Lightweight anti-radiation door body based on nano composite material

Abstract

The invention provides a light-weight anti-radiation door body based on a nano composite material, and belongs to the technical field of anti-radiation doors. A door frame; the door body is movably hinged to the door frame; wherein the door frame comprises a solid door and a cavity body; a multi-layer composite filling structure of epoxy resin, nano tungsten carbide, sound insulation cotton, nano boron nitride and high-density polyethylene is adopted, the scattering design of the corrugated alloy barrier plate is combined, efficient synergistic shielding and an excellent sound insulation effect on various rays are achieved, a traditional pure lead material is partially or completely replaced with a high-performance nano composite material, and the anti-radiation performance of the composite material is improved. The self-weight of the door body is reduced on the premise that the shielding effectiveness is ensured or even improved, meanwhile, the door frame is of an integrally-formed solid and cavity composite structure, excellent overall rigidity and structural stability are provided while light weight is ensured, loads on a building and an opening and closing mechanism are reduced, and installation and application are convenient.

Description

Technical Field

[0001] This invention belongs to the field of radiation protection door technology, specifically relating to a lightweight radiation protection door based on nanocomposite materials. Background Technology

[0002] Radiation protection is a crucial component in fields such as nuclear technology applications, medical radiology, industrial non-destructive testing, and high-energy physics experiments. As a key movable component in the radiation shielding system, the performance of protective doors directly affects personnel safety and the effectiveness of area control.

[0003] To achieve effective radiation attenuation, extremely thick and heavy materials are often required, resulting in exceptionally heavy doors. This places high demands on building structures and hinge systems, making installation difficult and costly. It also makes opening and closing the doors extremely strenuous, hindering automation and potentially impacting rapid passage or sealing in emergencies. Traditional lead or concrete doors are primarily designed for gamma / X-ray shielding, offering weak protection against neutron radiation. They often require additional neutron-absorbing layers such as boron-containing polyethylene, further increasing structural complexity and weight. Furthermore, their sound insulation and airtightness are typically poor, failing to meet multi-functional protection needs. Most traditional protective doors lack intelligent integration with radiation monitoring systems, relying on mechanical locks that require manual operation. This prevents rapid, automatic emergency locking in case of radiation leaks or excessive harmful gases, posing risks of delayed safety response and human error. Traditional doors are often fixed structures; once the internal shielding layer ages, is damaged, or needs upgrading according to protection standards, the entire door often needs replacement or large-scale dismantling and repair, which is time-consuming and labor-intensive, and leaves safety gaps in the protected area during maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight radiation shielding door based on nanocomposite materials. This addresses the shortcomings of existing lead or concrete doors, which primarily shield against gamma / X-rays but offer weak protection against neutron radiation. These doors often require additional neutron-absorbing layers such as boron-containing polyethylene, further increasing structural complexity and weight. Furthermore, their additional properties, such as sound insulation and airtightness, are typically poor, making it difficult to meet multifunctional protection requirements. Most traditional protective doors also lack intelligent integration with radiation monitoring systems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A lightweight radiation shielding door based on nanocomposite materials, comprising: Door frame; The door body is hinged to the door frame. The door frame includes a solid door and a cavity. Epoxy resin, nano-tungsten carbide, sound insulation cotton, nano-boron nitride composite material, and high-density polyethylene are arranged sequentially from top to bottom within the cavity. Multiple corrugated barrier panels are respectively disposed between epoxy resin, nano-tungsten carbide, sound insulation cotton, nano-boron nitride composite material and high-density polyethylene. A locking mechanism, located inside the solid door, automatically locks the door when the device senses radiation, protecting personnel safety. The mounting assembly is located within the cavity, facilitating the replacement of epoxy resin, nano-tungsten carbide, sound insulation cotton, nano-boron nitride composite material, high-density polyethylene, and corrugated barrier panels.

[0006] In a preferred embodiment of the present invention, the locking mechanism includes an insertion hole, a mounting plate, a gas detector alarm, a mounting groove, a plug rod, a fixing plate, a connecting rod, a tension plate, a limiting plate, and an electric push rod. Four connecting rods are provided. The mounting groove is located on one side of the solid door. The electric push rod is fixedly connected to the inner wall of one side of the mounting groove. The plug rod is slidably connected within the mounting groove. The limiting plate is fitted onto the circumferential surface of the plug rod. The fixing plate is fixedly connected to the circumferential surface of the plug rod. The tension plate is located between the fixing plate and the limiting plate. The extended end of the electric push rod passes through the limiting plate and is fixed to the tension plate. Two of the connecting rods are connected to the fixing plate via hinges, and the other two connecting rods are connected to the limiting plate via hinges. The adjacent ends of the four connecting rods are connected to the tension plate via hinges. The insertion hole begins on the inner wall of the door frame. The mounting plate is fixedly connected to one side of the door body. The gas detector alarm is installed within the mounting plate.

[0007] In a preferred embodiment of the present invention, the mounting assembly includes a baffle, a mounting ring, and a bolt. The baffle is located within the cavity, the mounting ring is fixedly connected to one side of the baffle, and the bolt is threaded into the mounting ring.

[0008] As a preferred embodiment of the present invention, a mounting frame is fixedly connected to the other side of the door, and a fan is installed inside the mounting frame.

[0009] As a preferred embodiment of the present invention, two notice boards are fixedly connected to the other side of the door.

[0010] As a preferred embodiment of the present invention, the solid door and the cavity are integrally formed.

[0011] In a preferred embodiment of the present invention, the electric push rod is electrically connected to a controller, which is signal-connected to the gas detector alarm. When the gas detector alarm detects excessive radiation or harmful gas concentration and issues an alarm signal, the controller drives the extension end of the electric push rod to retract.

[0012] As a preferred embodiment of the present invention, the inner wall of the cavity is coated with a metal shielding coating, and the corrugated barrier plate is made of a lead-based alloy.

[0013] As a preferred embodiment of the present invention, a sealing strip is embedded in the edge of the baffle.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The door employs a multi-layer composite filling structure consisting of epoxy resin, nano-tungsten carbide, sound insulation cotton, nano-boron nitride, and high-density polyethylene, combined with a corrugated alloy barrier plate for scattering design. This achieves highly efficient and synergistic shielding against various types of radiation and excellent sound insulation. By partially or completely replacing traditional pure lead materials with high-performance nanocomposite materials, the door's weight is reduced while ensuring or even improving shielding effectiveness. Furthermore, the door frame utilizes an integrated solid and cavity composite structure, providing excellent overall rigidity and structural stability while maintaining lightweight design. This reduces the load on the building and opening / closing mechanism, facilitating installation and application.

[0015] 2. When the sensor detects excessive radiation or a leak of harmful gas, the system can automatically trigger the electric push rod within seconds, and forcibly lock the door through a precise linkage mechanism. This upgrades the safety protection from traditional passive isolation to active intervention and emergency isolation, effectively preventing personnel from accidentally entering in dangerous situations or the escalation of accidents, and improving the reliability and response speed of personnel safety protection.

[0016] 3. This design allows for easy inspection, replacement, or upgrade of all internal protective filling layers and corrugated barrier panels by removing a single-side baffle without damaging the main structure of the door. This not only simplifies the maintenance process but also reduces maintenance costs and downtime. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a first-view perspective perspective view of the present invention; Figure 2 This is a second-view perspective perspective view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 For the present invention Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is the first sectional view in this invention; Figure 6 For the present invention Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is the second sectional view in the present invention; Figure 8 For the present invention Figure 7 A magnified view of a section at point C.

[0018] In the diagram: 1. Door frame; 101. Solid door; 102. Cavity; 2. Door body; 3. Mounting frame; 4. Fan; 5. Notice board; 6. Socket; 7. Mounting plate; 8. Gas detector alarm; 9. Baffle; 10. Mounting ring; 11. Bolt; 1201. Epoxy resin; 1202. Nano-tungsten carbide; 1203. Sound insulation cotton; 1204. Nano-boron nitride composite material; 1205. High-density polyethylene; 13. Corrugated barrier plate; 14. Mounting groove; 15. Insert rod; 16. Fixing plate; 17. Connecting rod; 18. Tension plate; 19. Limiting plate; 20. Electric push rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1

[0021] Please see Figures 1-8 The present invention provides the following technical solutions: A lightweight radiation shielding door based on nanocomposite materials, comprising: Door frame 1; Door body 2 is hinged to door frame 1; The door frame 1 includes a solid door 101 and a cavity 102; Epoxy resin 1201, nano tungsten carbide 1202, sound insulation cotton 1203, nano boron nitride composite material 1204, and high-density polyethylene 1205 are arranged sequentially from top to bottom within the cavity 102. Multiple corrugated barrier plates 13 are respectively disposed between epoxy resin 1201, nano tungsten carbide 1202, sound insulation cotton 1203, nano boron nitride composite material 1204 and high-density polyethylene 1205. The locking mechanism is located inside the solid door 101. When the equipment senses radiation, it automatically locks the door 2 to protect personnel safety. The mounting components are located inside the cavity 102, facilitating the replacement of epoxy resin 1201, nano tungsten carbide 1202, sound insulation cotton 1203, nano boron nitride composite material 1204, high-density polyethylene 1205, and corrugated barrier plate 13.

[0022] In a specific embodiment of the present invention, the radiation-proof door mainly consists of a door frame 1 and a door body 2. The door body 2 is movably connected to one side of the door frame 1 via a hinge to achieve normal opening and closing functions. The solid door 101 and a cavity 102 for accommodating the core protective material are preferably integrally extruded from high-strength aluminum alloy to ensure structural strength and overall sealing. The core of the radiation-proof function lies in the multi-layer composite filling structure inside the cavity 102, consisting of an epoxy resin layer 1201, a nano-tungsten carbide composite material layer 1202, a sound insulation cotton layer 1203, a nano-boron nitride composite material layer 1204, and a high-density polyethylene layer 1205. Through scientific combination, multi-functional integrated protection is achieved. Epoxy resin 1201, as the outermost layer, provides good... The structure provides adhesion, corrosion resistance, and initial radiation scattering. Nano-tungsten carbide 1202: As a high-density nanocomposite material, it effectively attenuates and absorbs medium- and high-energy X-rays and gamma rays, serving as the main radiation shielding layer. Sound insulation cotton 1203: Located in the middle layer, it primarily absorbs sound and reduces noise, improving the working environment. It also acts as a buffer layer between different functional materials. Nano-boron nitride composite material 1204: It possesses excellent neutron radiation shielding capability and thermal stability, and enhances the overall mechanical properties of the material. High-density polyethylene 1205: As the innermost layer, it has good impact resistance and chemical stability, while also providing good slowing and shielding effects against fast neutrons, enhancing protective effectiveness and preventing direct radiation penetration. Corrugated structures are provided between all the above functional layers. The shielding plate 13 extends the propagation path of rays within the material, thereby significantly improving the overall shielding efficiency. To ensure personnel safety in abnormal situations, the door integrates an automatic locking mechanism, mainly installed on the side of the solid door 101. This includes an electric push rod 20 fixed in the mounting groove 14. The telescopic end of the electric push rod is connected to a tension plate 18. The tension plate 18 is hinged to a limiting plate 19 fitted on a plug rod 15 and a fixing plate 16 fixed on the plug rod 15 via four connecting rods 17, forming a stable push-and-lock mechanism. This mechanism utilizes a multi-layer composite structure of epoxy resin 1201, nano-tungsten carbide 1202, sound insulation cotton 1203, nano-boron nitride composite material 1204, and high-density polyethylene 1205, combined with wave... The scattering design of the corrugated alloy barrier plate achieves efficient shielding against various types of radiation, including X-rays, gamma rays, and neutron flux. It also possesses excellent sound insulation, corrosion resistance, and physical protection properties. When maintenance or replacement of the epoxy resin 1201, nano-tungsten carbide 1202, sound insulation cotton 1203, nano-boron nitride composite material 1204, high-density polyethylene 1205, or corrugated barrier plate 13 within the cavity 102 is required, operators can easily disassemble and install these components using the mounting components located within the cavity 102, without disassembling the entire door body 2. This reduces maintenance difficulty and cost, replacing traditional pure lead plates or heavy concrete. While maintaining or even improving protective performance, it reduces the weight of the door body, lowering the load on the building structure and opening / closing mechanism.Easy to install and use, the integrated automatic locking mechanism monitors the environment in real time through sensors and can instantly trigger a mechanical lock in the event of a hazard, achieving a leap from passive protection to active intervention and improving the reliability of personnel safety. The modular installation component design makes replacing core protective materials quick and easy, without damaging the main door structure. This extends the overall service life of the door, adapts to the maintenance needs of technological upgrades and material aging, and reduces the total life-cycle cost. The integrated door frame design balances strength and functionality, supplemented by ventilation and warning signs, making this radiation-proof door not only a protective device but also a comprehensive safety node integrating safety, environmental control, and information display.

[0023] Please refer to the details. Figures 7-8 The locking mechanism includes a socket 6, a mounting plate 7, a gas detector alarm 8, a mounting groove 14, a plug rod 15, a fixing plate 16, a connecting rod 17, a tension plate 18, a limiting plate 19, and an electric push rod 20. Four connecting rods 17 are provided. The mounting groove 14 is located on one side of the solid door 101. The electric push rod 20 is fixedly connected to the inner wall of one side of the mounting groove 14. The plug rod 15 is slidably connected within the mounting groove 14. The limiting plate 19 is fitted onto the circumferential surface of the plug rod 15. The fixing plate 16 is fixedly connected to the circumferential surface of the plug rod 15. On the periphery, the tension plate 18 is located between the fixed plate 16 and the limiting plate 19. The extended end of the electric push rod 20 passes through the limiting plate 19 and is fixed to the tension plate 18. Two connecting rods 17 are connected to the fixed plate 16 through hinges, and the other two connecting rods 17 are connected to the limiting plate 19 through hinges. The close ends of the four connecting rods 17 are connected to the tension plate 18 through hinges. The insertion hole 6 starts from the inner wall of the door frame 1. The mounting plate 7 is fixedly connected to one side of the door body 2. The gas detection alarm 8 is installed in the mounting plate 7.

[0024] In this embodiment: the gas detector alarm 8 is installed on one side inside the door. The gas detector alarm 8 can not only detect harmful gases, but also usually integrates radiation dose monitoring function. The mounting plate 7 is used as a carrier. The drive and transmission parts are all integrated on the side of the solid door 101 of the door frame 1. The mounting groove 14 is used to place the equipment. When the gas detector alarm 8 detects that the radiation exceeds the standard or the concentration of harmful gases reaches the danger threshold and issues an alarm, the extension end of the electric push rod 20 located in the mounting groove 14 starts to retract. When the extension end of the electric push rod 20 retracts, it pulls the tension plate 18. The movement of the tension plate 18 is connected by a hinge formed by four connecting rods 17. The lever mechanism transmits and converts motion: two connecting rods 17 hinged to the tension plate 18 and the fixed plate 16, and two other connecting rods 17 hinged to the tension plate 18 and the limiting plate 19, work together. When the connecting rods 17 move, they push the fixed plate 16 and the limiting plate 19 sleeved on the insert rod 15 away from each other. This movement forces the insert rod 15 to slide along the mounting groove 14 toward the door frame 1. When the insert rod 15 extends and is fully inserted into the insertion hole 6 opened in the inner wall of the door frame 1, the door body 2 and the door frame 1 are mechanically locked together and cannot be opened, thereby realizing automatic locking in emergency situations, effectively isolating dangerous areas and ensuring personnel safety.

[0025] Please refer to the details. Figures 3-4 The mounting components include a baffle 9, a mounting ring 10, and a bolt 11. The baffle 9 is located inside the cavity 102, the mounting ring 10 is fixedly connected to one side of the baffle 9, and the bolt 11 is threadedly connected to the mounting ring 10.

[0026] In this embodiment: when it is necessary to replace or maintain the epoxy resin 1201, nano tungsten carbide 1202, sound insulation cotton 1203, nano boron nitride composite material 1204, high-density polyethylene 1205 and the corrugated barrier plate 13 between each layer filling the cavity 102, the operator can unscrew the bolts 11 that fix the mounting ring 10 to the door frame 1 or the solid door 101. Then, the entire baffle 9, together with the subsequent multi-layer composite material and corrugated barrier plate 13, can be taken out from the opening of the cavity 102 or pushed in for maintenance through the mounting ring 10. The installation and disassembly process is convenient. In this device, there are two sets of baffle 9, mounting ring 10 and bolts 11. The baffle 9 is fixed to the solid door 101 by the bolts 11, so that the baffle 9 blocks the upper and lower openings of the cavity 102.

[0027] Please refer to the details. Figures 1-4 A mounting frame 3 is fixedly connected to the other side of the door 2, and a fan 4 is installed inside the mounting frame 3.

[0028] In this embodiment, the fan 4 is located outside the door and only provides heat dissipation to the outer surface of the solid door 101 and the cavity 102. The mounting frame 3 can also effectively prevent people's hands from contacting the door 2 and can also be used for the installation of the fan 4.

[0029] Please refer to the details. Figure 1 Two notice boards 5 are fixedly connected to the other side of the door 2.

[0030] In this embodiment, the two notice boards 5 can provide clear safety warnings or operation instructions, playing an important role in safety reminders and regulating behavior.

[0031] Please refer to the details. Figure 1 The solid door 101 and the cavity 102 are designed as a single piece.

[0032] In this embodiment, when the door 2 is subjected to external pressure, radiation impact or stress from frequent opening and closing, the solid door 101 and the cavity 102 adopt an integral molding design, which makes its overall structure stronger and there are no weak links at the connection, thereby significantly improving the overall mechanical strength, structural stability and long-term reliability of the door frame 1.

[0033] Please refer to the details. Figures 1-8 The electric push rod 20 is electrically connected to a controller, which is connected to the gas detector alarm 8. When the gas detector alarm 8 detects excessive radiation or harmful gas concentration and issues an alarm signal, the controller drives the extension end of the electric push rod 20 to retract.

[0034] In this embodiment, when the gas detector alarm 8 detects that the radiation dose or concentration of a specific harmful gas in the environment exceeds a preset safety threshold, it will immediately issue an alarm signal. After this signal is received by the controller connected to it, the controller will then drive the electric push rod 20 to move, pushing the insertion rod 15 to slide within the mounting groove 14 and quickly insert it into the insertion hole 6 on the door frame 1, thereby achieving automatic emergency locking of the door 2 and preventing personnel from entering or exiting in dangerous situations. Please refer to the details. Figures 1-8 The inner wall of the cavity 102 is coated with a metal shielding coating, and the corrugated barrier plate 13 is made of lead-based alloy.

[0035] In this embodiment, after the radiation rays penetrate the multi-layer composite material shielding layer of the door body 2, a small amount of scattered or secondary radiation may still act on the inner wall of the cavity 102. At this time, the metal shielding coating applied to the inner wall of the cavity 102 can effectively absorb and reflect this residual radiation, further improving the overall shielding effect. At the same time, the corrugated barrier plate 13 made of lead-based alloy not only has excellent physical support and extends the radiation path, but its high-density lead element also has a good attenuation ability for radiation, synergistically enhancing the shielding effectiveness with each functional material layer.

[0036] Please refer to the details. Figures 1-8 A sealing strip is embedded on the edge of the baffle 9.

[0037] In this embodiment, when the baffle 9 is installed into the opening of the cavity 102 by the mounting ring 10 and bolts 11, the sealing strip embedded in the edge of the baffle 9 is squeezed and deformed, tightly filling the gap between the baffle 9 and the edge of the opening of the cavity 102. This effectively prevents radiation from leaking out from the installation gap and also avoids dust and moisture from entering the cavity 102 and affecting the performance of the internal functional materials, thus ensuring the integrity and long-term effectiveness of the shielding system.

[0038] The working principle and usage process of this invention: The gas detection alarm 8, installed on the mounting plate 7 on one side of the door 2, continuously monitors the radiation dose and specific harmful gas concentration in the surrounding environment. The alarm signal is sent to the controller, which then sends a command to the locking mechanism. The electric push rod 20 is activated, and its extended end retracts rapidly. The retraction action is converted into the separation movement of the fixed plate 16 and the limiting plate 19 through the linkage mechanism composed of the tension plate 18 and four connecting rods 17. This forcefully pushes the insertion rod 15 out of the mounting groove 14, and the insertion rod 15 is precisely inserted into the door frame 1. In socket 6, the physical locking of door 2 is completed instantly, preventing anyone from entering or leaving the danger zone, thus achieving a transition from passive to active security. When door 2 is closed, its shielding system begins to operate. Dangerous rays sequentially penetrate the multi-layered structure within the cavity 102 of door frame 1. The first layer, epoxy resin 1201, initially absorbs and scatters radiation energy; the second layer, nano-tungsten carbide 1202, utilizes high-density nanomaterials to efficiently attenuate medium- and high-energy photons; the third layer, sound insulation cotton 1203, while providing sound insulation, its fiber structure further scatters particles; the fourth layer, nano-nitride... Boron composite material 1204: specifically designed for efficient absorption and moderation of neutron radiation; the fifth layer, high-density polyethylene 1205: further absorbs residual neutrons and attenuates gamma rays; the corrugated barrier plate 13 between the layers not only provides support, but its corrugated design also greatly extends the radiation penetration path, increasing the probability of radiation interacting with the functional materials, thereby exponentially improving shielding efficiency; the metal shielding coating on the inner wall of the cavity 102 provides the final reflection / absorption barrier, ensuring shielding integrity; after the gas detection alarm 8 confirms that the environmental parameters have returned to normal, authorized personnel can proceed. The alarm can be remotely or manually deactivated via the control system, and the electric push rod 20 can be extended to pull the plug rod 15 out of the plug hole 6, resetting the locking mechanism and restoring the door 2 to an openable state. Use tools to unscrew the bolts 11 of the fixing ring 10, and pull out the baffle 9 through the mounting ring 10. The sealing strip on the edge of the baffle 9 ensures the sealing of the cavity before disassembly. All functional layers in the cavity 102 can then be inspected and replaced as a whole or layer by layer. After maintenance, put the materials of each layer back in sequence, push the baffle 9 in, and tighten the bolts 11. Maintenance is convenient and does not require damage to the door structure.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightweight radiation shielding door based on nanocomposite materials, characterized in that: include: Door frame (1); Door body (2), which is movably hinged to door frame (1); The door frame (1) includes a solid door (101) and a cavity (102). Epoxy resin (1201), nano-tungsten carbide (1202), sound insulation cotton (1203), nano-boron nitride composite material (1204), and high-density polyethylene (1205) are arranged sequentially from top to bottom within the cavity (102). Multiple corrugated barrier panels (13) are respectively disposed between epoxy resin (1201), nano tungsten carbide (1202), sound insulation cotton (1203), nano boron nitride composite material (1204) and high-density polyethylene (1205); The locking mechanism is located inside the solid door (101). When the equipment senses radiation, it locks the door (2) to protect personnel safety. The mounting assembly is located inside the cavity (102) to facilitate the replacement of epoxy resin (1201), nano tungsten carbide (1202), sound insulation cotton (1203), nano boron nitride composite material (1204), high-density polyethylene (1205) and corrugated barrier plate (13).

2. The lightweight radiation shielding door based on nanocomposite materials according to claim 1, characterized in that: The locking mechanism includes a socket (6), a mounting plate (7), a gas detector alarm (8), a mounting groove (14), a plug rod (15), a fixing plate (16), a connecting rod (17), a tension plate (18), a limiting plate (19), and an electric push rod (20). The connecting rod (17) has four components. The mounting groove (14) is located on one side of the solid door (101). The electric push rod (20) is fixedly connected to the inner wall of one side of the mounting groove (14). The plug rod (15) is slidably connected within the mounting groove (14). The limiting plate (19) is fitted onto the circumferential surface of the plug rod (15). The fixing plate (16) is fixedly connected to the plug rod (15). On the circumferential surface, the tension plate (18) is located between the fixed plate (16) and the limiting plate (19). The extended end of the electric push rod (20) passes through the limiting plate (19) and is fixed to the tension plate (18). Two of the connecting rods (17) are connected to the fixed plate (16) through hinges, and the other two connecting rods (17) are connected to the limiting plate (19) through hinges. The close ends of the four connecting rods (17) are connected to the tension plate (18) through hinges. The insertion hole (6) starts from the inner wall of the door frame (1). The mounting plate (7) is fixedly connected to one side of the door body (2). The gas detection alarm (8) is installed in the mounting plate (7).

3. A lightweight radiation shielding door based on nanocomposite materials according to claim 2, characterized in that: The mounting assembly includes a baffle (9), a mounting ring (10), and a bolt (11). The baffle (9) is located inside the cavity (102), the mounting ring (10) is fixedly connected to one side of the baffle (9), and the bolt (11) is threaded into the mounting ring (10).

4. A lightweight radiation shielding door based on nanocomposite materials according to claim 3, characterized in that: A mounting frame (3) is fixedly connected to the other side of the door (2), and a fan (4) is installed inside the mounting frame (3).

5. A lightweight radiation shielding door based on nanocomposite materials according to claim 4, characterized in that: Two notice boards (5) are fixedly connected to the other side of the door (2).

6. A lightweight radiation shielding door based on nanocomposite materials according to claim 5, characterized in that: The solid door (101) and the cavity (102) are designed as a single unit.

7. A lightweight radiation shielding door based on nanocomposite materials according to claim 6, characterized in that: The electric push rod (20) is electrically connected to a controller, which is signal-connected to the gas detector alarm (8). When the gas detector alarm (8) detects excessive radiation or harmful gas concentration and issues an alarm signal, the controller drives the extension end of the electric push rod (20) to retract.

8. A lightweight radiation shielding door based on nanocomposite materials according to claim 7, characterized in that: The inner wall of the cavity (102) is coated with a metal shielding coating, and the corrugated barrier plate (13) is made of lead-based alloy.

9. A lightweight radiation shielding door based on nanocomposite materials according to claim 8, characterized in that: The edge of the baffle (9) is fitted with a sealing strip.

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