A multi-segment steel arch tower positioning and hoisting device and method

Abstract

The present invention relates to the technical field of hoisting devices. More specifically, it relates to a multi-segment steel arch tower positioning hoisting device and method, which includes a hoisting frame for cooperating with a crane to perform hoisting and positioning operations on the arch tower closing segment. A fixed shaft is fixedly installed between the front and rear inner walls of the hoisting frame. On the outside of the fixed shaft, there are two symmetric triangular hoisting parts in the front and rear. The two triangular hoisting parts cooperate with each other to fix the front and rear sides of the arc top and the two arc bottoms of the arch tower closing segment. Through the cooperation of the three-point positioning component and the three-side strengthening component, the present invention fixes the front and rear sides of the arc top and the two arc bottoms of the arch tower closing segment, forming a stable three-dimensional triangular positioning hoisting structure. Through the mechanical properties of the triangular structure, the loads generated during the hoisting process are evenly distributed to each position of the three-dimensional triangular positioning hoisting structure, avoiding stress concentration caused by excessive local stress, and significantly reducing unstable phenomena such as inclination and torsion of the arch tower closing segment during the hoisting process.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting devices, and more specifically, it relates to a positioning hoisting device and method for multi-segment steel arch towers. Background Art

[0002] In the field of bridge construction, with the innovation of design concepts and the development of engineering technologies, complex curve steel arch tower structures have been increasingly widely used in large bridge projects due to their unique aesthetic effects and good mechanical properties. Among them, the closure segment of the arch tower is a key connecting part of the arch tower structure, and the quality and safety of its hoisting construction are directly related to the stability and service life of the entire bridge.

[0003] In the prior art, before hoisting operations, a temporary truss is first installed on the inner wall of the arch tower closure segment to support the inner wall of the arch tower closure segment to prevent it from deforming under stress. Then, a crawler crane single-side standing installation method is adopted and the hoisting sequence of first far then near and then closing is followed to lift the arch tower closure segment to above the designated position (i.e., both side segments), and then slowly lower it. Finally, the arch tower closure segment is welded and connected to the two side segments. However, the existing hoisting technologies still have the following problems when dealing with the hoisting of complex curve steel arch tower closure segments: 1. The current hoisting method uses a two-point hoisting method, that is, two opposite ear plates front and back are one hoisting point, and one hoisting point on each side. When facing components such as the arch tower closure segment with complex curves and irregular shapes, it cannot provide sufficient constraints to resist the displacement and rotation of the arch tower closure segment in all directions, making it difficult for the closure segment to remain stable under the action of external forces such as gravity and wind, and unable to effectively disperse the loads generated during the hoisting process. Moreover, since it is difficult to accurately determine the center of gravity of the arch tower closure segment, it is easy to cause uneven stress on the arch tower closure segment, and thus unstable phenomena such as tilting and torsion occur during the hoisting process, which not only affects the construction progress but also poses a potential threat to the structural integrity of the arch tower closure segment.

[0004] 2. Before hoisting operations, although the installed temporary truss can play a role in internal support and anti-deformation, the separately set temporary truss only provides support by relying on its own contact with the arch tower closure segment during the hoisting process. When facing complex external forces (such as wind force, ground vibration, etc.), it is difficult to jointly resist and disperse the loads, resulting in unstable phenomena such as shaking, tilting, and even torsion of the arch tower closure segment. Moreover, a large amount of time and manpower are required for the handling, assembly, debugging, installation, etc. of the temporary truss before each hoisting, and after the hoisting is completed, it is necessary to disassemble, clean, and store it, thus greatly increasing the construction procedures and time costs. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a multi-segment steel arch tower positioning and hoisting device and method, including a hoisting frame for cooperating with a crane to perform hoisting and positioning operations on the arch tower closing section. A fixed shaft is fixedly installed between the front and rear inner walls of the hoisting frame. On the outer side of the fixed shaft, there are two triangular hoisting parts symmetrically arranged front and back. The two triangular hoisting parts cooperate with each other to fix the front and back sides of the arc top and the two arc bottoms of the arch tower closing section. The triangular hoisting part includes a three-point positioning component and a driving component for driving the three-point positioning component.

[0006] Below the fixed shaft, there is a three-sided strengthening component for internally supporting the inner side of the arch tower closing section and a control component for controlling the three-sided strengthening component. The three-sided strengthening component and the three-point positioning component cooperate to form a three-dimensional triangular structure to strengthen the positioning strength of the arch tower closing section.

[0007] Inside the hoisting frame, there is an adjusting component for adjusting the horizontal position of the three-sided strengthening component. After the adjusting component moves the three-sided strengthening component into the inner side of the arch tower closing section, the driving component drives the three-point positioning component to be adjusted to a state where it is aligned with the three hoisting holes on the arch tower closing section. At the same time, the driving component will synchronously control the three-sided strengthening component to internally support the arch tower closing section through the control component, forming a three-dimensional triangular multi-stage strengthening positioning hoisting structure.

[0008] Furthermore, a lifting part is jointly arranged at the tops of the two triangular hoisting parts. The lifting part is used to cooperate with the hoisting frame to perform hoisting operations on the arch tower closing section after being positioned and strengthened by the triangular multi-stage.

[0009] Furthermore, the three-point positioning component includes two hinged rods that are hinged on the outer side of the fixed shaft and are arranged in a V shape. Pin holes that penetrate through the front and back are provided on both the hinged rods and the hoisting frame. After the three-point positioning component is adjusted to a state where it is aligned with the three hoisting holes on the arch tower closing section, a hoisting fixing pin is passed through the pin holes and fixedly inserted into the corresponding hoisting holes on the arch tower closing section for three-point positioning.

[0010] Furthermore, the hoisting frame is composed of a horizontal section at the top and two vertically arranged Z-shaped sections symmetrically connected to the bottom of the horizontal section. The driving component includes an upper hydraulic cylinder fixedly installed on the inner wall at the bent part of the Z-shaped section of the hoisting frame and a driving frame fixedly installed at the output end of the upper hydraulic cylinder.

[0011] Furthermore, two driving chutes are symmetrically arranged left and right on the driving frame. On the side of the hinged rod close to the driving frame, a driving slide rod is fixedly installed and slidably matched with the corresponding driving chute.

[0012] Further, the adjusting assembly includes side hydraulic cylinders fixedly installed on the front and rear inner walls of the hoisting frame through support plates. The side hydraulic cylinders are all located below the fixed shaft. The three-sided strengthening assembly includes an outer truss fixedly installed at the output end of the side hydraulic cylinders. A number of guiding pulley groups are fixedly installed on the inner side of the outer truss and are evenly distributed along the length direction of the outer truss.

[0013] Further, the number of guiding pulley groups is divided into several groups. Each group consists of four guiding pulleys distributed in a rectangular shape. Two inner trusses that are symmetric left and right are slidably installed together among the number of guiding pulley groups. The driving assembly controls the left and right inner trusses to move away from each other through the control assembly, so as to provide internal support for the inner side of the closed section of the arch tower.

[0014] Further, the control assembly includes a V-shaped frame fixedly installed on the top of the inner truss and a compression sliding rod fixedly installed on the side of the V-shaped frame close to the corresponding side hydraulic cylinder. A follower plate is fixedly installed on the side of the driving frame close to the compression sliding rod. Two inclined extrusion chutes that are symmetric left and right and slidably cooperate with the corresponding compression sliding rods are provided on the follower plate.

[0015] Further, the lifting part includes a connecting frame fixedly installed between two front and rear hinge rods and a lifting rope fixedly installed on the inner wall of the connecting frame close to the hinge rod. Before lifting, the lifting rope is sleeved on the closed section of the arch tower to increase the lifting force application points and improve the lifting stability. Four connecting ropes distributed in a rectangular shape are jointly installed between the connecting frame and the top inner wall of the hoisting frame.

[0016] The present invention also provides a usage method of a multi-section steel arch tower positioning and hoisting device, which is completed in cooperation with the above-mentioned multi-section steel arch tower positioning and hoisting device, and includes the following steps: S1. Hoisting preparation: Connect the hoisting frame to the crane with a steel wire rope, control the crane to move the hoisting frame directly above the closed section of the arch tower and lower it, so that the hoisting frame is located outside the closed section of the arch tower. Pass the lifting rope through the inner wall of the closed section of the arch tower and wind it around once, and then fix it on the connecting frame to complete the preliminary fixation.

[0017] S2. Three-sided strengthening in place: Move the three-sided strengthening assembly into the inner side of the closed section of the arch tower through the adjusting assembly to provide a basis for the internal support of the closed section of the arch tower.

[0018] S3. Three-point positioning and internal support: Drive the three-point positioning assembly through the driving assembly to adjust to a state where it is aligned with the three hoisting holes on the closed section of the arch tower, and then insert the hoisting fixing pins to complete the three-point positioning. At the same time, the driving assembly makes the three-sided strengthening assembly provide internal support for the closed section of the arch tower through the control assembly.

[0019] S4. Hoisting operation: Start the crane, hoist the closed section of the arch tower through the triangular hoisting part and the lifting part. During the hoisting process, utilize the stability of the three-dimensional triangular multi-stage strengthening positioning and hoisting structure to ensure that the closed section of the arch tower rises smoothly for hoisting operation.

[0020] The beneficial effects of the present invention are as follows: 1. By the cooperation of the three-point positioning component and the three-side strengthening component, the present invention fixes the front and rear sides of the arc top and the two arc bottoms of the closed section of the arch tower, forming a stable three-dimensional triangular positioning and hoisting structure. Through the mechanical properties of the triangular structure, the loads generated during the hoisting process are evenly dispersed to each position of the three-dimensional triangular positioning and hoisting structure, avoiding stress concentration caused by excessive local stress, and being able to effectively resist displacement and rotation under the action of external forces such as gravity and wind. In the face of complex construction environments and external interferences, the unstable phenomena such as inclination and torsion of the closed section of the arch tower during hoisting can be greatly reduced, ensuring construction safety, ensuring the smooth progress of the hoisting operation, and also reducing safety risks.

[0021] 2. By the cooperation of the inner truss with the three-point positioning component and the three-side strengthening component, a complete, closed and highly stable three-dimensional triangular positioning structure is formed. The triangular hoisting part provides the main positioning support points by fixing the front and rear sides of the arc top and the two arc bottoms of the closed section of the arch tower and forms external multi-directional fixed limits, while the inner truss provides internal support for the closed section of the arch tower from the inside. The synergistic effect of the inner truss and the triangular hoisting part further enhances the rigidity of the entire hoisting device, and reduces the time involved in handling, assembling, debugging, disassembling, etc. during the hoisting of the inner truss, greatly improving the hoisting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the state diagram when the present invention hoists the closed section of the arch tower.

[0023] Figure 2 is the three-dimensional structure schematic diagram of the three-point positioning component, the three-side strengthening component, the driving component and the control component of the present invention.

[0024] Figure 3 is the three-dimensional structure schematic diagram of the side hydraulic cylinder, the limiting plate, the limiting rod and the V-shaped frame of the present invention.

[0025] Figure 4 is the three-dimensional structure schematic diagram of the articulated rod, the pin hole, the hoisting frame, the connecting rope and the connecting frame of the present invention.

[0026] Figure 5 is the three-dimensional structure schematic diagram of the driving frame, the driving chute, the driving slide rod and the lifting rope of the present invention.

[0027] Figure 6 is the three-dimensional structure schematic diagram of the V-shaped frame, the compression slide rod, the follower plate, the extrusion chute and the side hydraulic cylinder of the present invention.

[0028] Figure 7 is the three-dimensional structure schematic diagram of the side hydraulic cylinder, the limiting plate, the limiting rod and the outer truss of the present invention.

[0029] In the figure: 1. Closed section of the arch tower; 2. Hoisting frame; 3. Triangular hoisting part; 31. Three-point positioning component; 311. Hinge rod; 312. Pin shaft hole; 32. Driving component; 321. Upper hydraulic cylinder; 322. Driving frame; 323. Driving chute; 324. Driving slide rod; 33. Three-side strengthening component; 331. Outer truss; 332. Guide pulley group; 333. Inner truss; 34. Control component; 341. V-shaped frame; 342. Compression slide rod; 343. Follow-up plate; 344. Extrusion chute; 35. Adjustment component; 351. Side hydraulic cylinder; 352. Limit plate; 353. Limit rod; 4. Lifting part; 41. Connecting frame; 42. Connecting rope; 43. Lifting rope; 5. Fixed shaft. Detailed implementation mode

[0030] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that the discussion of these embodiments is for the purpose of enabling those skilled in the art to better understand and thus implement the subject matter described herein. Changes can be made to the functions and arrangements of the elements discussed without departing from the scope of protection of the content of this specification. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0031] Refer to Figure 1 and Figure 2 A multi-segment steel arch tower positioning and hoisting device includes a hoisting frame 2 for cooperating with a crane to hoist and position the closed section 1 of the arch tower. A fixed shaft 5 is fixedly installed between the front and rear inner walls of the hoisting frame 2. On the outer side of the fixed shaft 5, there are two symmetric triangular hoisting parts 3 arranged front and rear. The two triangular hoisting parts 3 cooperate to fix the front and rear sides of the crown and the two arc bottoms of the closed section 1 of the arch tower. The triangular hoisting part 3 includes a three-point positioning component 31 and a driving component 32 for driving the three-point positioning component 31.

[0032] Refer to Figure 2 、 Figure 4 and Figure 5 The three-point positioning component 31 includes two hinge rods 311 that are hinged on the outer side of the fixed shaft 5 and are arranged in a V shape. Pin shaft holes 312 that penetrate through the front and rear are provided on both the hinge rods 311 and the hoisting frame 2. After the three-point positioning component 31 is adjusted to be aligned with the three hoisting holes on the closed section 1 of the arch tower, a hoisting fixing pin is passed through the pin shaft hole 312 and fixedly inserted into the corresponding hoisting hole on the closed section 1 of the arch tower for three-point positioning.

[0033] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4The tops of the two triangular hoisting parts 3 are jointly provided with a hoisting part 4, which is used to cooperate with the hoisting frame 2 to hoist the closed section 1 of the arch tower after the triangular multi-stage reinforcement positioning. The hoisting part 4 includes a connecting frame 41 fixedly installed between two hinged rods 311 opposite to each other in the front and back, and a pulling rope 43 fixedly installed on the inner wall of the connecting frame 41 close to the hinged rod 311. Before hoisting, the pulling rope 43 is sleeved on the closed section of the arch tower 1 to increase the hoisting force point and improve the hoisting stability. Four connecting ropes 42 distributed in a rectangular shape are jointly installed between the connecting frame 41 and the top inner wall of the hoisting frame 2. The hoisting frame 2 is composed of a horizontal section and two vertical Z-shaped sections symmetrically connected to the bottom of the horizontal section.

[0034] It should be noted that the horizontal section of the hoisting frame 2 is made of high-strength alloy steel Q460. After a special heat treatment process, its yield strength reaches more than 460MPa to ensure that it will not deform when subjected to huge hoisting loads. The thickness of the horizontal section of the hoisting frame 2 is 20mm and the width is 1500mm. Through precise mechanical processing, its flatness error is guaranteed to be within ±0.5mm. The two Z-shaped sections of the hoisting frame 2 are welded to the horizontal section. The welding process adopts automatic submerged arc welding. The weld quality meets the first-class standard to ensure the reliability of the connection.

[0035] The fixed shaft 5 is made of 40Cr alloy structural steel, and its surface is quenched and tempered to a hardness of HRC45-50, which improves wear resistance and fatigue resistance. The diameter of the fixed shaft 5 is 200mm, and the length is precisely designed to be 3000mm according to the internal dimensions of the hoisting frame 2. The fixed shaft 5 is connected to the front and rear inner walls of the hoisting frame 2 through high-precision tapered roller bearings, with a radial load capacity of 238kN and an axial load capacity of 110kN, ensuring that the fixed shaft 5 can rotate flexibly and stably support the triangular hoisting part 3 during the hoisting process.

[0036] During specific use, before the lifting operation, the arch tower closed section 1 is in a vertical position. The construction workers first use a wire rope to connect the lifting frame 2 to the crane. Then, the crane controls the lifting frame 2 to move to the top of the arch tower closed section 1, and then controls the lifting frame 2 to move downward, and ensures that the lifting frame 2 is erected on the outside of the arch tower closed section 1. Then, one end of the pulling rope 43 is passed through the inner wall of the arch tower closed section 1 and wrapped around it for a circle, and then the end of the pulling rope 43 is fixed to the connecting frame 41 to complete the preliminary fixation of the arch tower closed section 1, and at the same time facilitate the subsequent triangular lifting operation.

[0037] See also Figure 2 , Figure 4 and Figure 5, below the fixed shaft 5, there is a three-sided strengthening component 33 for internally supporting the inner side of the arch tower closing section 1 and a control component 34 for controlling the three-sided strengthening component 33. The three-sided strengthening component 33 cooperates with the three-point positioning component 31 to enhance the positioning strength of the arch tower closing section 1. Inside the hoisting frame 2, there is an adjusting component 35 for adjusting the three-sided strengthening component 33.

[0038] Refer to Figure 2 , Figure 3 , Figure 6 and Figure 7 , the adjusting component 35 includes side hydraulic cylinders 351 fixedly installed on the front and rear inner walls of the hoisting frame 2 through support plates. The side hydraulic cylinders 351 are all located below the fixed shaft 5. Both the side hydraulic cylinders 351 and the fixed shaft 5 are connected to the Z-shaped section of the hoisting frame 2. The three-sided strengthening component 33 includes an outer truss 331 fixedly installed at the output end of the side hydraulic cylinder 351. Inside the outer truss 331, a number of guiding pulley groups 332 evenly distributed along the length direction of the outer truss 331 are fixedly installed.

[0039] Refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7 , the number of guiding pulley groups 332 are evenly divided into several groups. Each group consists of four guiding pulleys distributed in a rectangular shape. Between the number of guiding pulley groups 332, two inner trusses 333 that are symmetric left and right are slidably installed together. On the left and right sides of the support plate, two limiting plates 352 are symmetrically and fixedly installed. On one side of the outer truss 331 close to the corresponding support plate, two limiting rods 353 that are symmetric left and right and slidably penetrate through the corresponding limiting plates 352 are fixedly installed.

[0040] During specific use, after the arch tower closing section 1 is initially fixed by the lifting rope 43, the side hydraulic cylinders 351 are started. The output end of the side hydraulic cylinder 351 pushes the outer truss 331 to move towards the arch tower closing section 1. Under the guiding and limiting effects of the limiting plates 352 and the limiting rods 353, the outer truss 331 finally stably moves to the inner side of the arch tower closing section 1, preparing for the subsequent internal support operation.

[0041] Refer to Figure 2 , Figure 4 , Figure 5 and Figure 6 , the driving component 32 includes an upper hydraulic cylinder 321 fixedly installed on the inner wall at the bending part of the Z-shaped section of the hoisting frame 2 and a driving frame 322 fixedly installed at the output end of the upper hydraulic cylinder 321. On the driving frame 322, two driving chutes 323 that are symmetric left and right are provided. On the side of the articulated rod 311 close to the driving frame 322, a driving slide rod 324 that is slidably matched with the corresponding driving chute 323 is fixedly installed.

[0042] Refer toFigure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , after the adjusting assembly 35 adjusts the horizontal position of the three-side strengthening assembly 33 and moves the three-side strengthening assembly 33 into the inner side of the arch tower closing section 1, the driving assembly 32 drives the three-point positioning assembly 31 to adjust to a state where it is aligned with the three lifting holes on the arch tower closing section 1. At the same time, the driving assembly 32 will synchronously drive the control assembly 34 to control the three-side strengthening assembly 33 to perform internal support on the inner side of the arch tower closing section 1, forming a triangular multi-level strengthening and positioning lifting structure.

[0043] During specific use, after the outer truss 331 moves to the inner side of the arch tower closing section 1, the upper hydraulic cylinder 321 is started. The output end of the upper hydraulic cylinder 321 drives the driving frame 322 to move upward in the vertical direction, thereby driving the driving chute 323 to move upward and squeeze the driving slide rod 324. Since the driving slide rod 324 can only slide within the driving chute 323, the movement of the driving frame 322 will cause the hinge rod 311 to rotate around the fixed shaft 5. During the rotation process, the left and right hinge rods 311 gradually open until the hinge rod 311 and the pin shaft holes 312 on the lifting frame 2 are aligned with the corresponding lifting holes on the arch tower closing section 1. At this time, the lifting fixing pin is passed through the pin shaft hole 312 and firmly inserted into the corresponding lifting hole of the arch tower closing section 1 to complete the three-point positioning, and then a stable connection structure is initially constructed between the arch tower closing section 1 and the lifting frame 2, providing positioning guarantee for subsequent lifting operations.

[0044] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 , the control assembly 34 includes a V-shaped frame 341 fixedly installed at the top of the inner truss 333 and a compression slide rod 342 fixedly installed on one side of the V-shaped frame 341 close to the corresponding side hydraulic cylinder 351. A follower plate 343 is fixedly installed on one side of the driving frame 322 close to the compression slide rod 342. Two extrusion chutes 344 that are symmetric left and right and slidably cooperate with the corresponding compression slide rods 342 are formed on the follower plate 343, and the extrusion chutes 344 are inclined.

[0045] During specific use, while performing three-point positioning, the movement of the driving frame 322 will synchronously drive the follower plate 343 to rise vertically. Since the extrusion chute 344 is inclined and the pressure-receiving slide bar 342 cannot move upward, during the sliding process of the pressure-receiving slide bar 342 along the extrusion chute 344, the pressure-receiving slide bar 342 will drive the inner truss 333 to move horizontally along the outer truss 331 through the V-shaped frame 341. The two inner trusses 333 on the left and right move towards each other. The inner truss 333 slides along the inner wall of the arch tower closing section 1 on the outer truss 331 through the guiding pulley group 332. When the pin holes 312 on the hinge rod 311 and the hoisting frame 2 are aligned with the corresponding hoisting holes on the arch tower closing section 1, the inner truss 333 abuts against the inner wall of the arch tower closing section 1, realizing uniform internal support for the inner side of the arch tower closing section 1. Thus, a stable three-dimensional triangular positioning and strengthening hoisting structure is formed.

[0046] Refer to Figures 1 to 7 , in which, the explanation of the three-dimensional triangular positioning and strengthening hoisting structure is as follows: Three points: Hoisting holes on the front and rear sides of the crown of the arch tower closing section 1: There is one hoisting hole on each of the front and rear sides of the crown of the arch tower closing section 1. These two hoisting holes are important components of the triangular positioning structure. During actual hoisting, the hinge rod 311 will be rotationally adjusted through the action of the driving assembly 32 to accurately align the pin holes 312 on the hoisting frame 2 with these two hoisting holes, and then insert hoisting fixing pins for fixation. These two hoisting holes bear part of the gravity of the upper part of the arch tower closing section 1 and the upward pulling force generated during hoisting, playing a key role in maintaining the stability of the arch tower closing section 1 in the vertical direction and effectively preventing the upper half of the arch tower closing section 1 from shaking and shifting during hoisting.

[0047] Hoisting holes at the two arc bottoms of the arch tower closing section 1: There is one hoisting hole on each of the front and rear sides of the arc bottom of the arch tower closing section 1. These hoisting holes are located at the lower part of the arch tower closing section 1 and cooperate with the hoisting holes on the front and rear sides of the crown. During hoisting, they are also connected to the hoisting holes at the lower part of the arch tower closing section 1 through the three-point positioning assembly 31. The hoisting holes at the lower part of the arch tower closing section 1 mainly bear the gravity of the lower part of the arch tower closing section 1 and the lateral force that may be generated during hoisting, and jointly act with the crown hoisting holes to ensure that the arch tower closing section 1 can maintain stability in both the horizontal and vertical directions and avoid tilting, torsion, etc.

[0048] Five faces: The face where the top arc lifting hole and the lifting hole on one of the bottom arcs are located: The top arc lifting hole, its corresponding lifting fixing pin, and one side hinge rod 311, and then to the corresponding bottom arc lifting hole and its corresponding lifting fixing pin form one face of the three-dimensional triangular positioning structure. This face plays a role in transmitting force mechanically, transmitting the force received at the top arc to the bottom arc, and balancing the force on one side of the closed section 1 of the arch tower. During the lifting process, when lateral forces such as wind force act, this face can disperse the lateral force to the top arc and bottom arc lifting holes, enhancing the anti-lateral displacement ability of the structure and ensuring the stability of the closed section 1 of the arch tower.

[0049] The face where the front and rear lifting holes on the top arc and the lifting hole on the other bottom arc are located: The top arc lifting hole, its corresponding lifting fixing pin, and the other side hinge rod 311, and then to the corresponding bottom arc lifting hole and its corresponding lifting fixing pin form one face of the three-dimensional triangular positioning structure. It acts together with the previous face to further stabilize the position of the closed section 1 of the arch tower in the horizontal direction. These two faces cooperate with each other like a stable framework, tightly connecting the upper and lower parts of the closed section 1 of the arch tower, effectively resisting the influence of various external forces on the horizontal position of the closed section 1 of the arch tower, and ensuring that the closed section 1 of the arch tower does not undergo horizontal displacement and rotation during the lifting process.

[0050] Two faces are formed by the two side hinge rods 311 and the corresponding drive frame 322 in the same three-point positioning component 31: Further stabilizing the above framework, and cooperating with the above two faces to basically form a three-dimensional triangular positioning and strengthening lifting structure.

[0051] The face formed by the three-side strengthening component 33: The inner truss 333 in the three-side strengthening component 33 provides internal support for the inner side of the closed section 1 of the arch tower, forming the bottom surface of the three-dimensional triangular positioning structure. This face plays a role in strengthening the overall stability in the triangular positioning structure. It and the previous several faces together form a closed three-dimensional triangular space structure. When the closed section 1 of the arch tower is subjected to external pressure or internal stress, this side can effectively share and transmit the force, enhancing the rigidity of the entire three-dimensional triangular positioning structure, preventing the closed section 1 of the arch tower from deforming during the lifting process, and ensuring the accuracy and safety of the lifting.

[0052] Refer to Figures 1 to 7 Moreover, the present invention also provides a method for using a multi-segment steel arch tower positioning and lifting device, which is completed by using the above-mentioned multi-segment steel arch tower positioning and lifting device, and includes the following steps: S1. Lifting preparation: Connect the lifting frame 2 to the crane with a steel wire rope, control the crane to move the lifting frame 2 directly above the closed section 1 of the arch tower and lower it, so that the lifting frame 2 is located outside the closed section 1 of the arch tower. Pass the lifting rope 43 through the inner wall of the closed section 1 of the arch tower and wind it around once and then fix it on the connecting frame 41 to complete the preliminary fixation.

[0053] S2. Triangular side reinforcement and positioning: Activate the side hydraulic cylinder 351 to push the outer truss 331 along the limit rod 353 towards the inside of the closed section 1 of the arch tower, providing a foundation for the internal support of the closed section 1 of the arch tower.

[0054] S3. Three-point positioning and internal support: Activate the upper hydraulic cylinder 321 to move the driving frame 322, and then rotate the articulated rod 311 around the fixed shaft 5 until the pin hole 312 aligns with the hoisting holes on the front and rear sides of the top and the bottom of the closed section 1 of the arch tower. Then insert the hoisting fixing pin to complete the three-point positioning. At the same time, the driving assembly 32 drives the control assembly 34 to move the inner truss 333 outwards until it closely fits the inner wall of the closed section 1 of the arch tower for internal support, and a three-dimensional triangular positioning and reinforcement hoisting structure is formed.

[0055] S4. Hoisting operation: Start the crane, and hoist the closed section 1 of the arch tower through the hoisting part 4 and the triangular hoisting part 3. During the hoisting process, utilize the stability of the three-dimensional triangular positioning and reinforcement hoisting structure to ensure the smooth rising of the closed section 1 of the arch tower for hoisting operations.

[0056] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A multi-segment steel arch tower positioning and hoisting device, comprising a hoisting frame for cooperating with a crane to perform hoisting and positioning operations on the closed section of the arch tower, characterized in that, A fixed shaft is fixedly installed between the front and rear inner walls of the hoisting frame. On the outer side of the fixed shaft, there are two symmetric triangular hoisting parts, including a three-point positioning component and a driving component for driving the three-point positioning component; A hoisting part is jointly arranged at the tops of the two triangular hoisting parts; The three-point positioning component includes two hinged rods that are hinged on the outer side of the fixed shaft and are arranged in a V shape. Pin holes that penetrate through the front and rear are provided on both the hinged rods and the hoisting frame. There is a hoisting hole on each of the front and rear sides of the top of the closed section of the arch tower, and there is a hoisting hole on each of the front and rear sides of the two arc bottoms of the closed section of the arch tower. After the three-point positioning component is adjusted to the state where the pin holes are aligned with the three hoisting holes on the closed section of the arch tower, a hoisting fixing pin is passed through the pin holes and fixedly inserted into the corresponding hoisting holes on the closed section of the arch tower for three-point positioning; The hoisting part includes a connecting frame fixedly installed between the two relatively front and rear hinged rods and a lifting rope fixedly installed on the inner wall of the connecting frame close to the hinged rod. Before hoisting, the lifting rope is sleeved on the closed section of the arch tower; Below the fixed shaft, there is a three-sided strengthening component for internally supporting the inner side of the closed section of the arch tower and a control component for controlling the three-sided strengthening component. The three-sided strengthening component and the three-point positioning component cooperate to form a three-dimensional triangular structure to strengthen the positioning strength of the closed section of the arch tower; An adjusting component for adjusting the horizontal position of the three-sided strengthening component is arranged inside the hoisting frame; after the adjusting component moves the three-sided strengthening component into the inner side of the closed section of the arch tower, the driving component drives the three-point positioning component to be adjusted to the state where the pin holes are aligned with the three hoisting holes on the closed section of the arch tower. At the same time, the driving component will synchronously control the three-sided strengthening component to internally support the closed section of the arch tower through the control component, forming a three-dimensional triangular multi-stage strengthening positioning hoisting structure.

2. The positioning and hoisting device for a multi-segment steel arch tower according to claim 1, wherein, The hoisting frame is composed of a horizontal section at the top and two vertically arranged Z-shaped sections symmetrically connected to the front and rear of the bottom of the horizontal section. The driving component includes an upper hydraulic cylinder fixedly installed on the inner wall of the bent part of the Z-shaped section of the hoisting frame and a driving frame fixedly installed at the output end of the upper hydraulic cylinder.

3. The positioning and hoisting device for a multi-segment steel arch tower according to claim 2, characterized in that, Two symmetric driving chutes are provided on the driving frame. A driving slide rod that is slidably matched with the corresponding driving chute is fixedly installed on one side of the hinged rod close to the driving frame.

4. A multi-segment steel arch tower positioning and hoisting device according to claim 2, characterized in that, The adjusting component includes side hydraulic cylinders fixedly installed on the front and rear inner walls of the hoisting frame through support plates. The side hydraulic cylinders are all located below the fixed shaft. The three-sided strengthening component includes an outer truss fixedly installed at the output end of the side hydraulic cylinder, and a number of guiding pulley groups are fixedly installed inside the outer truss and are evenly distributed along the length direction of the outer truss.

5. The positioning and hoisting device for a multi-segment steel arch tower according to claim 4, characterized in that The number of guiding pulley groups is divided into several groups, and each group is composed of four guiding pulleys distributed in a rectangular shape. Two symmetric inner trusses are slidably installed together between the number of guiding pulley groups. The driving component controls the left and right inner trusses to move away from each other through the control component to internally support the inner side of the closed section of the arch tower.

6. The positioning and hoisting device for a multi-segment steel arch tower according to claim 5, characterized in that, The control component includes a V-shaped frame fixedly installed on the top of the inner truss and a compression slide bar fixedly installed on the V-shaped frame near the side of the corresponding hydraulic cylinder. A follower plate is fixedly installed on the driving frame near the side of the compression slide bar. The follower plate is provided with two extrusion slide grooves that are symmetrical on the left and right and slideably cooperate with the corresponding compression slide bar, and the extrusion slide grooves are arranged at an angle.

7. A method for using a positioning and hoisting device for a multi-segment steel arch tower, characterized in that The method is completed by using a multi-segment steel arch tower positioning and hoisting device as described in any one of claims 1 to 6, including the following steps: S1. Preparation for hoisting: Connect the hoisting frame to the crane with a steel wire rope, operate the crane to move the hoisting frame to the top of the closed section of the arch tower and move it downward so that the hoisting frame is located outside the closed section of the arch tower. Pass the pulling rope through the inner wall of the closed section of the arch tower and fix it on the connecting frame after it is wrapped around once, thus completing the preliminary fixation; S2, three-side reinforcement in place: by adjusting the components, the three-side reinforcement components are moved into the inner side of the arch tower closed section to provide a foundation for the inner support of the arch tower closed section; S3, three-point positioning and internal support: the driving component drives the three-point positioning component to be adjusted to a state where it is aligned with the three lifting holes on the closed section of the arch tower, and then the lifting fixing pin is inserted to complete the three-point positioning. At the same time, the driving component controls the three-side reinforcement component to internally support the closed section of the arch tower through the control component; S4, lifting operation: The crane is started, and the closed section of the arch tower is lifted through the triangular lifting part and the lifting part. During the lifting process, the stability of the three-dimensional triangle multi-level positioning and lifting structure is strengthened to ensure that the closed section of the arch tower rises smoothly for lifting operations.

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