A dismantling device for tower cranes in construction projects

Abstract

This utility model relates to the field of crane dismantling technology, specifically a dismantling device for tower cranes in construction engineering, including a fixed frame and a steering device. The fixed frame is mounted on a wall, and a base is mounted on the fixed frame. The steering device includes two hydraulic cylinders mounted on the base, a drive block driven by the hydraulic cylinders, a frame mounted on the drive block, a drum rotatably connected to the frame, a gearbox and a motor mounted on the frame, and a guide mechanism mounted on the base. The guide mechanism includes a vertical frame mounted on the base, multiple support blocks mounted on the frame, two arc-shaped sliders mounted on the upper and lower support blocks, two partitions mounted on the vertical frame and located between adjacent support blocks, and multiple guide rods vertically distributed on the vertical frame and the base. This utility model can optimize the winding and unwinding effect of the drum on the traction rope, reduce the wear on the traction rope, and extend the overall life of the traction system.

Description

Technical Field

[0001] This utility model relates to the field of crane dismantling technology, and in particular to a dismantling device for tower cranes used in construction projects. Background Technology

[0002] Tower cranes, often simply called "tower cranes," are one of the most common and important heavy lifting equipment on construction sites. They are specifically designed to lift heavy building materials and transport them to the required locations, making them an indispensable piece of equipment for constructing high-rise buildings. After construction is completed, they require dismantling equipment for routine dismantling operations.

[0003] Chinese Patent No. CN223201486U discloses a dismantling device for tower cranes in construction projects, including a boom, a traction rope, an electric hoist, and a lower support plate. One end of the boom is equipped with an electric hoist, the middle of the boom is connected to one end of the traction rope, and the other end of the boom is rotatably connected to the lower support plate. The lower support plate is used for fixed connection to the structural wall. The other end of the traction rope is used to pull and control the boom to rotate around the connection point with the lower support plate. This device can rotatably fix one end of the boom to the structural wall above the tower crane using the lower support plate, and use the electric hoist at the other end of the boom to lift the tower crane's tower components. Simultaneously, by manually pulling the traction rope connected to the middle of the boom using manual or other driving mechanisms, the direction of the free end of the boom can be adjusted, thereby moving the tower components lifted by the electric hoist to another location for dismantling.

[0004] However, the above technical solution has the following shortcomings: when the device winds up the traction rope through the rope winding mechanism to realize the rotation of the boom, the bottom end of the drum can only rotate, causing the traction rope wound on the drum to pile up together, resulting in local diameter thinning and deformation, affecting the uniformity of the load-bearing capacity of the traction rope, and thus reducing the safety factor of the rope winding mechanism. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a dismantling device for tower cranes in construction engineering, which optimizes the winding and unwinding effect of the drum on the traction rope, reduces the wear on the traction rope, and extends the overall life of the traction system.

[0006] The present invention provides a dismantling device for a tower crane used in construction engineering, comprising a fixed frame and a steering device. The fixed frame is mounted on a wall and has a base. The steering device includes two hydraulic cylinders mounted on the base, a drive block connected to the hydraulic cylinders, a frame mounted on the drive block, a drum rotatably connected to the frame, a gearbox and a motor mounted on the frame, and a guide mechanism mounted on the base. The guide mechanism includes a vertical frame mounted on the base, multiple support blocks mounted on the frame, two arc-shaped sliders mounted on the upper and lower support blocks, two partitions mounted on the vertical frame and located between adjacent support blocks, and multiple guide rods vertically distributed on the vertical frame and the base. The support blocks and arc-shaped sliders are slidably connected to the vertical frame and the partitions, and the guide rods pass through the arc-shaped sliders and are slidably connected.

[0007] Preferably, two steel plates are provided on the wall, a support is provided on the outer steel plate, a latch is provided on the support, a rotatable lever is rotatably connected in the latch, a connecting buckle is provided on the lever, and a traction rope is provided between the drum and the connecting buckle.

[0008] Preferably, the drum is provided with a fastening hole for inserting a traction rope, and the end of the traction rope is tightened into the fastening hole by a screw.

[0009] Preferably, the support is provided with a third reinforcing plate, and the boom is provided with a mounting base for fixing the electric hoist.

[0010] Preferably, the base is provided with a mounting plate having a first reinforcing plate, the hydraulic cylinder is mounted on the mounting plate, and the first reinforcing plate is mounted on the base.

[0011] Preferably, a counterweight is provided on the side of the drive block away from the frame, and a second reinforcing plate is provided between the frame and the drive block.

[0012] Preferably, the base is provided with two symmetrically distributed columns, and the columns are provided with guide rings.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model, through its specially designed steering device, not only controls the steering operation of the boom, enabling the dismantling of tower cranes located at the junction of the podium and the main building, but also optimizes the traction rope that pulls the boom. By controlling the winding and unwinding speed of the drum to adapt to the vertical lifting speed of the drum, the rope wound on the drum is evenly distributed along the drum's axis, preventing the rope from being squeezed and piled up. At the same time, the guide ring prevents the rope from being severely worn due to large pulling amplitude during winding and unwinding. Furthermore, the guide mechanism fully ensures the stability of the vertical movement of the frame and the drum, demonstrating excellent practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the steering device of this utility model; Figure 3 This is a schematic diagram showing the connection between the guide mechanism and the frame of this utility model; Figure 4 This is a schematic diagram of the structure of an embodiment of the present utility model; Reference numerals: 1. Wall; 2. Fixing frame; 3. Base; 4. Hydraulic cylinder; 5. Drive block; 6. Frame; 7. Drum; 8. Gearbox; 9. Motor; 10. Stand; 11. Support block; 12. Arc-shaped slider; 13. Guide rod; 14. Partition plate; 15. Fastening hole; 16. Counterweight; 17. Mounting plate; 18. First reinforcing plate; 19. Second reinforcing plate; 20. Column; 21. Guide ring; 22. Steel plate; 23. Support; 24. Bayonet; 25. Digging rod; 26. Connecting buckle; 27. Mounting seat; 28. Third reinforcing plate. Detailed Implementation

[0015] Example 1, as Figure 1 - Figure 4 As shown in the figure, the dismantling device for tower cranes in construction engineering proposed in this embodiment includes a fixed frame 2 and a turning device; the fixed frame 2 is set on the wall 1, and a base 3 is set on the fixed frame 2. Two steel plates 22 are set on the wall 1. A support 23 is set on the outer steel plate 22. A bayonet 24 is set on the support 23. A derrick 25 is rotatably connected in the bayonet 24. A connecting buckle 26 is set on the derrick 25. A traction rope is set between the drum 7 and the connecting buckle 26. A mounting seat 27 for fixing and installing an electric hoist is set on the derrick 25. The mounting seat 27 is used to install the electric hoist. The end of the derrick 25 is connected to the bayonet 24 by a bearing rotation or movable riveting.

[0016] The steering device includes two hydraulic cylinders 4 mounted on the base 3, a drive block 5 driven by the hydraulic cylinders 4, a frame 6 mounted on the drive block 5, a drum 7 rotatably connected to the frame 6, a reduction gearbox 8 and a motor 9 mounted on the frame 6, and a guide mechanism mounted on the base 3. The guide mechanism includes a stand 10 mounted on the base 3, multiple support blocks 11 mounted on the frame 6, two arc-shaped sliders 12 mounted on the upper and lower support blocks 11, two partitions 14 mounted on the stand 10 and located between adjacent support blocks 11, and multiple guide rods 13 vertically distributed on the stand 10 and the base 3. The support blocks 11 and the arc-shaped sliders 12 are slidably connected to the stand 10 and the partitions 14. The guide rods 13 pass through the arc-shaped sliders 12 and are slidably connected. A counterweight 16 is provided on the side of the drive block 5 away from the frame 6. A second reinforcing plate 19 is provided between the frame 6 and the drive block 5. The counterweight 16 is used to ensure the gravity balance on both sides of the drive block 5, and the second reinforcing plate 19 is used to ensure the stability of the connection.

[0017] In this embodiment, the dismantling device is suitable for tower cranes located at the junction of the podium and the main building, solving the problem of inconvenience for tower crane dismantling operations using conventional truck cranes under special working conditions. When dismantling the crane is required, the position of the boom 25 is first adjusted by the steering device so that the electric hoist is above the lifting position. Then, the tower body component is lifted by the hook. The boom 25 is then rotated by the steering device to move the lifted tower body component to another position for dismantling. During the steering process, one side of the drum 7 is driven by the transmission structure in the reduction gearbox 8 through the motor 9 to rotate the drum 7, thereby winding the traction rope. The other side of the drum 7 is unwinding the rope through the motor 9. During the winding and unwinding process, the hydraulic cylinder 4 is activated to drive the drive block 5. The vertical movement drives the block 5 to move the drum 7 via the frame 6. The support block 11, arc-shaped slider 12, and upright frame 10 provide guidance and stability for the lifting and lowering of the frame 6. The guide rod 13 provides dual guidance, and the partition 14 distributes and supports the radial tension of the traction rope on the drum 7, ensuring the stability of the frame 6 and drum 7 during vertical movement. This allows the rope wound on the drum 7 to be evenly distributed along the axis of the drum 7, while maintaining the horizontal height of the traction rope and the winding and unwinding points of the drum 7 within a certain range. This ensures the overall structural stability when the rope turns, avoiding the drawbacks of severe pulling and wear on the rope during winding and unwinding, and has good practicality.

[0018] It should be noted that: the motor 9 and hydraulic cylinder 4 adopt adaptive algorithms and precision sensor feedback technology to achieve synchronous control of the rotation speed and lifting speed of the drum 7, so that the winding and unwinding speed of the drum 7 during the winding and unwinding of the traction rope is adapted to the vertical lifting speed of the drum 7; the hydraulic cylinder 4 is a double-acting heavy-duty cylinder with a built-in displacement sensor, and uses hydraulic diversion technology and a PLC plus motion control card controller to achieve synchronous control of the two drums 7, that is, one is winding the rope and the other is unwinding the rope. The bidirectional hydraulic lock, in conjunction with the proportional valve, can lock the position of the drum 7 and prevent the drum 7 from sliding down when pressure is lost. This technology, along with the aforementioned adaptive algorithm and sensor feedback technology, are all existing mature technologies. This part is not the innovative content of this application. The technical effect of this application is achieved entirely through the aforementioned mechanical structure improvement. The specific implementation method of the electronic control system does not affect the novelty and inventiveness of this solution.

[0019] Example 2, as Figure 2 - Figure 4 As shown, this embodiment proposes a dismantling device for a tower crane in construction engineering. Compared with the first embodiment, in this embodiment, the base 3 is provided with two symmetrically distributed columns 20, and the columns 20 are provided with guide rings 21; the drum 7 is provided with fastening holes 15 for inserting traction ropes, and the end of the traction rope is tightened into the fastening holes 15 by screws; the support 23 is provided with a third reinforcing plate 28.

[0020] In this embodiment, the two uprights 20 are at the same height to ensure that the inflection points of the traction ropes on both sides are at the same height. Meanwhile, the guide ring 21 is made of high-chromium cast iron, a high-performance substrate that has undergone surface hardening and finishing treatment, which results in a low wear rate between the guide ring 21 and the traction rope, extending the overall life of the traction system. The fastening hole 15, in conjunction with the screw, can conveniently and stably fix one end of the traction rope to the frame 6. The third reinforcing plate 28 is used to improve the structural strength of the support 23 located on the steel plate 22, thereby ensuring stability.

[0021] Example 3, as Figure 1 and Figure 2 As shown in the figure, this embodiment proposes a dismantling device for a tower crane in construction engineering. Compared with the first embodiment, in this embodiment, the base 3 is provided with a mounting plate 17 having a first reinforcing plate 18, the hydraulic cylinder 4 is provided on the mounting plate 17, the first reinforcing plate 18 is provided on the base 3, and bolts are provided through the steel plate 22 and the fixing frame 2. After the bolts pass through the wall 1, they are tightened by locking nuts to fix the fixing frame 2 and the steel plate 22.

[0022] In this embodiment, the mounting plate 17 and the first reinforcing plate 18 are used to support and fix the hydraulic cylinder 4 while ensuring structural strength, while the steel plate 22 and the fixing frame 2 are fixed by bolts and lock nuts to realize the installation and disassembly operation of the dismantling device.

[0023] It should be noted that the main structure of the demolition device in this application, including the material selection and layout design of the main structure such as the support 23, the bayonet 24, the derrick 25 and the distribution of the traction rope, all adopt the design scheme of the utility model with patent publication number CN223201486U.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A dismantling device for tower cranes in construction projects, characterized in that, include: A fixing frame (2) is installed on the wall (1), and a base (3) is installed on the fixing frame (2); The steering device includes two hydraulic cylinders (4) mounted on the base (3), a drive block (5) driven by the hydraulic cylinders (4), a frame (6) mounted on the drive block (5), a drum (7) rotatably connected to the frame (6), a gearbox (8) and a motor (9) mounted on the frame (6), and a guide mechanism mounted on the base (3). The guide mechanism includes a stand (10) mounted on the base (3), multiple support blocks (11) mounted on the frame (6), two arc-shaped sliders (12) mounted on the upper and lower support blocks (11), two partitions (14) mounted on the stand (10) and located between adjacent support blocks (11), and multiple guide rods (13) vertically distributed on the stand (10) and the base (3). The support blocks (11) and the arc-shaped sliders (12) are slidably connected to the stand (10) and the partitions (14), and the guide rods (13) pass through the arc-shaped sliders (12) and are slidably connected.

2. The dismantling device for tower cranes in construction engineering according to claim 1, characterized in that, Two steel plates (22) are installed on the wall (1). A support (23) is installed on the outer steel plate (22). A slot (24) is installed on the support (23). A rotatable rod (25) is connected inside the slot (24). A connecting buckle (26) is installed on the rotatable rod (25). A traction rope is installed between the drum (7) and the connecting buckle (26).

3. A dismantling device for tower cranes in construction engineering according to claim 2, characterized in that, The drum (7) is provided with a fastening hole (15) for inserting the traction rope, and the end of the traction rope is tightened into the fastening hole (15) by a screw.

4. A dismantling device for tower cranes in construction engineering according to claim 2, characterized in that, A third reinforcing plate (28) is provided on the support (23), and a mounting base (27) for fixing the electric hoist is provided on the derrick (25).

5. A dismantling device for tower cranes in construction engineering according to claim 1, characterized in that, A mounting plate (17) with a first reinforcing plate (18) is provided on the base (3), a hydraulic cylinder (4) is provided on the mounting plate (17), and the first reinforcing plate (18) is provided on the base (3).

6. A dismantling device for tower cranes in construction engineering according to claim 1, characterized in that, A counterweight (16) is provided on the side of the drive block (5) away from the frame (6), and a second reinforcing plate (19) is provided between the frame (6) and the drive block (5).

7. A dismantling device for tower cranes in construction engineering according to claim 1, characterized in that, The base (3) is provided with two symmetrically distributed columns (20), and the columns (20) are provided with guide rings (21).

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