Heading machine with crushing device

Abstract

The invention relates to the technical field of shield tunneling machines, in particular to a tunneling machine with a crushing device.The crushing device comprises a feeding bin box, a crushing box, a first crushing tooth roller, a second crushing tooth roller, a driven crushing mechanism, a first driving part and a second driving part; the feeding cabin box body is fixed on the crushing box body, and the interior of the feeding cabin box body is communicated with the interior of the crushing box body; the first crushing tooth roller and the second crushing tooth roller are rotatably mounted in the crushing box body at an interval, the first crushing tooth roller extends out of the crushing box body and is connected with the first driving part, and the second crushing tooth roller extends out of the crushing box body and is connected with the second driving part; and the driven crushing mechanism is movably mounted in the crushing box body, and a channel for crushing stones is formed between the driven crushing mechanism and the first crushing tooth roller and between the driven crushing mechanism and the second crushing tooth roller. The secondary crushing device solves the technical problems that a secondary crushing device in the prior art is small in crushing ratio and large in particle size after crushing.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine technology, and more specifically to a tunneling machine with a crushing device. Background Technology

[0002] The crushing unit is a crucial component of a tunnel boring machine (TBM). It performs secondary crushing of large chunks of rock cut by the cutterhead, allowing the rock to be transported out through the circulation system pipeline. Existing secondary crushing units used in the mud pipeline of TBMs include belt-driven jaw crushers, which offer high crushing efficiency but suffer from significant vibration and are prone to clogging. Single-roll crushers are also available, but their capacity is low and maintenance is inconvenient. Double-roll crushers offer a moderate crushing ratio and capacity. However, when dealing with sandy and cobblestone formations containing large-diameter boulders, traditional secondary crushing units face challenges such as a small crushing ratio and large post-crushing particle size. Summary of the Invention

[0003] The purpose of this invention is to provide a tunneling machine with a crushing device to solve the technical problems of small crushing ratio and large particle size after crushing in existing secondary crushing devices. The specific technical solution is as follows: This invention provides a tunneling machine with a crushing device, including a crushing device connected to the circulation system pipeline of the tunneling machine. The crushing device includes a feed hopper, a crushing chamber, a first crushing toothed roller, a second crushing toothed roller, a passive crushing mechanism, a first drive member, and a second drive member. The feed hopper is fixed to the crushing chamber, and the interior of the feed hopper is connected to the interior of the crushing chamber. The first and second crushing toothed rollers are rotatably mounted in the crushing chamber at intervals, with the first crushing toothed roller extending out of the crushing chamber and connected to the first drive member, and the second crushing toothed roller extending out of the crushing chamber and connected to the second drive member. The passive crushing mechanism is movably mounted in the crushing chamber, and a channel for crushing rocks is formed between the passive crushing mechanism and the first and second crushing toothed rollers, with the channel gap adjustable to adapt to different geological formations.

[0004] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that the passive crushing mechanism includes a rotating frame, a toothed plate, and a telescopic assembly. The telescopic assembly is mounted on the side wall of the crushing box, the upper end of the rotating frame is hinged to the side wall of the crushing box, the back of the rotating frame is hinged to the telescopic assembly, and the toothed plate is detachably mounted on the front of the rotating frame.

[0005] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that the telescopic assembly includes a push rod, a jacking bolt, and a cover plate. The push rod is hinged to the rotating frame, and an adjustment hole is provided on the side wall of the crushing box. The cover plate is detachably installed on the crushing box and seals the adjustment hole. The jacking bolt is connected between the cover plate and the push rod.

[0006] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that the first crushing toothed roller includes a first drive shaft and a plurality of three-tooth crushing cutters, the plurality of three-tooth crushing cutters being mounted on the first drive shaft with staggered teeth, and the first drive shaft being connected to the first drive member.

[0007] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that the first drive shaft is mounted on the crushing box via a first main sealing ring, a wear-resistant ring is fitted on the first drive shaft and on the side of the three-tooth crushing cutter, a first sealing pressure plate is provided between the wear-resistant ring and the first main sealing ring, and a mudguard ring is fitted on the outer periphery of the wear-resistant ring.

[0008] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that the first drive shaft is fitted with a second main sealing ring, the second main sealing ring is connected to the outer end face of the first main sealing ring, a self-aligning bearing is installed on the outer periphery of the first drive shaft and located on the outer end face of the second main sealing ring, a bearing seat is fitted on the outer periphery of the self-aligning bearing, and the bearing seat is connected to the second main sealing ring, and a bearing end cap one or a bearing end cap two for sealing the self-aligning bearing is fixed on the bearing seat.

[0009] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that a sealing structure is provided between the first main sealing ring, the second main sealing ring and the first drive shaft.

[0010] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that the second crushing toothed roller includes a second drive shaft and a plurality of six-tooth crushing cutters, the plurality of six-tooth crushing cutters being staggeredly mounted on the second drive shaft, and the second drive shaft being connected to the second drive member.

[0011] A further improvement of the present invention, which is a tunneling machine with a crushing device, is that the top of the feed chamber is provided with a feed inlet cover plate and the side of the feed chamber is provided with a slurry outlet flange.

[0012] The present invention also provides a tunneling machine, including a tunneling machine with a crushing device as described above, wherein the tunneling machine with the crushing device is connected to the circulation system pipeline of the tunneling machine.

[0013] The application of the technical solution of the present invention has the following beneficial effects: The present invention relates to a tunneling machine with a crushing device. The first crushing toothed roller of the crushing device moves relative to the passive crushing mechanism to crush large rocks and mud clumps cut by the cutter head. The second crushing toothed roller moves relative to the passive crushing mechanism to crush the large rocks and mud clumps again. The product after secondary crushing has a smaller particle size. At the same time, the crushing ratio of the crushing device is increased and it has a high pressure bearing capacity. This solves the technical problems of small crushing ratio and large particle size after crushing in the prior art of secondary crushing devices. The first and second crushing toothed rollers of this invention, in conjunction with the passive crushing mechanism, primarily employ shearing and breaking crushing, supplemented by compression crushing, resulting in more labor-saving and energy-efficient crushing. The toothed roller structure of the first and second crushing toothed rollers minimizes crushing vibration, effectively improving the stability of the tunneling machine's control system. The primary crushing mainly breaks large rocks, while the secondary crushing mainly breaks small rocks, controlling the particle size after crushing. Furthermore, the gaps between the passive crushing mechanism and the first and second crushing toothed rollers, as well as the gaps between the passive crushing mechanism and the second crushing toothed rollers, can be adjusted via telescopic components to adapt to different geological formations and meet the requirements of the circulation system. This satisfies the particle size requirements of the mud pumps within the tunnel, improving the adaptability of the slurry balance shield machine in water-rich sandy and gravelly strata, solving the problem of sludge retention, and increasing tunneling efficiency.

[0014] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a side view of the tunneling machine with a crushing device according to the present invention; Figure 2 yes Figure 1 AA-line sectional view; Figure 3 yes Figure 2 BB line section view; Figure 4 This is a diagram showing the operational status of the tunneling machine with a crushing device according to the present invention.

[0016] The components include: 1. Crushing chamber; 2. Feed chamber; 3. Feed inlet cover; 4. Slurry outlet flange; 5. First inspection door; 6. Second inspection door; 7. Coupling; 8. Motor support; 9. Hydraulic motor; 10. Slurry discharge flange; 11. Flushing port flange; 12. First sealing strip; 13. First rotating shaft; 14. Toothed plate; 15. Rotating frame; 16. Three-tooth crushing cutter; 17. Second sealing strip; 18. Six-tooth crushing cutter; 19. Second rotating shaft; 20. Connecting plate; 21. Third sealing strip; 22. Third inspection door; 23. Third rotating shaft; 24. Push rod; 5. Cover plate; 26. Sealing cover plate; 27. Fourth sealing strip; 28. Fifth sealing strip; 29. ​​Gasket; 30. Locking washer; 31. Self-aligning bearing; 32. Bearing housing; 33. Second main sealing ring; 34. Combined seal; 35. Wear-resistant sleeve; 36. Wear-resistant ring; 37. First drive shaft; 38. Mudguard ring; 39. First sealing ring; 40. Second sealing ring; 41. First main sealing ring; 42. Third sealing ring; 43. Fourth sealing ring; 44. Second sealing pressure plate; 45. First bearing end cover; 46. Locking nut; 47. First sealing pressure plate; 48. Second bearing end cover. Detailed Implementation

[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] See also Figures 1-4 As shown, a tunneling machine with a crushing device includes a crushing device connected to the circulation system pipeline of the tunneling machine. The crushing device includes a feed hopper 2, a crushing chamber 1, a first crushing toothed roller, a second crushing toothed roller, a passive crushing mechanism, a first drive member, and a second drive member. The feed hopper 2 is fixed to the crushing chamber 1, and the interior of the feed hopper 2 is connected to the interior of the crushing chamber 1. The first crushing toothed roller and the second crushing toothed roller are rotatably installed in the crushing chamber 1 at intervals, and the first crushing toothed roller extends out of the crushing chamber 1 and is connected to the first drive member, and the second crushing toothed roller extends out of the crushing chamber 1 and is connected to the second drive member. The passive crushing mechanism is movably installed in the crushing chamber 1, and a channel for crushing rocks is formed between the passive crushing mechanism and the first and second crushing toothed rollers, and the channel gap is adjustable to adapt to different strata.

[0019] The size of the gap between the cutter on the first crushing toothed roller and the toothed plate 14 determines the maximum feed particle size of the crushing mechanism; the size of the gap between the cutter on the second crushing toothed roller and the toothed plate 14 determines the particle size after crushing. Under the same gap conditions in different strata, the particle size after crushing will be different, which needs to be adjusted by the telescopic component; at the same time, the secondary crushing feed particle size of the second crushing toothed roller must be greater than the discharge particle size of the first crushing toothed roller.

[0020] The rotational speeds of the first and second crushing rollers are independently adjustable. Typically, the crushing capacity of the first crushing roller is determined by taking 1.1 times the capacity of the stratum with respect to the particle size larger than that after crushing by the first crushing roller, and the maximum design advance speed of the tunneling machine. Similarly, the rotational speed of the second crushing roller is typically determined by taking 1.1 times the capacity of the stratum with respect to the particle size larger than that after crushing by the second crushing roller, and the maximum design advance speed of the tunneling machine.

[0021] Specifically, the crushing chamber 1 is fixed to the pad 29 with screws, and the crushing device is welded to the rear supporting trolley through the pad 29. At the bottom of the crushing chamber 1, there is a slurry discharge port flange 10 and a flushing port flange 11. The flushing port flange 11 is connected to flushing water, which can flush the crushing chamber 1 and accelerate the slag discharge; the slurry discharge port flange 10 is connected to the slurry discharge pipe to realize the slag discharge function.

[0022] Preferred, such as Figure 2 As shown, the passive crushing mechanism includes a rotating frame 15, a toothed plate 14, and a telescopic assembly. The telescopic assembly is mounted on the side wall of the crushing chamber 1. The upper end of the rotating frame 15 is hinged to the side wall of the crushing chamber 1, and the back of the rotating frame 15 is hinged to the telescopic assembly. The toothed plate 14 is detachably mounted on the front of the rotating frame 15. Specifically, the toothed plate 14 is fixed to the rotating frame 15 with screws for easy replacement and maintenance, and mainly serves a passive crushing function.

[0023] Preferably, the telescopic assembly includes a push rod 24, a push bolt, and a cover plate 25. The push rod 24 is hinged to the rotating frame 15. An adjustment hole is provided on the side wall of the crushing chamber 1. The cover plate 25 is detachably installed on the crushing chamber 1 and seals the adjustment hole. The push bolt connects the cover plate 25 and the push rod 24. A connecting plate is provided on the back of the rotating frame 15. The connecting plate is connected to the rotating frame 15 through a second rotating shaft 19. The connecting plate mainly transmits thrust, tension, and pressure. One end of the push rod 24 is connected to the connecting plate through a third rotating shaft 23. The other end of the push rod 24 is installed on the side wall of the crushing chamber 1, mainly transmitting thrust, tension, and pressure. The cover plate 25 is installed on the crushing chamber 1 with screws. An O-shaped fifth sealing strip 28 is installed between the mounting surface of the cover plate 25 and the mounting surface of the crushing chamber 1 to ensure a seal between the contact surfaces. The cover plate 25 is equipped with a push bolt and a tightening screw, which can adjust the gap between the toothed plate 14 and the crushing blade, thereby adjusting the crushed particle size. When it is necessary to adjust the crushed particle size, remove the screws on the sealing cover plate 26; remove the sealing cover plate 26; loosen the tightening screw of the push rod 24; then loosen the locking nut 46, and use the push bolt to push the push rod 24. The push rod 24 drives the connecting plate to push the rotating frame 15 to rotate around the first rotating shaft 13, thereby adjusting the gap between the toothed plate 14 and the six-tooth crushing blade 18, thereby adjusting the final crushed particle size. A sealing cover plate 26 is also provided on the cover plate 25. The sealing cover plate 26 is installed on the cover plate 25 by screws. An "O"-shaped fourth sealing strip 27 is installed between the mounting surface of the sealing cover plate 26 and the mounting surface of the cover plate 25 to ensure the seal between the contact surfaces. The rotating frame 15 is connected to the crushing box 1 through the first rotating shaft 13 and mainly serves as a load-bearing device. Furthermore, a hydraulic cylinder can be used to replace the push rod 24 and the connecting plate to adjust the gap between the toothed plate 14 and the crushing blade.

[0024] Preferred, such as Figure 3 As shown, the first crushing toothed roller includes a first drive shaft 37 and multiple three-tooth crushing cutters 16. The multiple three-tooth crushing cutters 16 are staggered on the first drive shaft 37, which is connected to the first drive component. The staggered installation of adjacent three-tooth crushing cutters 16 reduces the number of cutters participating in crushing simultaneously. The cutters are preferably arranged in a spiral pattern to reduce equipment load and prevent clogging. Furthermore, the first crushing toothed roller uses a single roller with large-tooth, high-profile three-tooth crushing cutters 16 and a toothed plate 14 to achieve combined crushing. The crushing method is mainly shearing and breaking crushing, supplemented by compression crushing, making crushing more labor-saving and energy-efficient, while increasing the crushing ratio of the primary crushing stage.

[0025] Preferably, the first drive shaft 37 is mounted on the crushing chamber 1 via a first main sealing ring 41. A wear-resistant ring 36 is fitted on the first drive shaft 37 and located on the side of the three-tooth crusher 16. A first sealing pressure plate 47 is provided between the wear-resistant ring 36 and the first main sealing ring 41. A mudguard ring 38 is fitted around the outer periphery of the wear-resistant ring 36. Specifically, the first sealing pressure plate 47 is mounted on the first main sealing ring 41 with screws; the first main sealing ring 41 is mounted on the crushing chamber 1 with screws, and an O-ring 40 is installed between the mounting surface of the first main sealing ring 41 and the mounting surface of the crushing chamber 1 to ensure a seal between the contact surfaces. A wear-resistant sleeve 35 is also fitted on the drive shaft, and an O-ring 39 is installed between the drive shaft and the wear-resistant sleeve 35 to ensure a seal between the contact surfaces. Wear-resistant ring 36 is fitted on the drive shaft, mainly for positioning and wear reduction; mud-blocking ring 38 is fitted on wear-resistant ring 36, mainly for positioning and preventing mud and sand from entering wear-resistant ring 36.

[0026] Preferably, the first drive shaft 37 is fitted with a second main sealing ring 33, which is connected to the outer end face of the first main sealing ring 41. A self-aligning bearing 31 is installed on the outer periphery of the first drive shaft 37 and on the outer end face of the second main sealing ring 33. A bearing seat 32 is fitted on the outer periphery of the self-aligning bearing 31 and is connected to the second main sealing ring 33. A first bearing end cap 45 or a second bearing end cap 48 for sealing the self-aligning bearing 31 is fixed on the bearing seat 32. Specifically, the second main sealing ring 33 is fixed to the first main sealing ring 41 by bolts. Two O-rings, a third sealing ring 42 and a fourth O-ring 43 are installed between the contact surfaces of the second main sealing ring 33 and the first main sealing ring 41 to ensure a seal between the contact surfaces.

[0027] A locking washer 30 is fitted on the first drive shaft 37, on the side of the self-aligning bearing 31 away from the three-tooth crusher 16. The drive end of the self-aligning bearing 31 is locked with two locking nuts 46, and the other end is locked with a locking nut 46 and the locking washer 30 to ensure that the drive shaft does not move axially. The bearing housing 32 is fixed to the second main sealing ring 33 by bolts, providing support for the bearing. The first bearing end cover 45 and the second bearing end cover 48 are fixed to the bearing housing 32 by bolts, providing a sealing function for the bearing.

[0028] Preferably, a sealing structure is provided between the first main sealing ring 41, the second main sealing ring 33, and the first drive shaft 37. The sealing structure includes a combined seal 34, which is installed between the wear-resistant sleeve 35 and the first and second main sealing rings. The combined seal 34 is pressed together by a second sealing pressure plate 44, which is fixed to the second main sealing ring 33 with screws. The combined seal 34 ensures the pressure-bearing sealing capacity of the wear-resistant sleeve 35 when the first drive shaft 37 rotates. The sealing structure also includes the aforementioned first sealing ring 39, second sealing ring 40, third sealing ring 42, and fourth sealing ring 43; their specific installation positions are not detailed here. The sealing structure ensures the sealing performance of the entire crushing device under high water pressure.

[0029] Preferably, the second crushing toothed roller includes a second drive shaft and multiple six-tooth crushing cutters 18. The multiple six-tooth crushing cutters 18 are staggered on the second drive shaft, which is connected to the second drive component. The staggered arrangement of adjacent six-tooth crushing cutters 18 reduces the number of cutters simultaneously involved in crushing. The cutters are preferably arranged in a spiral pattern to reduce equipment load and prevent clogging. The number or arrangement of the crushing cutter teeth can be changed according to actual needs. Furthermore, the second crushing toothed roller can utilize a combination of a single roller and a toothed plate 14 with six-tooth crushing cutters 18 of two different diameters to achieve combined crushing. The crushing method is mainly shearing and breaking, supplemented by compression crushing, making crushing more labor-saving and energy-efficient. Preferably, each diameter of six-tooth cutter uses two or more cutters with different starting angles. The staggered arrangement of the cutters in the second crushing toothed roller addresses the crushing of long, strip-shaped materials. Except for the cutters, the second crushing toothed roller has the same structure (drive structure, sealing mechanism, etc.) as the first crushing toothed roller.

[0030] Specifically, the first and second driving components can be either a motor with hydraulic coupling and a reducer, a hydraulic motor drive and a reducer, or a hydraulic motor. In this embodiment, the first and second driving components are hydraulic motors 9. The hydraulic motor 9 is mounted on the pad 29 via a motor support 8. The hydraulic motor 9 provides the power source and is connected to the first drive shaft 37 or the second drive shaft via a coupling 7. One end of the coupling 7 is connected to the first drive shaft 37 or the second drive shaft via an internal hexagonal joint, and the other end is connected to the hydraulic motor 9 via an internal spline. Its main functions are to transmit torque and correct deviation. Figure 4As shown, the hydraulic motor 9 for primary crushing drives the first drive shaft 37 via coupling 7, which in turn drives the three-tooth crusher 16 to rotate counterclockwise to perform secondary crushing of large rocks and mud clumps cut by the cutterhead. The hydraulic motor 9 for secondary crushing drives the second drive shaft via coupling 7, which in turn drives the six-tooth crusher 18 to rotate counterclockwise to further crush rocks, mud clumps, and rocks cut by the cutterhead, as well as rocks crushed in the primary crushing stage. This high-crushing-ratio crushing device increases the crushing ratio through primary and secondary crushing, solving the problem of large crushing ratio and large particle size after crushing when the tunneling machine faces sand and cobblestone strata containing large-diameter boulders.

[0031] Preferably, the top of the feed chamber 2 is provided with a feed inlet cover plate 3, and the side of the feed chamber 2 is provided with a slurry intake flange. Specifically, the feed chamber 2 is connected to the crushing chamber 1 by bolts, and an "O"-shaped first sealing strip 12 is installed between the mounting surfaces of the feed chamber 2 and the crushing chamber 1 to ensure a seal between the contact surfaces. The feed inlet cover plate 3 is fixed to the feed chamber 2 by bolts. When the crushing device is connected to the circulation system pipeline, the feed inlet cover plate 3 is removed, and the feed chamber 2 is connected to the circulation system pipeline. The slurry intake flange plate 4 is fixed to the feed chamber 2 by bolts. When the crushing device is connected to the circulation system pipeline, the slurry intake flange plate 4 can be removed and connected to the circulation system pipeline, that is, slurry is taken from the intake port and then pumped back to the excavation chamber of the tunneling machine to increase the local flow velocity and optimize the performance of the circulation system. The feed chamber 2 does not yet have the first maintenance door panel 5. The first maintenance door panel 5 is fixed to the feed chamber 2 with bolts to facilitate the cleaning and maintenance of the crushing device. The feed chamber 2 mainly serves to store materials and connect the pipelines in the side circulation system.

[0032] During tunneling, the feed inlet cover plate 3 is removed from the connecting hose joint, and the crushing device is connected to the screw conveyor. The screw conveyor transports mud, pebbles, and clumps into the feed chamber 2, and then into the crushing chamber 1. The first crushing toothed roller moves relative to the toothed plate 14 to crush the large rocks and clumps cut by the cutter head. The second crushing toothed roller moves relative to the toothed plate 14 to further crush the rocks, clumps, and rocks already crushed in the secondary crushing process. The particle size after the two-stage crushing meets the requirements for the mud pump and pipeline, thus preventing pipe and pump blockage.

[0033] A second maintenance door panel 6 is provided on the crushing chamber 1. An O-shaped second sealing strip 17 is installed between the second maintenance door panel 6 and the two mounting surfaces of the crushing chamber 1 to ensure a seal between the contact surfaces and facilitate the cleaning and maintenance of the crushing device. A third maintenance door panel 22 is provided on the crushing chamber 1. An O-shaped third sealing strip 21 is installed between the third maintenance door panel 22 and the two mounting surfaces of the crushing chamber 1 to ensure a seal between the contact surfaces and facilitate the cleaning and maintenance of the crushing device. When the crushing device becomes clogged or the blades wear out, the corresponding maintenance door panel can be removed for cleaning or blade replacement. The maintenance door in this invention can be replaced by a gate driven by a hydraulic cylinder.

[0034] The present invention relates to a tunneling machine with a crushing device. The first crushing toothed roller of the crushing device moves relative to the passive crushing mechanism to crush large rocks and mud clumps cut by the cutter head. The second crushing toothed roller moves relative to the passive crushing mechanism to crush the large rocks and mud clumps again. The product after secondary crushing has a smaller particle size. At the same time, the crushing ratio of the crushing device is increased and it has a high pressure bearing capacity. This solves the technical problems of small crushing ratio and large particle size after crushing in the prior art of secondary crushing devices. The first and second crushing toothed rollers of this invention, in conjunction with the passive crushing mechanism, primarily employ shearing and breaking crushing, supplemented by compression crushing, resulting in more labor-saving and energy-efficient crushing. The toothed roller structure of the first and second crushing toothed rollers minimizes crushing vibration, effectively improving the stability of the tunneling machine's control system. The primary crushing mainly breaks large rocks, while the secondary crushing mainly breaks small rocks. The particle size after crushing is controlled, and the gap between the cutter and toothed plate 14 on the second crushing toothed roller is adjusted by the telescopic component to adjust the particle size after crushing, meeting the requirements of the circulation system and satisfying the particle size requirements of the mud pump in the tunnel. This improves the adaptability of the slurry balance shield machine in water-rich sandy and gravelly strata, solves the problem of stagnant drainage, and increases tunneling efficiency.

[0035] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A tunneling machine with a crushing device, characterized in that, The crushing device includes a crushing device connected to the circulation system pipeline of a tunneling machine. The crushing device includes a feed hopper (2), a crushing box (1), a first crushing toothed roller, a second crushing toothed roller, a passive crushing mechanism, a first driving member, and a second driving member. The feed hopper (2) is fixed on the crushing box (1), and the interior of the feed hopper (2) is connected to the interior of the crushing box (1). The first crushing toothed roller and the second crushing toothed roller are rotatably installed in the crushing box (1) at intervals. The first crushing toothed roller extends out of the crushing box (1) and is connected to the first driving member. The second crushing toothed roller extends out of the crushing box (1) and is connected to the second driving member. The passive crushing mechanism is movably installed in the crushing box (1), and a channel for crushing stones with adjustable gap is formed between the passive crushing mechanism and the first crushing toothed roller and the second crushing toothed roller.

2. The tunneling machine with a crushing device according to claim 1, characterized in that, The passive crushing mechanism includes a rotating frame (15), a toothed plate (14), and a telescopic assembly. The telescopic assembly is installed on the side wall of the crushing box (1). The upper end of the rotating frame (15) is hinged to the side wall of the crushing box (1). The back of the rotating frame (15) is hinged to the telescopic assembly. The toothed plate (14) is detachably installed on the front of the rotating frame (15).

3. The tunneling machine with a crushing device according to claim 2, characterized in that, The telescopic assembly includes a push rod (24), a push bolt, and a cover plate (25). The push rod (24) is hinged to the rotating frame (15). An adjustment hole is provided on the side wall of the crushing box (1). The cover plate (25) is detachably installed on the crushing box (1) and seals the adjustment hole. The push bolt is connected between the cover plate (25) and the push rod (24).

4. The tunneling machine with a crushing device according to claim 1, characterized in that, The first crushing toothed roller includes a first drive shaft (37) and a plurality of three-tooth crushing cutters (16), the plurality of three-tooth crushing cutters (16) being mounted on the first drive shaft (37) with staggered teeth, and the first drive shaft (37) being connected to the first drive member.

5. The tunneling machine with a crushing device according to claim 4, characterized in that, The first drive shaft (37) is mounted on the crushing box (1) via the first main sealing ring (41). A wear-resistant ring (36) is fitted on the first drive shaft (37) and on the side of the three-tooth crushing cutter (16). A first sealing pressure plate (47) is provided between the wear-resistant ring (36) and the first main sealing ring (41). A mudguard ring (38) is fitted on the outer periphery of the wear-resistant ring (36).

6. The tunneling machine with a crushing device according to claim 5, characterized in that, The first drive shaft (37) is fitted with a second main sealing ring (33), the second main sealing ring (33) is connected to the outer end face of the first main sealing ring (41), a self-aligning bearing (31) is installed on the outer periphery of the first drive shaft (37) and on the outer end face of the second main sealing ring (33), a bearing seat (32) is fitted on the outer periphery of the self-aligning bearing (31), and the bearing seat (32) is connected to the second main sealing ring (33), and a first bearing end cap (45) or a second bearing end cap (48) for sealing the self-aligning bearing (31) is fixed on the bearing seat (32).

7. The tunneling machine with a crushing device according to claim 6, characterized in that, A sealing structure is provided between the first main sealing ring (41), the second main sealing ring (33), and the first drive shaft (37).

8. The tunneling machine with a crushing device according to claim 1, characterized in that, The second crushing toothed roller includes a second drive shaft and a plurality of six-tooth crushing cutters (18), the plurality of six-tooth crushing cutters (18) being mounted on the second drive shaft with staggered teeth, and the second drive shaft being connected to the second drive member.

9. The tunneling machine with a crushing device according to claim 1, characterized in that, The top of the feed chamber box (2) is provided with a feed port cover plate (3), and the side of the feed chamber box (2) is provided with a slurry outlet flange.

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