Reactor radiation shield door

Abstract

The present application relates to a kind of reactor radiation shielding door, it includes main frame, door gap filling unit, inner door leaf, outer door leaf;Main frame is built on shielding structure;Formed with door hole on main frame;Door gap filling unit is adapted on the hole wall of door hole;In the closed state, inner door leaf and outer door leaf are respectively adapted on the opposite sides of door gap filling unit, with door gap filling unit together to block door hole to shield radiation;In the open state, inner door leaf and outer door leaf are opened along two opposite directions respectively, form the passage for personnel and equipment to pass through at door hole.Benefiting from the structural design of double door leaf, outer door leaf and inner door leaf together bear the demand of radiation shielding and personnel equipment passability, because the weight and volume of single door are reduced, can meet the requirement of on-site installation and anti-seismic design.So, both can effectively protect personnel and equipment (shielding effect is good), also solve the problem of passing convenience, also ensure that on-site can be implemented and meet the requirement of anti-seismic design.

Description

Technical Field

[0001] This invention relates to the field of nuclear industry design and manufacturing technology, and in particular to a reactor radiation shielding door. Background Technology

[0002] During nuclear power plant operation, neutrons and photons generated by source terms such as the reactor core can adversely affect surrounding equipment and personnel. Over time, these can accumulate and form irradiation hotspots that are difficult to remove. From the perspective of near-source shielding, installing shielding structures near the reactor or near the source can reduce the impact of source terms on the surrounding area during power operation, significantly reduce the dose rate, and thus reduce the radiation dose to personnel and equipment.

[0003] The existing shielding structures within a nuclear power plant are located between reactor buildings, serving as walls separating the building spaces. Each shielding structure has a civil engineering opening. Generally, after reactor auxiliary structures such as pipes pass through this opening, the remaining area provides a passage for personnel and equipment. In existing technology, while providing passage for personnel and equipment, radiation shielding functionality must also be considered at other times. Typically, a removable shielding wall is installed on the portion of the civil engineering opening except for the section where pipes pass (i.e., the remaining area serving as a passage). Each time personnel and equipment pass through, this entire shielding wall must be dismantled and reassembled. The work area for dismantling and reassembling the shielding wall is exposed to radioactive radiation. Even with special protection, prolonged exposure to this work area results in a significant cumulative radiation dose, which is highly detrimental to personnel health. Furthermore, the repeated dismantling and reassembly of this section also negatively impacts the radiation shielding function.

[0004] Previous designs involved incorporating a standard single-leaf shielding door into the shielding structure. However, the inventors discovered at least the following drawbacks: to ensure shielding effectiveness, the weight and volume of a single door were substantial, making it difficult to meet seismic resistance requirements, and installation was impossible due to the limited space on site. Furthermore, the thickness of a single door occupied a significant amount of space, failing to meet the requirements for personnel and equipment passage. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an improved reactor radiation shielding door.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a reactor radiation shielding door, which includes a main frame, a door gap sealing unit, an inner door leaf, and an outer door leaf;

[0007] The main frame is built on the shielding structure; a door opening is formed on the main frame; the door gap sealing unit is adapted to the wall of the door opening;

[0008] When the door is closed, the inner and outer door panels are respectively fitted to the opposite sides of the door gap sealing unit, and together with the door gap sealing unit, they block the door opening to shield radiation;

[0009] When the door is open, the inner and outer door panels open in opposite directions, forming a passage for personnel and equipment to pass through at the door opening.

[0010] Preferably, the door gap sealing unit includes a horizontal frame and two vertical frames;

[0011] The two vertical frames are respectively fixed to the two opposite inner sidewalls of the door opening;

[0012] The horizontal frame is fixed to the inner top wall of the door opening and connected between the two vertical frames.

[0013] Preferably, the horizontal and vertical frames are hollow structures filled with radiation shielding material.

[0014] Preferably, the reactor radiation shielding door further includes an outer door hinge; the outer door hinge includes a first outer door pivot, a connecting frame, and a second outer door pivot.

[0015] The first outer door hinge is hinged to the outer wall of the shielding structure; the second outer door hinge is hinged to the outer door leaf and parallel to the first outer door hinge; the connecting frame is connected between the first outer door hinge and the second outer door hinge.

[0016] Preferably, the first outer door hinge and / or the second outer door hinge are provided with bearings.

[0017] Preferably, the reactor radiation shielding door further includes an inner door hinge, which includes a first hinge leaf, an inner door pivot, and a second hinge leaf;

[0018] The first hinge is connected to the inner wall of the shielding structure; the second hinge is connected to the inner door leaf, and the inner door pivot is connected between the first hinge and the second hinge.

[0019] Preferably, the inner door hinge is provided with a bearing.

[0020] Preferably, corner transition areas are formed on the opposite surfaces of the door gap sealing unit;

[0021] The inner door leaf surface facing the door gap filling unit and the outer door leaf surface facing the door gap filling unit are both formed with an arc surface or slope that matches the corner transition area.

[0022] Preferably, the inner door leaf includes a hollow inner door frame and a radiation shielding material filled within the inner door frame; and / or:

[0023] The outer door leaf includes a hollow outer door frame and radiation shielding material filled within the outer door frame.

[0024] Preferably, the inner door frame has multiple inner door filling cavities arranged along its length for filling with radiation shielding material; the boundary between adjacent inner door filling cavities is a bevel, a step, or a sawtooth shape.

[0025] The outer door frame has multiple outer door filling cavities arranged along its length for filling with radiation shielding material; the boundaries between adjacent outer door filling cavities are beveled, stepped, or sawtooth-shaped.

[0026] Preferably, the reactor radiation shielding door further includes an outer door locking assembly disposed between the main frame and the outer door leaf.

[0027] Preferably, the main frame also has pipe clearance holes for pipes to pass through.

[0028] Preferably, the reactor radiation shielding door further includes an inner door locking assembly;

[0029] The inner door locking assembly is disposed on the inner door leaf, and in the closed state, the inner door locking assembly is located inside the door hole;

[0030] The inner door locking assembly locks the inner door leaf to the side wall of the door opening; and / or, the inner door locking assembly locks the inner door leaf to the bottom wall of the door opening.

[0031] Preferably, the inner door locking assembly includes a base plate assembly disposed on the inner door leaf and a locking rod disposed on the base plate assembly; the side wall and / or bottom wall of the door opening are provided with locking holes that match one end of the locking rod.

[0032] Preferably, the locking rod is a screw;

[0033] The inner door locking assembly further includes a locking assembly; the locking assembly includes a locking handle crank and a locking pivot; the locking pivot is disposed between the opposite end of the locking rod and the locking handle crank;

[0034] The locking lever can rotate back and forth between a first position and a second position around the locking pivot; in the first position, the locking lever and the locking rod are coaxially arranged; in the second position, the locking lever and the locking rod are arranged at an angle.

[0035] Preferably, the base plate assembly includes a base plate body, a lock base, a lock shaft, and a rotating connector;

[0036] The base plate body is disposed on the inner door leaf; the lock base is disposed on the base plate body; the lock shaft passes through the lock base; the rotating connector is provided with a through hole and a threaded hole, the lock shaft passes through the through hole on the rotating connector and is rotatable relative to the through hole in the circumferential direction, and the locking rod passes through and is threadedly engaged with the threaded hole on the rotating connector.

[0037] Implementing this invention offers the following advantages: Thanks to its double-door structural design, both the outer and inner doors work together to provide radiation shielding and facilitate personnel and equipment access. The reduced weight and volume of individual doors also meet the requirements of on-site installation and seismic design. Thus, it effectively protects personnel and equipment (due to superior shielding), solves the problem of ease of access, and ensures on-site feasibility while meeting seismic design requirements. Attached Figure Description

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of the reactor radiation shielding door from one perspective according to an embodiment of the present invention;

[0040] Figure 2 yes Figure 1 A front view of the reactor radiation shielding door;

[0041] Figure 3 yes Figure 2 Sectional view A1-A1;

[0042] Figure 4 yes Figure 2 Sectional view A2-A2;

[0043] Figure 5 yes Figure 4 Enlarged diagram of part B;

[0044] Figure 6 yes Figure 4 A schematic diagram of the structure from a C-angle perspective;

[0045] Figure 7 This is a top view of a reactor radiation shielding door in the open state according to an embodiment of the present invention;

[0046] Figure 8 yes Figure 7 Enlarged schematic diagram of part F;

[0047] Figure 9 yes Figure 7 EE sectional view;

[0048] Figure 10This is a schematic diagram of the inner door locking assembly of an embodiment of the reactor radiation shielding door of the present invention;

[0049] Figure 11 This is a schematic diagram of the inner door locking assembly of another embodiment of the reactor radiation shielding door of the present invention. Detailed Implementation

[0050] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0051] The terms "first" and "second" are used only for the convenience of describing the technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0052] As described in the background section, although existing technologies have attempted to explore the design of hinged doors, the design of a single, single-leaf door cannot meet the requirements of on-site installation, seismic design, or the passage requirements for personnel and equipment. Specifically, to meet the shielding function, a single, single-leaf door requires a large weight and volume, which cannot meet seismic design requirements, and it cannot be installed due to the limited space on site; at the same time, the thickness of a single, single-leaf door itself occupies a large space, which cannot meet the passage requirements for personnel and equipment. To solve this technical problem:

[0053] like Figures 1 to 11 As shown, a reactor radiation shielding door according to an embodiment of the present invention includes a main frame 1, a door gap sealing unit 2, an inner door leaf 3, and an outer door leaf 4. The inner door leaf 3 is closer to the reactor core than the outer door leaf 4; that is, the inner door leaf 3 is closer to the source term than the outer door leaf 4.

[0054] Furthermore, in this embodiment, the thickness of the outer door leaf 4 is greater than the thickness of the inner door leaf 3.

[0055] The main frame 1 is built at the civil engineering opening on the shielding structure 5, and the edge of the main frame 1 is embedded into the civil engineering opening along the perimeter of the opening. In this way, less space is occupied around the shielding structure 5.

[0056] A door opening is formed on the main frame 1. The door gap sealing unit 2 is adapted to the wall of the door opening.

[0057] When the door is closed, the inner door leaf 3 and the outer door leaf 4 are respectively fitted to the opposite sides of the door gap sealing unit 2, and together with the door gap sealing unit 2, they block the door opening to shield radiation.

[0058] When the door is open, the inner door 3 and the outer door 4 open in opposite directions, creating a passage for personnel and equipment at the door opening. For example... Figure 6As shown, the two opposite directions are D1 and D2. The inner door 3 opens along the D1 direction, and the outer door 4 opens along the D2 direction. This ensures that when personnel are carrying equipment, they can pass through the passage by slightly changing their walking direction.

[0059] Therefore, the outer door leaf 4 and the inner door leaf 3 together meet the requirements of radiation shielding and personnel and equipment passage. The weight and volume of a single door are reduced, which can meet the requirements of on-site installation and seismic design. In this way, it can effectively protect personnel and equipment (good shielding effect), solve the problem of convenient passage, and ensure on-site implementation and meet the requirements of seismic design.

[0060] In this embodiment, there are six civil engineering openings on the shielding structure 5. Three of these openings require the passage of personnel and equipment; therefore, reactor radiation shielding doors are correspondingly installed at these three openings, for a total of three sets of reactor radiation shielding doors. It is understood that in other embodiments, the number of reactor radiation shielding doors on the shielding structure 5 can be flexibly adjusted according to the passage requirements of personnel and equipment, taking into account the site conditions.

[0061] Furthermore, a pipe clearance hole 10 is formed on the main frame 1 for pipes to pass through. That is, the main frame 1 is provided with both a pipe clearance hole 10 and a door hole.

[0062] During the design phase, the pipe clearance holes on the main frame 1 correspond to the positions of existing pipes on site. This ensures that when the main frame 1 is installed at the civil engineering opening, it provides just the right amount of clearance space for pipes to pass through. In this way, it can fully adapt to the existing structure of the shielding structure 5 in the existing nuclear power plant, minimizing the amount of modification work and reducing costs.

[0063] Furthermore, the reactor radiation shielding door of the present invention can be applied not only to the renovation of existing projects, but also to the supporting construction of new units, demonstrating excellent adaptability.

[0064] Furthermore, in this embodiment, the door gap sealing unit 2 includes a horizontal frame 20 and two vertical frames 21;

[0065] Two vertical frames 21 are fixed to the two opposite inner walls of the door opening respectively; a horizontal frame 20 is fixed to the inner top wall of the door opening and connected between the two vertical frames 21.

[0066] Preferably, the transverse frame 20 and the vertical frame 21 are hollow structures with a steel outer shell and filled with radiation shielding material. This provides reliable structural strength from the outer shell, while the hollow interior results in a lighter overall weight, facilitating on-site assembly and transportation, and meeting seismic design requirements.

[0067] Understandably, in other embodiments, the door gap sealing unit 2 may also be an integrally formed steel structure with radiation shielding function.

[0068] The horizontal frame 20 and the two vertical frames 21 can be integrally formed or they can be separate components assembled on-site.

[0069] Furthermore, in this embodiment, a double-hinge structure is used for opening the outer door leaf 4; and a single-hinge structure is used for opening the inner door leaf 3.

[0070] Corresponding to the opening of the outer door 4, the reactor radiation shielding door also includes an outer door hinge; the outer door hinge includes a first outer door pivot 41, a connecting frame 40, and a second outer door pivot 42, forming a double door hinge structure.

[0071] The first outer door pivot 41 is hinged to the outer wall of the shielding structure 5; the second outer door pivot 42 is hinged to the outer door leaf 4 and is parallel to the first outer door pivot 41; the connecting frame 40 is connected between the first outer door pivot 41 and the second outer door pivot 42 to realize the rotation of the outer door leaf 4.

[0072] like Figure 1 As shown, a civil engineering connector 43 is provided between the outer wall of the shielding structure 5 and the first outer door hinge 41. The civil engineering connector 43 provides a rooting point for the installation of the first outer door hinge 41. The civil engineering connector 43 is welded to an embedded plate on the outer wall of the shielding structure 5, and the first outer door hinge 41 is bolted to the civil engineering connector 43. The civil engineering connector 43 can be formed by splicing and welding plates, or it can be integrally formed.

[0073] The dual-axis structure maximizes the opening space of the outer door leaf 4 along the D2 direction, making full use of the blank area on the outside of the outer door leaf 4 and increasing the space for personnel and equipment to pass through. Understandably, in other embodiments, depending on the actual space conditions on site, the outer door leaf 4 may also adopt a single-axis structure for opening.

[0074] Furthermore, in this embodiment, bearings (not shown) are provided on the first outer door pivot 41 and / or the second outer door pivot 42, which helps to reduce the opening force of the outer door leaf 4, improve its opening stability, and help meet the seismic strength requirements. The bearings can be thrust bearings.

[0075] Depending on the actual needs, a bearing may be installed only on the first outer door hinge 41; or only on the second outer door hinge 42; or both the first outer door hinge 41 and the second outer door hinge 42 may be installed simultaneously, so as to minimize the opening force of the outer door leaf 4, improve its opening stability, and meet the seismic strength requirements.

[0076] Corresponding to the opening of the inner door 3, the reactor radiation shielding door also includes an inner door hinge, which includes a first hinge 31, an inner door pivot 30, and a second hinge 32.

[0077] The first hinge 31 is connected to the inner wall of the shielding structure 5; the second hinge 32 is connected to the inner door leaf 3, and the inner door pivot 30 is connected between the first hinge 31 and the second hinge 32 to realize the rotation of the inner door leaf 3.

[0078] As mentioned above, unlike the opening of the outer door leaf 4, the opening of the inner door leaf 3 is only considered to be a single-hinge structure. This configuration is based on the specific site environment in this embodiment. In other embodiments, depending on the actual space conditions, the inner door leaf 3 can also adopt a double-hinge structure. When the inner door leaf 3 adopts a double-hinge structure, the double-hinge structure on the outer door leaf 4 in this embodiment can be referenced.

[0079] Furthermore, a bearing (not shown) can also be installed on the inner door hinge 30, which helps to reduce the opening force of the inner door leaf 3, improve its opening stability, and help meet the seismic strength requirements. The bearing can be a thrust bearing.

[0080] Furthermore, in this embodiment, as Figure 8 As shown, corner transition areas 23 are formed on the two opposite surfaces of the door gap sealing unit 2.

[0081] The surfaces of the inner door leaf 3 facing the door gap sealing unit 2 and the outer door leaf 4 facing the door gap sealing unit 2 are both formed with arc surfaces or slopes that are adapted to the corner transition area 23. In this way, when the door is closed, the outer door leaf 4 and the inner door leaf 3 can fit tightly against the door gap sealing unit 2.

[0082] Correspondingly, the shape of the corner transition area 23 can be a slope or an arc. When the corner transition area 23 is an arc, a matching arc is formed on the surface of the inner door leaf 3 facing the door gap filling unit 2 and on the surface of the outer door leaf 4 facing the door gap filling unit 2; when the corner transition area 23 is a slope, a matching slope is formed on the surface of the inner door leaf 3 facing the door gap filling unit 2 and on the surface of the outer door leaf 4 facing the door gap filling unit 2.

[0083] By using beveled or curved surfaces, the outer door leaf 4 and the inner door leaf 3 can be tightly fitted to the door gap sealing unit 2. More importantly, considering that rays are straight lines, the curved or beveled fit is designed to ensure that no rays penetrate the gap while maximizing the shielding effect.

[0084] Furthermore, in this embodiment, the inner door leaf 3 includes a hollow inner door frame and radiation shielding material filled within the inner door frame. And / or, the outer door leaf 4 includes a hollow outer door frame and radiation shielding material filled within the outer door frame.

[0085] Radiation shielding materials can be made using thermosetting epoxy resin as a matrix, with the addition of boron and fire retardants. This results in high-temperature resistance and flame retardancy. Furthermore, the liquid-mix casting process allows for conformal manufacturing. When filled within a frame, the radiation shielding material ensures overall structural strength. It is also suitable for neutron or gamma-ray shielding and can withstand high-temperature or high-humidity environments.

[0086] Different radiation shielding materials can be flexibly selected depending on the source of the radiation.

[0087] Both the inner door leaf 3 and the outer door leaf 4 adopt a hollow frame structure, which facilitates on-site assembly and transportation, and is conducive to meeting the requirements of severe accidents and earthquake conditions.

[0088] In other embodiments, the inner door leaf 3 may be configured to include only a hollow inner door frame and radiation shielding material filled within the inner door frame, while the outer door leaf 4 is an integral structure; or the outer door leaf 4 may be configured to include only a hollow outer door frame and radiation shielding material filled within the outer door frame, while the inner door leaf 3 is an integral structure.

[0089] Furthermore, such as Figure 7-9 As shown, the inner door frame has multiple inner door filling cavities 33 arranged along its length for filling with radiation shielding material. The radiation shielding material can be poured into the inner door filling cavity 33 (or outer door filling cavity) as a liquid mixture to form an inner door leaf 3 or an outer door leaf 4 with radiation shielding function.

[0090] The boundary between adjacent inner door filling cavities 33 is a shape such as a bevel, a step, or a sawtooth to prevent radiation penetration.

[0091] Similarly, the outer door frame has multiple outer door filling cavities (not shown, but refer to inner door filling cavity 33) arranged along its length for filling radiation shielding material; the boundary (or gap) between adjacent outer door filling cavities is a bevel, stepped, or sawtooth shape to prevent radiation penetration.

[0092] Specifically, since the rays are straight lines, when the boundary (or gap) between adjacent inner door filling cavities 33 is a bevel, a step, or a serrated shape, the rays cannot pass through in a straight line, thus minimizing ray leakage.

[0093] like Figure 9As shown, in the case of the bevel, each inner door filling cavity 33 (or outer door filling cavity) is approximately triangular prism-shaped, so the boundary between adjacent inner door filling cavities 33 (or outer door filling cavities) is bevel-shaped.

[0094] Furthermore, in this embodiment, for ease of understanding, please refer to the following key points. Figure 1 , Figure 2 , Figure 5 , Figure 8 The reactor radiation shielding door also includes an outer door locking assembly installed between the main frame 1 and the outer door leaf 4. During the closing phase, the outer door locking assembly can further lock the main frame 1 and the outer door leaf 4, enhancing the sealing effect between the outer door leaf 4 and the main frame 1, or between the outer door leaf 4 and the door gap sealing unit 2.

[0095] Furthermore, in this embodiment, the outer door locking assembly includes a handwheel 6, a connecting seat 60, and a hinge bolt (not shown in the figure). The connecting seat 60 is disposed on the outer door leaf 4. The hinge bolt passes through the connecting seat 60, with one end connected to the handwheel 6 and the other end connected to the main frame 1.

[0096] Specifically, after the outer door leaf 4 is closed, the length of the hinge bolt is adjusted by turning the handwheel 6 to press the connecting seat 60 onto the main frame 1, thereby locking the outer door leaf 4 and the main frame 1. It is understood that in other embodiments, other specific forms of outer door locking assemblies may also be used.

[0097] Please see Figure 5 , Figure 10 , Figure 11 Furthermore, in this embodiment, the reactor radiation shielding door also includes an inner door locking assembly.

[0098] The inner door locking assembly is installed on the inner door leaf 3, and in the closed state, the inner door locking assembly is located inside the door hole. That is, in the closed state, the inner door locking assembly is located on the door surface of the inner door leaf 3 facing the outer door leaf 4, and its function is to further lock the inner door leaf 3 into the door hole on the main frame 1 after the inner door leaf 3 is closed.

[0099] The inner door locking assembly locks the inner door leaf 3 to the side wall of the door opening; and / or, the inner door locking assembly locks the inner door leaf 3 to the bottom wall of the door opening.

[0100] Specifically, inner door locking components can be installed at the upper and lower positions of the inner door leaf 3, thereby locking the inner door leaf 3 simultaneously to the side wall and bottom wall of the door opening. Alternatively, in other embodiments, the inner door leaf 3 may be locked only to the side wall or the bottom wall of the door opening. Preferably, locking the inner door leaf 3 simultaneously to the side wall and bottom wall of the door opening can maximize the sealing effect between the inner door leaf 3 and the door opening, or between the inner door leaf 3 and the door gap sealing unit.

[0101] For example, you can refer to Figures 10 to 11 , Figure 10 In the illustrated embodiment, the inner door locking assembly can lock the inner door leaf 3 to the bottom wall of the door hole; Figure 11 In the illustrated embodiment, the inner door locking assembly can lock the inner door leaf 3 to the side wall of the door opening. One or more sets of inner door locking assemblies, from the same embodiment or two different embodiments, can be provided depending on the actual site conditions.

[0102] Furthermore, in this embodiment, the inner door locking assembly includes a base plate assembly 90 disposed on the inner door leaf 3 and a locking rod 91 disposed on the base plate assembly 90. The side wall and / or bottom wall of the door opening are provided with locking holes (not shown) that match one end of the locking rod 91. When the door is closed, inserting one end of the locking rod 91 into the corresponding locking hole will lock the inner door leaf 3 to the side wall and / or bottom wall of the door opening.

[0103] Specifically, when the inner door locking assembly only locks the inner door leaf 3 to the side wall of the door opening, a corresponding locking hole can be provided on the side wall of the door opening. Alternatively, when the inner door locking assembly only locks the inner door leaf 3 to the bottom wall of the door opening, a corresponding locking hole can be provided on the bottom wall of the door opening. Furthermore, when the inner door locking assembly locks the inner door leaf 3 to both the side wall and the bottom wall of the door opening, corresponding locking holes can be provided on both the side wall and the bottom wall of the door opening respectively.

[0104] Furthermore, in this embodiment, the locking rod 91 is a screw, and the locking rod 91 is inserted into the corresponding locking hole for fastening by rotating the locking rod 91 to drive its extension and retraction.

[0105] Correspondingly, the inner door locking assembly also includes a locking component. The locking component includes a locking lever 92 and a locking pivot 93. The locking pivot 93 is disposed between the opposite end of the locking lever 91 and the locking lever 92.

[0106] Furthermore, the locking lever 92 can rotate back and forth between the first position and the second position around the locking pivot 93:

[0107] In the first position, the locking lever 92 and the locking rod 91 are coaxially arranged. Rotating the locking lever 92 in this position causes the locking rod 91 to rotate and extend / retract along its length, thereby inserting the locking rod 91 into the corresponding locking hole along its length. In the second position, the locking lever 92 and the locking rod 91 are arranged at an angle, and as shown... Figure 10-11 As shown, the locking lever 92 can be perpendicular to the locking lever 91, thereby axially positioning the locking lever 91 and preventing the locking lever 91 from shifting axially after being inserted into the locking hole, which could lead to a poor seal of the inner door leaf.

[0108] Furthermore, the base plate assembly 90 includes a base plate body 901, a lock base 902, a lock shaft 903, and a rotating connector 904;

[0109] The base plate body 901 is mounted on the inner door leaf 3. The lock base 902 is mounted on the base plate body 901. The lock shaft 903 passes through the lock base 902. The rotating connector 904 is provided with a through hole (not shown) and a threaded hole (not shown). The lock shaft 903 passes through the through hole on the rotating connector 904 and can rotate circumferentially relative to the inner wall of the through hole. The locking rod 91 passes through and is threaded into the threaded hole on the rotating connector 904.

[0110] Specifically, the rotating connector 904 can rotate circumferentially around the locking shaft 903, thereby driving the locking rod 91 to rotate around the locking shaft 903, so that the locking rod 91 has a certain position adjustment space to match the angle of the corresponding locking hole on site, reserving a certain position error adjustment space for on-site construction, ensuring that the locking rod 91 can be accurately inserted into the corresponding locking hole on site, so that the two are tightly fitted together.

[0111] In addition, depending on the site conditions, the main frame 1 can also adopt a hollow frame structure filled with radiation shielding material to minimize radiation leakage.

[0112] To meet on-site transportation and installation needs and facilitate on-site implementation, the components (main frame 1, door gap filling unit 2, inner door leaf 3, outer door leaf 4) can be modularized to limit the length and weight of individual components or smaller units.

[0113] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A reactor radiation shielding door characterized by, The application relates to a reactor radiation shielding door which comprises a main frame (1), a door gap filling unit (2), an inner door leaf (3) and an outer door leaf (4). The main frame (1) is built on a shielding structure (5), a door hole is formed on the main frame (1), and the door gap filling unit (2) is adapted to the hole wall of the door hole. The door gap filling unit (2) comprises a horizontal frame (20) and two vertical frames (21), the two vertical frames (21) are respectively fixed on the opposite two inner side walls of the door hole, the horizontal frame (20) is fixed on the inner top wall of the door hole and connected between the two vertical frames (21), the opposite two surfaces of the door gap filling unit (2) are provided with corner transition areas (23), and the surface of the inner door leaf (3) facing the door gap filling unit (2) and the surface of the outer door leaf (4) facing the door gap filling unit (2) are respectively provided with arc surfaces or inclined surfaces matched with the corner transition areas (23). The reactor radiation shielding door further comprises an inner door locking assembly. The inner door locking assembly is arranged on the inner door leaf (3) and located in the door hole in the closed state, the inner door locking assembly locks the inner door leaf (3) with the side wall of the door hole and / or the bottom wall of the door hole, the inner door locking assembly comprises a bottom plate assembly (90) arranged on the inner door leaf (3) and a locking rod (91) arranged on the bottom plate assembly (90), and the side wall and / or the bottom wall of the door hole is provided with a locking hole matched with one end of the locking rod (91). The locking rod (91) is a screw rod. The inner door locking assembly further comprises a locking assembly, the locking assembly comprises a lock hand rocker (92) and a locking shaft (93), the locking shaft (93) is arranged between the opposite end of the locking rod (91) and the lock hand rocker (92), the lock hand rocker (92) can rotate back and forth between a first position and a second position around the locking shaft (93), in the first position, the lock hand rocker (92) and the locking rod (91) are coaxially arranged, and in the second position, the lock hand rocker (92) and the locking rod (91) are arranged at an angle. The bottom plate assembly (90) comprises a bottom plate body (901), a lock base (902), a lock shaft (903) and a rotary connecting piece (904). The bottom plate body (901) is arranged on the inner door leaf (3), the lock base (902) is arranged on the bottom plate body (901), the lock shaft (903) is arranged in the lock base (902), the rotary connecting piece (904) is provided with a through hole and a threaded hole, the lock shaft (903) passes through the through hole of the rotary connecting piece (904) and can rotate around the through hole in the circumferential direction, and the locking rod (91) passes through and is threadedly connected to the threaded hole of the rotary connecting piece (904). In the closed state, the inner door leaf (3) and the outer door leaf (4) are respectively fitted on the opposite sides of the door gap filling unit (2), together with the door gap filling unit (2) to block the door hole to shield radiation; In the open state, the inner door leaf (3) and the outer door leaf (4) are respectively opened in opposite directions to form a passage for personnel and equipment to pass through at the door hole.

2. The reactor radiation shield door of claim 1, wherein, The transverse frame (20) and the vertical frame (21) are hollow structures, which are filled with radiation shielding materials.

3. The reactor radiation shield door of claim 1, wherein, The reactor radiation shielding door further comprises an outer door hinge; the outer door hinge comprises a first outer door pivot (41), a connecting frame (40), and a second outer door pivot (42); The first outer door pivot (41) is hinged to the outer wall of the shielding structure (5); the second outer door pivot (42) is hinged to the outer door leaf (4) and is parallel to the first outer door pivot (41); the connecting frame (40) is connected between the first outer door pivot (41) and the second outer door pivot (42).

4. The reactor radiation shield door of claim 3, wherein, Bearings are arranged on the first outer door pivot (41) and / or the second outer door pivot (42).

5. The reactor radiation shield door of claim 1, wherein, The reactor radiation shielding door further comprises an inner door hinge, which comprises a first hinge leaf (31), an inner door pivot (30), and a second hinge leaf (32); The first hinge leaf (31) is connected to the inner wall of the shielding structure (5); the second hinge leaf (32) is connected to the inner door leaf, and the inner door pivot (30) is connected between the first hinge leaf (31) and the second hinge leaf (32).

6. The reactor radiation shield door of claim 5, wherein, Bearings are arranged on the inner door pivot (30).

7. The reactor radiation shield door according to any one of claims 1-6, characterized in that, The inner door leaf (3) comprises a hollow inner door frame and radiation shielding materials filled in the inner door frame; and / or, the outer door leaf (4) comprises a hollow outer door frame and radiation shielding materials filled in the outer door frame.

8. The reactor radiation shield door of claim 7, wherein, A plurality of inner door filling cavities (33) for filling radiation shielding materials are arranged along the length direction of the inner door frame; the boundaries between adjacent inner door filling cavities (33) are bevels, steps, or zigzags; A plurality of outer door filling cavities for filling radiation shielding materials are arranged along the length direction of the outer door frame; the boundaries between adjacent outer door filling cavities are bevels, steps, or zigzags.

9. The reactor radiation shield door according to any one of claims 1-6, wherein, The reactor radiation shielding door further comprises an outer door locking assembly arranged between the main frame (1) and the outer door leaf (4).

10. The reactor radiation shield door of claim 9, wherein, The outer door locking assembly comprises a hand wheel (6), a connecting seat (60), and a hinged bolt; The connecting seat (60) is arranged on the outer door leaf (4); the hinged bolt passes through the connecting seat (60), and one end of the hinged bolt is connected to the hand wheel (6), and the opposite end is connected to the main frame (1).

11. The reactor radiation shield door according to any one of claims 1-6, wherein, The main frame (1) is further provided with a pipeline avoiding hole (10) for pipelines to pass through.

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