A curved tunnel tunneling and residue discharging system and a tunneling machine

Abstract

The present application relates to the field of tunneling, in particular to a curved tunneling out of residue system and a tunneling machine. The curved tunneling out of residue system comprises a frame body and a conveyor belt on the frame body. The frame body comprises a front frame body for hinged connection with a front shield of the tunneling machine and a rear frame body for hinged connection with a support shield of the tunneling machine. Both the front frame body and the rear frame body are rigid frame bodies and the hinged axes extend upward and downward. Since the frame body is hinged with the front shield and the support shield, when the front shield and the support shield have a certain angle, the frame body will present a certain angle with the front shield and the support shield respectively. Since the front frame body and the rear frame body are rigid frames, they can bear a large weight, which is convenient for improving the single-time residue conveying capacity, and further solves the problems of the existing technology, such as the wrinkles on the belt caused by the elastic deformation of the belt during turning, the limited weight bearing capacity of the belt, and the limited single-time residue conveying capacity.

Description

Technical Field

[0001] This invention relates to the field of tunneling, and more particularly to a muck removal system and tunneling machine for curved tunnel excavation. Background Technology

[0002] A tunnel boring machine (TBM) consists of a cutterhead for excavation and a conveyor belt located behind the cutterhead to transport the excavated material. The conveyor belt is connected to the front shield and the rear support structure. During straight-line tunneling, the conveyor belt operates in a straight-line transport mode. However, when the tunnel has a certain angle, the front shield and the rear support structure will also have a certain angle, which will generate torque on the conveyor belt, hindering its operation. Therefore, special design is required for the conveyor belt during the excavation of curved tunnels.

[0003] For example, Chinese utility model patent CN214326256U discloses a small-turn conveyor belt and a small-turn belt conveyor. The conveyor belt includes a circulating traction belt and a load-bearing plate located on the traction belt. The load-bearing plate is a rigid structure used for transporting excavated soil, and the traction belt is a specially made elastic belt. When the conveyor belt is located on a path that needs to turn, it automatically adapts through the elastic deformation of the traction belt, allowing the load-bearing plate capable of carrying excavated soil to change angles on the elastic belt, thereby enabling the conveyor belt to adapt to different angles.

[0004] However, in the above technical solution, although the belt conveyor will rotate under the action of elasticity during the turning process, the traction belt in the belt conveyor will wrinkle during deformation, which will lead to unevenness on the bearing plate and material leakage. In addition, since the traction belt is an elastic belt, it cannot bear a large weight, so the amount of slag conveyed is limited. Summary of the Invention

[0005] The purpose of this invention is to provide a curved tunnel excavation and muck removal system to solve the problems of material leakage caused by the elastic deformation of belts during turning in the prior art, as well as the limited weight-bearing capacity of the belts and the limited amount of muck transported at one time. The purpose of this invention is also to provide a tunneling machine to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the curved tunnel excavation and muck removal system of the present invention adopts the following technical solution:

[0007] A curved tunnel excavation muck removal system includes a frame and a conveyor belt located on the frame. The frame includes a front frame for hinged connection with the front shield of the tunneling machine and a rear frame for hinged connection with the support shield of the tunneling machine. Both the front and rear frames are rigid frames and their hinge axes extend vertically.

[0008] The beneficial effects of the above technical solution are as follows: This invention improves the existing curved tunnel excavation and muck removal system. During the excavation of a curved tunnel, the cutterhead and front shield bend with the tunnel. When a curve occurs, the front shield and support shield are in different positions, resulting in a certain angle. Since the frame is hinged to the front shield and support shield respectively, the frame will also present a certain angle with the front shield and support shield respectively. When the conveyor belt starts to bear force, it will be stressed at the hinge point, causing rotation, which keeps the conveyor belt straight. Moreover, since both the front and rear frames are rigid frames, they can withstand a large weight, which facilitates increasing the amount of muck transported in a single operation. This solves the problems of existing technologies that use the elastic deformation of the belt for turning, which easily leads to wrinkles on the belt, resulting in material leakage, and the limited weight-bearing capacity of the belt and the limited amount of muck transported in a single operation.

[0009] Furthermore, the curved tunnel excavation and muck removal system also includes a front fixed bracket for fixing on the front shield and a rear fixed bracket for fixing on the support shield. The front frame is hinged to the front fixed bracket, and the rear frame is hinged to the rear fixed bracket.

[0010] The beneficial effect of the above technical solution is that it facilitates the installation of the front and rear frames.

[0011] Furthermore, the front fixed bracket includes a front support leg for connecting to the front shield and a front top support disposed at the top of the front support leg. The front top support is used to support the front frame, and the front top support is provided with a hinge structure for hinged engagement with the front frame.

[0012] The beneficial effect of the above technical solution is that it provides a larger support surface for the front frame, thus making it easier to withstand larger torques.

[0013] Furthermore, at least two front outriggers are provided, and the same front support is fixedly installed on each front outrigger.

[0014] The advantages of the above technical solution are: multiple outriggers facilitate the distribution of torque and make it easier to withstand larger torques; and the connection of multiple front outriggers to the same front support makes it easier to further increase the area of ​​the front support and avoid deformation of the support.

[0015] Furthermore, the rear fixed bracket includes a rear support leg for connecting to the support shield and a rear top support disposed at the top of the rear support leg. The rear top support is used to support the rear frame and is provided with a hinge structure for hinged engagement with the rear frame.

[0016] The beneficial effect of the above technical solution is that it provides a larger support surface for the rear frame, thus making it easier to withstand larger torques.

[0017] Furthermore, the rear support legs are provided with at least two sets, and each set of support legs is provided with a rear support, one of which is hinged to the rear frame.

[0018] The beneficial effect of the above technical solution is that the multiple rear support legs and rear top braces facilitate better support for the rear frame.

[0019] Furthermore, a first roller is provided at the front end of the front frame, a second roller is provided at the rear end of the rear frame, and a third roller and a fourth roller are provided between the first roller and the second roller. The third roller is located on the front side below the fourth roller. The conveyor belt passes around the first roller, the second roller, the third roller and the fourth roller in sequence to form a closed loop. The curved tunnel excavation and muck removal system also includes roller frames for installing the third roller and the fourth roller respectively. The roller frame of the third roller is used to connect directly or indirectly to the support shield, and the roller frame of the fourth roller is used to connect directly or indirectly to the front shield.

[0020] The beneficial effects of the above technical solution are as follows: During the tunneling process of the front shield and the support shield, their distance will change. Since the conveyor belt forms a closed loop, the total length of the conveyor belt remains unchanged. The roller frame of the third roller is used to connect directly or indirectly with the support shield, so the third roller moves synchronously with the second roller. The roller frame of the fourth roller is used to connect directly or indirectly with the front shield, so the fourth roller moves synchronously with the first roller. When the relative distance between the front shield and the support shield increases, the distance between the first roller and the second roller increases, while the distance between the third roller and the fourth roller decreases, so that the total length of the loop-shaped conveyor belt remains unchanged, playing an adaptive adjustment role.

[0021] Furthermore, both the third and fourth rollers are disposed within the support shield, and the roller frame of the fourth roller is used to extend from the front shield to the support shield.

[0022] The beneficial effects of the above technical solution are as follows: the support shield is to be used for slag discharge, and setting both the third and fourth rollers inside the support shield makes it easier to set the third roller in front of the fourth roller.

[0023] Furthermore, the roller frame of the fourth roller is integrally formed with the front frame.

[0024] The beneficial effect of the above technical solution is that it facilitates the synchronous movement of the fourth roller and the first roller.

[0025] Furthermore, the roller frame of the third roller is separately disposed from the rear frame, and the roller frame of the third roller is used to be fixedly mounted on the support shield.

[0026] The beneficial effect of the above technical solution is that it facilitates the synchronous movement between the second roller, the third roller and the support shield.

[0027] Furthermore, a reversing roller is provided on the roller frame of the third roller at the rear side of the third roller, and the conveyor belt passes through the second roller, the reversing roller and the third roller in sequence.

[0028] The advantages of the above technical solution are: it facilitates the reversal of the conveyor belt and avoids interference between the conveyor belt and the central frame.

[0029] To achieve the above objectives, the tunneling machine in this invention adopts the following technical solution:

[0030] A tunneling machine includes a front shield, a support shield, and a muck removal system. The muck removal system includes a frame and a conveyor belt located on the frame. The frame includes a front frame for hinged connection with the front shield of the tunneling machine and a rear frame for hinged connection with the support shield of the tunneling machine. Both the front and rear frames are rigid frames and their hinge axes extend vertically.

[0031] The beneficial effects of the above technical solution are as follows: This invention improves upon existing tunneling machines. During the excavation of curved tunnels, the cutterhead and front shield bend along with the tunnel. When a curve occurs, the front shield and support shield are in different positions, resulting in a certain angle. Since the frame is hinged to the front shield and support shield respectively, the frame will also present a certain angle with the front shield and support shield respectively. When the conveyor belt starts to bear force, it will be stressed at the hinge point, causing rotation, thereby keeping the conveyor belt straight. Furthermore, since both the front and rear frames are rigid, they can withstand greater weight, facilitating an increase in the amount of excavated soil transported in a single operation. This solves the problems of existing technologies that use the elastic deformation of the belt for turning, which easily leads to wrinkles on the belt causing leakage, and the limited weight-bearing capacity of the belt and the limited amount of excavated soil transported in a single operation.

[0032] Furthermore, the curved tunnel excavation and muck removal system also includes a front fixed bracket for fixing on the front shield and a rear fixed bracket for fixing on the support shield. The front frame is hinged to the front fixed bracket, and the rear frame is hinged to the rear fixed bracket.

[0033] The beneficial effect of the above technical solution is that it facilitates the installation of the front and rear frames.

[0034] Furthermore, the front fixed bracket includes a front support leg for connecting to the front shield and a front top support disposed at the top of the front support leg. The front top support is used to support the front frame, and the front top support is provided with a hinge structure for hinged engagement with the front frame.

[0035] The beneficial effect of the above technical solution is that it provides a larger support surface for the front frame, thus making it easier to withstand larger torques.

[0036] Furthermore, at least two front outriggers are provided, and the same front support is fixedly installed on each front outrigger.

[0037] The advantages of the above technical solution are: multiple outriggers facilitate the distribution of torque and make it easier to withstand larger torques; and the connection of multiple front outriggers to the same front support makes it easier to further increase the area of ​​the front support and avoid deformation of the support.

[0038] Furthermore, the rear fixed bracket includes a rear support leg for connecting to the support shield and a rear top support disposed at the top of the rear support leg. The rear top support is used to support the rear frame and is provided with a hinge structure for hinged engagement with the rear frame.

[0039] The beneficial effect of the above technical solution is that it provides a larger support surface for the rear frame, thus making it easier to withstand larger torques.

[0040] Furthermore, the rear support legs are provided with at least two sets, and each set of support legs is provided with a rear support, one of which is hinged to the rear frame.

[0041] The beneficial effect of the above technical solution is that the multiple rear support legs and rear top braces facilitate better support for the rear frame.

[0042] Furthermore, a first roller is provided at the front end of the front frame, a second roller is provided at the rear end of the rear frame, and a third roller and a fourth roller are provided between the first roller and the second roller. The third roller is located on the front side below the fourth roller. The conveyor belt passes around the first roller, the second roller, the third roller and the fourth roller in sequence to form a closed loop. The curved tunnel excavation and muck removal system also includes roller frames for installing the third roller and the fourth roller respectively. The roller frame of the third roller is used to connect directly or indirectly to the support shield, and the roller frame of the fourth roller is used to connect directly or indirectly to the front shield.

[0043] The beneficial effects of the above technical solution are as follows: During the tunneling process of the front shield and the support shield, their distance will change. Since the conveyor belt forms a closed loop, the total length of the conveyor belt remains unchanged. The roller frame of the third roller is used to connect directly or indirectly with the support shield, so the third roller moves synchronously with the second roller. The roller frame of the fourth roller is used to connect directly or indirectly with the front shield, so the fourth roller moves synchronously with the first roller. When the relative distance between the front shield and the support shield increases, the distance between the first roller and the second roller increases, while the distance between the third roller and the fourth roller decreases, so that the total length of the loop-shaped conveyor belt remains unchanged, playing an adaptive adjustment role.

[0044] Furthermore, both the third and fourth rollers are disposed within the support shield, and the roller frame of the fourth roller is used to extend from the front shield to the support shield.

[0045] The beneficial effects of the above technical solution are as follows: the support shield is to be used for slag discharge, and setting both the third and fourth rollers inside the support shield makes it easier to set the third roller in front of the fourth roller.

[0046] Furthermore, the roller frame of the fourth roller is integrally formed with the front frame.

[0047] The beneficial effect of the above technical solution is that it facilitates the synchronous movement of the fourth roller and the first roller.

[0048] Furthermore, the roller frame of the third roller is separately disposed from the rear frame, and the roller frame of the third roller is used to be fixedly mounted on the support shield.

[0049] The beneficial effect of the above technical solution is that it facilitates the synchronous movement between the second roller, the third roller and the support shield.

[0050] Furthermore, a reversing roller is provided on the roller frame of the third roller at the rear side of the third roller, and the conveyor belt passes through the second roller, the reversing roller and the third roller in sequence.

[0051] The advantages of the above technical solution are: it facilitates the reversal of the conveyor belt and avoids interference between the conveyor belt and the central frame. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the tunneling machine in this invention;

[0053] Figure 2 This is a schematic diagram of the main conveyor belt of the tunneling machine in Embodiment 1 of the present invention;

[0054] Figure 3 This is a schematic diagram of the front frame and front fixed support of the tunneling machine in Embodiment 1 of the present invention;

[0055] Figure 4 In this invention Figure 3 AA view;

[0056] Figure 5 This is a schematic diagram of the middle frame of Embodiment 1 of the tunneling machine in this invention;

[0057] Figure 6 This is a schematic diagram of the rear frame and rear fixed support of the tunneling machine in Embodiment 1 of the present invention.

[0058] In the diagram: 11. Cutter head; 12. Front shield; 13. Support shield; 14. Main conveyor belt; 21. Front frame; 22. First roller; 23. Fourth roller; 24. Roller cover; 31. Front support leg; 32. Front top support; 33. Front hinge structure; 41. Middle support leg; 42. Middle top support; 43. Third roller; 44. Reversing roller; 51. Rear frame; 52. Second roller; 61. Rear support leg; 62. Rear top support; 63. Rear hinge structure. Detailed Implementation

[0059] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0060] In Embodiment 1 of the tunneling machine of this invention:

[0061] In this embodiment, the tunneling machine includes a front shield, a rear shield, and a muck removal system. The muck removal system includes a main conveyor belt and a support frame that provides fixed support for the main conveyor belt. The main conveyor belt includes a frame and a conveyor belt located on the frame. The frame includes a front frame for hinged connection with the front shield of the tunneling machine and a rear frame for hinged connection with the rear shield of the tunneling machine. When the tunnel being excavated has an angle, the front shield and the support shield will have a certain angle. Since the front frame and the rear frame are hinged to the front shield and the support shield respectively, the front frame and the rear frame can rotate to adapt to the front shield and the support shield, so that the front shield, the conveyor belt, and the support shield form a three-section structure, thereby ensuring that the conveyor belt still runs in a straight line.

[0062] Specifically, such as Figure 1 and Figure 2 As shown, the tunneling machine includes a cutterhead 11, a front shield 12, a support shield 13, and a muck removal system. The muck removal system includes a main conveyor belt 14 and a support frame that provides fixed support for the main conveyor belt 14. The main conveyor belt 14 includes a frame and a conveyor belt located on the frame. The frame includes a front frame 21 for hinged connection with the front shield 12 of the tunneling machine and a rear frame 51 for hinged connection with the rear shield of the tunneling machine. The conveyor belt circulates back and forth between the front frame 21 and the middle frame, thus forming a complete closed loop. To facilitate the installation of the frame, a support structure is also provided to support the frame. Specifically, the support structure includes a front fixed bracket for fixed installation on the front shield 12, a rear fixed bracket for fixed installation on the support shield 13, and a middle frame fixed on the support shield 13 and located between the front frame 21 and the rear frame 51.

[0063] like Figure 3 and Figure 4As shown, the front fixed support includes front support legs 31 for connection to the front shield 12 and a front support 32 located at the top of the front support legs 31. Two sets of front support legs 31 are provided, each set including two symmetrically arranged sub-legs. The front support 32 is fixedly connected to each set of front support legs 31 to provide a large support area. The front support 32 supports the front frame 21 and has a hinge structure for hinged engagement with the frame. The front support 32 is hinged to the front frame 21 via the front hinge structure 33, and also provides support for the front frame 21. When the front frame 21 rotates relative to the front support 32, a hinge point is formed at the front hinge structure 33, and the remaining parts are supported through a sliding engagement. To improve support strength, a diagonal brace is provided on the front support leg 31 at the hinge point, with the two ends of the diagonal brace connected to the front top support 32 and the front support leg 31, respectively.

[0064] like Figure 6 As shown, the rear fixed support includes rear legs 61 for connection to the support shield 13 and rear top supports 62 at the top of the rear legs 61. Two sets of rear legs 61 are provided, each set including two sub-legs symmetrically arranged to the left and right. There are also two rear top supports 62, and each rear leg 61 is correspondingly arranged. The rear top supports 62 support the rear frame 51. One of the rear top supports 62 is provided with a rear hinge structure 63 for hinged engagement with the frame. The rear top supports 62 are hinged to the rear frame 51 via the rear hinge structure 63, and also provide support for the rear frame 51. When the rear frame 51 rotates relative to the rear top supports 62, the hinge structure becomes the hinge point, and the remaining rear top supports 62 provide support through sliding engagement. To better support the frame, the hinged structure and the outriggers are aligned on the same straight line, thus allowing the outriggers to provide better support for the hinged structure.

[0065] The conveyor belt needs to transport excavated soil on the frame, so rollers and drums are installed on the frame. Specifically, a first drum 22 is installed at the front end of the front frame 21, and a second drum 52 is installed at the rear end of the rear frame 51, thus making the conveyor belt form a closed loop. Simultaneously, during tunneling, the tunneling machine advances, and the distance between the front shield 12 and the support shield 13 changes. Since the first drum 22 is fixedly connected to the front shield 12, and the second drum 52 is fixedly connected to the support shield 13, the first drum 22 and the second drum 52 will also undergo relative displacement, causing a change in the length of the conveyor belt between them. To accommodate this change, a middle frame is also installed between the front frame 21 and the rear frame 51, fixedly mounted on the support shield 13. A third drum 43 is installed on the middle frame, which also constitutes the drum frame for the third drum. A fourth drum 23 is installed between the third drum 43 and the second drum 52, with the third drum 43 located below the fourth drum 23. Figure 5 As shown, the central frame includes four central support legs 41 arranged sequentially from front to back and a central top support 42 located at the top of the support legs. The third roller 43 is fixedly mounted on the central top support 42.

[0066] The central frame is fixedly mounted on the support shield 13, therefore the fourth roller 23 is also located within the support shield 13. A reversing roller 44 is mounted on the roller frame of the third roller 43 at the rear side. The conveyor belt sequentially passes through the first roller 22, the second roller 52, the reversing roller 44, the third roller 43, and the fourth roller 23 to form a closed loop. The front frame 21 is fixedly mounted on the front shield 12 and extends from the front shield 12 to the support shield 13. The fourth roller 23 is fixedly mounted at the rear end of the front frame 21. In this case, the front frame 21 also constitutes the roller frame supporting the fourth roller 23, which is indirectly connected to the front shield 12. It is worth noting that to prevent damage to the rollers from slag or gravel, a roller guard 24 is provided on the first roller 22. Alternatively, a roller guard can also be provided above the second roller 52.

[0067] When the tunnel boring machine (TBM) is excavating inside a tunnel and enters a curved tunnel, the front shield 12 and the support shield 13 are arranged in a front-to-back configuration, resulting in a certain angle within the curved tunnel. The front frame 21 and the rear frame 51, hinged to the TBM, allow the frame to rotate relative to the TBM. This rotation of the frame relieves the conveyor belt of stress. Furthermore, since the conveyor belt on the frame is in a taut state, it exerts a torque perpendicular to the drum. If the conveyor belt is subjected to stress, it will transmit this torque to the frame, causing the frame to rotate.

[0068] If the front shield 12 moves forward relative to the supporting shield 13, the distance between the conveyor belts between the front frame 21 and the rear frame 51 increases. However, due to the presence of the third roller 43 and the fourth roller 23, and the fact that the fourth roller 23 is connected to the front frame 21 and the third roller 43 is connected to the rear frame 51, the distance between the third roller 43 and the fourth roller 23 will decrease. This will release a certain length of the conveyor belt, keeping it taut and allowing the excavated soil flowing out from the driven roller to be transported at a fixed point, thus preventing the conveyor belt from extending too far beyond the rear hinge point.

[0069] In Embodiment 2 of the tunneling machine of the present invention: Regarding the arrangement of the drum frame of the third drum, this embodiment proposes a new arrangement. Unlike Embodiment 1, the middle frame in this embodiment no longer includes a reversing drum, and the second drum is directly connected to the third drum via a conveyor belt.

[0070] In Embodiment 3 of the tunneling machine of this invention: Regarding the arrangement of the third drum's drum frame, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the drum frame of the third drum is integrally formed with the rear frame, allowing the third drum and the second drum to move synchronously. Of course, the third drum and the fourth drum can both be located within the support shield, or the third drum can be located within the front shield and the fourth drum within the support shield; alternatively, both the third drum and the fourth drum can be located within the front shield.

[0071] In Embodiment 4 of the tunneling machine of the present invention: Regarding the setting of the drum frame of the fourth drum, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, both the third drum and the fourth drum are located inside the front shield. The fourth drum is set on the front shield by a separately set drum frame. The drum frame of the third drum is fixedly connected to the rear frame. At this time, the drum frame of the third drum is indirectly connected to the rear frame.

[0072] In Embodiment 5 of the tunneling machine of this invention: Regarding the arrangement of the rear fixed support, this embodiment proposes a new arrangement. Unlike Embodiment 1, this embodiment has three sets of rear outriggers. Of course, in other embodiments, the rear outriggers may also have four sets or other numbers greater than two sets.

[0073] In Embodiment 6 of the tunneling machine of the present invention: Regarding the setting of the rear fixed support, this embodiment proposes a new arrangement. Unlike Embodiment 1, this embodiment has only one rear support, and the rear support is fixedly connected to the top of each set of rear outriggers.

[0074] In embodiment 7 of the tunneling machine of the present invention: Regarding the setting of the rear fixed support, this embodiment proposes a new arrangement. Unlike embodiment 1, in this embodiment, the rear fixed support no longer has a rear outrigger, the rear top support is directly fixedly connected to the support shield, and the rear frame is hinged on the rear top support.

[0075] In Embodiment 8 of the tunneling machine of this invention: Regarding the arrangement of the front fixed support, this embodiment proposes a new arrangement. Unlike Embodiment 1, this embodiment has three sets of front outriggers. Of course, in other embodiments, the front outriggers may also have four sets or other numbers greater than two sets.

[0076] In embodiment 9 of the tunneling machine of the present invention: Regarding the setting of the front fixed support, this embodiment proposes a new arrangement. Unlike embodiment 1, this embodiment has multiple front supports, and the front supports are set one-to-one with the front outriggers. One of the front supports is hinged to the front frame.

[0077] In Embodiment 10 of the tunneling machine in this invention: Regarding the setting of the front fixed support, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the front fixed support no longer has front outriggers, the front top support is directly fixedly connected to the front shield, and the front frame is hinged on the front top support.

[0078] In Embodiment 11 of the tunneling machine in this invention: Regarding the setting of the slag removal system, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the front frame of the slag removal system is directly hinged to the front shield, and the rear frame support is hinged to the support shield. At this time, the front fixed support and the rear fixed support are no longer set.

[0079] In the embodiment of the curved tunnel excavation muck removal system of the present invention, the curved tunnel excavation muck removal system in this embodiment is the same as the muck removal system in any embodiment of the tunneling machine described above, and will not be repeated here.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A curved tunnel excavation muck removal system, comprising a main conveyor belt, the main conveyor belt including a frame and a conveyor belt located on the frame, characterized in that: The frame structure includes a front frame and a rear frame, both of which are rigid. The curved tunnel excavation and muck removal system also includes a front fixing bracket for fixing to the front shield and a rear fixing bracket for fixing to the support shield. The front fixing bracket includes a front top support for supporting the front frame, which is hinged to the front frame via a front hinge structure with the hinge axis extending vertically. The rear fixing bracket includes a rear top support for supporting the rear frame, which is hinged to the rear frame via a rear hinge structure with the hinge axis extending vertically. When entering a curved tunnel, the front shield and the support shield will form a certain angle, and the front frame can be relatively... The front support rotates, and the rear frame can rotate relative to the rear support to adapt to the front shield and the support shield, so that the front shield, the conveyor belt and the support shield form a three-section structure, thus ensuring that the conveyor belt still runs in a straight line. The front end of the front frame is equipped with a first roller, and the rear end of the rear frame is equipped with a second roller. A third roller and a fourth roller are located between the first roller and the second roller. The third roller is located on the front side below the fourth roller. The roller frame of the third roller is used to connect with the support shield, and the roller frame of the fourth roller is used to connect with the front shield. The conveyor belt passes around the first roller, the second roller, the third roller and the fourth roller in sequence to form a closed loop.

2. The curved tunnel excavation and muck removal system according to claim 1, characterized in that: The front support is directly fixedly connected to the front shield, and the rear support is directly fixedly connected to the support shield.

3. The curved tunnel excavation and muck removal system according to claim 1, characterized in that: The front fixed bracket also includes a front support leg for connecting to the front shield, and a front top support is located at the top of the front support leg.

4. The curved tunnel excavation and muck removal system according to claim 3, characterized in that: The front outriggers are provided in at least two sets, and each set of front outriggers is fixedly provided with the same front support.

5. The curved tunnel excavation and muck removal system according to claim 3 or 4, characterized in that: The rear fixing bracket also includes a rear support leg for connecting to the support shield, and a rear top support is located at the top of the rear support leg.

6. The curved tunnel excavation and muck removal system according to claim 5, characterized in that: The rear outriggers are provided in at least two sets, and each set of outriggers is provided with a rear support, one of which is hinged to the rear frame.

7. The curved tunnel excavation and muck removal system according to any one of claims 1-4, characterized in that... The roller frame of the third roller is integrated with the rear frame.

8. The curved tunnel excavation and muck removal system according to any one of claims 1-4, characterized in that: Both the third and fourth rollers are located inside the support shield, and the roller frame of the fourth roller is used to extend from the front shield to the support shield.

9. The curved tunnel excavation and muck removal system according to claim 8, characterized in that: The roller frame of the fourth roller is integrally formed with the front frame.

10. The curved tunnel excavation and muck removal system according to claim 8, characterized in that: The roller frame of the third roller is separately set from the rear frame, and the roller frame of the third roller is used to fix it on the support shield.

11. The curved tunnel excavation and muck removal system according to claim 10, characterized in that: A reversing roller is installed on the roller frame of the third roller behind the third roller, and the conveyor belt passes through the second roller, the reversing roller and the third roller in sequence.

12. A tunneling machine, comprising a front shield, a support shield, and a muck removal system, wherein the muck removal system includes a main conveyor belt, the main conveyor belt comprising a frame and a conveyor belt located on the frame, characterized in that: The frame structure includes a front frame and a rear frame, both of which are rigid. The muck removal system also includes a front fixing bracket for fixing to the front shield and a rear fixing bracket for fixing to the support shield. The front fixing bracket includes a front top support for supporting the front frame, which is hinged to the front frame via a front hinge structure with the hinge axis extending vertically. The rear fixing bracket includes a rear top support for supporting the rear frame, which is hinged to the rear frame via a rear hinge structure with the hinge axis extending vertically. When entering a curved tunnel, the front shield and the support shield will form a certain angle, and the front frame can be positioned relative to the front... The top support rotates, and the rear frame can rotate relative to the rear top support to adapt to the front shield and the support shield, so that the front shield, the conveyor belt and the support shield form a three-section structure, thus ensuring that the conveyor belt still runs in a straight line; the front end of the front frame is equipped with a first roller, the rear end of the rear frame is equipped with a second roller, and a third roller and a fourth roller are provided between the first roller and the second roller. The third roller is located on the front side below the fourth roller. The roller frame of the third roller is used to connect with the support shield, and the roller frame of the fourth roller is used to connect with the front shield. The conveyor belt passes around the first roller, the second roller, the third roller and the fourth roller in sequence to form a closed loop.

13. The tunneling machine according to claim 12, characterized in that: The front support is directly fixedly connected to the front shield, and the rear support is directly fixedly connected to the support shield.

14. The tunneling machine according to claim 12, characterized in that: The front fixed bracket also includes a front support leg for connecting to the front shield, and a front top support is located at the top of the front support leg.

15. The tunneling machine according to claim 14, characterized in that: The front outriggers are provided in at least two sets, and each set of front outriggers is fixedly provided with the same front support.

16. The tunneling machine according to claim 14 or 15, characterized in that: The rear fixing bracket also includes a rear support leg for connecting to the support shield, and a rear top support is located at the top of the rear support leg.

17. The tunneling machine according to claim 16, characterized in that: The rear outriggers are provided in at least two sets, and each set of outriggers is provided with a rear support, one of which is hinged to the rear frame.

18. The tunneling machine according to any one of claims 12-15, characterized in that: The roller frame of the third roller is integrated with the rear frame.

19. The tunneling machine according to any one of claims 12-15, characterized in that: Both the third and fourth rollers are located inside the support shield, and the roller frame of the fourth roller is used to extend from the front shield to the support shield.

20. The tunneling machine according to claim 19, characterized in that: The roller frame of the fourth roller is integrally formed with the front frame.

21. The tunneling machine according to claim 19, characterized in that: The roller frame of the third roller is separately set from the rear frame, and the roller frame of the third roller is used to fix it on the support shield.

22. The tunneling machine according to claim 21, characterized in that: A reversing roller is installed on the roller frame of the third roller behind the third roller, and the conveyor belt passes through the second roller, the reversing roller and the third roller in sequence.

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