Anti-seismic heat-insulating civil defense door

Abstract

This invention relates to the field of earthquake-resistant and heat-insulating air-raid shelter doors, and discloses an earthquake-resistant and heat-insulating air-raid shelter door, including a wall surface. An air-insulating door is installed on the outer side of the wall surface. The bottom surface of the wall surface is fixedly connected to the ground. A hanging mechanism and a ground-insertion mechanism are fixedly connected to the front of the air-insulating door. The hanging mechanism includes a fixing block, with two first springs fixedly connected to the outer surface of the fixing block. Four limiting blocks are fixedly connected to the front of the air-insulating door. A push rod is slidably connected to the inner wall of each set of limiting blocks. The end of the push rod near the first spring is fixedly connected to the outer surface of the first spring. An electric induction valve is fixedly connected to the front of the air-insulating door. A hook is rotatably connected to the inner wall of one of the push rods, and the outer surface of the hook is rotatably connected to the inner wall of the air-insulating door. A mounting base is fixedly connected to the front of the wall surface. This earthquake-resistant and heat-insulating air-raid shelter door has good earthquake resistance and heat insulation effects, which can extend the service life of the air-raid shelter door.

Description

Technical Field

[0001] This invention relates to the field of earthquake-resistant and heat-insulating civil defense door technology, specifically to an earthquake-resistant and heat-insulating civil defense door. Background Technology

[0002] Civil defense works, also known as civil defense fortifications, refer to underground protective structures built independently to ensure the shelter of personnel and materials, command of civil air defense, and medical rescue during wartime, as well as basements built in conjunction with above-ground buildings that can be used for air defense during wartime. Civil defense works are important facilities for preventing sudden enemy attacks, effectively sheltering personnel and materials, and preserving war potential. They are engineering guarantees for persisting in urban combat and supporting the long-term anti-aggression war until victory.

[0003] According to announcement number CN112796633A, a type of air-raid shelter door is disclosed, including a door frame and a door leaf. The door leaf is hinged to the door frame, and a closed structure is provided between the door frame and the door leaf. The door leaf has a groove around its perimeter, and a receiving groove is provided on the upper side of the door frame. A horizontally arranged water-absorbing pad plate that can be inserted into the groove on one side is slidably connected in the receiving groove. A water tank is fixedly installed on the upper side of the door leaf. Water guide pipes are vertically fixedly connected to both ends of the water tank corresponding to the water-absorbing pad plate. Water outlets are provided on the side of the water guide pipes near the water-absorbing pad plate. A rotating shaft is rotatably connected to the upper side of the water guide pipe corresponding to the water outlet. A valve plate is fixedly connected to the rotating shaft. Sliding grooves are provided at both ends of the water-absorbing pad plate along the horizontal direction. A connecting rod that is slidably connected in the sliding groove is fixedly connected to the end of each rotating shaft. A temperature-sensing glass bulb is installed inside the door frame.

[0004] The above technical solution can effectively prevent the penetration of dense smoke. However, although it can isolate dense smoke, it does not have earthquake resistance. In actual use, air-raid shelter doors should also have a certain degree of earthquake resistance. In areas with frequent aftershocks, the main support structure of the air-raid shelter door may be damaged by the vibrations of aftershocks. If there are many aftershocks, there may be certain safety hazards. If hazards are frequently found and repairs are needed, the heavy weight and large size of the air-raid shelter door will make repairs inconvenient and time-consuming. Therefore, it is necessary to add earthquake resistance to the air-raid shelter door. Summary of the Invention

[0005] The purpose of this invention is to provide a shock-resistant and heat-insulating fire door to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a shock-resistant and heat-insulating air defense door, including a wall surface, an insulated door provided on the outer side of the wall surface, a ground fixedly connected to the bottom surface of the wall surface, a hanging mechanism fixedly connected to the front of the insulated door, and a ground insertion mechanism fixedly connected to the front of the insulated door.

[0007] The hanging mechanism includes a fixing block, two first springs are fixedly connected to the outer surface of the fixing block, four limiting blocks are fixedly connected to the front of the door, a push rod is slidably connected to the inner wall of each set of limiting blocks, the end of the push rod near the first spring is fixedly connected to the outer surface of the first spring, an electric induction valve is fixedly connected to the front of the door, a hook is rotatably connected to the inner wall of one of the push rods, the outer surface of the hook is rotatably connected to the inner wall of the door, a mounting base is fixedly connected to the front of the wall, a hook rod is fixedly connected to the bottom surface of the mounting base, and the outer surface of the hook is in contact with the outer surface of the hook rod.

[0008] The ground insertion mechanism includes a locking seat, a locking post slidably connected to the inner wall of the locking seat, a buffer fixedly connected to the bottom surface of the locking post, the outer surface of the buffer contacting the inner wall of the ground, and the bottom surface of another push rod contacting the upper surface of the locking post. Four second springs are fixedly connected to the inner wall of the locking seat, and a resistance block is fixedly connected to one end of each group of second springs that are close to each other. A toggle rod is fixedly connected to the upper surface of each resistance block. A cover plate is provided above the locking seat, the bottom surface of the cover plate contacting the upper surface of the locking seat, and four bolts are provided above the cover plate. The bottom end of each bolt penetrates the cover plate and is connected to the internal thread of the locking seat.

[0009] Preferably, an L-shaped seat is fixedly connected to the back of the door, and a worm gear is rotatably connected to the inner wall of the L-shaped seat.

[0010] Preferably, three limiting brackets are fixedly connected to the back of the insulation door, wherein the inner walls of two of the limiting brackets are rotatably connected to a worm gear.

[0011] Preferably, the inner wall of the worm gear is threaded with a threaded rod, and the outer surface of the threaded rod is slidably connected to the inner wall of another limiting frame.

[0012] Preferably, a manual rotating wheel is fixedly connected to both the front and back of the worm gear, with one of the manual rotating wheels located on the front of the door and the other manual rotating wheel located on the back of the door.

[0013] Preferably, the end of the threaded rod away from the limiting frame is rotatably connected to two drive rods, and each drive rod is rotatably connected to a pin rod at the end away from the threaded rod.

[0014] Preferably, each of the pins has two limiting seats slidably connected to its outer surface, and the front of each limiting seat is fixedly connected to the back of the door insulation panel.

[0015] Preferably, a positioning block is provided on the outer side of the insulation door, and the front of the positioning block is fixedly connected to the back of the insulation door.

[0016] Preferably, a sealing strip is fixedly connected to the back of the insulation door, and a sealing groove is fixedly connected to the front of the wall, with the outer surface of the sealing strip in contact with the inner wall of the sealing groove.

[0017] Preferably, two rotating seats are fixedly connected to the front of the wall, and a rotating frame is rotatably connected to the outer surface of each rotating seat. The right side of each of the two rotating frames is fixedly connected to the left side of the door.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] Firstly, this invention uses a fixing block to secure two first springs. Two push rods are respectively engaged with the electric induction valve in two directions. The engagement of the push rods with the electric induction valve stores the force of the first springs. Two limiting blocks limit one push rod, ensuring that the push rod will not deviate from its direction when moving. A mounting base is used to fix the hook rod, ensuring its stability. If aftershocks occur, the electric induction valve is triggered to retract the stop block, thereby releasing the push rod. The restoring force of the first spring pushes the push rod to move. At this time, the push rod is pushed horizontally by the first spring. The push rod drives the bottom end of the hook to move. Utilizing the rotational connection between the hook and the insulation door, the entire hook rotates around the center position. At this time, it can cooperate with the hook rod to form a hook-and-loop relationship, thereby lifting the entire insulation door and playing a role in auxiliary stability, thus mitigating the damage caused by aftershocks to the insulation door.

[0020] Secondly, this invention enhances the overall stability of the insulation door by incorporating a ground-insertion mechanism. The locking seat secures four second springs, which in turn limit the movement of the resistance blocks. When not in operation, the locking post is located inside the locking seat, holding the four resistance blocks in place. At this time, all four second springs are compressed and stored. If the electric induction valve triggers and releases the push rod, the restoring force of the first spring pushes the push rod forward. The push rod is then pushed downwards by the first spring, pushing the locking post downwards until it passes the four resistance blocks. The four second springs then release their pressure, pushing the resistance blocks out. The four resistance blocks firmly hold the locking post in place. The locking post, along with the buffer, moves downwards, engaging with the inner wall of the ground. This allows the ground-insertion mechanism to connect with the ground, enhancing the stability of the insulation door. If aftershocks occur, the buffer, located inside the ground, prevents it from shaking and also provides cushioning, reducing the damage caused by aftershocks to the insulation door. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the wall surface of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the rear view of the insulated door of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the bottom right view of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the fixing block of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the mounting base of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the card holder of the present invention;

[0027] Figure 7 This is a three-dimensional structural diagram of the resistance block of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the positioning block of the present invention from the rear view;

[0029] Figure 9 This is a three-dimensional structural diagram of the threaded rod of the present invention from the rear view.

[0030] The components are as follows: 1. Wall; 2. Insulation door; 3. Ground; 4. Hanging mechanism; 401. Fixing block; 402. First spring; 403. Electric induction valve; 404. Push rod; 405. Limiting block; 406. Mounting seat; 407. Hook rod; 408. Hook; 5. Ground insertion mechanism; 501. Snap-fit ​​seat; 502. Snap-fit ​​post; 503. Buffer; 504. Second spring; 505. Resistance block; 506. Actuating rod; 507. Cover plate; 508. Bolt; 6. L-shaped seat; 7. Worm gear; 8. Limiting frame; 9. Worm wheel; 10. Threaded rod; 11. Manual rotating wheel; 12. Drive rod; 13. Pin rod; 14. Limiting seat; 15. Positioning block; 16. Sealing strip; 17. Sealing groove; 18. Rotating seat; 19. Rotating frame. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Please see Figure 1-9An earthquake-resistant and heat-insulating air defense door includes a wall 1, an insulated door 2 installed on the outer side of the wall 1, a ground 3 fixedly connected to the bottom surface of the wall 1, a hanging mechanism 4 fixedly connected to the front of the insulated door 2, and a ground plug mechanism 5 fixedly connected to the front of the insulated door 2.

[0034] The hanging mechanism 4 includes a fixing block 401, two first springs 402 are fixedly connected to the outer surface of the fixing block 401, four limiting blocks 405 are fixedly connected to the front of the door 2, and a push rod 404 is slidably connected to the inner wall of each set of limiting blocks 405. The end of the push rod 404 near the first spring 402 is fixedly connected to the outer surface of the first spring 402. An electric sensing valve 403 is fixedly connected to the front of the door 2. A hook 408 is rotatably connected to the inner wall of one of the push rods 404. The outer surface of the hook 408 is rotatably connected to the inner wall of the door 2. A mounting base 406 is fixedly connected to the front of the wall 1. A hook rod 407 is fixedly connected to the bottom surface of the mounting base 406. The outer surface of the hook 408 is in contact with the outer surface of the hook rod 407.

[0035] An L-shaped seat 6 is fixedly connected to the back of the door 2. A worm 7 is rotatably connected to the inner wall of the L-shaped seat 6. The L-shaped seat 6 is an L-shaped support iron plate that supports the worm 7. The worm 7 refers to a gear with one or more helical teeth that meshes with a worm wheel to form an intersecting shaft gear pair. Its pitch surface can be a cylindrical surface.

[0036] Three limiting frames 8 are fixedly connected to the back of the door 2. Two of the limiting frames 8 have worm gears 9 rotatably connected to their inner walls. The limiting frames 8 are used to limit and fix the worm gears 9, and play a role in stabilizing the worm gears 9. The worm gear 9 and worm 7 mechanism are often used to transmit motion and power between two intersecting shafts. The worm gear 9 and worm 7 are equivalent to gears and racks in their middle plane. The worm 7 is also similar in shape to a screw.

[0037] The inner wall of the worm gear 9 is threaded with a threaded rod 10. The outer surface of the threaded rod 10 is slidably connected to the inner wall of another limit frame 8. When the threaded rod 10 rotates, it plays a role in lateral translation.

[0038] Manual rotating wheels 11 are fixedly connected to both the front and back of the worm gear 7. One manual rotating wheel 11 is located on the front of the door 2, and the other manual rotating wheel 11 is located on the back of the door 2. The worm gear 7 can be driven to rotate by the operator manually rotating the manual rotating wheel 11, thus providing the power source for locking the door 2.

[0039] Two drive rods 12 are rotatably connected to the end of the threaded rod 10 away from the limit frame 8. Each drive rod 12 is rotatably connected to a pin rod 13 at the end away from the threaded rod 10. The up and down swing of the drive rod 12 can drive the pin rod 13 to insert into the wall 1, thereby locking the door 2.

[0040] The specific implementation of this embodiment is as follows: Two first springs 402 are fixed by a fixing block 401. Two push rods 404 are respectively engaged with the electric sensing valve 403 in two directions. The electric sensing valve 403 is an electric valve connected to an earthquake safety alarm. When the earthquake safety alarm is triggered, the electric sensing valve 403 is activated. The internal elastic mechanism of the electric sensing valve 403 retracts the stops in both directions, thereby triggering the push rods 404 to move. The engagement of the push rods 404 with the electric sensing valve 403 stores the force of the first springs 402. Two limiting blocks 405 limit one push rod 404 to ensure that the push rod 404 does not deviate from its original direction during movement. The hook rod 407 is fixed using the mounting base 406 to ensure its stability. If aftershocks occur, the electric sensing valve 403 is triggered to retract the stop block, which releases the push rod 404. The restoring force of the first spring 402 pushes the push rod 404 to move. The push rod 404 is pushed and moved horizontally by the first spring 402. The push rod 404 then moves the bottom end of the hook 408. By utilizing the rotational connection between the hook 408 and the insulation door 2, the hook 408 rotates around its center position. This allows it to cooperate with the hook rod 407 to form a hook-and-loop relationship, thereby lifting the insulation door 2 as a whole and providing auxiliary stability, thus mitigating the damage caused by aftershocks to the insulation door 2.

[0041] Example 2

[0042] Please see Figure 1-9 The ground insertion mechanism 5 includes a locking seat 501, a locking post 502 slidably connected to the inner wall of the locking seat 501, a buffer 503 fixedly connected to the bottom surface of the locking post 502, the outer surface of the buffer 503 contacting the inner wall of the ground 3, and the bottom surface of another push rod 404 contacting the upper surface of the locking post 502. Four second springs 504 are fixedly connected to the inner wall of the locking seat 501. A resistance block 505 is fixedly connected to one end of each group of second springs 504 that is close to each other. A toggle rod 506 is fixedly connected to the upper surface of each resistance block 505. A cover plate 507 is provided above the locking seat 501. The bottom surface of the cover plate 507 is in contact with the upper surface of the locking seat 501. Four bolts 508 are provided above the cover plate 507. The bottom end of each bolt 508 passes through the cover plate 507 and is threadedly connected to the inside of the locking seat 501.

[0043] Two limiting seats 14 are slidably connected to the outer surface of each pin 13. The front of each limiting seat 14 is fixedly connected to the back of the door insulation 2. The limiting seats 14 serve to constrain the pin 13 and further ensure the stability of the pin 13.

[0044] A positioning block 15 is provided on the outside of the door 2. The front of the positioning block 15 is fixedly connected to the back of the door 2. The positioning block 15 prevents the threaded rod 10 from going out of the safe range and plays a role in limiting and standardizing.

[0045] A sealing strip 16 is fixedly connected to the back of the door 2, and a sealing groove 17 is fixedly connected to the front of the wall 1. The outer surface of the sealing strip 16 contacts the inner wall of the sealing groove 17. The cooperation between the sealing strip 16 and the sealing groove 17 can effectively prevent dense smoke from entering the interior of the air-raid shelter door, and has a good sealing effect.

[0046] Two rotating seats 18 are fixedly connected to the front of the wall 1. Each rotating seat 18 has a rotating frame 19 rotatably connected to its outer surface. The right side of the two rotating frames 19 is fixedly connected to the left side of the door 2. The cooperation between the rotating seats 18 and the rotating frames 19 serves as the support point for the main door 2, allowing the door 2 to be rotated and opened / closed.

[0047] The specific implementation of this embodiment is as follows: The overall stability of the door insulation panel 2 is enhanced by the installation of the ground insertion mechanism 5. Four second springs 504 are fixed using the snap-fit ​​base 501, and the second springs 504 limit the movement of the resistance blocks 505. When not in operation, the snap-fit ​​post 502 is located inside the snap-fit ​​base 501, holding the four resistance blocks 505 in place. At this time, all four second springs 504 are compressed and stored. If the electric sensing valve 403 triggers the release of the push rod 404, the restoring force of the first spring 402 pushes the push rod 404 to move. The push rod 404 is then pushed downwards by the first spring 402, at which point the push rod 404 pushes against the snap-fit ​​post 505. 02 moves downwards until the locking post 502 passes the four resistance blocks 505. The four second springs 504 release pressure instantly, pushing the resistance blocks 505 out. The four resistance blocks 505 can firmly lock the locking post 502. At this time, the locking post 502 moves downwards with the buffer 503. The buffer 503 engages with the inner wall of the ground 3, allowing the ground insertion mechanism 5 to connect with the ground 3. This can enhance the stability of the insulation door 2. If an aftershock occurs at this time, the buffer 503, being located inside the ground 3, will not shake. The buffer 503 also has a buffering effect, reducing the damage of aftershocks to the insulation door 2.

[0048] The working principle of this invention is as follows: First, a professional rotates the manual turntable 11, which in turn drives the worm gear 7 to rotate. Utilizing the meshing connection between the worm gear 7 and the worm wheel 9, the rotation of the worm gear 7 drives the worm wheel 9 to rotate. At this time, the worm wheel is limited and fixed by the limiting bracket 8. Utilizing the threaded connection between the worm wheel 9 and the threaded rod 10, the rotation of the worm wheel 9 drives the threaded rod 10 to rotate. The translation of the threaded rod 10 drives the drive rod 12 to move. Utilizing the rotational connection between the drive rod 12 and the pin rod 13, the drive rod 12 can push against the pin rod 13 and insert itself into the wall 1, thus achieving the effect of locking the door 2. Then, a fixing block 401 is provided to fix the two first springs 402. Two push rods 404 are respectively engaged with the electric sensing valve 403 in two directions. This electric sensing valve 403 is an electric valve connected to an earthquake safety alarm. When the earthquake safety alarm sounds, it triggers the electric sensing valve 403. The triggering mechanism inside the electric sensing valve 403 can recover... Two directional stops trigger the movement of the push rod 404. The push rod 404 engages with the electric sensing valve 403 to store the first spring 402. Two limit blocks 405 limit the push rod 404 to prevent it from deviating from its direction during movement. The mounting base 406 secures the hook rod 407, ensuring its stability. If aftershocks occur, the electric sensing valve 403 retracts the stops, releasing the push rod 404. The restoring force of the first spring 402 can push the push rod 404 to move. At this time, the push rod 404 is pushed and moved by the first spring 402. Then, the push rod 404 drives the bottom end of the hook 408 to move. By utilizing the rotational connection between the hook 408 and the insulation door 2, the hook 408 can rotate around the center position. At this time, it can cooperate with the hook rod 407 to form a hook-ring relationship, so that the insulation door 2 can be lifted as a whole, which plays an auxiliary stabilizing role and can alleviate the damage caused by aftershocks to the insulation door 2.

[0049] The overall stability of the door insulation panel 2 is enhanced by the installation of the ground insertion mechanism 5. Four second springs 504 are fixed using the snap-fit ​​base 501, and these springs limit the movement of the resistance blocks 505. When not in operation, the snap-fit ​​post 502 is located inside the snap-fit ​​base 501, holding the four resistance blocks 505 in place. At this time, all four second springs 504 are compressed and stored. If the electric sensing valve 403 triggers and releases the push rod 404, the restoring force of the first spring 402 pushes the push rod 404 to move. The push rod 404 is then pushed downwards by the first spring 402, and in turn, the push rod 404 pushes the snap-fit ​​post 502 downwards. Until the locking post 502 passes through the four resistance blocks 505, the four second springs 504 instantly release pressure and push the resistance blocks 505 out. The four resistance blocks 505 can firmly lock the locking post 502. At this time, the locking post 502 moves downward with the buffer 503. The buffer 503 locks with the inner wall of the ground 3, which allows the ground insertion mechanism 5 to be connected with the ground 3. This can enhance the stability of the insulation door 2. If an aftershock occurs at this time, the buffer 503 is located inside the ground 3, so the buffer 503 itself will not shake. The buffer 503 itself has a buffering function, which reduces the damage of aftershocks to the insulation door 2.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-seismic and heat-insulating civil defense door, comprising a wall surface (1), characterized in that: An insulated door (2) is provided on the outside of the wall (1), a ground (3) is fixedly connected to the bottom surface of the wall (1), a hanging mechanism (4) is fixedly connected to the front of the insulated door (2), and a ground plug mechanism (5) is fixedly connected to the front of the insulated door (2). The hanging mechanism (4) includes a fixing block (401), two first springs (402) are fixedly connected to the outer surface of the fixing block (401), four limiting blocks (405) are fixedly connected to the front of the door (2), and a push rod (404) is slidably connected to the inner wall of each group of limiting blocks (405). The end of the push rod (404) near the first spring (402) is fixedly connected to the outer surface of the first spring (402). An electric sensing valve (403) is fixedly connected to the front of the door (2), and a hook (408) is rotatably connected to the inner wall of one of the push rods (404). The outer surface of the hook (408) is rotatably connected to the inner wall of the door (2). A mounting base (406) is fixedly connected to the front of the wall (1), and a hook rod (407) is fixedly connected to the bottom surface of the mounting base (406). The outer surface of the hook (408) is in contact with the outer surface of the hook rod (407). The ground insertion mechanism (5) includes a locking seat (501), a locking post (502) is slidably connected to the inner wall of the locking seat (501), a buffer (503) is fixedly connected to the bottom surface of the locking post (502), the outer surface of the buffer (503) is in contact with the inner wall of the ground (3), and the bottom surface of another push rod (404) is in contact with the upper surface of the locking post (502). Four second springs (504) are fixedly connected to the inner wall of the locking seat (501). Each set of second springs (504) 04) A resistance block (505) is fixedly connected to each other at one end. A toggle rod (506) is fixedly connected to the upper surface of each resistance block (505). A cover plate (507) is provided above the snap-fit ​​seat (501). The bottom surface of the cover plate (507) is in contact with the upper surface of the snap-fit ​​seat (501). Four bolts (508) are provided above the cover plate (507). The bottom end of each bolt (508) passes through the cover plate (507) and is connected to the internal thread of the snap-fit ​​seat (501).

2. The shock-resistant heat-insulating civil defense door according to claim 1, characterized in that: An L-shaped seat (6) is fixedly connected to the back of the insulated door (2), and a worm gear (7) is rotatably connected to the inner wall of the L-shaped seat (6).

3. The shock-resistant heat-insulating civil defense door according to claim 1, characterized in that: Three limiting frames (8) are fixedly connected to the back of the insulated door (2), and the inner walls of two of the limiting frames (8) are rotatably connected to a worm gear (9).

4. The earthquake-resistant and heat-insulating air-raid shelter door according to claim 3, characterized in that: The inner wall of the worm gear (9) is threaded with a threaded rod (10), and the outer surface of the threaded rod (10) is slidably connected to the inner wall of another limiting frame (8).

5. The shock-resistant heat-insulating civil defense door according to claim 2, characterized in that: The worm gear (7) is fixedly connected to both the front and back sides with manual rotating wheels (11), one of which is located on the front of the door insulation (2) and the other is located on the back of the door insulation (2).

6. The shock-resistant heat-insulating civil defense door according to claim 4, characterized in that: Two drive rods (12) are rotatably connected to the end of the threaded rod (10) away from the limiting frame (8), and each drive rod (12) is rotatably connected to a pin rod (13) at the end away from the threaded rod (10).

7. The shock-resistant heat-insulating civil defense door according to claim 6, characterized in that: Each of the pins (13) has two limiting seats (14) slidably connected to its outer surface, and the front of each limiting seat (14) is fixedly connected to the back of the door insulation (2).

8. The earthquake-resistant and heat-insulating air-raid shelter door according to claim 1, characterized in that: A positioning block (15) is provided on the outside of the door insulation (2), and the front of the positioning block (15) is fixedly connected to the back of the door insulation (2).

9. The shock-resistant heat-insulating civil defense door according to claim 1, characterized in that: A sealing strip (16) is fixedly connected to the back of the insulated door (2), and a sealing groove (17) is fixedly connected to the front of the wall (1). The outer surface of the sealing strip (16) is in contact with the inner wall of the sealing groove (17).

10. The shock-resistant heat-insulating civil defense door according to claim 1, characterized in that: Two rotating seats (18) are fixedly connected to the front of the wall (1). Each rotating seat (18) has a rotating frame (19) rotatably connected to its outer surface. The right side of each rotating frame (19) is fixedly connected to the left side of the door (2).

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