Modular replaceable sealing assembly's single-leaf threshold civil defense door structure
Patent Information
- Application Number
- CN202522762210.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-12-26
AI Technical Summary
[0004]有鉴于此，本实用新型的目的在于提出模块化可替换密封组件的单扇活门槛人防门结构，以解决现有技术中在密封圈磨损后无法实现快速拆装和模块化替换，维护效率低，结构不利于长期使用后的密封保持与维修的问题
1.该模块化可替换密封组件的单扇活门槛人防门结构，通过设置握持套、螺纹柱、螺纹槽、引导槽及限位板之间的联动结构，使密封组件能够在无需工具的情况下完成快速拆装，操作者仅需转动握持套即可解除对移动板的限位，随后通过抬动握把实现限位板自动缩回滑腔内，从而释放安装框，使密封圈能够整体拆卸，该结构彻底避免了传统螺钉压板需要逐颗拆卸、胶粘密封件需要破坏性剥离的繁琐操作，有效减少维修时间，模块化替换方式使密封组件在老化或损坏后能够以非破坏性方式取出，提高维护效率，保证人防门扇长期运行中密封性能的可靠保持，降低结构疲劳与维护成本，显著提升设备使用周期内的可靠性与可维护性。
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Figure CN224800181U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of civil defense door technology, and in particular to a single-leaf movable threshold civil defense door structure with modular replaceable sealing components. Background Technology
[0002] As an important protective device in civil air defense projects, civil defense doors need to have reliable waterproof, anti-toxic and impact-resistant sealing performance during wartime. Therefore, sealing gaskets or sealing rings are usually installed between the door leaves and are fitted to the door frame and the threshold to keep the sealing surface closed. The threshold is a structural component installed during wartime to form the sealing surface. The rubber sealing ring and sealing gasket are sealing structures made of rubber material, and the sealing element is pressed to fit with the corresponding contact surface to achieve a sealed connection.
[0003] However, existing air-raid shelter door gaskets are prone to wear, aging, or deformation during long-term use due to external friction, compression fatigue, and environmental corrosion, leading to a decline in sealing performance. Current gaskets are mostly installed using screw clamps, slot embedding, or adhesive bonding. These installation structures are typically one-time or semi-fixed, making gasket removal difficult after aging, replacement cumbersome, and sometimes requiring removal of the door sill or destructive treatment of the original structure. Therefore, existing technologies cannot achieve quick disassembly and modular replacement after gasket wear, resulting in low maintenance efficiency and a structure unfavorable for maintaining and repairing the seal after long-term use. Utility Model Content
[0004] In view of this, the purpose of this utility model is to propose a single-leaf movable threshold air defense door structure with modular and replaceable sealing components, so as to solve the problems in the prior art that it is impossible to quickly disassemble and modularly replace the sealing ring after it wears out, resulting in low maintenance efficiency and the structure is not conducive to the maintenance and repair of the seal after long-term use.
[0005] Based on the above objectives, this utility model provides a modular, replaceable sealing component for a single-leaf movable threshold air-raid shelter door structure, including a ground floor. A door frame wall is fixedly connected to the top of the ground floor, and a door frame is fixedly installed inside the door frame wall. An air-raid shelter door leaf for protection is installed on the inner wall of the door frame via hinges. A movable threshold is provided between the top of the ground floor and the bottom of the door frame. A sealing component for sealing between the air-raid shelter door leaf and the door frame is provided on the side wall of the air-raid shelter door leaf. The sealing component includes a mounting frame movably installed on the side wall of the air-raid shelter door leaf. Two sets of locking blocks are fixedly connected to the inner wall of the mounting frame, and a sealing ring is movably installed on the outer wall of the mounting frame. Two sets of slots are provided on the side wall of the air-raid shelter door leaf, and the two sets of locking blocks and the two sets of slots are compatible. A replacement mechanism for replacing the sealing ring is provided on the side wall of the air-raid shelter door leaf. The replacement component also includes two sets of sliding cavities formed on the side wall of the air-raid shelter door. Each set of sliding cavities has a limiting plate slidably connected inside. One end of each limiting plate passes through a slot and fits against the side wall of the locking block to limit the installation frame. A movable column is fixedly connected to the opposite side wall of each of the two sets of limiting plates. A first through slot is formed on the side wall of the air-raid shelter door, through which the movable column passes and slides between the inner walls of the first through slot. Movable plates are slidably connected to the side walls of the air-raid shelter door near the two sets of limiting plates. A synchronization rod is fixedly connected between the opposite surfaces of the two movable plates. Each movable plate has two guide slots on its side wall, with one end of each guide slot inclined relative to the other. The movable column passes through and slides inside the guide slot. A handle is rotatably connected to the side wall of each movable plate.
[0006] Preferably, the handle has a threaded post slidably connected inside, a grip sleeve is fitted on the outer wall of the handle, and second through grooves communicating with the inner wall of the handle are opened on both sides of the handle. Two oppositely arranged connecting blocks are fixedly connected to the inner wall of the grip sleeve. The two connecting blocks pass through the second through grooves and are fixedly connected to the side wall of the threaded post. Two vertically opened threaded grooves are fixedly connected to the side wall of the air-raid shelter door leaf. The threaded grooves and one end of the threaded post are threadedly engaged.
[0007] Preferably, a rubber base is fixedly connected to the side wall of the sealing ring. The rubber base is U-shaped. Two opposing barbs are fixedly connected to both sides of the inner wall of the rubber base. The mounting frame has barb grooves on both sides that are adapted to the opposing barbs.
[0008] Preferably, a sealing frame is fixedly connected to the inner wall of the door frame and the top of the movable threshold, and a corrugated protrusion is fixedly connected to the side of the sealing frame near the sealing ring.
[0009] Preferably, when the air-raid shelter door is closed, the sealing ring is tightly fitted to the side wall of the corrugated bump, and the sealing ring is deformed into an ellipse by the compression of the corrugated bump.
[0010] Preferably, the sealing ring is tightly fitted behind the corrugated bump, and a corrugated sealing channel is formed between the air-raid shelter door leaf and the corrugated bump.
[0011] Preferably, a pre-embedded groove is provided at the top of the ground near the bottom of the door frame, and the movable threshold is installed in the pre-embedded groove by bolts. It can be disassembled in subsequent use to keep the ground flush with the bottom of the door frame.
[0012] The beneficial effects of this utility model are: 1. This modular, replaceable sealing component single-leaf movable threshold air-raid shelter door structure, through the linkage structure between the grip sleeve, threaded post, threaded groove, guide groove, and limiting plate, allows the sealing component to be quickly assembled and disassembled without tools. The operator only needs to rotate the grip sleeve to release the limiting of the moving plate, and then lift the handle to make the limiting plate automatically retract into the sliding cavity, thereby releasing the installation frame and allowing the sealing ring to be disassembled as a whole. This structure completely avoids the tedious operation of traditional screw pressure plates that need to be disassembled one by one and adhesive seals that need to be destructively peeled off, effectively reducing maintenance time. The modular replacement method allows the sealing component to be removed non-destructively after aging or damage, improving maintenance efficiency, ensuring the reliable maintenance of the sealing performance of the air-raid shelter door leaf during long-term operation, reducing structural fatigue and maintenance costs, and significantly improving the reliability and maintainability of the equipment throughout its service life.
[0013] 2. The modular, replaceable sealing component of this single-leaf movable threshold air-raid shelter door structure, when the sealing ring contacts the sealing frame, as the air-raid shelter door leaf is pressed together, the sealing ring undergoes local deformation along the raised area of the corrugated bumps under the action of external force. The corrugated bumps cause the sealing ring to undergo multi-point stress deformation, forming a multi-segment corrugated sealing interface between the outer wall of the sealing ring and the side wall of the corrugated bumps, thus forming multiple continuous seals. Even if there are scratches or wear in a certain part of the sealing ring, other raised parts can still maintain a sealed fit, thereby ensuring that the overall sealing effect is not compromised.
[0014] 3. This modular, replaceable sealing assembly for a single-leaf movable threshold blast door utilizes a mechanism where barbs on a rubber base interlock with barb grooves on the mounting frame. The barbs are slightly larger than the groove opening, allowing for moderate elastic compression during insertion and rebound after full insertion, creating a stable clamping force between the outer edge of the barb and the inner wall of the groove. This structure ensures the sealing ring remains secure under pressure from door closure, vibration, or long-term friction, avoiding the slippage and loosening issues of traditional slot-type rubber strips. The modular sealing assembly provides both detachability and robustness, improving the overall durability and stability of the door structure. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the air-raid shelter door leaf and the movable threshold of this utility model; Figure 3 This is a three-dimensional structural diagram of the air-raid shelter door leaf and door frame of this utility model; Figure 4 This is a three-dimensional structural diagram of the mounting frame and sealing ring of this utility model; Figure 5 This is a three-dimensional structural diagram of the card slot and the first through slot of this utility model; Figure 6 This is a three-dimensional structural diagram of the replacement component of this utility model; Figure 7 This is a schematic diagram of the threaded column and threaded groove structure of this utility model; Figure 8 This is a schematic diagram of the pre-embedded groove and movable threshold structure of this utility model; Figure 9 This is a schematic diagram of the barb block and barb groove structure of this utility model.
[0017] The diagram is marked as follows: 1. Ground; 2. Door frame wall; 3. Door frame; 4. Air defense door leaf; 5. Movable threshold; 6. Mounting frame; 7. Locking block; 8. Sealing ring; 9. Locking groove; 10. Sliding cavity; 11. Limiting plate; 12. Moving column; 13. First through groove; 14. Moving plate; 15. Guide groove; 16. Handle; 17. Threaded column; 18. Grip sleeve; 19. Second through groove; 20. Connecting block; 21. Threaded groove; 22. Rubber base; 23. Barbed block; 24. Barbed groove; 25. Sealing frame; 26. Corrugated protrusion; 27. Embedded groove; 28. Synchronizing rod. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0020] like Figures 1 to 9 As shown, the modular replaceable sealing component single-leaf movable threshold air defense door structure includes a ground 1, a door frame wall 2 fixedly connected to the top of the ground 1, a door frame 3 fixedly installed inside the door frame wall 2, and an air defense door leaf 4 for protection installed on the inner wall of the door frame 3 through hinges. In order to form a complete sealing system when the air defense door leaf 4 is closed, a movable threshold 5 that can be lowered in wartime is provided between the top of the ground 1 and the bottom of the door frame 3 to achieve a sealed closure at the bottom. The side wall of the air-raid shelter door 4 is provided with a sealing component for forming a seal between the air-raid shelter door 4 and the door frame 3. The sealing component includes an installation frame 6 that is movably installed on the side wall of the air-raid shelter door 4. Two sets of locking blocks 7 are fixedly connected to the inner wall of the installation frame 6. A sealing ring 8 is movably installed on the outer wall of the installation frame 6 to perform the sealing and fitting function. Two sets of locking slots 9 are opened on the side wall of the air-raid shelter door 4. The two sets of locking blocks 7 and the two sets of locking slots 9 are in a one-to-one correspondence structure to realize the detachable limiting and positioning of the installation frame 6. To facilitate the removal of the sealing ring 8, a replacement assembly is further provided on the side wall of the air defense door 4. The replacement assembly includes two sets of sliding cavities 10 provided on the side wall of the air defense door 4. Limiting plates 11 are slidably connected inside the two sets of sliding cavities 10. One end of the limiting plate 11 can pass into the corresponding slot 9 and fit against the side wall of the corresponding card block 7 to limit the installation frame 6. The ends of the two sets of limiting plates 11 that are close to each other are fixedly connected to a moving column 12. A first through groove 13 is opened on the side wall of the air defense door 4. The moving column 12 slides in the first through groove 13 for guidance and stroke limitation. Two movable plates 14 are slidably installed on the side wall of the air-raid shelter door 4 near the two sets of limiting plates 11. A synchronous rod 28 is fixedly connected between the opposite sides of the two movable plates 14 to ensure that the left and right sets of replacement components move synchronously. Each movable plate 14 has a guide groove 15 that is set at a relative inclination on its side wall. The movable column 12 passes through and slides in the guide groove 15. When the movable plate 14 moves upward, the movable column 12 will be forced to move inward due to the inclined structure of the guide groove 15, thereby driving the limiting plates 11 to slide in the direction of mutual approach, so as to release the limiting inside the slot 9. A handle 16 is rotatably connected to the side wall of the movable plate 14. A threaded post 17 is slidably connected inside the handle 16. A grip sleeve 18 is fitted on the outside of the handle 16. A second through groove 19 communicating with the inside of the handle 16 is opened on both sides. Two connecting blocks 20 are fixedly connected to the inner wall of the grip sleeve 18. The two connecting blocks 20 pass through the second through groove 19 and are fixedly connected to the side wall of the threaded post 17. Two vertically arranged threaded grooves 21 are fixedly connected to the side wall of the air-raid shelter door 4. The threaded grooves 21 are threadedly engaged with one end of the threaded post 17, so that when the grip sleeve 18 rotates, it can drive the threaded post 17 to enter axially. A rubber base 22 is fixedly connected to the side wall of the sealing ring 8. The rubber base 22 has a U-shaped structure. Two opposing barbs 23 are fixedly connected to both sides of the inner wall of the rubber base 22. The barbs 23 are made of elastic rubber, and their outer edges are slightly larger than the groove size of the corresponding barb groove 24. The mounting frame 6 has barb grooves 24 on both sides corresponding to the barbs 23. The groove width of the barb groove 24 is preferably set to 4mm, and the maximum width of the outer edge of the barb 23 is set to 4.2mm to 4.4mm, so as to form a stable and reliable interference clamping effect. When the rubber base 22 is embedded in the mounting frame 6, the barbs 23 can be squeezed and deformed and enter the barb groove 24. After restoring the deformation, they are engaged with the barb groove 24, which improves the installation stability of the sealing ring 8 on the mounting frame 6. A sealing frame 25 is fixedly connected to the inner wall of the door frame 3 and the top of the movable threshold 5. A corrugated protrusion 26 is fixedly connected to the side of the sealing frame 25 near the sealing ring 8. The corrugated protrusion 26 is arranged in a periodic manner along the length of the sealing frame 25. Its cross-section is corrugated. The height of the protrusion can be 3mm to 6mm and the spacing can be 4mm to 10mm. When the air defense door 4 is closed, the sealing ring 8 is pressed against the side wall of the corrugated protrusion 26. After being locally squeezed, the sealing ring 8 is deformed from its original circular structure into an elliptical shape, forming a corrugated contact interface with the sealing frame 25. This creates a continuous corrugated sealing channel between the sealing ring 8 and the corrugated protrusion 26, thus maintaining a stable sealing fit even under local wear. A pre-embedded groove 27 is provided at the top of the ground 1 near the bottom of the door frame 3. The movable threshold 5 is fixed inside the pre-embedded groove 27 by bolts. It can be disassembled and replaced according to the service life or damage, which facilitates passage and forms a bottom sealing surface by fitting with the air-raid shelter door leaf 4 during wartime.
[0021] Workflow: When the sealing component needs to be replaced, the operator holds the grip sleeve 18 and rotates it. The grip sleeve 18 drives the threaded column 17 to rotate synchronously through the connecting block 20, so that the threaded column 17 gradually exits along the thread groove 21, thereby releasing the threaded column 17 from limiting the moving plate 14. Then, the operator lifts the handle 16 upward, and the handle 16 drives the moving plate 14 to slide upward. Since the guide groove 15 has a relatively inclined structure, when the moving plate 14 moves upward, it pulls the moving column 12 towards each other. When the moving column 12 approaches each other, it will drive the limiting plate 11 fixedly connected to it to move inward synchronously, so that the front end of the limiting plate 11 gradually exits the slot 9. After the limiting plate 11 completely leaves the slot 9, the locking block 7 on the inner wall of the mounting frame 6 loses its axial limitation. At this time, the mounting frame 6 and the sealing ring 8 can be removed directly as a whole to achieve quick modular replacement. This structure enables quick assembly and disassembly of the sealing components without the need for screwdrivers or prying the pressure plate, and without damaging the adhesive layer of the rubber strip. Compared with the traditional structure that uses screws, pressure plates or adhesives, this embodiment can achieve non-destructive replacement after the sealing ring ages, making the maintenance efficiency of the air defense door leaf higher and the long-term performance of the structure more stable. At the same time, when the air-raid shelter door 4 is closed, the sealing ring 8 first contacts the sealing frame 25. As the air-raid shelter door is pressed tight, the sealing ring 8 undergoes local deformation along the raised area of the wave protrusion 26 under the action of external force. The wave protrusion 26 causes the sealing ring 8 to form multi-point stress deformation, so that the outer wall of the sealing ring 8 and the side wall of the wave protrusion 26 form a multi-segment wave-shaped sealing interface, that is, forming multiple continuous seals. When there are scratches or wear in a certain part of the sealing ring, other raised parts can still maintain a sealed fit, thereby ensuring that the overall sealing effect is not damaged.
[0022] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
[0023] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A modular, replaceable sealing component single-leaf removable threshold air-raid shelter door structure, comprising a ground (1), a door frame wall (2) fixedly connected to the top of the ground (1), a door frame (3) fixedly installed inside the door frame wall (2), an air-raid shelter door leaf (4) for protection installed on the inner wall of the door frame (3) via hinges, and a removable threshold (5) provided between the top of the ground (1) and the bottom of the door frame (3), characterized in that: The side wall of the air-raid shelter door (4) is provided with a sealing assembly for sealing between the air-raid shelter door (4) and the door frame (3). The sealing assembly includes an installation frame (6) movably installed on the side wall of the air-raid shelter door (4). Two sets of locking blocks (7) are fixedly connected to the inner wall of the installation frame (6). A sealing ring (8) is movably installed on the outer wall of the installation frame (6). Two sets of slots (9) are opened on the side wall of the air-raid shelter door (4). The two sets of locking blocks (7) and the two sets of slots (9) are compatible. The side wall of the air-raid shelter door (4) is provided with a replacement assembly for replacing the sealing ring (8). The replacement assembly also includes two sets of sliding cavities (10) opened on the side wall of the air-raid shelter door (4). Limiting plates (11) are slidably connected inside the two sets of sliding cavities (10). One end of the limiting plate (11) is inserted into the slot (9) and fits against the door frame. On the side wall of the card block (7), a movable column (12) is fixedly connected to the side wall of the two sets of limiting plates (11) facing each other. The side wall of the air defense door (4) is provided with a first through groove (13). The movable column (12) passes through and slides between the inner walls of the first through groove (13). The side wall of the air defense door (4) is slidably connected to the side wall of the two sets of limiting plates (11). A synchronous rod (28) is fixedly connected between the opposite surfaces of the two movable plates (14). The side wall of each movable plate (14) is provided with two guide grooves (15). One end of the two guide grooves (15) is inclined relative to each other. The movable column (12) passes through and slides inside the guide groove (15). The side wall of the movable plate (14) is rotatably connected with a handle (16).
2. The single-leaf movable threshold blast door structure with modular replaceable sealing components according to claim 1, characterized in that, The handle (16) is internally slidably connected to a threaded post (17), and the outer wall of the handle (16) is fitted with a grip sleeve (18). The two sides of the handle (16) are provided with a second through groove (19) that communicates with the inner wall of the handle (16). The inner wall of the grip sleeve (18) is fixedly connected to two oppositely arranged connecting blocks (20). The two connecting blocks (20) pass through the second through groove (19) and are fixedly connected to the side wall of the threaded post (17). The side wall of the air-raid shelter door (4) is fixedly connected to two vertically opened threaded grooves (21). The threaded grooves (21) and one end of the threaded post (17) are threadedly engaged.
3. The single-leaf movable threshold blast door structure with modular replaceable sealing components according to claim 1, characterized in that, The sealing ring (8) is fixedly connected to a rubber base (22). The rubber base (22) is U-shaped. The inner walls of the rubber base (22) are fixedly connected to two oppositely distributed barb blocks (23). The mounting frame (6) has barb grooves (24) on both sides that are compatible with the oppositely distributed barb blocks (23).
4. The single-leaf movable threshold blast door structure with modular replaceable sealing components according to claim 3, characterized in that, The inner wall of the door frame (3) and the top of the movable threshold (5) are both fixedly connected to a sealing frame (25), and a wave protrusion (26) is fixedly connected to the side of the sealing frame (25) near the sealing ring (8).
5. The single-leaf movable threshold blast door structure with modular replaceable sealing components according to claim 4, characterized in that, When the air defense door (4) is closed, the sealing ring (8) fits tightly against the side wall of the wave protrusion (26), and the sealing ring (8) is deformed into an ellipse by the compression of the wave protrusion (26).
6. The single-leaf movable threshold blast door structure with modular replaceable sealing components according to claim 5, characterized in that, After the sealing ring (8) is tightly fitted to the corrugated protrusion (26), a corrugated sealing channel is formed between the air defense door leaf (4) and the corrugated protrusion (26).
7. The single-leaf movable threshold blast door structure with modular replaceable sealing components according to claim 1, characterized in that, A pre-embedded groove (27) is provided at the top of the ground (1) near the bottom of the door frame (3). The movable threshold (5) is installed in the pre-embedded groove (27) by bolts. It can be disassembled in subsequent use to keep the ground (1) flush with the bottom of the door frame (3).