Fireproof low-magnetism freight magnetic shielding door with embedded escape door

Abstract

The utility model discloses a fireproof low magnetic freight transport magnetic shielding door with an embedded escape door, which comprises a freight transport door body and an escape door body, the freight transport door body is provided with a containing hole, the escape door body is installed in the containing hole, a magnetic shielding lap joint structure is arranged between the freight transport door body and the escape door body, and the escape door body is installed in the containing hole. The magnetic shielding lap joint structure comprises multiple layers of metal nets and magnetic material layers, and a complete magnetic shielding loop is formed through pressure connection. According to the structure, the escape function and the freight function are integrated, the space utilization rate is increased, the maintenance difficulty is lowered, a rapid evacuation channel is provided under the emergency situation, and therefore the comprehensive effect of high efficiency, safety and economy is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the magnetic shielding door manufacturing technical field especially to a fireproof low magnetic freight magnetic shielding door of inlaying escape door. BACKGROUND

[0002] With the development of magnetic shielding technology, people's exploration requirements for extremely weak magnetic field are more and more urgent. In order to enable the magnetic shielding facility to accommodate larger experimental equipment, the magnetic shielding door which takes into account the functions of magnetic shielding and equipment access also needs a larger area, and the opening and closing of the door leaf becomes very difficult and time-consuming. According to the fire protection requirements, the magnetic shielding facility must have an escape door. The magnetic shielding facility has a complex structure, high cost and limited internal space. The additional selection of location to build an escape door not only greatly increases the cost, but also occupies more internal space of the facility. On the other hand, the magnetic shielding freight door and the escape door are both part of the magnetic shielding facility, and they must have excellent magnetic shielding function, which also puts forward more stringent requirements on the structural design of the escape door.

[0003] The current scientific research in the field of low magnetic field in China is in a stage of vigorous development. Magnetic shielding facilities are being built in various places, and there is an urgent need for a more efficient magnetic shielding door solution to minimize construction costs and improve space utilization while ensuring magnetic shielding function.

[0004] For example, patent application No. CN202420249603.4 discloses a kind of anti-radiation electromagnetic shielding door, including door frame, the recess is formed in the inside of door frame, the hole is formed in the two side walls of door frame, the anti-radiation door is slidably connected in the recess, the iron block is inlaid in the side of anti-radiation door, a plurality of electromagnets are arranged on the side of door frame, the radiation sensor is installed on the inner side wall of door frame, and the controller is installed on the outer side wall of door frame.

[0005] The above-mentioned scheme sets up radiation sensor and controller. When the radiation sensor senses radiation inside, the controller receives the signal. Once someone pulls the handle, the alarm is triggered. Until there is no radiation inside, the electromagnet is powered off, and the anti-radiation door can be opened to prevent personnel from entering and ensure personnel safety. However, the door body still has the risk of magnetic leakage, which cannot guarantee the magnetic shielding integrity of the escape door body and the freight door body. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art mentioned in the background art, the present scheme solves the problem of large space occupation and high cost of traditional independent escape doors by means of the integrated design of the escape door and the freight door, while maintaining the performance of fireproofing and magnetic shielding. This structure integrates the functions of escape and freight transportation, improves the space utilization rate, reduces the maintenance difficulty, and provides a rapid evacuation channel in emergency situations, thereby achieving efficient, safe and economical comprehensive effects.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] A fireproof low-magnetic freight magnetic shielding door with an embedded escape door, comprising a freight door body and an escape door body, the freight door body is provided with a receiving hole, the escape door body is installed in the receiving hole, a magnetic shielding lap joint structure is arranged between the freight door body and the escape door body, the magnetic shielding lap joint structure comprises a composite metal layer and a magnetic material layer, and a complete magnetic shielding loop is formed through pressure connection. The combination of the composite metal layer and the magnetic material layer effectively shields electromagnetic interference (EMI), ensuring that the goods and personnel are not affected by the magnetic field while being fireproof. Pressure connection ensures the close fit between the two door bodies, preventing the magnetic shielding effect from being weakened due to gap problems. This scheme combines the dual requirements of fireproofing and low-magnetic shielding, and is suitable for environments with high electromagnetic compatibility requirements, such as sensitive electronic equipment transportation and storage sites. The embedded design of the escape door provides a convenient escape channel in emergency situations, improving safety. The design of the composite metal layer and the magnetic material layer greatly enhances the magnetic shielding effect, ensuring that the goods are not disturbed by external magnetic fields during transportation. Compared with common single fireproof or single magnetic shielding doors, this design combines the advantages of both, providing a more comprehensive solution. Further optimization can be achieved by introducing intelligent sensors to monitor the magnetic shielding effect and fire conditions, and adjusting the state of the shielding layer in real time, thereby achieving dynamic protection.

[0009] The edge of the receiving hole is provided with a door frame structure, the door frame structure and the escape door body are both made of magnetic shielding material, and the door frame structure and the escape door body are connected by an elastic sealing strip. The high magnetic permeability of the magnetic shielding material guides the external magnetic field to the surface of the door frame and the door body, thereby reducing the penetration of the magnetic field into the internal space. The addition of the elastic sealing strip not only provides good sealing effect, but also maintains continuous magnetic shielding contact during the opening and closing of the door body. By using magnetic shielding material at the key connection, the overall magnetic shielding effect can be significantly improved. Compared with the common scheme of coating the surface of the door body with magnetic shielding material, this structure design can better solve the problem of magnetic field leakage between the door frame and the door body. It improves the overall magnetic shielding performance, reduces electromagnetic interference, enhances the strength of the door body structure, and improves the sealing effect, which is conducive to improving the fireproofing performance.

[0010] As preferred, the freight door door body and the escape door door body are both multi-layer composite parts, including an outer fireproof layer, a middle magnetic shielding layer and an inner structural support layer, each layer is fixedly connected through a high-strength adhesive to form an integrated structure. The characteristics of different materials are used to meet multiple functional requirements. The outer fireproof layer uses materials with high temperature resistance and low thermal conductivity, such as ceramic fiber or intumescent fire retardant coating, which can effectively block the transmission of fire and heat. The middle magnetic shielding layer uses high magnetic permeability materials such as mu-metal or nanocrystalline soft magnetic alloy. According to the principle of electromagnetic shielding, by providing a low impedance path to guide the magnetic force lines around the shielding area. The inner structural support layer uses lightweight high-strength materials such as carbon fiber composite materials or aluminum alloy honeycomb panels to provide the necessary mechanical strength and stiffness. By reasonably allocating the thickness and material of each functional layer, the optimal balance of fireproofing, magnetic shielding and structural strength can be achieved in a limited space. Compared with traditional single-function door bodies, this scheme has significant advantages: more comprehensive overall performance, higher space utilization, and flexible adjustment of each layer ratio according to specific needs, improving the overall performance of the door body, reducing the overall weight, and simplifying the installation and maintenance process.

[0011] Further, the freight door door body and the escape door door body are respectively provided with independent locking mechanisms, the locking mechanisms include electromagnetic locks and / or mechanical locks, the electromagnetic locks are remotely controlled through a control system, and the mechanical locks can be manually opened in an emergency. Based on the combined application of electromagnetic force and mechanical force. The electromagnetic lock uses the magnetic force generated by the electromagnet to attract or repel the lock tongue, realizing the opening and closing control of the door. By adjusting the current size, the locking force can be controlled. The mechanical lock uses traditional mechanical structures such as springs, gears and cam mechanisms to realize locking through physical force. This dual locking mechanism can improve the reliability and safety of the system. The electromagnetic lock can realize remote control and intelligent management, while the mechanical lock serves as a backup system to ensure that the door body can be manually opened in the event of power failure or system failure, ensuring personnel safety evacuation. Compared with single locking mode, the system redundancy and flexibility are enhanced, and the overall safety level is improved. The organic combination of intelligent management and emergency operation enhances the anti-theft performance of the door body and improves the use convenience.

[0012] Further, a sealing structure is provided between the freight door body and the escape door body, which is a multiple sealing ring including an outer fireproof sealing ring, a middle magnetic shielding sealing ring, and an inner dustproof sealing ring, which are connected by elastic material to form a complete sealing system. Through the joint action of sealing rings with different functions, the door body achieves high efficiency in fireproofing, magnetic shielding, and dustproofing. Traditional single sealing structure cannot meet the multiple requirements of fireproofing, magnetic shielding, and dustproofing. The main function of the outer fireproof sealing ring is to prevent the spread of fire and high-temperature roasting in case of fire, which is usually made of high-temperature resistant material and can withstand long-term high temperature without losing effectiveness. The middle magnetic shielding sealing ring is used to block the penetration of the magnetic field to prevent external magnetic field from interfering with the internal equipment, which is particularly important for rooms containing sensitive electronic equipment. The inner dustproof sealing ring is used to prevent the invasion of dust and other small particles and maintain the cleanliness of the internal environment. Through the combination of multiple sealing rings, the functions of fireproofing, magnetic shielding, and dustproofing are integrated. In addition, the design of this sealing structure also considers the maintenance and replacement requirements in practical applications. The sealing ring connected by elastic material can be easily replaced, improving the maintainability and service life of the door.

[0013] Further, the periphery of the escape door body is provided with a raised edge structure, which matches the corresponding groove provided on the freight door body to form a labyrinth magnetic shielding structure, enhancing the magnetic shielding effect. Based on the principle of labyrinth sealing, by setting the raised edge structure on the periphery of the escape door body, it matches the corresponding groove on the freight door body to form multiple winding channels, which can effectively block or weaken the straight penetration of the magnetic field, thereby enhancing the magnetic shielding effect.

[0014] Traditional magnetic shielding doors may have insufficient shielding effectiveness, especially in high magnetic field environments. Simple shielding structures cannot meet the requirements. By setting the raised edge and the corresponding groove, not only the magnetic shielding effect of the door body is enhanced, but also the sealing and integrity of the door body are maintained, which is particularly important for occasions that require high magnetic shielding effectiveness. According to relevant literature in the field, a shielding design model is established based on the aperture coupling mechanism and the impedance transfer theory of conductive gaskets, which can calculate and optimize the shielding effectiveness. The design of the labyrinth structure can significantly improve the shielding effectiveness by increasing the number and complexity of the shielding layers, which is important for occasions that require strict control of the magnetic field environment, such as electromagnetic compatibility test laboratories, magnetic resonance areas of medical equipment, etc.

[0015] Further, the gap-filling mechanism is installed at the front end of the door frame structure; the gap-filling mechanism comprises a reversible gap-filling plate; a gap-filling foot is arranged below the gap-filling plate, and the gap-filling plate is flush with the ground when it is laid flat. The gap-filling mechanism is used to solve the gap problem between the freight door body and the ground, while ensuring the smooth movement of the freight door body and the flatness of the ground. When the freight door body is closed, the gap-filling plate is in a horizontal state and flush with the ground; when the freight door body is opened, the gap-filling plate is manually lifted to provide space for the door leaf to move. This design achieves dynamic balance between the moving space of the freight door body and the flatness of the ground, improves the safety and convenience of the opening and closing of the freight door body, and enhances the sealing and practicality of the entire magnetic shielding space. Compared with the common fixed ground track, the advantage of this design is that it can ensure the smooth movement of the freight door body while eliminating the impact of the ground groove on personnel and equipment access. The gap-filling mechanism is designed to be interlocked with the locking mechanism. When the freight door needs to be opened, the hand wheel is turned by manpower, and the torque is transmitted to the worm gear transmission mechanism on the side of the gap-filling plate through the belt pulley on the wheel shaft. The worm gear transmission mechanism can not only save labor, but also provide self-locking function to prevent the gap-filling plate from falling down due to its own gravity during lifting. The gap-filling plate and the locking mechanism have an interlocking function, and the gap-filling plate, the connecting rod, the sliding block and the interlocking stopper together constitute a crank slider mechanism. When the gap-filling plate is laid down, the interlocking stopper blocks the rotating shaft that drives the locking mechanism. A through hole is provided on the interlocking stopper, and when the gap-filling plate is completely lifted, the interlocking stopper is pushed upward, and the through hole is flush with the rotating shaft of the locking mechanism. At this time, the hand wheel can be removed and connected to the rotating shaft of the locking mechanism through the through hole, and the locking mechanism is driven. This interlocking function ensures that when the door leaf needs to be opened, the gap-filling plate must be lifted first before the locking mechanism is opened, preventing the door leaf from being damaged when the gap-filling plate is closed.

[0016] Further, the surface of the freight door body and the escape door body is covered with an electromagnetic shielding layer composed of nanoscale metal particles and conductive polymers, which is uniformly coated on the surface of the door body by electrostatic spraying technology. The reflection and absorption of conductive materials reduce the penetration of electromagnetic waves. Nanoscale metal particles have a very high surface-to-volume ratio, providing a large number of free electrons to reflect and absorb electromagnetic waves, while conductive polymers enhance this effect and provide good adhesion and mechanical strength. The electrostatic spraying technology ensures the uniformity and adhesion of the shielding layer, forming a continuous, highly conductive shielding layer on the surface of the door body. By using lightweight nanocomposites, the weight of the door body is significantly reduced, and the shielding effectiveness is also improved. In addition, the application of electrostatic spraying technology also makes the construction of the shielding layer more efficient and uniform, improving the consistency and reliability of the product.

[0017] As a preferred, the escape door body is provided with an emergency opening mechanism, which includes a mechanical emergency handle and a hydraulic quick opening device. The mechanical handle is placed on both sides of the escape door, and the hydraulic device is built into the door body structure, which can quickly release pressure to open the escape door in emergency situations. Through the combination of mechanical and hydraulic methods, it ensures that the escape door can be quickly opened in emergency situations. The mechanical emergency handle provides a direct manual operation method, which can be used as a backup solution when the power or hydraulic system fails. The hydraulic quick opening device uses fluid pressure to quickly release the door body locking mechanism to achieve quick door opening, which is crucial for quickly evacuating personnel in fire or other emergency situations. Time is very valuable in emergency situations, and any delay in opening the door can have serious consequences. Therefore, the escape door needs to be able to quickly open in various situations, including when the power or mechanical locking system fails. The dual protection of the mechanical handle and hydraulic device provides higher safety and reliability.

[0018] As a preferred, the edges of the freight door body and the escape door body are provided with detachable maintenance panels connected to the door body through quick connectors, which facilitate the maintenance and replacement of internal magnetic shielding materials and electronic components. The detachability of the maintenance panel allows maintenance personnel to quickly remove the panel and directly access the critical components inside the door body, thereby improving the efficiency and convenience of maintenance. The use of quick connectors further simplifies the process of disassembly and reinstallation, ensuring the stability and sealing of the maintenance panel after maintenance. By providing detachable maintenance panels, necessary maintenance work can be quickly performed without affecting the overall structure and function of the door body.

[0019] Therefore, the utility model has the following beneficial effects:

[0020] By integrating the escape door into the magnetic shielding freight door, the need for additional escape door construction is reduced, thereby saving space within the magnetic shielding facility and improving space utilization.

[0021] Since the escape door is embedded in the freight door, the construction cost of the independent escape door is reduced, and the overall cost is also reduced, achieving cost-effective optimization.

[0022] The escape door and the freight door share the door leaf and door frame structure, reducing changes to the original scheme, simplifying the structure, reducing maintenance difficulty, and improving maintenance efficiency.

[0023] The escape door and the freight door both have qualified magnetic shielding lap joint structures, ensuring the continuity and integrity of the magnetic shielding, and ensuring the magnetic shielding effect within the facility.

[0024] The existing freight door body and door frame are used, reducing the number of additional door leaves, so that the freight door has the function of the escape door without increasing the additional space occupation, meeting the fire protection requirements. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the installation of the escape door body in this utility model.

[0027] Figure 3 yes Figure 2 A schematic diagram of the magnetic shielding overlap in the cross-sectional view of the door leaf at point A.

[0028] Figure 4 This is a schematic diagram of the opening and closing of the escape door in this utility model.

[0029] Figure 5 This is a schematic diagram of the opening and closing of the freight door in this utility model.

[0030] Figure 6 This is a schematic diagram of the groove-filling transmission mechanism in this utility model.

[0031] In the diagram: 1. Freight door body, 2. Escape door body, 3. Reception hole, 4. Magnetic shielding overlap structure, 5. Composite metal layer, 6. Magnetic material layer, 7. Door frame structure, 8. Elastic sealing strip, 9. Multi-layer composite material component, 10. Outer fireproof layer, 11. Middle magnetic shielding layer, 12. Inner structural support layer, 13. Locking mechanism, 14. Mechanical lock, 15. Sealing structure, 16. Edge structure, 17. Grooving plate, 18. Grooving transmission mechanism, 19. Control box. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figure 1 , 2As shown, the fireproof low-magnetic freight magnetic shielding door with embedded escape door of the present application integrates the functions of traditional independent escape door and freight door in one structure, ensuring magnetic shielding effect, improving space utilization and reducing cost. The overall structure of the door is composed of a freight door body and an escape door body, and the escape door body is embedded in a specially designed accommodating hole 3 on the freight door body. In this embodiment, it allows quick conversion to an escape passage in emergency situations, while serving as a freight passage in daily use, realizing dual functions. The freight door body 1 and the escape door body 2 are both made of a multi-layer composite material 9, each layer having a different function: an outer fireproof part 10, a middle magnetic shielding part 11, and an inner structural support part 12. These parts are fixedly connected by high-strength adhesive to form a solid integrated structure. The multi-layer structure design of the door body not only provides the necessary fireproof and magnetic shielding performance, but also ensures the mechanical strength and durability of the door body. The periphery of the escape door body is designed with a raised edge structure 16, which matches the corresponding groove on the freight door body, forming a labyrinth magnetic shielding structure. This structure effectively enhances the magnetic shielding effect by increasing the propagation path and obstacles of the magnetic field lines. In addition, the magnetic shielding lap joint structure 4 between the escape door body and the freight door body, including a composite metal layer 5 and a magnetic material layer 6, forms a complete magnetic shielding loop through pressure connection, further ensuring the isolation of the magnetic field; the composite metal layer 5 has good electrical conductivity, which can ensure continuous magnetic shielding, and in this embodiment, the composite metal layer 5 can be made of copper plate, aluminum-copper or copper-aluminum alloy, with the cost decreasing in turn. Among them, the copper plate has the best electrical conductivity, but it is heavier and more expensive; aluminum-copper combines the electrical conductivity of copper and the lightweight properties of aluminum, which is cheaper than pure copper; it also includes but is not limited to copper-clad steel and silver-plated parts, and the structure includes but is not limited to plates and grid structures, ensuring structural continuity while maintaining magnetic shielding continuity.

[0035] In this embodiment, a magnetic shielding lap joint structure 4 is also provided between the freight door body and the door frame structure. The edge of the freight door body is provided with a door frame structure 7, and the door frame structure is connected with the escape door body through an elastic sealing strip 8 to form a magnetic shielding connection. In this embodiment, not only good sealing is provided, but also easy installation and maintenance. At the same time, the independent locking mechanism 13 provided on the door body includes a mechanical lock 14, which can be manually opened in emergency situations, providing flexible opening mode.

[0036] In this embodiment, the edge of the accommodating hole is provided with a door frame structure 7, and the door frame structure and the escape door body are both made of magnetic shielding material. The door frame structure and the escape door body are connected by an elastic sealing strip to form a magnetic shielding connection. By using the high magnetic permeability characteristic of the magnetic shielding material, the external magnetic field is guided to the surface of the door frame and the door body, thereby reducing the penetration of the magnetic field into the internal space. The addition of the elastic sealing strip not only provides good sealing effect, but also maintains continuous magnetic shielding contact during the opening and closing of the door body. By using magnetic shielding material at the key connection, the overall magnetic shielding effect can be significantly improved. Compared with the common scheme of coating the surface of the door body with magnetic shielding material, this structure design can better solve the problem of magnetic field leakage between the door frame and the door body. It improves the overall magnetic shielding performance, reduces electromagnetic interference, enhances the strength of the door body structure, improves the sealing effect, and is conducive to improving the fireproof performance.

[0037] As shown in Figure 3 、 4 In this embodiment, the freight door body and the escape door body are both made of a multi-layer composite material 9, which includes an outer fireproof layer 10, a middle magnetic shielding layer 11, and an inner structural support layer 12. Each layer is fixedly connected by a high-strength adhesive to form an integrated structure. Different materials are used to meet multiple functional requirements. The outer fireproof layer uses materials with high temperature resistance and low thermal conductivity, such as ceramic fiber or intumescent fire retardant paint, which can effectively block the transmission of flame and heat. The middle magnetic shielding layer uses high magnetic permeability materials, such as or nanocrystalline soft magnetic alloy, which provides a low impedance path to guide the magnetic field lines around the shielding area according to the principle of electromagnetic shielding. The inner structural support layer uses lightweight high-strength materials, such as carbon fiber composite materials or aluminum alloy honeycomb panels, to provide the necessary mechanical strength and stiffness. By reasonably distributing the thickness and material of each functional layer, an optimal balance between fireproofing, magnetic shielding, and structural strength can be achieved in a limited space. Compared with traditional single-function door bodies, this scheme has significant advantages: more comprehensive overall performance, higher space utilization, and flexible adjustment of layer ratios according to specific needs. It improves the comprehensive performance of the door body, reduces the overall weight, and simplifies the installation and maintenance process.

[0038] In addition, the freight door body and the escape door body are respectively provided with independent locking mechanisms 13, the locking mechanisms 13 include electromagnetic locks and mechanical locks, the electromagnetic locks are remotely controlled through a control system, and the mechanical locks can be manually opened in an emergency. The locking mechanisms are based on the combination of electromagnetic force and mechanical force. A sealing structure 15 is arranged between the freight door body and the escape door body, the sealing structure is a multiple sealing ring, includes an outer fireproof sealing ring, a middle magnetic shielding sealing ring and an inner dustproof sealing ring, and the three are connected through elastic materials to form a complete sealing system. The escape door body is provided with a raised edge structure 16 around the escape door body, the edge structure 16 is matched with a corresponding groove arranged on the freight door body to form a labyrinth magnetic shielding structure, and the magnetic shielding effect is enhanced. Based on the principle of labyrinth sealing, the raised edge structure 16 is arranged around the escape door body, is matched with the corresponding groove on the freight door body to form multiple winding channels, the channels can effectively block or weaken the straight-line penetration of the magnetic field, and the magnetic shielding effect is enhanced.

[0039] The electromagnetic lock uses the magnetic force generated by the electromagnet to attract or repel the lock tongue, realizing the opening and closing control of the door. By adjusting the current size, the locking force can be controlled. The mechanical lock uses traditional mechanical structures such as springs, gears and cam mechanisms to realize locking through physical force. This double locking mechanism improves the reliability and safety of the system. The electromagnetic lock can realize remote control and intelligent management, while the mechanical lock serves as a backup system to ensure that the door body can be manually opened in the event of power failure or system failure, ensuring personnel safety evacuation. Compared with single locking mode, the system redundancy and flexibility are enhanced, and the overall safety level is improved. The organic combination of intelligent management and emergency operation enhances the anti-theft performance of the door body and improves the use convenience. Different functional sealing rings work together to ensure that the door body achieves high efficiency in fireproofing, magnetic shielding and dustproofing. Traditional single sealing structure cannot meet the multiple requirements of fireproofing, magnetic shielding and dustproofing. The main function of the outer fireproof sealing ring is to prevent the spread of fire and high-temperature roasting in the event of fire, which is usually made of high-temperature resistant material and can withstand long-term high temperature without losing its ability. The middle magnetic shielding sealing ring is used to block the penetration of the magnetic field to prevent external magnetic field from interfering with the internal equipment, which is particularly important for rooms containing sensitive electronic equipment. The inner dustproof sealing ring is used to prevent the invasion of dust and other small particles to maintain the cleanliness of the internal environment. Through the combination of multiple sealing rings, multifunctional integration of fireproofing, magnetic shielding and dustproofing is realized. In addition, the design of this sealing structure also considers the maintenance and replacement requirements in practical application. The sealing ring connected by elastic materials can be easily replaced, improving the maintainability and service life of the door.

[0040] As Figure 5 , 6As shown, the present embodiment also includes a supplemental slot mechanism for the movement of the freight door body, which is installed at the front end of the door frame; the supplemental slot mechanism includes a reversible supplemental slot plate 17; the lower part of the supplemental slot plate 17 is a grid structure, which can improve the carrying capacity, and the supplemental slot plate is flush with the ground when it is flat. The supplemental slot mechanism is used to solve the gap problem between the freight door body and the ground, while ensuring the smooth movement of the freight door body and the flatness of the ground. When the freight door body is closed, the supplemental slot plate is in a horizontal state and flush with the ground; when the freight door body is opened, the supplemental slot plate 17 is driven to flip up through the supplemental slot transmission structure 18, leaving a moving space for the door leaf, realizing the dynamic balance of the moving space of the freight door body and the flatness of the ground, improving the safety and convenience of the opening and closing of the freight door body, and enhancing the sealing and practicality of the entire magnetic shielding space. Compared with the common fixed ground track, it can ensure the smooth movement of the freight door body while eliminating the influence of the ground groove on personnel and equipment passing.

[0041] It is worth noting that the surface of the freight door body and the escape door body is covered with an electromagnetic shielding layer composed of nanoscale metal particles and conductive polymers, which is uniformly coated on the surface of the door body by electrostatic spraying technology. The reflection and absorption of conductive materials reduce the penetration of electromagnetic waves. Nanoscale metal particles have a very high surface area to volume ratio, providing a large number of free electrons to reflect and absorb electromagnetic waves, while conductive polymers enhance this effect and provide good adhesion and mechanical strength. The electrostatic spraying technology ensures the uniformity and adhesion of the shielding layer, forming a continuous, high-conductivity shielding layer on the surface of the door body. By using lightweight nanocomposites, the present scheme significantly reduces the weight of the door body while improving the shielding effectiveness. In addition, the application of electrostatic spraying technology also makes the construction of the shielding layer more efficient and uniform, improving the consistency and reliability of the product.

[0042] In the present embodiment, we first consider the installation process of the fireproof low-magnetic freight magnetic shielding door with embedded escape door. Before installation begins, first ensure that the size of the door opening matches the size of the freight door body and the escape door body. During installation, the escape door body is embedded in the specially designed accommodation hole on the freight door body, which requires precise alignment to ensure the sealing and magnetic shielding effect between the door bodies. Then, connect the door frame structure and the escape door body with elastic sealing strips to form a magnetic shielding connection. This step requires special attention to the compression rate of the sealing strip to ensure the tightness and durability of the connection. Then install the locking mechanism 13, including the electromagnetic lock and the mechanical lock. The installation of the electromagnetic lock needs to be connected with the control system to ensure the reliability of remote control. The mechanical lock needs to be installed at an easily accessible location on the escape door body to allow for quick manual opening in emergency situations. The installation of the locking mechanism 13 must ensure its stability and response speed to ensure rapid unlocking in emergency situations.

[0043] During installation, special attention must also be paid to the multi-layer composite structure of the door body. The adhesion of the outer fireproof layer, the intermediate magnetic shielding layer, and the inner structural support layer must be strong to ensure the overall strength and functionality of the door body. The use of high-strength adhesives must be carried out according to the manufacturer's instructions to ensure that the adhesive achieves optimal adhesion under specified time and temperature conditions.

[0044] It is worth noting that a low-magnetic door closer is also installed between the escape door body and the freight door body, ensuring a low-magnetic environment. It can be made of titanium alloy to effectively reduce residual magnetism.

[0045] After installation, a series of tests must be performed to ensure that all functions of the door body are normal. First, a magnetic shielding effect test is performed to detect whether the magnetic shielding effect of the door body meets the design requirements through professional magnetic flux measurement equipment. Second, a fireproof test is performed to simulate a fire environment and test the fireproof performance of the door body. Finally, an escape door opening test is performed to ensure that the escape door can be quickly and smoothly opened in an emergency.

[0046] In practical applications, the door body structure of the present application can be widely used in facilities that require magnetic shielding and fireproofing, such as magnetic resonance rooms in hospitals and electromagnetic compatibility test laboratories in military facilities. In these application scenarios, the door body not only needs to provide effective magnetic shielding to protect internal equipment from external magnetic field interference, but also needs to have fireproofing function to ensure personnel safety. In addition, the integrated design of the escape door allows personnel to evacuate quickly in an emergency, improving the safety of the facility.

[0047] In production practice, the door body structure of the present application can improve efficiency and reduce costs through standardized production processes. For example, through automated adhesion and sealing processes, the consistency and reliability of the door body structure can be ensured. At the same time, through modular design, the installation process can be simplified, reducing the time and complexity of on-site installation.

[0048] Example 2

[0049] In this embodiment, the escape door body is provided with an emergency opening mechanism, which includes a mechanical emergency handle and a hydraulic quick opening device. The mechanical handle is placed on both sides of the escape door, and the hydraulic device is built into the door body structure. In an emergency, the pressure can be quickly released to open the escape door. Through the combination of mechanical and hydraulic methods, it is ensured that the escape door can be quickly opened in an emergency. The mechanical emergency handle provides a direct manual operation method, which can be used as a backup solution when the power or hydraulic system fails. The hydraulic quick opening device uses fluid pressure to quickly release the door body locking mechanism to achieve quick door opening, which is crucial for quickly evacuating people in fire or other emergency situations. Time is very valuable in an emergency, and any delay in opening the door can have serious consequences. Therefore, the escape door needs to be able to open quickly in various situations, including when the power or mechanical locking system fails. The dual protection of the mechanical handle and the hydraulic device provides higher safety and reliability.

[0050] In addition, different magnetic shielding materials such as high-conductivity metal composites can also be considered to improve the magnetic shielding effect. In addition, the opening mechanism of the escape door can use more advanced power-assisted systems such as electric push rods to further improve the speed and efficiency of the escape door opening. In summary, the embedded escape door of the fireproof low-magnetic cargo magnetic shielding door needs to consider the stability of the structure, the reliability of the function and the rapid response ability in emergency situations during installation and use. Through precise installation and strict testing, it can be ensured that the door body can play its designed function in actual application, providing an efficient, safe and economical magnetic shielding and escape solution.

Claims

1. A fireproof, low-magnetic, magnetically shielded cargo door with an embedded escape door, characterized in that, It includes a cargo door and an escape door. The cargo door has a receiving hole, and the escape door is installed in the receiving hole. A magnetic shielding overlap structure is provided between the cargo door and the escape door. The magnetic shielding overlap structure includes a composite metal layer and a magnetic material layer, which are connected by pressure to form a complete magnetic shielding circuit.

2. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door as described in claim 1, characterized in that, The edge of the receiving hole is provided with a door frame structure. Both the door frame structure and the escape door body are made of magnetic shielding material. The door frame structure and the escape door body are connected by an elastic sealing strip to form a magnetic shielding connection.

3. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door as described in claim 1, characterized in that, Both the cargo door and the escape door are made of multi-layer composite materials, including an outer fireproof layer, a middle magnetic shielding layer, and an inner structural support layer. Each layer is fixedly connected by a high-strength adhesive to form an integrated structure.

4. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door as described in claim 1, characterized in that, The cargo door and the escape door are each equipped with an independent locking mechanism, which includes an electromagnetic lock and / or a mechanical lock. The electromagnetic lock is remotely controlled through a control system, while the mechanical lock can be manually opened in an emergency.

5. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door according to any one of claims 1-4, characterized in that, A sealing structure is provided between the cargo door and the escape door. The sealing structure consists of multiple sealing rings, including an outer fireproof sealing ring, a middle magnetic shielding sealing ring, and an inner dustproof sealing ring. The three are connected by an elastic material to form a complete sealing system.

6. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door according to any one of claims 1-4, characterized in that, The escape door has a raised edge structure around its perimeter, which matches the corresponding groove on the cargo door to form a maze-like magnetic shielding structure, enhancing the magnetic shielding effect.

7. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door as described in claim 1, characterized in that: It also includes a grooving mechanism, which is installed at the front end of the door frame; the grooving mechanism includes a flip-up grooving plate; a grooving foot is provided under the grooving plate, and the grooving plate is flush with the ground when it is laid flat.

8. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door as described in claim 1, characterized in that, The surfaces of the cargo door and the escape door are covered with an electromagnetic shielding layer, which is composed of nanoscale metal particles and conductive polymers and is uniformly coated on the surface of the door using electrostatic spraying technology.

9. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door according to claim 1, characterized in that, The escape door is equipped with an emergency opening mechanism, which includes a mechanical emergency handle and a hydraulic quick-opening device. The mechanical handle is located on both the inner and outer sides of the escape door, and the hydraulic device is built into the door structure, which can quickly release pressure to open the escape door in an emergency.

10. The fireproof, low-magnetic freight magnetic shielding door with an embedded escape door according to claim 1, characterized in that, The edges of the cargo door and the escape door are equipped with detachable inspection panels, which are connected to the door body via quick-connect fittings, facilitating the maintenance and replacement of internal magnetic shielding materials and electronic components.

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