A subway engineering civil air defense protection equipment and installation method

Abstract

The application discloses a subway engineering civil air defense protection equipment and an installation method, relates to the technical field of civil air defense engineering, and comprises a door frame, a door leaf, a load-bearing seat and an upper suspension frame. The load-bearing seat is embedded in the soil layer at the bottom of the door frame, the upper suspension frame is embedded in the wall at the top of the door frame, rotating shafts are arranged on the upper suspension frame and the load-bearing seat, the rotating shafts are vertically arranged, mounting holes are formed in the upper and lower horizontal frames of the door frame in the vertical direction, the rotating shafts on the upper suspension frame are rotatably arranged in the mounting holes in the upper horizontal frame of the door frame, the rotating shafts on the load-bearing seat are rotatably arranged in the mounting holes in the lower horizontal frame of the door frame, the door leaf is arranged in the door frame and located between the two rotating shafts, fixing mechanisms for fixing the two rotating shafts are arranged on the door leaf, and a door lock device for fixing the door leaf is arranged on the door frame. The application has the effect that the fitting surface between the door leaf and the door frame is not prone to gaps.

Description

Technical Field

[0001] This application relates to the technical field of civil defense engineering, and in particular to a civil defense protection device and installation method for subway engineering. Background Technology

[0002] Civil defense protective equipment is a crucial component of subway civil defense projects, ensuring the safety of personnel and materials within the project after a wartime weapon attack. It must simultaneously possess protective and airtight functions. This requires that the equipment be rationally designed to meet sufficient resistance requirements, while also ensuring installation precision to smoothly maintain its airtight function during peacetime-wartime conversion. Furthermore, to achieve rapid peacetime-wartime conversion, the civil defense doors must open and close flexibly and effortlessly. Therefore, the verticality of the door frame, the gap between the door leaf and the door frame mating surface, the opening and closing force of the door leaf, and the locking operation force must all meet specified limits, placing stringent requirements on the installation quality and precision of the civil defense protective equipment.

[0003] Currently, the door frame and door leaf of a civil defense door are usually connected by hinges. The connection strength between the door frame and the door leaf is limited, and the weight of the door leaf directly acts on the hinges and the door frame. During use, the hinges wear out severely due to the weight of the door leaf and are prone to deformation, causing the door leaf to shift and resulting in gaps between the mating surfaces of the door leaf and the door frame. Summary of the Invention

[0004] To address the problems existing in the prior art, this application provides a civil defense protection device and installation method for subway engineering.

[0005] Firstly, this application provides a civil defense protection device for subway engineering, which adopts the following technical solution:

[0006] A civil defense protection device for subway engineering includes a door frame, a door leaf, a load-bearing base, and an upper suspension. The load-bearing base is embedded in the soil layer at the bottom of the door frame, and the upper suspension is embedded in the wall at the top of the door frame. Both the upper suspension and the load-bearing base are rotatably equipped with a pivot, the axis of which is vertical. The upper and lower frames of the door frame are provided with mounting holes along the vertical direction. The pivot on the upper suspension rotatably passes through the mounting hole in the upper frame of the door frame, and the pivot on the load-bearing base rotatably passes through the mounting hole in the lower frame of the door frame. The door leaf is set inside the door frame and located between the two pivots, and the door leaf is respectively provided with a fixing mechanism for fixing the two pivots. The door frame is provided with a door lock device for fixing the door leaf.

[0007] Optionally, the fixing mechanism includes a slider slidably disposed on the door leaf, a rod fixedly disposed on the slider, and a limiting component for preventing the slider from sliding. The door leaf has a groove for the slider to slide, and the rotating shaft has a hole along the axial direction of the rotating shaft. The hole is adapted to the rod and is used for inserting the rod.

[0008] Optionally, the limiting assembly includes a limiting screw, a transmission rod, a worm gear, and a worm. The limiting screw is rotatably disposed in the slide groove and is threadedly engaged with the slider. The side wall of the door leaf has a through hole communicating with the slide groove. The transmission rod is rotatably disposed in the through hole. The worm gear is coaxially and fixedly connected to the limiting screw. The worm is coaxially and fixedly connected to the transmission rod and meshes with the worm gear.

[0009] Optionally, the side wall of the insertion rod is provided with multiple limiting strips, and each limiting strip is distributed at equal intervals along the circumference of the insertion rod. The side wall of the insertion hole is provided with multiple limiting grooves along the axial direction of the rotating shaft. The limiting grooves correspond one-to-one with the limiting strips and are used for the insertion of the corresponding limiting strips.

[0010] Optionally, the inner wall of the insertion hole is provided with an internal thread, and a stud is connected to the internal thread of the insertion hole. The end of the stud is provided with a hexagonal groove, and the stud is used to abut against the insertion rod.

[0011] Optionally, a bushing is fixedly installed on both the upper suspension and the load-bearing seat. The bushing is sleeved on the rotating shaft, and a sliding sleeve is slidably sleeved on the bushing. A return spring is also sleeved on the bushing. The two ends of the return spring on the upper suspension are fixedly connected to the sliding sleeve and the upper suspension, respectively. The two ends of the return spring on the load-bearing seat are fixedly connected to the sliding sleeve and the load-bearing seat, respectively.

[0012] Optionally, a locking block is fixedly provided on the back of the door leaf, a locking groove is provided on the side frame of the door frame for the locking block to be screwed in, a receiving groove is provided on the side wall of the locking groove, an insert block is slidably provided in the receiving groove, an insertion groove is provided on the locking block for the insert block to be inserted, and a driving component is provided on the door frame for driving the insert block to slide.

[0013] Optionally, the drive assembly includes a transmission screw, a screw sleeve, and a drive component. An installation cavity is provided inside the side frame of the door frame. The transmission screw is rotatably disposed in the installation cavity. The screw sleeve is sleeved on the transmission screw and threadedly connected to the transmission screw. A connecting groove is provided on the side wall of the receiving groove along the length direction of the transmission screw. A connecting block is fixedly disposed on the insert block. The connecting block is slidably disposed in the connecting groove and fixedly connected to the screw sleeve. The drive component is used to drive the transmission screw to rotate.

[0014] Optionally, the driving component includes a handle, which is rotatably mounted on the door frame. A first bevel gear is coaxially fixed on the handle, and a second bevel gear is coaxially fixed on the transmission screw. The first bevel gear meshes with the second bevel gear.

[0015] Secondly, this application provides a method for installing civil defense protection equipment in subway engineering, adopting the following technical solution:

[0016] A method for installing civil defense protection equipment in subway engineering includes the following steps:

[0017] S1. Installation of load-bearing base: Install the load-bearing base in the soil layer at the bottom of the installation position of the air-raid shelter door, and adjust the position of the load-bearing base so that the pivot on the load-bearing base is vertical.

[0018] S2. Install the upper suspension frame inside the wall at the top of the air defense door installation location, and adjust the position of the upper suspension frame so that the axis of rotation on the load-bearing seat coincides with the central axis of the axis of rotation on the upper suspension frame.

[0019] S3. Door frame installation: Install the door frame between the load-bearing base and the upper suspension, and make the pivot on the load-bearing base and the pivot on the upper suspension pass through the mounting holes on the upper and lower sides of the door frame respectively, and then fix the door frame.

[0020] S4. Install the door leaf inside the door frame and between the two pivots, then fix the door leaf to the two pivots respectively.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. This application, by setting up a load-bearing base and an upper suspension, allows the door leaf to be fixed to the pivots on the load-bearing base and the upper suspension during installation. During use, the weight of the door leaf is directly transferred to the load-bearing base and the upper suspension via the pivots, thereby reducing the stress on the door frame and minimizing the possibility of deformation. Simultaneously, by eliminating the traditional hinge connection between the door frame and the door leaf, wear and deformation of the hinges due to the weight of the door leaf are avoided, preventing door leaf misalignment. Gaps between the door leaf and the door frame are also less likely to occur. Furthermore, by setting up a load-bearing base and an upper suspension, with the load-bearing base embedded in the soil at the bottom of the door frame and the upper suspension embedded in the wall at the top of the door frame, and with the pivots on both the load-bearing base and the upper suspension passing through mounting holes on the upper and lower sides of the door frame, the structural strength of the door frame and door leaf is significantly increased, and the service life of the blast door is extended.

[0023] 2. During the use of the air-raid shelter door, friction inevitably occurs between the pivot and the load-bearing seat or upper suspension, causing the door leaf to sag. By sliding the insert rod onto the door leaf and installing a stud in the insertion hole of the pivot, the position of the stud can be adjusted by rotating the stud through the hexagonal groove on the stud. At the same time, by sliding the insert rod to make the insert rod and the stud abut against each other, the vertical position of the door leaf can be finely adjusted, avoiding friction between the door leaf and the door frame due to the lower layer, making the opening and closing of the door leaf smoother.

[0024] 3. This application provides a locking block on the back of the door leaf. When the door leaf is closed, the locking block rotates into the locking groove of the door frame. Then, the drive component drives the insert block to slide and insert it into the insertion groove on the locking block, preventing the locking block from disengaging from the locking groove. This prevents the door leaf from rotating and avoids external personnel from opening the door leaf by damaging the door lock device, thereby further increasing the security of the blast door. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0026] Figure 2 This is a schematic diagram illustrating the structure of the rotating shaft according to an embodiment of this application;

[0027] Figure 3 yes Figure 2 Enlarged view of section A;

[0028] Figure 4 This is a schematic diagram illustrating the structure of the door leaf in an embodiment of this application;

[0029] Figure 5 yes Figure 4 Enlarged view of section B;

[0030] Figure 6 This is a schematic diagram illustrating the structure of the insertion rod in an embodiment of this application;

[0031] Figure 7 This is a schematic diagram illustrating the structure of the locking block in an embodiment of this application;

[0032] Figure 8 yes Figure 7 A magnified view of section C.

[0033] Explanation of reference numerals in the attached drawings: 1. Door frame; 11. Mounting hole; 12. Locking groove; 13. Insert block; 131. Connecting block; 14. Transmission screw; 141. Second bevel gear; 15. Screw sleeve; 16. Rotary handle; 161. First bevel gear; 2. Door leaf; 21. Sliding block; 22. Insert rod; 221. Limiting strip; 23. Slide groove; 24. Limiting screw; 25. Transmission rod; 251. Hexagonal block; 26. Worm gear; 27. Worm; 28. Locking block; 281. Insertion groove; 3. Load-bearing seat; 4. Upper suspension; 5. Rotating shaft; 51. Bearing; 52. Bushing; 53. Slide sleeve; 54. Return spring; 55. Insertion hole; 56. Limiting groove; 57. Stud; 571. Hexagonal groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0035] This application discloses a civil defense protection device for subway engineering. (Refer to...) Figure 1 It includes a door frame 1, a door leaf 2 that is rotatably installed in the door frame 1, a load-bearing seat 3 that is embedded in the soil layer at the bottom of the installation position of the door frame 1, and an upper suspension 4 that is embedded in the top wall at the installation position of the door frame 1. The door frame 1 is provided with a door lock device for fixing the door leaf 2. The door lock device can be any one of an electronic combination lock, a fingerprint lock or a mechanical lock.

[0036] Reference Figure 2 , 3 Both the load-bearing seat 3 and the upper suspension 4 are rotatably equipped with a rotating shaft 5, and both rotating shafts 5 are fitted with bearings 51. The outer ring of the bearing 51 on the load-bearing seat 3 is fixedly connected to the load-bearing seat 3, and the outer ring of the bearing 51 on the upper suspension 4 is fixedly connected to the upper suspension 4. The axis of the rotating shaft 5 is vertical, and after the load-bearing seat 3 and the upper suspension 4 are installed, the central axis of the rotating shaft 5 on the load-bearing seat 3 and the rotating shaft 5 on the upper suspension 4 coincide. The upper and lower frames of the door frame 1 are provided with mounting holes 11 in the vertical direction. The mounting holes 11 are adapted to the rotating shaft 5, and the rotating shaft 5 on the upper suspension 4 is rotatably inserted into the mounting hole 11 on the upper frame of the door frame 1, and the rotating shaft 5 on the load-bearing seat 3 is rotatably inserted into the mounting hole 11 on the lower frame of the door frame 1.

[0037] Reference Figure 3 Both the upper suspension 4 and the load-bearing seat 3 are fixedly equipped with bushings 52. The bushings 52 on the upper suspension 4 are fitted onto the rotating shaft 5 on the upper suspension 4, and the bushings 52 on the load-bearing seat 3 are fitted onto the rotating shaft 5 on the load-bearing seat 3. A sliding sleeve 53 is slidably fitted on the bushings 52, and a return spring 54 is also fitted on the bushings 52. The two ends of the return spring 54 on the upper suspension 4 are fixedly connected to the sliding sleeve 53 and the upper suspension 4, respectively. The two ends of the return spring 54 on the load-bearing seat 3 are fixedly connected to the sliding sleeve 53 and the load-bearing seat 3, respectively. Since the load-bearing seat 3, the upper suspension 4 and the door frame 1 usually need to be fixed with reinforced concrete when reinstalled, by fitting the bushings 52 onto the rotating shaft 5 and using the return spring 54 to make the sliding sleeve 53 press against the door frame 1, the rotating shaft 5 is shielded, preventing the concrete from solidifying the rotating shaft 5.

[0038] Reference Figure 4 , 5The upper and lower sides of the door leaf 2 are respectively provided with fixing mechanisms for fixing the two rotating shafts 5. The fixing mechanism includes a slider 21 slidably mounted on the door leaf 2, a plug rod 22 fixedly mounted on the slider 21, and a limiting component for preventing the slider 21 from sliding. The upper and lower side walls of the door leaf 2 are provided with grooves 23 along the height direction of the door leaf 2. The slider 21 on the fixing mechanism for connecting the rotating shaft 5 on the upper suspension 4 is slidably mounted in the groove 23 above the door leaf 2. The slider 21 on the fixing mechanism for connecting the rotating shaft 5 on the load-bearing seat 3 is slidably mounted in the groove 23 below the door leaf 2. When the door leaf 2 is installed, the sliding direction of the slider 21 is parallel to the axis of the rotating shaft 5.

[0039] Reference Figure 5 The limiting assembly includes a limiting screw 24, a transmission rod 25, a worm gear 26, and a worm 27. The limiting screw 24 is rotatably disposed within the slide groove 23, and the axial direction of the limiting screw 24 is parallel to the sliding direction of the slider 21. The slider 21 is threadedly engaged with the limiting screw 24. A through hole communicating with the slide groove 23 is provided on the side wall of the door leaf 2. The transmission rod 25 is rotatably disposed within the through hole. The worm gear 26 is coaxially and fixedly connected to the limiting screw 24, and the worm 27 is coaxially and fixedly connected to the transmission rod 25. The worm gear 26 meshes with the worm 27. The side wall of the door leaf 2 is provided with a countersunk groove that communicates with the through hole. A hexagonal block 251 is fixedly provided at the end of the transmission rod 25 away from the worm 27, and the hexagonal block 251 is located in the countersunk groove. The transmission rod 25 is driven to rotate by the hexagonal block 251. The rotation of the transmission rod 25 drives the worm 27 to rotate. The worm 27 drives the worm gear 26 to rotate, which in turn drives the limiting screw 24 to rotate, so that the slider 21 slides along the axial direction of the limiting screw 24 in the sliding groove 23.

[0040] Reference Figure 5 , 6 The length direction of the insertion rod 22 is parallel to the axial direction of the limiting screw 24. Multiple limiting strips 221 are fixedly installed on the side wall of the insertion rod 22, with each limiting strip 221 evenly spaced along the circumference of the insertion rod 22. An insertion hole 55 is formed along the axial direction of the rotating shaft 5, and the insertion hole 55 is adapted to the insertion rod 2. Multiple limiting grooves 56 are formed along the axial direction of the insertion hole 55, with each limiting groove 56 evenly spaced along the circumference of the rotating shaft 5, and each limiting groove 56 corresponds one-to-one with a limiting strip 221. When the load-bearing seat 3, the upper suspension 4, and the door frame 1 are installed... After installation, the door leaf 2 is installed inside the door frame 1 and positioned between the two pivots 5. The insertion rods 22 on the upper and lower sides of the door leaf 2 are accurately aligned with the pivots 5 on the upper and lower sides, respectively. Then, the sliders 21 on the upper and lower sides of the door leaf 2 are driven to slide, so that the insertion rods 22 on the sliders 21 are inserted into the corresponding insertion holes 55 on the pivots, thereby fixing the door leaf 2 to the two pivots 5. In use, the weight of the door leaf 2 is directly applied to the load-bearing seat 3 and the upper suspension 4 through the pivots 5, thereby reducing the stress on the door frame 1 and reducing the possibility of deformation of the door frame 1.

[0041] Reference Figure 5 , 6 The inner wall of the insertion hole 55 is provided with an internal thread, and the internal thread of the insertion hole 55 is connected to a stud 57. The end of the stud 57 is provided with a hexagonal groove 571. During the use of the air-raid shelter door, friction will inevitably occur between the pivot 5 and the load-bearing seat 3 or the upper suspension 4, causing the door leaf 2 to sink. By rotating the stud 57 through the hexagonal groove 571 on the stud 57, the position of the stud 57 can be adjusted. Then, by sliding the insertion rod 22, the insertion rod 22 is pressed against the stud 57, thereby fine-tuning the vertical position of the door leaf 2, avoiding friction between the door leaf 2 and the door frame 1 due to the lower layer, and making the opening and closing of the door leaf 2 smoother.

[0042] Reference Figure 7 , 8 A locking block 28 is fixedly installed on the back of the door leaf 2. A locking groove 12 is opened on the side frame of the door frame 1 for the locking block 28 to be screwed in. A receiving groove is opened on the upper side wall of the locking groove 12 in the vertical direction. An insert block 13 is slidably installed in the receiving groove. An insertion groove 281 is opened on the locking block 28 for the insert block 13 to be inserted. A driving assembly for driving the insert block 13 to slide is provided on the door frame 1. The driving assembly includes a transmission screw 14, a screw sleeve 15 and a driving component. An installation cavity is opened in the side frame of the door frame 1. The transmission screw 14 is rotatably installed in the installation cavity and the axis of the transmission screw 14 is vertical. The screw sleeve 15 is sleeved on the transmission screw 14 and threadedly connected to the transmission screw 14. A connecting groove communicating with the installation cavity is opened on the side wall of the receiving groove along the length direction of the transmission screw 14. A connecting block 131 is fixedly installed on the insert block 13. The connecting block 131 is slidably installed in the connecting groove and fixedly connected to the screw sleeve 15.

[0043] Reference Figure 8 The driving component includes a handle 16, which is rotatably mounted on the door frame 1. A first bevel gear 161 is coaxially fixed on the handle 16 and rotatably mounted in the mounting cavity. A second bevel gear 141 is coaxially fixed on the transmission screw 14, and the first bevel gear 161 meshes with the second bevel gear 141. When the door 2 is closed, the locking block 28 rotates into the locking groove 12 of the door frame 1. By rotating the handle 16, the first bevel gear 161 is driven to rotate, which in turn drives the second bevel gear 141 to rotate, thereby driving the transmission screw 14 to rotate. During the rotation of the transmission screw 14, the screw sleeve 15 is driven to move axially along the transmission screw 14, which in turn drives the insert block 13 to move, so that the insert block 13 is inserted into the insertion groove 281 on the locking block 28, preventing the locking block 28 from disengaging from the locking groove 12, thereby preventing the door 2 from rotating and preventing external personnel from opening the door 2 by damaging the door lock device, thus further increasing the security of the evacuation door.

[0044] The implementation principle of a civil defense protection device for subway engineering according to an embodiment of this application is as follows: By setting up a load-bearing base 3 and an upper suspension 4, during installation, the door leaf 2 is fixed to the pivot 5 on the load-bearing base 3 and the upper suspension 4 respectively. During use, the weight of the door leaf 2 is directly applied to the load-bearing base 3 and the upper suspension 4 through the pivot 5, thereby reducing the force on the door frame 1 and reducing the possibility of deformation of the door frame 1; at the same time, by eliminating the traditional method of connecting the door frame 1 and the door leaf 2 with hinges, the hinges are prevented from being affected by the weight of the door leaf 2. Wear and even deformation can occur, causing the door leaf 2 to shift. Gaps between the door leaf 2 and the door frame 1 are less likely to appear. Furthermore, by setting a load-bearing base 3 and an upper suspension 4, with the load-bearing base 3 embedded in the soil layer at the bottom of the door frame 1 and the upper suspension 4 embedded in the wall at the top of the door frame 1, and the pivots 5 on the load-bearing base 3 and the upper suspension 4 passing through the mounting holes 11 on the upper and lower sides of the door frame 1 respectively, the structural strength of the door frame 1 and the door leaf 2 is greatly increased, and the service life of the air-raid shelter door is improved.

[0045] This application also discloses a method for installing civil defense protection equipment in subway engineering, including the following steps:

[0046] S1. Installation of load-bearing seat 3: Dig a groove in the ground at the bottom of the installation position of the air-raid shelter door, install the load-bearing seat 3 in the groove, and adjust the position of the load-bearing seat 3 so that the rotating shaft 5 on the load-bearing seat 3 is vertical. After the load-bearing seat 3 is installed, fix the load-bearing seat 3 with reinforced concrete.

[0047] S2. Installation of upper suspension 4: Dig a groove in the wall above the installation position of the air defense door, install the upper suspension 4 in the groove dug in the wall, and adjust the position of the upper suspension 4. At the same time, make the pivot 5 on the load-bearing seat 3 coincide with the central axis of the pivot 5 on the upper suspension 4. Then fix the upper suspension 4 with reinforced concrete.

[0048] S3. Installation of door frame 1: Install door frame 1 between load-bearing seat 3 and upper suspension 4, and make the pivot 5 on load-bearing seat 3 and the pivot 5 on upper suspension 4 pass through the mounting holes 11 on the upper and lower sides of door frame 1 respectively. Then, place steel cages between door frame 1 and load-bearing seat 3 and between door frame 1 and upper suspension 4, and set up pouring formwork around door frame 1 to fix door frame 1 with concrete.

[0049] S4. Install the door leaf 2 inside the door frame 1 and between the two rotating shafts 5, and ensure that the insert rods 22 on the upper and lower sides of the door leaf 2 are accurately aligned with the rotating shafts 5 on the upper and lower sides respectively. Then, drive the sliders 21 on the upper and lower sides of the door leaf 2 to slide, so that the insert rods 22 on the sliders 21 are inserted into the corresponding holes 55 on the rotating shafts, thereby fixing the door leaf 2 to the two rotating shafts 5 and making a fine adjustment to the installation position of the door leaf 2.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A civil defense protection device for subway engineering, characterized in that: The system includes a door frame (1), a door leaf (2), a load-bearing base (3), and an upper suspension (4). The load-bearing base (3) is embedded in the soil layer at the bottom of the door frame (1), and the upper suspension (4) is embedded in the wall at the top of the door frame (1). Both the upper suspension (4) and the load-bearing base (3) are rotatably equipped with a pivot (5). The axis of the pivot (5) is vertical. The upper and lower edges of the door frame (1) are provided with mounting holes (11) in the vertical direction. The upper suspension (4) is mounted on... The rotating shaft (5) is rotatably inserted into the mounting hole (11) on the upper side of the door frame (1), and the rotating shaft (5) on the load-bearing seat (3) is rotatably inserted into the mounting hole (11) on the lower side of the door frame (1). The door leaf (2) is set inside the door frame (1) and located between the two rotating shafts (5). The door leaf (2) is respectively provided with a fixing mechanism for fixing the two rotating shafts (5). The door frame (1) is provided with a door lock device for fixing the door leaf (2). Both the upper suspension (4) and the load-bearing seat (3) are fixedly provided with bushings (52). The bushings (52) are sleeved on the rotating shaft (5). A sliding sleeve (53) is slidably sleeved on the bushings (52). A return spring (54) is also sleeved on the bushings (52). The two ends of the return spring (54) on the upper suspension (4) are fixedly connected to the sliding sleeve (53) and the upper suspension (4) respectively. The two ends of the return spring (54) on the load-bearing seat (3) are fixedly connected to the sliding sleeve (53) and the load-bearing seat (3) respectively. The fixing mechanism includes a slider (21) slidably disposed on the door leaf (2), a plug rod (22) fixedly disposed on the slider (21), and a limiting component for preventing the slider (21) from sliding. The door leaf (2) is provided with a groove (23) for the slider (21) to slide. The rotating shaft (5) is provided with a hole (55) along the axial direction of the rotating shaft (5). The hole (55) is adapted to the plug rod (22) and is used for the plug rod (22) to be inserted. The limiting assembly includes a limiting screw (24), a transmission rod (25), a worm gear (26), and a worm (27). The limiting screw (24) is rotatably disposed in the slide groove (23), and the limiting screw (24) is threadedly engaged with the slider (21). The side wall of the door leaf (2) is provided with a through hole communicating with the slide groove (23). The transmission rod (25) is rotatably disposed in the through hole. The worm gear (26) is coaxially fixedly connected to the limiting screw (24), and the worm (27) is coaxially fixedly connected to the transmission rod (25), and the worm gear (26) meshes with the worm (27).

2. The civil defense protection equipment for subway engineering according to claim 1, characterized in that: The side wall of the insertion rod (22) is provided with a plurality of limiting strips (221), and each limiting strip (221) is distributed at equal intervals along the circumference of the insertion rod (22). The side wall of the insertion hole (55) is provided with a plurality of limiting grooves (56) along the axial direction of the rotating shaft (5). The limiting grooves (56) correspond one-to-one with the limiting strips (221) and are used for the insertion of the corresponding limiting strips (221).

3. The civil defense protection equipment for subway engineering according to claim 1, characterized in that: The inner wall of the insertion hole (55) is provided with an internal thread, and a stud (57) is connected to the internal thread of the insertion hole (55). The end of the stud (57) is provided with a hexagonal groove (571), and the stud (57) is used to abut against the insertion rod (22).

4. The civil defense protection equipment for subway engineering according to claim 1, characterized in that: A locking block (28) is fixedly provided on the back of the door leaf (2). A locking groove (12) is provided on the side frame of the door frame (1) for the locking block (28) to be screwed in. A receiving groove is provided on the side wall of the locking groove (12). An insert (13) is slidably provided in the receiving groove. An insertion slot (281) is provided on the locking block (28) for the insert (13) to be inserted. A driving component is provided on the door frame (1) for driving the insert (13) to slide.

5. A civil defense protection device for subway engineering according to claim 4, characterized in that: The drive assembly includes a transmission screw (14), a screw sleeve (15), and a drive component. An installation cavity is provided in the side frame of the door frame (1). The transmission screw (14) is rotatably disposed in the installation cavity. The screw sleeve (15) is sleeved on the transmission screw (14) and threadedly connected to the transmission screw (14). A connecting groove is provided on the side wall of the receiving groove along the length direction of the transmission screw (14). A connecting block (131) is fixedly disposed on the insert (13). The connecting block (131) is slidably disposed in the connecting groove and fixedly connected to the screw sleeve (15). The drive component is used to drive the transmission screw (14) to rotate.

6. A civil defense protection device for subway engineering according to claim 5, characterized in that: The driving component includes a handle (16), which is rotatably mounted on the door frame (1). A first bevel gear (161) is coaxially fixed on the handle (16), and a second bevel gear (141) is coaxially fixed on the transmission screw (14). The first bevel gear (161) meshes with the second bevel gear (141).

7. A method for installing civil defense protection equipment for subway engineering according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Installation of load-bearing seat (3): Install the load-bearing seat (3) in the soil layer at the bottom of the installation position of the air defense door, and adjust the position of the load-bearing seat (3) so that the rotating shaft (5) on the load-bearing seat (3) is vertical. S2. Install the upper suspension (4). Install the upper suspension (4) in the wall at the top of the installation position of the air defense door and adjust the position of the upper suspension (4). At the same time, make the pivot (5) on the load-bearing seat (3) coincide with the central axis of the pivot (5) on the upper suspension (4). S3. Door frame (1) installation: Install the door frame (1) between the load-bearing seat (3) and the upper suspension (4), and make the pivot (5) on the load-bearing seat (3) and the pivot (5) on the upper suspension (4) pass through the mounting holes (11) on the upper and lower sides of the door frame (1) respectively, and then fix the door frame (1). S4. Install the door leaf (2) inside the door frame (1) and between the two pivots (5), and then fix the door leaf (2) to the two pivots (5) respectively.

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