Civil air defense door convenient to maintain or repair

Abstract

The utility model relates to the technical field of civil air defense doors, in particular to a civil air defense door convenient to maintain or repair, which comprises a containing cavity formed in a flange, and a rotating disc with the axis direction consistent with the thickness direction of a door leaf is rotatably arranged in the containing cavity. A plurality of locking parts which are arranged around the axis of the rotating disc at equal intervals and lock the door leaf on the door frame after operation are further installed, pushing parts with the number consistent with that of the locking parts are arranged on the circumferential side edge of the rotating disc at equal intervals, and the rotating disc rotates to push the locking parts to operate through the pushing parts; a mounting groove is formed in the flange, a cover plate used for covering the accommodating cavity is placed at the mounting groove, and the flange is provided with a clamping component used for clamping the cover plate placed at the mounting groove; the clamping component is operated to unlock the cover plate, so that the cover plate can be detached from the mounting groove, workers can maintain or repair all the components conveniently, the service life of the man-machine protection door can be prolonged, and the situation that the man-machine protection door cannot be used can be prevented when the man-machine protection door needs to be used.

Description

Technical Field

[0001] The utility model relates to the technical field of civil air defense doors, in particular to a civil air defense door which is easy to maintain or repair. Background Art

[0002] Civil air defense doors, as a crucial component of underground defense projects, are primarily used to provide enclosed protective spaces during wartime or emergencies, defending against external impacts and the intrusion of harmful substances. However, in traditional civil air defense door designs, the locking mechanism for the door leaf often presents difficulties in maintenance and repair.

[0003] Existing civil air defense doors typically rely on complex locking mechanisms to securely close and lock the door leaf. These mechanisms are often hidden within the door leaf or door frame, making them difficult to access for maintenance or repair. Furthermore, because these mechanisms often involve the precise coordination of multiple components, any failure often requires disassembly and reinstallation, a tedious and time-consuming process.

[0004] In practice, the locking mechanisms of civil air defense doors may experience wear, aging, or damage due to long-term use, environmental factors, or improper human operation. Failure to promptly and effectively maintain and repair these mechanisms may result in the door not closing or locking properly, compromising its protective effectiveness.

[0005] In order to solve the above problems and improve the reliability and service life of civil air defense doors, a civil air defense door that is easy to maintain or repair is provided. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a civil air defense door that is easy to maintain or repair, which can solve the technical problem that the locking mechanism of the existing civil air defense door is difficult to maintain and repair.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A civil air defense door that is easy to maintain or repair, comprising a door leaf and a door frame, a hinged component being installed between the door leaf and the door frame, and a flange for being embedded in the door frame being provided on a side of the door leaf close to the door frame;

[0009] A housing chamber is formed in the flange, and a turntable is rotatably provided in the housing chamber, the axis direction of which is consistent with the thickness direction of the door leaf. A plurality of locking components are also installed, which are arranged equidistantly around the axis of the turntable and lock the door leaf to the door frame after operation. Pushing members are equidistantly provided on the circumferential side of the turntable, and the number of the pushing members is the same as the number of the locking members. The rotation of the turntable can drive the locking members to operate through the pushing members.

[0010] A mounting groove is formed on the flange, and a cover plate for covering the accommodating chamber is placed at the mounting groove. The flange is provided with a clamping component for clamping the cover plate placed at the mounting groove.

[0011] According to an embodiment of the present invention, a personal air defense door that is easy to maintain or repair has at least the following beneficial effects: when it is necessary to maintain or repair the turntable, locking component and pushing member arranged in the accommodating chamber, the clamping component is operated to unlock the cover plate, and the cover plate can be removed from the installation groove. All components in the accommodating chamber are displayed, which is convenient for the staff to maintain or repair the components. It can not only improve the service life of the personal air defense door, but also prevent the personal air defense door from being unusable when it is needed.

[0012] According to some embodiments of the present invention, clamping components are provided on the upper and lower parts of the flange, so that the cover plate can be more stable when installed in the installation groove.

[0013] The clamping component includes a fixed block arranged on the cover plate, and the flange is provided with a transversely arranged sliding groove. A clamping block for clamping the fixed block is slidably provided in the sliding groove. Force is applied to the clamping block to make it slide transversely, so that the clamping block is separated from the fixed block or clamped to the fixed block, thereby improving installation efficiency.

[0014] The cover plate is provided with a control component for controlling the turntable to rotate clockwise or counterclockwise. By operating the control component, the turntable can be controlled to rotate clockwise or counterclockwise so as to lock the door leaf on the door frame.

[0015] The control component includes a first rotating shaft coaxially arranged with the turntable. One end of the first rotating shaft extends into the accommodating chamber and is formed with a plug-in portion. A slot for the plug-in portion is formed at the center point of the turntable. A gear is provided on the end of the first rotating shaft away from the plug-in portion. A second rotating shaft rotatably mounted on the cover plate, with its axis parallel to the axis of the first rotating shaft, is provided with a tooth block that meshes with the gear. The tooth block is provided with a swing arm extending eccentrically along the radial direction of the second rotating shaft. Pulling the swing arm rotates the tooth block, thereby driving the gear to rotate, thereby controlling the rotation of the turntable. Power is provided by pulling the swing arm, and under the action of the lever principle, workers can save more effort.

[0016] The cover plate is provided with an arc-shaped guide rail, the swing arm is fixed with a sliding part, and the sliding part is slidably arranged on the guide rail. Under the action of the guide rail and the sliding part, force is applied to the swing arm to make it swing, which can be more stable.

[0017] At least four locking components are provided to align with different side walls inside the door frame respectively. When the door leaf is locked to the door frame through the locking components, it can be more stable and firm, thereby improving the use effect of the personal security door.

[0018] The locking component includes a plurality of guide blocks arranged on the inner wall of the accommodating chamber, a guide rod with an axis perpendicular to the axis of the turntable is provided in the guide block, and a sliding frame that can slide toward or away from the turntable is provided on the guide rod; a plurality of locking grooves are formed on the side wall opposite to the sliding frame in the door frame, and the sliding frame is equipped with a plurality of locking members for passing through the flange and inserting into the locking groove to lock the door leaf, and the number of locking members corresponds to the number of locking grooves; the sliding frame is provided with a fixing rod with an axis parallel to the axis of the turntable and for contacting the pushing member; when force is applied to the sliding frame to make it slide in the direction away from the turntable, the locking member is passed through the flange and inserted into the locking groove to lock the door leaf on the door frame. The structure is simple and easy to operate.

[0019] The inner wall of the accommodating chamber is provided with a mounting rod whose axis is parallel to the axis of the guide rod. The mounting rod and the sliding frame are slidably arranged. A spring is wound around the mounting rod for applying a thrust to the sliding frame toward the turntable. With the cooperation of the mounting rod and the spring, after the force on the sliding frame stops, the spring applies a thrust to the sliding frame toward the turntable, thereby pushing the sliding frame to reset, so that the locking piece can automatically disengage from the locking groove, thereby achieving the effect of unlocking the door leaf.

[0020] The pusher is formed with an arc surface which pushes the fixed rod to move away from the turntable when the turntable rotates; the pusher is formed with a stopping portion which is located at the end of the arc surface and is used to block the fixed rod; the end of the arc surface is formed with a limiting groove which is used to clamp the fixed rod blocked by the stopping portion; the turntable is prevented from automatically resetting clockwise under the combined action of the arc surface and the spring pressure. When a certain force is applied to the swing arm and the turntable is controlled to reset clockwise, the fixed rod automatically disengages from the limiting groove without the need for additional operation, thereby improving the convenience of operation.

[0021] The benefit is that when it is necessary to maintain or repair the turntable, locking component and pushing member arranged in the accommodating chamber, the clamping component is operated to unlock the cover, and the cover can be removed from the installation groove. All components in the accommodating chamber are displayed, which is convenient for the staff to maintain or repair each component. It can not only increase the service life of the personal defense door, but also prevent the personal defense door from being unusable when it is needed.

[0022] After completing maintenance or repair, the cover is placed back in the installation slot, and then the clamping component is operated to clamp the cover through the clamping component to achieve installation of the cover. Under the action of the clamping component, the installation efficiency of the cover is greatly improved.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of an embodiment of the present invention showing a door leaf in an open state;

[0027] Figure 3 for Figure 1 A schematic diagram of the internal structure of the door leaf is shown;

[0028] Figure 4 for Figure 1 A schematic diagram of the door leaf from another perspective is shown;

[0029] Figure 5 for Figure 3 A schematic diagram of the locking components is shown;

[0030] Figure 6 for Figure 5 A schematic diagram of a pusher is shown.

[0031] Figure numerals: 1. door frame; 11. hinged component; 2. door leaf; 21. flange; 22. accommodating chamber; 23. mounting groove; 24. cover plate; 25. fixing block; 26. slide groove; 27. block; 28. pull handle; 29. handle; 210. seal; 3. turntable; 31. fixing seat; 4. locking component; 41. guide block; 42. guide rod; 43. sliding frame; 44. locking member; 45. fixing rod; 46. locking groove; 47. mounting rod; 48. spring; 5. pushing member; 51. arc surface; 52. stopper; 53. limiting groove; 6. control component; 61. first rotating shaft; 62. gear; 63. plug-in part; 64. slot; 65. second rotating shaft; 66. gear block; 67. swing arm; 68. guide rail; 69. sliding member. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of this utility model, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. If a first or second is mentioned, this is solely for the purpose of distinguishing the technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0035] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted, connected, and connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] Reference below Figures 1-6 A detailed description of a civil air defense door that is easy to maintain or repair is given in a specific embodiment. It is worth noting that the following description is merely an illustrative description and is not intended to limit the utility model.

[0037] like Figure 1-Figure 4 As shown, a maintenance-friendly civil air defense door comprises a door leaf 2 and a door frame 1 for fixing to a concrete wall. A hinge 11 is installed between the door leaf 2 and the door frame 1, allowing the door leaf 2 to be movably mounted on the door frame 1. The door leaf 2 is constructed of reinforced concrete mesh and cast concrete, providing high strength and impact resistance. It can also be filled with fire-resistant fillers to enhance its fire, smoke, and water resistance. A flange 21 is provided on the side of the door leaf 2 near the door frame 1, designed to fit within the door frame 1. When the door leaf 2 is closed, the flange 21 engages with the door frame 1, creating a seal that effectively prevents the entry of harmful substances such as radioactive dust, toxic gases, and biological warfare agent aerosols, ensuring safety for personnel and equipment inside. An annular seal 210 is provided on the side of the door leaf 2 near the door frame 1. When the door leaf 2 is closed, the seal 210 compresses, filling the small gap between the door leaf 2 and the door frame 1 and further enhancing the sealing performance.

[0038] Among them, the flange 21 is formed with a accommodating chamber 22, and a turntable 3 is rotatably provided in the accommodating chamber 22, whose axial direction is consistent with the thickness direction of the door leaf 2. A plurality of locking components 4 are also installed, which are equidistantly arranged around the axis of the turntable 3 and lock the door leaf 2 to the door frame 1 after operation. There are at least four locking components 4, which are respectively aligned with different side walls inside the door frame 1. In addition, pushers 5 are equidistantly provided on the circumferential side of the turntable 3, and the number of pushers 5 is the same as the number of locking components 4. The rotation of the turntable 3 can push the locking components 4 to operate, thereby locking the door leaf 2 to the door frame 1. Specifically, one pusher 5 corresponds to one locking component 4. When the control turntable 3 is rotated, the pusher 5 pushes several locking components 4 to operate simultaneously, thereby locking the door leaf 2 to the door frame 1, achieving the effect of locking the door.

[0039] Furthermore, the flange 21 is formed with a mounting groove 23 placed at the opening of the accommodating chamber 22, and a cover plate 24 for covering the accommodating chamber 22 is placed at the mounting groove 23. The upper and lower parts of the flange 21 are both provided with clamping components for clamping the cover plate 24 placed in the mounting groove 23. Clamping components can also be provided on the left and right parts of the flange 21. The cover plate 24 is placed in the mounting groove 23, and then the clamping components are operated to clamp the cover plate 24 through the clamping components to achieve the installation of the cover plate 24; when the cover plate 24 needs to be removed, the clamping components are operated to unlock the cover plate 24, and the cover plate 24 can be removed from the mounting groove 23 (such as Figure 3 As shown), it is convenient for the staff to maintain or repair the various components in the accommodating chamber 22, which not only increases the service life of the personal defense door, but also prevents the personal defense door from being unusable when it is needed.

[0040] The clamping components include a fixing block 25 mounted on the cover 24. The flange 21 is provided with a transversely arranged slide groove 26. Each slide groove 26 is provided with a slidably mounted block 27 for retaining the fixing block 25. When the fixing blocks 25 at the upper and lower portions of the cover 24 are respectively retained by different blocks 27, the cover 24 can be mounted in the mounting groove 23. To remove the cover 24, force is applied to the blocks 27 to slide them laterally, disengaging them from the fixing blocks 25 and allowing the cover 24 to be removed. Additionally, a pull handle 28 is provided on the blocks 27, which facilitates the application of force to the blocks 27 for laterally moving them.

[0041] The cover plate 24 is provided with a handle 29 for easy transportation. Workers can use the handle 29 to carry the cover plate 24, further improving the convenience of installing and removing the cover plate 24. In order to make the turntable 3 rotate within the accommodating chamber 22, a fixing seat 31 is installed in the accommodating chamber 22. The cover plate 24 is rotatably mounted on the fixing seat 31. The cover plate 24 is equipped with a control component 6 for controlling the forward and reverse rotation of the turntable 3. By operating the control component 6, the turntable 3 is controlled to rotate forward and reverse (i.e., clockwise and counterclockwise). When the control turntable 3 rotates counterclockwise to a certain angle, the pusher 5 pushes the locking component 4 to operate, locking the door leaf 2 to the door frame 1. After the control turntable 3 is reset clockwise, the locking component 4 resets to unlock the door leaf 2, allowing the door leaf 2 to be opened.

[0042] In some specific embodiments of the present invention, the control component 6 includes a first rotating shaft 61 coaxially arranged with the turntable 3. One end of the first rotating shaft 61 extends into the accommodating chamber 22 and is formed with a plug-in portion 63. A slot 64 for inserting the plug-in portion 63 is formed at the center point of the turntable 3. The plug-in portion 63 can be shaped like a "X", "I", or "M", and the slot 64 is designed according to the shape of the plug-in portion 63. When the first rotating shaft 61 is driven to rotate, the turntable 3 is rotated together. Furthermore, the provision of the plug-in portion 63 and the slot 64 allows the first rotating shaft 61 to be separated from the turntable 3, facilitating the installation and removal of the cover plate 24.

[0043] To drive the first rotating shaft 61 to rotate, a gear 62 is provided at one end of the first rotating shaft 61, distal from the insertion portion 63. A second rotating shaft 65, axially parallel to the axis of the first rotating shaft 61, is rotatably mounted on the cover plate 24. A tooth block 66 is provided on the second rotating shaft 65, meshing with the gear 62. The tooth block 66 is also provided with a swing arm 67 extending eccentrically along the radial direction of the second rotating shaft 65. When a worker pulls the swing arm 67, the tooth block 66 rotates, thereby driving the gear 62 to rotate, thereby controlling the rotation of the turntable 3. Furthermore, by providing power by pulling the swing arm 67, the worker can save effort thanks to the principle of leverage.

[0044] The cover 24 is also provided with an arc-shaped guide rail 68, and the swing arm 67 is fixed with a sliding member 69, and the sliding member 69 is slidably set on the guide rail 68; when the swing arm 67 is pulled to swing, the sliding member 69 slides on the guide rail 68. Under the action of the guide rail 68 and the sliding member 69, force is applied to the swing arm 67 to make it more stable when swinging.

[0045] like Figure 5As shown, the locking component 4 includes a plurality of guide blocks 41 disposed on the inner sidewalls of the accommodating chamber 22. A guide rod 42 having an axis perpendicular to the axis of the turntable 3 is disposed within the guide block 41. A sliding frame 43 is mounted on the guide rod 42 and can slide toward or away from the turntable 3. Furthermore, a plurality of locking grooves 46 are formed on the sidewalls of the door frame 1 opposite the sliding frames 43. The sliding frame 43 is equipped with a plurality of locking members 44 for passing through the flange 21 and inserting into the locking grooves 46 to lock the door leaf 2. The number of locking members 44 corresponds to the number of locking grooves 46. When force is applied to the sliding frame 43 to cause it to slide away from the turntable 3, the locking members 44 pass through the flange 21 and insert into the locking grooves 46, thereby locking the door leaf 2 to the door frame 1.

[0046] In order to apply force to the sliding frame 43, a fixed rod 45 is provided on the sliding frame 43, whose axis is parallel to the axis of the turntable 3 and is used to contact the pushing member 5. When the turntable 3 is controlled to rotate counterclockwise, the pushing member 5 applies a force toward the locking groove 46 to the fixed rod 45, thereby causing the sliding frame 43 to slide in the direction of the locking groove 46. When the control dial 3 is rotated clockwise to reset, in order to allow the locking member 44 to automatically disengage from the locking groove 46, a mounting rod 47 whose axis is parallel to the axis of the guide rod 42 is provided on the inner wall of the accommodating chamber 22. The mounting rod 47 is slidably arranged with the sliding frame 43, and a spring 48 is wound around the mounting rod 47 for applying a thrust to the sliding frame 43 toward the direction of the turntable 3; when the sliding frame 43 is pushed to slide in the direction of the locking groove 46, the spring 48 is compressed. When the control dial 3 is rotated clockwise to reset, under the action of the compressed spring 48, a thrust is applied to the sliding frame 43 toward the turntable 3, thereby pushing the sliding frame 43 to reset, so that the locking member 44 can automatically disengage from the locking groove 46, thereby achieving the effect of unlocking the door leaf 2.

[0047] like Figure 6As shown, the pusher 5 is formed with an arcuate surface 51 that pushes the fixed rod 45 away from the turntable 3 when the turntable 3 rotates. When the turntable 3 rotates counterclockwise, the arcuate surface 51 on the pusher 5 contacts the surface of the fixed rod 45, and the turntable 3 rotates and cooperates with the arcuate surface 51 to push the fixed rod 45 to move. The pusher 5 is formed with a stopper 52 located at the end of the arcuate surface 51 and used to block the fixed rod 45. Under the action of the stopper 52, the rotation angle of the turntable 3 is limited. When the turntable 3 rotates counterclockwise and the fixed rod 45 contacts the stopper 52, the turntable 3 cannot rotate counterclockwise. At this time, the locking member 44 is properly inserted into the locking groove 46. In addition, after the locking piece 44 is inserted into the locking groove 46 and locks the door leaf 2, the spring 48 is compressed and applies a force to the sliding frame 43 in the direction of the turntable 3. In order to prevent the turntable 3 from automatically resetting clockwise under the combined action of the arc surface 51 and the pressure of the spring 48, a limiting groove 53 is formed at the end of the arc surface 51 for clamping the fixing rod 45 blocked by the stopping portion 52; after the stopping portion 52 blocks the fixing rod 45, the fixing rod 45 automatically snaps into the limiting groove 53, thereby limiting the fixing rod 45; because the surface where the fixing rod 45 contacts the arc surface 51 is a circular arc surface, when a certain force is applied to the swing arm 67 and the turntable 3 is controlled to reset clockwise, the fixing rod 45 automatically disengages from the limiting groove 53, and no additional operation is required, thereby improving the convenience of operation.

[0048] Throughout this specification, references to terms such as "one embodiment, some embodiments, exemplary embodiments, examples, specific examples, or some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A civil air defense door that is easy to maintain or repair, comprising a door leaf (2) and a door frame (1), a hinged component (11) being installed between the door leaf (2) and the door frame (1), and a flange (21) for embedding into the door frame (1) being provided on a side of the door leaf (2) close to the door frame (1), characterized in that: A housing chamber (22) is formed in the flange (21), and a turntable (3) is rotatably provided in the housing chamber (22), the axis direction of which is consistent with the thickness direction of the door leaf (2). A plurality of locking components (4) are also provided, which are equidistantly arranged around the axis of the turntable (3) and lock the door leaf (2) to the door frame (1) after operation. Pushing components (5) are equidistantly provided on the circumferential side of the turntable (3), the number of which is consistent with the number of the locking components (4). The rotation of the turntable (3) can push the locking components (4) to operate through the pushing components (5); A mounting groove (23) is formed on the flange (21), and a cover plate (24) for covering the accommodating chamber (22) is placed at the mounting groove (23). The flange (21) is provided with a clamping component for clamping the cover plate (24) placed at the mounting groove (23).

2. The civil air defense door that is easy to maintain or repair according to claim 1, characterized in that: The upper and lower parts of the flange (21) are both provided with clamping components.

3. The civil air defense door that is easy to maintain or repair according to claim 2, characterized in that: The clamping component includes a fixing block (25) arranged on the cover plate (24); the flange (21) is provided with a transversely arranged sliding groove (26); and a clamping block (27) for clamping the fixing block (25) is slidably provided in the sliding groove (26).

4. The civil air defense door that is easy to maintain or repair according to claim 1, characterized in that: A control component (6) for controlling the turntable (3) to rotate clockwise or counterclockwise is mounted on the cover plate (24).

5. The civil air defense door that is easy to maintain or repair according to claim 4, characterized in that: The control component (6) includes a first rotating shaft (61) coaxially arranged with the rotating disk (3), one end of the first rotating shaft (61) extends into the accommodating chamber (22) and is formed with a plug-in portion (63), and a slot (64) for inserting the plug-in portion (63) is formed at the center point of the rotating disk (3); a gear (62) is provided on one end of the first rotating shaft (61) away from the plug-in portion (63), and a second rotating shaft (65) axially parallel to the axial direction of the first rotating shaft (61) is rotatably provided on the cover plate (24), a tooth block (66) meshing with the gear (62) is provided on the second rotating shaft (65), and a swing arm (67) extending in a radial eccentric direction of the second rotating shaft (65) is provided on the tooth block (66).

6. The civil air defense door that is easy to maintain or repair according to claim 5, characterized in that: The cover plate (24) is provided with an arc-shaped guide rail (68), the swing arm (67) is fixedly provided with a sliding member (69), and the sliding member (69) is slidably arranged on the guide rail (68).

7. The civil air defense door that is easy to maintain or repair according to claim 1, characterized in that: At least four locking components (4) are provided to align with different side walls inside the door frame (1) respectively.

8. The civil air defense door that is easy to maintain or repair according to claim 7, characterized in that: The locking component (4) includes a plurality of guide blocks (41) arranged on the inner side wall of the accommodating chamber (22), a guide rod (42) whose axis is perpendicular to the axis of the turntable (3) is provided in the guide block (41), and a sliding frame (43) that can slide toward or away from the turntable (3); a plurality of locking grooves (46) are formed on the side wall of the door frame (1) opposite to the sliding frame (43), and a plurality of locking members (44) are installed on the sliding frame (43) for passing through the flange (21) and inserting into the locking grooves (46) to lock the door leaf (2), and the number of the locking members (44) corresponds to the number of the locking grooves (46); the sliding frame (43) is provided with a fixing rod (45) whose axis is parallel to the axis of the turntable (3) and is used to contact the pushing member (5).

9. The civil air defense door that is easy to maintain or repair according to claim 8, characterized in that: The inner wall of the accommodating chamber (22) is provided with a mounting rod (47) whose axis is parallel to the axis of the guide rod (42). The mounting rod (47) and the sliding frame (43) are slidably arranged. A spring (48) is wound around the mounting rod (47) for applying a force to the sliding frame (43) toward the turntable (3).

10. The civil air defense door that is easy to maintain or repair according to claim 9, characterized in that: The pusher (5) is formed with an arc surface (51) for pushing the fixed rod (45) to move in a direction away from the turntable (3) when the turntable (3) rotates; the pusher (5) is formed with a stopper (52) disposed at the end of the arc surface (51) and used to block the fixed rod (45); and the end of the arc surface (51) is formed with a limiting groove (53) for clamping the fixed rod (45) blocked by the stopper (52).

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