A special-shaped tunnel excavation device and a special-shaped tunnel boring machine

Abstract

The present invention relates to the field of tunnel boring machines, and in particular to a special-shaped tunnel excavation device and a special-shaped tunnel excavation machine. The special-shaped tunnel excavation device includes a main beam, a first support device and a second support device are arranged on the main beam, the first support device and the second support device both include support shoes, and at least one of the first support device and the second support device also includes a sliding shoe, the sliding shoe is used for sliding support on the bottom wall of the tunnel, and a drag connection structure is arranged on the first support device or the main beam; a guide sleeve is installed on the main beam, a cutterhead mounting seat is connected to the guide sleeve, and a wheel cutterhead is rotatably mounted on the cutterhead mounting seat; the special-shaped tunnel excavation device also includes a telescopic drive mechanism for driving the wheel cutterhead to move forward. The special-shaped tunnel excavation device of the present invention only uses a set of sliding assembly structures of the main beam and the guide sleeve to perform excavation, and has a relatively simple structure and is more convenient to control. It can not only reduce costs, but also simplify construction operations and improve construction efficiency.

Description

Technical Field

[0001] The invention relates to the field of tunnel boring machines, and in particular to a special-shaped tunnel excavation device and a special-shaped tunnel boring machine. Background Art

[0002] Special-shaped tunnels include tunnels that are different from circular shapes, such as city gates, rectangles, and horseshoes. This type of tunnel is extremely widely used, mainly in national defense, energy, transportation, water conservancy, and urban peacetime and wartime projects. Compared with circular tunnels, special-shaped tunnels have a 15-20% higher space utilization rate, and take into account both structural stress and space utilization characteristics.

[0003] In the field of tunnel construction equipment, circular-section shield machines or TBMs are already very mature, and in the field of special-section tunneling machines, multi-cutter non-circular-section tunneling equipment for soft soil layers has been successfully developed. However, for hard rock special-section tunnels, only drilling and blasting methods or cantilever tunneling machines that are only suitable for soft rock can be used, which have disadvantages such as high risk, high pollution, and low efficiency.

[0004] The Chinese invention patent application with application publication number CN113586073A discloses a continuous excavation device and a full-face tunnel boring machine, the full-face tunnel boring machine includes a circular cutter head and a front main beam arranged front and back, the continuous excavation device includes a rear main beam and a slide box arranged inside and outside, the rear main beam extends front and back and is connected to the front main beam, the slide box can slide back and forth along the rear main beam, and the left and right sides of the slide box are provided with excavation mechanisms. Specifically, the left and right sides of the lower part of the slide box are provided with slideways extending front and back, the excavation mechanism includes a slider slidably assembled in the slideway, a support arm connected to the slider, and a wheel cutter head connected to the support arm, and also includes a propulsion cylinder and a swing cylinder, one end of the propulsion cylinder is hinged to the slider, and the other end is hinged to the slide box, the propulsion cylinder can drive the slider to move forward and backward, thereby driving the support arm and the wheel cutter head to move forward and backward, one end of the swing cylinder is hinged to the slider, and the other end is hinged to the support arm, the swing cylinder can drive the support arm to swing forward and backward, thereby driving the wheel cutter head to swing forward and backward. The continuous excavation device also includes a main oil cylinder and support shoes. One end of the main oil cylinder is hinged to the slide box, and the other end is hinged to the rear main beam. The main oil cylinder can drive the slide box to move forward and backward. The support shoes are arranged on the left and right sides of the slide box and can tighten the side wall of the tunnel by telescoping.

[0005] When the above-mentioned full-section tunnel boring machine is working, the circular cutter disc at the front end of the full-section tunnel boring machine excavates the circular cross-section tunnel, and the wheel cutter disc at the rear end of the full-section tunnel boring machine excavates the circular cross-section tunnel for the second time, so that the full-section tunnel boring machine finally excavates tunnels with special cross-sections such as city gates, rectangles, and horseshoes. However, in the process of the continuous excavation device performing secondary excavation on the circular cross-section tunnel, it is necessary to control the main oil cylinder to drive the slide box to move forward and backward, and it is also necessary to control the propulsion oil cylinder to drive the slide block to move forward and backward. Not only is the excavation process more cumbersome, but the structure of the continuous excavation device is also more complicated, which increases the manufacturing cost of the tunnel boring machine and also makes the excavation efficiency of the full-section tunnel boring machine lower. In addition, the above-mentioned continuous excavation device is mounted on the existing tunnel boring machine to form a complete full-section tunnel boring machine. When the full-section tunnel boring machine is excavating, the special-shaped tunnel is excavated and formed at one time. Therefore, the structure and control of the entire full-section tunnel boring machine are more complicated, and the application flexibility when excavating special-shaped tunnels is insufficient. Summary of the invention

[0006] The purpose of the present invention is to provide a special-shaped tunnel excavation device to solve the technical problems that the existing tunnel boring machine for excavating special-shaped tunnels has a relatively complex structure and a relatively cumbersome excavation process. The present invention also provides a special-shaped tunnel boring machine including the above-mentioned special-shaped tunnel excavation device.

[0007] The technical solution of the special-shaped tunnel excavation device of the present invention is:

[0008] The special-shaped tunnel excavation device includes a main beam extending forward and backward, and a first supporting device and a second supporting device are arranged on the main beam at intervals in front and back. The first supporting device and the second supporting device both include support shoes for tightening the inner wall of the tunnel, and at least one of the first supporting device and the second supporting device also includes a sliding shoe, which is used for sliding support on the bottom wall of the tunnel. A towing connection structure for connecting to a towing device is arranged on the first supporting device or the main beam; a guide sleeve is installed on the main beam for front and rear guiding movement, the guide sleeve is located between the first supporting device and the second supporting device, a cutter disc mounting seat is connected to the guide sleeve, a wheel cutter disc is rotatably mounted on the cutter disc mounting seat, and the wheel cutter disc is used for secondary excavation of the tunnel; the special-shaped tunnel excavation device also includes a telescopic drive mechanism, one end of the telescopic drive mechanism is connected to the first supporting device or the second supporting device, and the other end is connected to the cutter disc mounting seat or the guide sleeve, and is used to drive the wheel cutter disc to move forward.

[0009] Beneficial effects: The special-shaped tunnel excavation device of the present invention is supported on the bottom wall of the tunnel by sliding shoes, so that the entire special-shaped tunnel excavation device can move independently, that is, it can exist independently; and the first supporting device is provided with a towing connection structure for connecting with the towing equipment, so that the special-shaped tunnel excavation device can be mounted on the existing shield machine, and can also be connected with other towing equipment (such as locomotives, winches, etc.), so that it can not only meet the needs of the first excavation and forming of the special-shaped cross-section tunnel, but also independently carry out the secondary excavation of the formed circular cross-section tunnel, and the use flexibility is higher. In addition, the first supporting device and the second supporting device are provided with support shoes for tightening on the inner wall of the tunnel. When the support shoes are tightened on the inner wall of the circular cross-section tunnel, the first and second supporting devices and the main beam can be kept fixed, and the wheeled cutter head can move under the drive of the telescopic driving mechanism to realize the secondary excavation of the circular cross-section tunnel. The present invention only uses the main beam and the guide sleeve as a set of sliding assembly structures for excavation, and the structure is relatively simple, and the control is more convenient, which can not only reduce the cost, but also simplify the construction operation and improve the construction efficiency.

[0010] Furthermore, the sliding shoe is located at the front side of the wheel cutter disc and at the bottom of the first supporting device, the second supporting device is supported and cooperated with the inner wall of the tunnel only through the supporting shoe, and a slag collecting space is formed under the second supporting device for the slag collecting device to extend into.

[0011] Beneficial effects: This arrangement makes the arrangement of the first supporting device and the second supporting device relatively simple, and the arrangement of the slag collecting space below the second supporting device facilitates the removal of the slag cut off by the wheel cutter disc.

[0012] Furthermore, the telescopic drive mechanism is located at the front side of the wheel cutter disc, and one end of the telescopic drive mechanism is connected to the first supporting device.

[0013] Beneficial effect: Compared with setting the telescopic drive mechanism on the second support device, the telescopic drive mechanism is connected to the first support device, so that the second support device can be shorter in the vertical direction, and the overall structure of the second support device is simpler and easier to process.

[0014] Further, the first supporting device includes a first supporting seat, the support shoes on the first supporting device are first supporting device support shoes, at least two groups of first supporting device support shoes are arranged at intervals in front and behind, at least two first supporting device support shoes are arranged in the same group, and the first supporting device support shoes in the same group are arranged at intervals along the circumference of the first supporting seat.

[0015] Beneficial effect: The support shoes of the first supporting device are arranged with at least two groups spaced apart from each other, so that the support shoes of the first supporting device have a better tightening effect on the inner wall of the tunnel and can provide a sufficiently large supporting force.

[0016] Further, the first support device gripper shoe comprises a shoe body and a gripper shoe cylinder, at least two gripper shoe cylinders are arranged on the first support device gripper shoe, and the gripper shoe cylinders on the first support device gripper shoe are arranged at intervals along the circumferential direction of the first support seat.

[0017] Beneficial effect: The support shoe cylinders are arranged at intervals along the circumference of the first support seat, so that the spacing between two adjacent groups of first support device support shoes is smaller, thereby making the size of the first support seat along the front-to-back direction smaller, and the overall structure of the special-shaped tunnel excavation device is more compact.

[0018] Furthermore, the first supporting device includes a first supporting seat, a constant-pressure floating supporting structure is arranged at the bottom of the first supporting seat, and the sliding shoe is installed at the bottom of the constant-pressure floating supporting structure.

[0019] Beneficial effects: By adjusting the constant pressure floating support structure, the sliding shoe is always pressed against the inner wall of the tunnel to prevent the main beam from tilting. In addition, when the special-shaped tunnel excavation device is in the process of uphill or downhill or small curve excavation, when there is a pressure change between the main beam and the guide sleeve, the sliding shoe can move up and down to ensure the smooth sliding of the main beam in the guide sleeve to avoid jamming.

[0020] Furthermore, the rotation axis of the wheel cutter disc extends in the vertical direction.

[0021] Beneficial effects: The rotation axis of the wheel cutter disc extends in the vertical direction, so that the excavation width of the wheel cutter disc is larger and the bottom wall of the tunnel excavated by the wheel cutter disc is smoother.

[0022] Furthermore, the cutter disc mounting seat is movably mounted on the guide sleeve for up and down guides, the wheel cutter discs arranged in pairs on the left and right are mounted on the same cutter disc mounting seat, and a mounting seat driving mechanism is connected between the guide sleeve and the cutter disc mounting seat, and the mounting seat driving mechanism is used to drive the cutter disc mounting seat to move up and down.

[0023] Beneficial effect: The mounting seat driving mechanism drives the cutter disc mounting seat to move up and down, so that the wheel cutter disc can move up and down, thereby enabling the wheel cutter disc to better perform secondary excavation on the circular cross-section tunnel.

[0024] Furthermore, a telescopic sleeve is provided at the bottom of the guide sleeve, and the telescopic sleeve comprises a main cylinder body fixed to the guide sleeve and a secondary cylinder body fixed to the cutter disc mounting seat, and the secondary cylinder body is slidably and circumferentially assembled inside the main cylinder body so that the cutter disc mounting seat can deflect relative to the guide sleeve.

[0025] Beneficial effect: The cutterhead mounting seat can be deflected relative to the guide sleeve, so that the wheel cutterhead can meet the needs of small curve construction, thereby making the special-shaped tunnel excavation device more adaptable.

[0026] Furthermore, the wheel cutter discs arranged in pairs on the left and right rotate in opposite directions when working, and the front ends of the two wheel cutter discs arranged in pairs rotate towards each other to push the debris cut by the wheel cutter discs to the middle position of the tunnel bottom wall.

[0027] Beneficial effect: The two wheel cutter discs rotate in opposite directions when working, and the front ends of the two wheel cutter discs rotate towards each other to push the debris cut by the wheel cutter discs to the gap between the two wheel cutter discs, that is, to push the debris to the middle position of the tunnel bottom wall, so as to achieve intermediate debris collection.

[0028] Furthermore, the cutter disc mounting seat is mounted on the guide sleeve through the up and down guiding movement of the lifting cylinder, and the lifting cylinder constitutes the mounting seat driving mechanism. There are multiple lifting cylinders and they are evenly distributed on the cutter disc mounting seat.

[0029] Beneficial effect: the cutter disc mounting seat is installed on the guide sleeve by means of a lifting cylinder, the structure is simple and easy to install. In addition, a plurality of lifting cylinders are evenly distributed on the cutter disc mounting seat, making the up and down movement of the cutter disc mounting seat more stable.

[0030] Furthermore, a guide groove extending forward and backward is provided on the main beam, a pulley is installed on the guide sleeve, and the guide sleeve is installed on the main beam by being guided and moved forward and backward by the pulley.

[0031] Beneficial effect: A matching structure of a guide groove and a pulley is adopted between the main beam and the guide sleeve to realize the forward and backward guiding movement of the guide sleeve and to install it on the main beam, which has a simple structure and is easy to install.

[0032] Furthermore, the towing connection structure is a towing cylinder capable of towing the special-shaped tunnel excavation device forward.

[0033] Beneficial effect: The towing connection structure drags the special-shaped tunnel excavation device forward through the towing cylinder, so that the towing special-shaped tunnel excavation device and the main machine can move synchronously, and can also move in steps in sequence, making the control of the special-shaped tunnel excavation device more flexible.

[0034] The technical solution of the special-shaped tunnel boring machine of the present invention is:

[0035] The special-shaped tunnel boring machine comprises a main machine, a special-shaped tunnel excavation device connected to the rear side of the main machine, and a slag collecting device for collecting and transporting slag generated by the special-shaped tunnel excavation device backwards. The front end of the main machine is provided with a main excavation cutter disc for excavating a circular cross-section tunnel. The special-shaped tunnel excavation device comprises a main beam extending forward and backward, and a first supporting device and a second supporting device are arranged on the main beam at intervals in front and back. The first supporting device and the second supporting device both comprise support shoes for tightening the inner wall of the tunnel, and at least one of the first supporting device and the second supporting device further comprises a sliding shoe, which is used for sliding support on the bottom wall of the tunnel. The first supporting device or the main beam is provided with a support shoe for contacting with the towing A towing connection structure connected to the pulling equipment; a guide sleeve is installed on the main beam for front and rear guiding movement, the guide sleeve is between the first supporting device and the second supporting device, the guide sleeve is connected to a cutterhead mounting seat, a wheel cutterhead is rotatably installed on the cutterhead mounting seat, and the wheel cutterhead is used for secondary excavation of the tunnel; the special-shaped tunnel excavation device also includes a telescopic drive mechanism, one end of the telescopic drive mechanism is connected to the first supporting device or the second supporting device, and the other end is connected to the cutterhead mounting seat or the guide sleeve, which is used to drive the wheel cutterhead to move forward; the special-shaped tunnel excavation device is connected to the main machine through the towing connection structure so that the main machine can drive the special-shaped tunnel excavation device to move forward.

[0036] Beneficial effects: The special-shaped tunnel boring machine of the present invention is supported on the bottom wall of the tunnel by sliding shoes, so that the entire special-shaped tunnel excavation device can walk independently, that is, it can exist independently; and the first supporting device is provided with a towing connection structure for connecting with the towing equipment, so that the special-shaped tunnel excavation device can be mounted on the existing shield machine, and can also be connected with other towing equipment (such as locomotives, winches, etc.), so that it can not only meet the needs of the first excavation and forming of the special-shaped cross-section tunnel, but also independently carry out the secondary excavation of the formed circular cross-section tunnel, and the use flexibility is higher. In addition, the first supporting device and the second supporting device are provided with support shoes for tightening on the inner wall of the tunnel. When the support shoes are tightened on the inner wall of the circular cross-section tunnel, the first and second supporting devices and the main beam can be kept fixed, and the wheeled cutter head can move under the drive of the telescopic driving mechanism to realize the secondary excavation of the circular cross-section tunnel. The present invention only uses the main beam and the guide sleeve as a set of sliding assembly structures for excavation, and the structure is relatively simple, and the control is more convenient, which can not only reduce the cost, but also simplify the construction operation and improve the construction efficiency.

[0037] Furthermore, the sliding shoe is located at the front side of the wheel cutter disc and at the bottom of the first supporting device, the second supporting device is supported and cooperated with the inner wall of the tunnel only through the supporting shoe, and a slag collecting space is formed under the second supporting device for the slag collecting device to extend into.

[0038] Beneficial effects: This arrangement makes the arrangement of the first supporting device and the second supporting device relatively simple, and the arrangement of the slag collecting space below the second supporting device facilitates the removal of the slag cut off by the wheel cutter disc.

[0039] Furthermore, the telescopic drive mechanism is located at the front side of the wheel cutter disc, and one end of the telescopic drive mechanism is connected to the first supporting device.

[0040] Beneficial effect: Compared with setting the telescopic drive mechanism on the second support device, the telescopic drive mechanism is connected to the first support device, so that the second support device can be shorter in the vertical direction, and the overall structure of the second support device is simpler and easier to process.

[0041] Further, the first supporting device includes a first supporting seat, the support shoes on the first supporting device are first supporting device support shoes, at least two groups of first supporting device support shoes are arranged at intervals in front and behind, at least two first supporting device support shoes are arranged in the same group, and the first supporting device support shoes in the same group are arranged at intervals along the circumference of the first supporting seat.

[0042] Beneficial effect: The support shoes of the first supporting device are arranged with at least two groups spaced apart from each other, so that the support shoes of the first supporting device have a better tightening effect on the inner wall of the tunnel and can provide a sufficiently large supporting force.

[0043] Further, the first support device gripper shoe comprises a shoe body and a gripper shoe cylinder, at least two gripper shoe cylinders are arranged on the first support device gripper shoe, and the gripper shoe cylinders on the first support device gripper shoe are arranged at intervals along the circumferential direction of the first support seat.

[0044] Beneficial effect: The support shoe cylinders are arranged at intervals along the circumference of the first support seat, so that the spacing between two adjacent groups of first support device support shoes is smaller, thereby making the size of the first support seat along the front-to-back direction smaller, and the overall structure of the special-shaped tunnel excavation device is more compact.

[0045] Furthermore, the first supporting device includes a first supporting seat, a constant-pressure floating supporting structure is arranged at the bottom of the first supporting seat, and the sliding shoe is installed at the bottom of the constant-pressure floating supporting structure.

[0046] Beneficial effects: By adjusting the constant pressure floating support structure, the sliding shoe is always pressed against the inner wall of the tunnel to prevent the main beam from tilting. In addition, when the special-shaped tunnel excavation device is in the process of uphill or downhill or small curve excavation, when there is a pressure change between the main beam and the guide sleeve, the sliding shoe can move up and down to ensure the smooth sliding of the main beam in the guide sleeve to avoid jamming.

[0047] Furthermore, the rotation axis of the wheel cutter disc extends in the vertical direction.

[0048] Beneficial effects: The rotation axis of the wheel cutter disc extends in the vertical direction, so that the excavation width of the wheel cutter disc is larger and the bottom wall of the tunnel excavated by the wheel cutter disc is smoother.

[0049] Furthermore, the cutter disc mounting seat is movably mounted on the guide sleeve for up and down guides, the wheel cutter discs arranged in pairs on the left and right are mounted on the same cutter disc mounting seat, and a mounting seat driving mechanism is connected between the guide sleeve and the cutter disc mounting seat, and the mounting seat driving mechanism is used to drive the cutter disc mounting seat to move up and down.

[0050] Beneficial effect: The mounting seat driving mechanism drives the cutter disc mounting seat to move up and down, so that the wheel cutter disc can move up and down, thereby enabling the wheel cutter disc to better perform secondary excavation on the circular cross-section tunnel.

[0051] Furthermore, a telescopic sleeve is provided at the bottom of the guide sleeve, and the telescopic sleeve comprises a main cylinder body fixed to the guide sleeve and a secondary cylinder body fixed to the cutter disc mounting seat, and the secondary cylinder body is slidably and circumferentially assembled inside the main cylinder body so that the cutter disc mounting seat can deflect relative to the guide sleeve.

[0052] Beneficial effect: The cutterhead mounting seat can be deflected relative to the guide sleeve, so that the wheel cutterhead can meet the needs of small curve construction, thereby making the special-shaped tunnel excavation device more adaptable.

[0053] Furthermore, the wheel cutter discs arranged in pairs on the left and right rotate in opposite directions when working, and the front ends of the two wheel cutter discs arranged in pairs rotate towards each other to push the debris cut by the wheel cutter discs to the middle position of the tunnel bottom wall.

[0054] Beneficial effect: The two wheel cutter discs rotate in opposite directions when working, and the front ends of the two wheel cutter discs rotate towards each other to push the debris cut by the wheel cutter discs to the gap between the two wheel cutter discs, that is, to push the debris to the middle position of the tunnel bottom wall, so as to achieve intermediate debris collection.

[0055] Furthermore, the cutter disc mounting seat is mounted on the guide sleeve through the up and down guiding movement of the lifting cylinder, and the lifting cylinder constitutes the mounting seat driving mechanism. There are multiple lifting cylinders and they are evenly distributed on the cutter disc mounting seat.

[0056] Beneficial effect: the cutter disc mounting seat is installed on the guide sleeve by means of a lifting cylinder, the structure is simple and easy to install. In addition, a plurality of lifting cylinders are evenly distributed on the cutter disc mounting seat, making the up and down movement of the cutter disc mounting seat more stable.

[0057] Furthermore, a guide groove extending forward and backward is provided on the main beam, a pulley is installed on the guide sleeve, and the guide sleeve is installed on the main beam by being guided and moved forward and backward by the pulley.

[0058] Beneficial effect: A matching structure of a guide groove and a pulley is adopted between the main beam and the guide sleeve to realize the forward and backward guiding movement of the guide sleeve and to install it on the main beam, which has a simple structure and is easy to install.

[0059] Furthermore, the towing connection structure is a towing cylinder capable of towing the special-shaped tunnel excavation device forward.

[0060] Beneficial effect: The towing connection structure drags the special-shaped tunnel excavation device forward through the towing cylinder, so that the towing special-shaped tunnel excavation device and the main machine can move synchronously, and can also move in steps in sequence, making the control of the special-shaped tunnel excavation device more flexible.

[0061] Furthermore, the slag collecting device comprises a scraper conveyor for conveying the slag backwards and a bucket arranged at the front end of the scraper conveyor, wherein the bucket is provided with a material pushing wheel for pushing the slag toward the scraper conveyor.

[0062] Beneficial effects: The slag collecting device adopts this structural setting, which has a simple structure and is easy to install.

[0063] Furthermore, the special-shaped tunnel boring machine comprises a slag collecting device trailer, the slag collecting device is arranged on the slag collecting device trailer, and the slag collecting device trailer is connected to the guide sleeve so that the slag collecting device can move synchronously with the wheel cutter head.

[0064] Beneficial effect: The slag collecting device and the wheel cutter disc move synchronously, so that the slag collecting device can promptly transport away the slag cut by the wheel cutter disc, achieving real-time slag discharge.

[0065] Furthermore, the slag collecting device trailer is connected to the guide sleeve via a drag adjusting mechanism, and the drag adjusting mechanism can drag the slag collecting device trailer forward.

[0066] Beneficial effects: The dragging adjustment mechanism can drag the slag collecting device trailer forward according to the on-site conditions, and adjust the distance between the wheel cutter head and the slag collecting device trailer, which is easy to install and can better adapt to different working environments.

[0067] Furthermore, the bottom of the slag collecting device trailer is provided with a trailer sliding shoe for sliding on the bottom wall of the tunnel.

[0068] Beneficial effect: the slag collecting device trailer can slide forward through the trailer sliding shoe, so that the slag collecting device closely follows the wheel cutter disc, and the slag collecting device can collect slag more timely.

[0069] Furthermore, the main machine is provided with a main machine conveying device for conveying the debris excavated by the main excavation cutter disc backwards, and the special-shaped tunnel excavation device includes a transfer conveying device for receiving the main machine conveying device, and the transfer conveying device is used to convey the debris of the main machine conveying device to the slag collecting device, and the slag collecting device conveys the debris generated by the special-shaped tunnel excavation device and the debris excavated by the main excavation cutter disc backwards together.

[0070] Beneficial effect: The slag collecting device can transport the slag generated by the special-shaped tunnel excavation device and the slag excavated by the main excavation cutter disc backward together, which can simplify the structure of the conveying device, facilitate the adjustment of the position between adjacent conveying devices, and improve flexibility.

[0071] Furthermore, the special-shaped tunnel boring machine includes a slag collecting device trailer, the slag collecting device is arranged on the slag collecting device trailer, and the slag collecting device trailer is connected to the main beam or the second supporting device through a traction synchronous drive mechanism. The traction synchronous drive mechanism is used to drive the slag collecting device trailer forward when the telescopic drive mechanism drives the wheel cutter head to move forward, so that the slag collecting device can move synchronously with the wheel cutter head.

[0072] Beneficial effects: the slag collecting device and the wheel cutter disc can move synchronously, the slag can be cleaned up in time, and the slag collecting device can move in sequence step by step, making the control of the slag collecting device more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 It is a schematic diagram of the overall structure of the special-shaped tunnel boring machine embodiment 1 of the present invention;

[0074] Figure 2 It is a partial structural schematic diagram of the special-shaped tunnel boring machine embodiment 1 of the present invention;

[0075] Figure 3 yes Figure 1 Sectional view at AA in the middle;

[0076] Figure 4 yes Figure 1 Sectional view at the middle BB;

[0077] Figure 5 yes Figure 1 Sectional view at CC;

[0078] Figure 6 yes Figure 1 Sectional view at DD in the middle;

[0079] Figure 7 is a top view of the slag collecting device in Embodiment 1 of the special-shaped tunnel boring machine of the present invention;

[0080] Figure 8 It is a cross-section diagram of a circular cross-section tunnel;

[0081] Fig. 9 It is a cross-sectional view of a tunnel with a portal-shaped cross-section.

[0082] Description of the accompanying drawings: 1. Main excavation device; 2. Main propulsion device; 3. Main drive device; 4. Main support shoe; 5. Main excavation cutter disc; 6. Main beam; 7. First support device; 8. Second support device; 9. Guide sleeve; 10. Wheel cutter disc; 11. First support seat; 12. First support device support shoe; 13. Shoe body; 14. Support shoe cylinder; 15. Support device sliding shoe; 16. Plate body; 17. Sliding column; 18. Constant pressure floating support structure; 19. Step-changing cylinder; 20. Second support seat; 21. Second support device support shoe; 22. Pulley; 23. Cutter disc mounting seat; 24. Trailer slide; 25. Lifting cylinder; 26. Telescopic sleeve; 27. Main cylinder; 28. Auxiliary cylinder; 29. ​​Main engine beam; 30. Cutter drive cylinder; 31. Main engine belt conveyor; 32. Transfer belt conveyor; 33. Scraper conveyor; 34. Rear supporting belt conveyor; 35. Slag collection device trailer; 36. Rear supporting trailer; 37. Bucket; 38. Feeding wheel; 381. Disc; 382. Feeding tooth; 39. Conveyor push cylinder; 40. Travel wheel; 41. Drag adjustment cylinder; 42. Front connecting plate; 43. Rear connecting plate; 100. Circular section tunnel; 200. Doorway section tunnel. DETAILED DESCRIPTION

[0083] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0084] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0085] It should be noted that, in the specific implementation of the present invention, the terms that may appear, such as "first" and "second", etc., are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of such an actual relationship or order between these entities or operations. Moreover, the terms that may appear, such as "include", "comprise" or any other variants thereof, are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the phrase "including a ..." and other defined elements that may appear do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0086] In the description of the present invention, unless otherwise clearly specified and limited, the terms that may appear, such as "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0087] In the description of the present invention, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] The present invention is described in further detail below in conjunction with embodiments.

[0089] Embodiment 1 of the special-shaped tunnel boring machine provided in the present invention:

[0090] like Figures 1 to 7 As shown, the special-shaped tunnel boring machine includes a main machine and a special-shaped tunnel excavation device connected to the rear side of the main machine. The main machine is used to excavate Figure 8 The circular cross-section tunnel 100 shown in the figure is a traction device for driving the special-shaped tunnel excavation device to move forward. The special-shaped tunnel excavation device is used to perform secondary excavation on the circular cross-section tunnel 100 excavated by the main machine to form a Fig. 9 The tunnel 200 with a portal-shaped cross section is shown.

[0091] The main machine includes a main machine excavation device 1, a main machine propulsion device 2, a main machine drive device 3, a main machine gripper 4 and a main machine beam 29. The main machine excavation device 1 includes a main excavation cutter disc 5. The main excavation cutter disc 5 performs a circular motion to excavate a circular cross-section tunnel 100. The main machine drive device 3 serves as a power source for the main excavation cutter disc 5 to drive the main excavation cutter disc 5 to rotate. The main machine propulsion device 2 is used to drive the main excavation cutter disc 5 to move forward. In this embodiment, the main machine propulsion device 2 is a main machine propulsion oil cylinder. When the piston rod of the main machine propulsion oil cylinder is extended, the main excavation cutter disc 5 is driven to move forward. The main machine gripper 4 is used to press against the inner wall of the tunnel to provide a reaction force for the main machine propulsion device 2 so that the main excavation cutter disc 5 can move forward.

[0092] The special-shaped tunnel excavation device includes a main beam 6 extending forward and backward, a first supporting device 7 and a second supporting device 8 are arranged on the main beam 6 at intervals in front and back, and a guide sleeve 9 is arranged between the first supporting device 7 and the second supporting device 8. The guide sleeve 9 is installed on the main beam 6 for forward and backward guiding movement. A cutter head mounting seat 23 is connected to the guide sleeve 9, and a wheel cutter head 10 is rotatably mounted on the cutter head mounting seat 23. The wheel cutter head 10 performs circular motion for secondary excavation of a circular cross-section tunnel 100 to form a portal-shaped cross-section tunnel 200.

[0093] The first support device 7 includes a first support seat 11 and a first support device gripper shoe 12 arranged on the first support seat 11 for tightening the inner wall of the tunnel. The first support seat 11 is fixed to the main beam 6 and the main beam 6 passes through the first support seat 11. There are two groups of first support device grippers 12, and the two groups of first support device grippers 12 are arranged on the first support seat 11 at intervals in front and back. Each group of first support device grippers 12 has two, and the two first support device grippers 12 in each group are arranged at intervals along the circumference of the first support seat 11. The tightening direction of one of the two first support device grippers 12 located on the front side is left obliquely upward, and the tightening direction of the other is right obliquely upward. The tightening direction of one of the two first support device grippers 12 located on the rear side is left obliquely downward, and the tightening direction of the other is right obliquely downward. The tightening effect of the four first support device grippers 12 using this layout is better. More specifically, the first support device gripper 12 includes a shoe body 13 and a gripper cylinder 14. The piston rod of the gripper cylinder 14 moves the shoe body 13 when it is extended and retracted, so that the first support device gripper 12 is pressed against the inner wall of the tunnel or away from the inner wall of the tunnel. In this embodiment, each first support device gripper 12 has two gripper cylinders 14, and the two gripper cylinders 14 are arranged at intervals along the circumference of the first support seat 11. The gripper cylinders 14 are arranged at intervals along the circumference of the first support seat 11 so that the distance between the front and rear groups of the first support device grippers 12 is small, so that the dimension of the first support seat 11 along the front-to-back direction is short, and thus the overall structure of the special-shaped tunnel excavation device is more compact.

[0094] A support device shoe 15 is provided at the bottom of the first support seat 11, and the support device shoe 15 is used for sliding support on the bottom wall of the tunnel. The support device shoe 15 includes a plate body 16 extending forward and backward and a sliding column 17 located on the left and right sides of the plate body 16, and the sliding column 17 extends forward and backward and is used to contact the bottom wall of the tunnel. In addition, a constant pressure floating support structure 18 is provided at the bottom of the first support seat 11, and the support device shoe 15 is installed at the bottom of the constant pressure floating support structure 18. In this embodiment, the constant pressure floating support structure 18 includes a constant pressure oil cylinder and a spring sleeved outside the constant pressure oil cylinder. In other embodiments, the constant pressure floating support structure can also adopt the wheelset floating support device disclosed in patent document CN209324356U. By adjusting the constant pressure floating support structure 18, the support device shoe 15 is always pressed against the inner wall of the tunnel to avoid the main beam 6 from being skewed. In addition, when the special-shaped tunnel excavation device is in the process of excavating uphill or downhill or small curves, when there is a pressure change between the main beam 3 and the guide sleeve 9, the support device slipper 15 and the first support seat 11 can move up and down relative to each other to ensure the smooth sliding of the main beam 3 in the guide sleeve 9 to avoid jamming.

[0095] The front side of the first support seat 11 is provided with a drag connection structure for connecting with a push-pull device, that is, a drag connection structure connected with the main frame beam body 29 of the main frame. Specifically, the drag connection structure includes a step-changing cylinder 19, the front end of which is hinged to the main frame beam body 29, and the rear end of which is hinged to the first support seat 11. In other embodiments, the step-changing cylinder can be replaced by a cylinder, an electric push rod, or a screw nut mechanism.

[0096] The second supporting device 8 includes a second supporting seat 20 and a second supporting device shoe 21 disposed on the second supporting seat 20 for tightening against the inner wall of the tunnel. The second supporting seat 20 is fixed to the main beam 6 and the main beam 6 passes through the second supporting seat 20. There are two second supporting device shoes 21 and they are arranged symmetrically. The structure of the second supporting device shoe 21 is the same as that of the first supporting device shoe 12, and will not be repeated here.

[0097] like Figure 4 As shown, the cross section of the guide sleeve 9 is a rectangular ring, and its internal passage is for the main beam 6 to pass through. Pulleys 22 are installed on the left and right inner sides of the guide sleeve 9, and correspondingly, a guide groove extending forward and backward is provided on the main beam 6. The pulley 22 is installed in the guide groove and can roll forward and backward in the guide groove to realize the guide sleeve 9 to be installed on the main beam 6 while being guided and moved forward and backward.

[0098] A cutterhead mounting seat 23 is movably mounted on the guide sleeve 9 in an up-and-down guiding manner. There are two wheel cutterheads 10, which are arranged in pairs on the left and right sides and mounted on the lower side of the cutterhead mounting seat 23. The rotation axes of the two wheel cutterheads 10 extend in the vertical direction. This arrangement allows the two wheel cutterheads 10 to be placed horizontally, and the two wheel cutterheads 10 are hoisted on the lower side of the cutterhead mounting seat 23, so that the wheel cutterheads 10 and the cutterhead mounting seat 23 are arranged in the up-and-down direction. The installation space of the cutterhead mounting seat 23 is large, and the cutterhead mounting seat 23 is not easy to interfere when installing, which facilitates the installation of the cutterhead mounting seat 23. It should be noted that the two wheel cutterheads 10 rotate in opposite directions when working, and the front ends of the two wheel cutterheads 10 rotate toward each other to push the slag cut by the wheel cutterheads 10 to the gap between the two wheel cutterheads 10, that is, to push the slag to the middle position of the tunnel bottom wall, so as to achieve intermediate slag collection.

[0099] In addition, a mounting seat driving mechanism for driving the cutter disc mounting seat 23 to move up and down is connected between the guide sleeve 9 and the cutter disc mounting seat 23. Specifically, a lifting cylinder 25 is connected to the left and right outer sides of the guide sleeve 9, and the lower end of the lifting cylinder 25 is connected to the cutter disc mounting seat 23. The lifting cylinder 25 constitutes a mounting seat driving mechanism, and the telescopic movement of the piston rod of the lifting cylinder 25 can drive the cutter disc mounting seat 23 to move up and down, thereby realizing the up and down movement of the wheel cutter disc 10. In other embodiments, the lifting cylinder can be replaced by a cylinder, an electric push rod, or a screw nut mechanism. By adjusting the up and down position of the wheel cutter disc 10, the excavation depth of the wheel cutter disc 10 in the vertical direction can be adjusted to meet the needs of different excavation sections.

[0100] In this embodiment, there are four lifting cylinders 25, two of which are located on the left side of the guide sleeve 9, and the other two are located on the right side of the guide sleeve 9, and the four lifting cylinders 25 are evenly distributed on the cutter head mounting seat 23. With this layout of the lifting cylinders 25, the wheel cutter head 10 is more stable during the up and down movement.

[0101] A telescopic sleeve 26 is provided at the bottom of the guide sleeve 9. The telescopic sleeve 26 includes a main cylinder 27 fixed to the guide sleeve 9 and a sub-cylinder 28 fixed to the cutterhead mounting seat 23. The sub-cylinder 28 slides up and down and is assembled in the main cylinder 27 in a circumferential rotation, that is, the sub-cylinder 28 can move up and down in the main cylinder 27 and can rotate in the main cylinder 27. When the lifting cylinder 25 lifts the cutterhead mounting seat 23 upward, the main cylinder 27 and the sub-cylinder 28 guide the cutterhead mounting seat 23 to prevent the cutterhead mounting seat 23 from tilting during the up and down movement. In addition, the cutterhead mounting seat 23 can be deflected left and right relative to the guide sleeve 9 to a certain extent through the telescopic sleeve 26, so that the wheeled cutterhead 10 can meet the construction of small curves, thereby making the special-shaped tunnel excavation device more adaptable.

[0102] The special-shaped tunnel excavation device also includes a telescopic drive mechanism, which is used to drive the wheel cutter head 10 to move forward. In this embodiment, the telescopic drive mechanism is a cutter head drive cylinder 30, and two cutter head drive cylinders 30 are arranged on the left and right. The front end of the cutter head drive cylinder 30 is connected to the first support seat 11, and the rear end is connected to the cutter head mounting seat 23. The cutter head drive cylinder 30 can drive the wheel cutter head 10 to move forward to realize the excavation action of the wheel cutter head 10. In other embodiments, the cutter head drive cylinder can be replaced by a cylinder, an electric push rod, or a screw nut mechanism.

[0103] The special-shaped tunnel boring machine also includes a slag discharge system for conveying slag from front to back, and the slag discharge system includes a main machine belt conveyor 31, a transfer belt conveyor 32, a slag collection device and a rear matching belt conveyor 34. The main machine belt conveyor 31 is used to convey the slag cut by the main excavation cutter 5 from front to back, and the transfer belt conveyor 32 is arranged on the main beam 6, and is used to continue to convey the slag conveyed by the main machine belt conveyor 31 to the rear. The slag collection device includes a scraper conveyor 33, which is arranged on a slag collection device trailer 35, and a rear matching belt conveyor 34 is arranged on a rear matching trailer 36. The slag conveyed backward by the transfer belt conveyor 32 is conveyed to the scraper conveyor 33, and then conveyed to the rear matching belt conveyor 34 by the scraper conveyor 33, and then conveyed to the slag truck or tunnel belt conveyor by the rear matching belt conveyor 34, and finally transported to the outside of the tunnel by the slag truck or tunnel belt conveyor to realize slag discharge. The main machine belt conveyor 31 constitutes a main machine conveying device on the main machine for conveying the excavated soil by the main excavation cutter disc 5 backwards, and the transfer belt conveyor 32 constitutes a transfer conveying device for taking over the main machine conveying device.

[0104] The slag collecting device also includes a bucket 37 arranged at the front end of the scraper conveyor 33. The bucket 37 is provided with two left and right arranged material-discharging wheels 38. The material-discharging wheels 38 include a disc body 381 and material-discharging teeth 382 arranged around the disc body 381. The material-discharging wheels 38 rotate under the drive of the motor. The rotating material-discharging wheels 38 push the slag cut off by the wheel cutter disc 10 to the scraper conveyor 33 through the material-discharging teeth 382. The scraper conveyor 33 then transports the slag removed by the material-discharging wheels 38 backwards.

[0105] It should be noted that a slag collecting space is formed on the lower side of the second supporting device 8 for the slag collecting device to extend into. The slag collecting space is located in the middle of the tunnel. The slag cut off by the wheel cutter disc 10 is pushed onto the tunnel bottom wall of the slag collecting space. The scraper conveyor 33 is arranged to gradually rise from front to back so that the front end of the scraper conveyor 33 can extend into the slag collecting space to transport the slag cut off by the wheel cutter disc 10, thereby realizing the intermediate slag collection of the slag.

[0106] The front end of the scraper conveyor 33 is hinged to the slag collecting device trailer 35, and a conveyor pushing cylinder 39 is provided at the rear end. One end of the conveyor pushing cylinder 39 is hinged to the scraper conveyor 33, and the other end is hinged to the slag collecting device trailer 35. The inclination angle of the scraper conveyor 33 can be adjusted by controlling the extension and contraction amount of the piston rod of the conveyor pushing cylinder 39.

[0107] The slag collecting device trailer 35 is connected to the guide sleeve 9 through a drag adjustment mechanism. In this embodiment, the drag adjustment mechanism is a drag adjustment cylinder 41. The front end of the drag adjustment cylinder 41 is hinged on the guide sleeve 9, and the rear end of the drag adjustment cylinder 41 is hinged on the slag collecting device trailer 35. In other embodiments, the drag adjustment mechanism can also be a cylinder, a screw nut mechanism, etc. When the wheel cutter disc excavates forward, when the wheel cutter disc 10 excavates forward, the wheel cutter disc 10 will drive the guide sleeve 9 to move forward, and the guide sleeve 9 pulls the slag collecting device trailer 35 forward through the drag adjustment cylinder 41, so that the scraper conveyor 33 and the wheel cutter disc 10 can achieve synchronous action, so that the scraper conveyor 33 can promptly transport the slag cut off by the wheel cutter disc 10, so as to achieve real-time slag discharge. Of course, when the drag adjustment oil cylinder 41 is in the pressure relief state, the piston rod of the drag adjustment oil cylinder 41 can be freely extended and retracted in the cylinder body of the drag adjustment oil cylinder 41, and the wheeled cutter disc 10 can first dig forward, and the slag collecting device trailer 35 remains in place, and then the drag adjustment oil cylinder 41 is controlled to drag the slag collecting device trailer 35 forward to realize the step-by-step action of the wheeled cutter disc 10 and the scraper conveyor 33. At this time, the scraper conveyor 33 then transports the slag cut off by the wheeled cutter disc 10. In addition, the drag adjustment mechanism can also be used to adjust the distance between the scraper conveyor 33 and the wheeled cutter disc 10 for easy installation, and it can also be applied to more working conditions.

[0108] The bottom of the slag collecting device trailer 35 is provided with a trailer shoe 24, through which the slag collecting device trailer 35 can slide forward. The structure of the trailer shoe 24 is the same as the structure of the support device shoe 15 at the bottom of the first support device 7, and will not be described in detail here. The bottom of the rear supporting trailer 36 is provided with a running wheel 40, and the running wheel 40 is located on a track laid on the bottom wall of the tunnel. The slag collecting device trailer 35 is connected to the rear supporting trailer 36 through an articulated connection structure. Specifically, the rear end of the slag collecting device trailer 35 is hinged with a front connecting plate 42, and the front end of the rear supporting trailer 36 is hinged with a rear connecting plate 43, and the front connecting plate 42 and the rear connecting plate 43 are hinged to each other.

[0109] The working process of the special-shaped tunnel boring machine of the present invention is as follows:

[0110] Excavation process: The main excavation cutter disc 5 of the main machine excavates the circular cross-section tunnel 100 at the front. The main machine gripper shoe 4 presses against the inner wall of the tunnel, one end of the main machine propulsion device 2 presses against the main machine gripper shoe 4, and the other end presses against the main machine excavation device 1, pushing the main machine excavation device 1 forward, and the main machine driving device 3 drives the main excavation cutter disc 5 to rotate, thereby realizing the excavation of the circular cross-section tunnel 100.

[0111] The special-shaped tunnel excavation device performs secondary excavation on the circular cross-section tunnel 100 excavated by the main machine at the rear to excavate the circular cross-section tunnel 100 into a portal-shaped cross-section tunnel 200. The special-shaped tunnel excavation device and the main machine work synchronously. The first support device gripper 12 and the second support device gripper 21 press against the inner wall of the tunnel, and the wheel cutter head 10 rotates under the drive of the wheel cutter head drive motor, and the wheel cutter head 10 moves forward under the drive of the cutter head drive cylinder 30, thereby realizing the excavation of the portal-shaped cross-section tunnel 200.

[0112] Slag discharge process: before the main machine and the special-shaped tunnel excavation device start excavation, the main machine belt conveyor 31, the transfer belt conveyor 32, the scraper conveyor 33 and the rear supporting belt conveyor 34 of the slag discharge system are started step by step from back to front. The main machine belt conveyor 31 conveys the slag cut by the main excavation cutter disc 5 from front to back, the transfer belt conveyor 32 continues to convey the slag transported by the main machine belt conveyor 31 backward, the scraper conveyor 33 conveys the slag transported by the transfer belt conveyor 32 backward, and the scraper conveyor 33 collects the slag cut by the wheel cutter disc 10 and conveys it backward, and the rear supporting belt conveyor 34 conveys the slag transported by the scraper conveyor 33 backward to the slag truck, and finally it is transported to the outside of the tunnel by the slag truck.

[0113] Step-changing process: After the slag discharge work is completed, the special-shaped tunnel boring machine moves forward as a whole. First, the main engine support shoe 4 is retracted, and the main engine propulsion device 2, that is, the main engine propulsion cylinder, is adjusted to the pressure relief state. The piston rod of the main engine propulsion cylinder can be freely extended and retracted, and the main engine support shoe 4 is moved forward by a step-changing cylinder 19, and then the main engine support shoe 4 is extended to hold the tunnel wall tightly. Then, the first support device gripper 12 and the second support device gripper 21 of the special-shaped tunnel excavation device are fully retracted, the cutter head driving cylinder 30 and the drag adjustment cylinder 41 are adjusted to the pressure relief state, and the special-shaped tunnel excavation device is stepped forward by the step-changing cylinder 19. During this process, the main beam 6 moves forward in the guide sleeve 9. If the slag collecting device trailer 35 moves synchronously with the wheel cutter head 10 when collecting the slag cut by the wheel cutter head 10, then the wheel cutter head 10 and the slag collecting device trailer 35 and the rear supporting trailer 36 remain stationary. If the slag collecting device trailer 35 moves in steps with the wheel cutter head 10 when collecting the slag cut by the wheel cutter head 10, then the drag adjustment cylinder 41 drags the slag collecting device trailer 35 and the rear supporting trailer 36 forward by one stroke. Finally, the first support device gripper 12 and the second support device gripper 21 of the special-shaped tunnel excavation device are fully extended to hold the inner wall of the tunnel, and the next stage of excavation work is continued.

[0114] In summary, the special-shaped tunnel boring machine of the present invention realizes the one-time excavation and forming of the special-shaped cross-section tunnel, and the special-shaped tunnel excavation device only performs excavation through a set of sliding assembly structures of the main beam 6 and the guide sleeve 9. The wheel cutter head 10 is directly connected to the guide sleeve 9 through the cutter head mounting seat 23. The structure is relatively simple and the control is more convenient. It can not only reduce costs, but also simplify construction operations and improve construction efficiency.

[0115] Embodiment 2 of the special-shaped tunnel boring machine of the present invention is different from embodiment 1 in that the front end of the step-changing cylinder is hinged to the main beam body, and the rear end is hinged to the main beam.

[0116] Embodiment 3 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that both the first supporting device and the second supporting device include supporting device sliding shoes, and the plate body of the supporting device sliding shoe of the second supporting device is an arc-shaped plate to form a slag collecting space on the lower side of the plate body for the slag collecting device to extend into. Alternatively, in other embodiments, the supporting device sliding shoe is located at the rear side of the wheel cutter head and on the second supporting device, and the first supporting device is supported and cooperated with the inner wall of the tunnel only through the supporting shoe, and the plate body of the supporting device sliding shoe is an arc-shaped plate to form a slag collecting space on the lower side of the plate body for the slag collecting device to extend into.

[0117] Embodiment 4 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that the cutter disc driving cylinder is located on the rear side of the wheel cutter disc, one end of the cutter disc driving cylinder is connected to the cutter disc mounting seat, and the other end is connected to the second support seat. Compared with the second support seat in Embodiment 1, the second support seat in this embodiment is longer in the vertical direction.

[0118] Embodiment 5 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that the first support device grippers include only one group, the group of first support device grippers has four, and each first support device gripper is arranged at intervals along the circumference of the first support seat. Alternatively, in other embodiments, the first support device grippers may include three groups, four groups or more groups, each group is arranged at intervals in front and back, and the first support device grippers of each group are arranged at intervals along the circumference of the first support seat.

[0119] Embodiment 6 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that the first support device gripper includes a shoe body and a gripper oil cylinder, two gripper oil cylinders are provided on the first support device gripper, and the two gripper oil cylinders on the first support device gripper are arranged axially spaced apart from each other along the first support seat. Alternatively, in other embodiments, the first support device gripper includes a shoe body and a gripper oil cylinder, and one gripper oil cylinder can be provided on the first support device gripper.

[0120] Embodiment 7 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that the first supporting device includes a first supporting seat, and the supporting device sliding shoe is directly fixed to the bottom of the first supporting seat.

[0121] Embodiment 8 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that, in this embodiment, the rotation axes of the two wheel cutter discs extend in the horizontal direction, and the two wheel cutter discs are respectively located on the left and right sides of the guide sleeve, the wheel cutter disc on the left side of the guide sleeve is connected to a cutter disc mounting seat, and the wheel cutter disc on the right side of the guide sleeve is connected to another cutter disc mounting seat, the two cutter disc mounting seats are respectively connected to the guide sleeve through a lifting cylinder, and the two wheel cutter discs can be controlled separately.

[0122] Embodiment 9 of the special-shaped tunnel boring machine of the present invention is different from embodiment 1 in that the cutter head mounting seat is directly fixed to the bottom of the guide sleeve.

[0123] Embodiment 10 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that, in this embodiment, no telescopic sleeve is provided between the guide sleeve and the cutter head mounting seat, and the guide sleeve and the cutter head mounting seat are connected only by a lifting cylinder.

[0124] Embodiment 11 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that two lifting cylinders are provided, the two lifting cylinders are respectively connected to the left and right outer sides of the guide sleeve, and the two lifting cylinders are arranged at diagonally opposite corners of the mounting seat. Alternatively, in other embodiments, the lifting cylinders are divided into two groups, one group is arranged on the left outer side of the guide sleeve, and the other group is arranged on the right outer side of the guide sleeve, and the number of lifting cylinders in each group can be three, four or more.

[0125] Embodiment 12 of the special-shaped tunnel boring machine of the present invention is different from embodiment 1 in that the left and right sides of the main beam are provided with slide grooves extending forward and backward, and correspondingly, the left and right inner side surfaces of the guide sleeve are provided with sliders, which are slidably assembled in the slide grooves to realize the front-back guiding movement of the guide sleeve on the main beam. Alternatively, in other embodiments, the guide sleeve is directly installed on the front-back guiding movement of the main beam through the inner side surface.

[0126] Embodiment 13 of the special-shaped tunnel boring machine of the present invention is different from embodiment 1 in that a mechanical arm is provided at the front end of the scraper conveyor, and the mechanical arm moves to push the debris cut off by the wheel cutter disc to the scraper conveyor.

[0127] Embodiment 14 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that, in this embodiment, the rotation directions of the two wheel cutter discs are opposite, and the front ends of the two wheel cutter discs arranged in pairs on the left and right rotate away from each other to push the debris cut by the wheel cutter discs to the two sides of the tunnel. Therefore, in this embodiment, two scraper conveyors need to be set, one extending to the left side of the tunnel to transport the debris cut by the wheel cutter disc on the left side, and the other extending to the right side of the tunnel to transport the debris cut by the wheel cutter disc on the right side, and both scraper conveyors transport the debris to the rear matching belt conveyor.

[0128] Embodiment 15 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that, in this embodiment, the slag collecting device trailer is connected to the second support seat via a towing cylinder.

[0129] Embodiment 16 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that the slag collecting device trailer is hingedly connected to the guide sleeve. Specifically, a front hinged plate is hingedly connected to the guide sleeve, a rear hinged plate is hingedly connected to the slag collecting device trailer, and the front hinged plate and the rear hinged plate are hingedly connected to each other.

[0130] Embodiment 17 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that the slag collecting device trailer moves forward through the running wheels arranged at the bottom, and the running wheels are located on tracks laid on the bottom wall of the tunnel.

[0131] Embodiment 18 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that, in this embodiment, the main machine belt conveyor extends all the way to the rear supporting conveyor, and the scraper conveyor of the slag collecting device is only used to convey the collected slag to the rear supporting conveyor. Of course, on the basis of this embodiment, the scraper conveyor can also convey the collected slag to the main machine belt conveyor.

[0132] Embodiment 19 of the special-shaped tunnel boring machine of the present invention is different from Embodiment 1 in that, in this embodiment, the slag collecting device trailer is connected to the main beam through a traction synchronous drive mechanism, and the traction synchronous drive mechanism is used to drive the slag collecting device trailer to move forward when the telescopic drive mechanism drives the wheel cutter head to move forward, so that the slag collecting device can move synchronously with the wheel cutter head. The traction synchronous drive mechanism is a traction synchronous oil cylinder. In other embodiments, the traction synchronous drive mechanism can also be a cylinder, a screw nut drive mechanism, etc. In other embodiments, the traction synchronous drive mechanism can also be connected to the second support device.

[0133] In Embodiment 1 of the special-shaped tunnel excavation device of the present invention, the structure of the special-shaped tunnel excavation device is the same as the structure of the special-shaped tunnel excavation device in any embodiment of the special-shaped tunnel boring machine described above, and will not be described in detail here.

[0134] Embodiment 2 of the special-shaped tunnel excavation device of the present invention, in this embodiment, the structure of the special-shaped tunnel excavation device is still the same as the structure of the special-shaped tunnel excavation device in any embodiment of the special-shaped tunnel boring machine mentioned above, except that the special-shaped tunnel excavation device is not mounted on the existing shield machine, but is connected to other traction equipment (such as a locomotive, a winch, etc.), so that the shield machine for excavating a circular cross-section can be used independently to complete the excavation of the circular cross-section tunnel first, and then the special-shaped tunnel excavation device is equipped with other traction equipment to realize the secondary excavation of the circular cross-section tunnel, that is, the special-shaped tunnel excavation device can independently carry out the secondary excavation of the formed circular cross-section tunnel, and has higher flexibility in use.

[0135] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A special-shaped tunnel excavation device, characterized in that: The invention comprises a main beam extending forward and backward, a first supporting device and a second supporting device are arranged on the main beam at intervals in front and back, the first supporting device and the second supporting device both comprise a support shoe for tightening the inner wall of the tunnel, and a support device sliding shoe is arranged at the bottom of the first supporting device, the support device sliding shoe is used for sliding support on the bottom wall of the tunnel, the support device sliding shoe is located at the front side of the wheel cutter disc, the first supporting device comprises a first supporting seat, a constant pressure floating supporting structure is arranged at the bottom of the first supporting seat, the support device sliding shoe is installed at the bottom of the constant pressure floating supporting structure, a towing connection structure for connecting with the towing equipment is arranged on the first supporting device or the main beam; a front and rear guiding movable installation is arranged on the main beam There is a guide sleeve, which is located between the first supporting device and the second supporting device. The guide sleeve is connected to a cutterhead mounting seat, and a wheel cutterhead is rotatably mounted on the cutterhead mounting seat. The wheel cutterhead is used for secondary excavation of the tunnel. The special-shaped tunnel excavation device also includes a telescopic drive mechanism, one end of the telescopic drive mechanism is connected to the first supporting device or the second supporting device, and the other end is connected to the cutterhead mounting seat or the guide sleeve, and is used to drive the wheel cutterhead to move forward, and the rotation axis of the wheel cutterhead extends in the vertical direction. When stepping, all the support shoes are retracted, the telescopic drive mechanism is adjusted to a pressure relief state, and the special-shaped tunnel excavation device is stepped forward by a stroke using a towing device.

2. The special-shaped tunnel excavation device according to claim 1, characterized in that: The second supporting device is supported and matched with the inner wall of the tunnel only through the supporting shoes, and a slag collecting space for the slag collecting device to extend into is formed below the second supporting device.

3. The special-shaped tunnel excavation device according to claim 2, characterized in that: The telescopic driving mechanism is located at the front side of the wheel cutter disc, and one end of the telescopic driving mechanism is connected to the first supporting device.

4. The special-shaped tunnel excavation device according to any one of claims 1 to 3, characterized in that: The first support device includes a first support seat, and the support shoes on the first support device are first support device support shoes. At least two groups of first support device support shoes are arranged at intervals in front and behind, and at least two first support device support shoes are arranged in the same group, and the first support device support shoes in the same group are arranged at intervals along the circumference of the first support seat.

5. The special-shaped tunnel excavation device according to claim 4, characterized in that: The first support device gripper shoe comprises a shoe body and a gripper shoe cylinder. At least two gripper shoe cylinders are arranged on the first support device gripper shoe, and the gripper shoe cylinders on the first support device gripper shoe are arranged at intervals along the circumferential direction of the first support seat.

6. The special-shaped tunnel excavation device according to any one of claims 1 to 3, characterized in that: The cutter disc mounting seat is movably mounted on the guide sleeve for upward and downward guiding. The wheel cutter discs arranged in pairs on the left and right are mounted on the same cutter disc mounting seat. A mounting seat driving mechanism is connected between the guide sleeve and the cutter disc mounting seat. The mounting seat driving mechanism is used to drive the cutter disc mounting seat to move up and down.

7. The special-shaped tunnel excavation device according to claim 6, characterized in that: A telescopic sleeve is arranged at the bottom of the guide sleeve, and the telescopic sleeve comprises a main cylinder body fixed to the guide sleeve and a secondary cylinder body fixed to the cutter disc mounting seat. The secondary cylinder body is slidably and circumferentially assembled inside the main cylinder body so that the cutter disc mounting seat can deflect relative to the guide sleeve.

8. The special-shaped tunnel excavation device according to claim 6, characterized in that: The wheel cutter discs arranged in pairs on the left and right rotate in opposite directions when working, and the front ends of the two wheel cutter discs arranged in pairs rotate towards each other to push the debris cut by the wheel cutter discs to the middle position of the tunnel bottom wall.

9. The special-shaped tunnel excavation device according to claim 6, characterized in that: The cutter disc mounting seat is mounted on the guide sleeve through the up and down guiding movement of the lifting cylinder, the lifting cylinder constitutes the mounting seat driving mechanism, and there are multiple lifting cylinders that are evenly distributed on the cutter disc mounting seat.

10. The special-shaped tunnel excavation device according to any one of claims 1 to 3, characterized in that: A guide groove extending forward and backward is arranged on the main beam, a pulley is installed on the guide sleeve, and the guide sleeve is installed on the main beam by being guided and moved forward and backward by the pulley.

11. The special-shaped tunnel excavation device according to any one of claims 1 to 3, characterized in that: The towing connection structure is a towing cylinder capable of towing the special-shaped tunnel excavation device forward.

12. A special-shaped tunnel boring machine, comprising a main machine, a special-shaped tunnel excavation device connected to the rear side of the main machine, and a slag collecting device for collecting and transporting slag generated by the special-shaped tunnel excavation device backward, wherein the front end of the main machine is provided with a main excavation cutter disc for excavating a circular cross-section tunnel, characterized in that: The special-shaped tunnel excavation device is the special-shaped tunnel excavation device described in any one of claims 1 to 11, and the special-shaped tunnel excavation device is connected to the main machine through a towing connection structure so that the main machine can drive the special-shaped tunnel excavation device to move forward.

13. The special-shaped tunnel boring machine according to claim 12, characterized in that: The slag collecting device comprises a scraper conveyor for conveying the slag backwards and a bucket arranged at the front end of the scraper conveyor, wherein a material-discharging wheel for discharging the slag toward the scraper conveyor is arranged in the bucket.

14. The special-shaped tunnel boring machine according to claim 12, characterized in that: The special-shaped tunnel boring machine comprises a slag collecting device trailer, on which the slag collecting device is arranged, and the slag collecting device trailer is connected to a guide sleeve so that the slag collecting device can move synchronously with the wheel cutter head.

15. The special-shaped tunnel boring machine according to claim 14, characterized in that: The slag collecting device trailer is connected to the guide sleeve through a drag adjusting mechanism, and the drag adjusting mechanism can drag the slag collecting device trailer to move forward.

16. The special-shaped tunnel boring machine according to claim 14, characterized in that: The bottom of the slag collecting device trailer is provided with trailer sliding shoes for sliding on the bottom wall of the tunnel.

17. The special-shaped tunnel boring machine according to any one of claims 12 to 16, characterized in that: The main machine is provided with a main machine conveying device for conveying the debris excavated by the main excavation cutter disc backwards. The special-shaped tunnel excavation device includes a transfer conveying device for receiving the main machine conveying device. The transfer conveying device is used to convey the debris of the main machine conveying device to the slag collecting device. The slag collecting device conveys the debris generated by the special-shaped tunnel excavation device and the debris excavated by the main excavation cutter disc backwards together.

18. The special-shaped tunnel boring machine according to claim 12, characterized in that: The special-shaped tunnel boring machine includes a slag collecting device trailer, on which the slag collecting device is arranged. The slag collecting device trailer is connected to the main beam or the second supporting device through a traction synchronous driving mechanism. The traction synchronous driving mechanism is used to drive the slag collecting device trailer forward when the telescopic driving mechanism drives the wheel cutter head to move forward, so that the slag collecting device can move synchronously with the wheel cutter head.

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