Installation technology of stainless steel pipe in preassembling stage

Abstract

The invention provides a mounting process of a stainless steel pipe in a preassembling stage, which comprises the following steps of: protecting the stainless steel pipe in a feeding process of the stainless steel pipe; welding preparation is conducted on the stainless steel pipe on the site; positioning and welding the stainless steel pipe before the upper section of the stainless steel pipe; and the welded stainless steel pipe is put into a subsection to be preassembled. Stainless steel pipes are welded on a construction site, so that the welding process is not affected by other frameworks of the ship body, the welding speed, precision and welding quality are effectively improved, the construction efficiency in the whole preassembling process is improved, the preassembling requirement of the stainless steel pipes of the ship body is met, and high practicability is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to an installation process of a stainless steel pipe in a pre-installation stage. Background Art

[0002] In the pre-installation of the hull piping system, the pre-installation of stainless steel pipes is particularly important. Due to the special material of stainless steel pipes, argon arc welding is required during welding. In addition, during the installation process, the hull construction may be encountered at the same time. The welding slag during the hull construction falls onto the stainless steel pipes, which can easily damage the surface of the stainless steel pipes and cause corrosion of the stainless steel pipes. At the same time, due to the large number of structures on the sections, welding the joints of the stainless steel pipes after the stainless steel pipes are installed on the sections may be affected by other hull structures. The construction space is small and the construction is very inconvenient. There are a series of problems such as slow welding speed, poor precision control, inadequate welding quality, and low construction efficiency.

[0003] Therefore, in order to solve the problem of inadequate welding of stainless steel pipes due to the segmented structure, an installation process that can improve construction efficiency and meet the pre-installation requirements of hull stainless steel pipes has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] An embodiment of the present invention provides an installation process for stainless steel pipes in the pre-installation stage, comprising the following steps: a first step, protecting the stainless steel pipes during the incoming material process; a second step, preparing for welding the stainless steel pipes on site; a third step, positioning and welding the stainless steel pipes before the stainless steel pipes are segmented; and a fourth step, placing the welded stainless steel pipes into segments for pre-installation.

[0005] In some embodiments, during the incoming material process of the stainless steel pipes, a protective step is performed on the stainless steel pipes, specifically including installing foam boards on both sides of the material rack storing the stainless steel pipes and installing pads at both ends of the bottom of the material rack during the incoming material transportation of the stainless steel pipes.

[0006] In some embodiments, during the incoming process of the stainless steel pipe, the step of protecting the stainless steel pipe also includes wrapping the surface of the stainless steel pipe with a protective cloth.

[0007] In some embodiments, the step of preparing the stainless steel pipe for welding is performed on site, specifically including preparing welding tools, stainless steel pipe clamping fixtures and positioning tools on the construction site after the stainless steel pipe arrives at the construction site.

[0008] In some embodiments, the steps of positioning and welding the stainless steel pipe before the stainless steel pipe is segmented include using a positioning tool to position the stainless steel pipe to be welded before the stainless steel pipe is segmented to ensure the straightness and horizontality of the stainless steel pipe; clamping the stainless steel pipe with a stainless steel pipe clamping tool to perform argon arc welding.

[0009] In some embodiments, before the stainless steel pipe is segmented and before the step of positioning and welding the stainless steel pipe, it also includes confirming the installation details of the stainless steel pipe according to the pipe system installation drawing, and determining the parts drawing of the stainless steel pipe according to the installation details drawing; finding the stainless steel pipe that needs to be argon arc welded based on the parts drawing; analyzing whether the stainless steel pipe can be smoothly hoisted into the segment for installation after welding, and grouping and welding the stainless steel pipe combinations that can be smoothly hoisted into the segment for installation after welding.

[0010] In some embodiments, the step of placing the welded stainless steel pipe into segments for pre-installation specifically includes, after the third step, hoisting the stainless steel pipe and placing it into segments for pre-installation.

[0011] In some embodiments, before the step of hoisting the stainless steel pipe, the step also includes performing UT treatment on the joints of the stainless steel pipe and protecting the stainless steel pipe with protective cloth.

[0012] In some embodiments, the stainless steel pipe butt joints that require argon arc welding are pipe butt joints and sleeve connections.

[0013] In some embodiments, the protective cloth includes at least one of triple-proof cloth and silicone cloth.

[0014] The beneficial effects brought by the present invention are as follows:

[0015] It can be seen from the above scheme that the embodiment of the present invention provides an installation process for stainless steel pipes in the pre-installation stage, and the stainless steel pipes are protected during transportation, which can effectively prevent the stainless steel pipes from bending, deformation, wear and bumping during transportation. After the stainless steel pipes arrive at the construction site, the stainless steel pipes that need to be welded by argon arc welding in sections are not welded in sections, but are directly welded by argon arc welding on the construction site. After welding, the sections are put into pre-installation. In this way, since the welding process of the stainless steel pipes is carried out on the construction site, the welding process of the stainless steel pipes is not affected by other structures of the hull, which effectively improves the welding speed, accuracy, and welding quality, thereby improving the construction efficiency of the overall pre-installation process, meeting the pre-installation requirements of stainless steel pipes in the hull, and having high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1One of the schematic flow diagrams showing a process for installing a stainless steel pipe in a pre-installation stage according to an embodiment of the present invention;

[0017] Figure 2 A second schematic flow chart showing a process for installing a stainless steel pipe in a pre-installation stage according to an embodiment of the present invention;

[0018] Figure 3 A schematic diagram showing the structure of a material storage box in a process for installing a stainless steel pipe in a pre-installation stage according to an embodiment of the present invention;

[0019] Figure 4 A structural schematic diagram showing a front view of a stainless steel pipe clamping tool in a stainless steel pipe installation process in a pre-installation stage according to an embodiment of the present invention;

[0020] Figure 5 A structural schematic diagram showing a top view of a stainless steel pipe clamping tooling in a stainless steel pipe installation process in a pre-installation stage according to an embodiment of the present invention.

[0021] In the figure, 1 is a material storage box, 12 is a material rack, 14 is a foam board, 16 is a cushion, 2 is a stainless steel pipe clamping tool, 22 is a clamping device, 24 is a clamping plate, 26 is a bolt, and 28 is a nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 As shown, an embodiment of the present invention provides a process for installing a stainless steel pipe in a pre-installation stage, and the process may include the following steps:

[0024] S102: Protect the stainless steel pipes during their incoming material processing.

[0025] S104: On site, prepare for welding of stainless steel pipes.

[0026] S106: Before the stainless steel pipe is segmented, the stainless steel pipe is positioned and welded.

[0027] S108: Place the welded stainless steel pipe into sections for pre-assembly.

[0028] According to the installation process of stainless steel pipes in the pre-installation stage provided by the present invention, the stainless steel pipes are protected during transportation, which can effectively prevent bending, deformation, wear and collision during transportation, and improve the installation accuracy and construction efficiency of the stainless steel pipes. The hull segment is a number of parts that the hull structure is decomposed into according to a certain division principle. The segment is a large group of hulls in the process of ship construction. The large group of hulls is also a large assembly of ship segments, which belongs to a production stage of ship segment assembly, that is, the production process of assembling parts and components into segments. In this application, the segment can be understood as a hull structure assembled from some parts and other parts of the ship. After the stainless steel pipe arrives at the construction site, the stainless steel pipe that needs to be welded with argon arc welding on the segment is not welded on the segment, but directly prepared for welding construction on the construction site, so that the stainless steel pipe is welded with argon arc welding on the site, and then put into the segment for pre-installation after welding. The stainless steel pipe and the segment are fixedly connected by a bracket, and the connection stability between the two is ensured by a pipe clamp. The stainless steel pipe is a common stainless steel pipe on the market, which can be a TP316L (a type of stainless steel pipe) stainless steel pipe or a TP304L (a type of stainless steel pipe) stainless steel pipe. In this way, since the welding process is carried out on the construction site, the welding process of the stainless steel pipe is not affected by other structures of the hull, which effectively improves the welding speed, accuracy, and welding quality, thereby improving the construction efficiency in the overall pre-installation process, meeting the pre-installation requirements of the hull stainless steel pipe, and having high practicality. In some embodiments, during the incoming material process of the stainless steel pipe, the step of protecting the stainless steel pipe specifically includes installing foam plates 14 on both sides of the material rack 12 storing the stainless steel pipe during the incoming material transportation of the stainless steel pipe, and installing pads 16 at both ends of the bottom of the material rack 12.

[0029] like Figure 3 As shown, in this embodiment, the material rack 12 has two opposite side panels. During the transportation of the stainless steel pipe, foam panels 14 are installed on the two side surfaces (side panels) of the material rack 12, and wooden blocks 16 are placed at both ends of the bottom of the material rack 12. The two ends of the bottom of the material rack 12, that is, the opposite ends of the bottom of the material rack 12 that are not connected to the side panels, can effectively prevent the stainless steel pipe from bending, deformation, wear, and bumping during transportation, thereby improving the installation accuracy and construction efficiency of the stainless steel pipe. The material rack 12, wooden blocks 16 and foam panels 14 are collectively referred to as a storage box 1.

[0030] In some embodiments, during the incoming process of the stainless steel pipe, the step of protecting the stainless steel pipe also includes wrapping the surface of the stainless steel pipe with a protective cloth.

[0031] In this embodiment, by wrapping the stainless steel pipe during the incoming material process, the stainless steel pipe can be further prevented from collision and deformation during transportation.

[0032] In some embodiments, the step of preparing the stainless steel pipe for welding is performed on site, specifically including preparing welding tools, stainless steel pipe clamping tool 2 and positioning tools on the construction site after the stainless steel pipe arrives at the construction site.

[0033] In this embodiment, in the welding preparation stage of the stainless steel pipe, the stainless steel pipe clamping tool 2 can have a good tightening effect on the stainless steel pipe to prevent the stainless steel pipe from moving during the subsequent welding process. The positioning tool can well ensure the straightness and horizontality of the stainless steel pipe and ensure the accuracy of subsequent welding.

[0034] like Figure 4 and Figure 5 As shown, the stainless steel pipe clamping tool 2 includes a clamping device 22, a clamping plate 24, a bolt 26 and a nut 28. The clamping device 22 includes an upper clamping device and a lower clamping device. The clamping plate 24 includes an upper clamping plate and a lower clamping plate. Through holes or threaded holes are provided in the upper clamping plate and the lower clamping plate so that the bolt 26 can pass through the upper clamping plate and the lower clamping plate and be tightened by the nut 28. Then, the clamping device 22 composed of the upper clamping device and the lower clamping device is used to clamp and position the stainless steel pipe to prevent the stainless steel pipe from moving during the subsequent welding process.

[0035] In some embodiments, the steps of positioning and welding the stainless steel pipe before the stainless steel pipe is segmented specifically include: before the stainless steel pipe is segmented, using a positioning tool to position the stainless steel pipe to be welded to ensure the straightness and horizontality of the stainless steel pipe; clamping the stainless steel pipe by a stainless steel pipe clamping tool 2 to perform argon arc welding.

[0036] In some embodiments, before the stainless steel pipe is segmented and before the step of positioning and welding the stainless steel pipe, it also includes confirming the installation details of the stainless steel pipe according to the pipe system installation drawing, and determining the parts drawing of the stainless steel pipe according to the installation details drawing; finding the stainless steel pipe that needs to be argon arc welded based on the parts drawing; analyzing whether the stainless steel pipe can be smoothly hoisted into the segment for installation after welding, and grouping and welding the stainless steel pipe combinations that can be smoothly hoisted into the segment for installation after welding.

[0037] In this embodiment, the detailed installation drawing of the stainless steel pipe is confirmed based on the pipe system installation drawing, and the part number of the stainless steel pipe is found based on the detailed installation drawing. Then, the part drawing of the stainless steel pipe is found based on the part number, and the stainless steel pipe that needs to be argon arc welded is found. The stainless steel pipe combinations that can be smoothly hoisted into the sections for installation after welding are grouped and welded.

[0038] In some embodiments, the step of placing the welded stainless steel pipe into segments for pre-installation specifically includes, after the third step, hoisting the stainless steel pipe and placing it into segments for pre-installation.

[0039] In this embodiment, after the stainless steel pipe is welded on the construction site, the stainless steel pipe is placed in the segment for pre-installation by hoisting. Of course, the installation method is not limited to these, as long as the stainless steel pipe can be transported to the hull segment for pre-installation, it should be within the protection scope of the present invention, and will not be listed here one by one.

[0040] In some embodiments, before the step of hoisting the stainless steel pipe, the step also includes performing UT treatment on the joints of the stainless steel pipe and protecting the stainless steel pipe with protective cloth.

[0041] In this embodiment, after the stainless steel pipe is welded, it is also necessary to perform UT (Ultrasonic Testing) on ​​the welded stainless steel pipe to ensure the quality of the argon arc welding seam of the stainless steel pipe. After the inspection is completed, the stainless steel pipe is hoisted into sections for installation.

[0042] In some embodiments, the stainless steel pipe butt joints that require argon arc welding are pipe butt joints and sleeve connections.

[0043] In some embodiments, the protective cloth includes at least one of triple-proof cloth and silicone cloth.

[0044] Of course, the protective fabrics are not limited to these. Any protective material that can protect the stainless steel pipe during transportation should be within the protection scope of the present invention and will not be listed here one by one.

[0045] like Figure 2 As shown, an embodiment of the present invention provides an installation process of a stainless steel pipe in a pre-installation stage, and the installation process may include the following steps:

[0046] S202: Protection of stainless steel pipes during transportation, including installing foam boards on both sides of the rack to prevent the stainless steel pipes from being squeezed and bumped, placing wooden blocks at both ends of the bottom of the rack, and wrapping the stainless steel pipes with three-proof cloth.

[0047] S204: Construction preparation of stainless steel pipes on site, specifically including making welding preparations on site, preparing welding tools, stainless steel pipe clamping fixtures and positioning tools.

[0048] S206: Before the stainless steel pipe is installed in the segment, the stainless steel pipe is positioned and welded, specifically including first finding the installation details of the stainless steel pipe according to the pipe system installation drawing; then finding the stainless steel pipe that needs to be welded by argon arc welding through the pipe parts drawing, wherein the butt joint form of the stainless steel pipe that needs to be welded by argon arc welding is pipe butt joint and sleeve connection; then analyzing whether the stainless steel pipe can be smoothly hoisted into the segment for installation after welding, and welding the stainless steel pipes that can be welded in groups; then positioning the stainless steel pipes that need to be welded by marking to ensure the straightness and horizontality of the stainless steel pipes; finally, clamping the stainless steel pipes with a stainless steel pipe clamping tooling to perform argon arc welding construction;

[0049] S208: After the welding of the stainless steel pipe is completed, the upper section is pre-installed, which specifically includes UT treatment of the stainless steel pipe joints and protection of the stainless steel pipe with three-proof cloth. After protection, the stainless steel pipe is hoisted and the upper section is pre-installed.

[0050] In this embodiment, during the transportation of stainless steel pipes, wooden blocks 16 are placed at the front and rear ends of the bottom of the rack 12, foam boards 14 are installed on both sides of the rack 12, and the stainless steel pipes are wrapped with three-proof cloth, which can effectively prevent collision and deformation of the stainless steel pipes during transportation. After the stainless steel pipes arrive at the site, they are not directly installed in sections. First, according to the pipe system installation diagram and the pipe parts diagram, find out the pipelines that can be welded in advance, prepare the stainless steel pipe clamping tooling 2, and position the relevant pipelines. Argon arc welding is performed on the docking interface and the sleeve mouth of the stainless steel pipe on the site. Welding on the site is not affected by the hull frame, and welding is convenient. After the stainless steel pipe is welded, UT treatment is performed to ensure the quality of the argon arc welding weld of the stainless steel pipe. After the inspection is completed, the stainless steel pipe is hoisted into the section for installation. The installation process of the stainless steel pipe provided by the present invention can meet the pre-installation requirements of the stainless steel pipe, and the operation is simple, the effect is significant, and it has high practicality.

[0051] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A process for installing stainless steel pipes in the pre-installation stage, characterized in that: The steps include: The first step is to protect the stainless steel pipe during the incoming process of the stainless steel pipe; The second step is to prepare the stainless steel pipe for welding on site; The third step is to position and weld the stainless steel pipe before the stainless steel pipe is segmented; The fourth step is to place the welded stainless steel pipe into the segment for pre-assembly.

2. The installation process of the stainless steel pipe in the pre-installation stage according to claim 1 is characterized in that: In the process of receiving the stainless steel pipe, the stainless steel pipe is protected, which specifically includes: During the transportation of the stainless steel pipes, foam boards are respectively installed on both sides of the rack storing the stainless steel pipes, and pads are respectively installed at both ends of the bottom of the rack.

3. The installation process of the stainless steel pipe in the pre-installation stage according to claim 2 is characterized in that: The step of protecting the stainless steel pipe during the incoming process of the stainless steel pipe also includes: The surface of the stainless steel pipe is wrapped with protective cloth.

4. The installation process of the stainless steel pipe in the pre-installation stage according to claim 1 is characterized in that: The steps of preparing the stainless steel pipe for welding on site specifically include: After the stainless steel pipe arrives at the construction site, welding tools, stainless steel pipe clamping tools and positioning tools are prepared on the construction site.

5. The installation process of the stainless steel pipe in the pre-installation stage according to claim 4 is characterized in that: The step of positioning and welding the stainless steel pipe before the stainless steel pipe is segmented specifically includes: Before the stainless steel pipe is segmented, the stainless steel pipe to be welded is positioned using the positioning tool to ensure the straightness and horizontality of the stainless steel pipe; The stainless steel pipe is clamped by the stainless steel pipe clamping tool and argon arc welding construction is performed.

6. The installation process of the stainless steel pipe in the pre-installation stage according to claim 5, characterized in that: Before the stainless steel pipe is segmented, before the steps of positioning and welding the stainless steel pipe, the installation process of the stainless steel pipe in the pre-installation stage also includes: According to the pipe system installation drawing, the detailed installation drawing of the stainless steel pipe is confirmed, and the parts drawing of the stainless steel pipe is determined according to the detailed installation drawing; Find out the stainless steel pipe that needs to be welded by argon arc welding based on the parts drawing; It is analyzed whether the stainless steel pipes can be smoothly hoisted into the sections for installation after welding, and the stainless steel pipes that can be smoothly hoisted into the sections for installation after welding are grouped and welded.

7. The installation process of the stainless steel pipe in the pre-installation stage according to any one of claims 4 to 6, characterized in that: The step of placing the welded stainless steel pipe into the segment for pre-assembly specifically includes: After the third step is completed, the stainless steel pipe is hoisted and placed into the segment for pre-installation.

8. The installation process of the stainless steel pipe in the pre-installation stage according to claim 7, characterized in that: Before the step of hoisting the stainless steel pipe, the installation process of the stainless steel pipe in the pre-installation stage also includes: The butt joints of the stainless steel pipes are subjected to UT treatment, and the stainless steel pipes are protected with protective cloth.

9. The installation process of the stainless steel pipe in the pre-installation stage according to claim 8, characterized in that: The stainless steel pipe butt joint forms requiring argon arc welding are pipe butt joint and sleeve connection.

10. The installation process of the stainless steel pipe in the pre-installation stage according to claim 8, characterized in that: The protective cloth includes at least one of triple-proof cloth and silicone cloth.

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