Prefabricated installation construction method for arc-shaped pipe

Abstract

The invention relates to a construction method for prefabricating and installing an arc-shaped pipe. The construction method comprises the following steps of deepening design, simmering and bending distance S calculation, pipeline simmering and bending, ground pre-assembly, support and hanger installation, pipeline installation and pipeline acceptance. According to the construction scheme, on the premise that the arc-shaped pipe is matched with the shape of a building, the construction efficiency of machining and mounting of the arc-shaped pipe is improved, and the construction cost is saved; meanwhile, the arc-shaped pipe is formed by bending a plurality of arc-shaped pipe sections, so that the arc-shaped pipe has good roundness, and the appearance quality of the arc-shaped pipe is improved.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a method for prefabricating and installing an arc-shaped pipe. Background Art

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

[0003] There are two traditional production methods for installing curved metal pipes (also called curved tubes) in buildings. The first method is to adopt the strategy of "replacing curves with straight lines" and divide the curved pipes into several straight pipes for assembly; however, the curved pipes produced by this method are not smooth enough, and have many joints and supports, which affects the aesthetics and increases the risk of water leakage. The second method is to cooperate with professional pipe manufacturers to customize pipes with specific curvature radii to meet the needs of curved buildings, but this requires high precision of the building structure, is difficult to transport, has a long processing cycle and is expensive. Therefore, the efficient production and installation of high-precision curved metal pipes has become an important research topic. Summary of the invention

[0004] In order to manufacture and install arc-shaped metal pipes efficiently and at low cost, the present application provides an arc-shaped pipe prefabrication and installation construction method.

[0005] The present application provides a method for prefabricating and installing an arc-shaped pipe, which adopts the following technical solution: A method for prefabricating and installing an arc tube comprises the following steps: Deepening design: According to the building model or building design drawings, the curvature and arc length parameters of the curved area of ​​the building structure are obtained; the curved pipe deepening drawing matching the curved area of ​​the building is drawn using BIM technology, so that the curvature and arc length of the designed curved pipe are consistent with the curvature and arc length of the building structure; Calculation of bending distance S: grab the pipe in the BIM model, divide the arc pipe that matches the building structure into several small arc pipes, and calculate the bending distance S of the arc pipe; Pipeline bending: The pipe is bent using a bending machine. The bending machine is provided with a push device and a limit device. The limit devices are arranged on both sides of the push device. After the pipe is tightly fitted with the two limit devices, the push device performs arc processing on the pipe according to the designed bending distance S. When the final bending distance is reached, the push of the push device is stopped to process the pipe into an arc pipe. Ground pre-assembly: transport the processed arc tube to the installation location, and carry out pre-assembly on the ground according to the layout of the secondary tube in the detailed drawing; Installation of supports and hangers: Extract the layout points of hangers, structural columns, etc. according to the optimized BIM model, and then import the BIM model and data into the controller of the layout robot. The layout robot will accurately measure and mark the fixed points of the hangers; Pipeline installation: Complete the construction of the hanging bracket according to the fixing point of the hanging bracket, use the hoisting hoist to hoist the prefabricated arc pipe and cable trough onto the hanging bracket in turn, and after confirming that the installation position is correct, use the pipe connector to tightly connect the adjacent arc pipes and the pipe heads of the arc pipe and the straight pipe, so as to assemble the arc pipe 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 arc pipe deepening drawing.

[0006] By adopting the above technical scheme, this technical scheme determines the curvature, arc length and other information of the arc tube that matches the arc shape of the building through BIM in-depth design, computer-aided calculation software, etc.; the three-point bending process is used to process the straight tube into an arc tube, and the bending machine bends each arc tube from one section of the pipe to the other end of the pipe in sequence, thereby bending the pipe into an arc tube, and the arc tube bent in sections with high precision is compatible with the arc appearance of the building. That is, this construction scheme improves the construction efficiency of arc tube processing and installation and saves construction costs on the premise of meeting the matching of the arc tube with the building appearance; at the same time, the arc tube is formed by bending several arc tubes in sections, so that the arc tube has good smoothness and improves the appearance quality of the arc tube.

[0007] The layout and positioning function of the layout robot is used to ensure the accuracy of pipeline installation, improve the aesthetics of the arc pipe, and shorten the construction period.

[0008] Optionally, in the calculation of the bending distance S, Where R is the arc radius, r is the pipe radius, S is the sagitta, and A is the center distance of the limit device; the sagitta, that is, the theoretical value of the arc pipe bending distance, is accurately calculated.

[0009] By adopting the above technical solution and the above calculation formula to drive the bending distance of each arc tube, it is convenient for workers to bend the arc tube, while improving the smoothness of the arc tube appearance and the aesthetics of the building.

[0010] Optionally, the value of the center distance A between the two limit devices is 1792 mm.

[0011] By adopting the above technical solution, when the center distance between the two limit devices on the bending machine is 1792mm, the bending machine has a better bending effect on the arc tube.

[0012] Optionally, the pipeline installation step further includes the following steps: Determine the most unfavorable lifting point: determine the lower bending point of the arc tube, the lower bending point of the arc tube is used as the first lifting point of the arc tube, and at least one second lifting point is provided on each side of the first lifting point of the arc tube; a lifting hoop is provided on the arc pipe, and a rubber gasket is provided between the lifting hoop and the arc tube, a first lifting ring is provided on the lifting hoop, the first and second lifting points of the arc tube are provided on the lifting hoist, and the first lifting ring is used for hanging the lifting hoist.

[0013] By adopting the above technical solution, a hanging point is set at the lower bending point of the arc tube, and hanging points are also set on both sides of the lower bending point; the arc tube can remain in a horizontal state during the lifting process, thereby facilitating the lifting and subsequent installation of the arc tube.

[0014] Optionally, the pipeline installation step further includes the following steps: Install the anti-tilt assembly: anti-tilt assemblies are installed at both ends of the arc tube; the anti-tilt assembly includes a plug-in 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-in block is step-shaped, and includes a first component and a second component, the first component is arranged on the outside of the arc tube, the second component is inserted into the arc tube, the airbag is arranged on the outer periphery of the second component, and the airbag is used to be fixed to the inner circumferential wall of the arc tube; the second lifting ring and the third lifting ring are fixed on the first component, the upper fixed pulley is fixed on the ceiling, and the upper fixed pulley is located between the two ends of the arc 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 looped around the upper fixed pulley and the lower fixed pulley, and then the steel strand is fixedly connected to the third lifting ring at the other end of the arc tube.

[0015] When the building has a high floor height, during the process of hoisting the arc pipe, the arc pipe has a large tilt and falls due to the height difference of the hoisting hoist, which affects the safety of the arc pipe hoisting.

[0016] By adopting the above technical solution, when the arc pipe is tilted, the limiting effect of the steel strand on the two ends of the arc pipe keeps the two ends of the arc pipe on the same horizontal plane; thus, when the arc pipe is hoisted by the hoisting hoist, the risk of tilting and falling of the arc pipe can be reduced, thereby improving the safety of construction.

[0017] Optionally, the steel strand is connected to the second lifting ring via a double-hook tensioner.

[0018] By adopting the above technical solution, the tension of the steel strand is improved through the adjustment effect of the double-hook tensioner, thereby improving the sensitivity of the steel strand to the adjustment of the arc tube angle.

[0019] Optionally, during the pipeline installation step, guy ropes are tied at both ends of the arc-shaped pipe.

[0020] By adopting the above technical solution, by tying cables and wind ropes at both ends of the arc tube, the shaking degree of the arc tube can be reduced during the arc tube hoisting process.

[0021] Optionally, in the pipe bending step, a QR code "ID card" is affixed to each of the processed arc pipes to display information such as the arc pipe installation floor, system number, arc radius, arc length, etc.

[0022] By adopting the above technical solution, a QR code is posted on the arc tube to facilitate workers to install the arc tube, thereby improving the accuracy of arc tube installation.

[0023] Optionally, after completing the pipeline installation step, the following steps are also included: Pipeline pressure test: Conduct a pressure test on the assembled building pipelines. Fill the pipelines with water and pressurize them to the design pressure. Then, the pipelines are subjected to pressure maintenance treatment. After the pressure maintenance time is reached, check whether there are any leaks in the pipelines.

[0024] By adopting the above technical solution, a pressure test is performed on the pipe diameter to observe whether the arc pipe has any damaged points, so as to reduce the subsequent maintenance costs.

[0025] Optionally, a laser distance meter is also provided on the workbench of the bending machine, and the laser distance meter is used to monitor the bending distance of the pipeline.

[0026] By adopting the above technical solution and arranging a laser rangefinder on the bending machine, it is convenient for workers to accurately bend the arc tube.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. This construction scheme improves the construction efficiency of arc-shaped pipe processing and installation and saves construction costs on the premise of meeting the requirements of matching the arc-shaped pipe with the building appearance; at the same time, the arc-shaped pipe is formed by bending several arc-shaped pipes in sections, which makes the arc-shaped pipe have good roundness and improves the appearance quality of the arc-shaped pipe; 2. By using the above calculation formula to drive the bending distance of each arc tube, it is convenient for the staff to bend the arc tube, and at the same time, the roundness of the arc tube appearance is improved, and the aesthetics of the building is improved; 3. When the arc pipe is tilted, the steel strands limit the ends of the arc pipe, so that the two ends of the arc pipe remain on the same horizontal plane; thus, when the arc pipe is hoisted by the hoisting hoist, the risk of tilting and falling of the arc pipe can be reduced, thereby improving the safety of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart showing the construction method in Example 1.

[0029] Figure 2It is a schematic diagram of the bending machine structure in Example 1.

[0030] Figure 3 It is a schematic diagram embodying the arc tube bending principle in Example 1.

[0031] Figure 4 It is a schematic diagram of the arc pipe lifting method in Example 2.

[0032] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0033] Figure 6 It is a schematic diagram of the anti-tilt component structure in Example 2.

[0034] Explanation of the accompanying drawings: 1. bending machine; 11. control device; 12. propulsion device; 13. limit device; 14. laser rangefinder; 2. arc tube; 21. first end; 22. second end; 31. plug-in 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 hoop; 5. rubber gasket; 6. first lifting ring; 7. first lifting point; 8. second lifting point; 10. guy rope; 17. ceiling; 18. building floor. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The embodiment of the present application discloses a method for prefabrication and installation of arc-shaped pipes. The construction scheme is suitable for the construction of arc-shaped metal pipes with a diameter of DN50-DN350, and is particularly suitable for on-site high-precision production and installation of arc-shaped metal pipes under working conditions such as complex main building environments.

[0037] Reference Figure 1 The arc tube prefabrication installation construction method includes the following steps: Deepening design: According to the building model or building design drawings, the curvature and arc length parameters of the curved area of ​​the building structure are obtained; the BIM technology is used to draw a detailed drawing of the curved tube 2 that matches the curved area of ​​the building, so that the curvature and arc length of the designed curved tube 2 are consistent with the curvature and arc length of the building structure.

[0038] Calculation of bending distance S: grab the pipe in the BIM model, 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.

[0039] Reference Figure 1 and Figure 2, Pipeline bending: The pipe is bent using a bending machine 1, and the bending machine 1 is provided with a control device 11, a propulsion device 12, a limit device 13 and a laser rangefinder 14. The limit devices 13 are arranged on both sides of the propulsion device 12, and the pipe fits tightly with the two limit devices 13. The control device 11 controls the feeding distance of the propulsion device 12 according to the calculated bending distance. The propulsion device 12 performs arc processing on the pipe according to the designed bending distance S. When the final bending distance is reached, the pushing of the propulsion device 12 is stopped to process the pipe into an arc-shaped pipe 2. In this embodiment, the laser rangefinder 14 is arranged on the workbench of the bending machine 1, and the laser rangefinder 14 is used to monitor the bending distance of the pipe, so as to facilitate the staff to accurately bend the arc-shaped pipe 2.

[0040] Reference Figure 2 and Figure 3 , in the calculation of the bending distance S, Among them, R is the radius of the arc, r is the radius of the pipe, S is the height vector, and A is the center distance of the limit device 13; the height vector, that is, the theoretical value of the bending distance of the arc tube 2 is accurately calculated. By adopting the above calculation formula to drive the bending distance of each arc tube 2, it is convenient for the staff to bend the arc tube 2 so that the curvature of the arc tube 2 is compatible with the arc appearance of the building; at the same time, the bending distance of the arc tube 2 is obtained by the above calculation formula, which can improve the roundness of the appearance of the arc tube 2 and improve the aesthetics of the building. In this embodiment, the value of the center distance A of the two limit devices 13 is 1792mm. When the center distance between the two limit devices 13 on the bending machine 1 is 1792mm, the bending machine 1 has a better bending effect on the arc tube 2, and while ensuring the bending effect of the arc tube 2, the structural damage of the arc tube 2 can be reduced. A certain length of straight ends are reserved on both sides of the arc section of the arc tube 2 to facilitate the connection of the arc tube 2 with other pipelines.

[0041] Reference Figure 1 A QR code "ID card" is posted on each of the processed arc tubes 2 to display the installation floor, system number, arc radius, arc length and other information of the arc tube 2; so as to facilitate the staff to install the arc tube 2 and improve the accuracy of the installation of the arc tube 2.

[0042] Ground pre-assembly: transport the processed arc tube 2 to the installation location, and carry out pre-assembly work on the ground according to the layout of the secondary tube in the detailed drawing.

[0043] Installation of supports and hangers: Extract the layout points of hangers, structural columns, etc. according to 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 places the fixed points of the hangers and marks the fixed points. The layout robot's layout positioning function is used to ensure the accuracy of pipeline installation, improve the aesthetics of the arc pipe 2, and shorten the construction period.

[0044] Pipeline installation: Complete the construction of the hanging bracket according to the fixing point of the hanging bracket, use the lifting hoist to lift the prefabricated arc pipe 2 and cable trough to the hanging bracket in turn, after confirming that the installation position is correct, use the pipe connector to tightly connect the adjacent arc pipes 2, and the pipe heads 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.

[0045] Pipeline pressure test: Perform pressure test on the assembled building pipelines. Fill the building pipelines with water and pressurize them to the design pressure, then maintain the pressure on the pipelines. After the pressure maintenance time, check whether the building pipelines are leaking. Pressure test the pipe diameter to ensure that there are no damaged points in the arc pipe 2, reducing subsequent repairs.

[0046] 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 arc pipe 2 deepening drawing.

[0047] The implementation principle of the arc pipe prefabrication and installation construction method of the present application embodiment is as follows: This technical solution determines the curvature, arc length and other information of the arc tube 2 that matches the arc shape of the building through BIM in-depth design and computer-aided calculation software; the three-point bending process is used to process the straight pipe into an arc tube 2, and the bending machine 1 bends each arc tube 2 from one section of the pipe to the other end of the pipe in sequence, thereby bending the pipe into an arc tube 2, and the arc tube 2 bent in sections with high precision is compatible with the arc appearance of the building. That is, this construction plan improves the construction efficiency of arc tube 2 processing and installation and saves construction costs on the premise of satisfying the coordination between the arc tube 2 and the building appearance; at the same time, the arc tube 2 is formed by bending several arc tubes 2 in sections, so that the arc tube 2 has good roundness and improves the appearance quality of the arc tube 2.

[0048] Example 2 The difference between this embodiment 2 and embodiment 1 is that: During the hoisting process of the arc tube 2, the lower bending point of the arc tube 2 is easy to fall, thereby affecting the hoisting of the arc tube 2. When the building has a high floor height, the arc tube 2 is likely to tilt or fall due to the height difference of the hoisting hoist during the hoisting process of the arc tube 2, thereby affecting the safety of the hoisting of the arc tube 2.

[0049] Therefore, in this embodiment, the pipeline installation step also includes the following steps: Reference Figure 4 and Figure 5, determine the most unfavorable lifting point: determine the lower bending point of the arc tube 2, the lower bending point of the arc tube 2 is used as the first lifting point 7 of the arc tube 2, at least one second lifting point 8 is set on both sides of the first lifting point 7 of the arc tube 2; a lifting hoop 4 is set on the arc tube 2, and a rubber gasket 5 is set between the lifting hoop 4 and the arc tube 2, and a first lifting ring 6 is set on the lifting hoop 4. The lifting hoop 4 sets the first lifting point 7 and the second lifting point 8 of the arc tube 2, and the first lifting ring 6 is used for hanging the lifting hoist. By setting a lifting point at the lower bending point of the arc tube 2, and also setting lifting points on both sides of the lower bending point; the arc tube 2 can be kept in a horizontal state during the lifting process, so as to facilitate the lifting and subsequent installation of the arc tube 2.

[0050] Reference Figure 4 and Figure 5 , install the anti-tilt assembly: both ends of the arc tube 2 are installed with anti-tilt assemblies; the anti-tilt assembly includes a plug-in block 31, an air bag 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. Figure 4 and Figure 6 The plug-in block 31 is stepped, and includes a first component 311 and a second component 312. The first component 311 is arranged outside the arc tube 2, and the second component 312 is inserted into the arc tube 2. The airbag 32 is arranged on the outer periphery of the second component 312. When the second component 312 and the airbag 32 are inserted into the arc tube 2, the airbag 32 is inflated so that the airbag 32 is fixed to the inner circumferential wall of the arc tube 2. The second hanging ring 33 and the third hanging ring 34 are fixed on the first component 311, and the upper fixed pulley 35 is fixed on the ceiling 17, and the upper fixed pulley 35 is located between the two ends of the arc tube 2. The lower fixed pulley 36 is fixed on the building floor 18, one end of the steel strand 37 is fixedly connected to the second suspension ring 33, and the other end of the steel strand 37 is successively looped around the upper fixed pulley 35 and the lower fixed pulley 36, and then the steel strand 37 is fixedly connected to the third suspension ring 34 at the other end of the arc tube 2.

[0051] Reference Figure 4 In this embodiment, the steel strand 37 is connected to the second lifting ring 33 through a double hook tensioner 38, that is, through the adjustment of the double hook tensioner 38, the tension of the steel strand 37 is increased, thereby increasing the sensitivity of the steel strand 37 to the angle adjustment of the arc tube 2. In the tilting assembly, the steel strand 37 retains a certain degree of freedom to reduce the friction between the steel strand 37 and the upper fixed pulley 35 and the lower fixed pulley 36, so as to facilitate the hoisting of the arc tube 2.

[0052] Reference Figure 4 , install the cable wind rope 10: tie the cable wind rope 10 at both ends of the arc tube 2; so that during the hoisting process of the arc tube 2, the shaking degree of the arc tube 2 can be reduced, thereby facilitating the staff to hoist the arc tube 2.

[0053] The implementation principle of the arc pipe prefabrication and installation construction method of the present application embodiment is as follows: Reference Figures 4 to 6 For the convenience of description, the two ends of the arc tube 2 are defined as the first end 21 and the second end 22, respectively. By setting anti-tilt components at the two ends of the arc tube 2, when the arc tube 2 tilts, for example, when the first end 21 of the arc tube 2 is lower than the second end 22, the first end 21 of the arc tube 2 will pull the steel strand 37, thereby applying a downward force to the second end 22 of the arc tube 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 tube 2. That is, through the limiting effect of the steel strand 37 on the two ends of the arc tube 2, the two ends of the arc tube 2 are kept on the same horizontal plane; thus, during the process of hoisting the arc tube 2 with a hoisting hoist, the risk of tilting and falling of the arc tube 2 can be reduced, and the safety of construction can be improved.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for prefabricating and installing an arc tube, characterized in that: The following steps are involved: Deepening design: Based on the building model or building design drawings, obtain the arc and arc length parameters of the arc area of ​​the building structure; Using BIM technology to draw a detailed drawing of the arc tube (2) that matches the arc area of ​​the building, so that the arc and arc length of the designed arc tube (2) are consistent with the arc and arc length of the building structure; Calculation of bending distance S: grab the pipe in the BIM model, divide the arc pipe (2) matching 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 provided with a pushing device (12) and a limiting device (13). The limiting devices (13) are arranged 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 of the pushing device (12) is stopped to process the pipe into an arc-shaped pipe (2). Ground pre-assembly: transport the processed arc tube (2) to the installation location, and perform pre-assembly work on the ground according to the layout of the secondary tube in the detailed drawing; Installation of supports and hangers: Extract the layout points of hangers, structural columns, etc. according to the optimized BIM model, and then import the BIM model and data into the controller of the layout robot. The layout robot will accurately measure and mark the fixed points of the hangers; Pipeline installation: the construction of the hanging bracket is completed according to the fixing point of the hanging bracket, and the prefabricated arc pipe (2) and the cable duct are hoisted onto the hanging bracket in sequence by using a hoisting hoist. After confirming that the installation position is correct, the adjacent arc pipes (2) and the pipe heads of the arc pipes (2) and the straight pipes are tightly connected by using pipe connectors, so that the arc pipes (2) and the straight pipes are assembled into a building pipeline; Pipeline acceptance: after the pipeline is installed, the pipeline is fully scanned, and the scanned data is entered into the robot system for comparison and verified with the detailed drawing of the arc pipe (2).

2. The arc tube prefabrication and installation construction method according to claim 1 is characterized in that: In the calculation of the bending distance S, Wherein, R is the arc radius, r is the pipe radius, S is the sagittal height, and A is the center distance of the limit device (13); the sagittal height, i.e. the theoretical value of the bending distance of the arc pipe (2), is accurately calculated.

3. The arc tube prefabrication and installation construction method according to claim 2 is characterized in that: The value of the center distance A between the two limiting devices (13) is 1792 mm.

4. The arc tube prefabrication and installation construction method according to claim 1 is characterized in that: The pipeline installation step also includes the following steps: Determine the most unfavorable lifting point: determine the lower bending point of the arc tube (2), the lower bending point of the arc tube (2) is used as the first lifting point (7) of the arc tube (2), and at least one second lifting point (8) is provided on both sides of the first lifting point (7) of the arc tube (2); a lifting hoop (4) is provided on the arc tube (2), and a rubber gasket (5) is provided between the lifting hoop (4) and the arc tube (2), a first lifting ring (6) is provided on the lifting hoop (4), and the first lifting point (7) and the second lifting point (8) of the arc tube (2) are provided on the lifting hoist (4), and the first lifting ring (6) is used for hanging a lifting hoist.

5. The arc tube prefabrication and installation construction method according to claim 4 is characterized in that: The pipeline installation step also includes the following steps: Installing the anti-tilt assembly: Anti-tilt assemblies are installed at both ends of the arc tube (2); the anti-tilt assembly comprises a plug-in block (31), an air bag (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-in block (31) is step-shaped, the plug-in block (31) comprises a first component (311) and a second component (312), the first component (311) is arranged on the outside of the arc tube (2), the second component (312) is inserted into the arc tube (2), the air bag (32) is arranged on the outer periphery of the second component (312), and the air bag (32) is arranged on the outer periphery of the second component (312). ) is used to be fixed to the inner circumferential wall of the arc tube (2); the second lifting ring (33) and the third lifting ring (34) are fixedly arranged on the first component (311); the upper fixed pulley (35) is fixedly arranged on the ceiling (17), and the upper fixed pulley (35) is located between the two ends of the arc tube (2); the lower fixed pulley (36) is fixedly arranged on the building floor (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 successively looped around the upper fixed pulley (35) and the lower fixed pulley (36), and then the steel strand (37) is fixedly connected to the third lifting ring (34) at the other end of the arc tube (2).

6. The arc tube prefabrication and installation construction method according to claim 5 is characterized in that: The steel strand (37) is connected to the second suspension ring (33) via a double-hook tensioner (38).

7. The arc tube prefabrication and installation construction method according to claim 1 is characterized in that: In the pipeline installation step, wind ropes (10) are tied at both ends of the arc-shaped pipe (2).

8. The arc tube prefabrication and installation construction method according to claim 1 is characterized in that: In the pipe bending step, a QR code "identity card" is affixed to each of the processed arc pipes (2) to display information such as the installation floor, system number, arc radius, arc length, etc. of the arc pipe (2).

9. The arc tube prefabrication and installation construction method according to claim 1, characterized in that: After completing the pipeline installation steps, The following steps are involved: Pipeline pressure test: Conduct a pressure test on the assembled building pipelines. Fill the pipelines with water and pressurize them to the design pressure. Then, the pipelines are subjected to pressure maintenance treatment. After the pressure maintenance time is reached, check whether there are any leaks in the pipelines.

10. The arc tube prefabrication and installation construction method according to claim 1, characterized in that: A laser distance meter (14) is also provided on the working table of the bending machine (1), and the laser distance meter (14) is used to monitor the bending distance of the pipeline.

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