Multilayer composite radiation shielding wall

Abstract

The utility model relates to the technical field of radiation protection wall, especially to a multilayer composite radiation protection wall, which comprises: a concrete wall body serving as a basic structure of the multilayer composite radiation protection wall; a plurality of protection assemblies covering the inner side of the concrete wall body, which comprises: a polyethylene plate including an inner side facing the concrete wall body and an outer side facing away from the concrete wall body; an inner lead plate arranged between the inner side of the polyethylene plate and the concrete wall body; and an outer lead plate arranged on the outer side of the polyethylene plate. The scheme is used to solve the defects of the prior art, i.e., the whole lead plate of the radiation protection wall leads to inconvenient transportation, needs to be installed in advance, and is difficult to adjust according to the layout in the later period, so as to achieve the purposes of flexible adaptation to different use scenarios and improvement of the radiation protection effect.

Description

Technical Field

[0001] This utility model relates to the field of radiation shielding wall technology, and in particular to a multi-layer composite radiation shielding wall. Background Technology

[0002] In the field of nuclear medicine, the safe storage of radiopharmaceuticals is directly related to the radiation safety of the surrounding environment and personnel. Therefore, extremely high requirements are placed on the radiation-proof walls of the storage room. An efficient and reliable radiation-proof wall structure is one of the core elements to ensure storage safety.

[0003] Currently, the construction of existing radiation shielding walls typically revolves around the following key technologies: In terms of shielding layer technology, high-density materials such as lead plates and boron-containing polyethylene are often used as the main radiation shielding layer to block the spread of radioactive radiation; in terms of structural support technology, concrete and steel frame structures are commonly used to construct the basic support structure of the wall. Among them, concrete and steel frame structures, with their high strength and stability, can effectively bear the weight of the wall itself and possible external loads; in terms of sealing technology, materials such as sealing strips and sealing coatings are used to treat gaps and holes in the wall to prevent the leakage of radioactive materials.

[0004] However, existing radiation-shielding walls still have significant limitations in practical applications. Their radiation protection largely relies on embedding a single piece of lead plate within the wall. This design results in a large lead plate, increasing transportation difficulties and requiring pre-installation during the construction phase. If the layout of the storage room is adjusted later, such as changing the location of radiopharmaceuticals, this fixed, single-piece lead plate structure is difficult to adapt flexibly, causing significant inconvenience in actual use. Utility Model Content

[0005] This utility model provides a multi-layer composite radiation shielding wall to solve the defects of existing radiation shielding walls that use a single piece of lead plate, resulting in inconvenient transportation, the need for advance installation, and difficulty in adjusting the layout later. It aims to achieve flexible adaptation to different usage scenarios and improve the radiation protection effect.

[0006] This utility model provides a multi-layer composite radiation shielding wall, comprising: a concrete wall, serving as the basic structure of the multi-layer composite radiation shielding wall; and protective components, a plurality of which cover the inner side of the concrete wall, including: a polyethylene board, the polyethylene board having an inner side facing the concrete wall and an outer side facing away from the concrete wall; an inner lead plate, disposed between the inner side of the polyethylene board and the concrete wall; and an outer lead plate, disposed on the outer side of the polyethylene board.

[0007] According to one embodiment of the present invention, the side edge of the polyethylene plate is provided with a mating surface whose shape complements that of the side edge of the adjacent polyethylene plate; when the polyethylene plates of the multiple protective components are assembled, the inner lead plate and the outer lead plate on both sides of the polyethylene plate are misaligned through the mating surface whose shape complements that.

[0008] According to one embodiment of the present invention, the two mating surfaces of the opposite side edges of the polyethylene sheet are inclined surfaces with complementary angles; or, the two mating surfaces of the opposite side edges of the polyethylene sheet are stepped surfaces with complementary shapes in both the thickness direction and the surface direction.

[0009] According to one embodiment of the present invention, the protective component further includes a retaining strip; the retaining strip simultaneously engages with the inner lead plate, the polyethylene plate, and the outer lead plate for positioning.

[0010] According to one embodiment of the present invention, the inner lead plate, the polyethylene plate, and the outer lead plate are all provided with vertically penetrating mounting holes; the locking strip forms a structure of three parallel extending long rods, which are respectively used to insert into the mounting holes of the inner lead plate, the polyethylene plate, and the outer lead plate to form a limiting fit.

[0011] According to one embodiment of the present invention, the protective assembly further includes a retaining plate and a first nut, the first nut being rotatably disposed inside the retaining plate; when the long rod structure of the retaining strip passes through the mounting hole, the retaining plate is mounted to the end of the long rod structure by the first nut.

[0012] According to one embodiment of the present invention, a fixing component is detachably provided on the concrete wall; the fixing component, in the installed state, is used to limit and cooperate with at least a portion of the protective component to provide a holding force that keeps the protective component on the surface of the concrete wall.

[0013] According to one embodiment of the present invention, a plurality of mounting rods perpendicular to the surface of the concrete wall are fixedly installed on the concrete wall; the fixing component is detachably installed on the mounting rods.

[0014] According to one embodiment of the present invention, the fixing component includes: a polyethylene strip, the polyethylene strip having an inner side facing the concrete wall and an outer side facing away from the concrete wall; an inner lead strip disposed between the inner side of the polyethylene strip and the concrete wall; and an outer lead strip disposed on the outer side of the polyethylene strip; the polyethylene strip, the inner lead strip, and the outer lead strip are provided with mounting holes adapted to the mounting rod.

[0015] According to one embodiment of the present invention, the mounting rod is provided with a threaded structure; the fixing assembly further includes a second nut, which is used to be threaded onto the end of the mounting rod on the outer side of the outer lead strip.

[0016] This utility model provides a multi-layered composite radiation shielding wall. It uses a concrete wall as the base structure to ensure overall structural stability. Multiple independent protective components cover the inner side of the concrete wall. Each component includes a polyethylene sheet and inner and outer lead plates respectively located on its inner and outer sides, forming a multi-layered radiation shielding structure. This modular design not only enhances the radiation shielding effect through the combination of lead and polyethylene plates, but also facilitates transportation and installation due to the small size and moderate weight of each component. The installation position and range can be flexibly adjusted according to actual needs, effectively adapting to changes in future storage layouts and overcoming the limitations of traditional monolithic lead plate structures. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the multi-layer composite radiation shielding wall provided by this utility model.

[0019] Figure 2 This is an exploded structural diagram of the multi-layer composite radiation shielding wall provided by this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the protective component of the multi-layer composite radiation shielding wall provided by this utility model.

[0021] Figure 4 This is a cross-sectional structural diagram of the card plate of the multi-layer composite radiation-proof wall provided by this utility model.

[0022] Figure 5 This is a structural schematic diagram of the fixing components of the multi-layer composite radiation-proof wall provided by this utility model.

[0023] Figure label:

[0024] 1. Concrete wall; 2. Inner lead plate; 3. Polyethylene plate; 4. Outer lead plate; 5. Clip; 6. Clip plate; 7. First nut; 8. Mounting rod; 9. Inner lead strip; 11. Polyethylene strip; 12. Outer lead strip; 13. Second nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The multi-layer composite radiation shielding wall provided by this utility model is mainly, but not limited to, used in the radiopharmaceutical storage room of the nuclear medicine department. It aims to solve the problems of inconvenient transportation, the need for pre-installation, and difficulty in later adjustment caused by the use of a single piece of lead plate in existing radiation shielding walls. Its specific structure includes a concrete wall as the basic structure, with multiple protective components evenly installed on the inner side wall of the concrete wall, and fixing components between adjacent protective components.

[0028] The protective assembly preferably consists of an inner lead plate, a polyethylene plate, an outer lead plate, a retaining strip, a retaining plate, and a first nut. The inner and outer lead plates are located on opposite sides of the polyethylene plate, each with mounting holes. The three long rods of the retaining strip pass through the mounting holes in the inner, polyethylene, and outer lead plates, respectively. The retaining plate is installed at the end of the retaining strip. The first nut is threaded into the mounting hole of the middle retaining strip and located inside the retaining plate. The inner, polyethylene, and outer lead plates are assembled and fixed through the cooperation of the retaining strip and the retaining plate. Mounting rods are uniformly fixed to the concrete wall. The fixing assembly includes an inner lead strip, a polyethylene strip, an outer lead strip, and a second nut. The inner and outer lead strips are located at both ends of the polyethylene strip, with the polyethylene strip positioned between adjacent inner and outer lead strips. The fixing assembly is installed entirely on the mounting rod, and the second nut is threaded into the end of the mounting rod for fixation.

[0029] During installation, installation holes can be made in the poured concrete wall first, and the installation rod can be fixed in the installation holes. Then, the inner lead plate and outer lead plate are aligned and attached to the polyethylene plate, and the clip is inserted into the through hole of the three. The clip is then put on the end of the clip and tightened with the first nut to complete the assembly of a single protective component. After that, the inner lead strip and polyethylene strip are installed on the installation rod in sequence, and then multiple assembled protective components are arranged in order. Finally, the outer lead strip is installed and tightened with the second nut to make the outer lead strip hold the upper and lower protective components in place, forming an integral structure.

[0030] In the preferred structural design, the polyethylene panels are assembled using a staggered bonding method, causing the inner and outer lead plates to be misaligned. This effectively covers the seams and prevents radiation leakage along the joints. Furthermore, the modular design of the protective components not only facilitates transportation but also allows for flexible installation and adjustments based on building plans, significantly improving the convenience and adaptability of the wall structure.

[0031] The following is combined with Figures 1 to 5 This invention describes the specific implementation of the multi-layer composite radiation shielding wall.

[0032] like Figure 1 and Figure 2As shown, this utility model provides a multi-layer composite radiation shielding wall, comprising: a concrete wall 1, serving as the basic structure of the multi-layer composite radiation shielding wall; and protective components, multiple protective components covering the inner side of the concrete wall 1, including: a polyethylene board 3, the polyethylene board 3 having an inner side facing the concrete wall 1 and an outer side facing away from the concrete wall 1; an inner lead plate 2, disposed between the inner side of the polyethylene board 3 and the concrete wall 1; and an outer lead plate 4, disposed on the outer side of the polyethylene board 3. Specifically, this solution uses the concrete wall 1 as the basic support for the entire radiation shielding wall, providing a stable foundation for the subsequent installation of protective components, and possessing a certain structural strength and basic radiation shielding capability. Multiple independent protective components serve as the core protective structure covering the inner side of the concrete wall 1. Each protective component adopts a three-layer composite structure design: the inner lead plate 2 is set close to the concrete wall 1, the middle polyethylene plate 3 is attached to the outer side of the inner lead plate 2 and the inner side of the outer lead plate 4 respectively, and the outer lead plate 4 forms the outermost barrier of the protective component. The combination of the inner lead plate 2, polyethylene plate 3 and outer lead plate 4 forms a multi-layer radiation shielding unit.

[0033] In practical applications, the aforementioned multi-layered composite radiation shielding wall is mainly used in scenarios with strict radiation protection requirements, such as radiopharmaceutical storage rooms in nuclear medicine departments. Its technical principle is based on the radiation shielding properties of different materials to achieve efficient protection: the inner lead plate 2 and outer lead plate 4, with their high density, can effectively block highly penetrating radioactive rays such as gamma rays. The two layers of lead plates form a double barrier, significantly improving the shielding effect against these types of rays. The polyethylene plate 3 sandwiched in the middle mainly acts as a shield against neutron radiation. Simultaneously, it isolates the inner and outer lead plates 4, preventing wear caused by direct contact. Furthermore, when multiple protective components are assembled, the staggered arrangement of the polyethylene plate 3 can cause the inner and outer lead plates 4 to misalign, thereby covering the seams and preventing radiation leakage along the seams.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, according to this utility model, a multi-layer composite radiation shielding wall has a side edge of polyethylene board 3 with a mating surface whose shape complements that of the side edge of adjacent polyethylene boards 3. When multiple protective components of polyethylene boards 3 are assembled, the inner lead plates 2 and outer lead plates 4 on both sides of the polyethylene board 3 are misaligned through the mating surfaces with complementary shapes. Specifically, by designing complementary mating surfaces on the side edges of the polyethylene boards 3, adjacent polyethylene boards 3 can be precisely fitted together during assembly. This structural design forces the inner lead plates 2 and outer lead plates 4 on both sides to not be completely aligned, forming a natural misaligned layout, thereby effectively covering the gaps at the joints and preventing radiation from penetrating and leaking through the gaps, further improving the overall radiation shielding performance of the wall.

[0035] Furthermore, according to the multi-layer composite radiation shielding wall of this utility model, the two mating surfaces of the opposite side edges of the polyethylene board 3 are inclined surfaces with complementary angles; or, the two mating surfaces of the opposite side edges of the polyethylene board 3 are stepped surfaces with complementary shapes in both the thickness direction and the surface direction. When the inclined surface design with complementary angles is adopted, the side edges of adjacent polyethylene boards 3 are joined by inclined surfaces with matching inclination angles, so that the spliced ​​polyethylene boards 3 form a continuous whole, while causing the inner lead plates 2 and outer lead plates 4 on both sides to shift in position along the inclined surface direction, achieving staggered shielding; while when the stepped surface design is adopted, the mating surfaces form interlocking stepped structures in both the thickness direction and the surface direction of the polyethylene board 3, which not only enhances the stability of splicing, but also causes the inner lead plates 2 and outer lead plates 4 to be staggered in the surface direction, more comprehensively covering the splicing gaps, so as to optimize the radiation shielding effect. Both designs can achieve the staggered layout of the inner lead plates 2 and outer lead plates 4 through the precise mating of the polyethylene boards 3, ensuring the continuity and reliability of radiation shielding.

[0036] like Figure 2 , Figure 3 and Figure 4 As shown, according to the present invention, a multi-layer composite radiation shielding wall includes a retaining strip 5. The retaining strip 5 simultaneously engages with the inner lead plate 2, the polyethylene plate 3, and the outer lead plate 4 for positioning. As the core connector of the shielding component, the retaining strip 5, through the positioning structure formed with the inner lead plate 2, the polyethylene plate 3, and the outer lead plate 4, tightly integrates the three into a whole, ensuring that no relative displacement occurs during installation and use. This guarantees the stability of the multi-layer shielding structure and prevents the radiation shielding effect from being affected by misalignment of the plates.

[0037] Furthermore, according to this utility model, a multi-layer composite radiation shielding wall is provided, with vertically penetrating mounting holes on the inner lead plate 2, polyethylene plate 3, and outer lead plate 4. The retaining strip 5 has three parallel extending long rods, which are respectively inserted into the mounting holes of the inner lead plate 2, polyethylene plate 3, and outer lead plate 4 to form a limiting fit. The mounting holes on the inner lead plate 2, polyethylene plate 3, and outer lead plate 4 correspond to each other, and the three long rods of the retaining strip 5 are adapted to pass through these three mounting holes. Precise positioning is achieved through the tight fit between the long rods and the hole walls, ensuring that the inner lead plate 2, polyethylene plate 3, and outer lead plate 4 are strictly aligned according to the preset layered structure. This ensures the tight fit between the panels and avoids misalignment during assembly, laying the foundation for subsequent fixing.

[0038] Furthermore, according to the multi-layer composite radiation shielding wall of this utility model, the protective component also includes a retaining plate 6 and a first nut 7, the first nut 7 being rotatably disposed inside the retaining plate 6; when the long rod structure of the retaining strip 5 passes through the mounting hole, the retaining plate 6 is installed at the end of the long rod structure by the first nut 7. After the three long rods of the retaining strip 5 pass through the mounting holes of the inner lead plate 2, the polyethylene plate 3, and the outer lead plate 4 respectively, the retaining plate 6 is fitted onto the end of the long rod. By rotating the first nut 7 inside the retaining plate 6, the nut is tightly engaged with the threaded structure at the end of the long rod, thereby firmly fixing the retaining plate 6 to the long rod, ensuring the integrity and stability of the multi-layer structure, and preventing the shielding effect from decreasing due to loosening during use.

[0039] like Figure 1 , Figure 2 and Figure 5 As shown, according to this utility model, a multi-layer composite radiation shielding wall includes a detachable fixing component on the concrete wall 1. In the installed state, the fixing component engages with at least a portion of the protective components to provide a holding force that keeps the protective components on the surface of the concrete wall 1. Specifically, by engaging with the protective components, the fixing component stably constrains multiple protective components to the surface of the concrete wall 1, preventing the components from loosening or detaching during use and ensuring that the protective components remain tightly fitted to the concrete wall 1. This guarantees the structural stability and continuous radiation shielding effect of the entire radiation shielding wall. This detachable design also facilitates the maintenance, replacement, and layout adjustment of the protective or fixing components according to actual needs.

[0040] Furthermore, according to the multi-layer composite radiation shielding wall of this utility model, multiple mounting rods 8 perpendicular to the surface of the concrete wall 1 are fixedly installed on the concrete wall 1; the fixing component is detachably installed on the mounting rods 8. The mounting rods 8 are set perpendicular to the surface of the concrete wall 1, providing a clear and stable installation reference for the fixing component. The fixing component can be easily installed on the concrete wall 1 through the detachable connection with the mounting rods 8, and can be easily disassembled when needed, facilitating the adjustment, maintenance or replacement of the fixing component or the protective component. The setting of multiple mounting rods 8 enables the fixing component to fix the protective component at multiple points, improving the reliability and uniformity of the fixing.

[0041] Furthermore, according to the present invention, a multi-layer composite radiation shielding wall includes a fixing component comprising: a polyethylene strip 11, which has an inner side facing the concrete wall 1 and an outer side facing away from the concrete wall 1; an inner lead strip 9 disposed between the inner side of the polyethylene strip 11 and the concrete wall 1; and an outer lead strip 12 disposed on the outer side of the polyethylene strip 11. The polyethylene strip 11, the inner lead strip 9, and the outer lead strip 12 are provided with mounting holes adapted to the mounting rod 8. The polyethylene strip 11, the inner lead strip 9, and the outer lead strip 12 are fitted onto the mounting rod 8 through the mounting holes, forming a multi-layer structure similar to a protective component. The inner lead strip 9 and the outer lead strip 12 can utilize their high-density characteristics to enhance the radiation shielding capability at the location of the fixing component, while the polyethylene strip 11 is mainly used to shield neutron radiation and also serves to isolate the inner lead strip 9 and the outer lead strip 12. The synergistic effect of the three components allows the fixing component to not only fix the protective component but also participate in the radiation shielding work, compensating for any weak points in the radiation shielding between the protective components.

[0042] Furthermore, according to the multi-layer composite radiation shielding wall of this utility model, the mounting rod 8 is provided with a threaded structure; the fixing component also includes a second nut 13, which is used to be threaded onto the end of the mounting rod 8 on the outer side of the outer lead strip 12. After the polyethylene strip 11, inner lead strip 9, and outer lead strip 12 are sleeved on the mounting rod 8 through the assembly hole, tightening the second nut 13 on the threaded structure of the mounting rod 8 on the outer side of the outer lead strip 12 can apply pressure to the fixing component in the direction of the concrete wall 1, so that the fixing component fits tightly against the protective component and the concrete wall 1. This threaded connection method is not only firmly fixed, but also facilitates the adjustment of the tightness of the fixing component, ensuring that the fixing component can provide a stable holding force for the protective component, thereby ensuring the stability of the entire radiation shielding wall structure.

[0043] During the installation and fixing of the fixing component to the protective component, the limiting effect can be enhanced through structural adaptation design: a stepped structure is set on the edge part (such as the side edge or upper and lower edge) of the protective component, and this stepped structure forms a height difference along the thickness direction or surface direction of the protective component; at the same time, a limiting stepped structure with complementary shape is set on the corresponding contact part of the fixing component and the protective component. When the fixing component is installed on the mounting rod 8 and is in working condition, the limiting stepped structure of the fixing component and the stepped structure of the protective component interlock with each other to form a precise mechanical limit. This structural cooperation can provide lateral and longitudinal constraints on one or several edges or specific parts of the protective component, effectively limiting the displacement of the protective component on the surface of the concrete wall 1, ensuring that the protective component fits tightly against the wall surface, and enhancing the stability of the overall structure.

[0044] According to the preferred embodiment of this utility model, the multi-layer composite radiation shielding wall can be installed using the following steps: First, install holes are made in the poured concrete wall 1, and then the installation rod 8 is fixedly installed in the installation holes; next, the inner lead plate 2 and the outer lead plate 4 are aligned and attached to the polyethylene plate 3, and then the clamping strip 5 is inserted into the through holes made in the inner lead plate 2, the polyethylene plate 3, and the outer lead plate 4. Then, the clamping plate 6 is put on the end of the clamping strip 5 and tightened with the first nut 7 to fix the clamping plate 6 on the clamping strip 5. Through the cooperation of the clamping strip 5 and the clamping plate 6, the assembly of the inner lead plate 2, the polyethylene plate 3, and the outer lead plate 4 is completed to form a protective component; then, the inner lead strip 9 and the polyethylene strip 11 are installed on the installation rod 8 in sequence, and then the multiple assembled protective components are arranged neatly in order. Then, the outer lead strip 12 is installed on the installation rod 8, and finally the second nut 13 is tightened on the end of the installation rod 8 to complete the fixation of the outer lead strip 12. Figure 1 As shown, after installation, the outer lead strip 12 will lock the upper and lower protective components, making all the protective components form a whole. The polyethylene plate 3 is arranged in an interlaced manner during assembly, which will cause the inner lead plate 2 and the outer lead plate 4 to be misaligned, thereby covering the splicing gaps, effectively preventing radiation leakage along the splicing points, and ensuring the radiation protection effect.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-layer composite radiation shielding wall, characterized in that, include: Concrete wall (1) is used as the base structure of the multi-layer composite radiation shielding wall; Protective components, a plurality of said protective components covering the inner side of said concrete wall (1), including: A polyethylene sheet (3) comprising an inner side facing the concrete wall (1) and an outer side facing away from the concrete wall (1); An inner lead plate (2) is disposed between the inner side of the polyethylene plate (3) and the concrete wall (1); An outer lead plate (4) is disposed on the outer side of the polyethylene plate (3).

2. The multi-layer composite radiation shielding wall according to claim 1, characterized in that, The side edge of the polyethylene plate (3) is provided with a mating surface that complements the shape of the side edge of the adjacent polyethylene plate (3); When the polyethylene plates (3) of the multiple protective components are assembled, the inner lead plates (2) and the outer lead plates (4) on both sides of the polyethylene plates (3) are misaligned by the mating surfaces that complement each other in shape.

3. The multi-layer composite radiation shielding wall according to claim 2, characterized in that, The two mating surfaces of the opposite side edges of the polyethylene plate (3) are inclined surfaces with complementary angles; Alternatively, the two mating surfaces of the opposite side edges of the polyethylene sheet (3) are stepped surfaces with complementary shapes in both the thickness direction and the surface direction.

4. The multi-layer composite radiation shielding wall according to claim 1, characterized in that, The protective component also includes a retaining strip (5); The card strip (5) simultaneously engages with the inner lead plate (2), the polyethylene plate (3), and the outer lead plate (4) for positioning.

5. The multi-layer composite radiation shielding wall according to claim 4, characterized in that, The inner lead plate (2), the polyethylene plate (3) and the outer lead plate (4) are all provided with vertical mounting holes that penetrate the plate body; The clip (5) has three parallel extending long rods, which are respectively used to insert into the mounting holes of the inner lead plate (2), the polyethylene plate (3) and the outer lead plate (4) to form a limiting fit.

6. The multi-layer composite radiation shielding wall according to claim 5, characterized in that, The protective assembly also includes a retaining plate (6) and a first nut (7), the first nut (7) being rotatably disposed inside the retaining plate (6); When the long rod structure of the clip (5) passes through the mounting hole, the clip plate (6) is mounted to the end of the long rod structure by the first nut (7).

7. The multi-layer composite radiation shielding wall according to any one of claims 1 to 6, characterized in that, The concrete wall (1) is detachably equipped with fixing components; The fixing component, in the installed state, is used to limit and engage at least a portion of the protective component to provide a holding force that keeps the protective component on the surface of the concrete wall (1).

8. The multi-layer composite radiation shielding wall according to claim 7, characterized in that, Multiple mounting rods (8) perpendicular to the surface of the concrete wall (1) are fixedly installed on the concrete wall (1). The fixing component is detachably mounted on the mounting rod (8).

9. The multi-layer composite radiation shielding wall according to claim 8, characterized in that, The fixing component includes: A polyethylene strip (11) comprising an inner side facing the concrete wall (1) and an outer side facing away from the concrete wall (1); An inner lead strip (9) is disposed between the inner side of the polyethylene strip (11) and the concrete wall (1); An outer lead strip (12) is disposed on the outer side of the polyethylene strip (11); The polyethylene strip (11), the inner lead strip (9), and the outer lead strip (12) are provided with mounting holes adapted to the mounting rod (8).

10. The multi-layer composite radiation shielding wall according to claim 9, characterized in that, The mounting rod (8) is provided with a threaded structure; The fixing assembly also includes a second nut (13) for threading onto the outer side of the outer lead bar (12) at the end of the mounting rod (8).

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