Coal bunker closing three-dimensional modeling and wear-resistant steel plate shape drawing method

Abstract

The present application relates to a kind of coal bunker closing three-dimensional modeling and wear-resistant steel plate shape drawing method, first based on mine production conditions and coal feeder interface determines coal bunker closing parameter and square outlet size;Then through three-dimensional modeling, according to the parameter drawing bottom rectangle and top circle, and determine the extension of four theoretical bevel each generatrix, in turn through extension and Boolean difference set operation constructs the three-dimensional entity model of round closing square transition section;Next to the three-dimensional entity model along specified section is cut, generates the contour two-dimensional engineering drawing containing interpenetrating line;Finally, the target surface of the three-dimensional entity model inner wall is carried out deployable surface operation, generates the plane development drawing of each surface as the blanking drawing of wear-resistant steel plate.The present application carries out stereoscopic display to the process that how coal bunker is shrunk from round mouth to square mouth, effectively changes the drawing of interpenetrating line in coal bunker design process section view from abstract to intuitive, and makes up the blank that wear-resistant steel plate is difficult to draw at coal bunker closing.

Description

Technical Field

[0001] This invention relates to the field of coal mine bunker design technology, and in particular to a method for three-dimensional modeling of the bunker opening and drawing the shape of wear-resistant steel plates. Background Technology

[0002] my country is the world's largest producer and consumer of coal. Coal bunkers, as a crucial transit point in coal transportation, optimize coal flow paths, reduce unnecessary transportation steps and time waste, and maximize production efficiency. Coal bunker design includes location, height, diameter, opening form, and support system. During the design process, coal bunker openings can take various forms, including gradually tapering from round to square, sloping round to square, and hyperbolic designs. The round-to-square form is more complex and requires a higher level of spatial imagination from the designer, adding to the design difficulty. To enhance the support strength of the coal bunker opening and reduce wear from rolling coal, wear-resistant steel plates are often installed at the opening. However, due to the complex spatial overlap at the opening, determining the size of the wear-resistant steel plates is difficult, posing challenges to on-site construction and material procurement.

[0003] Traditional design methods primarily rely on two-dimensional plans and the designer's spatial imagination. Designers need to approximate the spatial curve (intersection line) created by the intersection of the cylindrical surface and the converging slope on two-dimensional drawings through complex projections and geometric constructions. This process not only demands extremely high professional skills from the designer but is also time-consuming, labor-intensive, and difficult to guarantee accuracy. More importantly, to protect the inner wall of the coal bunker and reduce coal impact and friction wear, wear-resistant steel plates need to be laid on the inner wall of the "round-to-square" transition section. Because this transition section consists of multiple complex curved surfaces (cylindrical surfaces, multiple slopes), it is almost impossible to accurately calculate the actual unfolded shape and size of each wear-resistant steel plate on the plane in two-dimensional design. This leads to the cutting of wear-resistant steel plates often relying on experience-based estimations, requiring extensive cutting and fitting work during on-site installation. This not only increases construction difficulty and time complexity but also causes serious material waste and potential engineering quality risks.

[0004] With the development of 3D computer-aided design (CAD) technology, new ideas have been provided for the design of complex structures. However, there is still a lack of open and effective solutions in the existing technology for how to creatively apply 3D CAD technology to solve the specific and complex engineering problem of "round coal bunkers with square dimensions" and form a complete, efficient and accurate standardized method from engineering parameter input to wear-resistant steel plate processing drawings output. Summary of the Invention

[0005] The purpose of this invention is to provide a method for three-dimensional modeling of coal bunker openings and drawing the shape of wear-resistant steel plates, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, this invention provides a method for 3D modeling of coal bunker openings and drawing the shape of wear-resistant steel plates, comprising the following steps:

[0007] S100. Determine the closing parameters of the coal bunker based on the mine production conditions, and determine the size and position of the square outlet at the bottom of the coal bunker based on the coal feeder interface. The closing parameters include at least the coal bunker diameter and the closing angle.

[0008] S200. Through 3D modeling, perform the following operations to generate a 3D solid model of the rounded-to-square transition section:

[0009] S210. Draw the bottom rectangle and top circle according to the size and position of the square outlet and the closing parameters respectively;

[0010] S220. Based on the diameter and closing angle of the coal bunker, calculate the coordinates of the intersection points between the top circle and each theoretical inclined plane; connect each side of the bottom rectangle with the corresponding intersection coordinates to determine the extension generatrix of each of the four theoretical inclined planes.

[0011] S230. Extend the bottom rectangle and the top circle along the axial direction to form a cube and a cylinder, respectively. Extend the extension generatrix along the direction of the connected bottom rectangle side to obtain four extension slopes. Perform Boolean difference operation on the cylinder and the four extension slopes to obtain the three-dimensional solid model of the circle-to-square transition section.

[0012] S300. On the three-dimensional solid model, cut along two preset directions that pass through the center of the square exit and are perpendicular to each other, and generate and export the outline two-dimensional engineering drawings of each cut surface.

[0013] S400. Select the target surface that forms the inner wall in the three-dimensional solid model, perform unfoldable surface operation, generate and export the planar unfolded view of each target surface, and use it as the blanking view of the wear-resistant steel plate at the corresponding position.

[0014] Optionally, the mine production conditions include the overall mine technical equipment level, roadway surrounding rock conditions, and mine production capacity; wherein, the mine technical equipment level is characterized by the conveying capacity of the belt conveyors at the upper and lower ends of the coal bunker.

[0015] Optionally, the closing parameters may also include the coal bunker closing method.

[0016] Optionally, of the four inclined planes, two opposite inclined planes have the same angle with the horizontal plane, while two adjacent inclined planes have different angles with the horizontal plane.

[0017] Optionally, the two preset directions are those that pass through the center of the square exit and are parallel to the directions of the two adjacent rectangular sides.

[0018] Optionally, generating and exporting the two-dimensional engineering drawings of the outlines of each section plane specifically includes: placing the three-dimensional solid model in the front view and right view perspectives corresponding to the two preset directions, and exporting the two-dimensional drawing files of the displayed outlines.

[0019] Optionally, the target surface includes the inner surface of the cylindrical region, the inner surfaces of the four inclined regions, and the inner surface of the cuboid region in the three-dimensional solid model.

[0020] Optionally, 3D modeling can be performed using Rhino software.

[0021] Optionally, the exported 2D outline engineering drawings and planar unfolded drawings are all in DXF format.

[0022] Based on the same inventive concept, the present invention also provides a readable storage medium storing a computer program thereon, which, when executed, can realize the method for three-dimensional modeling of coal bunker closure and drawing the shape of wear-resistant steel plate as described above.

[0023] The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape provided by the present invention has at least one of the following beneficial effects:

[0024] (1) In response to the pain point of the closing section in the coal bunker design process, a three-dimensional model of the coal bunker closing section was established using three-dimensional CAD technology (such as Rhino). The process of how the coal bunker shrinks from a round opening to a square opening was displayed in a three-dimensional way, and the abstract "round opening to square opening" spatial structure was transformed into an intuitive and accurate digital model, which completely got rid of the excessive reliance on the designer's personal spatial imagination.

[0025] (2) Using the sectioning function of 3D software, the intersection lines on different sections of the coal bunker can be directly exported, which effectively transforms the drawing of the intersection lines in the section drawing of the coal bunker design process from abstract to intuitive, and provides a simple drawing method for the intersection lines in addition to the drawing method.

[0026] (3) By unfolding the three-dimensional curved surface, the irregular curved surfaces were unfolded to obtain the shape and size of the wear-resistant steel plate lining the inner side of the silo wall. This filled the gap in the drawing of the wear-resistant steel plate at the coal silo end, provided feasible space for the segmented processing and customization of the wear-resistant steel plate, reduced the difficulty of on-site installation, and effectively avoided the waste of materials. Attached Figure Description

[0027] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein:

[0028] Figure 1 A flowchart illustrating a method for three-dimensional modeling of coal bunker closure and drawing the shape of wear-resistant steel plates according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram illustrating a three-dimensional representation of the process by which a coal bunker shrinks from a round opening to a square opening, according to an embodiment of the present invention.

[0030] The reference numerals in the attached figures are as follows:

[0031] 1-Bottom rectangle; 2-Top circle; 3-Extended generatrix; 4-Cube; 5-Cylinder; 6-Extended inclined plane; 7-3D solid model; 8-Outline 2D engineering drawing; 9-Planar unfolded drawing. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes said element. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Please refer to Figure 1 and Figure 2 This invention provides a method for 3D modeling of coal bunker openings and drawing the shape of wear-resistant steel plates, including the following steps:

[0037] S100. Determine the closing parameters of the coal bunker based on the mine production conditions, and determine the size and position of the square outlet at the bottom of the coal bunker based on the coal feeder interface. The closing parameters shall include at least the coal bunker diameter and the closing angle.

[0038] S200. Through 3D modeling, perform the following operations to generate a 3D solid model of the rounded-to-square transition section:

[0039] S210. Draw the bottom rectangle and top circle 2 according to the size and position of the square outlet and the closing parameters;

[0040] S220. Based on the diameter and closing angle of the coal bunker, calculate the coordinates of the intersection points between the top circle 2 and each theoretical inclined plane; connect each side of the bottom rectangle 1 with the corresponding intersection point coordinates to determine the extension generatrix 3 of each of the four theoretical inclined planes.

[0041] S230. Extend the bottom rectangle 1 and the top circle 2 along the axial direction to form a cube 4 and a cylinder 5 respectively. Extend the extension generatrix 3 along the direction of the connected bottom rectangle side to obtain four extension slopes 6. Perform Boolean difference operation on the cylinder 5 and the four extension slopes 6 to obtain the three-dimensional solid model 7 of the circle-to-square transition section.

[0042] S300. On the three-dimensional solid model 7, cut along two preset directions that pass through the center of the square exit and are perpendicular to each other, and generate and export the outline two-dimensional engineering drawing 8 of each cut surface.

[0043] S400. Select the target surface that constitutes the inner wall in the three-dimensional solid model 7, perform unfoldable surface operation, generate and export the planar unfolded diagram 9 of each target surface, as the blanking diagram of the wear-resistant steel plate at the corresponding position.

[0044] This invention addresses the pain point of the closing section in coal bunker design by establishing a three-dimensional model of the coal bunker's closing section. It derives the intersection lines on different sections of the coal bunker's closing section (i.e., the two-dimensional engineering drawing 8 of the outline), and unfolds each irregular curved surface to obtain the shape and dimensions of the wear-resistant steel plate lining the inner side of the bunker wall. This invention effectively transforms the abstract "round-to-square" spatial structure into an intuitive and accurate digital model, providing a simplified method for drawing intersection lines besides drafting methods. It fills the gap in drawing the wear-resistant steel plate at the coal bunker's closing section, provides feasible space for the segmented processing and customization of the wear-resistant steel plate, reduces the difficulty of on-site installation, and effectively avoids material waste.

[0045] First, execute S100 to determine the closing parameters of the coal bunker based on the mine production conditions, and determine the size and position of the square outlet at the bottom of the coal bunker based on the coal feeder interface. The closing parameters include at least the coal bunker diameter and the closing angle.

[0046] In this embodiment, the mine production conditions include the overall level of mine technology and equipment, the surrounding rock conditions of the roadways, and the mine's production capacity. The level of mine technology and equipment is primarily characterized by the conveying capacity of the belt conveyors at the top and bottom of the coal bunker. The design of the closing section must match this capacity to ensure smooth coal flow, avoiding both bottlenecks and wasted equipment capacity.

[0047] Based on the above mine production conditions, key closing parameters are determined, including at least the coal bunker diameter (the diameter of the upper circular silo) and the closing angle (the angle between the inclined plane and the horizontal or vertical plane, which determines the steepness of the transition section). Preferably, the closing parameters may also include the coal bunker closing form, such as a simple conical inclined closing or a complex form with a curved transition.

[0048] Simultaneously, based on the product manual or interface diagram of the selected coal feeder, determine the dimensions (length and width) of the coal feeder opening and its relative position to the center of the coal bunker. Based on this, deduce the dimensions and location of the square outlet at the bottom of the coal bunker. This square outlet is typically rectangular, and its dimensions need to be slightly larger than the coal feeder opening, taking into account installation clearance and sealing requirements. Its center is generally aligned with the vertical centerline of the coal bunker.

[0049] Then, execute S200 to generate a 3D solid model 7 of the rounded-to-square transition section through 3D modeling. This stage is completed in a 3D modeling software environment.

[0050] In this embodiment, Rhino software is preferably used for 3D modeling. Rhino is a powerful and professional 3D modeling software. It can be widely used in 3D animation production, industrial manufacturing, scientific research, and mechanical design. It has powerful functions in curve and surface generation, precise dimension input, area and volume output, and 3D surface unfolding, and is relatively easy to operate, providing an effective tool for solving 3D engineering problems. However, those skilled in the art should understand that other mainstream CAD software with similar 3D solid modeling, Boolean operations, and surface unfolding functions (such as AutoCAD, SolidWorks, CATIA, etc.) can also be used to implement this invention, which are alternative solutions to this invention.

[0051] like Figure 2 As shown in (a), first execute S210 to draw the basic outline: Start the 3D modeling software and establish a 3D coordinate system (e.g., with the center of the square exit as the origin and the Z-axis pointing vertically upwards). Based on the size and position of the square exit determined in S100, use the rectangle drawing tool to draw the bottom rectangle 1 on an appropriate elevation plane (e.g., Z=0). Then, based on the diameter of the coal bunker, draw the top circle 2 on another elevation plane directly above the bottom rectangle 1 (in the positive direction of the Z-axis). The center of this circle is usually on the Z-axis to ensure the symmetry of the model.

[0052] Then, execute S220 to construct the inclined plane boundary: Based on the known coal bunker diameter and taper angle, using the principles of spatial analytic geometry, the coordinates of the intersection points of the cylindrical surface and the four theoretical inclined planes can be calculated. Since the square outlet is usually rectangular, these four theoretical inclined planes are not perfectly symmetrical about the center. Then, connect the four sides of the bottom rectangle 1 with their respective intersection point coordinates. Specifically, connecting one long side of the bottom rectangle 1 with its corresponding intersection point yields a spatial line segment; connecting another long side with its corresponding intersection point yields another line segment; the same applies to the two short sides.

[0053] Next, execute S230 to generate the solid model: First, use the "Extrude" or "Stretch" tool to extend the bottom rectangle 1 along the negative Z-axis (downward) by a specified distance, forming a cuboid 4 (or cube 4). This part corresponds to the straight section below the square outlet of the coal bunker. Extend the top circle 2 along the negative Z-axis (downward) to form a cylinder 5, as shown below. Figure 2 (b) and Figure 2 As shown in (c). Next, the four inclined plane extension generatrices 3 obtained in S220 are extended along the direction of the bottom rectangle edge they connect to, until they intersect or connect with the cylinder 5, thereby generating four solid extended inclined planes 6, as shown in (c). Figure 2 (c) and Figure 2As shown in (d). It should be noted that for rectangular exits, the four extended ramps 6 constructed by this method satisfy an important geometric property: the angles between opposite extended ramps 6 and the horizontal plane are the same; while the angles between adjacent extended ramps 6 and the horizontal plane are different. Only when the rectangular exit is a square are the four extended ramps 6 completely identical, and the angles between opposite extended ramps 6 and the horizontal plane are also the same.

[0054] Finally, perform Boolean difference operation: select cylinder 5 and four extended inclined planes 6, and use the trimming tool to trim the excess parts of the coal bunker, thus obtaining a hollow "circle-to-square" transition section 3D solid model 7 with a circular top and square bottom cross-section, as shown below. Figure 2 As shown in (e).

[0055] Next, execute S300. (For example...) Figure 2 As shown in (f), on the three-dimensional solid model 7, two preset directions that pass through the center of the square exit and are perpendicular to each other are cut to generate and export the outline two-dimensional engineering drawings 8 of each cut surface. In this embodiment, the two preset directions are those that pass through the center of the square exit and are parallel to the two adjacent rectangular sides (such as one long side and one short side).

[0056] In practice, the 3D model can be adjusted to the front view and right view perspectives (these two view directions correspond to the two preset directions mentioned above). The model outline displayed on the screen at this time is the section outline in that direction. Then, using the software's export function, a 2D drawing file of the displayed outline is exported. This file is the 2D engineering drawing 8 containing the precise intersection line. In this embodiment, the intersection lines obtained from the two section directions are different.

[0057] To facilitate interaction with other CAD systems or CNC equipment, it is preferable to export the file in the universal DXF format. This step automates and precisely solves the most time-consuming problem in traditional design: drawing intersection lines. The generated DXF file can be directly used to draw construction drawings or guide on-site layout.

[0058] Finally, execute S400, select the target surface that constitutes the inner wall in the three-dimensional solid model 7, perform unfoldable surface operation, generate and export the planar unfolded diagram 9 of each target surface, as the blanking diagram of the wear-resistant steel plate at the corresponding position.

[0059] The purpose of this step is to generate the blanking diagram for the wear-resistant steel plate. For example... Figure 2As shown in (g), firstly, on the 3D solid model 7, select the target surfaces that constitute the inner wall where wear-resistant steel plates need to be laid. These target surfaces typically include three parts: the inner surface of the cylindrical region, the inner surface of the four inclined surface regions, and the inner surface of the cuboid region. Then, for each selected surface, perform the software's unfoldable surface operation (usually the "Unfold Surface" command in Rhino). The software will automatically calculate and "flatten" the 3D surface into a 2D planar shape, keeping its surface area and the actual length of the key boundaries unchanged. After generating the planar unfolded diagram 9, the planar shape characteristics of the wear-resistant steel plate are obtained. Export it as well, usually in DXF format. The wear-resistant steel plates are arranged in the cylindrical region of the silo with no reduction in radius, the four inclined surface regions, and the square opening solid shape region. Among them, the first two regions are difficult to draw. Using Rhino to unfold the surfaces and export them can solve the problem of drawing and processing the wear-resistant steel plates at the coal bunker's closing position.

[0060] Based on the same inventive concept, this invention also proposes a readable storage medium storing a computer program, which, when executed, can realize the above-mentioned method for 3D modeling of coal bunker closure and drawing the shape of wear-resistant steel plate.

[0061] A readable storage medium can be a tangible device capable of holding and storing instructions for use by an instruction execution device, such as, but not limited to, electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof. The computer programs described herein can be downloaded from the readable storage medium to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. Networks can include copper transmission cables, fiber optic transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. Each computing / processing device's network adapter card or network interface receives and forwards a computer program from the network for storage on a readable storage medium within the respective computing / processing device. The computer program used to perform the operations of this invention can be execution instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as "C" or similar languages. The computer program can execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuits, such as programmable logic circuits, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), are personalized by utilizing state information from a computer program. These electronic circuits can execute computer-readable program instructions, thereby realizing various aspects of the present invention.

[0062] Various aspects of the present invention are described herein with reference to flowchart illustrations and / or block diagrams of methods, systems, and computer program products according to embodiments of the invention. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by a computer program. These computer programs can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. These computer programs can also be stored in a readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the readable storage medium storing the computer program comprises an article of manufacture including instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams.

[0063] A computer program may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the computer program executing on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0064] Since the readable storage medium provided by this invention belongs to the same inventive concept as the above-described method for 3D modeling of coal bunker opening and drawing of wear-resistant steel plate shape, the readable storage medium provided by this invention has all the advantages of the above-described method for 3D modeling of coal bunker opening and drawing of wear-resistant steel plate shape. Therefore, the beneficial effects of the readable storage medium provided by this invention will not be described in detail here.

[0065] In summary, this invention provides a method for 3D modeling of coal bunker closures and drawing the shape of wear-resistant steel plates. Addressing the pain points of closure section design in coal bunkers, a 3D model of the closure is established, intersecting lines on different sections of the closure are derived, and irregular curved surfaces are unfolded to obtain the shape and dimensions of the wear-resistant steel plates lining the inner side of the bunker wall. This effectively transforms the abstract "round-to-square" spatial structure into an intuitive and accurate digital model, providing a simple method for drawing intersecting lines besides drafting, filling the gap in drawing wear-resistant steel plates at the closure of coal bunkers, providing feasible space for the segmented processing and customization of wear-resistant steel plates, reducing the difficulty of on-site installation, and effectively avoiding material waste.

[0066] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure are within the protection scope of the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the present invention and its equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A method for three-dimensional modeling of coal bunker openings and drawing the shape of wear-resistant steel plates, characterized in that, Includes the following steps: S100. Determine the closing parameters of the coal bunker based on the mine production conditions, and determine the size and position of the square outlet at the bottom of the coal bunker based on the coal feeder interface. The closing parameters include at least the coal bunker diameter and the closing angle. S200. Through 3D modeling, perform the following operations to generate a 3D solid model of the rounded-to-square transition section: S210. Draw the bottom rectangle and top circle according to the size and position of the square outlet and the closing parameters respectively; S220. Based on the diameter and closing angle of the coal bunker, calculate the coordinates of the intersection points between the top circle and each theoretical inclined plane; connect each side of the bottom rectangle with the corresponding intersection coordinates to determine the extension generatrix of each of the four theoretical inclined planes. S230. Extend the bottom rectangle and the top circle along the axial direction to form a cube and a cylinder, respectively. Extend the extension generatrix along the direction of the connected bottom rectangle side to obtain four extension slopes. Perform Boolean difference operation on the cylinder and the four extension slopes to obtain the three-dimensional solid model of the circle-to-square transition section. S300. On the three-dimensional solid model, cut along two preset directions that pass through the center of the square exit and are perpendicular to each other, and generate and export the outline two-dimensional engineering drawings of each cut surface. S400. Select the target surface that forms the inner wall in the three-dimensional solid model, perform unfoldable surface operation, generate and export the planar unfolded view of each target surface, and use it as the blanking view of the wear-resistant steel plate at the corresponding position.

2. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1, characterized in that, The mine production conditions include the overall mine technology and equipment level, roadway surrounding rock conditions, and mine production capacity; wherein, the mine technology and equipment level is characterized by the conveying capacity of the belt conveyors at the top and bottom of the coal bunker.

3. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1, characterized in that, The closing parameters also include the coal bunker closing method.

4. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1, characterized in that, Of the four inclined planes, the two opposite inclined planes have the same angle with the horizontal plane, while the two adjacent inclined planes have different angles with the horizontal plane.

5. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1, characterized in that, The two preset directions pass through the center of the square exit and are parallel to the two adjacent rectangular sides, respectively.

6. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1 or 5, characterized in that, Generating and exporting the two-dimensional engineering drawings of the outlines of each section plane specifically includes: placing the three-dimensional solid model in the front view and right view perspectives corresponding to the two preset directions, and exporting the two-dimensional drawing files of the displayed outlines.

7. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1, characterized in that, The target surface includes the inner surface of the cylindrical region, the inner surfaces of the four inclined regions, and the inner surface of the cuboid region in the three-dimensional solid model.

8. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1, characterized in that, 3D modeling was performed using Rhino software.

9. The method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to claim 1, characterized in that, The exported 2D outline engineering drawings and planar unfolded drawings are both in DXF format.

10. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it can realize the method for three-dimensional modeling of coal bunker closure and drawing of wear-resistant steel plate shape according to any one of claims 1-9.

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