A high-density polyethylene shielding cabin and installation method

Abstract

The present invention discloses a high-density polyethylene shielding cabin and an installation method, which relates to the technical field of shielding cabins, including a high-density polyethylene shielding cabin body and an actively adjustable shielding sandwich assembly, wherein the high-density polyethylene shielding cabin body includes six stacked layer plate assemblies and a plurality of layer plate joint shielding assemblies. The present invention first determines the production accuracy requirements of each high-density polyethylene board through basic theories such as heat transfer and finite element analysis. The use of a stacking method without through-seams can avoid the cross-sectional through-seam from reducing the shielding effect. The layer plate joint shielding assembly is installed at the joint of two adjacent stacked layer plate assemblies, which greatly enhances the shielding effect at the joint and greatly strengthens the strength of the high-density polyethylene shielding cabin body; the use of an actively adjustable shielding sandwich assembly is used to deal with different strong interference sources that may appear in the later stage, and a replaceable liquid shielding layer is used to achieve active directional shielding of strong interference sources, which is easy to disassemble and has an outstanding shielding effect.

Description

Technical Field

[0001] The invention relates to the technical field of shielding cabins, and in particular to a high-density polyethylene shielding cabin and an installation method thereof. Background Art

[0002] A shielded cabin is a specially designed container or space, whose main function is to shield harmful factors such as radiation, electromagnetic interference, particle radiation, etc. in the external environment, and provide a relatively clean and safe experimental or working environment inside. Shielded cabins are widely used in scientific research, medical treatment, nuclear industry and other fields, especially in experimental environments that require strict control of radiation levels or electromagnetic interference.

[0003] High-density polyethylene (HDPE) shielding cabin is a type of shielding cabin that uses high-density polyethylene as the shielding material. The following are some of the characteristics of high-density polyethylene shielding cabin:

[0004] Material properties: High-density polyethylene is a non-metallic material with good radiation shielding properties. It also has the advantages of good chemical stability, corrosion resistance, and non-aging.

[0005] Shielding effect: HDPE can effectively shield gamma rays and neutron radiation and is suitable for a variety of radiation protection occasions.

[0006] Design and construction: When designing and constructing a high-density polyethylene shielding cabin, the size, shape and thickness of the cabin and the shielding material need to be considered to ensure that the expected shielding effect is achieved.

[0007] The world's largest high-density polyethylene shielding cabin located in Jinpingshan Tunnel in Liangshan Prefecture, Sichuan Province, China, was designed and built with 100 mm thick high-density polyethylene plates, with a total weight of more than 1,800 tons. The dimensions of this shielding cabin are 51.9 meters long, 9.78 meters wide, 7.9 meters high, and 1 meter thick, which can provide an extremely low radiation background environment for the physical experiments inside.

[0008] In the fields of cutting-edge physics research, medical research, nuclear facilities, etc., high-performance radiation shielding devices are often used to shield various types of radiation. Due to its material characteristics, high-density polyethylene will produce temperature deformation and creep, resulting in a large number of assembly and stacking construction joints. Excessive construction joints will cause the shielding cabin to fail to meet the shielding requirements and cannot meet the use function. Excessive construction joints will cause temperature stress between high-density polyethylene boards, bringing the risk of temperature stress damage to high-density polyethylene boards. At the same time, the temperature stress generated by the shielding cabin wall causes the supporting frame to be lateral force, affecting the safety of the cabin. Summary of the invention

[0009] In order to solve the technical problems of the above-mentioned high-density polyethylene shielding cabin, the present invention provides a high-density polyethylene shielding cabin and an installation method. The following technical solutions are adopted:

[0010] A high-density polyethylene shielding cabin comprises a high-density polyethylene shielding cabin body and an actively adjustable shielding sandwich assembly, wherein the high-density polyethylene shielding cabin body comprises six stacked layer plate assemblies and a plurality of layer plate joint shielding assemblies, wherein the six stacked layer plate assemblies are combined into a hollow hexahedron, and the plurality of layer plate joint shielding assemblies are respectively installed at the joints of two adjacent stacked layer plate assemblies, and the actively adjustable shielding sandwich assembly is detachably installed on the inner wall or the outer wall of the high-density polyethylene shielding cabin body, and a replaceable liquid shielding layer is used to actively and directionally shield strong interference sources.

[0011] Optionally, the stacked layer assembly is composed of a plurality of stacked high-density polyethylene sheets.

[0012] Optionally, there are no through seams during the stacking of the plurality of high-density polyethylene sheets.

[0013] By adopting the above technical solution, high-density polyethylene is used for construction. High-density polyethylene has a high hydrogen content. Hydrogen atoms have a good slowing effect on fast neutrons. High-density polyethylene with a large thickness is used to slow down neutrons and achieve a shielding effect. The solid shielding device built with high-density polyethylene has a huge volume and space capacity. It is generally assembled using a frame provided by a concrete structure or a steel structure. It can effectively shield gamma rays and neutron radiation and is suitable for a variety of radiation protection occasions. During the specific installation, the production accuracy requirements of each high-density polyethylene board can be determined through basic theories such as heat transfer and finite element analysis to ensure that each high-density polyethylene board can be assembled perfectly. At the same time, there will be gaps in the high-density polyethylene board during the stacking process. The stacking method without through-seam can avoid the cross-sectional through-seam that reduces the shielding effect. Installing a layer joint shielding component at the joint of two adjacent stacked layer board components can greatly enhance the shielding effect at the joint and greatly enhance the strength of the high-density polyethylene shielding cabin.

[0014] In the specific application process, there will be unpredictable strong interference sources, such as high-voltage equipment and high-power electrical equipment installed later. If these strong electromagnetic interference sources are not dealt with, they will still cause the electromagnetic interference inside the high-density polyethylene shielding cabin to exceed the standard. Here, an active adjustable shielding sandwich component is used to deal with different strong interference sources that may appear in the later stage. The replaceable liquid shielding layer can achieve active and directional shielding of strong interference sources. It is easy to disassemble and has outstanding shielding effect.

[0015] Optionally, the layer joint shielding assembly includes an I-shaped structural member, an adhesive and a pair of filling members, and the pair of filling members are respectively bonded and filled in a pair of grooves of the I-shaped structural member by the adhesive.

[0016] By adopting the above technical solution, there is a gap between the joints of the two stacked layer board assemblies and the structural parts, which affects the shielding effect and causes the high-density polyethylene boards to be loosely assembled and prone to sliding. Therefore, a layer board joint shielding assembly composed of an I-shaped structural member, an adhesive and a pair of filling members is used to fill the gap. While enhancing the shielding performance, it can also enhance the structural strength of the connection between the two stacked layer board assemblies.

[0017] Optionally, the filling piece is a high-density polyethylene board, and the adhesive is a mixture of high-density polyethylene powder of the same material as the high-density polyethylene board and polyurethane glue. The high-density polyethylene powder is greater than or equal to 50 meshes, is in a paste form, and can self-cure.

[0018] Optionally, the adhesive mix ratio is 10kg high-density polyethylene powder and 250ml polyurethane glue. The polyurethane glue adopts a two-component material and is selected at a ratio of 1:4 of component A: component B.

[0019] By adopting the above technical solution, the mixture of high-density polyethylene powder and polyurethane glue is in a paste-like state, which can effectively fill the gaps while ensuring the similarity of the materials, ensuring the shielding effect, and creating a radiation shielding experimental space.

[0020] Optionally, the actively adjustable shielding sandwich assembly includes multiple hooks, frame plates, injection valves, and discharge valves, the multiple hooks are respectively installed on one side of the frame plates, and multiple mounting parts are provided on the inner wall and outer wall of the high-density polyethylene shielding cabin. The actively adjustable shielding sandwich assembly is detachably mounted on the multiple mounting parts on the inner wall and outer wall of the high-density polyethylene shielding cabin through the multiple hooks, a sandwich space is provided inside the frame plate, and an injection port and a discharge port connected to the sandwich space are respectively provided on the top and bottom, the injection valve is installed at the injection port, and the discharge valve is installed at the discharge port, and the sandwich space is filled with a liquid radiation shielding layer.

[0021] Optionally, the liquid radiation shielding layer is formed by filling the interlayer space with a conductive solution.

[0022] By adopting the above technical solution, the thickness of the inner cavity of the sandwich space is 2-5mm, and the liquid radiation shielding layer composed of the conductive solution with a thickness of 2-5mm can achieve the shielding effect of interfering electrical signals, and the conductive solution can be easily replaced. The replacement of conductive solutions with different conductivity can adjust the anti-interference performance of the liquid radiation shielding layer. The conductive solution can be a sodium chloride solution, aluminum nitrate solution, etc. with different conductivity. Of course, the liquid radiation shielding layer can also be replaced by different conductive metal mesh layers in specific applications, such as metal copper mesh, metal silver mesh, etc. The position and shielding effect of the active adjustable shielding sandwich assembly can be flexibly adjusted, which greatly enhances the ability to cope with strong interference sources after the high-density polyethylene shielding cabin is installed, and avoids special interference sources from interfering with experimental instruments in the high-density polyethylene shielding cabin.

[0023] A method for installing a high-density polyethylene shielding cabin comprises the following steps:

[0024] Step 1: Install the high-density polyethylene shielding cabin, determine the specific deformation parameters through the basic theory of heat transfer and finite element analysis, and determine the production dimensional accuracy requirements to ensure that the installation gap meets the use requirements. Complete the stacking of six stacked layer board components and combine them into a hollow hexahedron;

[0025] Step 2, a pair of filling pieces are respectively made according to the size of a pair of grooves of the I-shaped structural member, and then a mixing ratio of 10kg high-density polyethylene powder to 250ml polyurethane glue is used. The polyurethane glue adopts a two-component material, and the adhesive is prepared in a ratio of 1:4 of component A: component B. The pair of filling pieces are respectively assembled in the pair of grooves of the I-shaped structural member through the adhesive to assemble the layer joints;

[0026] Step 3, installing a plurality of layer joint shielding components at the joints of two adjacent stacked layer components respectively, and bonding the joints with adhesive;

[0027] Step 4: Use steel structural members to connect multiple layer joint shielding components to form an inner frame.

[0028] Optionally, an active adjustable shielding sandwich assembly installation phase is also included, including the following steps:

[0029] Step a, detecting the interference source in the middle of the hollow hexahedron in the high-density polyethylene shielding cabin, measuring the electromagnetic intensity of the interference source, setting the electromagnetic intensity threshold of the interference source, and if there is an interference source exceeding the electromagnetic intensity threshold, locating the direction of the interference source and measuring the frequency;

[0030] Step b, configuring a conductive solution for the first time according to the frequency of the interference source, and adding the conductive solution into the frame plate interlayer space of the shielding component of the adjustable shielding interlayer component;

[0031] Step c, according to the direction of the interference source, the adjustable shielding sandwich assembly filled with the conductive solution is mounted on the inner wall or outer wall of the high-density polyethylene shielding cabin at a corresponding direction through a plurality of hooks;

[0032] Step d, measure the electromagnetic strength of the interference source again. If the electromagnetic strength of the interference source is lower than half of the electromagnetic strength threshold of the interference source, the installation of the active adjustable shielding sandwich assembly is completed; otherwise, repeat steps b and c until the electromagnetic strength of the interference source is measured again and is lower than half of the electromagnetic strength threshold of the interference source.

[0033] In summary, the present invention includes at least one of the following beneficial technical effects:

[0034] The present invention can provide a high-density polyethylene shielding cabin and installation method. First, the production accuracy requirements of each high-density polyethylene board are determined through basic theories such as heat transfer and finite element analysis to ensure that each high-density polyethylene board can be assembled perfectly. The stacking method without through-seam can avoid the cross-sectional seams that reduce the shielding effect. The layer seam shielding assembly is installed at the seam of two adjacent stacked layer plate assemblies to greatly enhance the shielding effect at the seam and greatly enhance the strength of the high-density polyethylene shielding cabin. The active adjustable shielding sandwich assembly is used to deal with different strong interference sources that may appear in the later stage. The replaceable liquid shielding layer can achieve active directional shielding of strong interference sources, which is easy to disassemble and has outstanding shielding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the internal structure of a high-density polyethylene shielding cabin of the present invention;

[0036] Figure 2 It is a schematic diagram of the cross-sectional structure of a layer joint shielding component of a high-density polyethylene shielding cabin of the present invention;

[0037] Figure 3 It is a schematic diagram of the side structure of a stacked layer plate assembly of a high-density polyethylene shielding cabin of the present invention;

[0038] Figure 4 It is a schematic structural diagram of a state in which an actively adjustable shielding sandwich component is mounted on the side of a stacked layer plate component of a high-density polyethylene shielding cabin of the present invention;

[0039] Figure 5 The present invention is a schematic diagram of the structure of an actively adjustable shielding sandwich component of a high-density polyethylene shielding cabin.

[0040] Description of the drawings: 1. Stacked layer board assembly; 2. Layer board joint shielding assembly; 21. I-shaped structural member; 22. Adhesive; 23. Filling member; 3. Active adjustable shielding interlayer assembly; 31. Hook; 32. Frame board; 321. Interlayer space; 33. Liquid injection valve; 34. Liquid discharge valve. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0042] The embodiment of the invention discloses a high-density polyethylene shielding cabin and an installation method.

[0043] Reference Figure 1-Figure 5 Embodiment 1, a high-density polyethylene shielding cabin, including a high-density polyethylene shielding cabin body and an actively adjustable shielding sandwich assembly 3, the high-density polyethylene shielding cabin body includes six stacked layer plate assemblies 1 and a plurality of layer plate joint shielding assemblies 2, the six stacked layer plate assemblies 1 are combined into a hollow hexahedron, the plurality of layer plate joint shielding assemblies 2 are respectively installed at the joints of two adjacent stacked layer plate assemblies 1, the actively adjustable shielding sandwich assembly 3 is detachably installed on the inner wall or outer wall of the high-density polyethylene shielding cabin body, and a replaceable liquid shielding layer is used to actively and directionally shield strong interference sources.

[0044] Embodiment 2, the stacked layer plate assembly 1 is composed of a plurality of stacked high-density polyethylene plates.

[0045] Example 3: There are no through seams during the stacking of multiple high-density polyethylene plates.

[0046] It is constructed with high-density polyethylene, which has a high hydrogen content. Hydrogen atoms have a good slowing effect on fast neutrons. Thick high-density polyethylene is used to slow down neutrons and achieve a shielding effect. The solid shielding device built with high-density polyethylene has a huge volume and space capacity. It is generally assembled using a frame provided by a concrete structure or a steel structure. It can effectively shield gamma rays and neutron radiation and is suitable for a variety of radiation protection occasions. During the specific installation, the production accuracy requirements of each high-density polyethylene board can be determined through basic theories such as heat transfer and finite element analysis to ensure that each high-density polyethylene board can be assembled perfectly. At the same time, there will be gaps in the high-density polyethylene boards during the stacking process. The stacking method without through-seam can avoid the cross-sectional through-seam that reduces the shielding effect. Installing the layer seam shielding component 2 at the joint of two adjacent stacked layer plate components 1 can greatly enhance the shielding effect at the joint, and can also greatly enhance the strength of the high-density polyethylene shielding cabin;

[0047] In the specific application process, there will be unpredictable strong interference sources, such as high-voltage equipment and high-power electrical equipment installed later. If these strong electromagnetic interference sources are not dealt with, they will still cause the electromagnetic interference inside the high-density polyethylene shielding cabin to exceed the standard. Here, an active adjustable shielding interlayer assembly 3 is used to deal with different strong interference sources that may appear in the later stage. A replaceable liquid shielding layer is used to achieve active and directional shielding of strong interference sources. It is easy to disassemble and has outstanding shielding effect.

[0048] In the fourth embodiment, the layer joint shielding assembly 2 comprises an I-shaped structural member 21 , an adhesive 22 and a pair of filling members 23 . The pair of filling members 23 are respectively bonded and filled in a pair of grooves of the I-shaped structural member 21 by the adhesive 22 .

[0049] There is a gap between the joints of the two stacked layer board assemblies 1 and the structural parts, which affects the shielding effect and causes the high-density polyethylene boards to be loosely assembled and prone to sliding. Therefore, a layer board joint shielding assembly 2 composed of an I-shaped structural member 21, an adhesive 22 and a pair of filling members 23 is used to fill the gap. While enhancing the shielding performance, it can also enhance the structural strength of the connection between the two stacked layer board assemblies 1.

[0050] In Example 5, the filler 23 is a high-density polyethylene board, and the adhesive 22 is made of a mixture of high-density polyethylene powder of the same material as the high-density polyethylene board and polyurethane glue. The high-density polyethylene powder is greater than or equal to 50 meshes, is in a paste state, and can self-cure.

[0051] In Example 6, the mixing ratio of the adhesive 22 is 10 kg high-density polyethylene powder and 250 ml polyurethane glue. The polyurethane glue is a two-component material, and is selected in a ratio of 1:4 of component A: component B.

[0052] The mixture of high-density polyethylene powder and polyurethane glue is in paste form, which can effectively fill the gaps while ensuring the similarity of the materials, ensuring the shielding effect and creating a radiation shielding experimental space.

[0053] Embodiment 7, the active adjustable shielding interlayer assembly 3 comprises a plurality of hooks 31, a frame plate 32, a liquid injection valve 33, and a liquid discharge valve 34, the plurality of hooks 31 are respectively installed on one side of the frame plate 32, a plurality of mounting parts are provided on the inner wall and the outer wall of the high-density polyethylene shielding cabin, the active adjustable shielding interlayer assembly 3 is detachably mounted on the plurality of mounting parts on the inner wall and the outer wall of the high-density polyethylene shielding cabin through the plurality of hooks 31, an interlayer space 321 is provided inside the frame plate 32, an injection port and a liquid discharge port connected to the interlayer space 321 are respectively provided on the top and the bottom, the injection valve 33 is installed at the injection port, the liquid discharge valve 34 is installed at the liquid discharge port, and the interlayer space 321 is filled with a liquid radiation shielding layer.

[0054] In Example 8, the liquid radiation shielding layer is formed by filling the interlayer space 321 with a conductive solution.

[0055] The thickness of the inner cavity of the sandwich space 321 is 2-5mm. The liquid radiation shielding layer composed of a conductive solution with a thickness of 2-5mm can achieve the shielding effect on the interfering electrical signal, and the conductive solution can be easily replaced. The replacement of conductive solutions with different conductivity can adjust the anti-interference performance of the liquid radiation shielding layer. The conductive solution can be a sodium chloride solution, aluminum nitrate solution, etc. with different conductivity. Of course, the liquid radiation shielding layer can also be replaced by different conductive metal mesh layers in specific applications, such as metal copper mesh, metal silver mesh, etc. The position and shielding effect of the active adjustable shielding sandwich assembly 3 can be flexibly adjusted, which greatly enhances the ability to cope with strong interference sources after the high-density polyethylene shielding cabin is installed, and avoids special interference sources from interfering with the experimental instruments in the high-density polyethylene shielding cabin.

[0056] Embodiment 9, a method for installing a high-density polyethylene shielding cabin, comprising the following steps:

[0057] Step 1, install the high-density polyethylene shielding cabin, determine the specific deformation parameters through the basic theory of heat transfer and finite element analysis, and determine the production size accuracy requirements to ensure that the installation gap meets the use requirements, and complete the stacking of six stacked layer board assemblies 1 respectively, and combine them into a hollow hexahedron;

[0058] The structural analysis and size determination of the specific high-density polyethylene shielding cabin can be carried out using the following steps:

[0059] (1) Based on the basic theories of steady-state thermal analysis, the heat conduction equilibrium equation of steady-state thermal analysis is derived and solved, and the single-valued condition of the heat conduction differential equation and the calculation method of thermal stress are analyzed.

[0060] (2) Based on the basic principles of heat transfer and the working conditions of the polyethylene shielding cabin, a steady-state heat transfer analysis model for the shielding cabin is proposed.

[0061] (3) Based on the actual installation situation of the shielding cabin, the interaction relationship and influence between the polyethylene panels of the shielding cabin are analyzed, and a suitable finite element analysis model is proposed.

[0062] (4) Based on the basic theory of the finite element method, reasonable assumptions are made about the temperature field of the polyethylene shielding cabin, a finite element model is established, and a steady-state temperature field analysis is performed to obtain the steady-state temperature field distribution of the corresponding model.

[0063] (5) Based on the thermal analysis, the thermal analysis result file was loaded into the thermal stress analysis by converting the unit type and load step type. The thermal deformation of the polyethylene shielding compartment under the uneven temperature field distribution was obtained, providing quantitative data support for gap control during the construction and use stages.

[0064] (6) Based on the research and analysis results, the interaction relationship between high-density polyethylene sheets under temperature and their impact on the overall deformation of the shielding cabin are clarified, and suggestions for gap control during the construction and use of the polyethylene shielding cabin are put forward.

[0065] (7) According to the stress level of the polyethylene single board in use, referring to the creep model parameters of similar materials, the creep deformation of the high-density polyethylene board under the working stress level is analyzed to provide a reference for understanding the creep behavior of the polyethylene shielding compartment during use.

[0066] Step 2, a pair of filling pieces 23 are respectively made according to the size of a pair of grooves of the I-shaped structural member 21, and then a pair of filling pieces 23 are respectively assembled in a pair of grooves of the I-shaped structural member 21 by using the adhesive 22, wherein the pair of filling pieces 23 are respectively assembled in a pair of grooves of the I-shaped structural member 21 to assemble the layer joints;

[0067] Step 3, installing a plurality of layer joint shielding components 2 at the joints of two adjacent stacked layer components 1, and bonding the joints with adhesive 22;

[0068] Step 4: Use steel structural members to connect multiple layer joint shielding components 2 to form an inner frame.

[0069] Embodiment 10 further includes an installation phase of the active adjustable shielding sandwich assembly 3, including the following steps:

[0070] Step a, detecting the interference source in the middle of the hollow hexahedron in the high-density polyethylene shielding cabin, measuring the electromagnetic intensity of the interference source, setting the electromagnetic intensity threshold of the interference source, and if there is an interference source exceeding the electromagnetic intensity threshold, locating the direction of the interference source and measuring the frequency;

[0071] Step b, configuring a conductive solution for the first time according to the frequency of the interference source, and adding the conductive solution into the interlayer space 321 of the frame plate 32 of the shielding component 2 of the adjustable shielding interlayer component 3;

[0072] Step c, according to the direction of the interference source, the adjustable shielding sandwich assembly 3 filled with the conductive solution is mounted on the inner wall or outer wall of the high-density polyethylene shielding cabin at a corresponding direction through a plurality of hooks 31;

[0073] Step d, measure the electromagnetic strength of the interference source again. If the electromagnetic strength of the interference source is lower than half of the electromagnetic strength threshold of the interference source, the installation of the active adjustable shielding sandwich assembly 3 is completed; otherwise, repeat steps b and c until the electromagnetic strength of the interference source is measured again and is lower than half of the electromagnetic strength threshold of the interference source.

[0074] The following equipment can be used to measure the strength and direction of electromagnetic interference (EMI) sources: electromagnetic field strength meter (or spectrum analyzer), directional antenna, preamplifier, frequency meter, recording equipment, etc.

[0075] Measure the background noise first: Measure the background noise without interference sources so that this part of the noise can be excluded from the total interference later.

[0076] Place the antenna at the predetermined test location, turn on the electromagnetic field strength meter, adjust it to the appropriate frequency range, record the electromagnetic field strength at that point, and use a directional antenna to slowly change the direction of the antenna. Observe the changes in the readings of the electromagnetic field strength meter to find the direction with the largest field strength, which is the direction of the interference source. Start from a position far away from the interference source and gradually approach the interference source. Measure the field strength at different locations at the same time. By comparing the field strength data at different locations, you can more accurately determine the location of the interference source. Analyze and process the measured data, and draw a graph showing the change in interference strength with direction to help intuitively determine the direction and strength of the interference source.

[0077] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-density polyethylene shielding cabin, characterized in that: The invention comprises a high-density polyethylene shielding cabin and an actively adjustable shielding sandwich component (3), wherein the high-density polyethylene shielding cabin comprises six stacked layer board components (1) and a plurality of layer board joint shielding components (2), the six stacked layer board components (1) are combined into a hollow hexahedron, the plurality of layer board joint shielding components (2) are respectively installed at the joints of two adjacent stacked layer board components (1), and the actively adjustable shielding sandwich component (3) is detachably installed on the inner wall or the outer wall of the high-density polyethylene shielding cabin, and a replaceable liquid shielding layer is used to actively and directionally shield a strong interference source; The layer joint shielding assembly (2) comprises an I-shaped structural member (21), an adhesive (22), and a pair of filling members (23); the pair of filling members (23) are respectively bonded and filled in a pair of grooves of the I-shaped structural member (21) by the adhesive (22); The filling member (23) is a high-density polyethylene plate, and the adhesive (22) is a mixture of high-density polyethylene powder and polyurethane glue of the same material as the high-density polyethylene plate, and the high-density polyethylene powder is greater than or equal to 50 meshes; The adhesive (22) is mixed in a ratio of 10 kg high-density polyethylene powder to 250 ml polyurethane glue. The polyurethane glue is a two-component material, selected in a ratio of 1:4 of component A to component B.

2. A high-density polyethylene shielding cabin according to claim 1, characterized in that: The stacked layer plate assembly (1) is composed of a plurality of stacked high-density polyethylene plates.

3. A high-density polyethylene shielding cabin according to claim 2, characterized in that: There are no through seams when multiple high-density polyethylene sheets are stacked.

4. A high-density polyethylene shielding cabin according to claim 3, characterized in that: The active adjustable shielding sandwich component (3) comprises a plurality of hooks (31), a frame plate (32), a liquid injection valve (33), and a liquid discharge valve (34). The plurality of hooks (31) are respectively mounted on one side of the frame plate (32). The inner wall and the outer wall of the high-density polyethylene shielding cabin are provided with a plurality of mounting parts. The active adjustable shielding sandwich component (3) is detachably mounted on the plurality of mounting parts on the inner wall and the outer wall of the high-density polyethylene shielding cabin through the plurality of hooks (31). An interlayer space (321) is provided inside the frame plate (32). A liquid injection port and a liquid discharge port communicating with the interlayer space (321) are respectively provided at the top and the bottom. The liquid injection valve (33) is mounted at the liquid injection port, and the liquid discharge valve (34) is mounted at the liquid discharge port. The interlayer space (321) is filled with a liquid radiation shielding layer.

5. A high-density polyethylene shielding cabin according to claim 4, characterized in that: The liquid radiation shielding layer is formed by filling the interlayer space (321) with a conductive solution.

6. A method for installing a high-density polyethylene shielding cabin, characterized in that: The following steps are involved: Step 1, installing a high-density polyethylene shielding cabin, determining specific deformation parameters through heat transfer and finite element analysis theory, thereby determining production dimensional accuracy requirements, ensuring that the installation gap meets the use requirements, and completing the stacking of six stacked layer board assemblies (1) and combining them into a hollow hexahedron; Step 2, a pair of filling pieces (23) are respectively manufactured according to the size of a pair of grooves of the I-shaped structural member (21), and then a mixture ratio of 10 kg high-density polyethylene powder to 250 ml polyurethane glue is used, wherein the polyurethane glue adopts a two-component material and an adhesive (22) is prepared in a ratio of component A to component B of 1:4, and the pair of filling pieces (23) are respectively assembled in the pair of grooves of the I-shaped structural member (21) by the adhesive (22) to form a joint of the combined laminates; Step 3: installing a plurality of layer joint shielding components (2) at the joints of two adjacent stacked layer components (1) respectively, and bonding the joints with an adhesive (22).

7. The method for installing a high-density polyethylene shielding cabin according to claim 6, characterized in that: Also included is an active adjustable shielding sandwich assembly (3) installation phase, including the following steps: Step a, detecting the interference source in the middle of the hollow hexahedron in the high-density polyethylene shielding cabin, measuring the electromagnetic intensity of the interference source, setting the electromagnetic intensity threshold of the interference source, and if there is an interference source exceeding the electromagnetic intensity threshold, locating the direction of the interference source and measuring the frequency; Step b, configuring a conductive solution for the first time according to the frequency of the interference source, and adding the conductive solution into the interlayer space (321) of the frame plate (32) of the shielding component (2) of the adjustable shielding interlayer component (3); Step c, according to the direction of the interference source, the adjustable shielding sandwich component (3) filled with the conductive solution is mounted on the inner wall or outer wall of the high-density polyethylene shielding cabin at a corresponding direction through a plurality of hooks (31); Step d, measuring the electromagnetic strength of the interference source again, if the electromagnetic strength of the interference source is lower than half of the electromagnetic strength threshold of the interference source, the installation of the active adjustable shielding sandwich assembly (3) is completed; otherwise, repeating steps b and c until the electromagnetic strength of the interference source is measured again and is lower than half of the electromagnetic strength threshold of the interference source.

Images