Manhole cover statistical method

Abstract

The invention provides a manhole cover statistical method. The manhole cover statistical method comprises the following steps: S1, establishing a manhole cover model library containing manhole covers of all specifications; s2, defining purchasing characteristic elements of the manhole cover; s3, calling the manhole cover model from the manhole cover model library by using three-dimensional design software, and combining the manhole cover model with the ship model to form a manhole cover arrangement scheme of the whole ship; s4, arranging manhole cover arrangement information of the whole ship to form a manhole cover arrangement detail table; s5, in the manhole cover arrangement detail list, the purchasing characteristic elements are reserved, other elements are removed, and a manhole cover purchasing element list is formed; and S6, traversing the manhole cover purchase element table, obtaining the specifications of all manhole covers needing to be installed on the ship and the corresponding occurrence times, and forming a manhole cover number list. According to the technical scheme, the accurate manhole cover number list can be provided, and the manhole cover number list is automatically updated when the manhole cover arrangement scheme of the ship changes, so that manhole cover statistics is more accurate and efficient.

Description

Technical Field

[0001] The present application relates to the field of shipbuilding, and in particular to a manhole cover counting method. Background Art

[0002] Marine manhole covers are critical devices used for cabin entry and exit, and are widely used on various types of ships. Marine manhole covers consist of a cover plate and its fixings, typically installed at the manhole opening on a ship, and perform several important functions, including sealing and corrosion protection. Ship manhole covers are numerous and widely distributed. For example, a typical ship is typically equipped with 100-250 manhole covers, located in various locations such as the deck, inner bottom plate, bulkhead, and platform. Key parameters for manhole covers include type code, specifications and dimensions, cover plate thickness, fire rating, gasket tightness, gasket material, and seat plate material. A single ship typically uses manhole covers of various types and specifications. For example, the type code may include AA / BA / CA, the gasket tightness may include watertight / oiltight, and the gasket material may include Grade A steel / AH high-strength steel. Manhole covers with different parameters are used based on the size and strength requirements of the manholes in each compartment of the ship, as well as the requirements of classification society regulations. Therefore, when purchasing manhole covers, the shipyard procurement department needs to clearly know the number of manhole covers of various forms and specifications. Accurate manhole cover statistics are crucial for the normal construction of ships, the smooth progress of the procurement process, and subsequent use and maintenance.

[0003] In the existing process, manhole cover statistics are usually completed manually by designers. Specifically, after completing the drawing design and model layout of the manhole cover layout of the entire ship, the designers manually list the statistical list of manhole covers and provide the list to the shipyard procurement department for purchase from external suppliers. However, due to the large number and variety of manhole covers, various errors will inevitably occur in the traditional manual counting process, such as quantity errors, form and specification errors, etc., which will bring many inconveniences to the procurement department, and then slow down the progress of on-site construction. In serious cases, it may also affect the construction rhythm of the entire ship, causing significant economic losses. Therefore, there is an urgent need for a scientific and efficient statistical method to accurately and efficiently count the manhole covers of ships, avoid various errors that may occur in the statistical process, and improve the efficiency of the entire ship construction. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a manhole cover statistics method, which can realize the classified statistics of manhole covers on ships, provide technical personnel with an accurate list of manhole cover quantities, and automatically update the manhole cover quantity list when the manhole cover layout plan of the ship changes, thereby effectively improving the accuracy and efficiency of manhole cover statistics, accelerating the progress of ship construction, and reducing manpower and material costs.

[0005] This application provides a manhole cover counting method, comprising the following steps:

[0006] S1. Establish a manhole cover model library including manhole covers of all specifications;

[0007] S2. Define the purchasing characteristics of manhole covers;

[0008] S3. Using 3D design software, call a manhole cover model from a manhole cover model library, and combine the manhole cover model with the ship model to form a manhole cover layout plan for the entire ship;

[0009] S4. Arrange the layout information of manhole covers on the entire ship and form a detailed list of manhole cover layouts;

[0010] S5. In the manhole cover layout details table, retain the procurement characteristic elements and remove other elements to form a manhole cover procurement element table;

[0011] S6. Traverse the manhole cover procurement element table to obtain all the specifications of the manhole covers that need to be installed on the ship and the corresponding number of occurrences, and form a manhole cover quantity list.

[0012] In an implementable solution, the manhole cover statistics method further includes the following steps: S7. During the ship construction process, when the number of manhole covers changes, or the procurement characteristic elements of some / all manhole covers change, a new manhole cover layout plan is formed in the three-dimensional design software, thereby automatically updating the manhole cover quantity list.

[0013] In an implementable solution, step S7 includes: S71, comparing the new and old manhole cover layout plans in the three-dimensional design software, and marking the manhole cover models that have been changed; S72, using the output report function of the three-dimensional design software to generate a manhole cover difference information list; S73, based on the manhole cover difference information list, automatically updating the corresponding items in the manhole cover quantity list.

[0014] In one feasible solution, the purchasing characteristic factors of the manhole cover include type code, specification size, cover plate thickness, fire protection level, gasket tightness, gasket material, and seat plate material.

[0015] In one feasible solution, in the process of arranging manhole covers throughout the ship, it is necessary to meet the relevant requirements for manhole cover arrangement in the entire ship's manhole cover arrangement drawing, ship specifications, and classification society regulations.

[0016] In one feasible solution, each time a manhole cover is arranged, an interference check is performed on the arranged manhole cover to ensure that the manhole cover does not collide or conflict with other components of the ship during installation and use.

[0017] In one feasible solution, each time a manhole cover is arranged, a space inspection is performed on the arranged manhole cover to ensure that the installation position of the manhole cover meets the design requirements and that there is sufficient operation and maintenance space around it, while ensuring that the manhole cover meets safety and functional requirements.

[0018] In one feasible solution, the manhole cover arrangement details table includes all the purchasing characteristic elements of the manhole cover, and also includes the relative position of the manhole cover in the coordinate system, the cabin name and the part number.

[0019] In one feasible solution, in step S6, a table tool is used to traverse and filter the manhole cover procurement element table using the procurement characteristic elements of the manhole covers as report fields, and the number of occurrences of manhole covers with exactly the same dimensional information is counted to form a complete manhole cover quantity list.

[0020] In one feasible solution, CATIA software is used as the three-dimensional design software.

[0021] Compared with the prior art, the beneficial effects of this application include at least:

[0022] The present application provides a manhole cover statistics method, which uses a complete manhole cover model library and three-dimensional design software to model and analyze the entire ship, and by defining the procurement characteristic elements of the manhole covers and digitally analyzing all manhole covers based on these procurement characteristic elements, it can achieve classification statistics of manhole covers and provide technical personnel with an accurate list of manhole cover quantities. Compared with traditional manual statistics methods, the manhole cover statistics method of the present application is more scientific and accurate, and can effectively reduce statistical errors and omissions caused by human errors, ensuring the normal construction of ships, the smooth progress of the procurement process, and the subsequent use and maintenance links. In addition, because it relies on three-dimensional design software for automatic classification and statistics, the manhole cover statistics method of the present application can greatly improve the efficiency of manhole cover statistics, speed up the progress of ship construction, and effectively reduce manpower and material costs.

[0023] Furthermore, by adopting the manhole cover statistics method provided in the present application, when the manhole cover layout plan of the ship changes, such as the total number changes caused by adding / reducing manhole covers or the classification number changes caused by changing some manhole cover types, the manhole cover quantity list can be automatically updated by comparing the new and old manhole cover layout plans, thereby effectively avoiding statistical errors caused by changes in the manhole cover layout plan and further improving the efficiency of ship construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 Flowchart of a manhole cover statistics method according to an embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the interface of the manhole cover model library;

[0027] Figure 3 This is a schematic diagram of the manhole cover layout scheme in the 3D design software;

[0028] Figure 4 A schematic diagram of the manhole cover arrangement schedule;

[0029] Figure 5 A schematic diagram of the table of elements for purchasing manhole covers;

[0030] Figure 6 A schematic diagram of the manhole cover quantity list;

[0031] Figure 7 The following are the cross-sectional view and top view of the manhole cover with a panel;

[0032] Figure 8 It is a cross-sectional view and a top view of a flat manhole cover;

[0033] Figure 9 The following are the cross-sectional view and top view of the embedded manhole cover with cover;

[0034] Figure 10 The following are the cross-sectional view and top view of the buried manhole cover without a cover;

[0035] Figure 11 Cross-sectional and top views of a hinged manhole cover.

[0036] In the figure: 1. Cover plate; 2. Seat plate; 3. Gasket; 4. Hull structure. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0039] like Figure 1 As shown, the present application provides a manhole cover counting method, which specifically includes the following steps:

[0040] S1, such as Figure 2 As shown in FIG, a manhole cover model library including manhole covers of all specifications is established.

[0041] S2. Define the purchasing characteristics of manhole covers. Specifically, the purchasing characteristics may include: model code, specification size, cover thickness, fire rating, gasket tightness, gasket material, and seat material. Figure 7-11 As shown, the type code indicates the appearance of the manhole cover, including AA type (manhole cover with enclosure), BA type (flat manhole cover), CA type (buried manhole cover with cover), DA type (buried manhole cover without cover), and EA type (hinged manhole cover), a total of 5 types. The specification size indicates the size of the manhole cover, which is usually based on the corresponding manhole opening size. Common sizes include 600×400mm, 600×450mm, 800×600mm, Φ450mm, etc. The cover plate 1 is a sealing plate used to cover the manhole opening and close the opening. According to the provisions of the ship design manual and the classification society's rules and regulations, the thickness of the cover plate is usually required to be equal to or greater than the thickness of the hull structural steel plate where the manhole is located. Specific commonly used thicknesses include 12mm, 16mm, 18mm, etc. According to the classification of dangerous areas on ships, the fire protection grade of manhole covers is consistent with the fire protection grade of the hull structure steel plate where the manhole opening is located (such as A-0 fire protection). Usually, for such manhole covers with fire protection requirements, each classification society will require the provision of corresponding fire protection certificates. Figure 7-11 As shown, to ensure that there is no water leakage between the cover plate 1 and the base plate 2 of the manhole cover, a layer of gasket 3 is usually set to ensure its tightness. Different sealing gaskets are provided according to the different requirements of the liquid in the compartment, such as water-tight gaskets for water tanks and oil-tight gaskets for oil tanks. The basic requirement for the gasket material is that it cannot chemically react with the liquid in the compartment to avoid affecting the sealing effect. For example, water tank gaskets are usually required to be watertight with chloroprene rubber, oil tank gaskets are required to be oiltight with nitrile rubber, drinking water tank gaskets are made of edible rubber, and urea tank gaskets are made of Teflon. Figure 7-11 As shown, since the seat plate 2 is directly welded to the hull structure 4, to ensure the strength of the seat plate, the seat plate material is usually ordinary A-grade steel, AH high-strength steel, etc. In the manhole cover model library, the parameters of each manhole cover model include the above procurement feature elements.

[0042] S3, such as Figure 3 As shown, using three-dimensional design software, the manhole cover model is called from the manhole cover model library, and the manhole cover model is combined with the ship model to form a manhole cover layout plan for the entire ship. Specifically, in the three-dimensional design software, a complete ship model can be first established, and then the manhole cover can be installed for the ship model in a preset order. For example, the manhole cover installation position can be found on the ship model in an order from front to back and from top to bottom. Each time the manhole cover installation position is found, the manhole cover model of the corresponding specification is called from the manhole cover model library, and then it is accurately installed on the ship model according to the actual installation parameters (such as installation direction, angle, etc.), and finally a manhole cover layout plan including the ship model and all installed manhole cover models is formed. Preferably, the three-dimensional design software can use CATIA. CATIA software can realize multiple functions such as high-precision three-dimensional modeling of complex shapes, collision detection, gap analysis, etc., and can be seamlessly connected with the manhole cover model library, freely call and interact with the manhole cover model, and support real-time update and feedback of the manhole cover model, which can fully meet the various needs of the manhole cover statistical method.

[0043] S4. Arrange the layout information of the manhole covers on the whole ship and form a detailed list of manhole covers, such as Figure 4 The manhole cover layout details list shall include at least all the purchasing characteristic elements of the manhole cover. In addition, it may also include the relative position of the manhole cover in the coordinate system, the cabin name, and the part number, etc. There are no excessive restrictions here.

[0044] S5. In the manhole cover layout details table, retain the procurement characteristic elements and remove other elements to form the manhole cover procurement element table, such as Figure 5 shown.

[0045] S6. Traverse the manhole cover procurement factor table to obtain the specifications of all manhole covers that need to be installed on the ship and the corresponding number of occurrences, and form a manhole cover quantity list. Specifically, you can use the table tool to use the procurement feature elements of the manhole cover as the report field to traverse and filter the manhole cover procurement factor table, count the number of occurrences of manhole covers with exactly the same information in each dimension, and form a complete manhole cover quantity list, such as Figure 6 shown.

[0046] S7. During the shipbuilding process, when the number of manhole covers changes, or when the procurement characteristics of some / all manhole covers change, a new manhole cover layout plan is generated in the 3D design software, thereby automatically updating the manhole cover quantity list. Specifically, step S7 may include the following steps:

[0047] S71. Compare the new and old manhole cover layouts in the 3D design software and mark the manhole cover models that have been modified. Generally, newly added, removed, and modified manhole cover models can be marked separately to facilitate subsequent generation of corresponding lists. Furthermore, the color of the modified manhole cover models can be changed in the view so that technicians can intuitively understand the changes in the manhole cover. For example, newly added, removed, and modified manhole cover models can be marked in red, yellow, and green, respectively, while unchanged manhole cover models can be marked in blue.

[0048] S72. Generate a list of differences between the new and old manhole cover layouts using the report output function of the 3D design software. Specifically, the list of differences includes at least all manhole cover models included in the new and old manhole cover layouts, as well as the corresponding change status of each manhole cover model, such as "no change," "added," "removed," or "changed specifications."

[0049] S73. Automatically update the corresponding entry in the manhole cover quantity list based on the manhole cover difference information list. For example, if the manhole cover difference information list shows that a manhole cover has been added to a certain location on the ship, the quantity under the specification entry for the manhole cover in the manhole cover quantity list is increased by 1. If a manhole cover has been removed, the quantity under the specification entry for the manhole cover in the manhole cover quantity list is decreased by 1.

[0050] It should be noted that in step S3, during the arrangement of manhole covers throughout the ship, the requirements for the arrangement of manhole covers in the ship's manhole cover arrangement plan, the ship's specifications, and the classification society's specifications must be met. The ship's manhole cover arrangement plan specifies requirements for the number, distribution, specific coordinates, and specifications of the manhole covers. The ship's specifications specify requirements for the material, performance, design / manufacturing standards, and marking and numbering of the manhole covers. The classification society's specifications specify requirements for the safety (such as fire protection, corrosion resistance, and tightness), reliability, certification, and inspection of the manhole covers. During the arrangement of manhole covers, only manhole covers that fully meet the above requirements can be used.

[0051] The manhole cover statistics method of the present application uses a complete manhole cover model library and three-dimensional design software to conduct modeling analysis on the entire ship. By defining the procurement characteristic elements of the manhole covers and conducting digital analysis on all manhole covers based on these procurement characteristic elements, it is possible to achieve classification statistics of the manhole covers and provide technical personnel with an accurate list of the number of manhole covers. Compared with traditional manual statistics methods, the manhole cover statistics method of the present application is more scientific and accurate, and can effectively reduce statistical errors and omissions caused by human errors, ensuring the normal construction of ships, the smooth progress of the procurement process, and the subsequent use and maintenance links. In addition, because it relies on three-dimensional design software for automatic classification and statistics, the manhole cover statistics method of the present application can greatly improve the efficiency of manhole cover statistics, speed up the progress of ship construction, and effectively reduce manpower and material costs.

[0052] Furthermore, by adopting the manhole cover statistics method provided in the present application, when the manhole cover layout plan of the ship changes, such as the total number changes caused by adding / reducing manhole covers or the classification number changes caused by changing some manhole cover types, the manhole cover quantity list can be automatically updated by comparing the new and old manhole cover layout plans, thereby effectively avoiding statistical errors caused by changes in the manhole cover layout plan and further improving the efficiency of ship construction.

[0053] In one embodiment, each time a manhole cover is arranged, an interference check is performed on the arranged manhole cover to ensure that the manhole cover does not collide or conflict with other components of the ship during installation and use. Specifically, the manhole cover can be arranged and simulated first using three-dimensional design software, that is, the manhole cover model is accurately placed in the ship model and integrated with other hull structures, equipment and pipeline models, and then the spatial relationship of the manhole cover in the actual installation position is understood with the help of software functions or direct observation. For example, the collision detection function of CATIA software can be used to automatically detect the interference between the manhole cover and other models and generate a detailed report. If the manhole cover interferes with other components, the layout of the manhole cover can be adjusted or replaced with a manhole cover of other specifications, provided that the design specifications are met, and then the interference check is performed again.

[0054] In one embodiment, each time a manhole cover is arranged, a spatial inspection is performed on the arranged manhole cover to ensure that the installation position of the manhole cover meets the design requirements and that there is sufficient space for operation and maintenance around it, while also ensuring that the manhole cover meets safety and functional requirements. Specifically, 3D design software can be used to simulate the installation, removal, and use of a specific manhole cover in a 3D model of the ship to check the spatial adaptability of the manhole cover under different operating conditions. For example, the motion simulation function of CATIA software can be used to simulate the opening and closing process of the manhole cover to check whether sufficient operating space is left for the user when opening and closing. If not, the layout of the manhole cover can be adjusted or replaced with a manhole cover of other specifications, provided that the design specifications are met, and then the spatial inspection can be repeated.

[0055] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for counting manhole covers, characterized in that: include: S1. Establish a manhole cover model library including manhole covers of all specifications; S2. Define the purchasing characteristics of manhole covers; S3. Using 3D design software, call a manhole cover model from a manhole cover model library, and combine the manhole cover model with the ship model to form a manhole cover layout plan for the entire ship; S4. Arrange the layout information of manhole covers on the entire ship and form a detailed list of manhole cover layouts; S5. In the manhole cover layout details table, retain the procurement characteristic elements and remove other elements to form a manhole cover procurement element table; S6. Traverse the manhole cover procurement element table to obtain all the specifications of the manhole covers that need to be installed on the ship and the corresponding number of occurrences, and form a manhole cover quantity list.

2. The manhole cover counting method according to claim 1, characterized in that: Also includes: S7. During the shipbuilding process, when the number of manhole covers changes, or the procurement characteristics of some / all manhole covers change, a new manhole cover layout plan is formed in the 3D design software, thereby automatically updating the manhole cover quantity list.

3. The manhole cover counting method according to claim 2, characterized in that: Step S7 includes: S71. Compare the new and old manhole cover layouts in the 3D design software and mark the manhole cover models that have been modified; S72. Using the output report function of the 3D design software, generate a list of manhole cover differences between the new and old manhole cover layouts; S73. Based on the manhole cover difference information list, automatically update the corresponding items in the manhole cover quantity list.

4. The manhole cover counting method according to claim 1, characterized in that: The purchasing characteristic factors of manhole covers include type code, specification size, cover thickness, fire protection level, gasket tightness, gasket material, and seat plate material.

5. The manhole cover counting method according to claim 1, characterized in that: In the process of arranging manhole covers on the entire ship, it is necessary to meet the relevant requirements for manhole cover arrangement in the entire ship manhole cover arrangement drawing, ship specifications, and classification society regulations.

6. The manhole cover counting method according to claim 1, characterized in that: Each time a manhole cover is arranged, an interference check is carried out on the arranged manhole cover to ensure that the manhole cover does not collide or conflict with other parts of the ship during installation and use.

7. The manhole cover counting method according to claim 1, characterized in that: Each time a manhole cover is arranged, a space inspection is carried out on the arranged manhole cover to ensure that the installation position of the manhole cover meets the design requirements and that there is sufficient operation and maintenance space around it, and at the same time ensure that the manhole cover meets safety and functional requirements.

8. The manhole cover counting method according to claim 1, characterized in that: The manhole cover layout details table includes all the purchasing characteristic elements of the manhole cover, as well as the relative position of the manhole cover in the coordinate system, the cabin name and the part number.

9. The manhole cover counting method according to claim 1, characterized in that: In step S6, using a table tool, with the procurement characteristic elements of manhole covers as report fields, the manhole cover procurement element table is traversed and filtered, and the number of occurrences of manhole covers with exactly the same dimensional information is counted to form a complete manhole cover quantity list.

10. The manhole cover counting method according to claim 1, characterized in that: CATIA software is used as 3D design software.

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