Secondary lining steel bar mounting trolley for tunnel construction

Abstract

The secondary lining steel bar mounting trolley for tunnel construction comprises a trolley frame, first supports are fixedly arranged on the left side and the right side of the bottom of the front end of the trolley frame and the left side and the right side of the bottom of the rear end of the trolley frame, and driving mechanisms are installed on the first supports and used for driving the trolley frame to move linearly. The two driving mechanisms located at the front end are each provided with a steel bar bending mechanism, each driving mechanism comprises a bottom plate, the bottom plates are located on the front sides of first supports, the first supports are fixedly connected with the bottom plates, and first motors are fixedly arranged at the tops of the bottom plates; a first notch is formed in the middle of the bottom plate, a wheel is arranged in the first notch, the bottom of the wheel is located below the bottom plate and connected with a rail, and a one-way bearing is arranged in the center of the wheel in a penetrating mode. Only one worker is needed for operation at least, installation and binding of the circumferential steel bars are completed, the automation degree is high, time and labor are saved, and the construction period can be effectively shortened.

Description

Technical Field

[0001] This invention relates to the field of installation trolleys, and more particularly to an installation trolley for secondary lining steel reinforcement in tunnel construction. Background Technology

[0002] In modern tunnel construction, secondary lining is a core process to ensure the safety, waterproofing, and durability of the tunnel structure. Secondary lining reinforcement installation trolleys, large-scale mechanized construction equipment specifically designed for secondary lining reinforcement binding operations, are gradually replacing traditional manual scaffolding erection methods, becoming a key tool for improving tunnel construction quality and efficiency.

[0003] The secondary lining rebar installation trolley is a specialized construction vehicle integrating walking, positioning, working platform, safety protection, and auxiliary hoisting functions. Its main structure typically consists of a main beam, columns, a walking mechanism, a multi-level working platform, and a hydraulic adjustment system. The trolley moves along pre-laid tracks or a self-propelled wheel system within the tunnel, covering the entire cross-section of the tunnel arch, arch waist, and sidewalls. Through the hydraulic system, the trolley's working platform can be fine-tuned and raised / lowered, ensuring that construction personnel can accurately reach any position for rebar installation, greatly reducing the risks of working at height.

[0004] Compared to traditional construction methods, the secondary lining rebar installation trolley has significant advantages. Firstly, it offers high safety. Traditional methods require manual erection of full-scale scaffolding, which is not only time-consuming and labor-intensive but also poses safety hazards such as falls from heights and falling objects. The trolley provides a stable, fully enclosed working platform with guardrails, fundamentally improving the working environment. Secondly, it offers high construction efficiency. The trolley enables "one-stop" operation; rebar transportation, positioning, and binding can all be carried out continuously on the platform without repeatedly dismantling and reassembling scaffolding, increasing construction speed by 30% to 50% and effectively shortening the construction period. Thirdly, it ensures controllable quality. Equipped with precise positioning devices and a standardized working space, the trolley guarantees that rebar spacing, protective layer thickness, and binding strength meet design specifications, reducing human error and improving the overall forming quality of the secondary lining concrete.

[0005] Furthermore, modern secondary lining reinforcement installation trolleys emphasize intelligent and user-friendly design. Some advanced models are equipped with automatic walking control systems, laser positioning assistance systems, and lighting and ventilation facilities, and even integrate small lifting equipment to facilitate the hoisting and positioning of heavy reinforcement bars. Their modular design allows the trolley to adapt to the needs of tunnels with different cross-sectional shapes and sizes, possessing excellent versatility and ease of relocation.

[0006] With the rapid development of transportation infrastructure construction, the quality requirements for tunnel engineering are becoming increasingly stringent. The widespread application of secondary lining reinforcement installation trolleys signifies the inevitable trend of tunnel construction transforming from a "human wave" approach to "mechanization and intelligence." This not only reduces the labor intensity of workers and ensures construction safety, but also promotes a comprehensive improvement in tunnel engineering quality through standardized operations.

[0007] Although the existing secondary lining reinforcement installation trolleys can greatly shorten the construction period and save manpower, when installing circumferential reinforcement in the tunnel, each trolley still needs to be equipped with multiple workers to carry out the installation and binding of circumferential reinforcement, resulting in a long overall construction time, which requires improvement. Summary of the Invention

[0008] The purpose of this invention is to provide a secondary lining reinforcement installation trolley for tunnel construction to solve the above-mentioned technical problems.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A trolley for installing secondary lining steel bars in tunnel construction includes a frame. First supports are fixed on the left and right sides of the bottom front end and the left and right sides of the bottom rear end of the frame. A drive mechanism is installed on the first support. The drive mechanism is used to drive the frame to move linearly. A steel bar bending mechanism is installed on the two drive mechanisms located at the front end.

[0010] Preferably, the drive mechanism includes a base plate located in front of the first bracket, the first bracket being fixedly connected to the base plate, and a first motor being fixedly mounted on the top of the base plate; a first notch is provided in the middle of the base plate, a wheel is provided in the first notch, the bottom of the wheel is located below the base plate, the bottom of the wheel is connected to the track, a one-way bearing is provided through the center of the wheel, the outer ring of the one-way bearing is fixedly connected to the wheel, the inner ring of the one-way bearing is fixedly connected to the first rotating shaft, and the end of the first rotating shaft is fixedly connected to the power output end of the first motor.

[0011] Preferably, a top plate is provided above the bottom plate, and a plurality of second supports are provided between the top plate and the bottom plate. The upper end of the second support is fixedly connected to the top plate, and the lower end of the second support is fixedly connected to the bottom plate.

[0012] Preferably, the rebar bending mechanism includes a first gear, which is sleeved on the right end of a first rotating shaft and fixedly connected to the first rotating shaft; a second gear is provided above the top plate, which is sleeved on a second rotating shaft and fixedly connected to the second rotating shaft; a third gear is also sleeved on the second rotating shaft and fixedly connected to the second rotating shaft; first bearings are provided on both sides of the third gear, which are sleeved on the second rotating shaft; the inner ring of the first bearing is fixedly connected to the second rotating shaft; the outer ring of the first bearing is fixedly connected to a third bracket; the third bracket is fixedly connected to the top of a guide tube; the bottom of the guide tube is fixedly connected to the top plate; a guide rod is slidably arranged inside the guide tube; the surface of the guide rod has several toothed grooves that mesh with the third gear; a rebar fixing mechanism is installed on the top of the guide rod; a second notch is provided on the top plate, and a chain is provided inside the second notch; the upper and lower ends of the chain are respectively connected to the second gear and the first gear.

[0013] Preferably, the rebar fixing mechanism includes a U-shaped bracket, the U-shaped bracket is made of magnetic material, the U-shaped bracket is fixedly mounted at an incline on the top of the guide rod, and a rebar binding mechanism is also installed on the U-shaped bracket.

[0014] Preferably, the rebar tying mechanism includes two fourth supports, which are respectively fixed on the left and right sides of the U-shaped support. A first hydraulic column is fixed on the top of the fourth support, and a through hole is opened on the first hydraulic telescopic end of the first hydraulic column.

[0015] Preferably, the rebar tying mechanism further includes a fifth support, which is fixedly mounted on the front side of the U-shaped support. A second hydraulic column is fixedly mounted on the fifth support. A second spring is sleeved on the second hydraulic telescopic end of the second hydraulic column. One end of the second spring is fixedly connected to the second hydraulic column, and the other end of the second spring is fixedly connected to the second hydraulic telescopic end. The second hydraulic column is connected to the first hydraulic column through an oil pipe.

[0016] Preferably, the first motor is wirelessly connected to the first controller.

[0017] Preferably, the first controller is used to control the forward and reverse rotation of the first motor.

[0018] Preferably, a wire receiving groove is provided on the inner wall of the U-shaped bracket.

[0019] The beneficial effects of this invention are: 1. This invention designs a secondary lining steel reinforcement installation trolley for tunnel construction, which requires only one worker to operate and complete the installation and binding of circumferential steel reinforcement. It has a high degree of automation, saves time and labor, and can effectively shorten the construction period.

[0020] 2. This invention eliminates the need for pre-bending the reinforcing bars. Instead, during installation, the power of the vehicle's movement and the curved tunnel walls allow the reinforcing bars to be bent into a circumferential shape. Furthermore, this invention eliminates the need for extensive manual labor to tie the circumferential and longitudinal reinforcing bars, enabling automated tying and effectively improving construction efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a secondary lining steel reinforcement installation trolley for tunnel construction according to the present invention; Figure 2 This is a structural schematic diagram of a tunnel construction secondary lining steel reinforcement installation trolley drive mechanism, steel reinforcement bending mechanism, and steel reinforcement binding mechanism according to the present invention. Figure 3 This invention relates to a secondary lining steel reinforcement installation trolley for tunnel construction. Figure 2 Enlarged schematic diagram of part A; Figure 4 This invention relates to a secondary lining steel reinforcement installation trolley for tunnel construction. Figure 2 Enlarged schematic diagram of part B; Figure 5 This invention relates to a secondary lining steel reinforcement installation trolley for tunnel construction. Figure 2 Enlarged schematic diagram of part C; Figure 6 This is a schematic diagram of the structure of a wheel for a secondary lining steel reinforcement installation trolley in tunnel construction according to the present invention; Figure 7 This is a schematic diagram of the structure of a U-shaped bracket for installing secondary lining steel bars in tunnel construction according to the present invention; Figure 8 This is a schematic diagram illustrating the working principle of a tunnel construction secondary lining reinforcement installation trolley according to Embodiment 2 of the present invention; Reference numerals: 1. Circumferential reinforcement; 2. Longitudinal reinforcement; 3. Second gear; 4. First hydraulic column; 5. Fourth bracket; 6. Guide rod; 7. Fifth bracket; 8. First hydraulic telescopic end; 9. Through hole; 10. Second hydraulic column; 11. Second spring; 12. Wire receiving groove; 13. Second hydraulic telescopic end; 15. First bracket; 16. U-shaped bracket; 17. Wire; 19. Gear groove; 20. Third gear; 21. First bearing; 22. Third bracket; 23. Guide tube; 24. Chain; 25. Second shaft; 26. Top plate; 27. Second notch; 28. Second bracket; 29. ​​Bottom plate; 30. First shaft; 31. First gear; 32. First notch; 33. Wheel; 34. First motor; 35. One-way bearing; 36. Frame. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Example 1 like Figure 1 As shown, a secondary lining steel reinforcement installation trolley for tunnel construction includes a frame 36. First supports 15 are fixed on the left and right sides of the bottom front end and the left and right sides of the bottom rear end of the frame 36. A drive mechanism is installed on the first support 15. The drive mechanism is used to drive the frame 36 to move linearly. Steel reinforcement bending mechanisms are installed on the two drive mechanisms located at the front end.

[0026] like Figure 2 , Figure 5 , Figure 6 As shown, the drive mechanism includes a base plate 29, which is located in front of the first bracket 15. The first bracket 15 is fixedly connected to the base plate 29. A first motor 34, which is a DC motor, is fixedly mounted on the top of the base plate 29. A first notch 32 is provided in the middle of the base plate 29, and a wheel 33 is disposed within the first notch 32. The bottom of the wheel 33 is located below the base plate 29 and is connected to the track. A one-way bearing 35 is provided through the center of the wheel 33, and the outer ring of the one-way bearing 35 is fixedly connected to the wheel 33. The inner ring of the one-way bearing 35 is fixedly connected to the first rotating shaft 30. The end of the first rotating shaft 30 is fixedly connected to the power output end of the first motor 34. The first motor 34 is wirelessly connected to the first controller. The first controller is used to control the forward and reverse rotation of the first motor 34. The first controller is a Bluetooth DC forward and reverse controller. A top plate 26 is provided above the base plate 29. Multiple second brackets 28 are provided between the top plate 26 and the base plate 29. The upper end of the second bracket 28 is fixedly connected to the top plate 26, and the lower end of the second bracket 28 is fixedly connected to the base plate 29.

[0027] like Figures 2 to 5 As shown, the rebar bending mechanism includes a first gear 31, which is sleeved on the right end of the first rotating shaft 30 and fixedly connected to it. A second gear 3 is positioned above the top plate 26, sleeved on the second rotating shaft 25 and fixedly connected to it. A third gear 20 is also sleeved on the second rotating shaft 25 and fixedly connected to it. First bearings 21 are positioned on both sides of the third gear 20, sleeved on the second rotating shaft 25. The inner ring of each bearing 21... The first bearing 21 is fixedly connected to the second rotating shaft 25. The outer ring of the first bearing 21 is fixedly connected to the third bracket 22. The third bracket 22 is fixedly connected to the top of the guide tube 23. The bottom of the guide tube 23 is fixedly connected to the top plate 26. A guide rod 6 is slidably arranged inside the guide tube 23. Several toothed grooves 19 are opened on the surface of the guide rod 6. The toothed grooves 19 mesh with the third gear 20. A steel bar fixing mechanism is installed on the top of the guide rod 6. A second notch 27 is opened on the top plate 26. A chain 24 is arranged inside the second notch 27. The upper and lower ends of the chain 24 are connected to the second gear 3 and the first gear 31, respectively.

[0028] like Figure 2 , Figure 3 As shown, the rebar fixing mechanism includes a U-shaped bracket 16, which is made of magnet material. The U-shaped bracket 16 is fixed at an angle to the top of the guide rod 6, and a rebar binding mechanism is also installed on the U-shaped bracket 16.

[0029] The worker places the circumferential reinforcing bar 1 inside the U-shaped bracket 16. Since the U-shaped bracket 16 is made of magnetic material, it can attract and fix the circumferential reinforcing bar 1.

[0030] The worker stands on the frame 36 and controls the first motor 34 to rotate forward through the first controller. The first motor 34 drives the wheels 33 to rotate, so that the wheels 33 move on the track, thereby propelling the device to move inside the tunnel.

[0031] When the first motor 34 drives the wheel 33 to rotate, it drives the first gear 31 to rotate synchronously through the first shaft 30. The first gear 31 drives the second gear 3 to rotate through the chain 24. The second gear 3 drives the third gear 20 to rotate through the second shaft 25. This causes the third gear 20 to drive the guide rod 6, which meshes with it, to move upward. The guide rod 6 drives the circumferential steel bar 1 in the U-shaped bracket 16 to move upward synchronously. Since the top of the tunnel is arc-shaped, when the circumferential steel bar 1 moves upward, both ends of the circumferential steel bar 1 first contact the tunnel wall. As the guide rod 6 continues to push the circumferential steel bar 1 upward, the circumferential steel bar 1 gradually bends and fits against the tunnel wall, so that the circumferential steel bar 1 forms a circle.

[0032] Example 2 like Figure 2 , Figure 3As shown, while other parts are the same as in Embodiment 1, the difference between this embodiment and Embodiment 1 is that the rebar tying mechanism includes two fourth supports 5, which are respectively fixed on the left and right sides of the U-shaped support 16. A first hydraulic column 4 is fixed on the top of the fourth support 5, and a through hole 9 is opened on the first hydraulic telescopic end of the first hydraulic column 4.

[0033] like Figure 2 , Figure 3 As shown, the rebar tying mechanism also includes a fifth support 7, which is fixed to the front side of the U-shaped support 16. A second hydraulic column 10 is fixed on the fifth support 7. A second spring 11 is sleeved on the second hydraulic telescopic end 13 of the second hydraulic column 10. One end of the second spring 11 is fixed to the second hydraulic column 10, and the other end of the second spring 11 is fixed to the second hydraulic telescopic end 13. The second hydraulic column 10 is connected to the first hydraulic column 4 through an oil pipe. A wire receiving groove 12 is opened on the inner wall of the U-shaped support 16.

[0034] Before placing the circumferential reinforcing bar 1 inside the U-shaped bracket 16, first place the steel wire 17 used for reinforcing bar binding in the steel wire receiving groove 12 inside the U-shaped bracket 16, insert both ends of the steel wire 17 into the through holes 9 of the two first hydraulic telescopic ends 8 respectively, and then place the circumferential reinforcing bar 1 into the U-shaped bracket 16 so that the circumferential reinforcing bar 1 presses down on the steel wire 17. Since the steel wire 17 only crosses once when binding, the steel wire 17 should be selected with a higher hardness, such as 65Mn, 60Si2Mn, 55SiCr, etc., so that after the two ends of the steel wire 17 cross, the circumferential reinforcing bar 1 and the longitudinal reinforcing bar 2 can be firmly fixed.

[0035] As the guide rod 6 continues to push the circumferential reinforcing bar 1 upward, the circumferential reinforcing bar comes into contact with the longitudinal reinforcing bar, and the circumferential reinforcing bar is perpendicular to the longitudinal reinforcing bar, so that the longitudinal reinforcing bar is located between the two first hydraulic columns 4. The second hydraulic telescopic end 13 of the second hydraulic column 10 first comes into contact with the tunnel wall, so that the second hydraulic telescopic end 13 is pressed.

[0036] The second hydraulic telescopic end 13 pushes the hydraulic oil in the second hydraulic column 10 into the first hydraulic column 4 through the oil pipe, causing the first hydraulic telescopic end 8 of the first hydraulic column 4 to extend. This causes the two first hydraulic telescopic ends 8 to push the two ends of the steel wire 17 together and cross, binding the cross joint between the circumferential reinforcing bar 1 and the longitudinal reinforcing bar 2. As the first hydraulic telescopic end 8 continues to extend, due to the limited length of the steel wire 17, the steel wire 17 eventually detaches from the through hole 9, forming a... Figure 8 The binding effect shown.

[0037] The first motor 34 is reversed by the first controller. Since the first motor 34 is connected to the wheel 33 through the first shaft 30 and the one-way bearing 35, the first motor 34 will not drive the wheel 33 to rotate in the opposite direction when it reverses, so that the device will not move backward. However, it will drive the first gear 31 to reverse through the first shaft 30. This will cause the first gear 31 to drive the guide rod 6 to move down and reset through the chain 24, the second gear 3, the second shaft 25, and the third gear 20. The guide rod 6 will drive the U-shaped bracket 16 to move down synchronously. During the downward movement of the U-shaped bracket 16, since the second hydraulic telescopic end 13 is no longer pressed by the tunnel wall, it will move up and reset under the elastic force of the second spring 11, thereby causing the first hydraulic telescopic end 8 to retract and reset. Since the circumferential steel bar 1 and the longitudinal steel bar 2 are tied together, the guide rod 6 will drive the U-shaped bracket 16 to move down synchronously and detach from the circumferential steel bar 1 when it moves down.

[0038] The first motor 34 is controlled to rotate forward again by the first controller, so that the device can move forward and carry out the next installation of the circumferential reinforcing bar 1.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A trolley for installing secondary lining steel bars in tunnel construction, comprising a frame (36), characterized in that: The left and right sides of the front bottom and the left and right sides of the rear bottom of the frame (36) are all fixed with first brackets (15). The first brackets (15) are equipped with drive mechanisms. The drive mechanisms are used to drive the frame (36) to move linearly. The two drive mechanisms at the front end are equipped with steel bar bending mechanisms.

2. The tunnel construction secondary lining reinforcement installation trolley according to claim 1, characterized in that: The driving mechanism includes a base plate (29), which is located in front of the first bracket (15). The first bracket (15) is fixedly connected to the base plate (29), and a first motor (34) is fixedly mounted on the top of the base plate (29). The base plate (29) has a first notch (32) in the middle, and a wheel (33) is provided in the first notch (32). The bottom of the wheel (33) is located below the base plate (29). The bottom of the wheel (33) is connected to the track. A one-way bearing (35) is provided through the center of the wheel (33). The outer ring of the one-way bearing (35) is fixed to the wheel (33), and the inner ring of the one-way bearing (35) is fixed to the first rotating shaft (30). The end of the first rotating shaft (30) is fixed to the power output end of the first motor (34).

3. The tunnel construction secondary lining reinforcement installation trolley according to claim 2, characterized in that: A top plate (26) is provided above the bottom plate (29). A plurality of second supports (28) are provided between the top plate (26) and the bottom plate (29). The upper end of the second support (28) is fixed to the top plate (26), and the lower end of the second support (28) is fixed to the bottom plate (29).

4. The tunnel construction secondary lining reinforcement installation trolley according to claim 3, characterized in that: The steel bar bending mechanism includes a first gear (31), which is sleeved on the right end of the first rotating shaft (30) and is fixedly connected to the first rotating shaft (30); A second gear (3) is provided above the top plate (26). The second gear (3) is sleeved on the second rotating shaft (25) and fixedly connected to the second rotating shaft (25). A third gear (20) is also sleeved on the second rotating shaft (25) and fixedly connected to the second rotating shaft (25). A first bearing (21) is provided on both the left and right sides of the third gear (20). The first bearing (21) is sleeved on the second rotating shaft (25). 1) The inner ring is fixedly connected to the second rotating shaft (25), the outer ring of the first bearing (21) is fixedly connected to the third bracket (22), the third bracket (22) is fixedly connected to the top of the guide tube (23), the bottom of the guide tube (23) is fixedly connected to the top plate (26), a guide rod (6) is slidably arranged inside the guide tube (23), a number of tooth grooves (19) are opened on the surface of the guide rod (6), the tooth grooves (19) mesh with the third gear (20), and a steel bar fixing mechanism is installed on the top of the guide rod (6); The top plate (26) has a second notch (27), and a chain (24) is provided in the second notch (27). The upper and lower ends of the chain (24) are connected to the second gear (3) and the first gear (31) respectively.

5. The tunnel construction secondary lining reinforcement installation trolley according to claim 4, characterized in that: The steel bar fixing mechanism includes a U-shaped bracket (16), which is made of magnet material. The U-shaped bracket (16) is inclinedly fixed at the top of the guide rod (6), and a steel bar binding mechanism is also installed on the U-shaped bracket (16).

6. The tunnel construction secondary lining reinforcement installation trolley according to claim 5, characterized in that: The rebar tying mechanism includes two fourth supports (5), which are fixed on the left and right sides of the U-shaped support (16) respectively. A first hydraulic column (4) is fixed on the top of the fourth support (5), and a through hole (9) is opened on the first hydraulic telescopic end of the first hydraulic column (4).

7. A tunnel construction secondary lining reinforcement installation trolley according to claim 6, characterized in that: The rebar binding mechanism also includes a fifth support (7), which is fixed on the front side of the U-shaped support (16). A second hydraulic column (10) is fixed on the fifth support (7). A second spring (11) is sleeved on the second hydraulic telescopic end (13) of the second hydraulic column (10). One end of the second spring (11) is fixed to the second hydraulic column (10), and the other end of the second spring (11) is fixed to the second hydraulic telescopic end (13). The second hydraulic column (10) and the first hydraulic column (4) are connected through an oil pipe.

8. A tunnel construction secondary lining reinforcement installation trolley according to claim 7, characterized in that: The first motor (34) is wirelessly connected to the first controller.

9. A tunnel construction secondary lining reinforcement installation trolley according to claim 8, characterized in that: The first controller is used to control the forward and reverse rotation of the first motor (34).

10. A tunnel construction secondary lining reinforcement installation trolley according to claim 7, characterized in that: The inner wall of the U-shaped bracket (16) is provided with a wire receiving groove (12).

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