Eccentric mother-child shield tunneling machine with displacement type main driving device

Abstract

The invention relates to the technical field of tunnel construction equipment and construction, in particular to an eccentric primary and secondary shield tunneling machine with a displacement type main driving device, which comprises a primary machine shield body, a secondary machine shield body, a primary cutter head, a secondary cutter head and the main driving device, the primary and secondary cutterheads comprise a primary cutterhead and a secondary cutterhead which are detachably connected, the primary driving device is arranged in the secondary shield body and can move in the radial direction of the secondary shield body, the front end of the primary driving device is in transmission connection with the secondary cutterhead, and in the primary shield mode, the primary driving device drives the primary and secondary cutterheads to conduct tunneling along the path of the center line of the primary shield body; and in the sub-shield mode, the main driving device drives the sub-cutterhead to perform tunneling along a path deviating from the center line of the main machine shield body. The central axis of the main driving device is adjusted according to the tunneling mode, the effect that one set of main driving device has two purposes is achieved through displacement of the main driving device, the structural arrangement is optimized, and the manufacturing cost of equipment is reduced.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction equipment and construction technology, and in particular to an eccentric mother-child shield machine with a displacement-type main drive device. Background Art

[0002] The mother-child shield machine is a special shield machine technology. Its characteristics are that it can push out a smaller diameter shield in a larger diameter shield to carry out more sophisticated tunneling operations; it can adapt to complex geological conditions and improve the efficiency and safety of tunneling. At the same time, since the child shield can operate under the protection of the mother shield, it also reduces the risk during the construction process.

[0003] In the existing patented technology, the drive device of the shield machine corresponds to the cutter disc one by one, and the installation positions of the two are relatively fixed, that is, one set of drive devices drives one cutter disc to move, so as to realize the excavation of rock and soil; the central axis of the drive device coincides with the central axis of the cutter disc excavation profile, and some drive devices are provided with a telescopic device at the rear, which enables the drive device and the cutter disc to move along the central axis together, and eccentric displacement cannot be realized. For a mother-child shield machine, which is a tunneling machine with at least two cutter discs (one mother machine cutter disc and one child machine cutter disc), at least two sets of main drive devices need to be configured, resulting in high equipment structure complexity and high cost. When the mother-child shield machine needs to realize that the center of the mother shield excavation section is not concentric with the center of the child shield excavation section (for example, in the integrated construction of the platform and tunnel, the central axis of the subway tunnel is lower than the central axis of the platform tunnel), the existing patented technology is difficult to achieve, and it is usually achieved by excavation + manual backfilling through secondary construction operations, which not only increases the construction cost and causes waste of excavation space, but also greatly increases the labor intensity and causes the extension of the construction period.

[0004] In summary, the existing patents cannot achieve eccentric displacement of the main drive. Even if it can achieve movement in the front-to-back direction, a set of main drive devices can only correspond to one cutterhead. For a tunnel boring machine with multiple cutterheads, such as a mother-child shield machine, it is necessary to configure multiple sets of main drive devices, which have high structural complexity and high cost. Therefore, it is urgent to invent a displacement-type main drive device and an eccentric mother-child shield machine, which can achieve the displacement of the main drive, and can adjust the central axis of the main drive according to the excavation mode of the mother-child shield machine, so that a set of main drive devices can meet the excavation use of the mother shield mode and the child shield mode of the eccentric mother-child shield machine, thereby improving construction efficiency and reducing construction costs. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] The present invention provides an eccentric mother-child shield machine with a displacement-type main drive device, aiming to solve the problems of low construction efficiency caused by the inability of the main drive to achieve eccentric displacement and high cost caused by the multiple sets of main drives.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the present invention proposes an eccentric mother-child shield machine with a displaceable main drive device, including a mother machine shield body, a child machine shield body, a mother-child cutter disc and a main drive device. The child machine shield body is arranged inside the mother machine shield body and is eccentrically arranged with the mother machine shield body. The mother-child cutter disc includes a detachably connected mother cutter disc and a child cutter disc, and the child cutter disc can drive the mother cutter disc to rotate. The main drive device is arranged inside the child machine shield body and can move radially along the child machine shield body. The front end of the main drive device is connected to the child cutter disc in a transmission manner. In the mother shield mode, the main drive device drives the mother-child cutter disc to excavate along the path of the center line of the mother machine shield body; in the child shield mode, the main drive device drives the child cutter disc to excavate along a path deviating from the center line of the mother machine shield body.

[0009] A further technical solution is that the mother machine shield is connected to a mother machine propulsion device, and the sub-machine shield is connected to a sub-machine propulsion device.

[0010] A further technical solution is that the main drive device includes a main drive assembly and a displacement mechanism. The main drive assembly is connected to the sub-cutter disc and can drive the sub-cutter disc to rotate. The displacement mechanism is arranged between the main drive assembly and the sub-machine shield and can drive the main drive assembly to move up and down.

[0011] A further technical solution is that the displacement mechanism includes a displacement box and a displacement mechanism. The displacement box has a slot on the outside, and the sub-machine shield has a boss on the inside that matches the slot, and the slot and the boss are connected by a connector. The displacement mechanism is located between the displacement box and the sub-machine shield, and can drive the displacement box to move up and down.

[0012] A further technical solution is that the displacement mechanism is in the form of a displacement cylinder or a rack and pinion displacement mechanism.

[0013] A further technical solution is that the displacement mechanism comprises a displacement oil cylinder and a support seat. The displacement oil cylinder is fixed to the inner side of the sub-machine shield through the support seat, and its output end is connected to the displacement box.

[0014] A further technical solution is that the displacement box includes a sealing plate, a sealing member, a connecting plate and a bearing ring. The sealing plate, the bearing ring and the connecting plate are connected in sequence to form the slot, the connecting plate is provided with multiple groups of first connecting holes, the boss is provided with multiple groups of second connecting holes corresponding to the first connecting holes, and the first connecting holes and the second connecting holes are connected by bolts. The inner side of the bearing ring is fixedly connected to the main drive assembly, and the sealing member is provided between the sealing plate and the boss.

[0015] A further technical solution is that the main drive assembly and the sub-cutter disc are connected via a torque beam transmission.

[0016] A further technical solution is that the sub-cutter disc is nested and connected inside the main cutter disc. When the main shield mode is used for excavation, the sub-cutter disc drives the main cutter disc to rotate together; when the sub-shield mode is used for excavation, the sub-cutter disc is separated from the main cutter disc and rotates independently.

[0017] A further technical solution is to also include a slag discharge system, a segment assembly system, a segment transportation system, an electrical system, a hydraulic system, and a fluid system.

[0018] (III) Beneficial effects

[0019] The mother-child shield machine with a displacement-type main drive device provided by the present invention can excavate tunnels of two different diameters. Since the sub-cutter disc can be separated from the mother-child cutter disc, a smooth conversion from the mother shield excavation mode to the sub-shield excavation mode can be achieved in the construction tunnel, without the need to excavate an intermediate foundation pit, which greatly reduces the impact of surface structures on construction planning, and reduces the project period and construction cost. The main drive device is arranged inside the sub-machine shield body and can move radially along the sub-machine shield body, thereby realizing the displacement of the main drive device. The central axis of the main drive device is adjusted according to the excavation mode of the mother-child shield machine, so that a set of main drive devices can meet the excavation use of the mother shield mode and the sub-shield mode of the eccentric mother-child shield machine, achieving the effect of a set of dual-purpose drives, which not only optimizes the structural layout, but also reduces the number of drives and reduces the manufacturing cost of the equipment. The main drive device is installed in the sub-machine shield body of the eccentric mother-child shield machine. When the mother shield mode is excavated, the central axis of the main drive device coincides with the central axis of the mother machine shield body. At this time, the main drive device drives the mother and child cutter discs to rotate and excavate; when the sub-shield mode is excavated, the central axis of the main drive device coincides with the central axis of the sub-machine shield body. At this time, the main drive device drives the sub-cutter disc to rotate and excavate, ultimately realizing the excavation of an eccentric tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an eccentric mother-child shield machine in the mother shield mode;

[0021] Figure 2 This is a schematic diagram of the shield of the sub-machine after it is detached in the sub-shield mode;

[0022] Figure 3 This is a schematic diagram of the eccentric structure layout of the mother and child cutter discs;

[0023] Figure 4 It is a schematic diagram of the connection status of the main drive device in the mother shield mode;

[0024] Figure 5 It is a schematic diagram of the connection status of the main drive device in the sub-shield mode;

[0025] Figure 6 It is the structural schematic diagram of the position change box;

[0026] Figure 7 This is a schematic diagram of the mother-child shield construction.

[0027] [Description of Reference Numerals]

[0028] 1: mother machine shield; 2: sub-machine shield; 21: boss; 3: mother and child cutter discs; 31: mother cutter disc; 32: sub-cutter disc; 4: main drive device; 41: main drive assembly; 42: displacement mechanism; 421: displacement box; 4211: sealing plate; 4212: sealing element; 4213: connecting plate; 4214: load-bearing ring; 422: displacement cylinder; 423: support seat; 5: mother machine propulsion device; 6: sub-machine propulsion device; 7: slot; 8: torque beam; 9: sub-machine shield centerline; 10: mother machine shield centerline. DETAILED DESCRIPTION

[0029] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0030] This embodiment provides an eccentric mother-child shield machine with a variable position main drive device, such as Figure 1-Figure 3 As shown, it includes a mother machine shield body 1, a child machine shield body 2, a mother-child cutter disc 3 and a main drive device 4. The child machine shield body 2 is arranged inside the mother machine shield body 1 and is eccentrically configured with the mother machine shield body 1; the mother-child cutter disc 3 includes a detachably connected mother cutter disc 31 and a child cutter disc 32, and the child cutter disc 32 can drive the mother cutter disc 31 to rotate; the main drive device 4 is arranged inside the child machine shield body 2 and can move along the radial direction of the child machine shield body 2, and the front end of the main drive device 4 is transmission-connected with the child cutter disc 32. When in the mother shield mode, the main drive device 4 drives the mother-child cutter disc 3 to excavate along the path of the center line of the mother machine shield body 1; when in the child shield mode, the main drive device 4 drives the child cutter disc 32 to excavate along the path deviating from the center line of the mother machine shield body 1.

[0031] It should be noted that the shield machine has two excavation modes, the mother shield mode and the child shield mode; in the mother shield mode, the child cutter disc 32 drives the mother cutter disc 31, that is, the mother and child cutter discs 3 to rotate as a whole for excavation, and the center line of the main drive device 4 coincides with the center line 10 of the mother machine shield; in the child shield mode, the child cutter disc 32 is separated from the mother cutter disc 31 for excavation, and the center line of the main drive device 4 coincides with the center line 9 of the child machine shield. The mother cutter disc 31 and the child cutter disc 32 are connected and fixed by wedge grooves and bolts, and other forms of transmission connection can also be used.

[0032] The eccentric mother-child shield machine with a displacement-type main drive device in this embodiment can realize the displacement of the main drive device 4, so that the central axis of the main drive device 4 is adjusted according to the excavation mode of the mother-child shield machine, so that a set of main drive devices 4 can meet the excavation use of the mother shield mode and the child shield mode of the eccentric mother-child shield machine. Through the displacement of the main drive device 4, a set of main drive device 4 can meet the construction requirements of the two excavation modes of the mother-child shield, and there is no need to excavate the foundation pit in advance when the two modes are switched, which greatly reduces the construction workload and cost.

[0033] Specifically, in this embodiment, the mother machine shield body 1 is connected to the mother machine propulsion device 5, and the sub-machine shield body 2 is connected to the sub-machine propulsion device 6. The mother machine propulsion device 5 is installed in the mother machine shield body 1 to provide propulsion for the mother shield when it is excavating; the sub-machine propulsion device 6 is installed in the sub-machine shield body 2 to provide propulsion for the sub-shield when it is excavating. Here, the mother machine propulsion device 5 and the sub-machine propulsion device 6 both adopt a propulsion structure of a hydraulic cylinder.

[0034] Reference Figure 4-Figure 6 As shown, in this embodiment, the main drive device 4 includes a main drive assembly 41 and a displacement mechanism 42. The main drive assembly 41 is connected to the sub-cutter disc 32 and can drive the sub-cutter disc 32 to rotate. The displacement mechanism 42 is arranged between the main drive assembly 41 and the sub-machine shield body 2 and can drive the main drive assembly 41 to move up and down. Specifically, the displacement mechanism 42 includes a displacement box 421 and a displacement mechanism; the outer side of the displacement box 421 has a card slot 7, and the inner side of the sub-machine shield body 2 is provided with a boss 21 that cooperates with the card slot 7, and the card slot 7 and the boss 21 are connected by a connecting piece; the displacement mechanism is located between the displacement box 421 and the sub-machine shield body 2, and can drive the displacement box 421 to move up and down.

[0035] The displacement mechanism 42 enables the main drive assembly 41 to be stably installed in the sub-machine shield 2, and the coordination between the slot 7 and the boss 21 and the connection of the connecting piece ensures the stability of the main drive assembly 41 during the excavation process. This stability is crucial to ensure the excavation quality and construction safety.

[0036] The main drive assembly 41 is installed in the sub-machine shield 2 of the eccentric mother-child shield machine through the displacement box 421. When the mother shield machine is excavating, the displacement box 421 position is adjusted by the displacement cylinder 422, so that the central axis of the main drive assembly 41 coincides with the center line 10 of the mother shield. At this time, the main drive assembly 41 drives the mother-child cutterhead 3 to rotate and excavate; when the sub-shield machine is excavating, the displacement box 421 position is adjusted by the displacement cylinder 422, so that the central axis of the main drive assembly 41 coincides with the center line 9 of the sub-machine shield. At this time, the main drive assembly 41 drives the sub-cutterhead 32 to rotate and excavate. Specifically, the displacement mechanism in this embodiment is in the form of a displacement cylinder 422, and of course it can also be a gear rack moving mechanism.

[0037] The main drive assembly 41 is installed in the slave shield 2 through the position change box 421. This modular design makes it easier to maintain and replace the main drive assembly 41. When the main drive assembly 41 fails or needs to be upgraded, it can be easily removed from the position change box 421 for repair or replacement, reducing maintenance costs and downtime.

[0038] In this embodiment, the displacement mechanism includes a displacement cylinder 422 and a support seat 423. The displacement cylinder 422 is fixed to the inner side of the shield body 2 of the sub-machine through the support seat 423, and its output end is connected to the displacement box 421. Specifically, the displacement box 421 includes a sealing plate 4211, a sealing member 4212, a connecting plate 4213 and a bearing ring 4214. The sealing plate 4211, the bearing ring 4214 and the connecting plate 4213 are connected in sequence to form a card slot 7. The connecting plate 4213 is provided with multiple groups of first connecting holes, and the boss 21 is provided with multiple groups of second connecting holes corresponding to the first connecting holes. The first connecting holes and the second connecting holes are connected by bolts. The connection between the displacement box 421 and the boss 21 adopts a bolt connection method, which is not only simple and reliable, but also easy to install and disassemble, which is conducive to the maintenance and replacement of the displacement mechanism. The inner side of the bearing ring 4214 is fixedly connected to the main drive assembly 41, and a sealing member 4212 is provided between the sealing plate 4211 and the boss 21. A seal 4212 is installed on the sealing plate 4211 to prevent debris from entering the rear of the main machine.

[0039] By sequentially connecting the sealing plate 4211, the bearing ring 4214 and the connecting plate 4213, a strong card slot 7 is formed, which can withstand large forces and pressures, and ensure the stability of the displacement mechanism during the excavation process. The support seat 423 is arranged in the sub-machine shield 2, and one end of the displacement cylinder 422 is installed on the support seat 423, and the other end is connected to the displacement box 421, so that the displacement box 421 can be moved in the up and down directions, thereby driving the main drive assembly 41 to achieve displacement to correspond to the central axis of the mother and child cutter discs 3 and the sub-cutter discs 32.

[0040] Specifically, in this embodiment, the main drive assembly 41 and the sub-cutter disc 32 are connected by a torque beam 8. As a transmission connection, the torque beam 8 can directly transmit the torque generated by the main drive assembly 41 to the sub-cutter disc 32 without too many transmission links in the middle, thereby reducing energy loss and the decline in transmission efficiency. This direct and efficient torque transmission method can ensure that the sub-cutter disc 32 obtains sufficient driving force during the excavation process and improves the excavation efficiency. Since the torque beam 8 realizes efficient and stable torque transmission, it reduces wear and damage during the transmission process, thereby extending the service life of the entire excavation system. At the same time, the torque beam 8 itself also has high durability and can withstand various loads and stresses in the excavation process for a long time, ensuring the long-term stable operation of the system.

[0041] In this embodiment, the sub-cutter disc 32 is nested and connected inside the mother cutter disc 31. Specifically, when the mother shield mode is excavated, the sub-cutter disc 32 drives the mother cutter disc 31 to rotate together, that is, the mother and sub-cutter discs 3 rotate as a whole; when the sub-shield mode is excavated, the sub-cutter disc 32 is separated from the mother cutter disc 31 and rotates alone.

[0042] The eccentric mother-child shield machine with a displacement-type main drive device in this embodiment also includes a slag removal system, a segment assembly system, a segment transportation system, an electrical system, a hydraulic system, and a fluid system. These systems ensure that the whole machine works smoothly.

[0043] In summary, the construction process of the eccentric mother-child shield machine with a variable position main drive device provided in this embodiment is as follows:

[0044] First, the mother shield mode is used to carry out the excavation construction of the first-level tunnel. The mother cutter disc 31 and the child cutter disc 32 are installed together to form a complete mother-child cutter disc 3. The position of the displacement box 421 is adjusted by the displacement cylinder 422, so that the central axis of the main drive assembly 41 coincides with the central axis of the mother-child cutter disc 3, and the first connecting hole on the displacement box 421 and the second connecting hole on the child machine shield body 2 are fixed by bolts. After the torque beam 8 between the main drive assembly 41 and the child cutter disc 32 is connected, the main drive assembly 41 can drive the mother-child cutter disc 3 to rotate, and the mother machine propulsion device 5 provides the mother machine shield with propulsion force to move forward, thereby realizing the excavation construction of the tunnel 1.

[0045] Reference Figure 7As shown, after the construction of tunnel 1 is completed, the sub-shield mode is used to carry out the excavation construction of the secondary tunnel. At this time, the main drive device 4 needs to be displaced so that the central axis of the main drive device 4 coincides with the central axis of the sub-machine shield body 2. The first connecting hole on the displacement box 421 and the second connecting hole on the sub-machine shield body 2 are fixed by bolts. After that, the connecting bolts of the mother cutter disc 31 and the sub-cutter disc 32 are removed, and the connecting bolts of the mother machine shield body 1 and the sub-machine shield body 2 are removed. The main drive assembly 41 drives the sub-cutter disc 32 to rotate, and the sub-machine propulsion device 6 provides the sub-machine shield body 2 with a propulsion force to move forward, thereby realizing the excavation construction of the secondary tunnel.

[0046] It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, in the present embodiment, the descriptions involving "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this embodiment, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0049] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. An eccentric mother-child shield machine with a displacement-type main drive device (4), characterized in that: It comprises a main machine shield body (1), a sub-machine shield body (2), a main and sub-machine cutter disc (3) and a main drive device (4); The sub-machine shield (2) is arranged inside the main machine shield (1) and is eccentrically arranged with respect to the main machine shield (1); the main and sub-machine blade discs (3) include a main blade disc (31) and a sub-blade disc (32) that are detachably connected; and the sub-blade disc (32) can drive the main blade disc (31) to rotate; The main drive device (4) is arranged inside the sub-machine shield body (2) and is capable of moving along the radial direction of the sub-machine shield body (2), and the front end of the main drive device (4) is drivingly connected to the sub-cutter disc (32); In the mother shield mode, the main drive device (4) drives the mother and child cutter discs (3) to perform excavation along a path along the center line of the mother shield body (1); in the child shield mode, the main drive device (4) drives the child cutter discs (32) to perform excavation along a path deviating from the center line of the mother shield body (1).

2. The eccentric mother-child shield machine with a displacement-type main drive device (4) according to claim 1, characterized in that: The mother machine shield (1) is connected to a mother machine propulsion device (5), and the sub-machine shield (2) is connected to a sub-machine propulsion device (6).

3. The eccentric mother-child shield machine with a displacement-type main drive device (4) according to claim 1, characterized in that: The main drive device (4) comprises a main drive assembly (41) and a displacement mechanism (42); The main driving component (41) is connected to the sub-cutter disc (32) and is capable of driving the sub-cutter disc (32) to rotate; The displacement mechanism (42) is arranged between the main drive component (41) and the sub-machine shield body (2) and is capable of driving the main drive component (41) to move up and down.

4. The eccentric mother-child shield machine with a displacement-type main drive device (4) as claimed in claim 3, characterized in that: The displacement mechanism (42) comprises a displacement box (421) and a displacement mechanism; The outer side of the position shifting box (421) is provided with a slot (7), the inner side of the sub-machine shield (2) is provided with a boss (21) that matches the slot (7), and the slot (7) and the boss (21) are connected via a connecting piece; The displacement mechanism is located between the position changing box (421) and the sub-machine shield (2), and is capable of driving the position changing box (421) to move up and down.

5. The eccentric mother-child shield machine with a displacement-type main drive device (4) as claimed in claim 4, characterized in that: The displacement mechanism is in the form of a displacement cylinder (422) or a gear rack displacement mechanism.

6. The eccentric mother-child shield machine with a displacement-type main drive device (4) as claimed in claim 5, characterized in that: The displacement mechanism comprises a displacement cylinder (422) and a support seat (423); The displacement oil cylinder (422) is fixed to the inner side of the sub-machine shield (2) via the support seat (423), and its output end is connected to the displacement box (421).

7. The eccentric mother-child shield machine with a displacement-type main drive device (4) according to claim 6, characterized in that: The displacement box (421) comprises a sealing plate (4211), a sealing member (4212), a connecting plate (4213) and a bearing ring (4214); The sealing plate (4211), the carrying ring (4214) and the connecting plate (4213) are connected in sequence to form the clamping groove (7); the connecting plate (4213) is provided with a plurality of groups of first connecting holes; the boss (21) is provided with a plurality of groups of second connecting holes corresponding to the first connecting holes; the first connecting holes and the second connecting holes are connected by bolts; The inner side of the bearing ring (4214) is fixedly connected to the main driving assembly (41), and the sealing member (4212) is arranged between the sealing plate (4211) and the boss (21).

8. The eccentric mother-child shield machine with a displacement-type main drive device (4) as described in claims 1 to 7, characterized in that: The main drive assembly (41) and the sub-cutter disc (32) are connected in transmission via a torque beam (8).

9. The eccentric mother-child shield machine with a displacement-type main drive device (4) according to claim 1, characterized in that: The sub-cutter disc (32) is nested and connected inside the main cutter disc (31); When the main shield machine is excavating, the sub-cutter disc (32) drives the main cutter disc (31) to rotate together; When tunneling in the sub-shield mode, the sub-cutter disc (32) is separated from the main cutter disc (31) and rotates independently.

10. The eccentric mother-child shield machine with a displacement-type main drive device (4) according to claim 1, characterized in that: It also includes slag discharge system, segment assembly system, segment transportation system, electrical system, hydraulic system and fluid system.

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