A pipe arrangement method and a pipe structure based on a bend

Abstract

This invention discloses a pipe layout method and pipe structure based on bends. The method includes: S1, using a room as a pipe layout unit, identifying all process pipes within the room and extracting process pipe information; S2, determining the inlet and outlet positions of each process pipe within the room; S3, determining the minimum number of bends for each process pipe based on its inlet and outlet positions; S4, ranking the bend weights of each process pipe based on its pipe diameter, wall thickness, grade, minimum bending radius, and number of bends; S5, prioritizing the layout of process pipes with higher bend weights based on this ranking. This invention uses a room as a layout design unit and, by comprehensively considering the process pipes within the room, enables process pipes to utilize bends as much as possible, improving the utilization rate and efficiency of bends.

Description

Technical Field

[0001] This invention specifically relates to a pipe arrangement method and pipe structure based on bends. Background Technology

[0002] In nuclear power plants, bends and elbows are two commonly used methods for changing the flow direction of process fluids. Compared to elbows, bends offer more flexibility in weld placement, effectively reducing the number of welds and thus the total number of welds in the project, thereby reducing the amount of installation work. Despite the significant advantage in reducing the number of welds, bends are subject to space constraints during pipeline layout design because they occupy more space than elbows. In particular, when multiple process pipelines are located within a single room and laid out by different designers, the pipelines may interact with each other.

[0003] At this time, it is difficult to use bends, resulting in low utilization of bends.

[0004] In addition, the profitability and difficulty of pipe bending are affected by factors such as different pipe diameters, wall thicknesses, grades, minimum bending radii, whether in-service inspection is required, and the number of bends, making it difficult to guarantee the profitability of pipe bending. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the existing technology by providing a pipe layout method and pipe structure based on bends. Taking a room as the layout design unit, by comprehensively considering the process pipes in the room, the process pipes can be made to use bends as much as possible, thereby improving the utilization rate and benefits of bends.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is:

[0007] According to a first aspect of the present invention, a pipe arrangement method based on bends is provided, comprising:

[0008] S1, using the room as a piping layout unit, identifies all process piping in the room and extracts process piping information;

[0009] S2, determine the inlet and outlet locations of each process pipe within the room;

[0010] S3, Determine the minimum number of bends in the process pipeline based on the inlet and outlet positions of each process pipeline;

[0011] S4. Based on the pipe diameter, wall thickness, grade, minimum bending radius, and number of bends of each process pipeline, sort the bend weights of the process pipelines.

[0012] S5, based on the weight of the bends, prioritize the placement of process pipes with higher bend weights.

[0013] Preferably, the ranking of the bend weights of the process piping is determined by a hierarchical screening method.

[0014] Preferably, the hierarchical screening includes:

[0015] Calculate the product of pipe diameter and minimum number of bends, use it as the first-level screening weight, and sort the products from largest to smallest.

[0016] Within the same primary screening weight, the pipeline level is used as the secondary screening weight, and the pipelines are sorted from high to low.

[0017] Within the same secondary screening weight, the minimum bending radius is used as the tertiary screening weight, and the samples are sorted from smallest to largest according to the minimum bending radius;

[0018] Within the same three-level screening weight, wall thickness is used as the fourth-level screening weight, and the screens are sorted from largest to smallest wall thickness.

[0019] Preferably, when ranking the bend weights of process pipelines based on their diameter, wall thickness, grade, minimum bending radius, and number of bends, the method further includes:

[0020] The weights of process pipeline bends are ranked according to whether they require in-service inspection and whether the bends are at standard angles.

[0021] Preferably, the hierarchical screening further includes:

[0022] Within the same four-level screening weight, whether or not an active duty check is required is used as the fifth-level screening weight, and the results are sorted from those that do not require an active duty check to those that do require an active duty check.

[0023] Within the same five-level filtering weight, whether the turn is at a standard angle is used as the sixth-level filtering weight, and the turns are sorted from those at a standard angle to those at a non-standard angle.

[0024] Preferably, the method further includes a modification step of the existing pipeline layout, including:

[0025] S6. Based on the weight of the bends, prioritize modifying the process pipes with higher weights. If an item collision occurs, ensure that the arrangement of the process pipes with higher weights remains unchanged, while modifying the arrangement of the process pipes with lower weights.

[0026] According to a second aspect of the present invention, a pipe structure is provided, wherein the pipe structure is arranged using the method described above.

[0027] Beneficial effects:

[0028] The present invention relates to a pipe layout method and pipe structure based on bends. This pipe layout uses a room as the layout design unit. Based on the design information and inlet / outlet positions of the process pipes, the process pipes within the room are comprehensively considered. By calculating and ranking the bend weights of the process pipes within the room, the overall process pipes are prioritized. According to the layout principle that the higher the ranking, the higher the benefit of the bend and the lower the difficulty of the bend, the process pipes with higher ranking are given priority in the layout, and bends are given priority in the layout. This ensures that the process pipes with higher ranking can use bends as much as possible for turning, thereby improving the utilization rate and benefit of bends. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the pipe arrangement method based on bends according to an embodiment of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0031] In the description of this invention, it should be noted that the terms "above" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience and simplification of the description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] This invention discloses a pipe arrangement method based on bends, comprising:

[0034] S1, using the room as a piping layout unit, identifies all process piping in the room and extracts process piping information;

[0035] S2, determine the inlet and outlet locations of each process pipe within the room;

[0036] S3, Determine the minimum number of bends in the process pipeline based on the inlet and outlet positions of each process pipeline;

[0037] S4. Based on the pipe diameter, wall thickness, grade, minimum bending radius, and number of bends of each process pipeline, sort the bend weights of the process pipelines.

[0038] S5, based on the weight of the bends, prioritize the placement of process pipes with higher bend weights.

[0039] Accordingly, the present invention also discloses a pipeline structure, wherein the pipeline structure is arranged using the method described above.

[0040] Example 1

[0041] This embodiment discloses a pipe arrangement method based on bends, such as... Figure 1 As shown, it includes:

[0042] Step S1: Using a room as a piping layout unit, identify all process pipes in the room and extract information about all process pipes in the room, including pipe diameter, wall thickness, grade, minimum bending radius, number of bends, etc.

[0043] Step S2: Determine the inlet position (i.e., the position entering the room) and outlet position (i.e., the position leaving the room) of each process pipeline in the room. For process pipelines that are only arranged in the room, their inlet and outlet positions are defined according to their actual locations.

[0044] Step S3: Determine the minimum number of bends in the process pipelines based on the inlet and outlet positions of each process pipeline.

[0045] Step S4: Based on the pipe diameter, wall thickness, grade, minimum bending radius, and number of bends of each process pipe, sort the bend weights of the process pipes. The higher the ranking, the greater the benefit of using the bend. Designers should prioritize arranging the process pipes with higher rankings as bends based on the specific conditions of the room. In other words, the higher the ranking, the higher the priority for using bends. However, whether or not bends can be used depends on the designer's judgment based on the specific conditions of the room. The weight ranking is only an auxiliary measure.

[0046] In some implementations, the ranking of bend weights in process piping is determined through a hierarchical screening method. Specifically, the hierarchical screening includes:

[0047] The first step is to calculate the product of the pipe diameter (in inches) and the minimum number of bends in the room, which serves as the primary screening weight. The pipes are then sorted from largest to smallest by the product value. Since the biggest advantage of bends over elbows is the reduction in the number of welds, the larger the product of the pipe diameter and the minimum number of bends, the greater the reduction in welding workload due to the reduction in the number of welds. Therefore, the pipes with the smaller bends are prioritized. For example, if the minimum number of bends for a 10-inch process pipe in a room is 2, while the minimum number of bends for a 6-inch pipe is 4, then 6 × 4 > 10 × 2. This means that the bends of the 6-inch pipe have a greater weight, so the 6-inch pipe is prioritized.

[0048] The second step is to use the pipe grade as the secondary screening weight within the same primary screening weight, and sort the pipe grades from high to low. The higher the pipe grade, the higher the proportion of post-weld non-destructive testing and the more likely it is to require in-service inspection. In other words, the higher the pipe grade, the more important the pipe is and the more it needs to be inspected, and it should be prioritized. For example, if there are multiple pipes of the same diameter in a room and the same number of minimum bends, and these pipes have the same primary screening weight, they should be sorted by pipe grade. Level 1 pipes should be sorted first, and non-nuclear grade pipes should be sorted last. Therefore, Level 1 pipes should be prioritized.

[0049] The third step is to use the minimum bending radius as the tertiary screening weight within the same secondary screening weight, and sort them from smallest to largest according to the minimum bending radius. The smaller the minimum bending radius, the easier it is to arrange the pipe bends, and the priority is given to arranging them. For example, if there are multiple pipes of the same grade and diameter in a room, and the number of minimum bending pipes is the same, and these pipes have the same secondary screening weight, then they are sorted according to the minimum bending radius. The smaller the minimum bending radius, the higher the ranking and the priority is given to arranging them.

[0050] The fourth step involves using wall thickness as the fourth-level screening weight within the same third-level screening weight, and sorting them from largest to smallest wall thickness. The larger the wall thickness, the easier it is to bend the pipe and manufacture it, thus giving it priority in placement. For example, if a room contains multiple pipes of the same grade and diameter, with the same minimum number of bends and the same minimum bending radius, and these pipes have the same third-level screening weight, they are sorted by pipe wall thickness. The thicker the pipe wall, the higher it is in the ranking and the more priority it is in placement.

[0051] In some implementations, step S4, when sorting the bend weights of the process pipelines based on their diameter, wall thickness, grade, minimum bending radius, and number of bends, further includes:

[0052] The weights of process pipeline bends are ranked according to whether they require in-service inspection and whether the bends are at standard angles.

[0053] Accordingly, the hierarchical screening also includes:

[0054] The fifth step involves using the requirement for in-service inspection as the fifth-level screening weight within the same fourth-level screening weight. Pipes that require in-service inspection are sorted from those that do not, with those requiring in-service inspection ranked higher and given priority for deployment.

[0055] The sixth step involves using the standard angle of the bend as the sixth-level screening weight within the same five-level screening weight. Pipes with non-standard bends are sorted from those with non-standard bends to those with standard bends. Pipes with non-standard bends are prioritized for placement as they appear earlier in the sorting.

[0056] Step S5: Based on the weight ranking of bends, prioritize the placement of process pipes with higher bend weights. A higher ranking indicates greater benefits and lower difficulty in bend placement, thus necessitating their use. However, the decision on whether to use bends ultimately depends on the room's layout; the weight ranking is only a supplementary factor. The remaining process pipes with lower rankings (i.e., lower bend weights) are placed using conventional methods.

[0057] The pipe layout method based on bends in this embodiment takes a room as the layout design unit. Based on the design information and inlet / outlet positions of the process pipes, the method comprehensively considers the process pipes in the room. By calculating the bend weights of the process pipes in the room and sorting them, the overall process pipes are prioritized. According to the layout principle that the higher the bend is, the higher the benefit and the less difficult it is, the process pipes with higher priority are prioritized for layout, and bends are given priority in layout. This ensures that the process pipes with higher priority can use bends as much as possible for turning, thereby improving the utilization rate and benefit of bends.

[0058] Example 2

[0059] This embodiment discloses a pipe layout method based on bends. Compared with the method described in Embodiment 1, the difference lies in that the method in this embodiment also includes a modification step for the existing pipe layout, specifically including:

[0060] Step S6: When modifying an existing pipeline layout, based on the weight of bends, process pipelines with higher bend weights are modified first, and bends are modified first. If an object collision occurs after replacing a bend with a bend, the layout of process pipelines with higher weights is kept unchanged, while the layout of process pipelines with lower weights is modified, usually by changing the pipeline direction, to avoid collisions.

[0061] Compared to the method described in Embodiment 1, the pipe layout method based on bends in this embodiment can also modify existing pipe layouts. When modifying existing pipe layouts, priority is given to modifying the layout of process pipes that are ranked higher, and bends are given priority in the layout. This can ensure that process pipes ranked higher can use bends as turns as much as possible, thereby improving the utilization rate and benefits of bends.

[0062] Example 3

[0063] This embodiment discloses a pipe structure based on a bend, which is arranged using the method described in Embodiment 1 or Embodiment 2.

[0064] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A pipe arrangement method based on bends, characterized in that, include: S1, using the room as a piping layout unit, identifies all process piping in the room and extracts process piping information; S2, determine the inlet and outlet locations of each process pipe within the room; S3, Determine the minimum number of bends in the process pipeline based on the inlet and outlet positions of each process pipeline; S4. Based on the pipe diameter, wall thickness, grade, minimum bending radius, and number of bends of each process pipeline, the bend weights of the process pipelines are sorted using a hierarchical screening method. The hierarchical screening includes: Calculate the product of pipe diameter and minimum number of bends, use it as the first-level screening weight, and sort the products from largest to smallest. Within the same primary screening weight, the pipeline level is used as the secondary screening weight, and the pipelines are sorted from high to low. Within the same secondary screening weight, the minimum bending radius is used as the tertiary screening weight, and the samples are sorted from smallest to largest according to the minimum bending radius; Within the same third-level screening weight, wall thickness is used as the fourth-level screening weight, and the screens are sorted from largest to smallest wall thickness. S5. Based on the weight of the bends, process pipes with higher weights are prioritized for placement, and the higher the weight, the more priority is given to using bends for placement.

2. The pipe arrangement method based on bends according to claim 1, characterized in that, When ranking the bend weights of process pipelines based on their diameter, wall thickness, grade, minimum bending radius, and number of bends using a hierarchical screening method, the following also applies: The weights of process pipeline bends are ranked according to whether they require in-service inspection and whether the bends are at standard angles.

3. The pipe arrangement method based on bends according to claim 2, characterized in that, The tiered screening also includes: Within the same four-level screening weight, whether or not an active duty check is required is used as the fifth-level screening weight, and the results are sorted from those that do not require an active duty check to those that do require an active duty check. Within the same five-level filtering weight, whether the turn is at a standard angle is used as the sixth-level filtering weight, and the turns are sorted from those at a standard angle to those at a non-standard angle.

4. The pipe arrangement method based on bends according to any one of claims 1-3, characterized in that, The method also includes a modification step for the existing piping layout, including: S6. Based on the weight of the bends, prioritize modifying the process pipes with higher weights. If an item collision occurs, ensure that the arrangement of the process pipes with higher weights remains unchanged, while modifying the arrangement of the process pipes with lower weights.

5. A pipe structure, characterized in that, The pipeline structure is arranged according to the method described in any one of claims 1-4.

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