Vertical transportation tool for construction items in nuclear island plant elevator shaft and installation method

Abstract

The invention belongs to a transportation tool and an installation method, and particularly relates to a vertical transportation tool for construction items in a nuclear island plant elevator shaft. The vertical transportation tool for the construction items in the nuclear island plant elevator shaft comprises a top supporting cross beam, a #-shaped maintenance platform frame is arranged below the top supporting cross beam, a lifting device is arranged between the top supporting cross beam and the #-shaped maintenance platform frame, and a lifting cage is arranged at the lowest end of the lifting device. The tool has the remarkable effects that the tool is used for transporting the installation items in the nuclear island plant, and compared with a traditional manual transportation method, the work efficiency of item transportation in the nuclear island construction period is improved, and manpower input is reduced.

Description

Technical Field

[0001] This invention pertains to transportation fixtures and installation methods, specifically relating to a vertical transportation fixture for construction items within the elevator shaft of a nuclear island plant. Background Technology

[0002] The nuclear island building of a nuclear power plant contains a large number of equipment distributed in rooms at different elevations. During the installation and construction of the nuclear island, a large number of installation items need to be transported to designated locations. Since elevators cannot be installed in the elevator shafts during the electromechanical construction of the nuclear island, manual handling of installation items presents challenges such as difficulty in vertical transportation, high labor intensity, and low construction efficiency. In order to solve these problems, it is necessary to design and manufacture an electrified, safe, reliable, and efficient vertical transportation tooling for installation items. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a vertical transportation tool for construction items within the elevator shaft of a nuclear power plant's nuclear island building.

[0004] The present invention is implemented as follows: a vertical transport fixture for construction items in the elevator shaft of a nuclear island building of a nuclear power plant, comprising a top support cross beam, a grid-shaped maintenance platform frame set below the top support cross beam, a lifting device set between the top support cross beam and the grid-shaped maintenance platform frame, and a hoisting cage set at the bottom of the lifting device.

[0005] The vertical transport equipment for construction items in the elevator shaft of the nuclear island building of a nuclear power plant, as described above, also includes a fall arrestor. One end of the fall arrestor is connected to the top support cross beam, and the other end is connected to the cage.

[0006] The above-mentioned vertical transport equipment for construction items in the elevator shaft of the nuclear island building of a nuclear power plant includes a cage that is welded and assembled from materials such as H-beams, channel steel, steel plates, and round pipes.

[0007] A method for installing a vertical transport fixture for construction items in the elevator shaft of a nuclear island building of a nuclear power plant, comprising the following steps:

[0008] Step 1: Prefabrication;

[0009] Step 2: Installation;

[0010] Step 3: Connect;

[0011] Step 4: Debugging.

[0012] The installation method for vertical transportation fixtures for construction items in the elevator shaft of a nuclear power plant's nuclear island building, as described above, includes the following steps in step one:

[0013] Prefabricated embedded parts, prefabricated top support components, prefabricated maintenance platform components, and prefabricated cage components are manufactured according to their inherent characteristics.

[0014] The installation method for vertical transportation fixtures for construction items in the elevator shaft of a nuclear power plant's nuclear island building, as described above, includes the following steps in step two:

[0015] Follow the installation steps below in sequence.

[0016] Install the embedded plate;

[0017] Install welding and maintenance platform;

[0018] Install and weld the top support, dismantle the scaffolding below the support structure, and fabricate and install the hoist cage;

[0019] Install a chain electric hoist and a fall arrestor.

[0020] The installation method for vertical transportation equipment of construction items in the elevator shaft of a nuclear island building of a nuclear power plant, as described above, includes the following in step three:

[0021] The electric hoist, fall arrestor, and cage are connected.

[0022] The installation method for vertical transportation fixtures for construction items in the elevator shaft of a nuclear power plant's nuclear island building, as described above, includes the following steps in step four:

[0023] After debugging and load testing, if the requirements are met, the device is put into use; if the requirements are not met, the connection relationship is adjusted and the load test is carried out again until the requirements are met.

[0024] The significant advantage of this invention is that, by using the tooling of this invention to transport items within the nuclear island plant, compared with traditional manual transportation methods, the efficiency of item transportation during nuclear island construction is improved and the manpower input is reduced. Attached Figure Description

[0025] Figure 1 3D diagram of vertical transport equipment in elevator shaft.

[0026] Figure 2 Tooling component installation flowchart.

[0027] Figure 3 Layout diagram of the tooling for the UCB (Unified Plant) building in the nuclear island of a nuclear power plant.

[0028] In the diagram: 1-Top support cross beam, 2-Well-shaped maintenance platform frame, 3-Lifting device, 4-Fall arrestor, 5-Cage. Detailed Implementation

[0029] A vertical transport tooling for construction items within the elevator shaft of a nuclear power plant's nuclear island building:

[0030] (1) The top support cross beam, the grid-shaped maintenance platform frame, and the hoisting cage of this fixture are non-standard parts, which are welded and assembled from materials such as H-beams, channel steel, steel plates, and round pipes. In order to ensure the safety and reliability of the parts, the material model and specifications are determined according to the technical parameters such as the hoisting construction progress, height, hoisting load, and internal dimensions of the elevator shaft. Before the determination, all parts should be checked for strength and deformation using relevant material mechanics formulas and ANSYS software. The strength and deformation should meet the requirements of relevant national safety specifications and standards.

[0031] (2) The lifting device and fall arrestor of this tooling are standard parts, produced by manufacturers with manufacturing qualifications in the market. The specifications and models are determined according to the technical parameters such as the hoisting construction height, hoisting load, and internal dimensions of the elevator shaft, as well as the product samples of the manufacturer. The chain electric hoist has position limit, load limit, manual and wireless remote control control system.

[0032] For detailed installation procedures of tooling components, please refer to Figure 2

[0033] Tooling Innovation Points

[0034] (1) The top support cross beam and grid-shaped maintenance platform frame of this tooling design solve the problem that the elevator cannot be installed when the elevator shaft top machine room is not under construction during the construction period, and ensure the construction progress requirements of the construction items in the nuclear island plant.

[0035] (2) This tooling selects a suitable electric chain hoist lifting device and a suitable anti-fall safety device to improve the efficiency and safety of the construction of the nuclear island plant construction items transportation operation.

[0036] (3) All components of this fixture should be checked for strength and deformation using relevant formulas of mechanics of materials and ANSYS software. A control system that meets the construction requirements should be adopted. Compared with similar elevators, the cost of manufacturing is low, thus reducing construction costs.

[0037] (4) Based on the actual construction situation and construction progress requirements, this tooling conducts in-depth construction logic analysis and formulates a reasonable, executable construction process that meets the requirements of civil engineering and installation progress.

[0038] The advantages of the tooling of this invention are:

[0039] (1) Using a chain electric hoist as a vertical transport tool 3-lifting device, compared with a wire rope winch, the chain electric hoist is smaller in size and easier to install / disassemble.

[0040] (2) Based on a comprehensive analysis and consideration of the actual construction period of the civil engineering structure and the introduction time of equipment and installation items, a cross-shaped support beam is designed to ensure that civil engineering and installation construction can be carried out simultaneously without interfering with each other.

[0041] (3) Install 4-fall protection devices to improve the overall safety of the tooling.

[0042] (4)5-Rollers are installed on the side of the cage to prevent the corners of the cage from hitting the elevator shaft wall.

[0043] (5) Simple structure and low cost.

[0044] (6) Compared with manual lifting, it is more efficient.

[0045] (7) Shortening the construction period of on-site construction items is the main technical measure to achieve the nuclear island installation schedule target.

[0046] (8) Reduces labor intensity and personnel input, resulting in significant economic benefits.

[0047] The tooling of this invention has been applied effectively in the UCB, UKA, and UKC buildings of VVER reactor-type nuclear islands, significantly improving the efficiency of material transportation during nuclear island construction, reducing manpower input, and greatly reducing the labor intensity of transportation workers.

[0048] The application benefits of the tooling of this invention

[0049] The tooling of this invention is used for transporting installation items within the nuclear island plant. Compared with traditional manual transportation methods, it improves the efficiency of item transportation during nuclear island construction and reduces manpower input. Specific benefit indicators are as follows:

[0050] 1. Single vertical transport speed increased by 40%, and transport load increased by more than 50 times;

[0051] 2. Single-trip horizontal transport speed increased by 10%, and transport load increased by more than 10 times;

[0052] 3. By integrating vertical and horizontal transportation, the number of workers required for a single transport trip can be reduced by 30%.

[0053] 4. Each nuclear island unit saves 1,000 square meters of inventory space.

[0054] 5. The utilization rate of vertical hoisting and horizontal transportation equipment and tooling is greater than 90%. Tooling utilization rate = planned application days (equipment and tooling installation start time - equipment and tooling dismantling time) / actual number of days of equipment and tooling use.

Claims

1. A vertical transport fixture for construction items within the elevator shaft of a nuclear island plant, characterized in that: It includes a top support cross beam (1), a grid-shaped maintenance platform frame (2) is set below the top support cross beam (1), a lifting device (3) is set between the top support cross beam (1) and the grid-shaped maintenance platform frame (2), and a cage (5) is set at the bottom of the lifting device (3).

2. The vertical transport fixture for construction items in the elevator shaft of a nuclear island plant as described in claim 1, characterized in that: It also includes a fall arrestor (4), one end of which is connected to the top support cross beam (1), and the other end is connected to the cage (5).

3. The vertical transport fixture for construction items in the elevator shaft of a nuclear island plant as described in claim 2, characterized in that: The cage (5) is made of H-beams, channel steel, steel plates, round pipes and other materials welded together.

4. A method for installing a vertical transport fixture for construction items in the elevator shaft of a nuclear island plant, characterized in that, Includes the following steps: Step 1: Prefabrication; Step 2: Installation; Step 3: Connect; Step 4: Debugging.

5. The installation method of the vertical transportation fixture for construction items in the elevator shaft of a nuclear island plant as described in claim 4, characterized in that: Step one includes the following: Prefabricated embedded parts, prefabricated top support components, prefabricated maintenance platform components, and prefabricated cage components are manufactured according to their inherent characteristics.

6. The installation method of the vertical transportation fixture for construction items in the elevator shaft of a nuclear island plant as described in claim 5, characterized in that: Step two includes the following: Follow the installation steps below in sequence. Install the embedded plate; Install welding and maintenance platform; Install and weld the top support, dismantle the scaffolding below the support structure, and fabricate and install the hoist cage; Install a chain electric hoist and a fall arrestor.

7. The installation method of the vertical transportation fixture for construction items in the elevator shaft of a nuclear island plant as described in claim 6, characterized in that: Step three includes the following: The electric hoist, fall arrestor, and cage are connected.

8. The installation method of the vertical transportation fixture for construction items in the elevator shaft of a nuclear island plant as described in claim 7, characterized in that: Step four includes the following: After debugging and load testing, if the requirements are met, the device is put into use; if the requirements are not met, the connection relationship is adjusted and the load test is carried out again until the requirements are met.

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