A special radiation shielding device for airlock door window

Abstract

The utility model provides a kind of special radiation shielding device of air lock door window, including shell, organic glass layer, magnetic attraction mechanism and handle. Shell is wrapped around the four around organic glass layer, and organic glass layer is made of transparent flame-retardant anti-radiation gadolinium-containing organic glass. One end of shell is provided with magnetic attraction mechanism, and the other end is provided with handle. When using, staff hand handle and make the magnetic attraction mechanism of special radiation shielding device adsorb on air lock door, so that organic glass layer just covers window, and staff outside air lock door can observe the situation inside air lock door through organic glass layer. On the one hand, visual organic glass layer can effectively scatter and absorb neutron radiation from factory building interior through window, significantly reduce the neutron dose rate outside window. On the other hand, special design is adopted, and the structure is simple, so that the installation and disassembly process of special radiation shielding device is simple and fast, the operation time is greatly shortened, and the magnetic attraction is fixed firmly, not easy to fall.

Description

Technical Field

[0001] This utility model belongs to the field of nuclear radiation protection technology, and specifically relates to a special radiation shielding device for an airlock window. Background Technology

[0002] During the operation of nuclear power plants, ionizing radiation of varying degrees is generated in certain radioactive buildings. Personnel airlocks, serving as the essential passageways for workers entering and exiting these buildings, typically have viewing windows to allow staff to observe the interior of the buildings. However, conventional window materials do not inherently possess shielding properties against ionizing radiation, making these windows a weak link in the overall radiation protection system.

[0003] Currently, although radiation shielding devices exist for pipes or other penetrating structures, their structure and installation methods are not well-suited for the circular or elliptical viewing windows commonly found on airlocks. Due to the lack of shielding devices specifically designed for personnel airlock viewing windows in nuclear power plants, existing shielding solutions often suffer from problems such as complex installation, inconvenient disassembly, difficulty in guaranteeing shielding effectiveness, and potential damage to existing equipment. These solutions fail to meet the comprehensive needs of nuclear power plants in ensuring radiation protection safety while maintaining normal equipment operation and personnel function.

[0004] Therefore, how to overcome the above-mentioned technical defects is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a special radiation shielding device for airlock windows, which has a simple structure and is easy to disassemble and assemble.

[0006] To solve the above-mentioned technical problems, this utility model provides a special radiation shielding device for airlock windows, comprising:

[0007] The outer casing has mounting cavities extending through both ends of the outer casing;

[0008] An acrylic glass layer is disposed within the mounting cavity, and the acrylic glass layer is made of flame-retardant, radiation-proof gadolinium-containing acrylic glass.

[0009] A magnetic attraction mechanism is provided at one end of the housing for magnetic attraction with the airlock.

[0010] A handle is located at the other end of the housing.

[0011] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, the plexiglass layer and the mounting cavity of the outer shell are connected by interference fit, glue bonding, or pressure cap fixation.

[0012] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, a protective ring is provided between the plexiglass layer and the outer shell.

[0013] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, a sealing gasket is provided on one end face of the outer shell, and the sealing gasket has a clearance groove or clearance hole to avoid the magnetic attraction mechanism.

[0014] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, the outer shell is generally hat-shaped, the top opening of the hat-shaped structure of the outer shell is connected to the mounting cavity, the bottom has an outward flange, the handle is provided at the edge of the top opening, and the plexiglass layer is provided at the outward flange.

[0015] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, the top opening is circular, and the plexiglass layer is disc-shaped;

[0016] And / or, the handles are two respectively located on both sides of the edge of the top opening.

[0017] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, a notch is provided on the outer flange to allow for the protruding bolts next to the airlock window to pass.

[0018] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, the outer shell is provided with a mounting groove for the magnetic attraction mechanism, the bottom of the mounting groove is provided with a threaded hole, the magnetic attraction mechanism is a ring structure, and is connected to the threaded hole by a bolt passing through the middle of the magnetic attraction mechanism.

[0019] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, the magnetic attraction mechanism and the mounting groove are multiple in a one-to-one correspondence, and the multiple mounting grooves are arranged at intervals on the end face of the outer shell.

[0020] Optionally, in the above-mentioned dedicated radiation shielding device for the airlock window, the outer casing is a metal casing;

[0021] And / or, the magnetic attraction mechanism is a high-strength neodymium iron boron permanent magnet.

[0022] This utility model provides a special radiation shielding device for airlock windows, the advantages of which are:

[0023] In use, workers hold the handle and attach the magnetic mechanism of the specialized radiation shielding device to the airlock, ensuring the acrylic glass layer completely covers the viewing window. Workers outside the airlock can observe the interior of the factory through the acrylic glass. On one hand, the visible acrylic glass layer effectively scatters and absorbs neutron radiation from inside the factory that passes through the viewing window, achieving radiation protection and significantly reducing the neutron dose rate outside the window. On the other hand, the specially designed magnetic structure is simple, making the installation and removal of the specialized radiation shielding device easy and quick, greatly shortening operation time, improving work efficiency, and ensuring a secure magnetic fixation that prevents it from falling off. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 A front view of a dedicated radiation shielding device for an airlock window provided in an embodiment of this utility model;

[0026] Figure 2 A schematic diagram of the structure of a special radiation shielding device for an airlock window provided in an embodiment of this utility model;

[0027] Figure 3 Rear view of a dedicated radiation shielding device for an airlock window provided in an embodiment of this utility model;

[0028] Figure 4 A side view of a special radiation shielding device for an airlock window provided in an embodiment of this utility model;

[0029] Figure 5 A cross-sectional view of a dedicated radiation shielding device for an airlock window provided in an embodiment of this utility model;

[0030] Figure 6 This is a schematic diagram of the magnetic attraction mechanism provided in an embodiment of the present utility model;

[0031] Figure 7 A schematic diagram showing the installation of a dedicated radiation shielding device for the airlock window provided in this embodiment of the utility model on the airlock.

[0032] In the image above:

[0033] 100 - Outer shell;

[0034] 110 - Protective ring; 120 - Notch; 130 - Sealing gasket;

[0035] 200- Acrylic glass layer;

[0036] 300 - Magnetic suction mechanism;

[0037] 400-handle;

[0038] 500-bolt;

[0039] A-Airlock. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] The core of this utility model is to provide a special radiation shielding device for airlock windows, which has a simple structure and is easy to disassemble and assemble.

[0042] To enable those skilled in the art to better understand the technical solutions provided by this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] For details, please refer to Figures 1-7 The present invention provides a special radiation shielding device for an airlock window, comprising: a shell 100, an plexiglass layer 200, a magnetic attraction mechanism 300, and a handle 400.

[0044] The outer casing 100 has mounting cavities extending through both ends of the outer casing 100. These mounting cavities serve as mounting positions for the acrylic glass layer 200, providing space for the acrylic glass layer 200. The interior of the factory building inside the airlock A can be observed from the outside through the transparent acrylic glass layer 200 within the mounting cavities of the outer casing 100. The outer casing 100, as the outermost protective layer of the dedicated radiation shielding device, is made of stainless steel or other corrosion-resistant, easy-to-clean metal materials, protecting the internal acrylic glass layer 200 and providing structural support.

[0045] An acrylic glass layer 200 is disposed within the mounting cavity. The acrylic glass layer 200 is made of flame-retardant, radiation-shielding gadolinium-containing acrylic glass. The composition and preparation method of this flame-retardant, radiation-shielding gadolinium-containing acrylic glass are already described in existing technologies and will not be elaborated here. As a shielding material, the acrylic glass layer 200 has a smooth surface, good transparency, and excellent flame-retardant properties, and is widely used in fields involving neutron radiation and gamma rays. The thickness and specific material of the acrylic glass layer 200 can be designed according to the type and energy of the radiation to be shielded and the target dose rate requirements.

[0046] A magnetic attraction mechanism 300 is located at one end of the housing 100 for magnetic attachment to the airlock A. The dedicated radiation shielding device is installed to the airlock A using magnetic attachment, making installation convenient. When shielding is no longer needed, the dedicated radiation shielding device can be quickly and easily removed without tools, and can be operated by a single person. The magnetic attraction mechanism 300 can be reliably magnetically fixed to the window frame or door body of the airlock A.

[0047] A handle 400 is located at the other end of the housing 100, providing a handhold for moving the dedicated radiation shielding device. By pulling the handle 400 toward the worker's body, the dedicated radiation shielding device can be released and removed from the airlock window.

[0048] This utility model provides a special radiation shielding device for an airlock window, which consists of an outer shell 100 surrounding an acrylic glass layer 200. The acrylic glass layer 200 is made of transparent, flame-retardant, radiation-proof gadolinium-containing acrylic glass, which can effectively absorb neutrons and reduce the radiation dose to workers. One end of the outer shell 100 is provided with a magnetic suction mechanism 300, and the other end is provided with a handle 400.

[0049] When in use, the handle 400 is used to attach the magnetic attraction mechanism 300 of the special radiation shielding device to the airlock A, so that the plexiglass layer 200 just covers the viewing window. The staff outside the airlock A can observe the internal situation of the factory inside the airlock A through the plexiglass layer 200.

[0050] On the one hand, the visible acrylic glass layer 200 can effectively scatter and absorb neutron radiation from inside the factory through the viewing window, achieving radiation protection and significantly reducing the neutron dose rate outside the viewing window. On the other hand, the specially designed magnetic structure is simple, making the installation and disassembly of the dedicated radiation shielding device simple and quick, greatly shortening the operation time, improving work efficiency, and ensuring a secure magnetic fixation that prevents it from falling off.

[0051] In a specific embodiment, the mounting cavity between the plexiglass layer 200 and the outer shell 100 is connected by interference fit, adhesive bonding, or pressure cap.

[0052] In one embodiment, an interference fit is used between the plexiglass layer 200 and the mounting cavity of the outer shell 100, that is, the size of the plexiglass layer 200 is slightly larger than the size of the mounting cavity of the outer shell 100. When the two are assembled together, elastic deformation will occur, and this deformation can play a fixing role.

[0053] In another embodiment, adhesive is used to bond the acrylic layer 200 and the mounting cavity of the outer shell 100, which can fill the tiny gaps between them and achieve fixation. For example, a 1mm-3mm layer of sealant is evenly applied to the contact surface between the acrylic layer 200 and the outer shell 100 to ensure a tight seal.

[0054] In another configuration, the acrylic layer 200 and the housing 100 are fixed together by a pressure cap. The pressure cap's tightening action firmly clamps the acrylic layer 200 and the housing 100 together, maintaining a stable connection even under external forces such as vibration and impact. Depending on the specific circumstances, one or more of the above-mentioned methods can be selected for connection.

[0055] To protect the edges of the acrylic layer 200, a protective ring 110 is provided between the acrylic layer 200 and the outer shell 100. The protective ring 110 is a ring structure and is fitted around the outer periphery of the acrylic layer 200. The protective ring 110 can be made of rubber or other elastic materials, which can play a buffering role through the material properties, reducing the direct collision and impact of external objects on the acrylic layer 200 and the outer shell 100, protecting them from damage. At the same time, it makes it easier to install the acrylic layer 200 into the mounting cavity of the outer shell 100.

[0056] In a specific embodiment, a sealing gasket 130 is provided on one end face of the outer casing 100. The sealing gasket 130 has a clearance groove or clearance hole to avoid obstructing the magnetic force of the magnetic attraction mechanism 300. The arrangement of the clearance groove or clearance hole corresponds to the position of the magnetic attraction mechanism 300 and can be adapted to the actual situation.

[0057] A sealing gasket 130 is provided on the contact surface between the outer shell 100 and the airlock A. The sealing gasket 130 is made of rubber or other elastic flexible materials to prevent the hard outer shell 100 from scratching or damaging the glass or door surface during installation and use, and to provide a certain buffering and sealing effect, thereby increasing the stability of the installation.

[0058] Based on the above specific embodiments, such as Figure 2 and Figure 4 As shown, the outer shell 100 is generally hat-shaped. The top opening of the hat-shaped structure of the outer shell 100 is connected to the mounting cavity, and the bottom has an outward flange. A handle 400 is provided on the edge of the top opening, and an organic glass layer 200 is provided on the outward flange.

[0059] Specifically, the top opening is circular, and the plexiglass layer 200 is disc-shaped. The shape of the top opening matches the shape of the airlock's viewing window, ensuring complete coverage of the viewing area.

[0060] For ease of operation, the handles 400 are two respectively located on both sides of the top opening edge. Specifically, they can be located on the other end face of the housing 100 or on the side of the other end face of the housing 100, depending on actual needs.

[0061] The outer edge has a notch 120 for the protruding bolt next to the window of the airlock A. During installation, align the special radiation shielding device with the window of the airlock A, align the notch 120 of the special radiation shielding device with the protruding bolt next to the window, and place the special radiation shielding device over the window of the airlock. It can then be fixed by magnetic attraction.

[0062] In a specific embodiment, the outer casing 100 is provided with a mounting groove for the magnetic attraction mechanism 300, and the bottom of the mounting groove is provided with a threaded hole.

[0063] like Figure 6 As shown, the magnetic attraction mechanism 300 has a ring structure, and is connected to the threaded hole through the middle of the magnetic attraction mechanism 300 by a bolt 500. By means of embedded installation, the magnetic attraction mechanism 300 is placed inside the housing 100 to achieve adsorption, and the bolt 500 is used to securely connect the magnetic attraction mechanism 300.

[0064] To improve the adsorption effect, the magnetic attraction mechanism 300 and the mounting slot are multiple in a one-to-one correspondence. The multiple mounting slots are arranged at intervals on the end face of the outer shell 100, and the entire end face of the outer shell 100 is stably adsorbed onto the airlock A through multiple adsorption points.

[0065] In a specific embodiment, the outer casing 100 is a metal casing that protects the internal shielding material. The metal casing provides a robust and durable structure, and its outer surface is easy to clean and decontaminate, meeting the requirements for use in nuclear facilities. Specifically, the outer casing 100 is formed by welding 1.5mm thick 304 stainless steel plates.

[0066] In a specific embodiment, the magnetic attraction mechanism 300 is a high-strength neodymium iron boron permanent magnet. For example... Figure 2 As shown, the magnetic attraction mechanism 300 is designed with six high-strength neodymium iron boron permanent magnets evenly distributed along the circumference of the outer flange. The sealing gasket 130 can be a silicone rubber gasket with a thickness of 3mm.

[0067] The beneficial effects of the technical solution provided by this utility model include:

[0068] 1. Neutron shielding: When a dedicated radiation shielding device covers the airlock window, it can effectively absorb neutrons, reduce the radiation dose to workers, and effectively protect personnel observing through the airlock window;

[0069] 2. Quick assembly and disassembly: It adopts a magnetic fixing method, which enables quick installation and disassembly;

[0070] 3. Safe and environmentally friendly: All materials used do not contain toxic elements such as lead and cadmium;

[0071] 4. Fireproof and flame retardant: The flame retardant rating of the plexiglass layer reaches UL94 V-0 level, meeting the fire protection requirements of nuclear power plants.

[0072] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0073] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0074] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0075] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A special radiation shielding device for an airlock window, characterized in that, include: The housing (100) has mounting cavities extending through both ends of the housing (100); An plexiglass layer (200) is disposed within the mounting cavity, and the plexiglass layer (200) is made of flame-retardant, radiation-proof gadolinium-containing plexiglass; A magnetic attraction mechanism (300) is provided at one end of the housing (100) for magnetic attraction with the airlock (A); A handle (400) is provided at the other end of the housing (100).

2. The dedicated radiation shielding device for the airlock window according to claim 1, characterized in that, The mounting cavity between the plexiglass layer (200) and the outer shell (100) is connected by interference fit, adhesive bonding, or pressure cap.

3. The dedicated radiation shielding device for the airlock window according to claim 1, characterized in that, A protective ring (110) is provided between the plexiglass layer (200) and the outer shell (100).

4. The dedicated radiation shielding device for the airlock window according to claim 1, characterized in that, A sealing gasket (130) is provided on one end face of the outer shell (100), and the sealing gasket (130) has a clearance groove or clearance hole to avoid the magnetic attraction mechanism (300).

5. The dedicated radiation shielding device for the airlock window according to any one of claims 1-4, characterized in that, The outer shell (100) is generally hat-shaped. The top opening of the hat-shaped structure of the outer shell (100) is connected to the mounting cavity, and the bottom has an outward flange. The handle (400) is provided on the edge of the top opening, and the organic glass layer (200) is provided on the outward flange.

6. The dedicated radiation shielding device for the airlock window according to claim 5, characterized in that, The top opening is circular, and the plexiglass layer (200) is disc-shaped; And / or, the handles (400) are two respectively located on both sides of the edge of the top opening.

7. The dedicated radiation shielding device for the airlock window according to claim 5, characterized in that, The outer flange has a notch (120) for protruding bolts next to the window for avoiding the airlock (A).

8. The dedicated radiation shielding device for the airlock window according to claim 1, characterized in that, The outer casing (100) is provided with a mounting groove for the magnetic attraction mechanism (300), and a threaded hole is provided at the bottom of the mounting groove. The magnetic attraction mechanism (300) is a ring structure, and a bolt (500) is used to pass through the middle of the magnetic attraction mechanism (300) and connect to the threaded hole.

9. The dedicated radiation shielding device for the airlock window according to claim 8, characterized in that, The magnetic attraction mechanism (300) and the mounting slot are a plurality of one-to-one correspondences, and the plurality of mounting slots are arranged at intervals on the end face of the housing (100).

10. The dedicated radiation shielding device for the airlock window according to claim 1, characterized in that, The outer casing (100) is a metal casing; And / or, the magnetic attraction mechanism (300) is a high-strength neodymium iron boron permanent magnet.

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