Cutterhead assembly and slurry shield machine

Abstract

The present disclosure relates to a cutterhead assembly and a slurry shield tunneling machine. The cutterhead assembly comprises a cutterhead (10), an electrode mounting seat (20) arranged on the cutterhead (10) and having a first through hole (21) penetrating through the thickness direction of the cutterhead (10), an emitting electrode (30) having a first electrode portion (31) and a second electrode portion (32), the first electrode portion (31) penetrating through the first through hole (21), the second electrode portion (32) being fixedly connected to the electrode mounting seat (20) through a first connecting piece (41), and a first sealing and insulating assembly (50) being compressed between the emitting electrode (30) and the electrode mounting seat (20) and between the emitting electrode (30) and the first connecting piece (41) to insulate and seal the emitting electrode (30) from the electrode mounting seat (20) and the first connecting piece (41).

Description

Technical Field

[0001] This disclosure relates to the field of tunnel boring, and more particularly to a cutterhead assembly and a slurry shield tunneling machine. Background Technology

[0002] As tunnel boring machine (TBM) construction moves towards larger diameters, longer distances, and higher water pressure, the frequency with which TBMs encounter adverse geological conditions such as fractured zones, karst caves, and underground rivers increases, leading to greater construction risks. To mitigate these risks, it is crucial to accurately detect the geological conditions a certain distance ahead of the TBM's working face and perform three-dimensional inversion.

[0003] In recent years, to meet the demand for precise geological prediction, three-dimensional geological prediction methods have gradually increased both domestically and internationally. Internationally, methods such as TSP (Tunnel Seismic Prediction) and TRT (True Reflection Tomography) are used. These methods primarily rely on seismic sources, resulting in insufficient detail in the geological conditions ahead of the tunnel face after imaging. Domestically, methods such as three-dimensional induced polarization (IP) and three-dimensional focused electrical resistivity tomography (SIP) are used. All of these methods require the placement of suitable transmitting electrodes on a large-diameter cutterhead. Some related technologies involve setting up drivable electrodes that extend into the strata on the cutterhead, necessitating the shutdown of the tunnel boring machine (TBM) during the detection process. Therefore, real-time detection is not possible, and the electrodes lack waterproofing capabilities, limiting their application to TBM cutterheads. Summary of the Invention

[0004] In view of this, the present disclosure provides a cutterhead assembly and a slurry shield machine that can meet the sealing requirements for the installation of the emitting electrode on the cutterhead.

[0005] In one aspect of this disclosure, a cutter head assembly is provided, comprising:

[0006] Cutterhead;

[0007] An electrode mounting base is disposed on the cutter head and has a first through hole extending along the thickness direction of the cutter head;

[0008] The emitting electrode has a first electrode portion and a second electrode portion, the first electrode portion passing through a first through hole, and the second electrode portion being fixedly connected to the electrode mounting base by a first connector; and

[0009] A first sealing and insulating assembly is pressed between the emitting electrode and the electrode mounting base and between the emitting electrode and the first connector, so that the emitting electrode is insulated and sealed from both the electrode mounting base and the first connector.

[0010] In some embodiments, the cutter head has an opening, and the electrode mounting base is fixedly disposed in the opening and electrically connected to the cutter head to form a shielding electrode together with the cutter head.

[0011] In some embodiments, the electrode mounting base has a recessed portion that is recessed relative to the front surface of the cutter head, the first through hole is located at the bottom of the recessed portion, the second electrode portion is located in the recessed portion, and is fixedly connected to the bottom of the recessed portion by the first connector.

[0012] In some embodiments, the electrode mount further has a protruding edge located around the recess and protruding relative to the front surface of the cutter head.

[0013] In some embodiments, the first connector includes a fixing bolt, and the first sealing and insulating assembly includes:

[0014] An electrode insulating pad is located between the electrode mounting base and the second electrode portion;

[0015] A bolt insulating washer is located between the fixing bolt and the emitting electrode; and

[0016] An electrode insulating sleeve is located between the first through hole and the first electrode portion.

[0017] In some embodiments, the first electrode portion extends relative to the rear surface of the cutter head and is fixedly connected to the electrode mounting base by a second connector; the cutter head assembly further includes:

[0018] A second sealing and insulating component is pressed between the second connector and the electrode mounting base to insulate and seal the second connector from the electrode mounting base.

[0019] In some embodiments, the second connector includes an electrode retaining ring fitted around the outer periphery of the first electrode portion, and the second sealing and insulating assembly includes:

[0020] An insulating gasket is located between the electrode retaining ring and the electrode mounting base.

[0021] In some embodiments, the first electrode portion further has an extended portion extending relative to the rear surface of the cutter disc; the cutter disc assembly further includes:

[0022] A protective base is disposed on the side of the electrode mounting base away from the second electrode portion and is electrically connected to the electrode mounting base; and

[0023] A third sealing and insulating component is pressed between the protective seat and the first electrode portion to insulate and seal the first electrode portion from the protective seat.

[0024] In some embodiments, the protective base includes a base body having a first inner cavity adjacent to a surface of the electrode mounting base on the side away from the second electrode portion, the first electrode portion being fixedly connected to the electrode mounting base by a second connector.

[0025] In some embodiments, the cutter head assembly further includes a second sealing and insulating assembly pressed between the second connector and the electrode mount, both of which are located within the first inner cavity.

[0026] In some embodiments, the base body further has a second inner cavity spaced apart from the first inner cavity, the second inner cavity communicating with the first inner cavity through a second through hole, the second inner cavity being located on the side of the first inner cavity away from the electrode mounting base; the protruding portion passes through the first inner cavity and is disposed in the second through hole, the third sealing and insulating assembly being located between the protruding portion and the second through hole; the cutter head assembly further includes: an edge calculation module located in the second inner cavity.

[0027] In some embodiments, the edge computing module includes an edge computing element and an insulating protective layer covering the edge computing element. The edge computing element is electrically connected to the first electrode portion via a transmitting electrode cable and to the protective base via a shielding electrode cable.

[0028] In some embodiments, the protective base further includes an end cap that is detachably connected to the cavity wall of the second inner cavity and secures the edge computing module by abutting against it.

[0029] In some embodiments, the protective base further includes a sealing socket disposed on the base body and located outside the second inner cavity, the sealing socket being electrically connected to the edge computing element; the cutter head assembly further includes:

[0030] An aviation plug, threaded to the sealed socket, and having a lead-out cable.

[0031] In some embodiments, the cutter head is an atmospheric pressure cutter head.

[0032] In one aspect of this disclosure, a slurry shield tunneling machine is provided, comprising: the aforementioned cutterhead assembly.

[0033] Therefore, according to the embodiments of this disclosure, an electrode mounting base with a first through hole is provided on the cutter head, so that the first electrode portion of the emitting electrode passes through the first through hole, and the second electrode portion of the emitting electrode is fixedly connected to the electrode mounting base through a first connector. This allows the emitting electrode to be more reliably fixed to the cutter head and facilitates the wiring of the emitting electrode. By pressing the first sealing and insulating assembly between the emitting electrode and the electrode mounting base and between the emitting electrode and the first connector, the installation seal between the emitting electrode, the first connector, and the electrode mounting base can be achieved, and effective insulation between the emitting electrode and the electrode mounting base and the first connector can be achieved. Attached Figure Description

[0034] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0035] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0036] Figure 1 This is a cross-sectional schematic diagram of a partial structure of a cutter head assembly according to some embodiments of the present disclosure;

[0037] Figure 2 This is a cross-sectional schematic diagram of the structure of the emitting electrode according to an embodiment of the cutter head assembly of this disclosure;

[0038] Figure 3 This is a cross-sectional schematic diagram of the structure of the electrode mounting base according to an embodiment of the cutter head assembly of this disclosure;

[0039] Figure 4 This is a cross-sectional schematic diagram of the mounting structure of the protective seat, edge computing module and aviation plug according to an embodiment of the cutter head assembly of this disclosure.

[0040] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0041] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0042] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0043] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0044] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0046] In some related technologies, electrodes that can be driven to extend into the strata are set on the cutterhead. Therefore, the tunnel boring machine needs to be stopped during the detection process, so it cannot be detected in real time. Moreover, the electrodes lack waterproof capability and are only suitable for TBM cutterheads, not for atmospheric pressure cutterheads of slurry tunnel boring machines.

[0047] In view of this, the present disclosure provides a cutterhead assembly and a slurry shield machine that can meet the sealing requirements for the installation of the launching electrode on the cutterhead.

[0048] Figure 1 This is a schematic cross-sectional view of a partial structure of a cutterhead assembly according to some embodiments of the present disclosure. (See reference) Figure 1 This disclosure provides a cutterhead assembly, including a cutterhead 10, an electrode mounting base 20, an emitting electrode 30, and a first sealing and insulating assembly 50. The cutterhead 10 may include a cutterhead body and a plurality of cutters (not shown) mounted on the cutterhead body. When the cutterhead body is driven to rotate about an axis, each cutter can cut the soil or rock layers at the working face.

[0049] An electrode mounting base 20 is disposed on the cutter head 10, and has a first through hole 21 extending along the thickness direction of the cutter head 10. The electrode mounting base 20 provides a mounting foundation for the transmitting electrode 10, allowing the transmitting electrode 10 to be more stably and reliably mounted on the cutter head 10 via the electrode mounting base 20. Compared to directly mounting the transmitting electrode on the cutter head, mounting the transmitting electrode on the cutter head via the electrode mounting base simplifies the machining and assembly of the cutter head, eliminating the need for complex machining of the cutter head. The first through hole 21 extending along the thickness direction of the cutter head 10 allows for the installation of the transmitting electrode while simultaneously enabling the installation of wiring electrically connected to the transmitting electrode on the rear side of the cutter head, thereby facilitating the protection of the relevant wiring.

[0050] The emitting electrode 30 has a first electrode portion 31 and a second electrode portion 32. The first electrode portion 31 passes through the first through hole 21, and the second electrode portion 32 is fixedly connected to the electrode mounting base 20 via a first connector 41. The emitting electrode 30 is connected to different parts of the electrode mounting base 20 via the first electrode portion 31 and the second electrode portion 32, which can achieve fixation in multiple mounting directions, so that the emitting electrode 30 is stably mounted on the electrode mounting base 20.

[0051] The first sealing and insulating component 50 is pressed between the emitting electrode 30 and the electrode mounting base 20, and between the emitting electrode 30 and the first connector 41, so that the emitting electrode 30 is insulated and sealed from both the electrode mounting base 20 and the first connector 41. The material of the first connector 41 may include a conductive metal or alloy.

[0052] By pressing a first sealing and insulating assembly between the emitting electrode and the electrode mounting base and between the emitting electrode and the first connector, the installation seal between the emitting electrode, the first connector and the electrode mounting base can be achieved, and effective insulation between the emitting electrode and the electrode mounting base and the first connector can be achieved.

[0053] refer to Figure 1 In some embodiments, the cutter head 10 has an opening 11, and the electrode mounting base 20 is fixedly disposed within the opening 11 and electrically connected to the cutter head 10 to form a shielding electrode together with the cutter head 10. For mounting the electrode mounting base on the cutter head, an opening can be provided on the cutter head, and the electrode mounting base can be fixedly disposed within the opening. The electrode mounting base can be made of metal and welded to the cutter head within the opening. The cutter head provides support and fixation for the electrode mounting base and is electrically connected to it, thereby enabling the cutter head and the electrode mounting base to together form a shielding electrode, allowing the current emitted by the emitting electrode to be focused onto the front region of the cutter head.

[0054] Opening 11 can be Figure 1The through hole extending along the thickness of the cutterhead, as shown, can also be a blind hole. The transmitting electrode can be fixedly mounted on the cutterhead using an electrode mounting base and a first connector fixedly installed within the cutterhead opening. Thus, during tunnel boring machine operation with the cutterhead assembly of this embodiment, the transmitting electrode can emit current to achieve real-time detection for advanced geological prediction.

[0055] Figure 2 This is a cross-sectional schematic diagram of the structure of the emitting electrode according to an embodiment of the cutter head assembly of this disclosure. Figure 3 This is a cross-sectional schematic diagram of the structure of the electrode mounting base according to an embodiment of the cutter head assembly of this disclosure. (Reference) Figure 1 and Figure 3 In some embodiments, the electrode mounting base 20 has a recessed portion 22 that is recessed relative to the front surface of the cutter head 10, the first through hole 21 is located at the bottom of the recessed portion 22, the second electrode portion 32 is located in the recessed portion 22 and is fixedly connected to the bottom of the recessed portion 22 by the first connector 41.

[0056] Because the transmitting electrode is located within the recessed portion of the electrode mounting base, it is protected from impacts by hard objects such as rocks in the soil when the cutterhead rotates and cuts through the soil. This reduces the risk of breakage and failure during use, ensuring the continuity of tunneling and exploration operations. Furthermore, the recessed portion, in conjunction with the first through hole, also positions the transmitting electrode during installation, facilitating the secure connection between the first connector and the transmitting electrode and the electrode mounting base.

[0057] exist Figure 1 and Figure 3 In this design, the electrode mounting base 20 may also have a protruding edge 23 located around the groove portion 22 and protruding relative to the front surface of the cutter head 10. The protruding edge protrudes forward relative to the front end faces of both the cutter head and the transmitting electrode. This allows the protruding edge to contact the soil or rock layer before the cutter head and the transmitting electrode when the electrode mounting base rotates with the cutter head to do so. The received impact and compressive forces are then transmitted through other parts of the electrode mounting base to the entire cutter head, effectively reducing the risk of the transmitting electrode being damaged or failing due to strong impacts or compression.

[0058] In terms of shape, along the thickness direction of the cutter head, the cross-section of the convex edge can be a closed shape such as a circular ring, an elliptical ring, or a polygonal ring (e.g., a square ring, a hexagonal ring, or an octagonal ring). Along the thickness direction of the cutter head, the cross-sectional shape of the groove can be consistent with the cross-sectional shape of the emitting electrode, for example, both can be circular, elliptical, or polygonal.

[0059] refer to Figure 1In some embodiments, the first connector 41 includes a fixing bolt, and the first sealing and insulating assembly 50 includes an electrode insulating gasket 51, a bolt insulating gasket 52, and an electrode insulating sleeve 53. The electrode insulating gasket 51 is located between the electrode mounting base 20 and the second electrode portion 32. The bolt insulating gasket 52 is located between the fixing bolt and the emitting electrode 30. The electrode insulating sleeve 53 is located between the first through hole 21 and the first electrode portion 31.

[0060] exist Figure 2 and Figure 3 In the design, the first electrode portion 31 of the emitting electrode 30 has a circumferential flange, on which multiple through holes 321 can be provided. The bottom of the groove portion 22 can be provided with multiple blind holes 221 corresponding to the multiple through holes 321. When the emitting electrode 30 is installed, the circumferential flange of the emitting electrode 30 is opposite to the bottom of the groove portion 22, and the multiple through holes 321 and the multiple blind holes 221 are aligned one by one. The fixing bolt passes through the through holes 321 and is threadedly connected to the internal thread of the blind hole 221.

[0061] A bolt insulating washer 52 is disposed between the fixing bolt and the emitting electrode 30 to achieve insulation and sealing between the fixing bolt and the emitting electrode 30. One or more bolt insulating washers 52 can be disposed between the fixing bolt and the emitting electrode 30. An insulating sleeve can be disposed between the fixing bolt and the through hole 321 to achieve sealing and insulation.

[0062] The electrode insulating gasket 51 is located between the electrode mounting base 20 and the second electrode portion 32, and can achieve a sealing and insulation effect between the surface of the first electrode portion 31 adjacent to the bottom of the groove portion 22 and the bottom of the groove. Accordingly, the electrode insulating gasket 51 may be provided with a through hole for the first connector 41 to pass through.

[0063] An electrode insulating sleeve 53 is located between the first through hole 21 and the first electrode portion 31. The electrode insulating sleeve 53 is fitted around the outer periphery of the first electrode portion 31, covering at least a portion of the first electrode portion 31, so as to achieve insulation and sealing between the electrode mounting base 20 having the first through hole 21 and the first electrode portion 31.

[0064] refer to Figure 1 and Figure 2 In some embodiments, the first electrode portion 31 extends relative to the rear surface of the cutter head 10 and is fixedly connected to the electrode mounting base 20 via a second connector 42. The cutter head assembly further includes a second sealing and insulating assembly 61, pressed between the second connector 42 and the electrode mounting base 20 to insulate and seal the second connector 42 from the electrode mounting base 20. The material of the second connector 42 may include a conductive metal or alloy.

[0065] The first electrode portion extends beyond the rear surface of the cutter head, facilitating wiring connection and maintenance. The second connector, through its connection with the first electrode portion, enables stable and reliable mounting of the emitting electrode on the electrode mounting base. When removal of the emitting electrode is required, it can be removed by loosening both the first and second connectors. A second sealing and insulating assembly is placed between the second connector and the rear surface of the electrode mounting base, and is pressed firmly by the fixing action of the second connector, thus achieving reliable insulation and sealing.

[0066] refer to Figure 1 In some embodiments, the second connector 42 includes an electrode retaining ring fitted around the outer periphery of the first electrode portion 31, and the second sealing and insulating assembly 61 includes a retaining ring insulating gasket located between the electrode retaining ring and the electrode mounting base 20. The electrode retaining ring can be connected to the first electrode portion 31 by a threaded connection. One or more retaining ring insulating gaskets may be provided between the electrode retaining ring and the electrode mounting base 20.

[0067] Figure 4 This is a cross-sectional schematic diagram of the mounting structure of the protective seat, edge computing module, and aviation connector according to an embodiment of the cutter head assembly of this disclosure. (Reference) Figure 1 , Figure 2 and Figure 4 In some embodiments, the first electrode portion 31 further has an extension portion 311 extending relative to the rear surface of the cutter head 10. The cutter head assembly also includes a protective seat 70 and a third sealing and insulating assembly 62.

[0068] A protective seat 70 is disposed on the side of the electrode mounting base 20 away from the second electrode portion 32 and is electrically connected to the electrode mounting base 20. A third sealing and insulating assembly 62 is pressed between the protective seat 70 and the first electrode portion 31 to insulate and seal the first electrode portion 31 from the protective seat 70. The third sealing and insulating assembly 62 may include an insulating sleeve with a flange that is fitted onto the protruding portion 311, and the flange abuts against the surface of the opening 72 on one side.

[0069] A protective seat 70 is provided on the side of the electrode mounting base 20 away from the second electrode portion 32, that is, on the rear side of the electrode mounting base 20. This protects the first electrode portion 31 extending from the rear side of the electrode mounting base 20 and facilitates installation, removal, and maintenance behind the cutter head. A third sealing and insulating component 63 is disposed between the second through hole 72 on the protective seat 70 and the protruding portion 311 of the first electrode portion 31. It can cooperate with the opening 72 of the protective seat 70 to support the protruding portion 311 and achieve sealing and insulation functions.

[0070] refer to Figure 1and Figure 4 In some embodiments, the protective base 70 includes a base body 71. The base body 71 may be made of a conductive metal or alloy and may be fixed and electrically connected to the electrode mounting base 20 via a connector.

[0071] The base 71 has a first inner cavity C1, which is adjacent to the surface of the electrode mounting base 20 away from the second electrode portion 32. The first electrode portion 31 is fixedly connected to the electrode mounting base 20 by a second connector 42. The cutter head assembly also includes a second sealing and insulating component 61 pressed between the second connector 42 and the electrode mounting base 20. Both the second connector 42 and the second sealing and insulating component 61 are located within the first inner cavity C1.

[0072] By providing the second connector 42 and the second sealing and insulating assembly 61 in the first inner cavity, the protection of the first electrode portion 31, the second connector 42, and the second sealing and insulating assembly 61 can be achieved.

[0073] refer to Figure 1 and Figure 4 In some embodiments, the base 71 further has a second inner cavity C2 spaced apart from the first inner cavity C1. The second inner cavity C2 communicates with the first inner cavity C1 through a second through hole 72, and the second inner cavity C2 is located on the side of the first inner cavity C1 away from the electrode mounting base 20. The protruding portion 311 passes through the first inner cavity C1 and is inserted into the second through hole 72. The third sealing and insulating assembly 62 is located between the protruding portion 311 and the second through hole 72. The cutter head assembly further includes an edge computing module 80 located in the second inner cavity C2.

[0074] The second through hole 72 can cooperate with the third sealing and insulating component 62 to support the protruding part 311 and to achieve insulation and sealing between the protective seat 70 and the protruding part 311. The edge computing module 80 located in the second inner cavity C2 is spaced apart from other components located in the first inner cavity C1, which facilitates the maintenance and replacement of the edge computing module 80.

[0075] exist Figure 1 and Figure 4 In this embodiment, the edge computing module 80 may include an edge computing element 81 and an insulating protective layer 82 covering the edge computing element 81. The insulating protective layer 82 may be made of epoxy resin encapsulating the edge computing element 81 to achieve insulation protection of the edge computing element 81 and reduce its short-circuit risk.

[0076] The edge computing element 81 is electrically connected to the first electrode portion 31 via a transmitting electrode cable 83 and to the protective base 70 via a shielding electrode cable 84. The edge computing element 81 can receive signals from the host communicating with it via the main cable, and after processing the signals, can provide current of different frequencies to the transmitting electrode and the shielding electrode.

[0077] To effectively secure the edge computing module 80, in some embodiments, the protective base 70 further includes an end cap 73, detachably connected to the cavity wall of the second inner cavity C2, and used to secure the edge computing module 80 by abutting against it. When maintenance of the edge computing module 80 is required, the end cap 73 can be removed to take it out. The end cap 73 also serves to isolate the edge computing module 80 from the external environment of the protective base.

[0078] exist Figure 1 and Figure 4 The protective base 70 may further include a sealed socket 74 disposed on the base body 71 and located outside the second inner cavity C2. The sealed socket 74 is electrically connected to the edge computing element 81 via a main cable. The sealed socket 74 can be mounted to the side of the protective base 70 with screws. The cutter head assembly may further include an aviation plug 90, which is threadedly connected to the sealed socket 74 and has a lead cable 91 to provide a signal channel for the edge computing module 80.

[0079] By using a sealed socket and aviation connector, the lead-out cable 91 can be easily separated from the edge computing module 80 for easy installation and maintenance. The sealed socket 74 provides a good seal, preventing external impurities from entering the second inner cavity C2 and adversely affecting the edge computing module 80 and related cables within the second inner cavity C2.

[0080] In the above embodiments, the cutter head 10 can be a normal pressure cutter head. This type of cutter head is pressurized at the front and at normal pressure at the rear, allowing personnel to move around on the rear side. Correspondingly, the requirements for the cutter head's sealing and waterproofing are relatively high. However, the embodiments of this disclosure, through the cooperation of the electrode mounting base, the emitting electrode, various connectors, various sealing and insulating components, and the protective base, can effectively ensure the sealing and waterproofing requirements of the cutter head and meet the insulation requirements of the emitting electrode.

[0081] Tunnel boring machines that use atmospheric pressure cutterheads can be slurry shield machines. The atmospheric pressure cutterhead can effectively prevent slurry from entering the rear of the cutterhead from the installation position of the transmitting electrode. Furthermore, the transmitting electrode and the shielding electrode formed by the cutterhead and the electrode mounting base can come into contact with the slurry during the tunneling process of the slurry shield machine to achieve real-time detection.

[0082] Therefore, this disclosure also provides a slurry shield tunneling machine, including the cutterhead assembly of any of the foregoing embodiments. The slurry shield tunneling machine here can be a large-diameter slurry shield tunneling machine. After receiving the command signal from the host machine, the edge computing module controls the transmitting electrode to emit a stable current into the stratum, and simultaneously controls the shielding electrode (cutterhead and electrode mounting base) to emit the same type of current. Based on the principle of like charges repelling each other, the emitted current is stably emitted towards the face of the tunnel face. The sealed insulation component between the transmitting electrode and the shielding electrode ensures that the two electrodes do not conduct. When the host machine requires different frequencies of emitted current, the edge computing module can control the transmitting electrode and the shielding electrode according to the host machine's emission command, further completing the entire measurement process.

[0083] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0084] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A cutter head assembly, characterized in that, include: Cutterhead; An electrode mounting base is disposed on the cutter head and has a first through hole extending along the thickness direction of the cutter head; The emitting electrode has a first electrode portion and a second electrode portion, the first electrode portion passing through a first through hole, and the second electrode portion being fixedly connected to the electrode mounting base by a first connector; and A first sealing and insulating assembly is pressed between the emitting electrode and the electrode mounting base and between the emitting electrode and the first connector, so that the emitting electrode is insulated from and sealed to both the electrode mounting base and the first connector; The cutter head has an opening, and the electrode mounting base is fixedly disposed in the opening and electrically connected to the cutter head to form a shielding electrode together with the cutter head. The electrode mounting base has a recessed portion relative to the front surface of the cutter head, the first through hole is located at the bottom of the recessed portion, the second electrode portion is located in the recessed portion, and is fixedly connected to the bottom of the recessed portion through the first connector.

2. The cutter head assembly according to claim 1, characterized in that, The electrode mounting base also has a protruding edge located around the groove and protruding relative to the front surface of the cutter head.

3. The cutter head assembly according to claim 1, characterized in that, The first connector includes a fixing bolt, and the first sealing and insulating assembly includes: An electrode insulating pad is located between the electrode mounting base and the second electrode portion; A bolt insulating washer is located between the fixing bolt and the emitting electrode; and An electrode insulating sleeve is located between the first through hole and the first electrode portion.

4. The cutter head assembly according to claim 1, characterized in that, The first electrode portion extends relative to the rear surface of the cutter head and is fixedly connected to the electrode mounting base by a second connector; the cutter head assembly further includes: A second sealing and insulating component is pressed between the second connector and the electrode mounting base to insulate and seal the second connector from the electrode mounting base.

5. The cutter head assembly according to claim 4, characterized in that, The second connector includes an electrode pressure ring, which is fitted onto the outer periphery of the first electrode portion. The second sealing and insulating assembly includes: An insulating gasket is located between the electrode retaining ring and the electrode mounting base.

6. The cutter head assembly according to claim 1, characterized in that, The first electrode portion further has a protruding portion extending relative to the rear surface of the cutter head; the cutter head assembly further includes: A protective base is disposed on the side of the electrode mounting base away from the second electrode portion and is electrically connected to the electrode mounting base; and A third sealing and insulating component is pressed between the protective seat and the protruding portion to insulate and seal the first electrode portion from the protective seat.

7. The cutter head assembly according to claim 6, characterized in that, The protective base includes a base body having a first inner cavity, the first inner cavity being adjacent to the surface of the electrode mounting base on the side away from the second electrode portion, the first electrode portion being fixedly connected to the electrode mounting base by a second connector; the cutter head assembly further includes a second sealing and insulating component pressed between the second connector and the electrode mounting base, both the second connector and the second sealing and insulating component being located within the first inner cavity.

8. The cutter head assembly according to claim 7, characterized in that, The base also has a second inner cavity spaced apart from the first inner cavity, the second inner cavity being connected to the first inner cavity through a second through hole, the second inner cavity being located on the side of the first inner cavity away from the electrode mounting base; the protruding portion passes through the first inner cavity and is inserted into the second through hole, the third sealing and insulating assembly being located between the protruding portion and the second through hole; the cutter head assembly further includes: an edge calculation module located in the second inner cavity.

9. The cutter head assembly according to claim 8, characterized in that, The edge computing module includes an edge computing element and an insulating protective layer covering the edge computing element. The edge computing element is electrically connected to the first electrode portion via a transmitting electrode cable and to the protective base via a shielding electrode cable.

10. The cutter head assembly according to claim 8, characterized in that, The protective base also includes an end cap, which is detachably connected to the cavity wall of the second inner cavity and secures the edge computing module by abutting against it.

11. The cutter head assembly according to claim 9, characterized in that, The protective base also includes a sealing socket disposed on the base body and located outside the second inner cavity, the sealing socket being electrically connected to the edge computing element; the cutter head assembly also includes: An aviation plug, threaded to the sealed socket, and having a lead-out cable.

12. The cutter head assembly according to any one of claims 1 to 11, characterized in that, The cutter head is an atmospheric pressure cutter head.

13. A slurry shield tunneling machine, characterized in that, include: The cutter head assembly according to any one of claims 1 to 12.

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