Special-shaped tunnel corner excavation device and tunneling machine

Abstract

The present application belongs to the technical field of tunneling equipment, and specifically provides a special-shaped tunnel corner excavation device and a tunneling machine. The excavation device comprises a main beam, a movable seat movably mounted on the main beam, mounting racks for mounting a rock breaking device mounted on the left and right sides of the movable seat, a leveling compensation mechanism for adjusting the horizontal angle of the mounting rack to compensate for the offset of the wheeled trailer, the leveling compensation mechanism comprising a leveling driving device, the main beam having a hinged connection part for being hinged to the wheeled trailer, one end of the leveling driving device being used for being connected to the main beam and the other end being used for being connected to the wheeled support trailer, or the mounting rack being hinged to the movable seat, one end of the leveling driving device being used for being connected to the mounting rack and the other end being used for being connected to the movable seat. The tunneling machine comprises the above-mentioned excavation device. The present application can drive the rock breaking device to rotate through the leveling compensation mechanism, ensure the horizontal of the rock breaking device, and ensure the shape of the excavation section. Meanwhile, the rock breaking device can be actively released from the trouble.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunneling equipment, in particular to a special-shaped tunnel corner excavation device and a tunneling machine. BACKGROUND

[0002] In recent years, the mining industry in China has developed rapidly, with more than 12000 kilometers of new tunneling length every year, and the scale is huge. The coal mine rock roadway mainly includes high drainage roadway, bottom drainage roadway and development roadway, and the cross section of the roadway is generally straight wall and semicircular arch shape. The traditional excavation method of straight wall and semicircular arch tunnel is to use a boom-type tunneling machine or a drill and blast method. However, this excavation method has problems such as low efficiency and poor construction environment.

[0003] In order to efficiently and flexibly excavate the corners of a special-shaped tunnel, the patent application (CN114562283A) of the applicant discloses a special-shaped tunnel corner excavation device. The excavation device includes a front support, a rear support, and a main beam arranged between the front and rear supports. A sliding sleeve is installed on the main beam. The sliding sleeve is provided with cutter head mounting racks on the left and right sides. The cutter head mounting racks are provided with cutter heads. The two cutter heads excavate the corners of the tunnel. The excavation device also includes a horizontal driving mechanism for driving the cutter heads to move forward.

[0004] The above-mentioned excavation device can independently walk and change steps with the circular cross-section main machine, efficiently and flexibly realizing one-time excavation and forming of the special-shaped tunnel. However, in the actual application process, the tunnel bottom needs to be backfilled first, and the track needs to be laid for the front and rear supports to walk. The rock debris excavated from the corners also needs to be transported out of the hole, and the operation process is complicated.

[0005] The patent application with the publication number CN115405310A (publication date: November 29, 2022) discloses a one-time forming device for special-shaped tunnel TBM construction. The device includes "eight" shaped walking wheels, and the two walking wheels walk along the tunnel bottom. It also includes crushers arranged on both sides. The two side crushers excavate the corner areas on both sides of the tunnel and fill the rock debris excavated from the corners to the tunnel bottom.

[0006] The above-mentioned one-time forming device realizes automatic filling of the tunnel bottom and efficient use of excavated rock debris. However, the crushing efficiency of the crusher is low, and it is difficult to control the cross-sectional shape, which may cause excessive overbreak and poor forming effect.

[0007] Through analysis, it is found that relying on the "eight" shaped walking wheels to walk along the tunnel bottom wall, using the one-time forming rock breaking cutter or cutting assembly to excavate the corners, and backfilling the rock debris excavated from the corners to the tunnel bottom is an efficient tunnel forming method. However, in fact, due to the backfilling of rock debris at the bottom of the tunnel, the walking wheels may tilt up and down and left and right during walking, causing the rock breaking cutter or cutting assembly to be stuck or the cross-sectional shape to be offset. SUMMARY

[0008] The present application aims to provide a special-shaped tunnel corner excavation device to solve the technical problem that the corner excavation rock breaking cutter head or cutting assembly is prone to be stuck or deviate from the section shape in the prior art.

[0009] To achieve the above-mentioned purpose, the technical scheme of the special-shaped tunnel corner excavation device provided by the present application is as follows:

[0010] A special-shaped tunnel corner excavation device comprises a main beam, a movable seat movably mounted on the main beam, mounting frames for mounting rock breaking devices mounted on the left and right sides of the movable seat, a leveling compensation mechanism arranged on the mounting frames, the leveling compensation mechanism being used to adjust the horizontal angle of the mounting frames to compensate for the deviation of the wheel trailer, the leveling compensation mechanism comprising a leveling driving device, the main beam having a hinged connection part for being hinged with the wheel trailer, one end of the leveling driving device being used to be connected with the main beam and the other end being used to be connected with the wheel support trailer, or the mounting frames being hinged on the movable seat, one end of the leveling driving device being used to be connected with the mounting frames and the other end being used to be connected with the movable seat.

[0011] The present application improves the special-shaped tunnel corner excavation device in the prior art. In the process of excavating the corner regions on the left and right sides of the tunnel, if the trailer is rolled on the rock debris to cause the height deviation on both sides and cause the equipment to be stuck, the leveling compensation mechanism can be adjusted to adjust the horizontal swing angle of the mounting frames to realize the swing of the rock breaking device, thereby releasing the stuck state. Meanwhile, the leveling compensation mechanism can be actively adjusted to ensure that the rock breaking devices on both sides are in the flush state before the corner excavation, which ensures the flatness of the corner regions on both sides, thereby solving the problem that the excavation shape of the special-shaped section is prone to deviation.

[0012] As a further improvement, the mounting frames are telescopic frames which can be telescopically extended along the hinged axis of the main beam or the mounting frames.

[0013] The telescopic frame can drive the rock breaking device to telescopically extend synchronously, so that the rock breaking device can still be stably cut to the corner when the rock breaking device is rotated by a large angle, thereby ensuring the excavation shape of the corner. In addition, when the excavation device as a whole steps with the pulling device, the telescopic frame can be retracted to avoid the rock breaking device from scratching the rock wall on both sides, thereby protecting the cutter of the rock breaking device and the rock wall.

[0014] As a further improvement, a telescopic rod is mounted in the movable seat, a telescopic driving device is arranged between the movable seat and the telescopic rod, and the telescopic rod is used to mount the rock breaking device and form the mounting frames.

[0015] The beneficial effect is: at this time, the structure is relatively simple, convenient for engineering practical application, and low in cost.

[0016] As a further improvement, the rock breaking device comprises a cutting assembly, the cutting assembly comprising a cutting head and cutting teeth mounted on the cutting head, the cutting teeth being arranged helically along the axial direction of the cutting head.

[0017] The beneficial effect is: the cutting teeth are arranged helically, which can guide the corner rock slag to the bottom of the tunnel while rotating the rock, realizing the secondary utilization of the rock slag, and no longer needing to arrange a slag discharge device. At the same time, the workload of subsequent secondary bottom paving can be reduced, and the bottom paving efficiency can be improved.

[0018] As a further improvement, the cutting head is also provided with a guide plate arranged helically.

[0019] The beneficial effect is: the efficiency of the corner rock slag backfilling and bottom paving is improved.

[0020] As a further improvement, the excavation device further comprises a wheeled trailer, the trailer comprising a support platform and an "eight" shaped walking wheel arranged at the bottom of the support platform.

[0021] The beneficial effect is: the wheeled trailer has good mobility, can directly walk along the bottom of the tunnel, and provides an avoidance space at the center of the bottom for rock slag backfilling. At this time, the excavation device can be directly connected with the tunneling machine as a whole, which is convenient and efficient.

[0022] As a further improvement, the walking wheel is connected with the support platform through a walking wheel frame hinged on the support platform, and an obstacle surmounting oil cylinder is arranged between the walking wheel frame and the support platform.

[0023] The beneficial effect is: at this time, not only can the trailer actively realize left and right turning, but also can actively adjust the posture of the walking wheel when the walking wheel has difficulty in surmounting obstacles, thereby improving the obstacle surmounting capability.

[0024] As a further improvement, the walking wheel frame is also provided with a slag blocking plate.

[0025] The beneficial effect is: to prevent the corner rock slag on both sides from hitting the walking wheel, thereby protecting the walking wheel.

[0026] As a further improvement, the mounting frame is also provided with a dust removal cover.

[0027] The beneficial effect is: the dust removal cover can be connected with a dust removal device to seal and collect the dust generated by the corner excavation, thereby improving the construction environment of the tunnel.

[0028] To achieve the above-mentioned purpose, the technical scheme of the tunneling machine provided by the present application is:

[0029] The tunneling machine comprises a main machine and a special-shaped tunnel corner excavation device, wherein the special-shaped tunnel corner excavation device comprises a main beam, a movable seat movably arranged on the main beam, and a mounting frame for mounting a rock breaking device arranged on the left and right sides of the movable seat.

[0030] The present application improves the special-shaped tunnel corner excavation device in the prior art.

[0031] As a further improvement, the mounting frame is a telescopic frame which can be telescopically extended along the hinge axis of the main beam or the mounting frame.

[0032] The telescopic frame can drive the rock breaking device to telescopically extend or retract synchronously, so that the rock breaking device can still stably cut the corner when the rock breaking device rotates a large angle, and the shape of the corner excavation is ensured.

[0033] As a further improvement, a telescopic rod is arranged in the movable seat, a telescopic driving device is arranged between the movable seat and the telescopic rod, and the telescopic rod is used for mounting the rock breaking device and forms the mounting frame.

[0034] The structure is relatively simple, and the present application is convenient for engineering application and has low cost.

[0035] As a further improvement, the rock breaking device comprises a cutting assembly, the cutting assembly comprises a cutting head and a cutting pick arranged on the cutting head, and the cutting pick is spirally arranged along the axial direction of the cutting head.

[0036] The beneficial effects are: the spiral arrangement of the cutting teeth, while rotating to break the rock, can guide the edge rock debris to the bottom of the tunnel, realizing the secondary utilization of the rock debris and eliminating the need for a muck removal device. At the same time, it can also reduce the workload of subsequent secondary paving and improve paving efficiency.

[0037] As a further improvement, the cutting head is also provided with a guide plate arranged in the same spiral pattern.

[0038] The beneficial effect is that it improves the efficiency of backfilling and laying rock debris at the edges and corners.

[0039] As a further improvement, the excavation device also includes a wheeled trailer, which includes a support platform and figure-eight wheels located at the bottom of the support platform.

[0040] The advantages are: wheeled trailers have good mobility, can travel directly along the bottom of the tunnel, and provide clearance at the center of the bottom for backfilling rock debris. At this time, the excavation unit can be directly connected to the tunneling machine's towing equipment as a whole, which is convenient and efficient.

[0041] As a further improvement, the traveling wheel is connected to the support platform via a traveling wheel frame hinged to the support platform, and an obstacle-crossing cylinder is provided between the traveling wheel frame and the support platform.

[0042] The beneficial effects are: at this time, not only can the trailer actively turn left and right, but it can also actively adjust the attitude of the walking wheels when it has difficulty crossing obstacles, thereby improving its obstacle-crossing ability.

[0043] As a further improvement, the walking wheel frame is also equipped with a slag baffle.

[0044] The beneficial effect is that it prevents rock debris from hitting the wheels on both sides and corners, thus protecting the wheels.

[0045] As a further improvement, the mounting bracket is also equipped with a dust cover.

[0046] The beneficial effects are: the dust cover can be connected to dust removal equipment to seal and collect the dust generated during corner excavation, thus improving the tunnel construction environment. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the main structure of the tunneling machine in Embodiment 1 of the present invention;

[0048] Figure 2 This is a schematic diagram of the irregular tunnel corner excavation device structure of embodiment 1 of the tunnel boring machine in this invention;

[0049] Figure 3 for Figure 2 Side view;

[0050] Figure 4 for Figure 2A partial top view;

[0051] Figure 5 for Figure 2 A magnified view of a portion of the image;

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Cutterhead; 2. Top shield; 3. First-stage propulsion cylinder; 4. First-stage main beam; 5. First-stage support shoe; 6. Rear support; 7. Traction cylinder; 8. Second-stage main beam; 9. Second-stage propulsion cylinder; 10. Second-stage support shoe; 11. Cutting assembly; 12. Telescopic rod; 13. Telescopic cylinder; 14. Pin shaft; 15. Dust hood; 16. Dust collection duct; 17. Dust collector; 18. Leveling cylinder; 19. Guide plate; 20. Traveling wheel; 21. Sliding sleeve; 22. Support platform; 23. Cutting teeth; 24. Obstacle crossing cylinder; 25. Slag baffle. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0056] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the process or method that includes said element.

[0057] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

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

[0060] Specific embodiment 1 of the tunneling machine provided by the present invention:

[0061] The tunneling machine provided in this embodiment includes a main unit and an irregular tunnel corner excavation device. The structure of the main unit is as follows: Figure 1 As shown, it includes a cutterhead 1, a main drive, a top shield 2, a first-stage propulsion cylinder 3, a first-stage main beam 4, a first-stage support shoe 5, and a rear support 6. The first-stage support shoe 5 is slidably arranged on the first-stage main beam 4, and the rear support 6 is located at the tail of the first-stage main beam 4. The main structure of the host in this embodiment is consistent with the main structure of the open-type TBM in the prior art, and will not be described in detail.

[0062] like Figure 1 and Figure 2 As shown, in this embodiment, the irregular tunnel corner excavation device is connected to the main unit via a drag cylinder 7. During the step-changing action, the drag cylinder 7 pulls the irregular tunnel corner excavation device to advance and change steps. Specifically, as shown... Figures 2-5 As shown, the irregular tunnel corner excavation device includes a wheeled trailer, which includes a support platform 22 and traveling wheels 20. The traveling wheels 20 have a symmetrical “V” arrangement structure and can travel directly along the tunnel walls on the left and right sides of the bottom of the tunnel, leaving space for the bottom paving or installation of other auxiliary equipment.

[0063] The corner excavation device includes a leveling and compensation mechanism. Specifically, a secondary main beam 8 is provided on the support platform 22. The secondary main beam 8 has a hinged connection part for hinged connection with the support platform 22, and is hinged to the support platform via a pin 14. The rotational hinge axis of the pin 14 extends in the front-rear direction. A leveling drive device is also provided between the secondary main beam 8 and the support platform 22. The leveling drive device is used to drive the secondary main beam 8 to rotate along the pin 14. In this embodiment, the leveling drive device is a leveling cylinder 18 located on one side of the secondary main beam 8. One end of the leveling cylinder 18 is connected to the secondary main beam 8, and the other end is connected to the support platform 22. That is, the hinged connection part of the secondary main beam 8 and the leveling drive device together form the leveling and compensation mechanism. Of course, the leveling drive device can also be a leveling cylinder located on both sides of the secondary main beam 8, or it can be a cylinder or a screw-nut mechanism, etc.

[0064] The secondary main beam 8 is equipped with a movable seat that can move back and forth. Specifically, in this embodiment, the movable seat is a sliding sleeve 21, which is connected to a mounting frame for installing a rock-breaking device. In other embodiments, the movable seat can be a movable platform that rolls along the secondary main beam 8. Additionally, in this embodiment, a telescopic rod 12 is provided inside the sliding sleeve 21, and a telescopic cylinder 13 is provided between the sliding sleeve 21 and the telescopic rod 12. One end of the telescopic cylinder 13 is connected to the sliding sleeve 21, and the other end is connected to the telescopic rod 12. The telescopic direction of the telescopic rod 12 is radial to the hinge pin.

[0065] The rock-breaking device installed on the telescopic rod 12 includes a cutting assembly 11 and a rotary drive device (not shown in the figure) that drives the cutting assembly 11 to rotate. The cutting assembly 11 can move synchronously with the telescopic rod 12. The cutting assembly 11 includes a cutting head and cutting teeth 23 installed on the cutting head. The cutting teeth 23 are used to cut the corner rock mass to achieve rock breaking and excavation. The cutting teeth 23 are spirally arranged along the axis of the cutting head, so that the rock debris generated from cutting the corner rock mass can flow into the center of the tunnel bottom with the spiral movement of the cutting teeth 23. Therefore, in this embodiment, it is not necessary to configure a corresponding muck discharge mechanism for the corner excavation rock debris separately, and the corner rock debris can be effectively used for bottom paving, which also reduces the workload of subsequent secondary bottom paving and improves efficiency. In order to improve the flow guiding efficiency, the cutting head is also provided with a guide plate 19 with the same spiral arrangement. The guide plate 19 can improve the efficiency of rock debris spiral conveying.

[0066] Secondary support shoes 10 are also provided on both sides of the secondary main beam 8. The secondary support shoes 10 are used to brace the tunnel walls on both sides of the tunnel to ensure the stability of the cutting head's forward movement and also to ensure the stability of the trailer during downhill excavation. In this embodiment, secondary support shoes 10 are provided on both the front and rear sides of the sliding sleeve 21. The secondary propulsion cylinder 9, which provides forward thrust to the cutting assembly, is located between the secondary support shoes 10 and the sliding sleeve 21 on the rear side of the sliding sleeve 21.

[0067] In this embodiment, a wheel frame is provided between the traveling wheels 20 of the wheeled trailer and the support platform 22. The wheel frame is hinged to the support platform 22. An obstacle-crossing cylinder 24 is also connected between the support platform and the wheel frame. The obstacle-crossing cylinder 24 can, on the one hand, push the wheel frame to rotate so that the wheeled trailer can turn; on the other hand, if the corner rock debris excavated by the cutting component 11 accumulates at the bottom of the tunnel and affects the forward movement of the traveling wheels 20, the obstacle-crossing cylinder 24 can be actively adjusted to make the traveling wheels 20 swing, clearing a path for forward movement and improving obstacle-crossing ability. To prevent corner rock debris from damaging the traveling wheels, a baffle plate 25 is also provided on the wheel frame.

[0068] In this embodiment, a dust collector 15 is also fitted onto the rock-breaking device mounting frame, i.e., the telescopic rod 12. The dust collector 15 is connected to a dust collector 17 via a dust collector duct 16. The dust collector 15 is used to contain the dust generated when the cutting component 11 breaks rock. The dust is collected through the dust collector duct 16 and the dust collector 17, improving the tunnel environment and reducing pollution to the tunnel. One dust collector 15 is arranged on each of the left and right sides, and they can move back and forth synchronously to effectively contain the dust generated during rock breaking. The dust collector duct 16 is a flexible duct, which is convenient for storage and facilitates the extension and retraction of the duct when the dust collector hood moves back and forth.

[0069] The specific construction process of this embodiment includes the following steps:

[0070] S1: The first-stage support shoe 5 extends to brace the tunnel wall, the first-stage propulsion cylinder 3 extends to push the first-stage main beam 4 and cutterhead 1 forward, and the cutterhead 1 rotates to break the rock and form a circular cross-section at the front.

[0071] S2: The secondary support shoe 10 extends to tighten the tunnel wall, and then the telescopic cylinder 13 extends to extend the cutting component 11 to the specified width. The telescopic cylinder 13 maintains pressure, and then the secondary propulsion cylinder 9 extends forward from the zero position to push the cutting component 11 to rotate and break the rock, forming a straight wall semi-circular arch section.

[0072] S3: After the first-stage propulsion cylinder 3 extends by one stroke, the rear support 6 extends to support the main unit, the first-stage support shoe 5 retracts, then the first-stage propulsion cylinder 3 retracts forward, dragging the first-stage support shoe 5 forward along the first-stage main beam 4 by one stroke, then the first-stage support shoe 5 extends to tighten the tunnel wall, the rear support 6 retracts, the drag cylinder 7 retracts forward, dragging the irregular tunnel corner excavation device forward by one stroke;

[0073] S4: During S3, before the towing cylinder 7 retracts forward, the secondary propulsion system and support trailer need to complete the following actions: the secondary propulsion cylinder 9 advances forward, completes one stroke to cut and break the rock, then the telescopic cylinder 13 drives the cutting assembly 11 to retract, followed by the secondary propulsion cylinder 9 driving the cutting assembly 11 to retract to the zero position, and then the secondary support shoe 10 retracts. After the above actions are completed, the irregular tunnel corner excavation device moves forward one stroke with the towing cylinder 7;

[0074] S5: Before excavating the corners, first adjust the extension of the leveling cylinder 18 to drive the cutting component 11 to fine-tune the rotation angle and level the cutting component 11. Then the secondary support shoe 10 extends to complete the step change and start the next cycle.

[0075] S6: When performing corner excavation and cutting work, the dust hood 15 moves back and forth with the cutting assembly 11, and the generated dust enters the dust collector 17 through the dust removal duct 16 to collect and process the generated dust.

[0076] S7: Repeat S1 to S6 to complete the tunnel construction.

[0077] In this embodiment, with the coordinated operation of the main unit and the irregular tunnel corner excavation device, a right-angled semi-circular arched tunnel can be formed in one step. Furthermore, the leveling and compensation mechanism ensures the right-angled shape of the excavated tunnel corner, resulting in high precision of the excavation cross-section. Simultaneously, if the trailer shifts left or right and causes the cutting components 11 on both sides to jam due to rock debris falling to the bottom of the tunnel, the leveling cylinder 18 can be adjusted to rotate the cutting components 11, compensating for the trailer's shift. This solves the problems of easy deviation in the tunnel corner excavation cross-section shape or easy jamming of the rock-breaking device.

[0078] Furthermore, in this embodiment, the cutting component 11 can extend and retract with the telescopic rod 12. During the step-changing process, the cutting component 11 is in a retracted state and will not collide with the corners, thus protecting both the cutting component 11 and the cross-sectional shape of the corners. At the same time, when the leveling cylinder 18 needs to rotate the cutting component 11 to a large extent for leveling, the extension length of the telescopic rod 12 can be adjusted synchronously to ensure that the cutting component 11 can contact the corners and to ensure that the excavation depth of the corners is consistent.

[0079] The specific embodiment 2 of the tunneling machine provided by this invention differs from embodiment 1 mainly in that: In embodiment 1, the secondary main beam 8 has a hinged connection for hinged connection with the trailer, and a leveling cylinder 18 for driving the secondary main beam 8 to rotate around the hinge axis is provided between the secondary main beam 8 and the trailer. In this embodiment, the secondary main beam is fixed on the trailer, and rotating mounting frames are provided on both sides of the sliding sleeve. One end of the mounting frame is hinged to the sliding sleeve, and a cylinder for driving the mounting frame to rotate is provided between the sliding sleeve and the mounting frame. That is, the hinged structure of the leveling cylinder and the mounting frame forms a leveling compensation mechanism. Before corner excavation or when the rock breaking device is stuck, driving the mounting frame to rotate can achieve the same effect as in embodiment 1. In addition, the mounting frame in this embodiment is a telescopic frame. The movable end of the telescopic frame is used to connect the rock breaking device, and the fixed end is used to connect the cylinder for driving the telescopic frame to rotate.

[0080] The specific embodiment 3 of the tunneling machine provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the cutting assembly 11 is mounted on a mounting frame with a telescopic function (telescopic rod 12). In this embodiment, the mounting frame is non-telescopic, but it can still achieve leveling and obstacle removal functions under the action of the leveling cylinder.

[0081] The specific embodiment 4 of the tunneling machine provided by the present invention differs from embodiment 1 mainly in that: in embodiment 1, the rock-breaking device includes a cutting component 11. In this embodiment, the rock-breaking device is a cutterhead, which can be a wheel-type cutterhead as described in the patent document with application publication number CN114562283A or the patent document with authorization announcement number CN217080467U.

[0082] The specific embodiment 5 of the tunnel boring machine provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the irregular tunnel corner excavation device includes a wheeled trailer. In this embodiment, the irregular tunnel corner excavation device does not include a wheeled trailer, but only includes a secondary main beam and related structures connected to the secondary main beam. In use, the secondary main beam can be connected to the rear trailer of the tunnel boring machine.

[0083] The specific embodiment 6 of the tunneling machine provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the tunneling machine host is an open-type TBM host structure. In this embodiment, the host is a shield-type host, and the specific structure can be found in the patent document with application publication number CN114837682A.

[0084] Embodiments of the irregular tunnel corner excavation device of the present invention:

[0085] The embodiments of the irregular tunnel corner excavation device are the irregular tunnel corner excavation devices or related structures described in any of the embodiments 1 to 5 of the above-mentioned tunneling machine, and will not be specifically described here.

[0086] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for excavating the corner of an irregularly shaped tunnel, comprising a wheeled trailer and a main beam, wherein a movable seat that can move back and forth is mounted on the main beam, and mounting frames are mounted on the left and right sides of the movable seat, and rock-breaking devices are mounted on the mounting frames, characterized in that, The mounting bracket is equipped with a leveling compensation mechanism, which is used to adjust the horizontal angle of the mounting bracket to compensate for the offset of the wheeled trailer. The leveling compensation mechanism includes a leveling drive device, and the connection method of the leveling drive device adopts one of the following methods: ①The main beam has a hinged connection part that is hinged to the wheeled trailer, and one end of the leveling drive device is connected to the main beam and the other end is connected to the wheeled trailer. ②The mounting bracket is hinged to the movable seat, and one end of the leveling drive device is connected to the mounting bracket, and the other end is connected to the movable seat.

2. The irregular tunnel corner excavation device according to claim 1, characterized in that, For method ①, the mounting frame is a telescopic frame that can extend and retract radially along the hinge axis of the main beam.

3. The irregular tunnel corner excavation device according to claim 2, characterized in that, A telescopic rod is installed inside the movable seat, and a telescopic drive device is provided between the movable seat and the telescopic rod. The telescopic rod is used to install the rock-breaking device and forms the mounting frame.

4. The irregular tunnel corner excavation device according to claim 1, characterized in that, The rock-breaking device includes a cutting assembly, which includes a cutting head and cutting teeth mounted on the cutting head, the cutting teeth being helically arranged along the axial direction of the cutting head.

5. The irregular tunnel corner excavation device according to claim 4, characterized in that, The cutting head is also equipped with a guide plate arranged in the same spiral pattern.

6. The irregular tunnel corner excavation device according to claim 1, characterized in that, The wheeled trailer includes a support platform and figure-eight shaped wheels located at the bottom of the support platform.

7. The irregular tunnel corner excavation device according to claim 6, characterized in that, The walking wheels are connected to the support platform via a walking wheel frame hinged to the support platform, and an obstacle-crossing cylinder is provided between the walking wheel frame and the support platform.

8. The irregular tunnel corner excavation device according to claim 7, characterized in that, The walking wheel frame is also equipped with a slag baffle.

9. The irregular tunnel corner excavation device according to claim 1, characterized in that, The mounting bracket is also equipped with a dust cover.

10. A tunneling machine, including a main unit, characterized in that, It also includes the irregular tunnel corner excavation device according to any one of claims 1-9.

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