A method for optimizing the layout of a single-layer three-dimensional warehouse in a nuclear power plant

Abstract

The application discloses a nuclear power plant single-layer stereoscopic warehouse site optimization layout method, relates to the technical field of warehouse logistics, and aims to solve the problems of limited number of warehouse sites and low space utilization rate of traditional plane warehouses. By dividing the warehouse into functional areas according to storage environment and operation process, and designing two kinds of stereoscopic storage areas of pallets and material boxes in the core storage area, the space utilization rate is improved by adopting multi-layer shelves and optimizing the width of the channel to adapt to the automatic access equipment.

Description

Technical Field

[0001] This invention relates to the field of warehousing and logistics technology, and in particular to a method for optimizing the layout of storage locations in a single-story automated warehouse for nuclear power plants. Background Technology

[0002] Nuclear power plant operation and maintenance require a wide variety of materials with complex specifications, including a large number of precision equipment sensitive to environmental conditions and conventional materials. These materials are usually stored in single-story warehouses, but due to fixed building structures (such as area, net height, floor load, and fire safety regulations), traditional warehouse layouts struggle to achieve efficient use of storage space. Currently, a flat warehouse layout is commonly used, with racking typically not exceeding five layers. Furthermore, to accommodate manual or forklift operations, a large number of aisles must be reserved, resulting in aisle area often exceeding 30%, severely compressing effective storage space and limiting the number of storage locations. With the expansion of nuclear power production and the increasing demand for material reserves, how to significantly improve storage density and operational efficiency within existing building conditions has become an urgent technical challenge.

[0003] To address the aforementioned issues, common improvements in existing technologies include introducing automated storage and retrieval systems (AS / RS), optimizing rack layout algorithms, and employing adjustable-height racks. For example, stacker cranes, shuttle vehicles (RGVs), or automated guided vehicles (AGVs) can be used to achieve high-level rack access, reducing manual operation aisles. Some research also optimizes location allocation and routing through simulation or mathematical programming to shorten access time and improve space utilization. Furthermore, some solutions attempt to combine different rack types to adapt to different material storage configurations.

[0004] However, existing technologies still have the following shortcomings: On the one hand, most automated storage and retrieval systems (AS / RS) solutions are designed for new warehouses and have poor adaptability to existing fixed buildings, making renovation and implementation difficult; on the other hand, although there are some high-rise racking designs, they do not take into account the classification and storage requirements of nuclear power materials, the differences in aisle dimensions and operating methods of different automated equipment, and the strict restrictions on partition area by fire safety regulations. As a result, when the solutions are actually implemented, they often cannot achieve a significant increase in the number of storage locations within a limited space, and there is still considerable room for improvement in the overall space utilization rate.

[0005] Therefore, there is an urgent need for a three-dimensional storage location optimization method for single-story nuclear power warehouses. This method should be able to achieve high-density utilization of storage space and a significant increase in the number of storage locations by reasonably zoning functional areas, selecting racks and designing aisles, and coordinating with various automated storage and retrieval equipment, while strictly adhering to building constraints and safety regulations. Summary of the Invention

[0006] This invention aims to solve the problems of low space utilization and insufficient storage capacity in single-story warehouses of nuclear power plants. Through scientific optimization of the warehouse layout, the storage capacity can be significantly increased without changing the main structure of the warehouse building. At the same time, it can be adapted to automated warehousing equipment to improve operational efficiency.

[0007] This invention provides a method for optimizing the layout of storage locations in a single-story automated warehouse for nuclear power plants, which specifically includes the following steps: S1. Collect and confirm the fixed building parameters of the warehouse, including at least the total building area, usable net height, ground bearing capacity and fire rating; S2. Based on the fixed building parameters, the total area of ​​the warehouse is divided into multiple functional storage sub-areas; S3. For at least one of the aforementioned functional storage sub-areas, design a three-dimensional racking layout scheme; the three-dimensional racking layout scheme includes: determining the type and standard specifications of the storage unit according to the storage function requirements, determining the number of racking layers according to the available net height and the specifications of the storage unit, selecting suitable automated storage and retrieval equipment according to the specifications of the storage unit and the number of racking layers, and determining the aisle width between rackings according to the operating parameters of the selected automated storage and retrieval equipment. S4. Based on the three-dimensional shelving layout scheme designed for each functional storage sub-area in step S3, calculate the total planned number of storage units in the warehouse.

[0008] Specifically, in step S2, the functional storage sub-area includes at least one three-dimensional storage area; the three-dimensional storage area includes at least one of a pallet three-dimensional storage area and a bin three-dimensional storage area.

[0009] Furthermore, step S2 also includes: Based on the storage environment requirements of the materials, the warehouse is divided into two isolated main storage areas. The main storage areas include a first-class storage area for storing materials with special environmental requirements and a second-class storage area for storing conventional materials. Within each of the main warehouse areas, the areas are divided into receiving and shipping areas, packaging areas, buffer zones, and core storage areas according to the work process, wherein the core storage area includes the three-dimensional storage area.

[0010] Specifically, in step S3, a three-dimensional shelving layout scheme is designed for the pallet three-dimensional storage area, including: Multi-layer beam shelving is used; The number of shelf layers is determined by dividing the available net height by the height of the pallet unit and rounding down. The width of the tunnel is determined based on the minimum turning radius and working space requirements of the selected first automated storage and retrieval device.

[0011] Furthermore, the first automated storage and retrieval device is one or more of a laser-guided AGV stacker forklift, stacker crane, or RGV shuttle; correspondingly, the aisle width is configured to adapt to the first automated storage and retrieval device.

[0012] Specifically, in step S3, a layout scheme for the three-dimensional shelving in the three-dimensional storage area of ​​the material bins is designed, including: A multi-level bin rack system is adopted; The number of shelf layers is determined by dividing the available net height by the height of the bin unit and rounding down, and the number of shelf layers is greater than the number of layers determined for the pallet three-dimensional storage area; The aisle width is determined based on the body width and operational requirements of the selected second automated storage and retrieval equipment, and the aisle width is less than the aisle width of the pallet-based automated storage area.

[0013] Furthermore, the second automated access device is a climbing robot; correspondingly, the lane width is configured to meet only the minimum size required for the climbing robot to operate.

[0014] Furthermore, step S3 also includes: in the three-dimensional shelving layout scheme, a safety back net is configured on the back of the shelving.

[0015] Furthermore, in the method for optimizing the layout of a single-story automated warehouse in a nuclear power plant, when designing the aisle width and shelving layout, it is necessary to ensure that the fire compartment area is within the limits required by the fire protection rating.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through scientific functional zoning and three-dimensional storage design, enables warehouse space utilization to reach many times that of traditional flat warehouses, significantly increasing storage capacity; at the same time, it is compatible with automated warehousing equipment, improving operational efficiency and reducing labor costs; the layout design complies with fire protection regulations and warehouse building parameter requirements, ensuring storage safety and operational compliance.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a method for optimizing the layout of storage locations in a single-story automated warehouse of a nuclear power plant, according to one embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of warehouse partitioning in one embodiment of the present invention.

[0021] Figure 3(a) is an elevation view of the pallet area shelf in a Class A warehouse according to an embodiment of the present invention.

[0022] Figure 3(b) is a side elevation view of the pallet area shelf in an embodiment of the present invention.

[0023] Figure 4(a) is an elevation view of the pallet area shelf in a Class B warehouse according to an embodiment of the present invention.

[0024] Figure 4(b) is a side elevation view of the pallet area shelf in a Class B warehouse according to an embodiment of the present invention.

[0025] Figure 5(a) is an elevation view of the Class A warehouse storage area shelf in one embodiment of the present invention.

[0026] Figure 5(b) is a side elevation view of the A-level warehouse storage bin area shelf in one embodiment of the present invention.

[0027] Figure 6(a) is an elevation view of the B-level warehouse storage area shelf in one embodiment of the present invention.

[0028] Figure 6(b) is a side elevation view of the B-level warehouse storage area shelf in one embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: In this embodiment, as Figure 1 As shown in the figure, this embodiment provides a method for optimizing the layout of storage locations in a single-story automated warehouse of a nuclear power plant, specifically including the following steps: Step S1: Collect and confirm the fixed building parameters of the warehouse, including at least the total building area, available net height, ground bearing capacity and fire resistance rating; Step S2: Based on the properties of the stored materials and the warehouse operation process, the overall warehouse layout is divided into several independent and functionally different sub-storage areas under the fixed building parameters of the warehouse. Step S3: Design an automated storage and retrieval system layout scheme for at least one of the sub-storage areas; the automated storage and retrieval system layout scheme includes: determining the type and standard specifications of the storage unit according to the storage function requirements, determining the number of shelf layers according to the available net height and the specifications of the storage unit, selecting suitable automated storage and retrieval equipment according to the specifications of the storage unit and the number of shelf layers, and determining the aisle width between the shelves according to the operating parameters of the selected automated storage and retrieval equipment. Step S4: Based on the three-dimensional shelving layout scheme designed for each functional storage sub-area in Step S3, calculate the total planned number of storage units in the warehouse.

[0031] Furthermore, in step S2 of this embodiment, the specific steps include: Step S201: Divide the warehouse into different main storage areas according to the storage environment conditions required for the materials; Step S202: Further divide the main warehouse storage area into functional sub-areas according to the warehouse operation process, including at least: within the main warehouse storage area, divide it into a receiving and shipping inspection area, a packaging processing area, a buffer zone for goods to be received / outbound, and a core storage area, specifically including: The receiving and shipping inspection area, located near the warehouse gate, is used for goods handover and preliminary inspection. The packaging processing area is used for packaging, breaking down, and palletizing / boxing goods. The waiting-to-enter / outbound buffer zone serves as a temporary storage area for automated equipment connections and is located near the entrance and exit of the storage area, respectively. The core storage area is divided into a "pallet-based three-dimensional storage area" and a "bin-based three-dimensional storage area" according to the material form. The core storage area includes at least one three-dimensional storage area, which includes at least one of the pallet-based three-dimensional storage area and the bin-based three-dimensional storage area.

[0032] Furthermore, in step S201, the main storage area, which is divided according to the storage environment conditions required for the materials, includes at least a first-class storage area for storing materials with special environmental requirements and a second-class storage area for storing conventional materials.

[0033] Furthermore, in step S3 of this embodiment, designing a three-dimensional shelving layout scheme for at least one of the sub-storage areas specifically includes: A layout scheme for a three-dimensional racking system is designed for the aforementioned pallet storage area, including: Multi-layer beam shelving is used; The number of shelf layers is determined by dividing the available net height by the height of the pallet unit and rounding down. The width of the tunnel is determined based on the minimum turning radius and working space requirements of the selected first automated storage and retrieval device.

[0034] Furthermore, the first automated storage and retrieval device is one or more of a laser-guided AGV stacker forklift, stacker crane, or RGV shuttle; correspondingly, the aisle width is configured to adapt to the first automated storage and retrieval device.

[0035] A layout scheme for a three-dimensional shelving system is designed for the aforementioned three-dimensional storage area for material bins, including: A multi-level bin rack system is adopted; The number of shelf layers is determined by dividing the available net height by the height of the bin unit and rounding down, and the number of shelf layers is greater than the number of layers determined for the pallet three-dimensional storage area; The aisle width is determined based on the body width and operational requirements of the selected second automated storage and retrieval equipment, and the aisle width is less than the aisle width of the pallet-based automated storage area.

[0036] Furthermore, the second automated access device is a climbing robot; correspondingly, the lane width is configured to meet only the minimum size required for the climbing robot to operate.

[0037] Furthermore, in this embodiment, step S3 also includes: in the three-dimensional shelving layout scheme, a safety back net is configured on the back of the shelving.

[0038] Furthermore, in this embodiment, when designing the aisle width and shelving layout, it is necessary to ensure that the fire compartment area is limited as required by the fire protection rating.

[0039] Example 2: In this embodiment, a building with a total area of Taking a single-story Class C warehouse as an example, the construction conditions of the single-story Class C warehouse are shown in Table 1 below: Table 1: Conditions for Establishing a Single-Story Class C Warehouse

[0040] Table 1 shows that the warehouse has a net height of ≥10m and a ground load of 5T / m², meeting the basic requirements for supporting high-rise shelving and heavy automated equipment. Power supply configuration and independent fiber optic cables ensure the power supply and high-speed data transmission needs of the automated equipment. The fire rating is Class C2, requiring fire compartments no larger than 1500㎡ to be divided according to regulations, which imposes clear limitations on the continuous layout of the warehouse area. Under the above fixed building conditions, traditional flat warehouse layouts are difficult to achieve high-density storage goals. Therefore, the method provided in this invention is applied to optimize the layout of automated warehouse storage locations. Specifically, it includes the following: Step 1: Warehouse space division and functional area setting.

[0041] Based on the storage environment requirements of the materials, the entire The single-story Class C warehouse is divided into two physically isolated main storage areas: Class A and Class B. The Class A storage area is used to store sensitive materials that have special requirements for environmental temperature, humidity, cleanliness, or safety; the Class B storage area is used to store conventional materials.

[0042] Each main database area is further divided into the following functional areas, such as... Figure 2 As shown, it includes: receiving and shipping and inspection area (near the warehouse door), packaging / fractionation area, buffer zone for materials to be put into storage and out of storage, and core storage area; among which, the core storage area is specifically divided into pallet storage area and bin storage area according to the form of materials, which is the core of space optimization in this embodiment.

[0043] Step 2: Perform three-dimensional layout and parameter design for the core storage area in each storage sub-area.

[0044] For the palletized automated storage area in the Class A warehouse, the specific automated layout and parameter design include: Layout and Selection: The pallet storage area in the Class A warehouse uses a 4-layer beam rack to store standard pallet units with a height of 1000mm. ); The design parameters are as follows: occupies approximately [area missing]. The rack height is designed to adapt to the warehouse net height (≥10 meters) and pallet unit height (1000mm). The aisle width is set at 4 meters, which is specifically designed to accommodate the minimum turning radius and operating space of the selected automated equipment—laser-guided AGV stacker forklifts. The total design capacity is 144 pallet positions. See Figure 3(a) Elevation of the pallet racking in the Class A warehouse and Figure 3(b) Side Elevation of the pallet racking in the Class A warehouse for details. Figure 3(a) Elevation of the pallet racking in the Class A warehouse and Figure 3(b) Side Elevation of the pallet racking in the Class A warehouse visually demonstrate the structure of the 4-layer beam racking, the layer spacing, and the relative spatial relationship with the 4-meter-wide aisle (AGV operating area).

[0045] For the palletized automated storage area in the Class B warehouse area, the specific automated layout and parameter design include: In terms of layout and selection, the pallet storage area in the Class B warehouse uses an 8-layer beam rack to store pallet units of two different heights (650mm and 1000mm), which significantly improves storage density. The design parameters are as follows: occupies approximately [area missing]. The entire back of the racks is equipped with a safety net at the same height as the racks to ensure safety during high-altitude storage operations. The aisle width is also set at 4 meters to accommodate more efficient automated storage and retrieval systems, such as stacker cranes and RGV shuttle systems. Total designed storage capacity: 2712. Figure 4(a) elevation view of the pallet area racks in the Class B warehouse and Figure 4(b) side elevation view of the pallet area racks in the Class B warehouse clearly depict the dense layout of the 8-layer racks in this area, the installation location of the safety net, and how the 4-meter aisle width meets the operational requirements of heavy equipment such as stacker cranes.

[0046] For the three-dimensional storage area of ​​the material bins in the Class A warehouse, the specific three-dimensional layout and parameter design include: Layout and Selection: The Class A warehouse's automated storage area utilizes ultra-high-density 21-layer beam racks to store storage bin units ( ); The design parameters are approximately [area] [area] The aisle width is compressed to a mere 0.9 meters, just enough to meet the operational requirements of climbing robots, greatly saving floor space. The total designed storage capacity is 23,373 units. As shown in Figures 5(a) and 5(b), Figure 5(a) shows the elevation of the Class A warehouse storage bin area shelving and Figure 5(b) shows the side elevation of the Class A warehouse storage bin area shelving, demonstrating the extremely high utilization rate and compact layout of the shelving in the vertical direction (21 layers). With an aisle width of only 0.9 meters, it perfectly embodies the concept of high-density storage.

[0047] For the three-dimensional storage area of ​​the material bins in the Class B warehouse area, the specific three-dimensional layout and parameter design include: In terms of layout and selection, the B-level warehouse area uses the same 21-layer single-sided guide rail rack with optimized structure to store standard bin units. The design parameters are approximately [area] [area] The back of the shelving is equipped with a safety net at the same height as the shelving to ensure operational safety; the aisle width is 0.9 meters, suitable for small storage and retrieval equipment such as climbing robots. Total designed storage capacity: 22,680 units. As shown in Figures 6(a) and 6(b), Figure 6(a) shows the elevation view of the Class B warehouse storage bin area shelving and Figure 6(b) shows the side elevation view of the Class B warehouse storage bin area shelving, illustrating the form of the single-sided guide rail shelving in a specific layout and its spatial arrangement with the 0.9-meter narrow aisle.

[0048] This embodiment uses the method provided by the present invention to calculate the total. The single-story warehouse has undergone a three-dimensional transformation and optimization. The total number of storage locations for the overall planned three-dimensional warehouse is shown in Table 2: Warehouse Space Design Comparison Table; the overall space utilization rate of the planned three-dimensional warehouse is shown in Table 3: Space Utilization Rate Comparison Table.

[0049] Table 2: Comparison of Warehouse Space Designs

[0050]

[0051] Table 2 provides a quantitative summary: Grade A warehouse has 144 pallet areas and 23,373 bin areas; Grade B warehouse has 2,712 pallet areas and 22,680 bin areas, totaling over 49,000.

[0052] Table 3: Comparison of Space Utilization Rates

[0053]

[0054] As shown in Table 3, a comparison of space utilization, compared to the traditional five-story flat warehouse layout (approximately 10,700 storage spaces), the method of this invention increases the total number of storage spaces by nearly four times within the same floor area, achieving a space utilization rate more than 3.6 times that of traditional flat warehouses, thus verifying the significant technical effectiveness of this method. The entire design process strictly adhered to the building fire protection code's restrictions on zoning area and made full use of the warehouse's building parameters (net height, load capacity) and energy and communication infrastructure.

[0055] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for optimizing the layout of storage locations in a single-story automated warehouse for nuclear power plants, characterized in that, include: S1. Collect and confirm the fixed building parameters of the warehouse, including at least the total building area, usable net height, ground bearing capacity and fire resistance rating; S2. Based on the fixed building parameters, the total area of ​​the warehouse is divided into multiple functional storage sub-areas; S3. Design a three-dimensional shelving layout scheme for at least one of the aforementioned functional storage sub-areas; The automated racking layout scheme includes: determining the type and standard dimensions of the storage unit according to the storage function requirements; determining the number of rack layers according to the available net height and the specifications of the storage unit; selecting suitable automated storage and retrieval equipment according to the specifications of the storage unit and the number of rack layers; and determining the aisle width between racks according to the operating parameters of the selected automated storage and retrieval equipment. S4. Based on the three-dimensional shelving layout scheme designed for each functional storage sub-area in step S3, calculate the total planned number of storage units in the warehouse.

2. The method for optimizing the layout of storage locations in a single-story automated warehouse in a nuclear power plant as described in claim 1, characterized in that, In step S2, the functional storage sub-area includes at least one three-dimensional storage area.

3. The method for optimizing the layout of storage locations in a single-story automated warehouse in a nuclear power plant as described in claim 2, characterized in that, The three-dimensional storage area includes at least one of a pallet three-dimensional storage area and a bin three-dimensional storage area.

4. The method for optimizing the layout of storage locations in a single-story automated warehouse in a nuclear power plant as described in claim 3, characterized in that, In step S3, a layout scheme for the automated storage and retrieval system (AS / RS) is designed for the pallet AS / RS storage area, including: Multi-layer beam shelving is used; The number of shelf layers is determined by dividing the available net height by the height of the pallet unit and rounding down. The width of the tunnel is determined based on the minimum turning radius and working space requirements of the selected first automated storage and retrieval device.

5. The method for optimizing the layout of storage locations in a single-story automated warehouse in a nuclear power plant as described in claim 4, characterized in that: The first automated storage and retrieval device is one or more of a laser-guided AGV stacker forklift, stacker crane, or RGV shuttle; correspondingly, the aisle width is configured to adapt to the first automated storage and retrieval device.

6. The method for optimizing the layout of storage locations in a single-story automated warehouse of a nuclear power plant as described in claim 3, characterized in that, In step S3, a layout scheme for the three-dimensional shelving is designed for the three-dimensional storage area of ​​the material bins, including: A multi-level bin rack system is adopted; The number of shelf layers is determined by dividing the available net height by the height of the bin unit and rounding down, and the number of shelf layers is greater than the number of layers determined for the pallet three-dimensional storage area; The aisle width is determined based on the body width and operational requirements of the selected second automated storage and retrieval equipment, and the aisle width is less than the aisle width of the pallet-based automated storage area.

7. The method for optimizing the layout of storage locations in a single-story automated warehouse of a nuclear power plant as described in claim 6, characterized in that, The second automated access device is a climbing robot; correspondingly, the width of the alleyway is configured to be the minimum size that only meets the operation requirements of the climbing robot.

8. The method for optimizing the layout of storage locations in a single-story automated warehouse of a nuclear power plant as described in claim 1, characterized in that, Step S2 also includes: Based on the storage environment requirements of the materials, the warehouse is divided into two isolated main storage areas. The main storage areas include a first-class storage area for storing materials with special environmental requirements and a second-class storage area for storing conventional materials. Within each of the main warehouse areas, the areas are divided into receiving and shipping areas, packaging areas, buffer zones, and core storage areas according to the work process, wherein the core storage area includes the three-dimensional storage area.

9. A method for optimizing the layout of storage locations in a single-story automated warehouse for nuclear power plants as described in any one of claims 1 to 8, characterized in that, Step S3 further includes: in the three-dimensional rack layout scheme, a safety back net is configured on the back of the rack.

10. A method for optimizing the layout of storage locations in a single-story automated warehouse for nuclear power plants as described in any one of claims 1 to 8, characterized in that, When designing the aisle width and shelving layout, it is necessary to ensure that the fire compartment area is within the limits required by the fire rating.

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