Shielding protective door with automatic lifting threshold
The shielding door with automatic lifting threshold uses the opening and closing of the door leaf to control the raising and lowering of the threshold, which solves the radiation leakage problem of the radiation shielding door, achieves safe and convenient radiation protection, and reduces manpower and resource costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINAN DAHUA YITE ENVIRONMENTAL PROTECTION ENG
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-15
AI Technical Summary
Existing radiation protection doors pose a risk of radiation leakage at the threshold and require manual control of the lifting mechanism, leading to safety hazards and resource waste.
Design an automatic lifting threshold shielding door. The door leaf opening and closing controls the lifting of the threshold. Lead plates are used to block radiation. The automatic lifting and lowering is achieved by combining a lifting device and a control device to prevent radiation leakage.
It achieves a threshold flush with the ground when the door is open for easy passage, and automatically raises to block rays when the door is closed, reducing manpower requirements, reducing costs, and its stable structure makes it easy to maintain.
Smart Images
Figure CN224244753U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of radiation protection door technology, specifically relating to a shielding protection door with an automatic lifting threshold. Background Technology
[0002] X-ray shielding doors are crucial in modern medical equipment rooms and other important entrances. They provide radiation protection, shielding against high-radiation facilities and protecting surrounding people from radiation exposure. Lead is the primary material used in their construction, and these doors are often referred to as lead doors. The shielding material is high-purity lead sheet, and the bonding process is extremely rigorous, resulting in doors that are radiation-free, easy to use, aesthetically pleasing, and offer excellent protection. Lead doors are mainly used at entrances and exits where radiation needs to be blocked, primarily in hospitals, machine rooms, and mining areas, including CT rooms, X-ray rooms, operating rooms, and flaw detection rooms in hospitals.
[0003] Currently, conventional radiation protection doors mainly consist of a door leaf and a door frame. A large gap exists between the bottom of the door leaf and the frame, allowing radiation to easily leak out and posing a risk of radiation leakage. To address this issue, existing side-opening doors often incorporate a lifting mechanism within the threshold to achieve a seal, prevent radiation leakage, and reduce the risk of radiation leakage. Examples include a movable threshold protective airtight door disclosed in patent 201821090964X and a radiation-proof civil defense door disclosed in patent 2020221779488. While these solutions address the radiation leakage problem, both require manual control of the lifting mechanism. The lack of automatic operation can lead to forgetfulness and potential radiation leakage or passage obstruction. Furthermore, in emergencies, this could result in serious safety incidents. Manual operation also places a burden on staff, and hiring dedicated personnel for control could waste resources such as medical supplies and increase costs. Utility Model Content
[0004] To address the aforementioned issues, this invention proposes an automatic lifting threshold shielding door. This door automatically controls the raising and lowering of the threshold through the opening and closing of the door leaf, blocking radiation and providing excellent radiation protection performance. It requires no manual operation, reducing costs, and the device is easy to install, disassemble, and maintain.
[0005] The technical solution of this utility model is as follows: A shielding and protective door with an automatic lifting threshold includes a door frame and a door leaf. A threshold is set in a groove at the bottom of the door frame, and the bottom of the door frame is flush with the ground. A lead plate is set inside the threshold, and a lifting device is set inside the threshold. The lifting device is connected to the groove at the bottom of the door frame. A control device is set inside the side of the door frame. The lifting device is connected to the control device through a pull rod. The control device includes a moving part, an elastic part, and a contact rod. One end of the moving part passes through a reserved opening at the bottom of the door frame and is connected to the pull rod. The other end of the moving part is connected to the contact rod. The touch bar extends through the side of the door frame and is located on the side of the door frame near the connection between the door frame and the door leaf. The side of the moving part away from the touch bar is connected to the elastic component, which is connected to the bottom of the door frame. The height of the threshold is greater than the gap between the bottom of the door frame and the door leaf, and the depth of the groove at the bottom of the door frame is greater than or equal to the height of the threshold. The touch bar is located on the side of the door frame near the opening side, and the threshold is located on the bottom of the door frame near the non-opening side. When the door leaf is open, the top of the threshold is flush with the top surface of the bottom of the threshold. When the door leaf is closed, the threshold rises to cover the gap between the bottom of the door frame and the door leaf.
[0006] Preferably, the lifting device includes a plate, a rotating shaft, a central rotating shaft, and cross support rods. The upper and lower plates are arranged in parallel, and the lower plate is connected to the groove at the bottom of the door frame. Cross support rods are arranged between the two plates, and cross support rods are arranged on both sides of the two plates respectively. The intersection of the two cross support rods is connected by the central rotating shaft, and the ends of the two cross support rods are movably connected to the plate through the rotating shaft. The two ends of the rotating shaft distributed on one side of the central rotating shaft are respectively arranged in guide grooves. The guide grooves are arranged on the side wall of the plate, and the rotating shaft is connected to one end of the pulling rod, which is arranged in the groove at the bottom of the door frame.
[0007] More preferably, at least two central pivots are provided between the two plates; pivots near adjacent central pivots are connected by transmission rods in guide grooves, and pivots connected by transmission rods are provided in guide grooves on the side wall of the lower plate; by providing a structure with at least two central pivots and cross support rods, it is beneficial to the stability of lifting and lowering and long-term operation. Even if one set of structures has a problem, it can be removed or a new structure can be installed after removal to allow the threshold to lift and lower normally.
[0008] More preferably, the guide groove is located on the side of the central rotating shaft away from the moving part.
[0009] More preferably, the ends of the pivot and the central pivot are provided with clips, and the length of the threshold is less than or equal to the minimum distance between the two sides of the door frame. When the distance is equal, it is more conducive to blocking and shielding rays. When the threshold length is slightly smaller, it is more conducive to installation and lifting operation. Lead plates are provided on both inner walls of the threshold. The threshold is located on the non-opening side of the bottom of the door frame, and the touch connecting rod is located on the opening side of the door frame.
[0010] Preferably, the elastic component includes a spring, a fixing member, and a guide rod; the guide rod passes through the fixing member and the spring to connect to the movable member, the fixing member is connected to the bottom of the door frame, and there are gaps between the movable member and the side and bottom of the door frame to facilitate the movement of the movable member; the fixing member and the guide rod mainly serve to fix and guide the spring.
[0011] More preferably, the elastic component further includes a thickened part, a bearing flange connecting seat, and a supporting guide. The bearing flange connecting seat is mounted on the fixed part, the guide rod is mounted in the bearing flange connecting seat, and the thickened part is positioned between the guide rod and the moving part. The thickened part is connected to both the guide rod and the moving part. The spring is mounted on the guide rod between the bearing flange connecting seat and the thickened part. At least two guide rods are provided. A supporting guide is positioned between the moving part and the side of the door frame, and a bushing is mounted on the supporting guide. The touch rod is positioned inside the bushing, and the supporting guide is connected to the bottom of the door frame. The thickened part facilitates force transmission and structural stability. The bearing flange connecting seat facilitates the movement of the guide rod and also provides support. The supporting guide and bushing are mainly provided to facilitate the movement of the touch rod, while also serving as support and guidance.
[0012] Preferably, a settling housing is installed in the groove at the bottom of the door frame, and a threshold and lifting device are installed in the settling housing. The bottom of the settling housing is connected to the lower plate and the bottom of the door frame. The height of the settling housing is the same as the depth of the groove. One end of the pulling rod is set in the settling housing, and the other end is set in the groove at the bottom of the door frame. The settling housing allows debris to fall into the gap for easy removal. It also facilitates timely diagnosis and repair if problems occur during the raising and lowering of the threshold.
[0013] More preferably, the threshold is a groove-shaped structure, with the upper plate connected to the threshold, the length of the plate being less than the length of the threshold, and there is a gap between the threshold and the settling shell; a lead plate is provided on the inner side wall of the threshold, and there is a gap between the lead plate and the lifting device.
[0014] More preferably, extension blocks are provided at both ends of the lower plate, and stabilizing members are provided on the extension blocks. The stabilizing members, extension blocks and settling shell are connected by screws. The extension blocks and stabilizing members serve to stabilize the plate and prevent deformation, while also facilitating the connection between the plate and the settling shell.
[0015] This utility model employs an automatic lifting threshold shielding door. A lead plate is installed inside the threshold to block and shield radiation. Specifically, when the door is closed, pressing a contact rod moves it away from the door, compressing a spring. The spring generates elastic force, causing the contact rod to move a movable component and a connecting rod. This moves the pivot from one end of the guide groove away from the movable component to the other, increasing the distance between the upper and lower panels and raising the threshold. This blocks the gap between the bottom of the door frame and the door, thus achieving the function of blocking and shielding radiation. When the door is opened, the door no longer presses the contact rod. The movable component is subjected to both the elastic force of the spring and the pulling force of the connecting rod. This pulling force is generated by the weight of the threshold, lead plate, and upper panel, causing the connecting rod to move away from the movable component. The combined force of the pulling and elastic forces causes the movable component to move the contact rod towards the door until the contact rod returns to its original state. When the spring returns to its original state, the pivot also returns to its original position from the other end of the guide groove. The distance between the upper and lower plates decreases, and the threshold drops. At this time, the top of the threshold is flush with the top surface of the bottom of the door frame. The spring not only plays the above role but also acts as a buffer, making the pivot move more smoothly from one end of the guide groove to the other, preventing hard contact and wear between the pivot and the guide groove. When the touch rod returns to its original state, the spring goes from being compressed to returning to its natural state and then being stretched, which also acts as a buffer for the touch rod. This further buffers the pivot's return from one end of the guide groove to its original position, avoiding hard contact and reducing wear. Similarly, when the touch rod is compressed, the pivot moves from one end of the guide groove to the other, and the spring also acts as a buffer. The opening and closing of the door automatically controls the raising and lowering of the threshold. When the threshold is at its lowest point, the top is flush with the ground, making it convenient for people, vehicles, and goods to pass through. When the threshold is raised, it can block and shield the rays that spill out between the door and the bottom of the door frame, preventing radiation leakage.
[0016] This utility model provides an automatic lifting threshold shielding door. Through the cooperation of a control device and a lifting device, the threshold can be automatically raised and lowered by opening and closing the door leaf. When the door leaf is open, the threshold is flush with the ground, facilitating passage. When the door leaf is closed, the threshold rises to block and shield radiation, preventing radiation leakage. The integrated structure of the lifting device, control device, and other devices in this protective door is stable and not prone to failure. If a failure does occur, the problem is easy to detect, and disassembly, repair, and installation are convenient. The automatic raising and lowering of the threshold does not require manual operation, reducing manpower, material resources, and costs. Attached Figure Description
[0017] Figure 1 This is a structural schematic diagram of the door frame of this utility model;
[0018] Figure 2This is a schematic diagram of the control device and lifting device of this utility model;
[0019] Figure 3 for Figure 2 A schematic diagram of the front structure;
[0020] Figure 4 This is a schematic diagram of the cross support rod of this utility model;
[0021] Figure 5 This is a schematic diagram of the settling shell and pulling linkage of this utility model;
[0022] Figure 6 This is a schematic diagram of the settlement shell and threshold of this utility model;
[0023] Figure 7 for Figure 1 A schematic diagram of the horizontal cross-sectional structure;
[0024] Figure 8 This is a top view of the bottom of the door frame of this utility model;
[0025] In the diagram, 1 is a plate, 1-1 is the upper plate, 1-2 is the lower plate, 2 is a pivot, 3 is an extension block, 4 is a guide groove, 5 is a cross support rod, 6 is a clamp, 7 is a pulling link, 8 is a touch rod, 9 is a support guide, 10 is a moving part, 11 is a spring, 12 is a bearing flange connecting seat, 13 is a fixing part, 14 is a guide rod, 15 is a thickened part, 16 is a transmission rod, 17 is a groove, 18 is a central pivot, 19 is a bushing, 20 is a settling shell, 21 is a threshold, 22 is a lead plate, 23 is a door frame, 23-1 is the side of the door frame, 23-2 is the bottom of the door frame, 24 is a connector, 25 is the non-opening side, 26 is the opening side, 27 is a stabilizing part, and 28 is a reserved opening. Detailed Implementation
[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.
[0027] like Figure 1-8As shown, an automatic lifting threshold shielding door includes a door frame 23 and a door leaf. The side of the door frame 23 and the door leaf are connected by a connector 24, which is located near the touch rod 8. The connector 24 can be located on the bottom 23-2 of the door frame. This shielding door is a side-opening door. A threshold 21 is provided in the groove 17 of the bottom 23-2 of the door frame. The top surface of the bottom 23-2 of the door frame is flush with the ground. A lead plate 22 is provided inside the threshold 21. A lifting device is provided in the threshold 21. The lifting device is connected to the bottom of the groove 17 of the bottom 23-2 of the door frame. The door frame side 23-1 is equipped with a control device. The lifting device is connected to the control device via a pull rod 7. The control device includes a moving part 10, an elastic component, and a touch rod 8. One end of the moving part 10 passes through a pre-reserved opening 28 at the bottom 23-2 of the door frame and is connected to the pull rod 7 via screws or other existing connection methods. The moving part 10 can move horizontally left and right in the pre-reserved opening 28, thereby raising and lowering the threshold. The other end of the moving part 10 is connected to the touch rod 8. The moving part 10 and the touch rod 8 can be connected by snap-fit or threaded connection. Other connection methods such as splicing, welding, and bonding are used. The touch rod 8 passes through the side 23-1 of the door frame (the touch rod 8 passes through the side 23-1 of the door frame and contacts the door leaf). The touch rod 8 is located on the side 23-1 of the door frame near the connection between the door frame 23 and the door leaf. The side of the moving part 10 away from the touch rod 8 is connected to the elastic component, and the elastic component is connected to the bottom 23-2 of the door frame. The height of the threshold 21 is greater than the gap between the bottom 23-2 of the door frame and the door leaf. The depth of the groove 17 at the bottom 23-2 of the door frame is greater than or equal to the height of the threshold 21. The depth of 7 is equal to the distance from the top of the threshold 21 (the state of the threshold 21 when the door is open) to the bottom of the groove 17. The height of the threshold 21 is set so that when the threshold 21 is raised, it can effectively block and shield the rays between the door frame 23 and the door. After the threshold 21 is lowered, the threshold 21 is set in the groove 17 and the threshold 21 is flush with the bottom 23-2 of the door frame for easy passage. The touch bar 8 is set on the side 23-1 of the door frame near the opening side 23, and the threshold 21 is set on the bottom 23-2 of the door frame near the non-opening side 25.
[0028] In another embodiment, the lifting device includes a plate 1, a rotating shaft 2, a central rotating shaft 18, and cross support rods 5. The upper and lower plates 1 are arranged in parallel, and the lower plate 1-2 is connected to the groove 17 of the bottom 23-2 of the door frame by screws. Cross support rods 5 are arranged between the two plates 1, and cross support rods 5 are arranged on both sides of the two plates 1. The intersection of the two cross support rods 5 is connected by the central rotating shaft 18. The two ends of the central rotating shaft 18 pass through the intersection of the cross support rods 4, and the ends are provided with clips 6. The ends of the two cross support rods 5 are connected to the rotating shaft 2 by the central rotating shaft 2. The plate 1 is movably connected. The two ends of the rotating shaft 2 pass through the ends of the cross support rod 5 and the side wall of the plate 1. The ends of the shaft 2 are provided with clips 6 to prevent the rotating shaft 2, the cross support rod 5 and the plate 1 from being disconnected. The two ends of the rotating shaft 2 distributed on one side of the central rotating shaft 18 are respectively set in the guide groove 4. The guide groove 4 is set on the side wall of the plate 1, and the rotating shaft 2 (i.e. the rotating shaft in the guide groove 4) is connected to one end of the pulling link 7. The rotating shaft 2 passes through the pulling link 7 to achieve a movable connection. The pulling link 7 is set in the groove 17 at the bottom 23-2 of the door frame.
[0029] In another embodiment, at least two central pivots 18 are provided between the two plates 1, each central pivot 18 is equipped with a set of cross support rods 5 and four pivots 2; pivots 2 near adjacent central pivots 18 are connected in guide grooves 4 by transmission rods 16, and the pivots 2 connected by transmission rods 16 are set in guide grooves 4 on the side wall of the lower plate 1-2, and the pivot 2 is also connected to a pulling link 7, that is, one end of the pulling link 7 and one end of the transmission rod 16 are both connected to the same pivot 2, and the guide groove 4 is set on the side of the central pivot 18 away from the moving part 10; even if one of the structures has a problem, the threshold 21 can be raised and lowered normally by removing it or removing it and installing a new structure.
[0030] In another embodiment, the elastic component includes a spring 11, a fixing member 13, and a guide rod 14. The guide rod 14 passes through the fixing member 13 and the spring 11 and connects to the movable member 10. The fixing member 13 connects to the bottom 23-2 of the door frame and can be connected by welding, threaded connection, screws, etc. The movable member 10 has gaps with both the side 23-1 and the bottom 23-2 of the door frame to facilitate the movement of the movable member 10. The lower part of the movable member 10 passes through the reserved openings 28 of the side 23-1 and the bottom 23-2 of the door frame and is placed in the groove 17. The upper part of the movable member 10 is set in the side 23-1 of the door frame, and the lower part of the movable member 10 is set in the groove 17 of the bottom 23-2 of the door frame, which facilitates the connection of the movable member 10 with the pulling rod 7 and facilitates the movement of the movable rod in the reserved opening 28. The elastic component also includes a thickened member 15, a bearing flange connecting seat 12, and a support guide member 9. The bearing flange connecting seat 12 is set on the fixing member 13, and the guide rod 14 is set on the bearing flange connecting seat 9. In seat 12, a thickened part 15 is provided between guide rod 14 and moving part 10. The thickened part 15 is welded to guide rod 14 and moving part 10, or it can be connected by other means. Spring 11 is set on guide rod 14 between bearing flange seat and thickened part 15. At least two guide rods 14 are provided. A supporting guide 9 is provided between moving part 10 and side 23-1 of door frame 23. A bushing 19 is set on the supporting guide 9. Touch rod 8 is set in bushing 19. Supporting guide 9 is welded to bottom 23-2 of door frame or connected by screws, snap-fit, adhesive or other means. Fixing part 13 and guide rod 14 mainly serve to fix and guide spring 11. Thickened part 15 facilitates force transmission and structural stability. Bearing flange connecting seat 12 facilitates the movement of guide rod 14 and provides support. The supporting guide 9 and bushing 19 are mainly provided to facilitate the movement of touch rod 8, and at the same time serve to support and guide.
[0031] In another embodiment, a recessed housing 20 is provided in the groove 17 of the bottom 23-2 of the door frame. A threshold 21 and a lifting device are provided in the recessed housing 20. The bottom of the recessed housing 20 is connected to the lower panel 1-2 by screws, and the recessed housing 20 is also connected to the bottom 23-2 of the door frame by screws. The height of the recessed housing 20 is the same as the depth of the groove 17, so that the top of the recessed housing 20 is flush with the top surface of the bottom 23-2 of the door frame (i.e., flush with the ground), facilitating passage. However, sometimes, for ease of installation of the recessed housing 20... The height of the settling housing 20 is slightly greater than the depth of the groove 17, so that the top of the settling housing 20 is slightly higher than the top surface of the bottom 23-2 of the door frame (i.e., slightly higher than the ground). Since the protrusion is very small, it does not affect normal passage. One end of the pulling rod 7 is set in the settling housing 20, and the other end is set in the groove 17 of the bottom 23-2 of the door frame. The setting of the settling housing 20 allows debris to fall into the gap and be easily removed. It also makes it easier to judge and repair problems in time if they occur during the raising and lowering of the threshold 21.
[0032] In another embodiment, the threshold 21 has a groove-like structure (with cavities on the front, rear sides, and top). The upper plate 1-1 is connected to the threshold 21 with screws. The length of plate 1 is less than the length of threshold 21. There is a gap between the threshold 21 and the settling shell 20 to facilitate the raising and lowering of the threshold 21 and reduce friction. A lead plate 22 is installed on the inner side wall of the threshold 21. The lead plate 22 is glued to the side wall of the threshold 21. There is a gap between the lead plate 22 and the lifting device. The installation of the lead plate 22 does not affect the movement of the cross support rod 15 or the lifting device. The height of the lead plate 22 is greater than or equal to the gap between the bottom of the door frame 23-2 and the door leaf, and the height of the lead plate 22 is less than or equal to the height of the threshold 21. Extension blocks 3 are respectively set at both ends of the lower plate 1-2. The lower plate 1-2 and the extension blocks 3 are connected by means of integral connection, bonding or welding. A stabilizing member 27 is set on the extension block 3. The stabilizing member 27, the extension block 3 and the sinking shell 20 are connected by screws. The setting of the extension block 3 and the stabilizing member 27 plays the role of stabilizing the plate 1 and preventing deformation. At the same time, it is convenient to connect the plate 1 and the sinking shell 20.
[0033] In another embodiment, the ends of the pivot 2 and the central pivot 18 are provided with locking pieces 6. The locking pieces 6 are threaded or engaged with the pivot 2 and the central pivot 18 to prevent the pivot 2 or the central pivot 18 from falling off. The length of the threshold 21 is less than or equal to the minimum distance between the two sides of the door frame 23 (i.e., the distance between the non-opening sides of the two door frame sides 23-1). When the distance is equal, it is more conducive to blocking and shielding rays. When the length of the threshold 21 is slightly smaller, it is more conducive to installation and lifting operation. Lead plates 22 are provided inside the two side walls of the threshold 21 to facilitate the shielding of rays. There are gaps between the moving part 10 and the side and bottom of the door frame 23 to facilitate the movement of the moving part 10. The threshold 21 is set at the non-opening side 25 position of the bottom 23-2 of the door frame, the touch rod 8 is set at the opening side 26 position of the side 23-1 of the door frame, and the door leaf is correspondingly set above the opening side 26 of the bottom 23-2 of the door frame.
[0034] In another embodiment, the door frame side 23-1 is connected to the door frame bottom 23-2, which can be done by welding or other existing technologies.
[0035] This utility model employs an automatic lifting threshold shielding door. A lead plate 22 is installed inside the threshold 21 to shield against radiation. Specifically, when the door is closed, pressing the contact rod 8 causes it to move away from the door, thus compressing the spring 11. The spring 11 generates elastic force, causing the contact rod 8 to move the moving part 10 and pull the connecting rod 7. This moves the rotating shaft 2 from one end of the guide groove 4 away from the moving part 10 to the other end of the guide groove 4, increasing the distance between the upper and lower plates 1, raising the threshold 21, and blocking the door. The gap between the bottom 23-2 of the frame and the door leaf serves to block and shield rays. When the door leaf is opened, it no longer presses against the touch rod 8. The moving part 10 is subjected to the elastic force of the spring 11 and the pulling force of the pulling link 7. This pulling force is generated by the weight of the threshold 21, the lead plate 22, and the upper plate 1-1, causing the pulling link 7 to move away from the moving part 10. The action of the pulling force and the elastic force causes the moving part 10 to move the touch rod 8 towards the door leaf until the touch rod 8 returns to its original position. When the spring returns to its original state, the pivot 2 also returns to its original position from the other end of the guide groove 4. The distance between the upper and lower plates 1 decreases, and the threshold 21 drops. At this time, the top of the threshold 21 is flush with the top surface of the bottom 23-2 of the door frame. The spring 11 not only plays the above role, but also acts as a buffer, making the pivot 2 move more smoothly from one end of the guide groove 4 to the other, preventing hard contact and wear between the pivot 2 and the guide groove 4. When the touch rod 8 returns to its original state, the spring 11 goes from being compressed to returning to its natural state, and then to being stretched, which affects the touch rod 8. It also acts as a buffer, thus buffering the return of the pivot 2 from one end of the guide groove 4 to its original position, avoiding hard contact and reducing wear. Similarly, when the touch rod 8 is squeezed, the pivot 2 moves from one end of the guide groove 4 to the other end, and the spring 11 also acts as a buffer. Through the opening and closing of the door leaf, the raising and lowering of the threshold 21 is automatically controlled. When the threshold 21 is at its lowest point, the top is flush with the ground, making it convenient for people, vehicles and objects to pass. After the threshold 21 is raised, the threshold 21 can block and shield the rays that spill out between the door leaf and the bottom 23-2 of the door frame, preventing radiation spillage.
[0036] This utility model provides an automatic lifting threshold shielding door. Through the cooperation of a control device and a lifting device, the threshold can be automatically raised and lowered by opening and closing the door leaf. When the door leaf is open, the threshold is flush with the ground, facilitating passage. When the door leaf is closed, the threshold rises to block and shield radiation, preventing radiation leakage. The integrated structure of the lifting device, control device, and other devices in this protective door is stable and not prone to failure. If a failure does occur, the problem is easy to detect, and disassembly, repair, and installation are convenient. The automatic raising and lowering of the threshold does not require manual operation, reducing manpower, material resources, and costs.
[0037] The above description is merely an embodiment of this application and is not intended to limit the scope of 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 principles of this application should be included within the scope of the claims of this application.
Claims
1. A shielded door with an automatic lifting threshold, comprising a door frame (23) and a door leaf, wherein a threshold (21) is provided in a groove (17) at the bottom (23-2) of the door frame, and the bottom (23-2) of the door frame is flush with the ground, characterized in that: A lead plate (22) and a lifting device are installed inside the threshold (21). The lifting device is connected to the groove (17) at the bottom of the door frame (23-2). A control device is installed inside the side of the door frame (23-1). The lifting device is connected to the control device through a pulling rod (7). The control device includes a moving part (10), an elastic component, and a touch rod (8). One end of the moving part (10) passes through the reserved opening (28) at the bottom of the door frame (23-2) and is connected to the pulling rod (7). The other end of the moving part (10) is connected to the touch rod (8). The touch rod (8) passes through the side of the door frame (23-1). The door frame side (23-1) is located near the connection between the door frame (23) and the door leaf; the movable part (10) is connected to the elastic part on the side away from the touch bar (8), and the elastic part is connected to the bottom of the door frame (23-2); the height of the threshold (21) is greater than the gap between the bottom of the door frame (23-2) and the door leaf, and the depth of the groove (17) at the bottom of the door frame (23-2) is greater than or equal to the height of the threshold (21); the touch bar (8) is located on the door frame side (23-1) near the opening side (26), and the threshold (21) is located on the bottom of the door frame (23-2) near the non-opening side (25).
2. The shielding and protective door with an automatic lifting threshold according to claim 1, characterized in that: The lifting device includes a plate (1), a rotating shaft (2), a central rotating shaft (18), and cross support rods (5). The upper and lower plates (1) are arranged in parallel. The lower plate (1-2) is connected to the groove (17) at the bottom of the door frame (23-2). Cross support rods (5) are arranged between the two plates (1). Cross support rods (5) are arranged on both sides of the two plates (1). The intersection of the two cross support rods (5) is connected through the central rotating shaft (18). The ends of the two cross support rods (5) are movably connected to the plate (1) through the rotating shaft (2). The two ends of the rotating shaft (2) distributed on one side of the central rotating shaft (18) are respectively arranged in the guide groove (4). The guide groove (4) is arranged on the side wall of the plate (1). The rotating shaft (2) is connected to one end of the pulling rod (7). The pulling rod (7) is arranged in the groove (17) at the bottom of the door frame (23-2).
3. The shielding and protective door with an automatic lifting threshold according to claim 2, characterized in that: At least two central rotating shafts (18) are provided between the two plates (1); the rotating shafts (2) near the adjacent central rotating shafts (18) are connected in the guide grooves (4) by transmission rods (16), and the rotating shafts (2) connected by the transmission rods (16) are provided in the guide grooves (4) on the side wall of the lower plate (1-2).
4. A shielding and protective door with an automatic lifting threshold as described in claim 2 or 3, characterized in that: The guide groove (4) is located on the side of the central rotating shaft (18) away from the moving part (10).
5. A shielding and protective door with an automatic lifting threshold as described in claim 2 or 3, characterized in that: Both the ends of the pivot (2) and the central pivot (18) are provided with clips (6), and the length of the threshold (21) is less than or equal to the minimum distance between the two sides of the door frame (23).
6. The shielding and protective door with an automatic lifting threshold according to claim 1, characterized in that: The elastic component includes a spring (11), a fixing member (13), and a guide rod (14); the guide rod (14) passes through the fixing member (13) and the spring (11) and connects to the moving member (10); the fixing member (13) is connected to the bottom of the door frame (23-2); and there are gaps between the moving member (10) and the side of the door frame (23-1) and the bottom of the door frame (23-2).
7. A shielding and protective door with an automatic lifting threshold as described in claim 6, characterized in that: The elastic component also includes a thickened part (15), a bearing flange connecting seat (12), and a support guide (9). The bearing flange connecting seat (12) is set on the fixed part (13), and the guide rod (14) is set in the bearing flange connecting seat (12). The thickened part (15) is set between the guide rod (14) and the moving part (10). The thickened part (15) is connected to the guide rod (14) and the moving part (10). The spring (11) is set on the guide rod (14) between the bearing flange connecting seat (12) and the thickened part (15). At least two guide rods (14) are provided. The support guide (9) is set between the moving part (10) and the side of the door frame (23-1). The bushing (19) is set on the support guide (9), and the touch rod (8) is set inside the bushing (19). The support guide (9) is connected to the bottom of the door frame 23-2.
8. A shielding and protective door with an automatic lifting threshold as described in claim 1, characterized in that: A settling housing (20) is provided in the groove (17) at the bottom (23-2) of the door frame. A threshold (21) and a lifting device are provided in the settling housing (20). The bottom of the settling housing (20) is connected to the lower plate (1-2). The settling housing (20) is connected to the bottom (23-2) of the door frame. The height of the settling housing (20) is the same as the depth of the groove (17). One end of the pulling rod (7) is set in the settling housing (20), and the other end is set in the groove (17) at the bottom (23-2) of the door frame.
9. A shielding and protective door with an automatic lifting threshold as described in claim 8, characterized in that: The threshold (21) is a groove structure. The upper plate (1-1) is connected to the threshold (21). The length of the plate (1) is less than the length of the threshold (21). There is a gap between the threshold (21) and the settling shell (20). A lead plate (22) is provided on the inner side wall of the threshold (21). There is a gap between the lead plate (22) and the lifting device.
10. A shielding and protective door with an automatic lifting threshold as described in claim 8 or 9, characterized in that: The lower plate (1-2) is provided with extension blocks (3) at both ends, and a stabilizing member (27) is provided on the extension block (3). The stabilizing member (27), the extension block (3) and the sinking shell (20) are connected by screws.