Airtight protection type anti-radiation electric sliding door

Abstract

The invention discloses a closed protection type anti-radiation electric sliding door which comprises a power beam fixedly installed on a wall body, a door body hung on the power beam and a closed protection device, and the closed protection device comprises a lifting threshold assembled at the bottom of the door body, an auxiliary rail fixedly arranged on the wall body and a suspension assembly. Lead plates are arranged in the door body and the lifting threshold, an overlapped protection area is formed, the auxiliary rail is provided with a sedimentation groove matched with the closed station, and the suspension assembly and a traction rope form a mechanical linkage mechanism through a lifting hanger, a nylon roller and a traction rope. When the door body is closed, the nylon roller slides into the settlement groove along the auxiliary rail to drive the lifting hanger to sink, and the lifting doorsill is pulled by the traction rope to move downwards relative to the door body to shield the bottom gap; when the door body is opened, the nylon roller is separated from the settlement groove to reset the lifting hanger, and the lifting doorsill is pulled to move upwards to avoid friction interference. The radiation barrier effect is remarkably improved, the operation stability is optimized, and the multi-scene high-grade protection requirements of the medical radiology department, the nuclear industry laboratory and the like are met.

Description

Technical Field

[0001] This invention belongs to the field of radiation protection door technology, specifically relating to a sealed and protective electric sliding door for radiation protection. Background Technology

[0002] Radiation-proof electric sliding doors are core protective equipment in radiation scenarios such as medical radiology departments, and belong to the intelligent upgrade type of radiation-proof lead doors. Their core protection principle utilizes the high atomic number of lead, weakening ionizing radiation energy through lead plates built into the door leaf to block radiation leakage. They also feature automatic opening and closing functions controlled by sensors or authorization. Due to their top-mounted installation structure, large span adaptability, and convenient passage, they have become the mainstream choice for medical radiology and treatment scenarios.

[0003] To avoid door scratches caused by uneven ground, existing radiation-proof electric sliding doors require a 5mm gap between the door and the highest point of the ground during installation. However, this installation method has a critical flaw: due to insufficient ground construction precision or wear, the gap between the door and the lowest point of the ground often far exceeds the reserved value, sometimes even reaching over 10mm, resulting in excessive radiation leakage at the bottom of the door. Ionizing radiation has strong penetrating power, and a large amount of radiation leakage not only fails to meet the stringent radiation protection requirements of medical settings but also poses a potential risk to the health of medical staff and surrounding personnel who are in the treatment environment for extended periods, severely limiting its applicability in high-protection scenarios.

[0004] As radiation doses from medical radiology equipment increase, the industry's requirements for protection levels are becoming increasingly stringent. Excessive bottom leakage radiation in existing products has become a core pain point. Therefore, there is an urgent need for a sealed, radiation-proof electric sliding door that can specifically address the issue of large bottom gap leakage while ensuring both protection and stable operation, thus overcoming the shortcomings of existing technology. Summary of the Invention

[0005] To address the problems and shortcomings of the existing technologies, this invention provides a sealed, protective, radiation-proof electric sliding door that significantly improves radiation blocking effect, optimizes operational stability, and is suitable for high-level protection needs in various scenarios such as medical radiology departments and nuclear industry laboratories.

[0006] This invention is achieved through the following technical solution: A sealed, radiation-proof electric sliding door, characterized in that it includes a power beam fixed to the wall, a door body hanging on the power beam, and a sealed protective device. The airtight protective device includes a lifting threshold mounted at the bottom of the door, a sub-rail fixed to the wall, and a suspension assembly. The lifting threshold and the door have an overlapping area and both are equipped with lead plates. The secondary rail is provided with a settling groove corresponding to the closing position. The suspension components include a lifting bracket installed on the top of the door, nylon rollers fixed to the lifting bracket, and traction ropes connecting the lifting bracket and the lifting threshold. When the door is closed, the nylon rollers move along the secondary rail to the settling groove, the lifting bracket sinks and pulls the lifting threshold downward relative to the door through the traction rope to partially cover the gap between the door and the ground; when the door is opened, the nylon rollers disengage from the settling groove, the lifting bracket resets and pulls the lifting threshold upward through the traction rope to avoid friction interference with the ground.

[0007] This innovative system, based on the core principles of "door movement - mechanical linkage - gap shielding," transforms the horizontal translation of the door into the vertical lifting motion of the threshold through the precise coordination of the settling groove and suspension components. It completely eliminates the reliance on additional drive motors, control systems, and power supply modules found in existing technologies, fundamentally addressing the industry pain points of complex structures, high manufacturing costs, and high failure risks associated with electronic drive solutions. The overlapping area design of the door and threshold allows the built-in lead plates to form a continuous and complete protective barrier, ensuring that the gap between the door and the ground is covered, reducing radiation exposure and enhancing the protective effect. The mechanical linkage structure requires no electronic components and possesses strong environmental adaptability, maintaining stable operation even under harsh conditions such as radiation, humidity, and temperature fluctuations. This technological concept breaks through traditional thinking limitations, exhibiting outstanding substantive features and significant technological advancements, providing a more reliable solution for high-level radiation protection.

[0008] Furthermore, two sets of suspension components are symmetrically arranged along the width of the door, corresponding to both ends of the lifting threshold. By symmetrically arranging these two sets of suspension components along the width of the door and positioning them at both ends of the lifting threshold, it is ensured that the lifting threshold experiences uniform and symmetrical force at both ends during lifting, effectively avoiding problems such as tilting, jamming, or asynchronous lifting caused by unilateral force, and significantly improving the operational stability of the linkage mechanism. The nylon rollers of the two sets of suspension components synchronously enter or disengage from the settling groove, ensuring a high degree of synchronization in the lifting threshold's movement, ensuring uniform coverage of the bottom gap, and avoiding potential radiation leakage hazards caused by incomplete lifting in certain areas. The balanced force distribution reduces localized wear between components, extends the service life of key components such as the lifting threshold and traction ropes, further enhances the long-term operational reliability of the entire technical solution, and provides structural protection for the stable operation of the equipment.

[0009] Furthermore, when the door is in the open state, the bottom of the lifting threshold is flush with the bottom of the door. The depth of the settling groove shall not be less than the distance from the lowest point of the lifting threshold to the ground.

[0010] By ensuring the bottom of the sliding door sill is flush with the bottom of the door when it is open, the risk of friction interference between the sill and the ground or obstacles during door movement is minimized, ensuring smooth opening and closing and improving passage efficiency. The precise matching of the recessed groove size to the sliding door sill's travel distance guarantees reliable contact with the ground or the formation of a small gap that meets protection requirements when the door is closed, avoiding protection failure due to structural dimensional mismatch. This design balances smooth operation in the open state with effective protection in the closed state, further enhancing the practicality of the technical solution. It can adapt to installation scenarios with varying ground flatness, improving the stability and consistency of the protective effect.

[0011] Furthermore, both the door body and the rising threshold utilize double-layer lead plates, with the rising threshold installed inside the door. This composite structure design, combining double-layer lead plates with a radiation-shielding filling layer, significantly enhances the blocking ability and attenuation efficiency against ionizing radiation compared to traditional single-layer lead plate protection structures. It effectively reduces the penetration of high-dose radiation, meeting the stringent requirements of high-level protection scenarios. The placement of the rising threshold inside the door, combined with a rationally designed overlapping area, creates a complementary and synergistic effect between the door and threshold protection structures. Even if the gap between the door and the ground fluctuates due to installation environment, wear and tear, reliable blocking is still achieved through the protective coverage of the overlapping area, reducing blind spots. This structural design expands the product's applicability, adapting to the protection needs of scenarios such as medical radiation equipment upgrades and increased radiation doses in the nuclear industry, ensuring stable protective performance during long-term use.

[0012] Furthermore, a first linear bearing is fixedly installed at the bottom of the door corresponding to the position of the lifting threshold, and a first positioning pin adapted to the first linear bearing is fixedly installed at the top of the lifting threshold. The first positioning pin and the first linear bearing form a sliding guide engagement.

[0013] The first linear bearing at the bottom of the door and the first locating pin at the top of the lifting threshold form a precise sliding guide engagement. This strictly limits the lifting threshold's freedom of movement, ensuring it can only move vertically. This effectively prevents horizontal deviation, swaying, or twisting during lifting, guaranteeing the threshold accurately aligns with the gap between the door and the ground for effective shielding, ensuring precise protective positioning. The sliding guide engagement structure reduces contact friction between the lifting threshold and the door, lowers wear and tear on components, and improves the smoothness and flexibility of the lifting action, preventing jamming caused by excessive frictional resistance. This design further optimizes the operational stability of the mechanical linkage mechanism, extends the service life of components, ensures precise and controllable protective actions, and provides guiding assurance for the reliable implementation of the overall technical solution.

[0014] Furthermore, a second linear bearing is fixedly installed at the top of the door corresponding to the position of the lifting bracket, and a second positioning pin is fixedly installed at the bottom of the lifting bracket to cooperate with the second linear bearing, with the second positioning pin and the second linear bearing forming a sliding fit.

[0015] The second linear bearing at the top of the gate and the second locating pin at the bottom of the lifting bracket form an efficient sliding fit, providing precise guidance and constraint for the lowering and resetting movement of the lifting bracket. This ensures that the movement trajectory of the lifting bracket is consistent with the translation trajectory of the gate, avoiding problems such as uneven force, twisting, or jamming of the traction rope due to lifting bracket misalignment. The precise guidance allows the nylon rollers to smoothly enter and exit the settling groove, improving the synchronization and accuracy of the linkage action. This ensures that the lowering stroke of the lifting bracket precisely matches the lowering stroke of the lifting sill, guaranteeing the effectiveness of the protective action. This design reduces the operating resistance and component wear of the linkage mechanism, improves the overall operational stability and service life of the device, and fully utilizes the synergistic effect of the mechanical linkage.

[0016] Furthermore, polyurethane wheels are installed at the bottom of both ends of the lifting threshold.

[0017] The polyurethane wheels installed at both ends of the sliding door sill convert the sliding friction between the sill and the ground into rolling friction, significantly reducing friction loss and effectively extending the service life of both the sill and the ground, thus reducing the frequency of routine maintenance. The polyurethane material possesses excellent elasticity and quiet operation properties, effectively absorbing impact energy during lifting and reducing noise during operation, improving the user experience in environments with high noise requirements, such as medical clinics and laboratories. Simultaneously, the soft polyurethane material prevents scratches or damage when the sill contacts the ground, protecting the integrity of the installation environment. This technical solution ensures both protective performance and operational stability while also considering user experience and environmental protection, enhancing the product's overall competitiveness.

[0018] Furthermore, both ends of the traction rope are equipped with self-locking buckles. One end is detachably locked to the lifting bracket via the self-locking buckle, and the other end is detachably locked to the lifting threshold via the self-locking buckle.

[0019] The self-locking buckles at both ends of the traction rope enable a detachable locking connection between the traction rope and the lifting bracket / sill. When the traction rope suffers wear, aging, or breakage, the entire de-locking protection device can be quickly removed and replaced using only the self-locking buckles, without the need for complete disassembly. This significantly reduces maintenance difficulty and costs, improving the maintainability of the equipment. The stainless steel wire rope used in the traction rope possesses excellent tensile strength and corrosion resistance, precisely matching the weight requirements of the lifting sill and effectively preventing breakage due to insufficient rope strength, ensuring the continuity and reliability of the protective action. This design balances equipment safety and ease of maintenance, extends the product's lifespan, reduces overall user costs, and enhances the market applicability of the technical solution.

[0020] Furthermore, an external guide block is fixed at the ground, and a limiting groove is provided on the inner side of the external guide block. The bottom of the door is vertically assembled to the limiting groove, and the door slides in conjunction with the external guide block.

[0021] The ground-fixed external guide block slides into the bottom of the door through an inner limiting groove, effectively limiting the door's lateral deviation and tilt during translation. This ensures the door always opens and closes along a preset trajectory, avoiding problems such as uneven bottom gaps or misalignment of protective components caused by door tilting. Precise trajectory constraints ensure accurate alignment of the door with the closing position when closed, indirectly guaranteeing the protective effect of the airtight safety device and ensuring the lifting threshold accurately covers the bottom gap. This design allows the technical solution to adapt to complex installation scenarios such as large door spans and uneven ground, improving the product's environmental adaptability. Even under harsh installation conditions, it maintains stable operation and reliable protective performance, expanding the product's application boundaries.

[0022] Furthermore, a buffer ramp is provided between the bottom of the settling groove and the surface of the secondary rail. This buffer ramp ensures a smooth transition for the nylon rollers as they enter and exit the settling groove, avoiding impact damage from rigid collisions, reducing stress concentration on key components such as the nylon rollers and lifting brackets, and effectively extending their service life. The smooth surface of the buffer ramp reduces the rolling resistance of the nylon rollers, further improving the smoothness of the door opening and closing process, while also reducing frictional noise during operation and improving the user experience. This design, by optimizing the contact transition between components, reduces the operating losses of the mechanical linkage mechanism, improves the operational stability and quietness of the equipment, and simultaneously optimizes the user experience and long-term reliability of the technical solution, making it suitable for high-frequency opening and closing scenarios.

[0023] The beneficial effects of this invention are: The airtight, radiation-proof electric sliding door of this invention is based on a novel technical concept. Through multi-structure collaborative optimization and innovative design, it achieves a comprehensive breakthrough in radiation protection, operational performance, user experience, and ease of maintenance, demonstrating significant technical advantages and practical value.

[0024] The core innovation lies in breaking through the traditional logic of existing technologies that rely on additional power to drive protective components. It constructs an integrated protection system of "door movement - mechanical linkage - gap shielding". By utilizing the mechanical energy of the door's own translation process, combined with the precise cooperation of the sub-rail's sinking groove and the suspension components, the horizontal movement of the door is efficiently converted into the vertical lifting action of the door sill. There is no need to configure additional drive motors, control systems and power supply modules, which simplifies the equipment structure from the root and greatly reduces the risk of electronic component failure and circuit damage. At the same time, it gives the equipment a strong environmental adaptability, and can maintain a stable and reliable operating state even in harsh working conditions such as high radiation intensity, humidity and dust, and large temperature fluctuations.

[0025] Both the door body and the lifting threshold have built-in lead plates, forming a scientifically designed overlapping protective area. Combined with the composite protective structure of double-layer lead plates and radiation-proof filling layer, a continuous radiation barrier is constructed, which can effectively reduce the penetration of high-dose ionizing radiation and completely solve the problem of excessive radiation leakage caused by the bottom gap of existing products. It meets the stringent requirements of high-standard protection scenarios such as medical radiation and nuclear industry experiments.

[0026] In terms of operational stability, two sets of suspension components symmetrically arranged along the width of the door ensure that the force on both ends of the lifting threshold is balanced, avoiding tilting, jamming, or asynchronous lifting caused by unilateral force. The first linear bearing and first positioning pin between the bottom of the door and the lifting threshold, and the second linear bearing and second positioning pin between the top of the door and the lifting bracket form a double precision guiding constraint, strictly limiting the movement trajectory of the lifting threshold and the lifting bracket, and ensuring the precision and controllability of the protective action. The smooth transition design of the settlement groove and the buffer slope ensures that there is no rigid collision when the nylon roller enters and exits the settlement groove, reducing stress concentration in the components and extending the service life.

[0027] In terms of user experience and practicality, the polyurethane wheels at the bottom of the lifting threshold convert sliding friction into rolling friction, which reduces component wear and ground damage, and achieves quiet operation, making it suitable for noise-sensitive medical and laboratory settings. The self-locking buckles at both ends of the traction rope enable detachable connection, and the high-strength stainless steel wire rope ensures traction reliability, simplifies maintenance procedures, and reduces maintenance costs. The ground-fixed external guide block constrains the door's trajectory through limit grooves, effectively preventing the door from tilting or shifting, and ensuring the accuracy of protection in complex installation environments.

[0028] The overall technical solution, through the coordinated operation of its various structures, not only completely solves the core pain points of existing radiation-proof electric sliding doors, but also achieves a deep integration of protective performance, operational stability, noise reduction, ease of maintenance, and environmental adaptability. It is suitable for various high-level protection scenarios such as medical radiology departments, nuclear industry laboratories, and radioactive material storage facilities, promoting the upgrading of radiation-proof door technology towards high efficiency, reliability, energy saving, and humanization, and possessing outstanding technological progress and broad market application value. Attached Figure Description

[0029] Figure 1 A front view illustrating an illustrative embodiment of a sealed, radiation-proof electric sliding door according to the present invention; Figure 2 A side view illustrating a schematic embodiment of a sealed, radiation-proof electric sliding door according to the present invention. Figure 3 A partial sectional view of the front of a schematic embodiment of a sealed protective radiation-proof electric sliding door of the present invention. Figure 4 Used to explain Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 Used to explain Figure 3 Enlarged view of a portion of point B in the middle; Figure 6 Used to explain Figure 3 Enlarged view of a portion of point C in the middle; Figure 7 A partial sectional view of the side for illustrating a schematic embodiment of a sealed, protective, radiation-proof electric sliding door of the present invention; Figure 8 Used to explain Figure 7 Enlarged view of a portion of point D; Figure 9 Used to explain Figure 7 Enlarged view of a portion of point E in the middle; Figure 10 A top view illustrating a schematic embodiment of a sealed, radiation-proof electric sliding door according to the present invention.

[0030] List of components and reference numerals: 1. Power beam; 2. Door body; 21. First linear bearing; 22. Second linear bearing; 3. Sealing protection device; 31. Lifting threshold; 32. Subrail; 321. Settling groove; 33. Suspension assembly; 331. Lifting bracket; 332. Nylon roller; 333. Traction rope; 34. Lead plate; 35. First positioning pin; 36. Second positioning pin; 37. Polyurethane wheel; 38. Self-locking buckle; 4. External guide block; 5. Ground; 6. Wall. Detailed Implementation

[0031] 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.

[0032] It should be noted that the directional terms such as left, right, up, down, front, and back in the embodiments of the present invention are only relative concepts or are based on the normal use state of the product, i.e., the direction of the product's movement, and should not be considered as limiting.

[0033] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention refer not only to changes in position, but also to movements such as rotation and rolling in which the position does not change relative to the position, but the state changes.

[0034] Finally, it should be noted that when a component is said to be "located on" or "set on" another component, it can be on the other component or may have an intervening component at the same time. When a component is said to be "connected to" another component, it can be directly connected to the other component or may have an intervening component at the same time.

[0035] like Figures 1 to 10 The airtight, radiation-proof electric sliding door shown here is designed to achieve efficient protection of the bottom gap through a mechanical linkage structure, while ensuring the stable operation of the door body 2. Its overall structure consists of a power beam 1 fixed to the wall 6, a door body 2 hanging on the power beam 1, and an airtight protective device 3. The components work together to form a complete protection system.

[0036] The airtight protective device 3, as a core functional module, includes a lifting threshold 31 mounted at the bottom of the door body 2, a secondary rail 32 fixed to the wall 6, and a suspension assembly 33. Both the door body 2 and the lifting threshold 31 have built-in lead plates 34 forming an overlapping area. Both adopt a double-layer lead plate 34 structure. The lifting threshold 31 is installed on the inside of the door body 2, and the radiation blocking effect is enhanced by the double lead plate 34 protection. The secondary rail 32 extends along the translational trajectory of the door body 2, and has a settling groove 321 adapted to the closing position of the door body 2. A buffer ramp is provided between the bottom of the settling groove 321 and the track surface of the secondary rail 32. The surface of the buffer ramp is smoothed to provide a smooth transition for the subsequent movement of components.

[0037] Two sets of suspension components 33 are symmetrically arranged along the width of the door body 2, and are respectively set at both ends of the lifting threshold 31. The two sets of suspension components 33 move synchronously. Each set of suspension components 33 includes a lifting bracket 331 installed on the top of the door body 2, a nylon roller 332 fixed to the bottom of the lifting bracket 331, and a traction rope 333 connecting the lifting bracket 331 and the lifting threshold 31. The nylon roller 332 forms a rolling engagement with the track surface of the sub-rail 32. Both ends of the traction rope 333 are provided with self-locking buckles 38. One end is detachably locked to the lifting bracket 331 through the self-locking buckle 38, and the other end is detachably locked to the lifting threshold 31 through the self-locking buckle 38. The traction rope 333 is made of high-strength stainless steel wire rope to ensure traction reliability.

[0038] To achieve precise guidance, a first linear bearing 21 is fixedly installed at the bottom of the door body 2 corresponding to the position of the lifting threshold 31. A first positioning pin 35 adapted to the first linear bearing 21 is fixedly installed at the top of the lifting threshold 31. The first positioning pin 35 and the first linear bearing 21 form a sliding guide engagement, strictly limiting the movement of the lifting threshold 31 relative to the door body 2 to only the vertical direction. A second linear bearing 22 is fixedly installed at the top of the door body 2 corresponding to the position of the lifting bracket 331. A second positioning pin 36 that cooperates with the second linear bearing 22 is fixedly installed at the bottom of the lifting bracket 331. The second positioning pin 36 and the second linear bearing 22 form a sliding engagement, ensuring that the lifting action of the lifting bracket 331 is precise and controllable.

[0039] To address the issue of the lifting threshold 31 bumping against the ground 5 due to its long movement cycle during the lifting process and inability to reach the designated height quickly, polyurethane wheels 37 are installed at both ends of the lifting threshold 31. These wheels roll against the ground 5, reducing friction and ensuring quiet operation. An external guide block 4 is fixed to the ground 5, with a limiting groove on its inner side. The bottom of the door body 2 is vertically mounted to the limiting groove, creating a sliding fit between the door body 2 and the external guide block 4. The limiting groove constrains the translational trajectory of the door body 2, preventing it from tilting or shifting.

[0040] When the door 2 is in the open state, the bottom of the lifting threshold 31 is flush with the bottom of the door 2 to avoid friction interference between the door 2 and the ground 5 during movement. When the door 2 moves along the power beam 1 towards the closed position, the nylon roller 332 rolls synchronously with the door 2 along the sub-rail 32. When it reaches the closed position, it is completely inserted into the settling groove 321. The lifting bracket 331 sinks vertically under the action of gravity. The downward traction force is applied by the traction rope 333, which drives the lifting threshold 31 to move vertically downward relative to the door 2 until the lifting threshold 31... The bottom is in contact with the ground 5, thus concealing the gap between the door body 2 and the ground 5. When the door body 2 moves in the opening direction along the power beam 1, the nylon roller 332 rolls synchronously with the door body 2 along the sub-rail 32 and gradually disengages from the settling groove 321. Under the action of the traction force of the door body 2 and its own structural reset characteristics, the lifting bracket 331 rises and resets in the vertical direction. The upward traction force is applied by the traction rope 333, which drives the lifting threshold 31 to move vertically relative to the door body 2 and return it to a state that is flush with the bottom of the door body 2, ensuring the smooth operation of the door body 2.

[0041] In a medical radiology embodiment, this embodiment is adapted to the high protection, low noise, and easy maintenance requirements of medical radiology, and fully integrates all technical features. The specific implementation is as follows: The overall structure consists of a power beam 1 fixed to the wall 6, a door 2 suspended from the power beam 1, and a sealed protective device 3. These components work together to form a complete protective system. The sealed protective device 3 includes a lifting threshold 31 mounted at the bottom of the door 2, a sub-rail 32 fixed to the wall 6, and a suspension assembly 33. Both the door 2 and the lifting threshold 31 have built-in lead plates 34 that overlap, and both use a double-layer lead plate 34 structure. The lifting threshold 31 is installed on the inside of the door 2. The double lead plates 34 are stacked to enhance the radiation blocking effect and meet the stringent protection requirements of medical radiation scenarios.

[0042] The secondary rail 32 extends along the translational trajectory of the door body 2, and a settling groove 321 adapted to the closing position of the door body 2 is provided on it. A buffer ramp is provided between the bottom of the settling groove 321 and the track surface of the secondary rail 32. The surface of the buffer ramp is smoothed to ensure a smooth transition of the component movement. Two sets of suspension components 33 are symmetrically arranged along the width of the door body 2, corresponding to the two ends of the lifting threshold 31 respectively. The two sets of suspension components 33 move synchronously. Each set of suspension components 33 includes a lifting bracket 331 installed on the top of the door body 2, a nylon roller 332 fixed to the bottom of the lifting bracket 331, and a traction rope 333 connecting the lifting bracket 331 and the lifting threshold 31. The nylon roller 332 forms a rolling engagement with the track surface of the sub-rail 32. Both ends of the traction rope 333 are provided with self-locking buckles 38. One end is detachably locked to the lifting bracket 331 through the self-locking buckle 38, and the other end is detachably locked to the lifting threshold 31 through the self-locking buckle 38. The traction rope 333 is made of high-strength stainless steel wire rope to ensure the traction reliability for long-term use.

[0043] To achieve precise guidance, a first linear bearing 21 is fixedly installed at the bottom of the door body 2 corresponding to the position of the lifting threshold 31. A first positioning pin 35 adapted to the first linear bearing 21 is fixedly installed at the top of the lifting threshold 31. The first positioning pin 35 and the first linear bearing 21 form a sliding guide engagement, strictly limiting the movement of the lifting threshold 31 relative to the door body 2 to only the vertical direction. A second linear bearing 22 is fixedly installed at the top of the door body 2 corresponding to the position of the lifting bracket 331. A second positioning pin 36 that cooperates with the second linear bearing 22 is fixedly installed at the bottom of the lifting bracket 331. The second positioning pin 36 and the second linear bearing 22 form a sliding engagement, ensuring that the lifting action of the lifting bracket 331 is precise and controllable, and avoiding operation jamming.

[0044] Polyurethane wheels 37 are installed at both ends of the bottom of the lifting threshold 31. When the polyurethane wheels 37 contact the ground 5, they form a rolling engagement, which reduces friction loss between the lifting threshold 31 and the ground 5 and achieves silent operation, meeting the noise control requirements of medical scenarios. An external guide block 4 is fixed at the ground 5. The inner side of the external guide block 4 is provided with a limiting groove. The bottom of the door body 2 is vertically assembled to the limiting groove, and the door body 2 and the external guide block 4 form a sliding engagement. The limiting groove constrains the translation trajectory of the door body 2, preventing the door body 2 from tilting or deviating and ensuring precise alignment when closing.

[0045] When the door 2 is in the open state, the bottom of the lifting threshold 31 is flush with the bottom of the door 2 to avoid friction interference between the door 2 and the ground 5 during movement. When the door 2 moves along the power beam 1 towards the closed position, the nylon roller 332 rolls synchronously with the door 2 along the subrail 32. When it reaches the closed position, it is fully inserted into the settling groove 321. The lifting bracket 331 sinks vertically under the action of gravity. The downward traction force is applied by the traction rope 333, which drives the lifting threshold 31 to move vertically downward relative to the door 2 until the bottom of the lifting threshold 31 is flush with the ground 5. When the door is closed, the gap between the door 2 and the ground 5 is completely covered. When the door 2 moves along the power beam 1 in the opening direction, the nylon roller 332 rolls synchronously with the door 2 along the sub-rail 32 and gradually disengages from the settling groove 321. Under the action of the traction force of the door 2 and its own structural reset characteristics, the lifting bracket 331 rises and resets in the vertical direction. The upward traction force is applied by the traction rope 333, which drives the lifting threshold 31 to move vertically relative to the door 2 and restore it to a state that is flush with the bottom of the door 2, ensuring that the door 2 runs smoothly and does not affect the passage of medical staff and patients.

[0046] In an embodiment of a nuclear industrial laboratory, this embodiment fully integrates all technical features to meet the requirements of high radiation dose, high frequency of start-up and shutdown, and tolerance to harsh environments in nuclear industrial laboratories. The specific implementation is as follows: The overall structure consists of a power beam 1 fixed to the wall 6, a door 2 suspended from the power beam 1, and a sealed protective device 3. All components are made of radiation-resistant and high-strength materials to ensure long-term stable operation in high-radiation environments. The sealed protective device 3, as the core functional module, includes a lifting threshold 31 mounted at the bottom of the door 2, a secondary rail 32 fixed to the wall 6, and a suspension assembly 33. Both the door 2 and the lifting threshold 31 have built-in lead plates 34, forming a large overlapping area. Both adopt a double-layer lead plate 34 structure. The lifting threshold 31 is installed inside the door 2. Through the superimposed protection of the double lead plates 34 and the complementarity of the overlapping area, effective blocking of high-dose radiation is achieved, preventing radiation leakage.

[0047] The secondary rail 32 extends along the translational trajectory of the door body 2 and is made of corrosion-resistant alloy material. It has a settling groove 321 adapted to the closing position of the door body 2. A buffer slope is provided between the bottom of the settling groove 321 and the track surface of the secondary rail 32. The surface of the buffer slope is smoothed and sprayed with a wear-resistant coating to improve wear resistance and smooth transition. Two sets of suspension components 33 are symmetrically arranged along the width of the door body 2, corresponding to the two ends of the lifting threshold 31 respectively. The two sets of suspension components 33 operate synchronously. Each set of suspension components 33 includes a lifting bracket 331 installed on the top of the door body 2, a nylon roller 332 fixed to the bottom of the lifting bracket 331, and a traction rope 333 connecting the lifting bracket 331 and the lifting threshold 31. The nylon roller 332 is made of high-strength wear-resistant material and forms a stable rolling fit with the track surface of the sub-rail 32. Both ends of the traction rope 333 are provided with self-locking buckles 38. One end is detachably locked to the lifting bracket 331 through the self-locking buckle 38, and the other end is detachably locked to the lifting threshold 31 through the self-locking buckle 38. The traction rope 333 is made of high-strength stainless steel wire rope to ensure that it does not break or deform under high-frequency traction action.

[0048] To achieve precise guidance and stable operation, a first linear bearing 21 is fixedly installed at the bottom of the door body 2 corresponding to the position of the lifting threshold 31. A first positioning pin 35 adapted to the first linear bearing 21 is fixedly installed at the top of the lifting threshold 31. The first positioning pin 35 and the first linear bearing 21 form a sliding guide engagement, strictly limiting the movement of the lifting threshold 31 relative to the door body 2 to only the vertical direction, avoiding protection failure caused by horizontal deviation. A second linear bearing 22 is fixedly installed at the top of the door body 2 corresponding to the position of the lifting bracket 331. A second positioning pin 36 that cooperates with the second linear bearing 22 is fixedly installed at the bottom of the lifting bracket 331. The second positioning pin 36 and the second linear bearing 22 form a sliding engagement, ensuring that the lifting action of the lifting bracket 331 is precise and controllable, and adapting to the use requirements of high-frequency opening and closing.

[0049] Polyurethane wheels 37 are installed at both ends of the bottom of the lifting threshold 31. These high-hardness, wear-resistant wheels form a rolling contact with the ground 5, reducing friction loss between the lifting threshold 31 and the ground 5, extending service life, and enabling quiet operation, thus improving the laboratory working environment. The elastic properties of the polyurethane wheels 37 absorb the impact from uneven ground 5, ensuring the lifting threshold 31 smoothly conforms to the ground 5. An external guide block 4 is fixed to the ground 5. The external guide block 4 is made of heavy-duty alloy material and has a limiting groove on its inner side. The bottom of the door body 2 is vertically mounted to the limiting groove, forming a sliding contact between the door body 2 and the external guide block 4. The limiting groove effectively constrains the translational trajectory of the door body 2, preventing tilting or deviation during high-frequency operation and ensuring alignment accuracy when closing.

[0050] When the door 2 is in the open state, the bottom of the lifting threshold 31 is flush with the bottom of the door 2 to avoid frictional interference between the door 2 and the ground 5 and the experimental equipment during the movement. When the door 2 moves along the power beam 1 towards the closed position, the nylon roller 332 rolls synchronously with the door 2 along the sub-rail 32. When it reaches the closed position, it is completely inserted into the settling groove 321. The lifting bracket 331 sinks vertically under the action of gravity. The downward traction force is applied by the traction rope 333, which drives the lifting threshold 31 to move vertically downward relative to the door 2 until the bottom of the lifting threshold 31 is in contact with the ground 5. The gap between the door 2 and the ground 5 is completely covered, forming a sealed protective space. When the door 2 moves along the power beam 1 in the opening direction, the nylon roller 332 rolls synchronously with the door 2 along the sub-rail 32 and gradually disengages from the settlement groove 321. Under the action of the traction force of the door 2 and its own structural reset characteristics, the lifting bracket 331 rises and resets in the vertical direction. The upward traction force is applied by the traction rope 333, which drives the lifting threshold 31 to move vertically relative to the door 2 and return to the state of being flush with the bottom of the door 2, ensuring the smooth operation of the door 2 and meeting the high-frequency passage requirements of the laboratory.

[0051] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A sealed, radiation-proof electric sliding door, characterized in that, It includes a power beam fixed to the wall, a door hanging on the power beam, and a sealed protective device; The airtight protective device includes a lifting threshold assembled at the bottom of the door, a sub-rail fixed to the wall, and a suspension assembly. The lifting threshold and the door have an overlapping area and both are equipped with lead plates. The subrail is provided with a settling groove corresponding to the closing position. The suspension assembly includes a lifting bracket installed on the top of the door, nylon rollers fixed to the lifting bracket, and a traction rope connecting the lifting bracket and the lifting threshold. When the door is closed, the nylon roller moves along the sub-rail to the settling groove, the lifting bracket sinks and pulls the lifting threshold relative to the door body downwards via the traction rope, so as to partially cover the gap between the door body and the ground; when the door is opened, the nylon roller disengages from the settling groove, the lifting bracket resets and pulls the lifting threshold upwards via the traction rope, so as to avoid friction interference with the ground.

2. The airtight, radiation-proof electric sliding door according to claim 1, characterized in that, Two sets of suspension components are symmetrically arranged along the width of the door, and are respectively set at both ends of the lifting threshold.

3. A sealed, protective, radiation-proof electric sliding door according to claim 2, characterized in that, When the door is in the open state, the bottom of the lifting threshold is flush with the bottom of the door. The depth of the settling groove is not less than the distance from the lowest point of the lifting threshold to the ground.

4. A sealed, protective, radiation-proof electric sliding door according to claim 1, characterized in that, Both the door body and the lifting threshold are made of double-layer lead plates, and the lifting threshold is installed inside the door body.

5. A sealed, radiation-proof electric sliding door according to claim 1, characterized in that, A first linear bearing is fixedly installed at the bottom of the door body corresponding to the position of the lifting threshold, and a first positioning pin adapted to the first linear bearing is fixedly installed at the top of the lifting threshold. The first positioning pin and the first linear bearing form a sliding guide engagement.

6. A sealed, protective, radiation-proof electric sliding door according to claim 1, characterized in that, A second linear bearing is fixedly installed at the top of the door body corresponding to the position of the lifting bracket, and a second positioning pin is fixedly installed at the bottom of the lifting bracket to cooperate with the second linear bearing. The second positioning pin and the second linear bearing form a sliding fit.

7. A sealed, protective, radiation-proof electric sliding door according to claim 1, characterized in that, Polyurethane wheels are installed at the bottom of both ends of the lifting threshold.

8. A sealed, radiation-proof electric sliding door according to claim 1, characterized in that, Both ends of the traction rope are equipped with self-locking buckles. One end is detachably locked to the lifting bracket via the self-locking buckle, and the other end is detachably locked to the lifting threshold via the self-locking buckle.

9. A sealed, radiation-proof electric sliding door according to claim 1, characterized in that, An external guide block is fixed to the ground, and a limiting groove is provided on the inner side of the external guide block. The bottom of the door is vertically assembled to the limiting groove, and the door and the external guide block slide together.

10. A sealed, radiation-proof electric sliding door according to claim 1, characterized in that, A buffer ramp is provided between the bottom of the settling groove and the surface of the secondary rail.

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