Pipeline anti-deformation device and method
By using internal support and heavy object impact device in thin-walled pipes, the problem of pipeline collapse during welding is solved, and efficient anti-deformation effect is achieved, reducing material waste and cost.
Patent Information
- Application Number
- CN202410135701.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-08-01
AI Technical Summary
In the construction of nuclear power plants, thin-walled pipelines are prone to collapse at the welding site due to temperature changes during welding. The existing bracket connector tools are inconvenient to use and the one-time pass rate is low, which increases manufacturing cost.
Pipe anti-deformation device is adopted, including internal support members, rod members and heavy objects. The support members are sent into the pipeline through the rod members. After welding, the heavy objects are used to impact the projection to separate the support members from the inner wall of the pipeline to avoid collapse.
Effectively prevent pipeline welding collapse, improve welding quality, reduce material waste and construction costs, and improve construction efficiency.
Smart Images
Figure CN120395216A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of construction engineering, and more particularly to the field of pipeline welding. Background Art
[0002] During the construction of nuclear power plants, especially during the prefabrication and installation of nuclear islands, the quality control of welded products is particularly strict, and the quality of welding directly affects the safe operation of nuclear power plants. Pipelines are widely used in on-site construction, and the welding between pipelines and between pipelines and branch seats is also a relatively complex process. In some projects, pipelines need to be welded to branch seats, resulting in weld joints on the outer surface of the pipelines. When welding pipelines to branch seats and branches, due to large temperature changes during the welding process, the pipe walls at the weld joints are prone to collapse, especially for thin-walled pipes due to heat.
[0003] Existing technologies generally prevent the deformation of thin-walled main pipes by making bracket connection tools. The connection tool is connected to the branch seat to be welded on the thin-walled pipe during welding, so as to position the pipe seat during the welding process and pull the thin-walled pipe with a tendency to sag outward during welding, avoiding the occurrence of sagging. However, this tool is still inconvenient to use.
[0004] Since the welding between pipelines and small-diameter pipe fittings such as branch seats is inherently difficult and the first-pass qualification rate is low, and because the pipe walls are thin, the problem of welding collapse of the pipe wall surface is prone to occur. Therefore, the welding technology requirements are more stringent. Once the welding of the thin-walled main pipe collapses, the material needs to be replaced and welded again, and the branch seat also needs to be replenished, greatly increasing the manufacturing cost. Summary of the Invention
[0005] An object of the present invention is to provide a pipeline anti-deformation device that is convenient to use and can effectively support the inside of the pipeline to prevent the pipeline from deforming.
[0006] The pipeline anti-deformation device for achieving the above object includes an internal support member, a rod member, and a heavy object. The internal support member is used to extend into the pipeline to support the inner wall of the pipeline; the rod member has an adjustable length structure and includes a connection end and a sealing end. The connection end is connected to the internal support member, and the sealing end includes a self-protruding portion; the heavy object is movably sleeved on the rod member and is used to axially impact the protruding portion.
[0007] In one or more embodiments, the internal support member is a support member with an arc surface and a length less than or equal to the inner diameter of the pipeline.
[0008] In one or more embodiments, the internal support member is a disk or a cylinder with an outer diameter less than or equal to the inner diameter of the pipeline.
[0009] In one or more embodiments, the internal support is alternatively connected to the connection end.
[0010] In one or more embodiments, the rod includes a first rod, a second rod, and a threaded connection portion connecting the first rod and the second rod.
[0011] In one or more embodiments, the heavy object includes a hollow cavity, and the rod passes through the hollow cavity.
[0012] In one or more embodiments, the raised portion includes an annular flange.
[0013] In one or more embodiments, the wall thickness of the pipe is 2 mm to 20 mm.
[0014] Another object of the present invention is to provide a method for preventing deformation of a pipe using the above-mentioned pipe deformation prevention device. The method includes the following steps: determining the support portion of the pipe to be welded; using a rod to send an internal support into the support portion; after welding is completed, causing a heavy object to impact the raised portion, separating the internal support from the inner wall of the pipe, and removing the pipe deformation prevention device.
[0015] In one or more embodiments, the method further includes the following steps: placing the pipe on a branch pipe seat, and using the contact portion between the pipe and the branch pipe seat as the support portion.
[0016] The above-mentioned pipe deformation prevention device sends an internal support into the pipe through a rod. As a support device for the inner wall surface of the pipe, the stiffness and anti-deformation ability of the pipe are improved during subsequent welding, thereby avoiding the situation of welding collapse of the pipe; and since the pipe wall and the internal support are easily adhered after welding, a heavy object is used to impact the raised portion at the sealed end of the rod, and by means of the inertia of the rod body, the internal support is driven to separate from the pipe wall, so as to quickly remove the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The above-mentioned and other features, properties, and advantages of the present invention will become more obvious through the following description in conjunction with the drawings and embodiments, where:
[0018] Figure 1 is a schematic diagram of the pipe deformation prevention device;
[0019] Figure 2 is a schematic diagram of the pipe deformation prevention device, the pipe, and the branch pipe seat.
[0020] DESCRIPTION OF THE REFERENCE NUMERALS
[0021] 1 Branch pipe seat
[0022] 2 Internal support
[0023] 4 Pipe
[0024] 5 Rod
[0025] 6 Heavy object
[0026] 7 Protrusion
[0027] 51 Connection end
[0028] 52 Sealing end
[0029] 501 First rod
[0030] 502 Second rod Specific implementation manner
[0031] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.
[0032] It should be noted that these and subsequent other drawings are only examples, and they are not drawn under the condition of equal proportion, and should not be used to limit the actual claimed protection scope of the present invention.
[0033] When welding between pipes or between a pipe and a branch pipe socket, the temperature is relatively high. At the same time, considering the gravity influence of the welded parts themselves, the problem of pipe collapse is likely to occur at the welding part. Especially for thin-walled pipes with a thickness of 2 mm to 20 mm, it is very easy for the thin-walled pipes to collapse due to heat. As Figure 1 shown, the branch pipe socket can be a nuclear power plant nozzle (Boss head). Welding the Boss head on the main pipe can connect a branch pipe on the main pipe. Therefore, the branch pipe socket 1 with weight can easily cause the main pipe to collapse under the influence of welding heat.
[0034] Continue to refer to Figure 1 shown, the pipe anti-deformation device includes an internal support member 2, a rod 5, and a heavy object 6. The rod 5 is a structure with adjustable length. The two ends are respectively a connection end 51 and a sealing end 52. The connection end 51 is connected to the internal support member 2, and the sealing end 52 includes a protrusion 7. The heavy object 6 is movably sleeved on the rod 5 and is used to axially impact the protrusion 7 located at the sealing end 52.
[0035] Figure 1 is a schematic diagram of the pipe anti-deformation device extending into the pipe, Figure 2It is a schematic view from the sealed end 52 of the rod towards the connection end 51, from which it can be seen that the internal support member 2 is used to extend into the interior of the pipe 4 to support the inner wall of the pipe 4. In some embodiments, the internal support member 2 is a disc or a cylinder with an outer diameter less than or equal to the inner diameter of the pipe 4. For example, the internal support member 2 is a disc processed from a steel plate, and the outer diameter of the disc is determined by the inner diameter of the pipe, generally slightly smaller than the inner diameter of the main pipe. The internal support member 2 includes but is not limited to the above embodiments. In some other embodiments, the internal support member can also be a support member with an irregular shape having an arc surface and a length less than or equal to the inner diameter of the pipe.
[0036] The internal support member 2 is determined according to the inner diameter of the pipe 4 to be welded. Before construction, discs corresponding to different pipe inner diameters are processed, and during construction, discs of corresponding sizes are selected according to the actual specifications of the pipe. Therefore, the internal support member can be alternatively connected to the connection end 51 of the rod 5, such as being connected to the rod 5 through threads.
[0037] For pipes with a larger inner diameter, the size of the internal support member also increases accordingly, and the overall weight is heavier. During construction, to facilitate the operation of construction workers, while ensuring that the outer diameter of the disc remains unchanged and meeting the support requirements, a local excision is performed on the inside of the disc, and the remaining partial disc is retained to reduce the weight. After processing, holes are drilled in the remaining disc and then threads are processed for connecting the rod 5.
[0038] The insertion position of the internal support member 2 is determined by the welding part to be welded. In the embodiments shown in Figure 1 and Figure 2 , the internal support member 2 is supported inside the contact point G between the branch seat 1 and the pipe 4, aiming to play a role in internal support of the pipe, increase the stiffness and anti-deformation ability of the thin-walled pipe, and avoid deformation such as welding collapse of the pipe during subsequent welding.
[0039] The self-length of the rod 5 can be adjusted and its length is determined according to the distance between the welding part to be welded of the pipe and the pipe orifice. For example, in some embodiments, the rod 5 includes a first rod 501, a second rod 502, and a threaded connection part 503 connecting the first rod 501 and the second rod 502. The first rod 501 and the second rod 502 can be metal round bars. One end of the first rod 501 serves as the connection end 51, with external threads processed for connecting to the threaded hole reserved in the internal support member 2, and internal threads are processed at the other end for pairwise connection between the metal round bars; external threads are processed at one end of the second rod 502 for cooperating with the internal threads of the first rod 501 to play a role in adjusting the length of the rod, and the other end is configured as the sealed end 52.
[0040] It should be noted that the rod 5 can also include multiple rods connected through a threaded connection structure to adjust its own length.
[0041] After welding, due to the influence of heat and gravity, the internal support member 2 easily fits against the pipe 4. Therefore, a heavy object 6 is configured at the sealing end 52. As Figure 1 shown, the heavy object 6 is preferably of a hollow structure, including a hollow cavity. The rod passes through the hollow cavity, enabling the heavy object 6 to move freely along the axial direction of the slender rod. After welding is completed, the heavy object 6 is used to axially impact the convex portion 7 at the sealing end 52. Thus, by means of the inertia generated during the impact and the guiding action of the rod, the internal support member 2 can be conveniently separated from the inner wall of the pipe 4, and then the device can be removed.
[0042] The heavy object 6 impacts the convex portion 7 Figure 1 towards the lower left as shown. When impacting along the axial direction of the rod, the rod 5 also plays a guiding role, making the impact force of the heavy object 6 always along the axial direction of the rod 5. When impacting, the internal support member 2 inside the pipe is not prone to skew.
[0043] The convex portion 7 can be a spherical protrusion or an annular flange, or can be a baffle provided at the sealing end 52.
[0044] Combined with the introduction of the above device, a pipe anti-deformation method can also be understood. This method includes the following steps: determining the part of the pipe to be supported for welding; using a rod to send the internal support member into the inner wall of the pipe at the part to be supported; after welding is completed, making the heavy object impact the convex portion to separate the internal support member from the inner wall of the pipe, and removing the pipe anti-deformation device.
[0045] Select the size of the corresponding internal support component of the pipe according to the inner diameter of the thin-walled pipe to be welded; determine the length of the rod according to the distance between the welding position or the part to be supported and the main pipe nozzle. When the part to be supported is close to the nozzle, a short section of rod can be added at the nozzle or the method of threaded adjustment can be used to play a supporting role to ensure that the nozzle does not deform. One end of the rod is connected to the internal support component of the pipe, and the internal support component is pushed to the welding position.
[0046] The part to be supported is determined by the part to be welded. For example, when the pipe 4 is placed on the branch seat 1 and welding is carried out between the branch seat 1 and the pipe 4, the contact part between the pipe 4 and the branch seat 1 is used as the part to be supported, and a rod is used to send the internal support member into the inner wall of the pipe at the part to be supported.
[0047] After welding is completed, the inner wall of the pipe will fit against the support component. At this time, by using the heavy object to axially impact the sealing end, the internal support device of the pipe can be removed.
[0048] The above device and method effectively avoid the problem of the pipe collapsing and deforming when welding a branch pipe or a branch seat, avoid the problem of secondary use or scrapping of materials, save material costs, and improve construction efficiency; the device is also applicable to pipes of different specifications, is flexible in installation and disassembly, and has a relatively high reuse rate.
[0049] During the construction of a specific project, a total of 1,551 quality plans for welding other pipes or branch seats on thin-walled pipes were involved. The maximum allowable collapse value was 4 mm. Table 1 shows the measured collapse values of different pipes after using this device, indicating that the device can effectively reduce the pipe collapse problem during welding, effectively improve the project efficiency, and reduce economic losses.
[0050] Table 1 Measured Table of Main Pipe Collapse Data
[0051]
[0052]
[0053] It should be noted that the above content uses terms such as "first" and "second" to limit components. This is only for the convenience of differentiating the corresponding components. Without further declaration, these terms have no special meaning, so it should not be construed as a limitation on the protection scope of this application.
[0054] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification is not necessarily the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.
[0055] Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention all fall within the protection scope defined by the claims of the present invention.
Claims
1. Pipeline anti-deformation device, comprising: Internal support member, for extending into the pipeline interior to support the inner wall of the pipeline; Rod member, having an adjustable length structure, including a connection end and a sealing end, the connection end being connected to the internal support member, and the sealing end including a self-protruding portion; and Heavy object, movably sleeved on the rod member for axially impacting the protruding portion.
2. The pipeline anti-deformation device according to claim 1, characterized in that, The internal support member is a disc or a cylinder with an outer diameter less than or equal to the inner diameter of the pipeline.
3. The pipeline anti-deformation device according to claim 1, characterized in that, The internal support member is a support member with an arc surface and a length less than or equal to the inner diameter of the pipeline.
4. The pipeline anti-deformation device according to claim 2 or 3, characterized in that, The internal support member is replaceably connected to the connection end.
5. The pipeline anti-deformation device according to claim 1, characterized in that, The rod member includes a first rod member, a second rod member, and a threaded connection portion connecting the first rod member and the second rod member.
6. The pipeline anti-deformation device according to claim 1, characterized in that, The heavy object includes a hollow cavity, and the rod member penetrates through the hollow cavity.
7. The pipeline anti-deformation device according to claim 1, wherein The protruding portion includes an annular flange.
8. The pipeline anti-deformation device according to claim 1, characterized in that The wall thickness of the pipeline is 2 mm to 20 mm.
9. Method for preventing pipeline deformation, characterized in that, When using the pipeline anti-deformation device according to any one of claims 1-8, the method includes the following steps: Determine the support part of the pipeline to be welded; Use the rod member to send the internal support member into the support part; 10. The method according to claim 9, characterized in that, After welding is completed, make the heavy object impact the protruding portion to separate the internal support member from the inner wall of the pipeline, and remove the pipeline anti-deformation device. It further includes the following steps: Place the pipeline on the branch seat, and the contact part between the pipeline and the branch seat is used as the support part.