Modular combined special lifting and transfer tool for nuclear maintenance

Abstract

The application provides a modular combined special hoisting and transferring tool for nuclear equipment maintenance, which comprises a hoisting box, a transferring cylinder segment, an intermediate cylinder segment and a receiving cylinder segment. The hoisting box is internally provided with a hoisting machine, the hoisting machine hoists and lowers the nuclear equipment, components and pipeline accessories which need to be transferred out of the cabin through a hoisting rope; the transferring cylinder segment, the intermediate cylinder segment and the receiving cylinder segment are made of shielding materials, the transferring cylinder segment, the intermediate cylinder segment and the receiving cylinder segment are connected through bolts, the end faces of adjacent cylinder segments are opened, and the hoisting and maintenance channel is established; the receiving cylinder segment is provided with a cylinder segment door for receiving the nuclear equipment, components and pipeline accessories. The technical scheme of the application provides a receiving, hoisting and transferring tool when the nuclear equipment, components, pipeline accessories and the like in the cabin of a marine nuclear power device need to be maintained or replaced out of the cabin, reduces the space occupation rate of the maintenance operation, ensures the effective containment of radioactive substances, and makes the out-of-cabin process of the nuclear maintenance of the marine nuclear power device have higher safety and reliability.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and specifically relates to a modular, combined, special hoisting and transfer tool for nuclear-related maintenance. Background Technology

[0002] After prolonged operation, nuclear-related equipment, components, and piping accessories in the reactor compartment of a marine nuclear power plant may experience functional degradation or damage due to factors such as service life, operating environment, and operation. When it is necessary to maintain the system's functional performance, replacement or repair is often required.

[0003] For operations not involving radioactive systems and equipment, on-site repairs and replacements or direct hoisting outside the vessel are usually feasible. However, nuclear-related maintenance activities require consideration of radioactive material containment, radioactive waste generation, and radiation protection, as a leak could expose crew members and the environment to radioactive hazards, causing incalculable losses. Furthermore, marine nuclear power plants differ from land-based nuclear power plants, which have relatively ample resources and space.

[0004] Therefore, nuclear-related maintenance of marine nuclear power plants has always been a high-risk technical challenge for the industry. How to provide a modular and combined special hoisting and transfer tool for nuclear-related maintenance, so that when nuclear-related equipment, components, pipeline accessories, etc. need to be removed from the reactor compartment of a marine nuclear power plant for maintenance or replacement, the process of removing nuclear-related equipment, components, pipeline accessories, etc. from the reactor compartment has become a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This invention provides a modular, combined, dedicated hoisting and transfer tool for nuclear-related maintenance. When nuclear-related equipment, components, pipeline accessories, etc., inside the reactor compartment of a marine nuclear power plant need to be removed for maintenance or replacement, the tool provides receiving, hoisting, and transfer capabilities. While reducing the space occupied during maintenance operations, it ensures the effective containment of radioactive materials, making the process of removing nuclear-related equipment from the reactor compartment of a marine nuclear power plant safer and more reliable.

[0006] In this embodiment of the invention, a modular, combined special hoisting and transfer tool for nuclear-related maintenance is provided. The special hoisting and transfer tool includes: a hoisting box, a transfer cylinder section, an intermediate cylinder section, and a receiving cylinder section.

[0007] The hoisting container has a built-in hoisting machine, which uses hoisting ropes to lift and lower nuclear-related equipment, components, and pipeline accessories that need to be transferred outside the container.

[0008] The transfer cylinder section, intermediate cylinder section, and receiving cylinder section are made of shielding material. The transfer cylinder section, intermediate cylinder section, and receiving cylinder section are connected by bolts. The end faces of adjacent cylinder sections are opened to establish maintenance and hoisting channels.

[0009] The receiving section is equipped with a section hatch for receiving the nuclear-related equipment, components, and pipeline accessories.

[0010] Furthermore, the hoist inside the hoisting box is used to drive the hoisting rope to lift the nuclear-related equipment, pass through several intermediate sections between the receiving section and the transfer section, and after reaching the transfer section, close the end faces of the sections between the receiving section, intermediate sections and transfer section to store the nuclear-related equipment inside the transfer section.

[0011] Furthermore, the diameter and length of the transfer section, intermediate section, and receiving section are adjusted according to the actual maintenance needs of nuclear-related equipment, components, pipeline accessories, and the adaptability of the cabin environment.

[0012] Furthermore, the electric pump in the reactor compartment passes through several intermediate sections between the receiving section and the transfer section in sequence. After reaching the transfer section, it is stored inside the transfer section. The transfer section and the intermediate sections are then disassembled, and the hoisting container, together with the transfer section, is hoisted and transferred to the shore-based dock or the nuclear-related maintenance facility at the base.

[0013] Furthermore, other nuclear-related equipment that needs to be removed from the reactor compartment is transferred to the receiving section to improve the efficiency of the removal and maintenance of the nuclear-related equipment.

[0014] Furthermore, the operating temperature of the transfer cylinder section, intermediate cylinder section, and receiving cylinder section is 0℃-300℃, inert gas is used for sealing, and the operating pressure is normal pressure.

[0015] The beneficial effects of this invention are as follows:

[0016] As can be seen from the above scheme, the embodiments of the present invention provide a modular, combined, dedicated hoisting and transfer tool for nuclear-related maintenance, including: a hoisting box, a transfer section, an intermediate section, and a receiving section. The hoisting box houses a hoisting machine, which uses hoisting ropes to lift and lower nuclear-related equipment, components, and piping accessories requiring transfer outside the reactor compartment. The transfer section, intermediate section, and receiving section are made of shielding material and are bolted together. Adjacent sections have open end faces to establish a maintenance hoisting channel. The receiving section has a hatch for receiving the nuclear-related equipment, components, and piping accessories. This invention provides a receiving, hoisting, and transfer tool when nuclear-related equipment, components, and piping accessories within the reactor compartment of a marine nuclear power plant need to be removed for maintenance or replacement. This reduces the space occupancy during maintenance operations while ensuring effective containment of radioactive materials, thus enhancing the safety and reliability of the nuclear-related maintenance process outside the reactor compartment of a marine nuclear power plant. Attached Figure Description

[0017] Figure 1A schematic diagram illustrating a modular, combined, dedicated hoisting and transport tool for nuclear-related maintenance according to an embodiment of the present invention;

[0018] Figure 2 This diagram illustrates the lifting process of nuclear-related equipment within a section of a modular, combined nuclear-related maintenance special lifting and transfer tool according to an embodiment of the present invention.

[0019] In the diagram, 1 is the hoisting box, 1-1 is the hoisting machine, 1-2 is the hoisting rope, 1-3 is the grab, 2 is the transfer cylinder section, 3 is the intermediate cylinder section, 4 is the receiving cylinder section, 4-1 is the cylinder section door, and 5 is the electric pump. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] In this embodiment of the invention, a modular, combined special hoisting and transfer tool for nuclear-related maintenance is used to provide receiving, hoisting, and transfer tools when nuclear-related equipment, components, pipeline accessories, etc., inside the reactor compartment of a marine nuclear power plant need to be removed from the compartment for maintenance or replacement. This reduces the space occupied during maintenance operations while ensuring the effective containment of radioactive materials, making the process of removing nuclear-related equipment from the compartment for nuclear-related maintenance of marine nuclear power plants safer and more reliable.

[0022] like Figure 1 As shown, Figure 1 This diagram illustrates a modular, combined, dedicated hoisting and transport tool for nuclear-related maintenance, according to an embodiment of the present invention.

[0023] Figure 1 Among them, a modular and combined special hoisting and transfer tool for nuclear-related maintenance is disclosed. The special hoisting and transfer tool includes: a hoisting box 1, a transfer cylinder section 2, an intermediate cylinder section 3, and a receiving cylinder section 4.

[0024] The hoisting container has a built-in hoisting machine, which uses hoisting ropes to lift and lower nuclear-related equipment, components, and pipeline accessories that need to be transferred outside the container.

[0025] The transfer cylinder section, intermediate cylinder section, and receiving cylinder section are made of shielding material. The transfer cylinder section, intermediate cylinder section, and receiving cylinder section are connected by bolts. The end faces of adjacent cylinder sections are opened to establish maintenance and hoisting channels.

[0026] The receiving section is equipped with a section hatch for receiving the nuclear-related equipment, components, and pipeline accessories.

[0027] In this embodiment of the invention, a modular and combined special hoisting and transfer tool for nuclear-related maintenance is provided. It can achieve modular and combined splicing and assembly, and can be adapted to the actual compartment structure, openings, and nuclear-related equipment, components, and pipeline accessories to be hoisted and transferred. It is flexible, highly adaptable, and reusable. The hoisting box can be flexibly hoisted and transferred in the top compartment of the nuclear-related compartment, avoiding the traditional hoisting channel leading to the ship platform deck, greatly reducing the channel length, and reducing the configuration of channel shielding materials, radiation monitoring points, negative pressure ventilation auxiliary equipment, etc.

[0028] In this embodiment of the invention, by rationally arranging the procedures and processes for removing nuclear-related equipment, components, pipeline accessories, etc. from the cabin, parallel nuclear-related hoisting and transfer operations can be achieved, further improving the efficiency, safety, and reliability of nuclear-related maintenance. This invention is also applicable to nuclear-related bases, docks, and other nuclear-related temporary storage and maintenance workshops, as well as transfer scenarios between bases, docks, and transfer vehicles or ships.

[0029] In one embodiment of the present invention, the hoist inside the hoisting box is used to drive the hoisting rope to lift the nuclear-related equipment, pass through a plurality of intermediate sections between the receiving section and the transfer section, and after reaching the transfer section, close the end faces of the sections between the receiving section, intermediate sections and the transfer section to store the nuclear-related equipment inside the transfer section.

[0030] In one embodiment of the present invention, the diameter and length of the transfer section, intermediate section and receiving section are adjusted according to the actual maintenance needs of nuclear-related equipment, components, pipeline accessories and the adaptability of the cabin environment.

[0031] In one embodiment of the present invention, the electric pump in the reactor compartment passes through several intermediate sections between the receiving section and the transfer section in sequence. After reaching the transfer section, it is stored inside the transfer section. The transfer section and the intermediate sections are disassembled, and the hoisting container together with the transfer section is hoisted and transferred to the shore-based wharf or the nuclear maintenance facility at the base.

[0032] In one embodiment of the present invention, other nuclear-related equipment that needs to be removed from the reactor compartment is transferred to the receiving tube section to improve the efficiency of the removal and maintenance of the nuclear-related equipment.

[0033] In one embodiment of the present invention, the operating temperature of the transfer cylinder section, the intermediate cylinder section and the receiving cylinder section is 0℃-300℃, the inert gas is sealed, and the operating pressure is normal pressure.

[0034] In this embodiment of the invention, based on the layout of the nuclear-related compartment and the openings at the top of the compartment, the modular, combined nuclear-related maintenance hoisting and transfer tool is assembled and installed. The receiving section, intermediate section, and transfer section are fixed together with bolts, and the end faces of adjacent sections are opened to establish a maintenance hoisting channel. Nuclear-related equipment, components, pipeline accessories, etc., that need to be removed from the compartment enter the receiving section through the section door. Subsequently, the nuclear-related equipment (taking an electric pump as an example, but it could also be a component or pipeline accessory) is secured using the grab at the front end of the hoisting rope inside the hoisting box, and the section door is closed.

[0035] Subsequently, the nuclear-related equipment is lifted by the hoisting machine inside the hoisting container, driven by the hoisting rope. It passes through several intermediate sections between the receiving section and the transfer section. After reaching the transfer section, the end faces of the sections between the receiving section, intermediate sections, and transfer section are closed, and the nuclear-related equipment is stored inside the transfer section. Finally, the transfer section and intermediate sections are disassembled, and the hoisting container together with the transfer section is hoisted and transferred to the shore-based dock or the nuclear-related maintenance facility at the base.

[0036] In one embodiment of the present invention, the hoisting container 1 has a built-in hoisting machine 1-1, which uses hoisting ropes 1-2 to hoist nuclear-related equipment, components, pipeline accessories, etc. that need to be hoisted and transferred. The transfer section, intermediate section, and receiving section are made of shielding material. The sections have inert gas (such as argon) filling ports and exhaust ports, and have the characteristics of radiation shielding, inert gas sealing, and flexible assembly. The end faces of the sections can be opened and closed to provide a channel for hoisting nuclear-related equipment, components, pipeline accessories. The receiving section is equipped with a section door 4-1 for receiving nuclear-related equipment, components, pipeline accessories, etc.

[0037] like Figure 2 As shown, Figure 2 This diagram illustrates the lifting process of nuclear-related equipment within a reactor compartment using a modular, combined, dedicated lifting and transport tool for nuclear-related maintenance, according to an embodiment of the present invention.

[0038] Figure 2In the process, based on the layout within the reactor compartment 6 and the openings at the top of the compartment, the modular, combined nuclear-related maintenance-specific hoisting and transfer tool is assembled and installed. The receiving section 4, intermediate sections 3, and transfer section 2 are fixed together with bolts, and the end faces of adjacent sections are opened to establish a maintenance hoisting channel. Nuclear-related equipment, components, and piping accessories (taking electric pump 5 as an example, but also components or piping accessories) that need to be removed from the compartment enter the receiving section 4 through the section door 4-1. Then, the electric pump 5 is secured using the gripper 1-3 at the front of the hoisting rope 1-2 inside the hoisting box 1, and the section door 4-1 is closed. Subsequently, the electric pump 5 is lifted by the hoisting machine 1-1 inside the hoisting box 1, driving the hoisting rope 1-2, and sequentially passed through several intermediate sections 3 between the receiving section 4 and the transfer section 2. Upon reaching the transfer section 2, the end faces of the sections between the receiving section 4, intermediate sections 3, and transfer section 2 are closed, and the electric pump 5 is stored inside the transfer section 2.

[0039] After the electric pump 5 is stored inside the transfer section 2, the end face of the section between the transfer section 2 and the intermediate section 3 is closed. The transfer section and the intermediate section are then disassembled, with the transfer section 2 remaining sealed. The container 1 and transfer section 2 are then hoisted to the shore-based dock or nuclear-related maintenance facility via shore-based or shipboard transfer facilities. Simultaneously, other nuclear-related equipment requiring removal from the reactor hold can be transferred to the receiving section 4 to improve the efficiency of removal for maintenance.

[0040] In this embodiment of the invention, the diameter and length of the transfer section, intermediate section, and receiving section can be adjusted according to the actual maintenance needs of nuclear-related equipment, components, pipeline accessories, and the adaptability of the cabin environment. The working temperature inside the section is 0-300℃, sealed with inert gas, and the working pressure is atmospheric pressure.

[0041] In this embodiment of the invention, a modular, combined, dedicated hoisting and transfer tool for nuclear-related maintenance is provided. This tool enables modular, combined splicing and assembly, and can be adaptively adjusted according to the actual compartment structure, openings, and the nuclear-related equipment, components, and piping accessories to be hoisted and transferred. It is flexible, adaptable, and reusable. Secondly, the hoisting container allows for flexible hoisting and transfer within the top compartment of the nuclear-related compartment, avoiding the traditional hoisting passageway leading to the ship's platform deck. This significantly reduces the passageway length and the need for shielding materials, radiation monitoring points, and negative pressure ventilation auxiliary equipment. Thirdly, by rationally arranging the procedures and processes for removing nuclear-related equipment, components, and piping accessories from the compartment, parallel nuclear-related hoisting and transfer operations can be achieved, improving the efficiency, safety, and reliability of nuclear-related maintenance. Fourthly, this invention is also applicable to the transfer of nuclear-related equipment from nuclear bases, docks, and other nuclear-related temporary storage and maintenance workshops, as well as the transfer between bases / docks and transfer vehicles / ships.

[0042] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A modular, combined, specialized hoisting and transport tool for nuclear-related maintenance, characterized in that: The special hoisting and transfer tool includes: a hoisting box, a transfer cylinder section, an intermediate cylinder section, and a receiving cylinder section; The hoisting container has a built-in hoisting machine, which uses hoisting ropes to lift and lower nuclear-related equipment, components, and pipeline accessories that need to be transferred outside the container. The transfer cylinder section, intermediate cylinder section, and receiving cylinder section are made of shielding material. The transfer cylinder section, intermediate cylinder section, and receiving cylinder section are connected by bolts. The end faces of adjacent cylinder sections are opened to establish maintenance and hoisting channels. The receiving section is equipped with a section hatch for receiving the nuclear-related equipment, components, and pipeline accessories; The electric pump in the pod passes through several intermediate sections between the receiving section and the transfer section in sequence. After reaching the transfer section, it is stored inside the transfer section. The transfer section and the intermediate sections are disassembled, and the hoisting container together with the transfer section is hoisted and transferred to the shore-based dock or the nuclear maintenance facility at the base.

2. The modular, combined, specialized hoisting and transport tool for nuclear-related maintenance according to claim 1, characterized in that, The hoisting machine inside the hoisting box is used to drive the hoisting rope to lift the nuclear-related equipment, pass through several intermediate sections between the receiving section and the transfer section, and after reaching the transfer section, close the end faces of the sections between the receiving section, intermediate sections and the transfer section to store the nuclear-related equipment inside the transfer section.

3. The modular, combined, specialized hoisting and transport tool for nuclear-related maintenance according to claim 1, characterized in that, The diameters and lengths of the transfer section, intermediate section, and receiving section are adjusted according to the actual maintenance needs of nuclear-related equipment, components, pipeline accessories, and the adaptability of the cabin environment.

4. The modular, combined, specialized hoisting and transport tool for nuclear-related maintenance according to claim 1, characterized in that, Other nuclear-related equipment that needs to be removed from the reactor compartment is transferred to the receiving section to improve the efficiency of its removal and maintenance.

5. A modular, combined, specialized hoisting and transport tool for nuclear-related maintenance according to any one of claims 1 to 4, characterized in that, The operating temperature of the transfer section, intermediate section, and receiving section is 0℃-300℃, sealed with inert gas, and the operating pressure is normal pressure.

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