A method for installing a long distance angularly continuously graded pipeline

Abstract

The application discloses a kind of installation methods of long-distance angle continuous gradual pipeline, the pipeline is arranged between race track support column below race track, the installation method includes positioning and installing pipeline insulation support and pipeline support, according to the bending curvature of pipeline, the angle of each bending position is set: the bending angle of segmented pipeline is controlled between 3 ° and 30 °, the segmented pipeline is laid out and numbered, the segmented pipeline is prefabricated and welded offline, the welded seam of completed welding is nondestructively tested, prefabricated pipeline is transported and welded in situ and is inspected, etc.Step.The pipeline installation method of the application is simple and effective, solves the problem of long-distance pipeline segmented installation below race track, and the quality control of pipeline installation is integrated into the installation process while installing pipeline, which saves construction period and ensures quality;It can be widely used in the installation of refrigeration pipeline and heating pipeline, and has wide application range.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction technology, and more specifically, to a method for installing a long-distance pipeline with continuously varying angles. Background Technology

[0002] The National Sliding Centre's track is 1975 meters long with a vertical drop of 121 meters and contains 16 curves, including a 360-degree hairpin bend. The main refrigeration pipe is located between the track support pillars beneath the track and consists of two branches: a supply pipe and a return pipe. This pipeline follows the winding, meandering path of the track, characterized by its long distance and continuously changing angles. Because the angles of each section of this pipeline are different, conventional piping installation methods made it difficult to complete the installation work to a high standard within the stipulated timeframe.

[0003] Chinese invention patent application No. 202110610179.2 discloses a method for segmented construction of long-distance ductile iron pipelines to achieve pipeline connection at bends, but it does not solve the problem of pipeline installation with continuously changing angles over long distances. Chinese utility model patent application No. 201822136180.2 discloses a device for installing long-distance pipelines on steep slopes. This device can move under the traction of a winch during construction and uses manual and electric lifting devices to correct the pipeline position, solving the problem of cranes being unable to lower pipes and difficulties in pipeline connection during pipeline installation on steep slopes. However, this device does not address the problem of pipeline installation with continuously changing angles under track conditions.

[0004] Therefore, developing a method for installing long-distance, continuously gradually changing angle pipes under a race track is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] In view of the above-mentioned defects in the existing technology, the present invention provides an installation method for a long-distance, continuously gradually changing angle pipeline to solve the current problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for installing a long-distance, continuously tapering duct, characterized in that the duct is arranged between track support columns below the track, and the installation method includes the following steps:

[0008] Step S1: Layout and measure the installation position of the pipeline to determine the axial positioning of the pipeline insulation support and pipeline bracket;

[0009] Step S2: Based on the positioning of the track support column and the dimensions of the pipe, determine the radial positioning of the pipe, the pipe insulation support, and the pipe bracket.

[0010] Step S3: Install the pipe insulation support and pipe bracket;

[0011] Step S4: Divide the pipe into sections according to the curvature of the pipe and set the angle of each bending position: the bending angle of the pipe section is controlled between 3° and 30°; when the bending angle is less than 12°, the assembly is completed by pipe beveling; when the bending angle is greater than 12°, finished elbows are installed between the pipe sections.

[0012] Step S5: Arrange and cut the segmented pipes, bevele the processed segmented pipes, inspect the inner wall of the pipes and seal them, and number them.

[0013] Step S6: For the offline prefabrication and welding of the segmented pipeline, non-destructive testing is performed on the welds after welding.

[0014] Step S7: Transport the prefabricated pipes to the installation location according to the number in Step S5, and perform team welding after positioning; perform non-destructive testing on the welded seams, and fix the pipes to complete the installation after the test is qualified.

[0015] The described pipeline installation method is simple and effective in enabling rapid assembly and welding between segmented pipelines, solving the problem of long-distance pipeline installation under the track. Furthermore, it integrates quality control of pipeline installation into the installation process, saving construction time and ensuring quality.

[0016] Preferably, the pipeline is a refrigeration pipeline or a heating pipeline. The refrigeration pipeline can transport cold fluids or gases, and the heating pipeline can transport hot fluids or gases.

[0017] Preferably, the offline prefabrication welding in step S6 employs movable joint welding. This feature improves welding quality.

[0018] Preferably, the welding method in steps S6 and S7 is argon arc welding or argon-electric welding.

[0019] Preferably, the welding requirements in steps S6 and S7 are that the pipe butt welds meet 100% pass rate in radiographic testing, and the fillet welds meet 100% pass rate in penetrant testing. This feature effectively ensures the quality of pipe installation.

[0020] Preferably, the X-ray detection technology level is not lower than AB level, and the qualification level is not lower than II level.

[0021] Preferably, the penetration test qualification level is Level I.

[0022] Compared with the prior art, the above invention has the following advantages or beneficial effects:

[0023] (1) It solves the problem of segmented installation of long-distance pipes under the track in a simple and effective way;

[0024] (2) Pipelines can be quickly assembled and welded, shortening the construction period while ensuring installation quality;

[0025] (3) It can be widely used for the installation of refrigeration pipes and heating pipes, and has a wide range of applications.

[0026] This invention provides a method for installing a long-distance, continuously tapered pipe. The pipe is arranged between track support columns below the racetrack. The installation method includes positioning and installing pipe insulation supports and pipe brackets; segmenting the pipe according to its curvature and setting the angle at each bend position (the bend angle of each segment is controlled between 3° and 30°); arranging, cutting, and numbering the segmented pipes; offline prefabrication and welding of some of the segmented pipes; non-destructive testing of the welds; transporting the prefabricated pipes; on-site welding; and quality inspection. This invention's pipe installation method is simple and effectively solves the problem of segmented installation of long-distance pipes below racetracks. Furthermore, it integrates quality control into the installation process, saving time and ensuring quality. It can be widely used for the installation of refrigeration and heating pipes, with a wide range of applications. Attached Figure Description

[0027] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; the emphasis is on illustrating the gist of the invention.

[0028] Figure 1 This is a partial structural diagram of the pipe installation of the present invention;

[0029] Among them, 1 is the track, 10 is the track support column, 2 is the pipe support, 3 is the pipe, and 4 is the pipe insulation support. Detailed Implementation

[0030] The structure of the present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, a method for installing a long-distance, continuously tapering duct is described. The refrigeration duct 3 is arranged between the track support columns 10 below the National Bobsleigh and Luge Center track 1. The installation method includes the following steps:

[0033] Step S1: Layout and measure the installation position of pipe 3 to determine the axial positioning of pipe insulation support 4 and pipe bracket 2;

[0034] Step S2: Based on the positioning of the track support column 10, determine the radial positioning of the pipe, pipe insulation support and pipe bracket according to the drawing dimensions of the pipe 3;

[0035] Step S3: Install the pipe insulation support and pipe bracket;

[0036] Step S4, (3) In the Building Information Modeling (BIM) system, the drawings are refined, the pipes are segmented according to the curvature of the pipes and the angle of each bending position is set: the bending angle of the segmented pipes is controlled between 3° and 30°; when the bending angle is less than 12°, the assembly is completed by beveling the pipes; when the bending angle is greater than 12°, finished elbows are set between the segmented pipes.

[0037] Step S5: Arrange and cut the segmented pipes; perform beveling, inner wall inspection, and sealing on the processed segmented pipes; and number them. Figure 1 The numbering segments shown are 0+803, 0+805, and 0+807.

[0038] Step S6: For the offline prefabrication and welding of the segmented pipeline, perform non-destructive testing on the welds after welding; try to ensure that as many pipeline welds as possible are welded with movable joints, and use argon arc welding or argon-electric welding.

[0039] Step S7: Transport the prefabricated pipes to the installation location according to the numbers in Step S5, and perform team welding after positioning; perform non-destructive testing on the welds, and fix the pipes to complete the installation after passing the test. The welding method is argon arc welding or argon-electric welding.

[0040] The welding requirements are that butt welds of pipes must pass 100% of radiographic testing, and fillet welds must pass 100% of penetrant testing. The radiographic testing technology level must be no lower than AB, and the pass level no lower than II. The penetrant testing pass level is I.

[0041] Example 2

[0042] An installation method for a long-distance, continuously tapering pipe is disclosed, the steps of which are similar to those in Embodiment 1. The difference from Embodiment 1 is that the pipe is a heating pipe.

[0043] In summary, this invention discloses an installation method for a long-distance, continuously tapered pipe. The pipe is arranged between track support columns beneath the track. The installation method includes positioning and installing pipe insulation supports and pipe brackets; segmenting the pipe according to its curvature and setting the angle at each bend: the bending angle of each segment is controlled between 3° and 30°; arranging, cutting, and numbering the segmented pipes; offline prefabrication and welding of some of the segmented pipes; non-destructive testing of the welds; transporting the prefabricated pipes; on-site welding; and quality inspection. This invention's pipe installation method is simple and effectively solves the problem of segmented installation of long-distance pipes beneath a track. Furthermore, it integrates quality control into the installation process, saving time and ensuring quality. It can be widely used for the installation of refrigeration and heating pipes, with a wide range of applications.

[0044] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0045] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A method for installing a long-distance, continuously varying angle pipe, characterized in that, The pipes are arranged between the track support pillars below the track, and the installation method includes the following steps: Step S1: Layout and measure the installation position of the pipeline to determine the axial positioning of the pipeline insulation support and pipeline bracket; Step S2: Based on the positioning of the track support column and the dimensions of the pipe, determine the radial positioning of the pipe, the pipe insulation support, and the pipe bracket. Step S3: Install the pipe insulation support and pipe bracket; Step S4: Divide the pipe into sections according to the curvature of the pipe and set the angle of each bending position: the bending angle of the pipe section is controlled between 3° and 30°; when the bending angle is less than 12°, the assembly is completed by pipe beveling; when the bending angle is greater than 12°, finished elbows are installed between the pipe sections. Step S5: Arrange and cut the segmented pipes, bevele the processed segmented pipes, inspect the inner wall of the pipes and seal them, and number them. Step S6: For the offline prefabrication and welding of the segmented pipeline, non-destructive testing is performed on the welds after welding. Step S7: Transport the prefabricated pipes to the installation location according to the number in Step S5, and perform team welding after positioning; perform non-destructive testing on the welded seams, and fix the pipes to complete the installation after the test is qualified.

2. The installation method of a long-distance, angle-gradiently changing pipeline according to claim 1, characterized in that, The pipeline is either a refrigeration pipeline or a heating pipeline.

3. The installation method of a long-distance angle-gradient pipeline according to claim 1 or 2, characterized in that, The offline prefabrication welding in step S6 adopts movable joint welding.

4. The installation method of a long-distance angle-gradient pipeline according to claim 1 or 2, characterized in that, The welding methods in steps S6 and S7 are argon arc welding or argon-electric welding.

5. The installation method of a long-distance, angle-gradiently changing pipeline according to claim 1 or 2, characterized in that, The welding requirements in steps S6 and S7 are that the pipe butt welds must pass 100% of the radiographic testing, and the fillet welds must pass 100% of the penetrant testing.

6. The installation method of a long-distance, angle-gradiently changing pipeline according to claim 5, characterized in that, The radiation detection technology level shall be no lower than AB level, and the qualification level shall be no lower than II level.

7. The installation method of a long-distance, angle-gradiently changing pipeline according to claim 5, characterized in that, The penetration test qualification level is Level I.

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