A tooling and method for transporting steel reinforcement bars for tunnel secondary lining

Abstract

This invention relates to the field of tunnel engineering construction technology, specifically to a tooling and method for transporting tunnel secondary lining reinforcement. The tooling includes a reinforcement hanging trolley, an I-beam slide rail, a movable pulley block, a fixed pulley, and a winch. The I-beam slide rail is welded to the truss of the hanging trolley, with a continuous slot in its web. The end of the I-beam slide rail forms a 30°±5° unloading section. The movable pulley block is fitted into the continuous slot by I-beam-shaped buckles. A first hook is provided at the bottom of the movable pulley block, and a pulley and a second hook are provided at the top of the slide rail. The winch drives a wire rope through a guide pulley → second pulley → fixed pulley → first pulley → second hook, forming an n=4 labor-saving system (F=G / 4). The method includes: loading reinforcement → hoisting with the winch → 30° gravity unloading → assisted descent with a reset rope. This invention solves the problems of low efficiency, high safety hazards, and reinforcement damage caused by manual handling through a mechanized hoisting system using an I-beam slide rail and pulley block, achieving efficient and damage-free transport of tunnel secondary lining reinforcement.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering construction technology, specifically to a tooling and method for transporting steel reinforcement bars for secondary tunnel lining. Background Technology

[0002] The following problems exist in the transportation of steel bars from the processing area to the binding work face during tunnel secondary lining construction: 1. Low efficiency: Manually extracting a steel bar from the steel bar processing area, grasping it from one end and dragging it from the processing area to the binding work surface. If the steel bar is long, multiple people need to drag it at the same time. Moving it to the work platform is time-consuming, laborious and inefficient. 2. Safety Hazards: Reinforcing bars can be transported by dragging them on the ground or by transporting them from the ground to the installation location (at a height). When transporting them to a height, if the reinforcing bars are short, they can be manually erected. If the reinforcing bars are long and heavy, they need to be hoisted from the ground to the installation location. However, to ensure that the reinforcing bars do not fall during transportation, and because the reinforcing bars are heavy, usually only one reinforcing bar is tied. However, the tying action may be insecure, making it easy for the reinforcing bars to slip during high-altitude transport. In addition, repeated tying will lead to high labor intensity for workers. 3. High labor costs: As can be seen from the above process of transporting steel bars, the transportation of steel bars is very common in the construction of tunnel secondary lining. The transportation of each single steel bar requires the cooperation of multiple people, which leads to high labor costs.

[0003] 4. Poor environmental performance: Since the contact between the steel bars and the ground or the installation surface at a high place is all done by people directly throwing the steel bars down, and because the steel bars are flexible, they will hit the ground multiple times, causing a lot of noise. In addition, the falling steel bars may damage the ground or cause deformation and damage to the steel bars.

[0004] Therefore, how to achieve an efficient, safe, low-cost, and environmentally friendly operation method during the transportation of steel reinforcement for tunnel lining has become an urgent technical problem to be solved. Summary of the Invention

[0005] The problem to be solved by this invention is to provide a tooling and method for transporting steel bars for secondary lining of tunnels. By working together with the through joint of the I-beam slide rail and the I-beam buckle embedded guide mechanism of the movable pulley block, the n=4 labor-saving pulley system and the 30° gravity unloading section, the invention solves the three major technical problems of low efficiency, high safety hazards and high steel bar damage rate in the narrow space of tunnels when manually transporting steel bars.

[0006] To address the shortcomings of existing technologies, the technical solution adopted by this invention to solve its technical problems is: a tunnel secondary lining steel reinforcement transport tool, including a steel reinforcement hanging trolley, which is located in the tunnel and can move back and forth along the tunnel direction. The steel reinforcement hanging trolley is equipped with a bottom working platform and a top working platform, and the bottom working platform is ≤50cm above the ground. The rebar hanging trolley is equipped with an I-beam slide rail. One end of the I-beam slide rail is installed on the top working platform, and the other end of the I-beam slide rail is installed on the bottom working platform and welded to the truss of the rebar hanging trolley. The web of the I-beam slide rail has a through slit along its length, and the end of the I-beam slide rail slopes outward to form a unloading section. The I-beam slide rail is equipped with a movable pulley assembly, and the movable pulley assembly is equipped with an I-shaped buckle. The movable pulley assembly is slidably fitted into the through joint through the I-shaped buckle. The movable pulley assembly includes a first pulley and a second pulley. The first pulley and the second pulley are connected by a first steel strip. The bottom of the first steel strip is provided with a first hook for hanging the reinforcing bar. The top of the I-beam slide rail is provided with a first sealing plate, a fixed pulley is installed on the first sealing plate, a second steel belt is fixedly connected to the first sealing plate, and a second hook is provided at the bottom of the second steel belt; The top working platform is equipped with a winch. One end of the wire rope is connected to the drum of the winch, and the other end of the wire rope passes through the fixed pulley and the movable pulley block in sequence and is fixedly connected to the second hook. The I-beam slide rail is equipped with limiters at intervals to prevent the wire rope from derailing. Guide pulleys are provided on the wire rope path between the winch and the fixed pulley, and the guide pulleys are welded to the outside of the I-beam slide rail. The unloading section of the I-beam slide is equipped with steel bar stacking areas on both the left and right sides, and the angle between the unloading section and the tunnel centerline is 30°±5°; the angle between the bottom working platform and the top working platform section of the I-beam slide is 95°±5°.

[0007] Preferably, the diameter of the second pulley is larger than the diameter of the first pulley, and the diameter of the fixed pulley is equal to the diameter of the second pulley.

[0008] Preferably, bearings are installed at the four corners of the I-shaped buckle, so that the resistance of the movable pulley group sliding along the through gap is ≤5N.

[0009] Preferably, the width of the through-slit is 20±0.5mm.

[0010] Preferably, V-shaped steel bars with a spacing of 80-100cm are welded to the outer side of the I-beam slide rail.

[0011] Preferably, the I-beam slide rail is made of I22 I-beam.

[0012] A method for using the aforementioned tunnel secondary lining steel reinforcement transport tool includes the following steps: Step 1: Reinforcing steel loading: If the length of the steel bar is ≤1m, it can be operated by a single person. The bundled short steel bars are lifted using a hook lock and directly suspended on the first hook of the movable pulley block. If the length of the reinforcing bar is greater than 1m, two people should work together to tie the reinforcing bar on the ground with a longer binding wire rope and then suspend it on the first hook of the movable pulley block. Tie a reset rope to the movable pulley block; Step Two, Enhancement Exercises: Start the winch. The traction force is calculated according to F=G / 4, where G is the total weight of the steel bars. The wire rope runs from the winch through the guide pulley, the second pulley of the movable pulley block, the fixed pulley, the first pulley of the movable pulley block, and finally the end is fixed to the second hook. The movable pulley block rises at a constant speed along the through joint of the I-beam slide. The bearing of the I-beam buckle ensures that the sliding resistance is ≤5N. Step 3: Unloading operation: When the reinforcing bar approaches the unloading section at 30°±5° from the end of the I-beam slide 4, the winch slows down to... For steel bars with a speed of 0.2-0.5 m / s and a length of ≤1 m, workers will move them from the unloading section to the middle area of ​​the left or right steel bar stacking area; for steel bars with a length of >1 m, workers in the left stacking area will place the steel bars in the steel bar enclosure, and the steel bars in the unloading section will automatically slide down to the right steel bar stacking area. Step 4: Reset Operation The winch reverses to release the wire rope, and the auxiliary pulling force of ≤10 kg is applied by the reset rope to pull the moving pulley block back down.

[0013] Preferably, the weight of steel bars lifted in a single operation is ≤1000kg.

[0014] The beneficial effects of this invention are as follows: This invention achieves precise displacement of high-altitude steel bars through the mechanical collaborative design of the I-beam slide rail and the movable pulley block, utilizing the I-beam snap-fit ​​guide mechanism. Combined with the labor-saving transmission system of the movable pulley block and the 30° gravity unloading structure, it completely solves the problems of low manual efficiency, high safety hazards, and high steel bar damage rate in the transportation of tunnel secondary lining steel bars. Compared with traditional manual handling, it improves efficiency, reduces labor costs, prevents damage to steel bars, and reduces mechanical noise, providing a standardized solution for mechanized construction of tunnel engineering. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a top view of the present invention.

[0016] Figure 4 This is a schematic diagram showing the connection between the movable pulley block and the I-beam slide rail.

[0017] Explanation of reference numerals in the attached drawings: 1. Rebar hanging trolley; 41. Through joint; 2. Bottom working platform; 3. Top working platform; 4. I-beam slide rail; 5. Truss; 6. Moving pulley block; 61. First pulley; 62. Second pulley; 7. I-beam buckle; 8. First steel belt; 81. First hook; 9. First sealing plate; 10. Fixed pulley; 11. Second steel belt; 12. Second hook; 13. Winch; 14. Wire rope; 15. Limiter; 16. Guide pulley; 17. Second sealing plate; 18. V-shaped rebar; 19. Bearing. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0019] like Figure 1-4 As shown, the present invention provides a tunnel secondary lining steel reinforcement transport tool and its usage method. The tunnel secondary lining steel reinforcement transport tool includes a steel reinforcement hanging trolley 1, which is 15 meters long. The steel reinforcement hanging trolley 1 is located in the tunnel and can move back and forth along the tunnel direction, carrying the entire transport system.

[0020] The steel bar hanging trolley 1 is equipped with a bottom working platform 2 and a top working platform 3. The bottom working platform 2 is ≤50cm above the ground.

[0021] The rebar hanging trolley 1 is equipped with an I-beam slide rail 4. The I-beam slide rail 4 is made of I22 I-beams. One end of the I-beam slide rail 4 is installed on the top working platform 3, and the other end of the I-beam slide rail 4 is installed on the bottom working platform 2 and welded to the truss of the rebar hanging trolley. The angle between the bottom working platform 2 and the section of the I-beam slide rail 4 on the top working platform 3 is 95°±5°, preferably 95°.

[0022] The web of the I-beam slide 4 has a through joint 41 with a width of 20±0.5mm along its length. The end of the I-beam slide 4 slopes outward to form a discharge section. There are steel bar stacking areas on the left and right sides of the discharge section of the I-beam slide 4. The angle between the discharge section of the I-beam slide 4 and the central axis of the tunnel is α, which is 30°±5°, preferably 30°, to facilitate the unloading of steel bars.

[0023] A movable pulley block 6 is installed on the I-beam slide rail 4. The movable pulley block 6 is equipped with I-beam-shaped clips 7. The movable pulley block 6 is slidably fitted into the through joint 41 via the I-beam-shaped clips 7, providing a precise guide track for the movable pulley block 6 and preventing lateral deviation. Bearings 19 are installed at the four corners of the I-beam-shaped clips 7, ensuring that the resistance of the movable pulley block 6 sliding along the through joint 41 is ≤5N, guaranteeing smooth operation under full load. The movable pulley block 6 includes a first pulley 61 and a second pulley 62. The diameter of the second pulley 62 is larger than that of the first pulley 61. The diameter of the first pulley 61 is 80mm, and the diameter of the second pulley 62 is 120mm. The difference in diameter between the two pulleys prevents the wire rope 14 from tangling. The first pulley 61 and the second pulley 62 are connected by a first steel strip 8. The bottom of the first steel strip 8 is equipped with a first hook 81 for hanging reinforcing bars.

[0024] The top of the I-beam slide rail 4 is equipped with a first sealing plate 9, and the bottom of the I-beam slide rail 4 is equipped with a second sealing plate 17. The non-pulley working areas of the first sealing plate 9 and the second sealing plate 17 are not designed with through joints 41 to protect the internal pulley assembly from falling off the track. The distance from the top of the first sealing plate 9 to the through joint 41 is 80-100cm, and the distance from the bottom of the second sealing plate 17 to the through joint 41 is 80-100cm. The absence of through joints 41 in these two sections ensures the stability of the I-beam itself. A fixed pulley 10 is installed on the first sealing plate 9. The diameter of the fixed pulley 10 is equal to the diameter of the second pulley 62 to maintain balanced tension in the wire rope. A second steel belt 11 is fixedly connected to the first sealing plate 9 to directly transmit the terminal tension to the I-beam slide rail 4, reducing the load on the fixed pulley 10. A second hook 12 is provided at the bottom of the second steel belt 11. Both the first steel belt 8 and the second steel belt 11 are openable structures for easy replacement of worn pulleys and wire ropes 14.

[0025] The top working platform 3 is equipped with a winch 13, which provides traction power. The maximum lifting weight of the winch 13 is 1000kg, and the traction force is F=G / 4.

[0026] One end of the wire rope 14 is connected to the drum of the winch 13, and the other end of the wire rope 14 passes through the fixed pulley 10 and the movable pulley block 6 in sequence and is fixedly connected to the second hook 12. Limiters 15 are provided at intervals on the I-beam slide rail 4 to prevent the wire rope 14 from derailing. The limiters 15 constrain the wire rope 14 to run in the vertical plane and prevent it from derailing.

[0027] A guide pulley 16 is provided on the path of the wire rope 14 between the winch 13 and the fixed pulley 10. The guide pulley 16 is welded to the outside of the I-beam slide 4 to change the direction of the wire rope 14 and prevent it from wearing. V-shaped steel bars 18 with a spacing of 80-100cm are welded to the outside of the I-beam slide 4 to form a protective channel for the wire rope and reduce friction loss.

[0028] The method of using the tunnel secondary lining steel reinforcement transport equipment includes the following steps: Step 1: Reinforcing steel loading: If the length of the steel bar is ≤1m, it can be operated by a single person. The bundled short steel bars are lifted using a hook lock and directly suspended from the first hook 81 of the movable pulley 6. If the length of the reinforcing bar is greater than 1m, two people work together to tie the reinforcing bar on the ground with a longer binding wire rope and then suspend it on the first hook 81 of the movable pulley 6. Tie a reset rope to the movable pulley block 6; Step Two, Enhancement Exercises: Start the winch 13. The traction force is calculated according to F=G / 4, where G is the total weight of the steel bars. The running path of the wire rope 14 is as follows: starting from the winch 13, it passes through the guide pulley 16, the second pulley 62 of the movable pulley block, the fixed pulley 10, the first pulley 61 of the movable pulley block, and finally the end is fixed to the second hook 12. The movable pulley block 6 rises at a constant speed along the through joint 41 of the I-beam slide 4. The bearing 19 of the I-beam buckle 7 ensures that the sliding resistance is ≤5N. Step 3: Unloading operation: When the reinforcing bars approach the unloading section at 30°±5° from the end of the I-beam slide 4, the winch 13 reduces its speed to 0.2-0.5 m / s. For reinforcing bars with a length ≤1m, workers move them from the unloading section to the middle of the left or right reinforcing bar stacking area. For reinforcing bars with a length >1m, workers in the left stacking area place the reinforcing bars in the enclosure, and the reinforcing bars in the unloading section automatically slide down to the right reinforcing bar stacking area. Step 4: Reset Operation The winch 13 reverses to release the wire rope 14, and the auxiliary pulling force of ≤10 kg is applied by the reset rope to pull the pulley block 6 back down.

[0029] Labor-saving principle: 1. Fixed pulley F=G, fixed pulley trajectory, does not save effort, for example, if the weight of the steel bar is 37.02kg, the fixed pulley will still weigh 37.02kg.

[0030] 2. Movable pulley: F=G / 2, saves 1 / 2 of the force. For example, if the steel bar weighs 37.02kg, the force of the movable pulley is 37.02kg / 2=18.51kg, saving 1 / 2 of the force.

[0031] 3. Pulley combination: Advantages: It saves effort by combining fixed pulleys and movable pulleys.

[0032] Pulley assembly: This invention uses n=4, where n represents the weight to be borne and the effective number of rope segments (i.e., the number of rope segments directly connected to the movable pulley). Assuming a single Φ20 secondary reinforcing steel bar has a total length of 15 meters and a single weight of 2.468 kWh... 15 meters = 37.02 kg weight.

[0033] The traction force F=G / n=37.02 / 4=9.255kg; a single wire rope can lift a single Φ20 steel bar with a weight of 9.255kg, and multiple steel bars can be lifted at once according to the site conditions using pulley blocks.

[0034] Compared to manual labor: It takes 7.4 kg / person (based on 5 people) to manually move a single Φ20 steel bar (37.02 kg), while this device only requires 9.255 kg of force to replace 5 workers moving a weight of 37.02 kg.

[0035] Work process (taking the construction of the Xicheng Railway Tunnel as an example)

[0036] Rebar loading: 20 Φ20 steel bars (total weight 740.4kg) are suspended from the first hook 81 of the movable pulley block 6, and a reset rope is tied to the movable pulley block 6.

[0037] Lifting operation: Start the winch 13. The wire rope 14 runs along the following path: starting from the winch 13, passing through the guide pulley 16, the second pulley 62 of the movable pulley block, the fixed pulley 10, the first pulley 61 of the movable pulley block, and finally ending at the second hook 12. The traction force is only 185.1 kg (F=G / 4=740.4 / 4). The movable pulley block 6 rises at a constant speed along the I-beam slide rail 4. The bearing 19 of the I-beam buckle 7 ensures that the sliding resistance is ≤5N. Unloading operation: When the steel bar approaches the unloading section at 30°±5° at the end of the I-beam slide 4, the winch 13 reduces its speed to 0.2-0.5m / s, and the steel bar slides down along the unloading section to the right steel bar stacking area; Reset operation: When winch 13 reverses, the reset rope provides an auxiliary pulling force of ≤10 kg to pull pulley block 6 back down.

[0038] In this embodiment, the gap fit between the I-shaped buckle 7 and the through joint 41 ensures that the moving pulley block 6 has no lateral displacement under full load. The load-sharing design of the first steel belt 8 and the second steel belt 11 allows the fixed pulley system to only undertake the steering function, while the terminal tension is directly transmitted to the I-beam slide 4 by the first sealing plate 9. This mechanical separation mechanism significantly extends the service life of the device; the 30° unloading angle avoids damage from steel bar collisions.

[0039] This invention utilizes the mechanical synergy design of I-beam slideways and movable pulley blocks to achieve precise displacement of high-altitude rebars through an I-beam snap-fit ​​guide mechanism. Combined with a labor-saving transmission system for the movable pulley blocks and a 30° gravity unloading structure, it completely solves the problems of low manual efficiency, high safety hazards, and high rebar damage rate in the transportation of tunnel secondary lining rebars. Compared with traditional manual handling, it improves efficiency, reduces labor costs, prevents rebar damage, and reduces mechanical noise, providing a standardized solution for mechanized construction of tunnel engineering.

Claims

1. A tunnel secondary lining steel bar transfer device, characterized in that: Includes a steel bar hanging trolley (1), which is located in the tunnel and can move back and forth along the tunnel direction. The steel bar hanging trolley (1) is equipped with a bottom working platform (2) and a top working platform (3). The bottom working platform (2) is ≤50cm above the ground. The steel bar hanging trolley (1) is equipped with an I-beam slide rail (4). One end of the I-beam slide rail (4) is installed on the top working platform (3), and the other end of the I-beam slide rail (4) is installed on the bottom working platform (2) and welded to the steel bar hanging trolley truss (5). The web of the I-beam slide rail (4) has a through slit (41) along its length, and the end of the I-beam slide rail (4) is inclined outward to form a discharge section. The I-beam slide rail (4) is provided with a movable pulley group (6), and the movable pulley group (6) is provided with an I-shaped buckle (7). The movable pulley group (6) is slidably fitted into the through joint (41) through the I-shaped buckle (7). The movable pulley group (6) includes a first pulley (61) and a second pulley (62). The first pulley (61) and the second pulley (62) are connected by a first steel strip (8). The bottom of the first steel strip (8) is provided with a first hook (81) for hanging steel bars. The top of the I-beam slide (4) is provided with a first sealing plate (9), a fixed pulley (10) is installed on the first sealing plate (9), a second steel belt (11) is fixedly connected to the first sealing plate (9), and a second hook (12) is provided at the bottom of the second steel belt (11). The top working platform (3) is equipped with a winch (13), one end of the wire rope (14) is connected to the drum of the winch (13), and the other end of the wire rope (14) passes through the fixed pulley (10) and the movable pulley group (6) in sequence and is then fixedly connected to the second hook (12). The I-beam slide rail (4) is provided with limiters (15) at intervals to prevent the wire rope (14) from derailing. A guide pulley (16) is provided on the path of the wire rope (14) between the winch (13) and the fixed pulley (10). The guide pulley (16) is welded to the outside of the I-beam slide rail (4). The unloading section of the I-beam slide (4) is provided with steel bar stacking areas on the left and right sides, and the angle between the unloading section and the tunnel centerline is 30°±5°; the angle between the I-beam slide (4) of the bottom working platform (2) and the top working platform (3) is 95°±5°.

2. The tunnel secondary lining steel reinforcement transport tooling according to claim 1, characterized in that: The diameter of the second pulley (62) is greater than the diameter of the first pulley (61), and the diameter of the fixed pulley (10) is equal to the diameter of the second pulley (62).

3. The tunnel secondary lining steel reinforcement transport tooling according to claim 1, characterized in that: The four corners of the I-shaped buckle (7) are respectively equipped with bearings (19), so that the resistance of the movable pulley group (6) sliding along the through seam (41) is ≤5N.

4. The tunnel secondary lining steel reinforcement transport tooling according to claim 1, characterized in that: The width of the through seam (41) is 20±0.5mm.

5. The tunnel secondary lining steel reinforcement transport tooling according to claim 1, characterized in that: The outer side of the I-beam slide (4) is welded with V-shaped steel bars (18) spaced 80-100cm apart.

6. The tunnel secondary lining steel reinforcement transport tooling according to claim 1, characterized in that: The I-beam slide rail (4) is made of I22 I-beam.

7. A method for using the tunnel secondary lining steel reinforcement transport tool according to claim 1, characterized in that: Includes the following steps: Step 1: Reinforcing steel loading: If the length of the steel bar is ≤1m, it can be operated by a single person. The short steel bars bundled together are lifted by a hook lock and directly suspended on the first hook (81) of the movable pulley block (6). If the length of the reinforcing bar is >1m, two people work together to tie the reinforcing bar on the ground with a longer binding wire rope and then suspend it on the first hook (81) of the movable pulley block (6). Tie a reset rope to the movable pulley block (6); Step Two, Enhancement Exercises: Start the winch (13), and calculate the traction force according to F=G / 4, where G is the total weight of the steel bars. The running path of the wire rope (14) is as follows: starting from the winch (13), it passes through the guide pulley (16), the second pulley (62) of the moving pulley group, the fixed pulley (10), the first pulley (61) of the moving pulley group, and finally the end is fixed to the second hook (12). The moving pulley group (6) rises at a constant speed along the through joint (41) of the I-beam slide (4). The bearing (19) of the I-beam buckle (7) ensures that the sliding resistance is ≤5N. Step 3: Unloading operation: When the reinforcing bar approaches the end of the I-beam slide (4) at a 30°±5° unloading section, the winch (13) slows down to 0.2-0.5m / s. For reinforcing bars with a length ≤1m, workers move them from the unloading section to the middle area of ​​the left or right reinforcing bar stacking area. For reinforcing bars with a length >1m, workers in the left stacking area place the reinforcing bars in the reinforcing bar enclosure, and the reinforcing bars in the unloading section automatically slide down to the right reinforcing bar stacking area. Step 4: Reset Operation The winch (13) reverses to release the wire rope (14), and the auxiliary pulling force of ≤10 kg is applied by the reset rope to pull the pulley block (6) back down.

8. The method of using the tunnel secondary lining steel reinforcement transport tool according to claim 7, characterized in that: The weight of steel bars to be hoisted in a single operation shall be ≤1000kg.

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