BIM Cable Tray Selection Method Based on Cable Identification

Abstract

This invention discloses a BIM cable tray selection method based on cable identification, comprising the following steps: 1. Importing information on all cables; 2. Importing information on all cable trays; 3. Calculating the upper limit of the cross-sectional area for cable arrangement in each cable tray; 4. Analyzing the connection relationships of the cable BIM models for which cable tray selection is required, obtaining the corresponding cross-sectional area information, and forming a cable data set SCable for the cable BIM model; 5. Analyzing the cable tray segment paths of cables in the same row based on the cable data set SCable, and matching each segment with the upper limit of the cross-sectional area of ​​all cable trays, selecting all cable trays that meet the requirements, forming a cable tray data set STray for the cable tray segment paths, and generating the corresponding BIM models of all cable trays. This invention, through computer-aided technology, can effectively utilize the cable information in the BIM model, providing designers with the most reasonable cable tray selection method and significantly improving design efficiency.

Description

Technical Field

[0001] This invention relates to the field of computer-aided design technology, and in particular to a BIM cable tray selection method based on cable identification. Background Technology

[0002] In electrical design, the routing network design of cables, wires, cable trays, and cable ducts accounts for a major portion of the workload. Along with equipment selection, it is one of the two key projects in the professional design and also reflects the path of the electrical system during actual construction. Cables and wires are usually protected by cable trays and cable ducts and arranged inside them. Therefore, the carriers for the design and construction of these lines are mainly cable trays and cable ducts.

[0003] With the development of the times, project construction has placed higher demands on the design of cable trays, which occupy the most space in electrical engineering. With the application of BIM (Building Information Modeling) technology, electrical design has gradually shifted to three-dimensional design, which is closely related to other disciplines such as water supply and drainage, fire protection, and HVAC in equipment installation engineering. However, the process of upgrading from two-dimensional to three-dimensional design in various installation disciplines has also brought about many pipeline integration and space collision problems.

[0004] Therefore, how to select the smallest cable tray size while meeting cable layout design requirements, reduce more pipeline integration and collision problems, and significantly reduce construction material costs has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the present invention provides a BIM cable tray selection method based on cable identification. The purpose is to effectively utilize the cable information in the BIM model through computer-aided technology, provide designers with the most reasonable cable tray options, and significantly improve design efficiency.

[0006] To achieve the above objectives, this invention discloses a BIM cable tray selection method based on cable identification, comprising the following steps:

[0007] Step 1: Import all cable information into the BIM software environment, including the model specifications, approximate outer diameter, and approximate cross-sectional area of ​​each cable.

[0008] Step 2: Import all cable tray information into the BIM software environment, including the material type, size specifications, and design cross-sectional area coefficient of each cable tray;

[0009] Step 3: Based on the dimensions and design cross-sectional area coefficient of each cable tray, calculate the upper limit of the cross-sectional area of ​​the cable that can be laid out to match the corresponding material type;

[0010] Step 4: In the BIM software environment, analyze the connection relationships of the cable BIM models for which cable tray selection is required, and match the cable material table of the cable BIM models to obtain the corresponding cross-sectional area information, forming the cable data set SCable = {Cable1, Cable2, Cable3…Cable…} of the cable BIM models. n};

[0011] Step 5: Analyze the cable tray segment path of the same row of cables according to the cable data set SCable, and match each segment with the upper limit of the cross-sectional area of ​​all the cable trays. Select all the cable trays that meet the requirements to form the cable tray segment path data set STray, and generate the corresponding BIM models of all cable trays according to the cable tray data set STray.

[0012] STray={Tray1, Tray2, Tray3…Tray m}

[0013] Preferably, step 1 includes the following steps:

[0014] Step 1.1: Parse the model and specifications of all the cables. Specifically, according to the electrical cable naming rules, parse the model and specifications in the information of each cable, and modify any inconsistent symbols or expressions to make them consistent.

[0015] Step 1.2: Analyze the approximate outer diameter of all the cables. Specifically, analyze the approximate outer diameter information of each cable. If there are any missing values, automatically calculate and fill them in using the approximate cross-sectional area of ​​the cable.

[0016] Step 1.3: Analyze the approximate cross-sectional area of ​​all the cables. Specifically, analyze the approximate cross-sectional area information of each cable. If there are any missing information, automatically calculate and complete the information using the approximate outer diameter of the cable.

[0017] Preferably, step 2 includes the following steps:

[0018] Step 2.1: Analyze the model and specifications of all the cable trays. Specifically, according to the naming rules for cable trays in the electrical profession, analyze the material type in the information of each cable tray and modify the inconsistent expression methods to make them consistent.

[0019] Step 2.2: Analyze the dimensions and specifications of all the cable trays, specifically: analyze the dimensions and specifications of each cable tray, including the width and height of the cable tray cross-section, and modify any inconsistent symbols or expressions to make them consistent.

[0020] Step 2.3: Analyze the design cross-sectional area coefficient of all the cable trays, specifically: analyze the required design cross-sectional area coefficient value in the information of each cable tray.

[0021] Preferably, in step 4, the cable BIM model includes various functional types of pipelines, including wires and signals.

[0022] Preferably, in step 5, the cable tray includes various types of protective pipelines, including cable trays and busbars.

[0023] The beneficial effects of this invention are:

[0024] The application of this invention can effectively improve the design quality of electrical engineering, significantly reduce the volume occupied by its installation space, reduce collisions and conflicts with other installation disciplines, reduce rework rates, significantly improve design and construction efficiency, and save material costs.

[0025] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0026] Figure 1 The following is a flowchart illustrating the execution of an embodiment of the present invention. Detailed Implementation

[0027] Example 1

[0028] like Figure 1 As shown, the BIM-based cable tray selection method based on cable identification includes the following steps:

[0029] Step 1: Import all cable information into the BIM software environment, including the model, specifications, approximate outer diameter, and approximate cross-sectional area of ​​each cable.

[0030] Step 2: Import all cable tray information into the BIM software environment, including the material type, size specifications, and design cross-sectional area coefficient of each cable tray;

[0031] Step 3: Based on the dimensions and design cross-sectional area coefficient of each cable tray, calculate the upper limit of the cross-sectional area of ​​the cables that can be laid out, which matches the corresponding material type.

[0032] Step 4: In the BIM software environment, analyze the connection relationships of the cable BIM models for which cable tray selection is required, and match the cable material table of the cable BIM models to obtain the corresponding cross-sectional area information, forming the cable data set SCable = {Cable1, Cable2, Cable3…Cable…} of the cable BIM models. n};

[0033] Step 5: Analyze the cable tray segment paths of the same row of cables based on the cable data set SCable, and match each segment with the upper limit of the cross-sectional area of ​​all cable trays. Select all cable trays that meet the requirements to form the cable tray segment path data set STray. Generate the corresponding BIM models of all cable trays based on the cable tray data set STray.

[0034] STray={Tray1, Tray2, Tray3…Tray m}

[0035] The principle of this invention is as follows:

[0036] In practical applications, the connection relationship of a cable system also needs to be stored when storing the relationship between adjacent cables in the same row, because the path between the cable system and the cable tray is not completely consistent, but rather similar to the relationship between a vehicle route and a road.

[0037] This invention, through research on national standards and specifications such as "Design Code for Power Engineering Cables GB50217-2007", "Construction Quality Acceptance Code for Building Electrical Engineering GB50303-2015", and "Fireproof and Flame-Retardant Design and Construction of Cables 06D105" and ongoing projects, adopts an innovative dual-dimensional adjacency data table technology to store cable system data sets. It stores the connection relationships of cables within the same system as well as the spatial arrangement relationships of cables in different systems, which enables intelligent selection of cable trays for extremely complex cable systems in space, segment by segment.

[0038] This invention can automatically identify cable specifications when the cable system layout path is determined, and intelligently select the most suitable cable tray type and specifications according to design requirements, thus efficiently and accurately assisting electrical designers in completing cable tray design work.

[0039] In some embodiments, step 1 includes the following steps:

[0040] Step 1.1: Analyze the model and specifications of all cables. Specifically, according to the electrical engineering cable naming rules, analyze the model and specifications of each cable and make consistent modifications to any inconsistent symbols or expressions.

[0041] Step 1.2: Analyze the approximate outer diameter of all cables. Specifically, analyze the approximate outer diameter information of each cable. If any information is missing, automatically calculate and complete it using the approximate cross-sectional area of ​​the cable.

[0042] Step 1.3: Analyze the approximate cross-sectional area of ​​all cables. Specifically, analyze the approximate cross-sectional area information of each cable. If any information is missing, automatically calculate and complete it using the approximate outer diameter of the cable.

[0043] In practical applications, the automatic conversion of the approximate outer diameter of a cable is simply a conversion between the outer diameter and area of ​​a circle.

[0044] In some embodiments, step 2 includes the following steps:

[0045] Step 2.1: Analyze the model and specifications of all cable trays. Specifically, according to the naming rules for cable trays in the electrical profession, analyze the material type in the information of each cable tray and modify the inconsistent expression methods to make them consistent.

[0046] Step 2.2: Analyze the dimensions and specifications of all cable trays. Specifically, analyze the information of each cable tray, including the dimensions and specifications of the cross-sectional width and height, and make consistent modifications to any inconsistent symbols or expressions.

[0047] Step 2.3: Analyze the design cross-sectional area coefficient of all cable trays. Specifically, analyze the required design cross-sectional area coefficient value in the information of each cable tray.

[0048] In some embodiments, in step 4, the cable BIM model includes various functional types of pipelines, including wires and signals.

[0049] In some embodiments, in step 5, the cable tray includes various types of protective conduits, including cable trays and busbars.

[0050] Example 2

[0051] Taking the selection of cable trays in the BIM model of a subway station platform installation project as an example, the following method is adopted: Figure 1 The process shown has the following specific steps:

[0052] To achieve the above objectives, the present invention adopts the following technical solution:

[0053] Step 1: Import the cable material table, which contains 320 types of cable models and specifications commonly used in subway projects, as well as the approximate outer diameter and approximate cross-sectional area of ​​the cables.

[0054] Step 1.1: Parse the cable model and specifications. Parse the cable model and specifications information in the cable material table. For example, WD ZBNBPYJYP1 2-3*95+3*16 cable is uniformly converted to the electrical professional naming method of WDZBN-BPYJYP1-2-3x95+3x16.

[0055] In practical applications, symbols such as x and X* are used as expressions for cable model specifications and are understandable in the industry. This includes different space positions, hyphens, etc., but it also causes inconsistencies in naming, which makes computer processing difficult. Without a process of parsing, escaping and unifying, it cannot play any practical value at all.

[0056] Step 1.2: Analyze the approximate outer diameter of the cable. Analyze the approximate outer diameter information of the cable in the cable material table, such as WDZBN-BPYJYP1-2-3x95+3x16, whose approximate outer diameter is 35.67mm.

[0057] Step 1.3: Analyze the approximate cross-sectional area of ​​the cable. Analyze the approximate cross-sectional area information of the cable in the cable material table and complete the approximate cross-sectional area of ​​WDZBN-BPYJYP1-2-3x95+3x16 to 999mm2.

[0058] Step 2: Import the cable tray material table, which contains 80 types of cable tray materials commonly used in subway projects, cable tray size specifications, and design cross-sectional area coefficients;

[0059] Step 2.1: Parse the cable tray material type. Parse the cable tray material type information in the cable tray material table, such as hot-dip galvanized cable tray - trough type is uniformly converted to trough type cable tray (hot-dip galvanized steel plate);

[0060] Step 2.2: Parse the cable tray size specifications. Parse the cable tray cross-section width, cross-section height and other size specifications information in the cable tray material table, and convert the 400x600 cable tray size to 600*400.

[0061] Step 2.3: Analyze the design cross-sectional area coefficient. The required value for the design cross-sectional area coefficient in the material table is 40%.

[0062] Step 3: Calculate the upper limit of the cross-sectional area of ​​the cable tray. Based on the cable tray size specifications and the design cross-sectional area coefficient, calculate the upper limit of the cross-sectional area of ​​the cables that can be arranged for each specification under 80 cable tray material types.

[0063] Step 4: Select and identify cable information. Select 497 high-voltage system cables from the BIM model, analyze the connection relationships of the selected high-voltage cable systems, and obtain cross-sectional area information by matching the cable material table to form a cable system data set S. Cable ={Cable1, Cable2, Cable3…Cable n};

[0064] In practical applications, the number of cable and wire systems is extremely large, and the number of segments can be broken down into tens of thousands. If we simply use a one-dimensional database to store and calculate them, it will take a huge amount of time, possibly exceeding the computing power limit of a computer. Furthermore, it cannot meet the professional requirements of electrical design and cannot guarantee its accuracy. Therefore, the use of two-dimensional adjacency data table technology is not only an innovation in performance algorithms, but also a pioneering effort in practically feasible technologies.

[0065] Step 5: Intelligent cable tray selection, based on cable system data set S CableThe cable tray segment paths of cables in the same row are analyzed, and each segment is matched with a cable tray that meets the upper limit of the cross-sectional area in the cable tray material table, forming a data set S of cable tray segment paths. Tray ={Tray1,Tray2,Tray3…Tray m}, generated 3209 cable tray BIM models to complete intelligent cable tray selection.

[0066] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A BIM-based cable tray selection method based on cable identification; characterized in that, The steps include: Step 1: Import all cable information into the BIM software environment, including the model specifications, approximate outer diameter, and approximate cross-sectional area of ​​each cable. Step 1.1: Parse the model and specifications of all the cables. Specifically, according to the electrical cable naming rules, parse the model and specifications in the information of each cable, and modify any inconsistent symbols or expressions to make them consistent. Step 1.2: Analyze the approximate outer diameter of all the cables. Specifically, analyze the approximate outer diameter information of each cable. If there are any missing values, automatically calculate and fill them in using the approximate cross-sectional area of ​​the cable. Step 1.3: Analyze the approximate cross-sectional area of ​​all the cables. Specifically, analyze the approximate cross-sectional area information of each cable. If there are any missing information, automatically calculate and complete the information using the approximate outer diameter of the cable. Step 2: Import all cable tray information into the BIM software environment, including the material type, size specifications, and design cross-sectional area coefficient of each cable tray; Step 2.1: Analyze the model and specifications of all the cable trays. Specifically, according to the naming rules for cable trays in the electrical profession, analyze the material type in the information of each cable tray and modify the inconsistent expression methods to make them consistent. Step 2.2: Analyze the dimensions and specifications of all the cable trays, specifically: analyze the dimensions and specifications of each cable tray, including the width and height of the cable tray cross-section, and modify any inconsistent symbols or expressions to make them consistent. Step 2.3: Analyze the design cross-sectional area coefficient of all the cable trays, specifically: analyze the required design cross-sectional area coefficient value in the information of each cable tray; Step 3: Based on the dimensions and design cross-sectional area coefficient of each cable tray, calculate the upper limit of the cross-sectional area of ​​the cable that can be laid out to match the corresponding material type; Step 4: In the BIM software environment, analyze the connection relationships of the cable BIM models for which cable tray selection is required, and match the cable material table of the cable BIM models to obtain the corresponding cross-sectional area information, forming the cable data set SCable = {Cable1, Cable2, Cable3…Cable…} of the cable BIM models. n }; Step 5: Analyze the cable tray segment path of the same row of cables according to the cable data set SCable, and match each segment with the upper limit of the cross-sectional area of ​​all the cable trays. Select all the cable trays that meet the requirements to form the cable tray segment path data set STray, and generate the corresponding BIM models of all cable trays according to the cable tray data set STray. STray={Tray1,Tray2,Tray3…Tray m }。 2. The BIM cable tray selection method based on cable identification according to claim 1, characterized in that, In step 4, the cable BIM model includes various functional types of pipelines, including wires and signals.

3. The BIM cable tray selection method based on cable identification according to claim 1, characterized in that, In step 5, the cable tray includes various types of protective pipelines, including cable trays and busbars.

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