coupled to the bracket installation unit (310). The coupling block unit (410) may be bolted to the bracket installation unit (310).

[0058] The coupling block portion (410) may include a coupling block (411) and a coupling bolt (412). The coupling block (411) is plate-shaped and contacts the mounting plate portion (311) of the bracket mounting portion (310). The coupling block (411) is coupled so that a magnetic sensor portion (420) passes through the central portion. The coupling block (411) is provided with a coupling hole portion (411a) through which the coupling bolt (412) passes.

[0059] The connecting bolt (412) can be bolted to the sensor connecting hole (311a) of the mounting plate (311) by passing through the connecting hole (411a) of the connecting block (411).

[0060] The magnetic sensor unit (420) is connected to the coupling block unit (410), detects magnetism to measure the wear of the disc cutter (220), and is coupled to the wire unit (700). The magnetic sensor unit (420) can be integrally coupled to the central part of the coupling block unit (410).

[0061] The magnetic sensor unit (420) may include a sensor housing (421), a magnetic sensor (422), and a magnet (423). The sensor housing (421) may be connected to the coupling block unit (410). The sensor housing (421) may be integrally coupled to the central part of the coupling block (4111) of the coupling block unit (410). The sensor housing (421) has a tubular shape, and the wire unit (700) described later is inserted inside, and the magnetic sensor (422) and the magnet (432) may be coupled thereto.

[0062] The magnetic sensor (422) is coupled inside the sensor housing (421) and can be connected to the wire section (700). The magnetic sensor (422) is coupled inside the sensor housing (421) and can penetrate the central part of the magnet (423). The magnetic sensor (422) can be coupled to the wire coupling member (720) of the wire section (700).

[0063] The magnetic sensor (422) may have a magnet (423) positioned opposite the rear portion (422a). The front portion (422b) of the magnetic sensor (422) may be positioned opposite the disc cutter (220) of the disc cutter portion (200) and may be positioned closer to the disc cutter (220) than the rear portion (422a).

[0064] The magnetic sensor (422) can measure the Hall effect that changes as the distance (L) from the disc cutter (220) increases as the disc cutter (220) of the disc cutter part (200) wears out. At this time, the amount of wear on the disc cutter (220) can be calculated based on the Hall voltage applied to the sensor PCB (not shown) that changes due to the Hall effect.

[0065] Here, the Hall effect refers to the formation of a potential difference perpendicular to the direction of charge flow when a magnetic field is applied perpendicular to the direction of charge movement, and this potential difference can be called the Hall voltage.

[0066] The magnet (423) is located inside the sensor housing (421) and can be positioned opposite the magnetic sensor (422). Multiple magnets (423) can be placed on the rear portion (422a) of the magnetic sensor (422). The magnet (423) may be ring-shaped, and a part of the magnetic sensor (422) may be coupled to the center portion.

[0067] The magnet (423) is positioned on the rear portion (422a) of the magnetic sensor (422), and a Hall voltage can be applied to the sensor PCB of the magnetic sensor (422) due to the Hall effect that occurs as the disc cutter (220) wears down. As a result, the amount of wear on the disc cutter (220) of the disc cutter portion (200) can be calculated through the applied Hall voltage.

[0068] The cover portion (500) is connected to the housing (10) and covers the opening (12) of the housing (10). The cover portion (500) can be fitted into the housing (10), and a communication portion (600) described later can be installed on one side of the cover portion (500).

[0069] The double disc cutter wear measuring device (1) of the TBM may include a communication unit (600) and a wire unit (700). The communication unit (600) may be installed in the cover unit (500). The communication unit (600) may transmit wear information of the disc cutter unit (200) measured by the sensor unit (400). The communication unit (600) may transmit information measured by the magnetic sensor unit (420) of the sensor unit (400) to an externally installed PC or server.

[0070] The communication unit (600) can perform the role of transmitting information on the amount of wear of the disc cutter (220) of the disc cutter unit (200), measured by the magnetic sensor unit (420) of the sensor unit (400), to an external industrial PC or server through an Arduino board and a ZigBee communication module.

[0071] Information measured by the sensor unit (400) is transmitted to an external PC, etc. through the communication unit (600), and the wear information of the disc cutter (220) of the disc cutter unit (200) can be identified in real time from the outside to perform repairs and replacements.

[0072] The wire section (700) is connected to the sensor section (400), supplies power to the sensor section (400), and transmits wear information measured from the sensor section (400) to the communication section (600). The wire section (700) may be equipped with a plurality of wires (not shown), and one of the plurality of wires may supply power. Another of the plurality of wires may transmit wear information measured from the sensor section (400) to the communication section (600).

[0073] The wire section (700) is coupled with the magnetic sensor section (420) of the sensor section (400) and can supply power to the magnetic sensor section (420). As a result, the magnetic sensor section (420) receives power and operates to detect magnetism and measure the wear of the disc cutter (220).

[0074] The wire section (700) can transmit wear information to the communication section (600) by applying a Hall voltage to the sensor PCB (not shown) of the magnetic sensor (422) of the magnetic sensor section (420) and converting the amount of wear of the disc cutter (220) of the disc cutter section (200) through the applied Hall voltage.

[0075] FIG. 14 is a perspective view of a key part of a double disc cutter wear measuring device of a TBM according to another embodiment of the present invention, and FIG. 15 is a perspective view of a double disc cutter wear measuring device of a TBM according to another embodiment of the present invention viewed from a different direction.

[0076] Next, with reference to FIGS. 14 and FIGS. 15, a double disc cutter wear measuring device of a TBM according to another embodiment of the present invention will be described.

[0077] The double disc cutter wear measuring device of the TBM according to the present embodiment may be configured to differ only in the detailed configuration of the bracket body part (320).

[0078] Accordingly, in describing the double disc cutter wear measuring device of a TBM according to the present embodiment, only the detailed configuration of the bracket body part (320), which is different from the double disc cutter wear measuring device of a TBM described based on FIGS. 1 to 13, will be described.

[0079] For the remaining configuration of the bracket part (300) according to this embodiment, the description of the double disc cutter wear measuring device of the TBM according to one embodiment of the present invention, as described based on FIGS. 1 to 13, may be applied as is.

[0080] The bracket portion (300) is connected to the housing (10). The bracket portion (300) can be welded to cover a portion of the opening (12) of the housing (10).

[0081] The bracket section (300) may include a pair of bracket installation sections (310) and a bracket body section (320). A sensor section (400) is installed in each of the pair of bracket installation sections (310).

[0082] Specifically, the bracket mounting portion (310) may include an mounting plate portion (311) and a support portion (312). A sensor portion (400) may be coupled to the mounting plate portion (311). The mounting plate portion (311) may include a sensor coupling hole portion (311a) and an mounting hole portion (311b). A coupling block portion (410) of the sensor portion (400) may be bolted to the sensor coupling hole portion (311a). At this time, a coupling bolt (412) of the coupling block portion (410) may be bolted to the sensor coupling hole portion (311a). The mounting hole portion (311b) is located in the center of the mounting plate portion (311), and the magnetic sensor portion (420) of the sensor portion (400) passes through it.

[0083] The support member (312) is connected to the bracket body (320) at a distance and supports the mounting plate (311).

[0084] The bracket body (320) is connected to the housing (10), and the bracket installation part (310) is installed spaced apart, and may be provided with a pair of through-hole parts (321) through which the sensor part (400) passes. The through-hole parts (321) may be arranged opposite to the installation hole part (311b).

[0085] The bracket body (320) is joined to the housing (10). At this time, it is joined to cover a part of the opening (12) of the housing (10). The bracket body (320) has a joint (325) that is welded along the edge (13) of the housing (10).

[0086] The housing (10) may have a circular rim (13) in the shape of a tube. The bracket body (320) may have a rounded body rim (324) that contacts the rim (13) of the housing (10). At this time, a joint (325) may be formed on the body rim (324).

[0087] As a result, as the bracket portion (300) is welded along the edge (13) of the housing (10), the bonding area to the housing (10) is increased, allowing it to be more firmly bonded to the housing (10).

[0088] The bracket body (320) may further include a tool passage hole (327) through which a tool passes. The tool passage hole (327) is located above a bolt (not shown) coupled to the housing (10), and a tool for coupling and uncoupling the bolt can pass through.

[0089] As described above, in the double disc cutter wear measuring device (1, 2) of the TBM according to the present invention, the sensor part (400) is installed spaced apart through the bracket part (300) installed in the housing (10) so that the wear of the disc cutter part (200) can be easily measured, thereby ensuring the safety of the worker.

[0090] In addition, compared to the conventional technology of measuring the wear of the disc cutter part (200) by visual inspection, the present invention measures the wear of the disc cutter part (200) through the sensor part (400), thereby ensuring the accuracy of the wear measurement of the disc cutter part (200) and enabling more efficient inspection and replacement work.

[0091] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom.

[0092] Therefore, the true technical scope of protection of the present invention should be determined by the following claims. Explanation of the symbols

[0093] 1: TBM double disc cutter wear measuring device 10: Housing 11: Coupling hole portion 11a: First coupling hole portion 11b : Second coupling hole 12 : Opening 13 : Border 100 : Installation part 110 : Installation block part 120 : Connection part 121 : First connecting part 122 : Second connecting part 200 : Disc cutter section 210 : Hub 211: Hub body 212: Rotating shaft 220 : Disc cutter 300 : Bracket part 310: Bracket installation part 311: Installation plate part 311a: Sensor coupling hole 311b: Installation hole 312: Support part 320: Bracket main body part 321: Through hole section 322: Connecting hole section 323 : Connecting end 324 : Main body edge 325 : Joint 326 : Tool passage groove 327 : Tool passage hole section 400 : Sensor section 410 : Connecting block part 411 : Connecting block 411a: Connection hole 412: Connection bolt 420: Magnetic sensor part 421: Sensor housing 422: Magnetic sensor 422a: Rear section 422b : Front 423 : Magnet 500 : Cover section 600 : Communication section 700 : Wire section 710 : Wire 720 : Wire connecting member

Claims

Claim 1 A double disc cutter wear measuring device for a TBM, characterized by comprising: a disc cutter mounting part mounted on a housing; a disc cutter part rotatably coupled to the disc cutter mounting part and having a pair of disc cutter rings; a bracket part connected to the housing; a sensor part mounted spaced apart from the bracket part and measuring the wear of the disc cutter rings; and a cover part connected to the housing and covering an opening of the housing. Claim 2 A double disc cutter wear measuring device for a TBM according to claim 1, further comprising: a communication unit installed in the cover unit; and a wire unit connected to the sensor unit, supplying power to the sensor unit and transmitting wear information measured from the sensor unit to the communication unit. Claim 3 A double disc cutter wear measuring device for a TBM according to claim 2, wherein the disc cutter installation part comprises: a pair of installation block parts disposed opposite to the housing and each having both sides of the disc cutter part rotatably coupled thereto; and a coupling part for coupling the installation block part to the housing. Claim 4 A double disc cutter wear measuring device for a TBM, characterized in that, in claim 3, the coupling part is coupled to the installation block part at multiple points on the housing. Claim 5 A double disc cutter wear measuring device for a TBM according to claim 4, wherein the bracket part comprises: a pair of bracket mounting parts in which the sensor part is each installed; and a bracket main body part connected to the housing, wherein the bracket mounting part is installed spaced apart, and the sensor part is each passing through a pair of through-hole parts. Claim 6 A double disc cutter wear measuring device for a TBM according to claim 5, characterized in that the distance between the sensor parts is 60 mm or more and 100 mm or less, and the sensor parts are arranged facing the disc cutter. Claim 7 A double disc cutter wear measuring device for a TBM, characterized in that, in claim 5, the bracket body part contacts the housing, and at least one of the plurality of coupling parts connects the bracket body part to the housing. Claim 8 A double disc cutter wear measuring device for a TBM according to claim 7, characterized in that the bracket body part is provided with one or more coupling holes at both ends through which the coupling part is penetrated and coupled. Claim 9 A double disc cutter wear measuring device for a TBM, characterized in that, in claim 5, the bracket body is joined to the housing. Claim 10 A double disc cutter wear measuring device for a TBM, characterized in that, in claim 9, the bracket body part has a joint that is welded along the edge of the housing. Claim 11 A double disc cutter wear measuring device for a TBM according to claim 5, wherein the sensor part comprises: a coupling block part coupled to the bracket installation part; and a magnetic sensor part connected to the coupling block part, detecting magnetism to measure the wear of the disc cutter, and coupled to the wire part. Claim 12 A double disc cutter wear measuring device for a TBM according to claim 11, wherein the magnetic sensor part comprises: a sensor housing connected to the coupling block part; a magnetic sensor coupled inside the sensor housing and connected to the wire part; and a magnet located inside the sensor housing and positioned opposite to the magnetic sensor. Claim 13 A double disc cutter wear measuring device for a TBM, characterized in that, in claim 12, the magnets are arranged in plurality on the rear surface of the magnetic sensor.

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