A prefabricated retaining wall hoisting device

Abstract

This utility model discloses a hoisting device for prefabricated retaining walls. This application relates to the field of lifting equipment, specifically a hoisting device for prefabricated retaining walls. It comprises a main beam, a pulley system mounted on the main beam, and ropes. The pulley system includes multiple pulleys spaced apart on the main beam. The ropes slide through the multiple pulleys, with both ends used to suspend the prefabricated retaining wall. When the hoisting is eccentrically loaded, the ropes can slide freely within the pulley system, automatically aligning the center of gravity of the prefabricated retaining wall with the hoisting position. The beneficial effects of this utility model are: by setting a pulley system on the main beam, the rigid constraints of traditional single-point hoisting are broken. When hoisting an eccentrically loaded retaining wall, uneven force drives the ropes to slide freely within the pulley system, automatically lowering the heavier side until the overall center of gravity is perpendicular to the crane's main hook, automatically achieving mechanical balance and solving the pendulum-like swaying problem during hoisting.

Description

Technical Field

[0001] This application relates to the field of lifting equipment, specifically a prefabricated retaining wall lifting device. Background Technology

[0002] Prefabricated retaining walls are retaining structures made by prefabricating components in a factory and assembling them on site. They are widely used in road, water conservancy, and municipal engineering projects, and have advantages such as high construction efficiency, stable quality, and environmental friendliness and energy saving. Compared with traditional cast-in-place structures, they can significantly shorten the construction period, reduce on-site work, and support standardized design and rapid assembly.

[0003] In actual assembly, cranes are mostly used for lifting and transporting. However, the center of gravity of prefabricated retaining walls often exhibits systematic eccentricity due to uneven reinforcement and misaligned hoisting holes. After connecting ropes to lifting points, the crane hook lifts the ropes and the prefabricated retaining wall together. Because the lifting points are concentrated at a single hook point, and the prefabricated retaining wall is relatively heavy, an eccentric moment is generated during lifting due to the deviation between the lifting point and the center of gravity, resulting in pendulum-like swaying. Furthermore, it is difficult to align the lifting position with the center of gravity line of the prefabricated retaining wall, further exacerbating the swaying. Therefore, under the combined effects of inertia, uneven center of gravity distribution, and external forces, the prefabricated retaining wall may rotate at the hook position during hoisting, posing a potential threat to stability and safety. Utility Model Content

[0004] In order to automatically calibrate the center of gravity position of the components and the hoisting position during the hoisting process of prefabricated retaining walls, the purpose of this application is to provide a hoisting device for prefabricated retaining walls.

[0005] The prefabricated retaining wall hoisting device provided in this application adopts the following technical solution:

[0006] A prefabricated retaining wall hoisting device includes a main beam, a pulley block mounted on the main beam, and ropes. The pulley block includes multiple pulleys spaced apart on the main beam. The ropes slide through the multiple pulleys and are used to suspend the prefabricated retaining wall. When the hoisting is eccentrically loaded, the ropes can slide freely within the pulley block, allowing the center of gravity of the prefabricated retaining wall to automatically align with the hoisting position. By adopting this technical solution and utilizing the free sliding characteristic of the ropes within the pulley block, the eccentric load automatically finds its equilibrium point under gravity, avoiding initial hoisting tilt and pendulum-like swaying caused by eccentric center of gravity, thus improving the initial stability of the hoisting process.

[0007] Preferably, the system further includes a leveling device installed on the main beam. This leveling device is connected to a rope and is used to adjust the winding amount at both ends of the rope to change the horizontal orientation of the prefabricated retaining wall. The horizontal position of the prefabricated retaining wall is controlled by the leveling device.

[0008] Preferably, an anti-sway component is provided between the main beam and the prefabricated retaining wall. One end of the anti-sway component is hinged to the prefabricated retaining wall, and the other end is hinged to the main beam. The anti-sway component controls the stability of the prefabricated retaining wall during the hoisting process and prevents the prefabricated retaining wall from swaying significantly.

[0009] Preferably, the pulley block includes a first fixed pulley, a second fixed pulley, and a main pulley; the main pulley is located between the first and second fixed pulleys, and its height is lower than that of the first and second fixed pulleys. By adopting the above technical solution, the three fixed pulleys form a stable three-point guiding topology, distributing the concentrated load of the prefabricated retaining wall to different positions of the main beam, thus improving the stress distribution of the main beam.

[0010] Preferably, the pulley block further includes a first movable pulley and a second movable pulley, both of which are lower than the first fixed pulley and the second fixed pulley, and both the first movable pulley and the second movable pulley are provided with hooks.

[0011] Preferably, the first fixed pulley is located between the first movable pulley and the main pulley, and the second fixed pulley is located between the second movable pulley and the main pulley. By adopting the above technical solution, it is ensured that the rope converges from both sides to the center, providing a symmetrical and reasonable physical movement path for the rope's slippage and alignment.

[0012] Preferably, the rope slides through all the pulleys of the pulley block, and the rope is indirectly connected to the pre-embedded lifting point through hooks on the first and second movable pulleys.

[0013] Preferably, the leveling device is located at both ends of the main beam, and the leveling devices at both ends of the main beam are respectively connected to both ends of the rope. The leveling device controls the amount of rope winding.

[0014] Preferably, the leveling device includes an electric winch, the cable of which is connected to a rope. By using an electric winch to wind up the rope, the prefabricated retaining wall on the lighter side is leveled.

[0015] Preferably, the anti-sway components are installed on both sides of the main beam and located at the outermost end of the main beam. The anti-sway components are telescopic hydraulic damping rods. The hydraulic damping rods allow slow displacement but not rapid displacement, thereby preventing rapid swaying during hoisting.

[0016] Compared with existing technologies, the advantages of this application are as follows:

[0017] 1. By installing pulley blocks on the main beam, the rigid constraints of traditional single-point hoisting are broken. When hoisting an eccentric retaining wall, the uneven force will cause the rope to slide freely in the pulley blocks, and the heavier side will automatically descend until the overall center of gravity is vertically below the crane's main hook, automatically achieving mechanical balance and solving the problem of pendulum-like swaying at the moment of hoisting.

[0018] 2. By setting up hydraulic damping rods, the rotational freedom of the prefabricated retaining wall in the horizontal plane is effectively constrained, preventing large swaying during the hoisting process and improving the torsional stability of the hoisting process.

[0019] 3. The rope is wound up using a leveling device, which actively changes the lever arm of the lighter end of the suspension point without altering the pulley position. Based on the principle of torque balance, real-time leveling under load can be achieved, meeting the stringent requirements for horizontal alignment accuracy in prefabricated components. Attached Figure Description

[0020] Appendix Figure 1 This is a side view of the hoisting device in this application.

[0021] Appendix Figure 2 This is a side view of the rope routing path of the pulley block in this application.

[0022] Appendix Figure 3 This is a view of the retaining wall after its center of gravity has been automatically adjusted.

[0023] Appendix Figure 4 This is the view of the retaining wall in this application after the center of gravity has been automatically adjusted and leveled.

[0024] The labels shown in the attached diagram:

[0025] 1. Main beam; 2. Rope; 3. First fixed pulley; 4. Second fixed pulley; 5. Main pulley; 6. First movable pulley; 7. Second movable pulley; 8. Electric winch; 9. Hydraulic damping rod. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0027] The present application describes a prefabricated retaining wall hoisting device, the main structure of which includes a main beam 1, a pulley block installed on the main beam 1, and ropes 2;

[0028] The pulley block includes multiple pulleys spaced apart on the main beam 1; the rope 2 slides through the multiple pulleys, and the two ends of the rope 2 are used to suspend the prefabricated retaining wall; when the lifting is eccentrically loaded, the rope 2 can slide freely in the pulley block so that the center line of gravity of the prefabricated retaining wall automatically coincides with the lifting position.

[0029] When hoisting prefabricated retaining walls, the background section analyzes the situation where the crane directly hoists the prefabricated retaining wall and causes rotation. This is mainly because the hook's lifting of the prefabricated retaining wall is concentrated at a single point, and the lifting position is not aligned with the gravity line of the prefabricated retaining wall. During the swinging process after hoisting, rotation and swaying occur, affecting the stability of the hoisting process. Therefore, a pulley system is installed on the main beam 1 to solve the above problems. The specific structure is as follows:

[0030] The pulley system includes a first fixed pulley 3, a second fixed pulley 4, a main pulley 5, a first movable pulley 6, and a second movable pulley 7. All pulleys in the pulley system have anti-slip features. The main pulley 5 is also a fixed pulley. All three fixed pulleys of the pulley system are fixedly connected to the main beam 1. The pulleys of the pulley system on the main beam 1 are spaced apart. The positional relationship of the pulley system is shown in the attached figure. Figure 2 As shown, the main pulley 5 is located between the first fixed pulley 3 and the second fixed pulley 4. The height of the main pulley 5 is lower than that of the first fixed pulley 3 and the second fixed pulley 4. This has the advantage that when the prefabricated retaining wall is lifted, the tension on the first fixed pulley 3 and the second fixed pulley 4 causes the rope 2 to press tightly against the main pulley 5, increasing the wrap angle of the rope 2 on the main pulley 5, preventing the rope 2 from slipping out of its groove, and improving the bending moment distribution of the main beam 1. The first fixed pulley 3 is located between the first movable pulley 6 and the main pulley 5, and the second fixed pulley 4 is located between the second movable pulley 7 and the main pulley 5.

[0031] Both the first movable pulley 6 and the second movable pulley 7 are lower than the first fixed pulley 3 and the second fixed pulley 4, and both the first movable pulley 6 and the second movable pulley 7 are equipped with hooks. The rope 2 slides through all the pulleys of the pulley group. The rope 2 is indirectly connected to the pre-embedded lifting points through the hooks on the first movable pulley 6 and the second movable pulley 7. The pre-embedded lifting points are pre-embedded lifting holes in the prefabricated retaining wall, and the holes are equipped with pre-embedded lifting rings. The rope 2 is fixedly connected to the leveling device described below. The route of the rope 2 is as follows: one end of the rope 2 is connected to the leveling device on the left side of the main beam 1 → passes downward through the first movable pulley 6 → passes upward around the first fixed pulley 3 on the main beam 1 → crosses diagonally upward across the main pulley 5 at the center of the main beam 1 → crosses diagonally downward across the second fixed pulley 4 on the right side of the main beam 1 → passes downward through the second movable pulley 7 → finally, the other end of the rope 2 is connected to the leveling device on the right side of the main beam 1.

[0032] After the first movable pulley 6 and the second movable pulley 7 are attached to the lifting points of the prefabricated retaining wall, the rope 2, under the control of the leveling device, is in a fixed length connection state. When lifting the prefabricated retaining wall, due to the uneven load on the first movable pulley 6 and the second movable pulley 7, the rope 2 will slide freely in the pulley system. The heavier side will automatically descend until the overall center of gravity of the prefabricated retaining wall is exactly perpendicular to the hook of the crane above, achieving adaptive mechanical balance, so that the center line of gravity of the prefabricated retaining wall coincides with the lifting position of the crane. At this time, the lifting and transportation process of the prefabricated retaining wall will be more stable.

[0033] Although the center line of gravity of the prefabricated retaining wall coincides with the lifting position of the crane at this time, swaying still occurs during the lifting process, so further improvements are needed: Anti-swaying components are installed between the main beam 1 and the prefabricated retaining wall. One end of the anti-swaying component is hinged to a pre-embedded point on the prefabricated retaining wall, and the other end is hinged to the main beam 1. Two additional pre-embedded points on the prefabricated retaining wall need to be hinged to the anti-swaying components. The anti-swaying components are located on both sides of the main beam 1 and are telescopic hydraulic damping rods 9. One end of each hydraulic damping rod 9 is hinged to the lifting lugs at both ends of the main beam 1, and the other end of each hydraulic damping rod 9 is angled downwards and hinged to the pre-embedded points at the corners of both ends of the retaining wall. The hydraulic damping rod 9 contains a damping piston filled with hydraulic oil, allowing slow displacement, corresponding to the posture changes of the retaining wall during active leveling as described above, but providing strong damping force for rapid movements (corresponding to swinging and rotation). The hydraulic damping rod 9 has hinged ends and its length can be extended or retracted. Therefore, the hydraulic damping rod 9 does not restrict the degree of freedom of the prefabricated retaining wall to tilt, does not affect the self-adaptive leveling mentioned above, and can work simultaneously without interfering with each other.

[0034] The above process automatically adjusts the center of gravity to match the crane's lifting position. After the crane lifts the prefabricated retaining wall to a specific position, because the prefabricated retaining wall sections need to be assembled together to achieve the soil-retaining effect, the assembly accuracy will affect the water-stopping effect of the prefabricated retaining wall. Therefore, after the prefabricated retaining wall is smoothly lifted to the designated position by the crane, its position is finely adjusted. Further improvements include a leveling device installed on the main beam 1, with one leveling device at each end of the main beam 1. The leveling device includes an electric winch 8 and a connecting buckle. The cable of the electric winch 8 is connected to the rope 2 through the connecting buckle. The electric winch 8 is a locking electric winch 8. The electric winch 8 at the lighter end winds up the cable, while the electric winch 8 at the heavier end locks it, causing the rope 2 to slide in the pulley system, reducing the amount of rope 2 wound in the pulley system, and leveling the retaining wall at the lighter end, thus making the prefabricated retaining wall in a horizontal position, and then connecting it with other prefabricated retaining walls.

[0035] The main principle of this application is as follows: When hoisting the prefabricated retaining wall using a pulley system, the rope 2 slides inside the pulley system, thereby automatically adjusting the position of the prefabricated retaining wall according to its center of gravity distribution. During the transport process, it works together with the hydraulic damping rods 9 on both sides of the main beam 1 to control the stability of the prefabricated retaining wall, thereby preventing it from tilting or rotating significantly. After the prefabricated retaining wall is moved to the assembly position, the electric winch 8 at the lighter end winds up the cable, while the electric winch 8 at the heavier end locks it, causing the rope 2 to slide in the pulley system, reducing the amount of rope 2 wound up in the pulley system, and leveling the retaining wall at the lighter end, thus placing the prefabricated retaining wall in a horizontal position, and then connecting it with other prefabricated retaining walls.

[0036] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A prefabricated retaining wall hoisting device, comprising a main beam, characterized in that: It also includes pulley blocks and ropes installed on the main beam; The pulley system includes a plurality of pulleys spaced apart on the main beam; The rope is slidably threaded through the plurality of pulleys and is used to suspend the prefabricated retaining wall. When the lifting is eccentrically loaded, the rope can slide freely in the pulley group so that the center line of gravity of the prefabricated retaining wall automatically coincides with the lifting position.

2. The prefabricated retaining wall hoisting device according to claim 1, characterized in that: It also includes a leveling device installed on the main beam, which is connected to a rope and is used to adjust the amount of winding at both ends of the rope to change the horizontal posture of the prefabricated retaining wall.

3. The prefabricated retaining wall hoisting device according to claim 1 or 2, characterized in that: An anti-swaying component is provided between the main beam and the prefabricated retaining wall. One end of the anti-swaying component is hinged to the prefabricated retaining wall, and the other end is hinged to the main beam.

4. The prefabricated retaining wall hoisting device according to claim 3, characterized in that: The pulley system includes a first fixed pulley, a second fixed pulley, and a main pulley; The main pulley is located between the first fixed pulley and the second fixed pulley, and the height of the main pulley is lower than that of the first fixed pulley and the second fixed pulley.

5. The prefabricated retaining wall hoisting device according to claim 4, characterized in that: The pulley assembly also includes a first movable pulley and a second movable pulley. Both the first movable pulley and the second movable pulley are lower than the first fixed pulley and the second fixed pulley, and both the first movable pulley and the second movable pulley are equipped with hooks.

6. The prefabricated retaining wall hoisting device according to claim 5, characterized in that: The first fixed pulley is located between the first movable pulley and the main pulley, and the second fixed pulley is located between the second movable pulley and the main pulley.

7. The prefabricated retaining wall hoisting device according to claim 6, characterized in that: The rope slides through all the pulleys of the pulley block, and the rope is indirectly connected to the pre-embedded lifting point through the hooks on the first and second movable pulleys.

8. The prefabricated retaining wall hoisting device according to claim 2, characterized in that: The leveling devices are installed at both ends of the main beam, and the leveling devices at both ends of the main beam are respectively connected to both ends of the rope.

9. The prefabricated retaining wall hoisting device according to claim 8, characterized in that: The leveling device includes an electric winch, the cable of which is connected to a rope.

10. The prefabricated retaining wall hoisting device according to claim 3, characterized in that: The anti-sway components are installed on both sides of the main beam and located at the outermost end of the main beam. The anti-sway components are telescopic hydraulic damping rods.

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