Single-line tunnel lifting device with passing function

Abstract

The application discloses a single-line tunnel lifting device with a passing function, which comprises a main frame capable of moving forward and backward in a tunnel, a lifting platform arranged at the front of the main frame, and a rotating platform arranged at the top of the rear of the main frame, wherein the lifting platform is lifted by a lifting mechanism, when tunnel equipment drives to the lifting platform, and the lifting platform is lifted by the lifting mechanism, a passing space is formed under the lifting platform for the rest of the tunnel equipment to pass; the tunnel equipment lifted by the lifting platform can drive to the rotating platform and be turned by 90 degrees by a rotating assembly for reversing, and a space is left under the rotating platform for the rest of the tunnel equipment to pass. The lifting mechanism is used for lifting the lifting platform, the vehicle on the lifting platform can be lifted to a height, the occupation of the main passage of the tunnel during concrete pouring can be effectively avoided, multi-process parallel operation of the tunnel face excavation, inverted arch construction and secondary lining pouring is realized, the space occupation problem is solved fundamentally, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] This invention belongs to the technical field of tunnel auxiliary equipment, specifically relating to a lifting device for a single-track tunnel with passing function. Background Technology

[0002] In the construction of single-track tunnels for railways and highways, the narrow space and limited clearance within the tunnel make logistics channel management a core challenge restricting construction efficiency. With the promotion of mechanized construction systems, tunnel construction has gradually formed a multi-process parallel operation mode, including face excavation, invert construction, and secondary lining pouring. However, the unique spatial constraints of single-track tunnels make competition for logistics channels between different processes an unavoidable issue.

[0003] For the parallel excavation of the tunnel face and the construction of the invert, a trestle bridge is erected on the invert. During the secondary lining pouring, the concrete mixer trucks and pump trucks need to be fixed in their respective positions, but muck trucks also need to remove slag in front of the construction site. In existing technology, traffic control is implemented, that is, the tunnel passage is temporarily closed during concrete pouring and reopened after pouring is completed. This method cannot fundamentally eliminate the spatial competition between the processes, and the entire road still needs to be closed during concrete pouring, resulting in limited improvement in logistics efficiency. Summary of the Invention

[0004] This invention proposes a lifting device for single-line tunnels with passing function, which can realize the parallel operation of multiple processes such as face excavation, invert construction and secondary lining pouring, fundamentally solving the space occupation problem, thereby improving logistics and construction efficiency.

[0005] Therefore, the technical solution adopted by the present invention is as follows: a lifting device for a single-line tunnel with passing function, including a main frame that can move back and forth in the tunnel, a lifting platform is provided at the front of the main frame, and a rotating platform is provided at the top of the rear. The lifting platform is lifted and lowered by a lifting mechanism. When the tunnel equipment travels to the lifting platform and the lifting platform is lifted by the lifting mechanism, a passing space is created below the lifting platform for other tunnel equipment to pass. After the tunnel equipment is lifted by the lifting platform, it can travel to the rotating platform and can be rotated 90° by a rotating component to change direction. Space is left below the rotating platform for other tunnel equipment to pass.

[0006] As a preferred embodiment of the above scheme, the lifting mechanism includes a lifting motor and at least two horizontally extending support shafts spaced apart below the lifting platform. Both ends of the horizontal support shafts are mounted on mounting seats via pins. The mounting seats are fixed to the nuts of the lead screw and nut mechanism. The lifting motor drives the lead screws in all the lead screw and nut mechanisms to rotate through a transmission mechanism, thereby driving the lifting platform to rise through all the horizontal support shafts.

[0007] In a further preferred embodiment, the transmission mechanism includes several power transmission shafts and several intermediate transmission boxes. Adjacent intermediate transmission boxes are connected to each other and to the lifting motor via power transmission shafts. A coupling is provided between the power transmission shafts and the intermediate transmission boxes. The power transmission shafts are mounted on the main frame via transmission shaft support seats. An intermediate transmission box is provided at the upper end of each screw and nut mechanism, thereby enabling the lifting motor to synchronously drive all screw and nut mechanisms.

[0008] In a further preferred embodiment, the lead screw and nut mechanism includes a vertically arranged lead screw, the upper end of which is connected to an intermediate conveyor box, and a nut is screwed onto the lead screw. The main frame is provided with a column corresponding to each lead screw, and two columns facing each other on the left and right have notches for the nut to slide up and down.

[0009] Further preferred, when there are two lifting motors, arched connecting beams are provided at the left and right ends of the front side of the lifting platform; when there is one lifting motor, a horizontally extending support beam is provided at the front end of the main frame.

[0010] Further preferably, the lifting platform is equipped with platform approach bridges on both the front and rear sides to facilitate the tunnel equipment to travel onto the lifting platform, and the lifting platform is lower than the rotating platform after being lifted by the lifting mechanism. A pump guide bridge is set between the lifting platform and the rotating platform to allow the tunnel equipment to travel from the lifting platform to the rotating platform; the rotating platform is a circular platform that is fitted onto the fixed platform, and the rear side of the main frame is equipped with a winch traction device for pulling the tunnel equipment from the lifting platform to the rotating platform.

[0011] Further preferably, the rotating platform is used for pump truck reversing, and the fixed platform is equipped with a reversing adapter for quickly reversing the pump truck's discharge pipe. The reversing adapter includes a reversing seat on the fixed platform and a reversing pipe for reversing. The upper end of the reversing seat away from the pump truck has two joints arranged side by side, one in front of the other, both of which can connect with the reversing pipe. Each joint is equipped with a pump pipe for pumping concrete. The upper end of the reversing seat near the pump truck has a connecting pipe that can connect with the reversing pipe. The end of the reversing pipe near the connecting pipe has a rotating component for rotating the reversing pipe.

[0012] In a further preferred embodiment, the rotating assembly includes a rotating motor mounted on a reversing seat, a driven sprocket mounted on the reversing tube, a driving sprocket mounted at the output end of the rotating motor, and a connecting chain between the driving sprocket and the driven sprocket.

[0013] Further preferably, the reversing pipe and the connecting pipe, as well as the reversing pipe and the connector, are connected using a flared opening or a flexible hose.

[0014] In a further preferred embodiment, the fixed platform is mounted on the main frame via a support frame, and the rotating component includes a rotary motor mounted below the support frame. The output end of the rotary motor is provided with a drive gear, and a driven gear that can mesh with the drive gear is provided below the rotating platform. When the rotary motor is working, it drives the drive gear to rotate, and the rotation of the rotating platform is achieved through the meshing of the drive gear and the driven gear.

[0015] Further preferably, a support rail is provided below the support frame, and a support wheel that can rotate on the support rail is provided on the bottom surface of the rotating platform.

[0016] Further preferably, the upper outer side of the main frame is equipped with a walking platform and guardrails, and the main frame is also equipped with a ladder that allows access to the walking platform.

[0017] The beneficial effects of this invention are:

[0018] 1) The lifting mechanism enables the lifting of the platform, which can lift vehicles on the platform and effectively avoid the occupation of the main tunnel passage during concrete pouring. It enables the parallel operation of multiple processes such as face excavation, invert arch construction and secondary lining pouring, fundamentally solving the space occupation problem and thus effectively improving construction efficiency. According to feedback after actual implementation, the overall monthly construction efficiency increased from 58m to 77m after the lifting device was configured, an increase of 32.8%.

[0019] 2) The main body of the entire lifting device is easy to move, and when it is moved, it will not affect the normal passage of other road sections. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the present invention. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the rotating platform in the present invention. Figure 1 .

[0023] Figure 4 This is a schematic diagram of the rotating platform in the present invention. Figure 2 .

[0024] Figure 5 This is a schematic diagram of the lifting platform in this invention. Figure 1 (When there are two lifting motors).

[0025] Figure 6 This is a schematic diagram of the lifting platform in this invention. Figure 2 (The lifting motor is set to have one time).

[0026] Reference numerals: 1. Main frame; 2. Lifting platform; 3. Rotating platform; 5. Horizontal support shaft; 6. Pin shaft; 7. Mounting seat; 9. Power transmission shaft; 10. Intermediate transmission box; 11. Coupling; 12. Transmission shaft support seat; 13. Lead screw; 15. Lifting column; 16. Platform approach bridge plate; 17. Fixed platform; 18. Support frame; 19. Reversing seat; 20. Reversing pipe; 21. Joint; 22. Pump pipe; 23. Connecting pipe; 24. Rotating motor; 25. Driven sprocket; 27. Connecting chain; 28. Rotating motor; 29. ​​Drive gear; 30. Driven gear; 31. Support rail; 32. Support wheel; 33. Lifting motor; 34. Pump support bridge; 35. Winch traction device; 36. Walking platform; 37. Guardrail; 38. Ladder; 39. Connecting beam; 40. Support beam. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0028] like Figure 1-6 As shown, a lifting device for a single-track tunnel with passing capability mainly consists of a main frame 1, a lowering platform 2, and a rotating platform 3. The lifting platform 2 is located at the front of the main frame 1 via a lifting mechanism, which can move the lifting platform 2 up and down to achieve lifting. When tunnel equipment travels to the lifting platform 2 and the lifting platform 2 is lifted by the lifting mechanism, passing space is created below the lifting platform 2 for other tunnel equipment to pass.

[0029] The rotating platform 3 is set on the top of the rear of the main frame 1 through a rotating component, and the rotating component is used to drive the tunnel equipment on the rotating platform 3 to rotate 90°. After the tunnel equipment is lifted by the lifting platform 2, it can travel onto the rotating platform 3 and can be rotated 90° by the rotating component to change direction. There is space below the rotating platform 3 for other tunnel equipment to pass through.

[0030] A walking device is provided at the bottom of the main frame to facilitate the movement of the entire device, and lifting outriggers are also provided to facilitate the fixing of the device. The walking device and the lifting outriggers are existing technologies and will not be described in detail here.

[0031] Specifically, the lifting mechanism includes a lifting motor and at least two horizontally extending support shafts 5 spaced apart below the lifting platform 2. Both ends of the horizontal support shafts 5 are mounted on mounting seats 7 via pins 6. The horizontal support shafts are connected to the mounting seats using pins for easy assembly and disassembly. To enable the lifting of the horizontal support shafts, the mounting seats 7 are mounted on the lead screw and nut of the lead screw and nut mechanism. The lifting motor 33 drives the rotation of the lead screws in all lead screw and nut mechanisms via a transmission mechanism.

[0032] To ensure the strength of the lifting platform, it includes a base plate and several crisscrossing reinforcing ribs located beneath the base plate, with each reinforcing rib having a flat side away from the base plate. Three horizontal support shafts are spaced at intervals, one at each end and one in the middle.

[0033] The transmission mechanism includes several power transmission shafts 9 and several intermediate transmission boxes 10. Adjacent intermediate transmission boxes 10 are connected to each other and to the lifting motor 33 via power transmission shafts 9. A coupling 11 is provided between the power transmission shafts 9 and the intermediate transmission boxes 10. The power transmission shafts 9 are mounted on the main frame 1 via transmission shaft support seats 12. An intermediate transmission box 10 is provided at the upper end of each screw nut mechanism.

[0034] The lead screw and nut mechanism includes a vertically arranged lead screw 13, the upper end of which is connected to the intermediate conveyor box 10. A lead screw nut is screwed onto the lead screw 13. A column 15 is provided on the main frame 1 corresponding to each lead screw 13. Two opposing columns 15 have notches for the lead screw nut to slide up and down. The columns not only support the lead screw but also prevent dust accumulation. To ensure the guidance of the lead screw nut's up and down movement, a guide slider that can slide up and down within the column is provided on the mounting base.

[0035] The intermediate transmission box includes three existing technology types: a double-outlet 90° interlaced shaft worm gear mechanism, a double-outlet direct interlaced shaft worm gear mechanism, and a single-outlet direct interlaced shaft worm gear mechanism, which can be selected according to needs. Employing a worm gear self-locking transmission mechanism, the lifting platform and the vehicle it carries will not suddenly drop due to gravity in the event of a power outage or power failure, fundamentally solving the safety hazards of hydraulic lifting solutions.

[0036] To accommodate different types of tunnel equipment, a single lifting motor or two motors can be installed. When a single lifting motor is installed, it is used for lifting conventional equipment such as tank trucks, muck trucks, excavators, and loaders, which are less than 10 meters in length. To prevent the tunnel equipment from sliding off the lifting platform after lifting, a horizontally extending support beam 40 is installed at the front end of the main frame. When two lifting motors are installed, it can be used for lifting equipment exceeding 10 meters in length, such as three-arm drilling rigs and arch frame installation rigs. In this case, an arched connecting beam 39 is installed above the front end of the main frame to facilitate equipment lifting. During lifting, the boom of the extra-long equipment extends into the arch of the connecting beam before being lifted.

[0037] To facilitate the movement of tunnel equipment onto the lifting platform, platform approach bridges 16 are installed on both the front and rear sides of the lifting platform 2. Since the platform approach bridges cause the lifting platform to be lower than the rotating platform when fully extended, a horizontally extending support beam is also installed at the rear end of the main frame of the lifting platform. To further facilitate the movement of tunnel equipment onto the rotating platform, a pump-carrying approach bridge 34 is also provided for moving the pump truck from the lifting platform to the rotating platform. Furthermore, a winch traction device 35 is installed at the rear of the main frame 1 for towing the pump truck from the lifting platform to the rotating platform.

[0038] Preferably, the rotating platform 3 is a circular platform, fitted onto the fixed platform 17, which is mounted on the support frame 18, which in turn is mounted on the main frame 1. Specifically, the rotating assembly includes a rotating motor 28 positioned below the support frame 18. A drive gear 29 is located at the output end of the rotating motor 28, and a driven gear 30 meshing with the drive gear 29 is located below the rotating platform 3. When the rotating motor 28 operates, it drives the drive gear 29 to rotate. The meshing of the drive gear 29 and the driven gear 30 then rotates the rotating platform 3, thereby changing the direction of the tunnel equipment located on the rotating platform 3. To facilitate the rotation of the rotating platform, a support rail 31 is provided below the support frame 18, and support wheels 32 that rotate on the support rail 31 are provided on the bottom surface of the rotating platform 3. These wheels not only support the rotating platform but also reduce friction during rotation.

[0039] Because the rotating platform cannot be raised or lowered, it is often used for parking pump trucks. Furthermore, during tunnel construction, multiple concrete pouring processes need to be completed. To reduce pipe bends and ensure smooth concrete discharge, a reversing adapter is installed on the fixed platform 17 to enable rapid reversing of the pump truck's discharge pipe. The reversing adapter includes a reversing seat 19 mounted on the fixed platform 17 and a reversing pipe 20 for reversing. Two connectors 21, arranged side-by-side and capable of connecting to the reversing pipe 20, are located on the upper end of the reversing seat 19 away from the pump truck. Each connector 21 is equipped with a pump pipe 22 for pumping concrete. A connecting pipe 23, capable of connecting to the reversing pipe 20, is located on the upper end of the reversing seat 19 near the pump truck. A rotating component for rotating the reversing pipe is located on the end of the reversing pipe 20 near the connecting pipe 23.

[0040] Specifically, the rotating assembly includes a rotating motor 24 mounted on the reversing seat 19, a driven sprocket 25 mounted on the reversing tube 20, and a driving sprocket mounted at the output end of the rotating motor 24. A connecting chain 27 is provided between the driving sprocket and the driven sprocket 25. When the rotating motor rotates, it drives the driving sprocket to rotate, thereby achieving the direction of the reversing tube through the driven sprocket.

[0041] To ensure the support of the reversing tube, a bearing is used to mount the reversing tube 20 on the first reversing tube support seat at the end of the reversing tube 20 near the connecting tube 23. A second reversing tube support seat is provided on the reversing seat 19 at the positions corresponding to the two joints to support the reversing tube.

[0042] To facilitate operation of the raised equipment, a walking platform 36 and a guardrail 37 are provided on the outer side of the upper end of the main frame 1, and a ladder 38 is also provided on the main frame 1 to access the walking platform 36.

Claims

1. A lifting device for a single-track tunnel with passing function, comprising a main frame (1) capable of moving back and forth within the tunnel, characterized in that: The main frame (1) is provided with a lifting platform (2) at the front and a rotating platform (3) at the top of the rear. The lifting platform (2) is lifted by a lifting mechanism. When the tunnel equipment travels to the lifting platform (2) and the lifting platform (2) is lifted by the lifting mechanism, a passing space is created below the lifting platform (2) for other tunnel equipment to pass through. After the tunnel equipment is lifted by the lifting platform (2), it can travel to the rotating platform (3) and can be rotated 90° by the rotating component to change direction. There is space below the rotating platform (3) for other tunnel equipment to pass through.

2. The lifting device for a single-track tunnel with passing function as described in claim 1, characterized in that: The lifting mechanism includes a lifting motor (33) and at least two horizontal support shafts (5) extending left and right at intervals below the lifting platform (2). The left and right ends of the horizontal support shafts (5) are mounted on the mounting base (7) by pins (6). The mounting base (7) is fixed on the nut of the screw nut mechanism. The lifting motor (33) drives the screws in all the screw nut mechanisms to rotate through the transmission mechanism, thereby driving the lifting platform (2) to be lifted through all the horizontal support shafts (5).

3. The lifting device for a single-track tunnel with passing function as described in claim 1, characterized in that: The transmission mechanism includes several power transmission shafts (9) and several intermediate transmission boxes (10). The intermediate transmission boxes (10) are connected to each other and to the lifting motor (33) through the power transmission shafts (9). A coupling (11) is provided between the power transmission shafts (9) and the intermediate transmission boxes (10). The power transmission shafts (9) are mounted on the main frame (1) through the transmission shaft support (12). An intermediate transmission box (10) is provided at the upper end of each screw nut mechanism, so that the lifting motor (33) can synchronously drive all the screw nut mechanisms.

4. The lifting device for a single-track tunnel with passing function as described in claim 3, characterized in that: The lead screw and nut mechanism includes a vertically arranged lead screw (13), the upper end of which is connected to the intermediate conveyor box (10). A nut is screwed onto the lead screw (13). The main frame (1) is provided with a column (15) for each lead screw (13). The two columns (15) facing each other on the left and right have notches for the nut to slide up and down.

5. The lifting device for a single-track tunnel with passing function as described in claim 2, characterized in that: When there are two lifting motors, an arched connecting beam (39) is provided on the front side of the main frame (1); when there is one lifting motor, a horizontally extending support beam (40) is provided at the front end of the main frame (1).

6. The lifting device for a single-track tunnel with passing function as described in claim 1, characterized in that: The lifting platform (2) is equipped with platform approach bridges (16) on both the front and rear sides to facilitate the tunnel equipment to travel onto the lifting platform. After the lifting platform (2) is lifted by the lifting mechanism, it is lower than the rotating platform (3). A pump guide bridge (34) is set between the lifting platform (2) and the rotating platform (3) to allow the tunnel equipment to travel from the lifting platform (2) to the rotating platform (3). The rotating platform (3) is a circular platform and is fitted onto the fixed platform (17).

7. The lifting device for a single-track tunnel with passing function as described in claim 6, characterized in that: The rotating platform (3) is used for pump truck reversing. The fixed platform (17) is equipped with a reversing adapter for realizing rapid reversing of the pump truck discharge pipe. The reversing adapter includes a reversing pipe (20) and a reversing seat (19) set on the fixed platform (17). The upper end of the reversing seat (19) away from the pump truck has two joints (21) arranged in a row and can be connected to the reversing pipe (20). Each joint (21) is equipped with a pump pipe (22) for pumping concrete. The upper end of the reversing seat (19) near the pump truck is provided with a connecting pipe (23) that can be connected to the reversing pipe (20). The end of the reversing pipe (20) near the connecting pipe (23) is provided with a rotating component for realizing the rotation of the reversing pipe (20).

8. The lifting device for a single-track tunnel with passing function as described in claim 7, characterized in that: The rotating assembly includes a rotating motor (24) mounted on a reversing seat (19), a driven sprocket (25) mounted on a reversing tube (20), a driving sprocket mounted at the output end of the rotating motor (24), and a connecting chain (27) between the driving sprocket and the driven sprocket (25).

9. The lifting device for a single-track tunnel with passing function as described in claim 7, characterized in that: The reversing pipe (20) and the connecting pipe (23), as well as the reversing pipe (20) and the connector (21), are connected by a flared mouth or a flexible hose.

10. The lifting device for a single-track tunnel with passing function as described in claim 6, characterized in that: The fixed platform (17) is mounted on the main frame (1) via a support frame (18). The rotating component includes a rotary motor (28) located below the support frame (18). The output end of the rotary motor (28) is provided with a drive gear (29). A driven gear (30) that can mesh with the drive gear (29) is located below the rotating platform (3). When the rotary motor (28) is working, it drives the drive gear (29) to rotate. The rotation of the rotating platform (3) is achieved through the meshing of the drive gear (29) and the driven gear (30).

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