A Modeling Method for Ship Double-Wall Pipe Fittings in SPD Systems

Abstract

This invention relates to the field of double-walled pipe modeling technology and discloses a method for modeling ship double-walled pipe fittings for SPD systems, including the following steps: S1: Model the double-walled pipe end cap as a pipe wall fitting and place it in a sample library; S2: Add the connection point information of the inner and outer pipes of the double-walled pipe to the end cap; only one sample needs to be built for pipes of the same diameter; S3: When modeling the double-walled pipe, model the inner and outer pipes as normal piping systems and add accessories. This invention realizes the direct modeling of double-walled pipes using SPD through the exploration of new applications of SPD software, and efficiently realizes the functions of double-walled pipe modeling, drawing, and material statistics. It saves the design cycle for existing ship types of double-walled pipe modeling, drawing, and material requisition statistics, and provides technical support for the design of ships with double-walled pipes in the future.

Description

Technical Field

[0001] This invention relates to the field of dual-tube modeling technology, specifically to a method for modeling ship dual-wall pipe components for SPD systems. Background Technology

[0002] The ShipProductDesign (SPD) system is a 3D CAD graphics platform developed based on OpenGL with independent intellectual property rights. It has functions such as hull structure design, piping system design, duct design, electrical design, iron outfitting design, and painting production design.

[0003] Because the main ship types currently used in our plant, the 17,000T and 37,000T asphalt tankers, all use double-walled pipes in their cargo tanks, but the SPD software cannot model double-walled pipes, even after repeated communication with the SPD software company, no good solution has been found. We can only implement the double-walled pipe model by building a protective sleeve, as suggested by the SPD software company, but this does not solve the problems of modeling time, drawing output, and material statistics. This has a significant impact on the modeling, drawing output, and material statistics of the cargo tank double-walled pipes. The design work for the 17,000T asphalt tanker's cargo tank double-walled pipes alone has increased the workload by about two months compared to normal piping design. The design workload for the subsequent 37,000T asphalt tankers and the LNG and LPG vessels that may be built later, involving double-walled pipes, will be even greater.

[0004] The main problems in modeling double-walled tubes using protective sleeves are:

[0005] 1. When encountering double-walled pipes, only one protective sleeve template of the corresponding length to the straight pipe can be created. This template is then attached to the pipe by inserting the protective sleeve. New protective sleeves are required for different pipe diameters and lengths before inserting into the model. If pipe adjustments are needed, the protective sleeve must be rebuilt (see...). Figure 1 The design workload increased exponentially.

[0006] 2. When modeling using the protective sleeve method, errors frequently occur and cannot be resolved when generating pipe part drawings, requiring deletion and re-creation to potentially fix the issue.

[0007] 3. The software cannot extract pipe end sealing plate and pipe connection information for heating medium at both ends; data such as cutting and material requisition can only be calculated manually.

[0008] 4. The generated pipe part drawing lacks pipe end caps and heating medium connection information. You need to manually add the cap and branch pipe information to the part drawing (see...). Figure 2 This can easily lead to a lack of information;

[0009] 5. It is impossible to install brackets on the protective sleeve. When it is necessary to add brackets to the pipeline, a dummy pipe must be added first, and then the bracket must be added. After the bracket is added, the dummy pipe must be removed (and many connection point errors will appear during the later connection point inspection). Summary of the Invention

[0010] The purpose of this invention is to provide a method for modeling ship double-walled pipe fittings for SPD systems, so as to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a method for modeling ship double-walled pipe fittings for SPD systems, comprising the following steps:

[0012] S1: Model the end cap of the double-walled pipe as a pipe wall component and put it into the sample library;

[0013] S2: Add the connection point information of the inner and outer pipes of the double-walled pipe to the pipe end sealing plate. Only one small sample needs to be built for pipes of the same diameter.

[0014] S3: When modeling double-walled pipes, model the inner and outer pipes as normal piping systems and add attachments;

[0015] S4: For the pipe sections where double-walled pipes are required to be made, add double-walled pipe end sealing plate samples to both ends;

[0016] S5: Select the outer tube model and connect the two tube end sealing plates;

[0017] S6: Insert the outer pipe into the media connectors at both ends in the form of a branch pipe;

[0018] S7: Add pipe supports to double-walled pipes.

[0019] Preferably, in S1, the pipe end sealing plate is inserted into the inner pipe of the double-walled pipe in the form of a pipe wall component, and the outer pipe is connected through the connection point on the pipe end sealing plate.

[0020] Preferably, branch pipes and threaded seat accessories can be added normally to the outer pipe of S5.

[0021] Preferably, in S1-S7, the SPD software and SmartDP module can extract model information normally and accurately.

[0022] Preferably, the end cap of the double-walled pipe is constructed by taking the origin of the reference coordinates as the starting point and combining the dimensional constraints and topological relationships.

[0023] Preferably, in S2, the connection point information of the inner and outer tubes includes: form code, wall thickness grade, solid generation code, pressure, angle, and connection point data.

[0024] Preferably, the connection point data includes: connection type, connector length, pipe outer diameter, and wall thickness.

[0025] Preferably, in S3, the following steps are included when modeling the inner and outer tubes:

[0026] S31: Pipe data acquisition;

[0027] S32: Pipe standard data input;

[0028] S33: Automatically create 3D solids;

[0029] S34: Establish shipbuilding engineering and catalogs;

[0030] S35: 3D solid interaction design, coordinate positioning surface, principle data definition, and creation of new drawing files;

[0031] S36: Add ship hull background and activate pipe model;

[0032] S37: Modification of piping layout;

[0033] S38: Generate pipe model;

[0034] S39: Pipe model inspection.

[0035] Preferably, in S39, the pipe model inspection includes: blanking and interference detection, connection point inspection, and process inspection.

[0036] Preferably, in step S39, if a problem is found during the pipe model check, the process returns to step S37 to modify the pipe layout until the check in step S39 is normal.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] This invention explores new applications of SPD software to achieve direct modeling of double-walled pipes using SPD. It efficiently realizes the functions of double-walled pipe modeling, drawing, and material statistics. It enables the modeling, drawing, and material procurement statistics of double-walled pipes in the cargo holds of existing 37,000-ton asphalt tankers. Compared with 17,000-ton asphalt tankers, it can save two months of design cycle. At the same time, it provides technical support for the design of subsequent LNG, LPG, and other ships with double-walled pipes. Attached Figure Description

[0039] Figure 1 This is a model diagram of a traditional double-walled tube protective sleeve for SPD systems according to the present invention;

[0040] Figure 2 This is a drawing of a double-walled tube component, a traditional protective sleeve for SPD systems, according to the present invention.

[0041] Figure 3 This is a schematic diagram of the pipe end sealing plate structure of a method for modeling ship double-walled pipe fittings for SPD systems according to the present invention;

[0042] Figure 4 This is a double-walled pipe model diagram of a method for modeling ship double-walled pipe fittings for SPD systems according to the present invention.

[0043] Figure 5 This is a drawing of a double-walled pipe component from a method for modeling marine double-walled pipe components for an SPD system according to the present invention.

[0044] Figure 6 This is a flowchart of a method for modeling ship double-walled pipe fittings for SPD systems according to the present invention;

[0045] Figure 7 This is a flowchart illustrating the inner and outer pipe modeling process of a method for modeling double-walled pipe fittings in a ship using an SPD system, as described in this invention.

[0046] In the diagram: 1-Welding flange; 2-Elbow; 3-Inner pipe; 4-Plug; 5-Outer pipe; 6-Pipe end cap. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Please see Figures 1-7 This invention provides a technical solution: a method for modeling ship double-walled pipe fittings for SPD systems, comprising the following steps:

[0049] S1: Model the end cap of the double-walled pipe as a pipe wall component and place it in the sample library; insert the end cap into the inner pipe of the double-walled pipe as a pipe wall component, and connect the outer pipe through the connection point on the end cap;

[0050] S2: Add information on the inner and outer pipe connection points of double-walled pipes to the pipe end cap; only one prototype needs to be built for pipes of the same diameter. Figure 3 As shown, Figure 3 This is a schematic diagram of the pipe end sealing plate structure;

[0051] The connection point information for the inner and outer pipes includes: type code, wall thickness grade, entity generation code, pressure, angle, and connection point data; the connection point data includes: connection type, connector length, pipe outer diameter, and wall thickness.

[0052] S3: When modeling double-walled pipes, model the inner and outer pipes as normal piping systems and add attachments;

[0053] S4: For the pipe sections where double-walled pipes are required to be made, add double-walled pipe end sealing plate samples to both ends;

[0054] S5: Select the outer pipe model and connect the two pipe end sealing plates; branch pipes and threaded seat accessories can be added normally to the outer pipe;

[0055] S6: Insert the outer pipe into the media connectors at both ends as a branch pipe; after the outer pipe is added, the pipe part drawing can be generated normally, and the information is complete.

[0056] S7: Add pipe supports to double-walled pipes.

[0057] In S1-S7, the SPD software and SmartDP module can accurately extract model information, ensuring the accuracy and comprehensiveness of the pallet table and material statistics. This ensures that newly built double-walled pipes exhibit the same characteristics as normal piping in SPD, allowing for the normal addition of supports, elbows, etc.

[0058] Starting from the origin of the reference coordinate system, and combining dimensional constraints and topological relationships, a pipe end cap is constructed for the double-walled pipe.

[0059] The main achievements are as follows:

[0060] 1. It changes the previous model where the outer pipe of the double-walled pipe could only be modeled as a protective sleeve. Taking the modeling of a single protective sleeve of a 17,000-ton asphalt ship as an example: it usually takes 15 minutes to model and add small sample information. The whole ship needs to model about 355 pipes, which can directly save 89 hours of time.

[0061] 2. The drawing of the double-arm pipe parts can be generated as a normal pipe parts drawing; there is no need to manually add pipe end caps and medium interface branch pipe information (see attached). Figure 6 For example, taking the parts drawing of a 17,000-ton asphalt ship: it usually takes 10 minutes to complete the above information for a single part drawing. With 670 double-walled pipes in the whole ship, it can directly save 112 hours of time.

[0062] 3. The materials for the outer pipe, pipe end sealing plate, and outer pipe branch pipe of the double-walled pipe can be directly extracted and statistically analyzed by software, just like those for normal pipes (see attached). Figure 7 This saves time that would otherwise be spent manually compiling statistics on the materials for the outer pipe sealing plate and branch pipe. For example, for a 17,000-ton asphalt ship, it would take one person 7 days to compile, summarize, and calculate the data, which would take 56 hours.

[0063] 4. Double-walled pipes can be modeled and adjusted just like normal pipes. Modelers have more flexibility in adjusting the piping system and do not need to worry about having to rebuild the outer pipe model after adjusting the pipe. Taking a 17,000-ton asphalt ship as an example: due to the need for model adjustment, the double-walled pipe adjustment takes an additional 80 hours.

[0064] 5. Completely solved the problem of errors that could not be handled when generating part drawings and inserting parts using the original protective sleeve form of the outer tube;

[0065] 6. Normal addition of pipeline supports. Taking a 17,000-ton asphalt ship as an example: a single support is added by adding a dummy pipe. After adding the dummy pipe, the connection point information is deleted and cleared. This usually takes 6 to 7 minutes. For 1,150 double-wall pipe supports, more than 120 hours can be saved directly.

[0066] Please refer to the following: Figure 7 In S3, the following steps are included when modeling the inner and outer pipes:

[0067] S31: Pipe data acquisition;

[0068] S32: Pipe Standard Data Input; The piping component standard data module mainly provides users with input of standard data for pipes, fittings, connectors, and valves, and allows maintenance (modification, deletion, etc.) of the input data. Standard data can be created by directly entering the component name or by searching for existing component data, copying it, and then entering a new component name. Alternatively, existing component names can be searched for and their data modified.

[0069] S33: Automatically create 3D solids; Automatic component generation is the basic module of SPD. It provides the function of converting different component entity data from standard data input into the component entity library for use in piping system design.

[0070] S34: Establish Ship Engineering and Catalog; Engineering and Model Management is a functional module for users to create specific ship engineering project catalog files. Through this function, users can create ship engineering catalogs, define ship type data, and create design drawing interfaces, etc.

[0071] S35: 3D solid interactive design, coordinate positioning surface, principle data definition, new drawing file creation; 3D interactive design, also known as data management, is divided into component data management and pipe data management. The function of pipe data management is for the user to input the attribute data of the pipe; the function of component data management is for the user to input the attribute data of the component and construct the 3D solid shape of the component.

[0072] Coordinate positioning surfaces are a set of "reference points" defined for the ship's coordinate system, used to determine coordinate positions. For example, FR32 indicates a transverse section, and DK1 indicates the deck. With these reference points, in subsequent design work, FR32+300 can represent the position 1300 degrees bow-to-the-horse relative to rib #32, and DK1-200 can represent the position 200 degrees downward relative to the deck, facilitating ship design positioning. They can also be used to draw positioning lines on drawings or to annotate positioning coordinates.

[0073] The schematic design module is the initial step in the SPD piping system design process. Its main functions include: defining piping, defining equipment, defining valves, merging piping schematics, creating a schematic list, modifying piping attributes, and editing valves.

[0074] The drawing management system provides designers with a drawing interface, primarily used to save all drawings generated from the design process, such as design drawings, installation drawings, and component drawings.

[0075] S36: Add hull background and activate pipe model; Model management provides designers with buttons to call up specific disciplines and add models designed in other disciplines to the design drawings for reference. For example, pipe designers can call up models from other disciplines such as hull, duct, and electrical systems, or different models from the same discipline can also call each other.

[0076] S37: Piping Layout Modification; After the design drawings and model are created, designers can use the equipment layout module to arrange and modify the ship's equipment. The main functions of the equipment layout module are: equipment placement, equipment modification, equipment deletion, and equipment trays. Using the piping layout module, designers can arrange and modify the ship's piping. The main functions of the piping layout module are: drawing piping, modifying nodes, modifying identical piping, modifying piping, modifying multiple piping, and deleting piping.

[0077] S38: Generate pipe model;

[0078] S39: Pipe Model Inspection. Pipe model inspection includes: hidden line removal and interference detection, connection point inspection, and process inspection. Before generating part drawings and statistical reports, designers need to use the query and inspection module to inspect the model. The query and inspection module has 14 buttons, in order: Query Model Data, Regenerate View Graphics, Delete Invalid Graphics, Check Incorrect Connection Information, Output 3D Walkthrough Data, Check Out-of-Range Models, Query and Check Part Data, Check Part Name and Part Number Consistency, Change Model Principle Number (Restore Model Principle Number after Principle Library Changes), Update Model After Principle Modification, Check Replica Plate, Update Solid Graphics, Add Solid Snap Point Operation, and Check the Consistency of Pipe Part Materials.

[0079] If a problem is found during the pipe model check in step S39, return to step S37 to modify the pipe layout until the check in step S39 is normal.

[0080] This invention explores new applications of SPD software to achieve direct modeling of double-walled pipes using SPD. It efficiently realizes double-walled pipe modeling, drawing generation, and material procurement statistics functions. This enables modeling, drawing generation, and material requisition statistics for double-walled pipes in the cargo holds of existing 37,000-ton asphalt tankers, saving two months of design time compared to 17,000-ton asphalt tankers. It also provides technical support for the design of subsequent LNG and LPG vessels with double-walled pipes. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

Claims

1. A method for modeling a marine double-wall pipe fitting for an SPD system, the method comprising: Includes the following steps: S1: Model the end cap of the double-walled pipe as a pipe wall component and put it into the sample library; S2: Add the connection point information of the inner and outer pipes of the double-walled pipe to the pipe end sealing plate. Only one small sample needs to be built for pipes of the same diameter. S3: When modeling double-walled pipes, model the inner and outer pipes as normal piping systems and add attachments; S4: For the pipe sections where double-walled pipes are required to be made, add double-walled pipe end sealing plate samples to both ends; S5: Select the outer tube model and connect the two tube end sealing plates; S6: Insert the outer pipe into the media connectors at both ends in the form of a branch pipe; S7: Add pipe supports to double-walled pipes.

2. A method of modeling a marine double-wall pipe for an SPD system according to claim 1, characterized in that: The S1 pipe end sealing plate is inserted into the inner pipe of the double-walled pipe in the form of a pipe wall fitting, and the outer pipe is connected through the connection point on the pipe end sealing plate.

3. A method of modeling a marine double-wall pipe for an SPD system according to claim 1, characterized in that: Branch pipes and threaded fittings can be added normally to the outer pipe of the S5.

4. The method of claim 1, wherein: In S1-S7, the SPD software and Smart DP module can extract model information normally and accurately.

5. The method of claim 1, wherein: Starting from the origin of the reference coordinate system, and combining dimensional constraints and topological relationships, a pipe end cap is constructed for the double-walled pipe.

6. The method of claim 1, wherein: In S2, the connection point information for the inner and outer tubes includes: form code, wall thickness grade, entity generation code, pressure, angle, and connection point data.

7. A method of modeling a marine double-wall pipe for an SPD system according to claim 6, wherein: The connection point data includes: connection type, connector length, pipe outer diameter, and wall thickness.

8. The method of claim 1, wherein: In S3, the following steps are included when modeling the inner and outer pipes: S31: Pipe data acquisition; S32: Pipe standard data input; S33: Automatically create 3D solids; S34: Establish shipbuilding engineering and catalogs; S35: 3D solid interaction design, coordinate positioning surface, principle data definition, and creation of new drawing files; S36: Add ship hull background and activate pipe model; S37: Modification of piping layout; S38: Generate pipe model; S39: Pipe model inspection.

9. A method of modeling a marine double-wall pipe for an SPD system according to claim 8, characterized in that: In S39, the pipe model inspection includes: blanking and interference detection, connection point inspection, and process inspection.

10. A method of modeling a marine double-wall pipe for an SPD system according to claim 8, wherein: If a problem is found during the pipe model check in step S39, return to step S37 to modify the pipe layout until the check in step S39 is normal.

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