A 3D design method for spacecraft piping based on schematic diagram

Abstract

A three-dimensional design method for spacecraft pipelines based on schematic diagram drive, firstly, creates standardized symbols for pipeline products, and then calls the standardized symbols to draw a pipeline schematic diagram in which valve bodies, pipelines and pipeline connectors are interconnected. By parsing the graphical information contained in the pipeline schematic diagram, a product matching table and a pipeline connection relationship table are generated. By using the product matching table and indexing the three-dimensional model library, a three-dimensional model of the valve body and pipeline connector is created, and the layout and assembly of the valve body and pipeline connector, as well as the pipeline direction planning, are completed. By using the pipeline connection relationship table, a three-dimensional connecting pipeline is created between the three-dimensional models corresponding to the two ends of each pipeline, and a pipeline entity model is laid out. Subsequently, after the three-dimensional model design check is passed, a weld entity model is assembled at the port of the pipeline, valve body and pipeline connector, and the pipeline weld number and the valve body polarity information are three-dimensionally annotated. The present invention can significantly improve the efficiency of three-dimensional design of spacecraft pipelines.

Description

Technical Field

[0001] The invention belongs to the field of overall design of spacecraft and relates to a design method for three-dimensional pipelines of a spacecraft. Background Art

[0002] With the increasing use of CNC pipe bending technology in satellite pipeline manufacturing, satellite pipeline three-dimensional digital models are gradually replacing traditional drawings to convey pipeline system production and welding information. The Pro / E-based pipeline module can realize basic pipeline layout and physical design, but due to the complexity of pipeline system design, the overall design efficiency of this method is low. For example, the satellite propulsion system pipeline design will affect important contents such as tanks, thruster layout, and star table layout. It needs to be carried out in advance and the iterative changes are huge. During the whole process, the design of a single-propellant propulsion system requires 30 days and people, and the design of a two-propellant propulsion system requires up to 45 days and people, which is difficult to meet the increasingly tense satellite mission development needs.

[0003] The patent with the publication number CN107729665B and the name of "A Spacecraft Pipeline Three-Dimensional Design System and Method" discloses a spacecraft pipeline three-dimensional design method, which can unify the planning of the spacecraft pipeline three-dimensional design process and improve the efficiency of spacecraft pipeline three-dimensional design. However, it does not discuss the method for generating the required pipeline connection relationship. The designed pipeline verification module can only perform pipeline interference inspection, and fails to provide an effective tool for the connection relationship inspection, both of which are key links in the pipeline three-dimensional design system. Comparing the pipeline schematic diagram to rely on manual writing to manage the connection relationship and relying on manual inspection of the correctness of the pipeline connection relationship not only takes a lot of time, but also the accuracy cannot be guaranteed. Summary of the invention

[0004] The technical problem solved by the present invention is: in view of the problem of low efficiency in pipeline system design in the field of satellite overall design, the present invention proposes a schematic diagram driven three-dimensional rapid design method for spacecraft pipelines. By drawing a standardized schematic diagram, digital analysis of the pipeline schematic diagram and automatic publishing of the pipeline connection relationship are realized. On the one hand, input conditions are provided for the three-dimensional automatic direction design of the pipeline, and on the other hand, automatic inspection of the correctness of the three-dimensional direction connection relationship of the pipeline is realized.

[0005] The technical solution of the present invention is: a three-dimensional design method of spacecraft pipelines based on schematic driving, comprising the following steps:

[0006] (1) Combining product information with graphical symbols to form standardized symbols for pipeline products; the pipeline products include valve bodies, pipelines, and pipeline connectors; the standardized symbols include pipeline product legends and built-in attributes, wherein fixed quantities in the built-in attributes are pre-assigned as constants, and quantities in the built-in attributes that change with the three-dimensional design of the pipeline are pre-assigned as variables;

[0007] (2) calling the standardized symbols to draw a pipeline schematic diagram in which the valve body, the pipeline and the pipeline connecting parts are interconnected;

[0008] (3) Analyze the graphical information contained in the pipeline schematic diagram, assign values ​​to variables, and then generate a product matching table and a pipeline connection relationship table;

[0009] (4) Using the product matching table obtained through analysis, create a three-dimensional model of the valve body and pipeline connecting parts by indexing the three-dimensional model library, and complete the layout and assembly of the valve body and pipeline connecting parts;

[0010] (5) Arrange pipeline control lines or pipeline support components to complete pipeline direction planning;

[0011] (6) According to the pipeline connection relationship table, for each pipeline, a three-dimensional connecting pipeline is created between the corresponding three-dimensional models at both ends of the pipeline, and the pipeline entity model is laid out;

[0012] (7) Conduct 3D model design inspection according to pipeline design requirements;

[0013] (8) Assemble the weld solid model at the end of the pipeline, valve body and pipeline connector;

[0014] (9) Three-dimensional marking of pipeline weld numbers and valve body polarity information.

[0015] Furthermore, the built-in attributes include, for the valve body, model code, model name, port diameter, number of ports, product code and product name; for the pipeline, they include pipeline name, pipeline number, pipeline inlet information, pipeline outlet information; for the pipeline connecting parts, they include connecting part name, connecting part code, connecting part number, number of ports n, connecting port 1 information, connecting port 2 information, ... connecting port n information.

[0016] Furthermore, the constants include, for the valve body, the model code, model name, port diameter, and number of ports; for the pipeline, the pipeline name; and for the pipeline connecting piece, the connecting piece name, connecting piece code, and number of ports n.

[0017] Furthermore, the variables include product code and product name for the valve body, pipeline number, pipeline inlet information, and pipeline outlet information for the pipeline, and connecting piece number and n connecting port information for the pipeline connecting piece.

[0018] Furthermore, the product matching table includes valve bodies, pipes and pipe connecting parts, the valve body contains the product code, product name and the corresponding assembly model code; the pipe product contains the pipe code, pipe number and the corresponding assembly model code; the pipe connecting part product contains the product code, product name, pipe connecting part number and the corresponding assembly model code; wherein the corresponding assembly model code is used for product three-dimensional modeling.

[0019] Furthermore, the pipeline connection relationship table is an analyzed table of the interconnection relationship between the valve body and the pipeline connecting parts in the pipeline schematic diagram, involving three types: pipeline connection between valve bodies, pipeline connection between valve bodies and pipeline connecting parts, and pipeline connection between pipeline connecting parts. Each row of the connection relationship table contains attribute information: pipeline code, pipeline inlet code, pipeline inlet name, inlet model code, pipeline outlet code, pipeline outlet name, outlet model code, pipeline specification and working medium.

[0020] Furthermore, the creation of the three-dimensional connection pipeline is based on the requirement of the shortest connection path.

[0021] Furthermore, the three-dimensional model design check is carried out according to the pipeline design requirements, and the inspection rules include: ① the length of the straight pipe section of the pipeline inlet / outlet is suitable for clamping and welding; ② the spacing between the outer walls of the pipeline meets the thermal control implementation; ③ the bending radius of all pipelines meets the requirements; ④ the three-dimensional model envelopes of the pipeline entity, valve body and pipeline support do not overlap with each other; ⑤ the pipeline connection relationship is correct.

[0022] Furthermore, for the assembly weld entity model, ports at the same position use the same weld entity model.

[0023] Furthermore, the valve body polarity is marked at the center area of ​​the valve body model in the form of a three-dimensional arrow, and the arrow points in the same direction as the flow direction of the propulsion medium in the valve body.

[0024] The advantages of the present invention compared with the prior art are:

[0025] (1) The present invention defines standardized schematic symbols with built-in attribute blocks, which facilitates the rapid and standardized drawing of schematics on the one hand, and provides support for the schematic-driven three-dimensional design of pipelines on the other hand;

[0026] (2) The present invention realizes rapid layout of pipes and valves, automatic three-dimensional pipeline orientation and design inspection by analyzing the schematic diagram, replacing the manual drawing recognition, model conversion and review and reexamination process in the original satellite pipeline system, thereby improving design efficiency and design accuracy;

[0027] (3) The present invention utilizes the product matching spectrum information and product spectrum 3D model library obtained through analysis to automatically match the product spectrum to create a 3D model of the valve body equipment, and can assemble the pipeline products to one or more installation surfaces once or in batches according to the product matching, thereby realizing rapid modeling and layout design of the pipeline products;

[0028] (4) The present invention is oriented to production and manufacturing development, and has the functions of pipeline creation and editing, weld design and parameter setting, material information export, and pipeline 3D annotation, so as to improve the efficiency of pipeline welding information transmission and build a pipeline 3D design system framework from the whole life cycle of pipeline design;

[0029] (5) The bottom layer of the system of the present invention is supported by the three-dimensional pipeline design standards and specifications, which improves the standardization of the three-dimensional pipeline design model. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flowchart of the method of the present invention;

[0031] Figure 2 This is an example of a standardized piping schematic symbol library in an embodiment of the present invention;

[0032] Figure 3 This is an example of a standardized schematic diagram in an embodiment of the present invention;

[0033] Figure 4 This is an example of the schematic diagram analysis in the embodiment of the present invention;

[0034] Figure 5 This is an example of the rapid layout of pipe and valve components in an embodiment of the present invention;

[0035] Figure 6 This is an example of the adaptive pipeline direction design in the embodiment of the present invention;

[0036] Figure 7 This is an example of a pipeline system expert library in an embodiment of the present invention;

[0037] Figure 8 This is an example of a standard system for designing a pipeline three-dimensional model in an embodiment of the present invention;

[0038] Fig. 9 This is an example of the pipeline and weld numbering specification in the embodiment of the present invention. DETAILED DESCRIPTION

[0039] like Figure 1 FIG. 1 is a schematic diagram of a three-dimensional rapid design method for spacecraft pipelines according to the present invention, and the main steps are as follows:

[0040] (1) Combine product information with graphical symbols to form standardized symbols for pipeline products.

[0041] In the present invention, according to the product characteristics, pipeline products are divided into valve bodies, pipelines and pipeline connectors. The valve body legend has built-in model spectrum code, model spectrum name, port diameter, number of ports, product code and product name, a total of 6 attribute modules to form a standardized symbol, wherein the model spectrum code refers to the code defined for general products to meet the needs of adapting to multi-field development and batch production tasks, such as single-group gas addition and exhaust valve type 1, FDV-M4 / 2-1. The pipeline legend has built-in pipeline name, pipeline number, pipeline inlet information (IN), pipeline outlet information (OUT), a total of 4 attribute modules to form a standardized symbol. The pipeline connector legend has built-in connector name, connector code, connector number, number of ports (1, 2, 3, 4...n), connection port 1 information, connection port 2 information,...connection port n information, a total of n+4 attribute modules to form a standardized symbol.

[0042] Product universal attributes: valve body model code, model name, total number of ports, port diameter, pipe name, connector name, connector code, number of ports are preset and written into the product legend. Model attributes such as valve body product code, product name, pipe number, pipe inlet information, pipe outlet information, pipeline connector number, and connection port information are written in the subsequent schematic drawing and analysis. Pipe and pipeline connector numbers are the sequence numbers used for pipes with the same diameter or the same type of pipe connectors. The initial value is 1, and it increases in sequence.

[0043] According to the professional spectrum of piping systems, a standardized symbol library for different professional systems can be established for multiple reuse in schematic drawing.

[0044] (2) Call the standardized symbols to draw a piping schematic diagram in which the valve body, pipelines, and pipeline connectors are interconnected, and the product code and product name are written into the valve body legend attribute module.

[0045] Optional software for schematic drawing is flowchart and schematic drawing software such as Microsoft Visio. First, draw the schematic diagram of the pipeline system from top to bottom according to the pipeline principle, and then set the product code and name for each valve body legend. The legend position is placed according to the principles of clarity and beauty. The same type of pipelines and pipeline connectors are numbered. The first use number is 1, and the subsequent increments are automatically increased by 1. The legend ports of interconnected valve bodies, pipelines, pipeline connectors, etc. are guaranteed to overlap for subsequent analysis of pipeline connection port information.

[0046] (3) Parse the graphical information of the schematic diagram, read the attribute information of the legend products connected to the start and end ends of the pipeline legend in the schematic diagram (such as the valve body product code and product name information), write the built-in pipeline inlet information and pipeline outlet information of the pipeline legend, and generate a pipeline system product matching table and a pipeline connection relationship data table.

[0047] The product matching table in the present invention includes three types of products: valve body, pipeline and pipeline connector. The valve body product includes three attribute columns: product code and name, and the assembly model code. The pipeline product includes three attribute columns: product code, pipeline number and assembly model code. The pipeline connector product includes four attribute columns: connector code, name, number and assembly model code. Among them, the assembly model code is set later for use in product 3D modeling.

[0048] The pipeline connection relationship table in the present invention is an analytical table of the interconnection relationship between the valve body and the pipeline connecting parts in the pipeline schematic diagram, involving three types: pipeline connection between valve bodies, pipeline connection between valve bodies and pipeline connecting parts, and pipeline connection between pipeline connecting parts. Each row of the connection relationship table contains attribute information: pipeline code, pipeline inlet code, pipeline inlet name, inlet model code, pipeline outlet code, pipeline outlet name, outlet model code, pipeline specification (unit: mm) and working medium (oxygen, fuel or methylhydrazine), which is used to generate pipeline connections and pipeline connection relationship checks, wherein the pipeline codes are numbered in sequence according to the naming rule template.

[0049] (4) Using the product matching table obtained through analysis, create a three-dimensional model of the valve body and pipeline connecting parts by indexing the product spectrum matching.

[0050] The three-dimensional model is generated according to the following naming rules: the three-dimensional model code and name are configured according to the product code and name in the product matching table. If the same code is installed multiple times, such as pipeline connectors, the product code is followed by the coding number to ensure that the product matching table and the three-dimensional model correspond one to one.

[0051] If a 3D model library of spectral products has been established, the 3D models of valve bodies and pipe connectors of corresponding products can be automatically established based on the product matching table and 3D templates.

[0052] (5) According to the pipeline product layout and pipeline three-dimensional model system design, complete the layout and assembly of the valve body and pipeline connecting parts.

[0053] First, configure the assembly models of pipeline products such as valve bodies and pipeline connectors, write the corresponding model codes into the corresponding attribute columns of the product matching table, and then assemble the three-dimensional models of valve bodies and pipeline connectors to the assembly models of the pipeline system according to the layout design.

[0054] Pipeline products are divided into one or more groups according to the number of assembly models. The layout can be selected manually or in a dispersed layout with a certain spacing according to the pipeline flow relationship. For example, 30 pipeline products can be installed on one deck at a time, or 20 can be installed on board A and 10 on board B.

[0055] (6) In the pipeline system installation layout area, arrange pipeline control lines or pipeline support components to complete pipeline route planning.

[0056] The pipeline direction planning in the present invention is completed by arranging pipeline control lines and pipeline support components.

[0057] First, a quick direct connection path is established between the pipeline inlet and outlet, and then along this path, the pipeline layout area such as the cabin plate and the shell is projected to add pipeline control lines or pipeline support components as control points according to the fixed pipeline spacing requirements (generally not more than 300mm) to complete the pipeline direction planning.

[0058] The pipeline control line is a virtual straight line feature with a specific length (its length is consistent with the length of the pipeline fixing clamp, generally 10mm), parallel to the installation plate surface, and the position of one end point of the straight line feature or the midpoint of the straight line relative to the installation cabin layout coordinate system is a parameterized setting.

[0059] The pipe support assembly consists of a pipe clamp and a clamp bracket. The clamp fixes the pipe to the clamp bracket. The clamp bracket is used to connect and fix the pipe product to the pipe system mounting plate. Similar to the pipe control line, the axis of the pipe support assembly clamp is parallel to the mounting plate surface and the position of its clamp end point or midpoint relative to the mounting cabin layout coordinate system is a parameterized setting.

[0060] Using the pipeline control line to plan and adjust the pipeline direction is convenient and takes up little memory. The pipeline bracket model can be assembled in place in the way that the center of the clamp is aligned with the control line. It is more direct to use the pipeline bracket assembly to plan the path. The two can be selected according to the scale and design level of the pipeline system.

[0061] (7) According to the pipeline connection relationship data table, create a three-dimensional connection pipeline and pipeline entity model between the three-dimensional models corresponding to the inlet and outlet model codes.

[0062] First, the pipeline inlet / outlet 3D model check is performed on the pipeline connection relationship digitized table to ensure that the pipeline inlet / outlet has a corresponding 3D model; then, a 3D pipeline is created between each pipeline inlet model and outlet model in accordance with the requirements of passing through the pipeline control line / pipeline support assembly and the shortest connection path; finally, a 3D pipeline model is created based on the pipeline specifications and working medium parameter attribute requirements in the connection relationship digitized table.

[0063] (8) Conduct 3D model design inspection according to pipeline design requirements.

[0064] The inspection rules in the present invention are defined as:

[0065] ① The length of the straight pipe section at the pipeline inlet / outlet is suitable for clamping and welding (such as the straight section length is not less than 20mm); ② The distance between the outer walls of the pipeline meets the requirements for thermal control implementation (such as the distance between the outer walls of the pipeline is not less than 6mm); ③ The bending radius of all pipelines meets the requirements (such as the bending radius is 4 times the outer diameter of the pipeline); ④ The envelopes of the three-dimensional models of the pipeline entity, valve body and pipeline support do not overlap with each other; ⑤ The pipeline connection relationship is correct: the pipeline inlet / inlet code in the pipeline connection relationship table is consistent with the pipeline inlet / inlet three-dimensional model code.

[0066] (9) Assemble the weld solid model at the port of the pipeline, valve body and pipe fittings, and use the same weld model for ports in the same position.

[0067] The weld model in the present invention uses a cylindrical model with an arrow. A Cartesian coordinate system is set at the center of the cylindrical model. The Z direction is along the axial direction of the cylinder. The coordinate system is assembled and overlapped with the pipeline / valve body / pipe pass port coordinate system. The direction of the arrow represents the flow direction of the pipeline medium in the product.

[0068] (10) Output the pipe length and weld information in list form.

[0069] In the present invention, the pipeline length list includes three attribute columns: pipeline code, pipeline length and pipeline type. The pipeline type includes straight pipe and curved pipe. The weld information list includes three attribute columns: weld number, welding start and end information. The weld information is obtained by reading the weld center point and aligning it with the valve body, pipeline connector or pipeline model code at the port.

[0070] (11) Three-dimensional marking of pipeline weld numbers and valve body polarity information.

[0071] The present invention marks the weld sequence number at the center of the weld model, and the valve body polarity is marked at the center area of ​​the valve body model in the form of a three-dimensional arrow, and the arrow points in the same direction as the flow direction of the propulsion medium in the valve body.

[0072] Example

[0073] The above method and design system were applied to carry out the three-dimensional design of a satellite pipeline.

[0074] The first step is to check and draw the standardized schematic diagram. The graphic symbols used in the schematic diagram in this embodiment include valve body symbols, pipeline symbols and pipeline intersection symbols. The preset attribute definitions of various graphic symbols (such as Figure 2 As shown in the figure), it corresponds to the monopropellant propulsion system type spectrum product one by one, and the standardized schematic diagram drawn using standardized symbols is shown in the figure Figure 3 shown.

[0075] Then, the graphical information in the standardized schematic diagram is read through schematic diagram analysis. This embodiment uses C++ language secondary development to convert the logical relationship between pipe valves into an extensible markup language file (XML file), such as Figure 4shown.

[0076] Next, according to the pipeline system product matching and model spectrum, the filter assembly, exhaust valve assembly, pressure transmission assembly, thruster assembly and self-locking valve assembly in the pipeline system expert library are called in turn to quickly model and layout the pipe and valve components, such as Figure 5 shown.

[0077] Then use the pipeline intelligent direction design module to design the three-dimensional direction of the pipeline, and proceed in sequence: ① Prepare the three-dimensional model of the valve body equipment and check the pipeline connection relationship. In the software system, check whether the three-dimensional model required by the pipeline system is missing by comparing it with the schematic product matching. ② Quickly connect and adjust the pipeline path: automatically match the starting and ending ends of the pipeline according to the analyzed connection relationship of the pipe and valve parts, select the pipeline bracket as the direction control point, and fine-tune the bending angle to complete the pipeline path connection. Figure 6 shown.

[0078] Next, create and edit the pipeline, generate the pipeline entity according to the pipeline path, pipeline definition and pipeline connection relationship, and support pipeline color setting and quick interruption and generation of tank / gas cylinder outlet pipes.

[0079] Then, the pipeline design is checked. The pipeline design parameters are accessed through program traversal, and the algorithm is run to analyze and determine whether it meets the production standards. The pipeline connection correctness check, pipeline welding straight section length check, pipeline spacing calculation statistics and X-ray orthogonal two-way radiography inspection are completed in sequence.

[0080] Finally, weld design and parameter setting, material information editing and export, and pipeline 3D annotation are performed.

[0081] The pipeline system expert library based on the system includes three types of databases required for the layout design of spacecraft pipelines: the pipe valve library, the pipeline connecting parts library, and the pipeline bracket library (such as Figure 7 The underlying specifications supported by the system include three categories: pipeline system model system specifications and pipeline product naming specifications. The model system specifications are used to standardize the generated spacecraft pipeline three-dimensional model system (such as Figure 8 ), such as valve body layout model, pipeline support, connector, pipeline design model, etc. are arranged in parallel in the overall model, where the pipeline model and weld model are arranged as follows Fig. 9 The rule number shown.

[0082] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A three-dimensional design method for spacecraft pipelines based on schematic diagram drive, characterized in that The steps include: (1) Combining product information with graphical symbols to form standardized symbols for pipeline products; the pipeline products include valve bodies, pipes, and pipeline connectors; the standardized symbols include pipeline product legends and built-in attributes, fixed quantities in the built-in attributes are pre-assigned as constants, and quantities in the built-in attributes that change with the three-dimensional design of the pipeline are pre-assigned as variables; (2) calling the standardized symbols to draw a pipeline schematic diagram in which the valve body, pipelines and pipeline connecting parts are interconnected; (3) Analyze the graphical information contained in the pipeline schematic diagram, assign values ​​to variables, and then generate a product matching table and a pipeline connection relationship table; (4) Using the product matching table obtained through analysis, create a three-dimensional model of the valve body and pipeline connecting parts by indexing the three-dimensional model library, and complete the layout and assembly of the valve body and pipeline connecting parts; (5) Arrange pipeline control lines or pipeline support components to complete pipeline route planning; (6) According to the pipeline connection relationship table, for each pipeline, create a 3D connecting pipeline between the corresponding 3D models at both ends, and lay out the pipeline entity model; (7) Conduct 3D model design inspection according to pipeline design requirements; (8) Assemble the solid model of the welds at the ports of the pipeline, valve body and pipeline connectors; (9) Three-dimensional marking of pipeline weld numbers and valve body polarity information; The built-in attributes include, for valve bodies, model code, model name, port diameter, number of ports, product code and product name; for pipelines, include pipeline name, pipeline number, pipeline inlet information, pipeline outlet information; for pipeline connectors, include connector name, connector code, connector number, number of ports n, and information of connected ports 1-n; The pipeline connection relationship table is a parsed table of the interconnection relationship between the valve body and the pipeline connecting parts in the pipeline schematic diagram, involving three types: pipeline connection between valve bodies, pipeline connection between valve bodies and pipeline connecting parts, and pipeline connection between pipeline connecting parts. Each row of the connection relationship table contains attribute information: pipeline code, pipeline inlet code, pipeline inlet name, inlet model code, pipeline outlet code, pipeline outlet name, outlet model code, pipeline specification and working medium; The three-dimensional model design check is carried out according to the pipeline design requirements, and the inspection rules include: ① the length of the straight pipe section of the pipeline inlet / outlet is suitable for clamping and welding; ② the spacing between the outer walls of the pipeline meets the thermal control implementation; ③ the bending radius of all pipelines meets the requirements; ④ the three-dimensional model envelopes of the pipeline entity, valve body and pipeline support do not overlap with each other; ⑤ the pipeline connection relationship is correct.

2. The method for three-dimensional design of spacecraft pipelines based on schematic diagram drive according to claim 1, characterized in that: The constants include, for the valve body, the model code, model name, port diameter, and number of ports; for the pipeline, the pipeline name; and for the pipeline connecting piece, the connecting piece name, connecting piece code, and number of ports n.

3. The method for three-dimensional design of spacecraft pipelines based on schematic diagram drive according to claim 1, characterized in that: The variables include, for valve bodies, product codes and product names; for pipelines, pipeline numbers, pipeline inlet information, and pipeline outlet information; and for pipeline connectors, connector numbers and n number of connecting port information.

4. The method for three-dimensional design of spacecraft pipelines based on schematic diagram drive according to claim 1, characterized in that: The product matching table includes valve bodies, pipelines and pipeline connecting parts. The valve bodies include product codes, product names and corresponding assembly model codes; pipeline products include pipeline codes, pipeline numbers and corresponding assembly model codes; pipeline connecting parts products include product codes, product names, pipeline connecting parts numbers and corresponding assembly model codes; The assembly model code is used for product 3D modeling.

5. The method for three-dimensional design of spacecraft pipelines based on schematic diagram drive according to claim 1, characterized in that: The creation of the three-dimensional connection pipeline is based on the requirement of the shortest connection path.

6. The method for three-dimensional design of spacecraft pipelines based on schematic diagram drive according to claim 1, characterized in that: The assembly weld entity model uses the same weld entity model for ports at the same position.

7. The method for three-dimensional design of spacecraft pipelines based on schematic diagram drive according to claim 1, characterized in that: The valve body polarity is marked at the center area of ​​the valve body model in the form of a three-dimensional arrow, and the arrow points in the same direction as the flow direction of the propulsion medium in the valve body.

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