Arc-shaped pipe prefabrication installation construction method

Abstract

The application relates to a curved pipe prefabrication installation construction method, which comprises the following steps: deepening design, calculation of bending distance S, pipe bending, ground pre-assembly, support and hanger installation, pipe installation and pipe acceptance. In the application, the construction scheme improves the construction efficiency of curved pipe processing and installation and saves construction cost under the premise of meeting the cooperation of the curved pipe and the building shape; meanwhile, the curved pipe is formed by bending a plurality of curved pipe segments, so that the curved pipe has good smoothness and improves the appearance quality of the curved pipe.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to a method for the prefabrication and installation of curved pipes. Background Technology

[0002] In electromechanical piping, the routing of metal pipes needs to be compatible with the building structure. Curved metal pipes are designed to match the curved design of the building.

[0003] There are two traditional methods for installing curved metal pipes (also known as curved pipes) in buildings. The first method uses a "straight instead of curved" strategy, assembling the curved pipe into several straight pipes. However, this method results in pipes with insufficient smoothness, numerous joints and supports, affecting aesthetics and increasing the risk of leakage. The second method involves collaborating with specialized pipe manufacturers to customize pipes with specific curvature radii to suit the needs of curved buildings. However, this requires high precision in the building structure, is difficult to transport, has a long processing cycle, and is expensive. Therefore, the efficient fabrication and installation of high-precision curved metal pipes has become an important research topic. Summary of the Invention

[0004] To efficiently and cost-effectively manufacture and install curved metal pipes, this application provides a prefabrication and installation method for curved pipes.

[0005] This application provides a prefabrication and installation method for curved pipes, which adopts the following technical solution:

[0006] A method for prefabricating and installing curved pipes includes the following steps:

[0007] Detailed design: Based on the architectural model or architectural design drawings, obtain the curvature and arc length parameters of the curved area of ​​the building structure; use BIM technology to draw detailed drawings of the curved pipe that match the curved area of ​​the building, so that the curvature and arc length of the designed curved pipe are consistent with the curvature and arc length of the building structure;

[0008] Bending distance S calculation: In the BIM model, grab the pipe, divide the arc pipe that matches the building structure into several small arc pipe segments, and calculate the bending distance S of the arc pipe.

[0009] Pipe bending: A bending machine is used to bend the pipe. The bending machine is equipped with a pushing device and a limiting device. The limiting device is located on both sides of the pushing device. After the pipe is tightly fitted with the two limiting devices, the pushing device processes the pipe into an arc shape according to the designed bending distance S. When the final bending distance is reached, the pushing device stops pushing to process the pipe into an arc shape. Ground pre-assembly: The processed arc-shaped pipe is transported to the installation position, and pre-assembly is carried out on the ground according to the arrangement of the arc-shaped pipe in the detailed drawing.

[0010] Support and hanger installation: Extract the layout points of the hangers and structural columns based on the optimized BIM model, and then import the BIM model and data into the controller of the layout robot. The layout robot accurately measures and lays out the fixed points of the hangers and marks the fixed points.

[0011] Pipeline installation: Complete the construction of the hanging brackets according to the fixing points of the hanging brackets. Use hoists to hoist the prefabricated arc pipes and cable trays onto the hanging brackets in sequence. After confirming that the installation position is correct, use pipe connectors to tightly connect the pipe ends of adjacent arc pipes and arc pipes and straight pipes, thereby assembling the arc pipes and straight pipes into building pipelines.

[0012] Pipeline acceptance: After the pipeline is installed, a comprehensive scan of the pipeline is performed, and the scan data is entered into the robot system for comparison and verification with the detailed drawing of the curved pipe.

[0013] By adopting the above technical solution, this solution uses BIM detailed design and computer-aided calculation software to determine the curvature and length information of the curved pipes that match the curved shape of the building. A three-point bending process is used to process straight pipes into curved pipes. The bending machine starts from one end of the pipe and bends each curved pipe sequentially to the other end, thus bending the pipe into a curved shape. The high-precision segmented bending of the curved pipes ensures they match the curved appearance of the building. In other words, this construction solution improves the efficiency of curved pipe processing and installation while saving construction costs, provided that the curved pipes match the building's shape. Furthermore, the segmented bending of several curved pipes gives the curved pipes good smoothness and improves their appearance quality.

[0014] The layout and positioning function of the layout robot is used to ensure the accuracy of pipeline installation, improve the aesthetics of the curved pipe, and shorten the construction period.

[0015] Optionally, in the calculation of the bending distance S, Where R is the radius of the arc, r is the radius of the pipe, S is the sag, and A is the center distance of the limiting device; the sag, i.e. the theoretical value of the bending distance of the arc pipe, is accurately calculated.

[0016] By adopting the above technical solution and using the above calculation formula to drive the bending distance of each arc-shaped pipe, it is easier for workers to bend the arc-shaped pipe, while improving the smoothness of the arc-shaped pipe's appearance and enhancing the building's aesthetics.

[0017] Optionally, the center distance A between the two limiting devices is 1792mm.

[0018] By adopting the above technical solution, when the center distance between the two limiting devices on the bending machine is 1792mm, the bending machine has a better bending effect on the arc-shaped pipe.

[0019] Optionally, the pipe installation process may also include the following steps:

[0020] Determine the lower bend point of the arc-shaped pipe, which serves as the first lifting point of the arc-shaped pipe. At least one second lifting point is provided on each side of the first lifting point of the arc-shaped pipe. The arc-shaped pipe is equipped with a lifting clamp, and a rubber gasket is provided between the lifting clamp and the arc-shaped pipe. The lifting clamp is equipped with a first lifting ring. The lifting clamp is set at the first and second lifting points of the arc-shaped pipe. The first lifting ring is used for the hoist to hang.

[0021] By adopting the above technical solution, and by setting lifting points at the lower bend of the arc-shaped pipe, and also setting lifting points on both sides of the lower bend, the arc-shaped pipe can be kept horizontal during the lifting process, which facilitates the lifting and subsequent installation of the arc-shaped pipe.

[0022] Optionally, the pipe installation process may also include the following steps:

[0023] Anti-tilt components are installed at both ends of the arc-shaped tube. The anti-tilt components include a plug block, an airbag, a second lifting ring, a third lifting ring, an upper fixed pulley, a lower fixed pulley, and a steel strand. The plug block is stepped and includes a first component and a second component. The first component is located on the outside of the arc-shaped tube, and the second component is inserted into the arc-shaped tube. The airbag is located on the outer periphery of the second component and is used to fix it to the inner wall of the arc-shaped tube. The second and third lifting rings are fixed on the first component. The upper fixed pulley is fixed on the ceiling and is located between the two ends of the arc-shaped tube. The lower fixed pulley is fixed on the building floor. One end of the steel strand is fixedly connected to the second lifting ring, and the other end of the steel strand is successively wound around the upper and lower fixed pulleys. The steel strand is then fixedly connected to the third lifting ring at the other end of the arc-shaped tube.

[0024] When the building has a high floor height, the hoist may tilt or fall during the hoisting of curved pipes due to the difference in lifting height, thus affecting the safety of the hoisting.

[0025] By adopting the above technical solution, when the arc-shaped pipe tilts, the limiting effect of the steel strand on both ends of the arc-shaped pipe keeps both ends of the arc-shaped pipe on the same horizontal plane; thus, during the hoisting process of the arc-shaped pipe, the risk of the arc-shaped pipe tilting and falling can be reduced, and the safety of construction can be improved.

[0026] Optionally, the steel strand is connected to the second lifting ring via a double-hook tensioner.

[0027] By adopting the above technical solution, the tension of the steel strand is increased through the adjustment function of the double hook tensioner, thereby improving the sensitivity of the steel strand to the angle adjustment of the arc tube.

[0028] Optionally, during the pipe installation process, guy ropes are tied to both ends of the curved pipe.

[0029] By adopting the above technical solution, and by tying guy ropes to both ends of the arc-shaped pipe, the degree of swaying of the arc-shaped pipe can be reduced during the hoisting process.

[0030] Optionally, during the pipe bending process, a QR code "ID card" is affixed to each of the processed curved pipes to display information such as the floor where the curved pipe is installed, the system number, the radius of the arc, and the arc length.

[0031] By adopting the above technical solution, QR codes are affixed to the curved pipes to facilitate the installation of the pipes by staff, thereby improving the accuracy of the installation.

[0032] Optionally, after completing the pipe installation steps, the following steps are also included:

[0033] Pipeline pressure test: A pressure test is conducted on the assembled building pipelines. Water is injected into the building pipelines and pressurized to the design pressure. Then, the pipelines are pressure-held. After the pressure holding time is reached, the building pipelines are checked for leaks.

[0034] By adopting the above technical solution, pressure tests are conducted on the pipe diameter to observe whether there are any damaged points in the arc-shaped pipe, thereby reducing subsequent maintenance costs.

[0035] Optionally, a laser rangefinder is also provided on the workbench of the pipe bending machine, which is used to monitor the bending distance of the pipe.

[0036] By adopting the above technical solution and installing a laser rangefinder on the bending machine, it is easier for workers to accurately bend arc-shaped pipes.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. This construction plan improves the efficiency of arc tube processing and installation and saves construction costs while ensuring that the arc tube matches the building's shape. At the same time, the arc tube is formed by bending several arc tubes in sections, which gives the arc tube good smoothness and improves its appearance quality.

[0039] 2. By using the above calculation formula to drive the bending distance of each arc-shaped pipe, it is easier for workers to bend the arc-shaped pipe, while improving the smoothness of the arc-shaped pipe's appearance and enhancing the building's aesthetics.

[0040] 3. When the arc-shaped pipe tilts, the steel strands limit the movement of both ends of the pipe, keeping them on a horizontal plane. This reduces the risk of the pipe tilting or falling during hoisting, thus improving construction safety. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating the construction method in Example 1.

[0042] Figure 2 This is a schematic diagram illustrating the structure of the bending machine in Example 1.

[0043] Figure 3 This is a schematic diagram illustrating the principle of bending the arc-shaped tube in Example 1.

[0044] Figure 4 This is a schematic diagram illustrating the arc-shaped pipe hoisting method in Example 2.

[0045] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0046] Figure 6 This is a schematic diagram illustrating the anti-tilt component structure in Embodiment 2.

[0047] Explanation of reference numerals in the attached drawings: 1. Bending machine; 11. Control device; 12. Propulsion device; 13. Limiting device; 14. Laser rangefinder; 2. Arc-shaped tube; 21. First end; 22. Second end; 31. Connecting block; 311. First component; 312. Second component; 32. Airbag; 33. Second lifting ring; 34. Third lifting ring; 35. Upper fixed pulley; 36. Lower fixed pulley; 37. Steel strand; 38. Double hook tensioner; 4. Lifting clamp; 5. Rubber washer; 6. First lifting ring; 7. First lifting point; 8. Second lifting point; 10. Guy rope; 17. Ceiling; 18. Building floor slab. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0049] This application discloses a method for prefabricating and installing curved pipes. This construction method is applicable to the construction of curved metal pipes with diameters of DN50-DN350, and is especially suitable for the high-precision on-site fabrication and installation of curved metal pipes in complex building environments.

[0050] Reference Figure 1 The prefabrication and installation method for curved pipes includes the following steps:

[0051] Detailed design: Based on the architectural model or architectural design drawings, obtain the curvature and arc length parameters of the curved area of ​​the building structure; use BIM technology to draw a detailed drawing of the curved pipe 2 that matches the curved area of ​​the building, so that the curvature and arc length of the designed curved pipe 2 are consistent with the curvature and arc length of the building structure.

[0052] Bending distance S calculation: In the BIM model, grab the pipe, divide the arc pipe 2 that matches the building structure into several small arc pipes 2, and calculate the bending distance S of the arc pipe 2.

[0053] Reference Figure 1 and Figure 2 Pipe bending: A pipe bending machine 1 is used to bend the pipe. The bending machine 1 is equipped with a control device 11, a feeding device 12, a limiting device 13, and a laser rangefinder 14. The limiting devices 13 are located on both sides of the feeding device 12, and the pipe is in close contact with the two limiting devices 13. The control device 11 controls the feed distance of the feeding device 12 according to the calculated bending distance. The feeding device 12 processes the pipe into an arc shape according to the designed bending distance S. When the final bending distance is reached, the pushing of the feeding device 12 stops, so as to process the pipe into an arc-shaped pipe 2. In this embodiment, the laser rangefinder 14 is set on the worktable of the bending machine 1. The laser rangefinder 14 is used to monitor the bending distance of the pipe, thereby facilitating the operator to accurately bend the arc-shaped pipe 2.

[0054] Reference Figure 2 and Figure 3 In the calculation of the bending distance S, In this equation, R is the radius of the arc, r is the radius of the pipe, S is the sag, and A is the center distance of the limiting devices 13. The sag, i.e., the theoretical value of the bending distance of the arc-shaped pipe 2, is precisely calculated. By using the above calculation formula to drive the bending distance of each arc-shaped pipe 2, it is easier for workers to bend the arc-shaped pipe 2, making the curvature of the arc-shaped pipe 2 match the curved appearance of the building. At the same time, obtaining the bending distance of the arc-shaped pipe 2 through the above calculation formula can improve the smoothness of the appearance of the arc-shaped pipe 2 and enhance the aesthetics of the building. In this embodiment, the value of the center distance A between the two limiting devices 13 is 1792mm. When the center distance between the two limiting devices 13 on the bending machine 1 is 1792mm, the bending machine 1 has a better bending effect on the arc-shaped pipe 2, ensuring the bending effect of the arc-shaped pipe 2 while reducing structural damage to the arc-shaped pipe 2. Both sides of the arc-shaped section of the arc-shaped pipe 2 retain a certain length of straight ends to facilitate the connection of the arc-shaped pipe 2 with other pipes.

[0055] Reference Figure 1 Each completed arc-shaped pipe 2 is affixed with a QR code "ID card" to display information such as the floor where it is installed, system number, arc radius, and arc length; this facilitates the installation of the arc-shaped pipe 2 by staff and improves the accuracy of the installation.

[0056] Ground pre-assembly: Transport the processed arc-shaped pipe 2 to the installation position, and perform pre-assembly on the ground according to the layout of the arc-shaped pipe in the detailed drawing.

[0057] Pipe support installation: Based on the optimized BIM model, the layout points of the supports and structural columns are extracted. Then, the BIM model and data are imported into the controller of the layout robot, which accurately measures and marks the fixing points of the supports. The layout robot's layout and positioning function is used to ensure the accuracy of pipe installation, improve the aesthetics of the curved pipe 2, and shorten the construction period.

[0058] Pipeline installation: Complete the construction of the hanging brackets according to the fixing points of the hanging brackets. Use a hoist to hoist the prefabricated arc-shaped pipe 2 and the cable tray onto the hanging brackets in sequence. After confirming that the installation position is correct, use pipe connectors to tightly connect the adjacent arc-shaped pipe 2 and the pipe ends of the arc-shaped pipe 2 and the straight pipe, thereby assembling the arc-shaped pipe 2 and the straight pipe into a building pipeline.

[0059] Pipeline pressure test: A pressure test is conducted on the assembled building pipelines. Water is injected into the pipelines and pressurized to the design pressure, followed by a pressure holding process. After the pressure holding time is reached, the pipelines are checked for leaks. By conducting pressure tests on the pipe diameter, it is ensured that the curved pipe 2 has no damage points, reducing subsequent maintenance.

[0060] Pipeline acceptance: After the pipeline is installed, a full scan of the pipeline is performed, and the scan data is entered into the robot system for comparison and verification with the detailed drawing of the arc pipe 2.

[0061] The implementation principle of the prefabrication and installation method for arc-shaped pipes in this application embodiment is as follows:

[0062] This technical solution uses BIM detailed design and computer-aided calculation software to determine the curvature and length information of the curved pipe 2 that matches the building's curved shape. A three-point bending process is employed to process the straight pipe into curved pipe 2. The bending machine 1 bends each curved pipe 2 sequentially from one end of the pipe to the other, thus bending the pipe into a curved pipe 2. The high-precision, segmented bending of the curved pipe 2 ensures it matches the building's curved appearance. In short, this construction solution improves the efficiency of processing and installing the curved pipe 2 while saving construction costs, provided that the curved pipe 2 matches the building's shape. Furthermore, the segmented bending of several curved pipes 2 results in a smooth, rounded shape, improving the appearance quality of the curved pipe 2.

[0063] Example 2

[0064] The difference between Example 2 and Example 1 is as follows:

[0065] During the hoisting process, the lower bend of the curved pipe 2 is prone to sagging, which affects the hoisting of the curved pipe 2. Moreover, when the building has a high floor height, the hoisting hoist may tilt or fall significantly during the hoisting process, due to the difference in lifting height, thus affecting the safety of the hoisting of the curved pipe 2.

[0066] Therefore, in this embodiment, the pipe installation step further includes the following steps:

[0067] Reference Figure 4 and Figure 5 The most unfavorable lifting point is determined as follows: The lower bend point of the arc-shaped pipe 2 is designated as the first lifting point 7, and at least one second lifting point 8 is provided on each side of the first lifting point 7. A lifting clamp 4 is installed on the arc-shaped pipe 2, with a rubber gasket 5 between the clamp 4 and the pipe. A first lifting ring 6 is provided on the clamp 4. The clamp 4 is positioned at the first lifting point 7 and the second lifting point 8 of the arc-shaped pipe 2. The first lifting ring 6 is used for attaching to the hoist. By setting a lifting point at the lower bend point of the arc-shaped pipe 2, and also setting lifting points on both sides of the lower bend point, the arc-shaped pipe 2 can remain horizontal during lifting, thus facilitating its lifting and subsequent installation.

[0068] Reference Figure 4 and Figure 5 Anti-tilt components are installed at both ends of the arc-shaped tube 2; the anti-tilt components include a plug block 31, an airbag 32, a second lifting ring 33, a third lifting ring 34, an upper fixed pulley 35, a lower fixed pulley 36, and a steel strand 37. (Refer to...) Figure 4 and Figure 6 The insertion block 31 is stepped and includes a first component 311 and a second component 312. The first component 311 is located on the outside of the arc-shaped tube 2, and the second component 312 is inserted into the arc-shaped tube 2. An airbag 32 is located on the outer periphery of the second component 312. After the second component 312 and the airbag 32 are inserted into the arc-shaped tube 2, air is inflated into the airbag 32, so that the airbag 32 is fixed to the inner peripheral wall of the arc-shaped tube 2. The second lifting ring 33 and the third lifting ring 34 are fixed on the first component 311, and the upper fixed pulley 35 is fixed on the ceiling 17 and is located between the two ends of the arc-shaped tube 2. The lower fixed pulley 36 is fixed on the building floor slab 18. One end of the steel strand 37 is fixedly connected to the second lifting ring 33. The other end of the steel strand 37 is wound around the upper fixed pulley 35 and the lower fixed pulley 36 in sequence. The steel strand 37 is then fixedly connected to the third lifting ring 34 at the other end of the arc-shaped tube 2.

[0069] Reference Figure 4In this embodiment, the steel strand 37 is connected to the second lifting ring 33 via a double-hook tensioner 38. The tension of the steel strand 37 is increased through the adjustment action of the double-hook tensioner 38, thereby improving the sensitivity of the steel strand 37 to the angle adjustment of the arc-shaped pipe 2. In the tilting assembly, the steel strand 37 retains a certain degree of freedom to reduce friction between the steel strand 37 and the upper fixed pulley 35 and lower fixed pulley 36, facilitating the hoisting of the arc-shaped pipe 2.

[0070] Reference Figure 4 Install guy ropes 10: Tie guy ropes 10 to both ends of the arc-shaped pipe 2; thereby reducing the swaying of the arc-shaped pipe 2 during the hoisting process, making it easier for workers to hoist the arc-shaped pipe 2.

[0071] The implementation principle of the prefabrication and installation method for arc-shaped pipes in this application embodiment is as follows:

[0072] Reference Figures 4 to 6 For ease of description, the two ends of the arc-shaped pipe 2 are defined as the first end 21 and the second end 22, respectively. By installing anti-tilting components at both ends of the arc-shaped pipe 2, when the arc-shaped pipe 2 tilts, for example, when the first end 21 of the arc-shaped pipe 2 is lower than the second end 22, the first end 21 of the arc-shaped pipe 2 will pull the steel strand 37, thereby applying a downward force to the second end 22 of the arc-shaped pipe 2 through the steel strand 37. Similarly, the steel strand 37 will also apply an upward force to the first end 21 of the arc-shaped pipe 2. That is, through the limiting effect of the steel strand 37 on both ends of the arc-shaped pipe 2, both ends of the arc-shaped pipe 2 are kept on a horizontal plane; thus, during the hoisting process of lifting the arc-shaped pipe 2, the risk of tilting and falling of the arc-shaped pipe 2 can be reduced, and the safety of construction can be improved.

[0073] 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 method for prefabricating and installing arc-shaped pipes, characterized in that: Includes the following steps: Detailed design: Based on the building model or architectural design drawings, obtain the curvature and arc length parameters of the curved area of ​​the building structure; use BIM technology to draw a detailed drawing of the curved pipe (2) that matches the curved area of ​​the building, so that the curvature and arc length of the designed curved pipe (2) are consistent with the curvature and arc length of the building structure; Calculation of bending distance S: In the BIM model, grab the pipe and divide the arc pipe (2) that matches the building structure into several small arc pipes (2), and calculate the bending distance S of the arc pipe (2); Pipe bending: The pipe is bent using a bending machine (1). The bending machine (1) is equipped with a pushing device (12) and a limiting device (13). The limiting device (13) is set on both sides of the pushing device (12). After the pipe is tightly fitted with the two limiting devices (13), the pushing device (12) performs arc processing on the pipe according to the designed bending distance S. When the final bending distance is reached, the pushing device (12) stops pushing to process the pipe into an arc pipe (2). Ground pre-assembly: The processed arc-shaped pipe (2) is transported to the installation position, and pre-assembly is carried out on the ground according to the arrangement of the arc-shaped pipe (2) in the detailed drawing; Support and hanger installation: Extract the layout points of the hangers and structural columns based on the optimized BIM model, and then import the BIM model and data into the controller of the layout robot. The layout robot accurately measures and lays out the fixed points of the hangers and marks the fixed points. Pipeline installation: Complete the construction of the hanging bracket according to the fixed point of the hanging bracket. Use the hoist to hoist the prefabricated arc pipe (2) and the wire trough onto the hanging bracket in sequence. After confirming that the installation position is correct, use the pipe connector to tightly connect the adjacent arc pipe (2) and the pipe head of the arc pipe (2) and the straight pipe, so as to assemble the arc pipe (2) and the straight pipe into a building pipeline. Pipeline acceptance: After the pipeline is installed, the pipeline is fully scanned and the scan data is entered into the robot system for comparison and verification with the detailed drawing of the arc pipe (2); The pipeline installation process also includes the following steps: determining the lower bend point of the arc pipe (2), the lower bend point of the arc pipe (2) is used as the first lifting point (7) of the arc pipe (2), and at least one second lifting point (8) is provided on each side of the first lifting point (7) of the arc pipe (2); the arc pipe (2) is equipped with a lifting clamp (4), and a rubber gasket (5) is provided between the lifting clamp (4) and the arc pipe (2), and a first lifting ring (6) is provided on the lifting clamp (4), the lifting clamp (4) is set at the first lifting point (7) and the second lifting point (8) of the arc pipe (2), and the first lifting ring (6) is used for the hoist to hang; In the pipe installation process, also The process includes the following steps: Installing anti-tilt components: Anti-tilt components are installed at both ends of the arc-shaped tube (2); the anti-tilt components include a plug block (31), an airbag (32), a second lifting ring (33), a third lifting ring (34), an upper fixed pulley (35), a lower fixed pulley (36), and a steel strand (37); the plug block (31) is stepped, and includes a first component (311) and a second component (312). The first component (311) is located on the outside of the arc-shaped tube (2), and the second component (312) is inserted into the arc-shaped tube (2). The airbag (32) is located on the outer periphery of the second component (312). The bladder (32) is used to fix the inner circumferential wall of the arc tube (2); the second lifting ring (33) and the third lifting ring (34) are fixed on the first component (311); the upper fixed pulley (35) is fixed on the ceiling (17) and is located between the two ends of the arc tube (2); the lower fixed pulley (36) is fixed on the building floor slab (18); one end of the steel strand (37) is fixedly connected to the second lifting ring (33); the other end of the steel strand (37) is wound around the upper fixed pulley (35) and the lower fixed pulley (36) in sequence; and the steel strand (37) is fixedly connected to the third lifting ring (34) at the other end of the arc tube (2).

2. The prefabrication and installation method for arc-shaped pipes according to claim 1, characterized in that: The steel strand (37) is connected to the second lifting ring (33) via a double hook tensioner (38).

3. The prefabrication and installation method for arc-shaped pipes according to claim 1, characterized in that: During the pipe installation process, guy ropes (10) are tied to both ends of the arc-shaped pipe (2).

4. The prefabrication and installation method for arc-shaped pipes according to claim 1, characterized in that: During the pipe bending process, a QR code "ID card" is affixed to each of the processed arc-shaped pipes (2) to display the installation floor, system number, arc radius, and arc length information of the arc-shaped pipe (2).

5. The prefabrication and installation method for arc-shaped pipes according to claim 1, characterized in that: After completing the pipe installation steps, Includes the following steps: Pipeline pressure test: A pressure test is conducted on the assembled building pipelines. Water is injected into the building pipelines and pressurized to the design pressure. Then, the pipelines are pressure-held. After the pressure holding time is reached, the building pipelines are checked for leaks.

6. The prefabrication and installation method for arc-shaped pipes according to claim 1, characterized in that: A laser rangefinder (14) is also provided on the workbench of the bending machine (1), which is used to monitor the bending distance of the pipeline.

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