Method for lifting, dismounting, transporting and installing a nuclear power temporary transport platform as a whole

Abstract

The present application is suitable for the field of transportation technology improvement, and provides a nuclear power temporary transfer platform overall jacking, dismounting, transporting and installing method. The temporary transfer platform is integrally jacked, dismounted from the installation base, integrally transported, integrally lowered and installed on another installation base by using the combination characteristics and self-lifting function of the self-propelled module transport vehicle and the appropriate steel column support. The problem of long working period caused by dismounting, transferring and re-installing the temporary transfer platform is solved, and the construction efficiency can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of transportation technology improvement, and in particular relates to a method for the overall lifting, dismantling, transportation and installation of a temporary transfer platform for nuclear power plants. Background Technology

[0002] In the nuclear power industry, the dismantling and installation of temporary transfer platforms between two units involves disassembling components such as cable trays, main beams, and portal legs, then hoisting and transporting these components to the other unit for hoisting and assembly into a complete temporary transfer platform. This dismantling and installation requires large lifting machinery and the erection of large auxiliary construction platforms. It occupies a large work area, has a long construction period, and is inefficient.

[0003] Self-propelled modular transport vehicles can be combined according to actual needs to meet the transportation requirements of ultra-large equipment components of different sizes and weights. They are characterized by flexible driving and steering, and simple operation, and are suitable for on-site transfer operations of ultra-large heavy equipment. The lifting function of the self-propelled modular transport vehicle meets the needs of dismantling steel structures from the base and installing them in place.

[0004] The existing technical solution for temporary transfer platforms adopts a disassembly-style dismantling method, which involves dismantling the temporary transfer platform into components such as the cable tray structure, three sets of gantry legs and their track accessories, and then dismantling, transporting, assembling / hoisting them into a whole.

[0005] The temporary transfer platform requires dismantling, hoisting, transporting, and assembling into components for hoisting, necessitating the use of auxiliary construction machinery and measures. The entire dismantling, transportation, and installation process takes approximately 2.5 months, which is time-consuming; on-site construction time is also lengthy, and there is significant overlap and impact with other disciplines. Summary of the Invention

[0006] The purpose of this invention is to provide a method for the overall lifting, dismantling, transportation, and installation of a temporary transfer platform for nuclear power plants. The temporary transfer platform is a large nuclear island equipment hoisting and transportation facility shared by multiple units. It needs to be dismantled, transported, and installed between two units, and the dismantling and installation period is relatively long. The method for the overall lifting, dismantling, transportation, and installation of the temporary transfer platform can significantly shorten the dismantling and installation period, and aims to solve the technical problem of the time interval between the sharing of temporary transfer platforms between two units.

[0007] This invention is implemented as follows: a method for the overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform, comprising the following steps:

[0008] S1. Transport the lower and middle sections of the supporting column to the temporary transfer platform and arrange them in an upright position next to the legs of the temporary transfer platform.

[0009] S2. Place the self-propelled modular transport vehicle in the temporary transfer platform, and install the assembled lower and middle sections of the load-bearing columns onto the self-propelled modular transport vehicle;

[0010] S3. Place the upper section of the load-bearing column and the load-bearing beam in the temporary transfer platform, and install the upper section of the load-bearing column on the middle section of the load-bearing column.

[0011] S4. Move the self-propelled modular transport vehicle to the loading position to align the load-bearing beam with the lifting and stress point of the temporary transfer platform;

[0012] S5. Reinforce the two sets of self-propelled modular transport vehicles by installing tie rods;

[0013] S6. Utilize the lifting / lowering function of the self-propelled modular transport vehicle to fill the height difference between the load-bearing columns and load-bearing beams at the load-bearing points of the temporary transfer platform, thereby achieving lifting and loading.

[0014] S7. Install limiting devices at both ends of the load-bearing beam to limit and fix the temporary transfer platform;

[0015] S8. After the temporary transfer platform is lifted under load, the outriggers separate from the foundation. The temporary transfer platform and the self-propelled modular transport vehicle form a whole and transport the temporary transfer platform to the installation position. The temporary transfer platform is then lowered onto the installation base to complete the installation.

[0016] A further technical solution of the present invention is: in step S1, the lower and middle sections of the supporting column are transported into the temporary transfer platform by a forklift in a lying position, and the lower and middle sections of the supporting column are lifted and turned into an upright position by a truck crane.

[0017] A further technical solution of the present invention is: in step S2, a truck crane is used to carry the lower and middle sections of the column and load the self-propelled modular transport vehicle together.

[0018] A further technical solution of the present invention is: in step S3, the upper section of the supporting column and the supporting beam are transported to the temporary transfer platform by forklift and then loaded onto the middle section and the upper section of the supporting column in sequence by truck crane.

[0019] A further technical solution of the present invention is: in step S5, the two sets of self-propelled modular transport vehicles are laterally reinforced by installing tie rods.

[0020] A further technical solution of the present invention is: in step S7, the temporary transfer platform is laterally limited and fixed by installing limiting devices at both ends of the bearing beam.

[0021] A further technical solution of the present invention is that the erection height of the supporting column is 12-13m.

[0022] A further technical solution of the present invention is that the erection height of the supporting column is 12.5m.

[0023] The beneficial effects of this invention are: a support structure is erected on a self-propelled modular transport vehicle. The support structure consists of a support column, a support beam, and a limiting device. The support structure supports and lifts the temporary transfer platform inside the temporary transfer platform, realizing the overall dismantling, loading, transportation, and installation of the temporary transfer platform. By applying the overall transportation technology of the temporary transfer platform, the problem of long construction period due to the dismantling, relocation, and reinstallation of the temporary transfer platform can be solved, and construction efficiency can be effectively improved. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the transport loading and assembly provided in an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the load-bearing column and self-propelled modular transport vehicle entering the temporary transfer platform according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the hoisting support column and support beam provided in an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram showing the lower section of the support pillar and the self-propelled modular transport vehicle placed below the temporary transfer platform, as provided in an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the load-bearing support column and load-bearing beam being connected on a self-propelled modular transport vehicle according to an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the installation limiting device provided in an embodiment of the present invention. Implementation

[0030] Figure reference numerals: 10-Temporary transfer platform; 20-Self-propelled modular transport vehicle; 30-Tie rod; 40-Bearing column; 50-Bearing beam; 60-Limiting device; 70-Forklift; 80-Truck crane; 401-Lower section of bearing column; 402-Middle section of bearing column; 403-Upper section of bearing column

[0031] like Figure 1 As shown, the method for overall lifting, dismantling, transportation, and installation of the temporary nuclear power transfer platform provided by the present invention is described in detail below:

[0032] This method utilizes the combination characteristics and self-lifting function of self-propelled modular transport vehicles, as well as suitable steel column support, to lift, dismantle, transport, and lower the temporary transfer platform as a whole from the installation base to another installation base.

[0033] The temporary transfer platform 10 is completely removed from the base and loaded as a whole by the support structure consisting of the support column 40 and the support beam 50, in conjunction with the lifting / lowering function of the self-propelled modular transport vehicle 20. After loading, the temporary transfer platform 10 is transported as a whole by the self-propelled modular transport vehicle 20. After the entire platform is transported to its position, the temporary transfer platform 10 is positioned and installed on the base by the support structure consisting of the support column 40 and the support beam 50, in conjunction with the lifting / lowering function of the self-propelled modular transport vehicle 20.

[0034] The overall lifting, dismantling, transportation, and installation method includes a self-propelled modular transport vehicle 20, supporting columns 40, supporting beams 50, and a limiting device 60. The self-propelled modular transport vehicle 20 is the main transport machinery for the temporary transfer platform 10. It employs a hydraulic suspension structure, consisting of a suspension frame, a balance arm, and suspension cylinders. Based on the lifting and lowering function of the hydraulic suspension cylinders, the entire temporary transfer platform 10 can be dismantled and loaded. The supporting structure consists of supporting columns, supporting beams, and a limiting device. Because the support points of the temporary transfer platform 10 are its internal main beams, the supporting structure needs to be erected inside the platform, avoiding the outriggers of the steel structure. The supporting columns 40 are bolted together, with a total column height of 12.5m. The supporting columns 40 are also bolted to the supporting beams 50. The top ends of the supporting beams 50 contact the two main beams of the temporary transfer platform, ensuring that the supporting beams 50 are aligned with the stiffening plates of the main beams of the temporary transfer platform. Limiting devices 60 are installed at both ends of the top surface of the supporting beam 50 to constrain and fix the main beam of the temporary transfer platform 10. The spacing is adjusted by rotating bolts, and the function of limiting and fixing is achieved after tightening the bolts. The overall movement and steering can be synchronously controlled by any cluster combination of self-propelled modular transport vehicles 20.

[0035] The loading method is based on the lifting / lowering function of the self-propelled modular transport vehicle 20. Lifting loading can be achieved simply by filling the height gap between the support point and the vehicle platform through the support structure.

[0036] The supporting structure consists of a supporting column 40, a supporting beam 50, and a limiting device 60. The supporting structure is erected inside the temporary transfer platform 10 to provide overall support for the temporary transfer platform 10.

[0037] Step S1: Transport the lower section 401 and the middle section 402 of the supporting column to the temporary transfer platform 10, and arrange them upright next to the legs of the temporary transfer platform 10; use a forklift 70 to move the lower section 401 and the middle section 402 of the supporting column into the temporary transfer platform 10 in a horizontal position, as shown. Figure 2As shown. Two truck cranes 80 are used to lift and turn the supporting column 40 to an upright position, placing it next to the legs of the temporary transfer platform 10, so that the self-propelled modular transport vehicle 20 has sufficient space to enter the interior of the temporary transfer platform 10, as shown. Figure 3 , 4 As shown.

[0038] Step S2: Place the self-propelled modular transport vehicle 20 in the temporary transfer platform 10, and install the assembled lower section 401 and middle section 402 of the support column on the self-propelled modular transport vehicle 20; use a truck crane 80 to assemble the lower section 401 and middle section 402 of the support column onto the self-propelled modular transport vehicle 20 in sequence, and connect them together.

[0039] Step S3: Place the upper section 403 of the supporting column and the supporting beam 50 inside the temporary transfer platform 10. Mount the upper section 403 onto the middle section 402 of the supporting column, and load the supporting beam 50 onto the upper section 403. Use a forklift 70 to transport the upper section 403 and the supporting beam 50 into the temporary transfer platform 10. Then, use a truck crane 80 to sequentially assemble the upper section 403 and the supporting beam 50 onto the supporting column 40. Figure 5 As shown

[0040] Step S4: Move the self-propelled modular transport vehicle 20 to the loading position so that the supporting beam 50 is aligned with the lifting force point of the temporary transfer platform 10; after the supporting column 40 and the supporting beam 50 are assembled, move the self-propelled modular transport vehicle 20 to the loading position so that the supporting beam 50 is aligned with the lifting force point of the temporary transfer platform 10. The self-propelled modular transport vehicle 20 is now aligned.

[0041] Step S5: Install tie rods 30 between the two sets of self-propelled modular transport vehicles 20 for reinforcement; the tie rods 30 are installed between the two sets of self-propelled modular transport vehicles 20 to provide lateral reinforcement.

[0042] Step S6: Using the lifting / lowering function of the self-propelled modular transport vehicle 20, the supporting columns 40 and supporting beams 50 are used to fill the height difference of the bearing points of the temporary transfer platform 10 to achieve lifting and loading; the lifting bearing point of the temporary transfer platform 10 is 16m above the ground; by using the lifting / lowering function of the self-propelled modular transport vehicle 20, the supporting columns 40 and supporting beams 50 are used to fill the height difference of the bearing points of the temporary transfer platform, and the overall lifting and loading of the temporary transfer platform 10 is completed.

[0043] Step S7: Install limiting devices 60 at both ends of the bearing beam 50 to limit and fix the temporary transfer platform 10; after the temporary transfer platform 10 is lifted and loaded by the self-propelled modular transport vehicle 20, install a set of limiting devices 60 at each end of the bearing beam 50; the limiting devices 60 are installed on both ends of the bearing beam 50 by bolt connection, and the temporary transfer platform 10 is laterally limited and fixed by adjusting the extension of the transverse bolts on the limiting devices 60 and tightening the bolts. Figure 6 As shown.

[0044] In step S8, after the temporary transfer platform 10 is lifted under load, the platform legs separate from the foundation, making the entire temporary transfer platform 10 and the transport vehicle group a whole. The excellent load-bearing capacity and flexible steering performance of the self-propelled modular transport vehicle 20 are used to complete the overall transportation of the temporary transfer platform 10. The temporary transfer platform 10 is lifted and transported to the installation position. Using the lifting / lowering function of the self-propelled modular transport vehicle 20, as well as its flexible steering and movement, the temporary transfer platform 10 is lowered onto the installation base, completing the installation.

[0045] Load stability analysis:

[0046] The distance between the support edge of the platform's center of gravity in the direction perpendicular to the transport direction is half the length of the column base installed on the self-propelled modular transport vehicle 20, i.e., S1=5000mm / 2=2500mm; the center distance between the two sets of vehicle platforms is 9000mm, so S2=9000 / 2=4500mm.

[0047] In the vertical direction, the relationship between the platform's center of gravity and the self-propelled modular transport vehicle 20 is as follows:

[0048] h1 – The distance from the platform's center of gravity to the platform of the self-propelled modular transport vehicle 20 is 10923mm.

[0049] h2 — The normal driving height of the self-propelled modular transport vehicle 20 is 1500mm;

[0050] h3—the distance from the center of wheel rolling to the ground, 435mm;

[0051] h — the distance from the platform's center of gravity to the center of the wheel's rolling motion;

[0052] We can calculate that: h = h1 + h2 - h3 = 10923 + 1500 - 435 = 11988 (mm);

[0053] Where: S1=2500mm, S2=4500mm; the maximum longitudinal and transverse slopes of the transport road are set at 2°;

[0054] It can be calculated that:

[0055] Transportation direction: θ1=artan(s1 / h)-2°=artan(2500 / 11988)-2°=9.79°>7° (overturning angle designed for self-propelled modular transport vehicle 20);

[0056] Lateral direction: θ2=artan(s2 / h)-2°=artan(4500 / 11988)-2°=18.57°>7° (overturning angle designed for the self-propelled modular transporter 20);

[0057] Therefore, the platform's transportation stability is safe.

[0058] The temporary transfer platform is transported as a whole by mounting a support structure on the platform of a self-propelled modular transport vehicle 20. The platform's outriggers are then separated from the foundation using the vehicle's lifting function, allowing the entire platform to be loaded and transported to its designated location. This eliminates the need for disassembly and segmented transport, significantly improving construction efficiency. Furthermore, the self-propelled modular transport vehicle 20 boasts excellent transport performance, offering multiple travel modes and flexible adjustment of the platform's level, thus enhancing transport stability.

[0059] The original dismantling, hoisting, transportation, and installation plan had a construction period of 65 days. By implementing the method described in this application, the workload of dismantling and installation is greatly reduced, shortening the dismantling, transportation, and installation period to 15 days, saving approximately 50 days of construction time.

[0060] The significant reduction in workload and auxiliary tools results in considerable overall economic benefits.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for the overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform, characterized in that: The method for the overall lifting, dismantling, transportation, and installation of the temporary nuclear power transfer platform includes the following steps: S1. Transport the lower and middle sections of the supporting column to the temporary transfer platform and arrange them in an upright position next to the legs of the temporary transfer platform. S2. Place the self-propelled modular transport vehicle in the temporary transfer platform, and install the assembled lower and middle sections of the load-bearing columns onto the self-propelled modular transport vehicle; S3. Place the upper section of the load-bearing column and the load-bearing beam in the temporary transfer platform, and install the upper section of the load-bearing column on the middle section of the load-bearing column. S4. Move the self-propelled modular transport vehicle to the loading position to align the load-bearing beam with the lifting and stress point of the temporary transfer platform; S5. Reinforce the two sets of self-propelled modular transport vehicles by installing tie rods; S6. Utilize the lifting / lowering function of the self-propelled modular transport vehicle to fill the height difference between the load-bearing columns and load-bearing beams at the load-bearing points of the temporary transfer platform, thereby achieving lifting and loading. S7. Install limiting devices at both ends of the load-bearing beam to limit and fix the temporary transfer platform; S8. After the temporary transfer platform is lifted by force, the outriggers separate from the foundation. The temporary transfer platform and the self-propelled modular transport vehicle form a whole and complete the overall transportation of the temporary transfer platform to the installation position. The temporary transfer platform is then lowered onto the installation base to complete the installation. In step S1, the lower and middle sections of the supporting column are transported into the temporary transfer platform by a forklift in a horizontal position, and then the lower and middle sections of the supporting column are lifted and turned into an upright position by a truck crane.

2. The method for overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform according to claim 1, characterized in that, In step S2, a truck crane is used to carry the lower and middle sections of the column and load the self-propelled modular transport vehicle together.

3. The method for overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform according to claim 2, characterized in that, In step S3, the upper section of the supporting column and the supporting beam are transported to the temporary transfer platform by forklift and then loaded onto the middle section and upper section of the supporting column in sequence by truck crane.

4. The method for overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform according to claim 3, characterized in that, In step S5, tie rods are installed to reinforce the two sets of self-propelled modular transport vehicles laterally.

5. The method for overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform according to claim 4, characterized in that, In step S7, the temporary transfer platform is laterally limited and fixed by installing limiting devices at both ends of the load-bearing beam.

6. The method for overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform according to claim 5, characterized in that, The supporting columns are erected at a height of 12-13m.

7. The method for overall lifting, dismantling, transportation, and installation of a temporary nuclear power plant transfer platform according to claim 6, characterized in that, The supporting column is erected at a height of 12.5m.

Images