An impact-resistant structure and a blast door

Abstract

This invention discloses an impact-resistant structure and a fire-fighting door, relating to the technical field of impact-resistant structures. It includes an installation frame with several explosion-proof armor plates inside. These armor plates are hexagonal in shape and interconnected, forming a honeycomb-like protective shield within the frame. Each armor plate has six corners. Piston holes are located inside the armor plates at the corner positions. Piston plates slide inside the piston holes, and damping springs are installed inside the piston plates. One end of the damping spring is fixedly connected to the piston plate, and the other end is connected to a first traction explosion-proof steel wire. The first traction explosion-proof steel wires on adjacent armor plates are fixedly connected by a second traction explosion-proof steel wire. This invention provides excellent impact resistance.

Description

Technical Field

[0001] This invention relates to the technical field of impact-resistant structures, and in particular to an impact-resistant structure and a blast door. Background Technology

[0002] Civil defense, also known as civil protection, is an internationally recognized term referring to the government's mobilization and organization of the masses to take measures for air defense, disaster relief, and rescue operations, and to prevent and mitigate the harm of disasters. Civil defense doors are a type of civil defense protective equipment; as the name suggests, they are the doors at the entrances and exits of civil defense projects.

[0003] A utility model with publication number CN211874304U discloses a modular structure air-raid shelter door, including a wall fixing system and an air-raid shelter door structure system. The wall fixing system includes an electromagnetic switch and a wall, wherein the electromagnetic switch is installed on the wall. The air-raid shelter door structure system includes a rotating fixing structure, a rotating head, and an air-raid shelter door main structure. The rotating fixing structure is fixed to the wall, and the air-raid shelter door main structure is connected to the rotating fixing structure through the rotating head and rotates around the rotating fixing structure through the rotating head. The air-raid shelter door main structure is filled with a filling material.

[0004] However, in the above technical solution, the inventors found that the technology has at least the following problems: the main body of the air defense door lacks an impact-resistant structure. When subjected to external impacts such as explosions, the impact force may cause the main body of the air defense door to deform, which does not have a good impact resistance effect and affects normal use. Therefore, an impact-resistant structure and an air defense door are now proposed. Summary of the Invention

[0005] This application provides an impact-resistant structure and a blast door, which has good impact resistance.

[0006] This application provides an impact-resistant structure and a civil defense door, which adopts the following technical solution:

[0007] An impact-resistant structure and a fire-resistant door are disclosed. The impact-resistant structure includes an installation frame. The installation frame contains several explosion-proof armor plates, each a regular hexagonal structure, which are spliced ​​together to form a honeycomb-shaped protective shield within the installation frame. Each explosion-proof armor plate has six corners. Piston holes are located inside each explosion-proof armor plate at the corner positions. A piston plate is slidably mounted inside the piston hole. A damping spring is located inside the piston plate. One end of the damping spring is fixedly connected to the piston plate, and the other end of the damping spring is provided with a first traction explosion-proof steel wire. The first traction explosion-proof steel wires on adjacent explosion-proof armor plates are fixedly connected by a second traction explosion-proof steel wire.

[0008] By adopting the above technical solution, this solution incorporates explosion-proof armor inside the installation frame. The explosion-proof armor, composed of hexagonal structures, is spliced ​​together to form a honeycomb-like protective shield, effectively dispersing and absorbing impact forces, thereby improving the structure's impact resistance. Furthermore, adjacent explosion-proof armor sections are fixedly connected by a first and second traction explosion-proof steel wire, effectively increasing the overall stability of the protective shield and preventing displacement or deformation during impacts. A piston plate and damping spring are slidably installed inside the piston holes, absorbing impact energy and vibration, reducing damage to the internal structure and personnel. In summary, through a structure modeled after ancient armor, this impact-resistant structure effectively protects personnel and equipment from explosions and impacts, providing better safety protection and thus exhibiting excellent impact resistance.

[0009] Preferably, the six piston holes are grouped together, and at least two groups of piston holes are provided on the explosion-proof armor.

[0010] By adopting the above technical solution, dividing the piston holes into two groups allows the piston plates and damping springs in each group to work in coordination, increasing the overall structure's ability to absorb impact energy and its impact buffering effect. Dividing the piston holes into two groups also allows for a more balanced structural layout, which helps to evenly distribute impact force and reduces the possibility of any single piston hole or group of piston holes bearing excessive impact load. Furthermore, dividing the piston holes into two groups increases structural stability; the cooperation between the piston plates and damping springs in each group increases the overall structural stiffness and stability, reducing vibration and displacement. Setting the piston holes in two groups also increases the structural reliability and durability; if one piston hole is damaged or malfunctions, the other groups of piston holes can still continue to provide protection, maintaining the overall structural stability. In summary, the advantages of dividing the six piston holes into two groups and setting at least two groups on the explosion-proof armor are increased energy absorption and impact buffering effect, balanced piston hole layout, improved structural stability, and enhanced structural reliability and durability.

[0011] Preferably, the explosion-proof armor has a cavity at its center that communicates with the piston hole. A fixed shaft is provided inside the cavity of the explosion-proof armor, and a rotating cylinder is rotatably mounted on the fixed shaft. The fixed shaft and the rotating cylinder are connected by a spring. The radial surface of the rotating cylinder has several outwardly extending shafts. The inside of each outwardly extending shaft has a mounting hole, and a locking head is provided inside the mounting hole of the outwardly extending shaft. The locking head and the piston plate are connected by a third traction explosion-proof steel wire.

[0012] By adopting the above technical solution, and using a structure of fixed shaft, rotating drum, and spring, when subjected to impact or external force, the spring automatically resets the rotating drum to its original position via the fixed shaft. This automatic reset function allows the explosion-proof armor to quickly return to normal working condition, improving its continuous protection capability. By adjusting the tension of the spring, the reset speed and damping effect of the rotating drum can be flexibly controlled to adapt to different impact forces. At the same time, the number and position of the extended shafts can be designed and adjusted as needed, increasing the adjustability and adaptability of the explosion-proof armor.

[0013] Preferably, a limiting roller is rotatably provided inside the cavity of the explosion-proof armor, and the radial surface of the limiting roller is recessed inward to form a recessed part for the third traction explosion-proof steel wire to pass through.

[0014] By adopting the above technical solution, the friction and wear between the limiting roller recess and the third traction explosion-proof steel wire can be reduced through their cooperation. This can extend the service life of the explosion-proof armor and increase the reliability and durability of the structure. The limiting roller recess provides a fixed channel to ensure the accurate positioning of the third traction explosion-proof steel wire in the cavity of the explosion-proof armor. This can ensure that the connection between the third traction explosion-proof steel wire and other structures is firm and stable, so as to achieve effective impact absorption and buffering functions.

[0015] Preferably, the mounting frame is internally fixedly connected to a fixed support column, and a first connecting rod is hinged to the fixed support column. One end of the first connecting rod is rotatably connected to the fixed support column, and the other end of the first connecting rod is hinged to a first docking block. A second connecting rod is rotatably connected to the first docking block, and one end of the second connecting rod is hinged to the first docking block. The other end of the second connecting rod is connected to an explosion-proof plate, and the explosion-proof plate is movably located within the mounting frame.

[0016] By adopting the above technical solution, through the mutual linkage and cooperation between the first connecting rod, the first docking block and the second connecting rod, the explosion-proof plate, as part of the installation frame, can be movably located within the installation frame. This design can absorb and dampen external impacts and vibrations, protect the equipment or load within the installation frame from damage, and further play a protective and explosion-proof role before external forces are transmitted to the protective shield.

[0017] Preferably, a fixing panel is fixedly provided inside the mounting frame, and a number of buffer springs are provided between the fixing panel and the explosion-proof plate.

[0018] By adopting the above technical solution, the buffer spring can play the role of shock absorption and vibration reduction; when subjected to external impact or vibration, the buffer spring can absorb and disperse this energy, reducing its impact on the mounting frame and equipment; this helps to protect the equipment or load within the mounting frame and reduce the risk of damage.

[0019] Preferably, the first docking block is provided with a buffer sleeve, the buffer sleeve is provided with a piston rod inside, and a sealed hydraulic cavity is formed between the internal cavity of the buffer sleeve and one end of the piston rod. The other end of the piston rod is provided with a second docking block, and a third connecting rod and a fourth connecting rod are rotatably provided on the second docking block. The other end of the third connecting rod is hinged to a fixed support, and the other end of the fourth connecting rod is hinged to an explosion-proof plate.

[0020] By adopting the above technical solution, when encountering external impacts or vibrations, the hydraulic cavity of the piston rod and buffer sleeve can play a role in shock absorption and shock reduction; by compressing and releasing the liquid in the hydraulic cavity, the transmission of impact and vibration can be reduced, thereby protecting the mounting frame and equipment; the hinged connection of the explosion-proof plate allows the explosion-proof plate to rotate and release energy quickly when subjected to severe impacts or explosions; this helps to protect the mounting frame and equipment from damage by external impacts, thereby improving overall safety.

[0021] Preferably, a civil defense door with an impact-resistant structure includes a door frame, a door panel inside the door frame, and a mounting frame positioned inside the door frame, with the door panel located on one side of the mounting frame.

[0022] By adopting the above technical solution, the door panel is located on one side of the mounting frame, which can provide better impact resistance. When the door is impacted by external force, the door panel can support and disperse the impact force, preventing damage to the mounting frame. The impact-resistant structure of the air-raid shelter door can effectively prevent different types of impacts and attacks. Whether it is an accidental collision, malicious damage or an explosive impact, the structure can reduce the impact force and prevent the door from cracking or deforming, improve security, and ensure the safety of people and property.

[0023] Preferably, the door frame is provided with a door sleeve, and the mounting frame is installed inside the door sleeve.

[0024] By adopting the above technical solution and by setting a door frame, the installation frame can be effectively sealed inside the door frame, further ensuring the stability of the impact-resistant structure inside the door frame.

[0025] Preferably, a shock-absorbing pad is provided between the door frame and the mounting frame.

[0026] By adopting the above technical solution, the shock-absorbing pads installed between the door frame and the mounting frame have a good buffering effect, further ensuring the protective effect.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. This impact-resistant structure, through the installation of explosion-proof armor inside the frame, with hexagonal explosion-proof armor pieces spliced ​​together to form a honeycomb-shaped protective shield, can effectively disperse and absorb impact forces, thereby improving the structure's impact resistance. Furthermore, adjacent explosion-proof armor pieces are fixedly connected by a first and second traction explosion-proof steel wire, effectively increasing the overall stability of the protective shield and preventing displacement or deformation during impact. A piston plate and damping spring sliding inside the piston hole can absorb impact energy and vibration, reducing damage to the internal structure and personnel. In summary, through a structure modeled after ancient armor, this impact-resistant structure can effectively protect personnel and equipment from explosions and impacts, providing better safety protection and thus exhibiting excellent impact resistance.

[0029] 2. This air-raid shelter door with an impact-resistant structure provides better impact resistance by having a door panel located on one side of the mounting frame. When the door is subjected to external impact, the door panel can support and disperse the impact force, preventing damage to the mounting frame. The impact-resistant structure of the air-raid shelter door can effectively prevent different types of impacts and attacks. Whether it is an accidental collision, malicious damage, or an explosive impact, this structure can reduce the impact force and prevent the door from cracking or deforming, improving security and ensuring the safety of personnel and property. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the impact-resistant structure in this embodiment;

[0031] Figure 2 This is a cross-sectional view of the connection structure between two adjacent explosion-proof armor plates in this embodiment;

[0032] Figure 3 This is a cross-sectional view of the exploded structure between the fixed shaft and the explosion-proof armor in this embodiment;

[0033] Figure 4 This is a schematic diagram of the exploded structure between the explosion-proof plate and the mounting frame in this embodiment;

[0034] Figure 5 This is a partial cross-sectional view of the explosion-proof plate in this embodiment;

[0035] Figure 6 This is an overall cross-sectional view of the air-raid shelter door with an impact-resistant structure in this embodiment;

[0036] Explanation of reference numerals in the attached drawings: 1. Mounting frame; 2. Explosion-proof armor; 3. Protective shield; 4. Piston hole; 5. Piston plate; 6. Damping spring; 7. First traction explosion-proof steel wire; 8. Second traction explosion-proof steel wire; 9. Cavity; 10. Fixed shaft; 11. Rotary drum; 12. Clock spring; 13. Outer shaft; 14. Mounting hole; 15. Locking head; 16. Third traction explosion-proof steel wire; 17. Limiting roller; 18. Fixed support column; 19. First connecting rod; 20. First docking block; 21. Second connecting rod; 22. Explosion-proof plate; 23. Fixed panel; 24. Buffer spring; 25. Buffer sleeve; 26. Piston rod; 27. Second docking block; 28. Third connecting rod; 29. ​​Fourth connecting rod; 30. Door frame; 31. Door panel; 32. Door casing; 33. Shock-absorbing pad; Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] This invention discloses an impact-resistant structure and a blast door, such as Figure 1 and Figure 2As shown, the impact-resistant structure includes a mounting frame 1. Inside the mounting frame 1 are several explosion-proof armor plates 2. These explosion-proof armor plates 2 are hexagonal in shape and are spliced ​​together to form a honeycomb-shaped protective shield 3 inside the mounting frame 1. Each explosion-proof armor plate 2 has six corners. Inside each explosion-proof armor plate 2, at the corner positions, are piston holes 4. Piston plates 5 slide inside the piston holes 4. Inside each piston plate 5 are damping springs 6. One end of the damping spring 6 is fixedly connected to the piston plate 5, and the other end of the damping spring 6 is provided with a first traction explosion-proof steel wire 7. The first traction explosion-proof steel wires 7 on adjacent explosion-proof armor plates 2 are fixedly connected by second traction explosion-proof steel wires 8. The solution incorporates explosion-proof armor 2 within the mounting frame 1. These hexagonal explosion-proof armor 2 units are interlocked to form a honeycomb-shaped protective shield 3, effectively dispersing and absorbing impact forces, thus improving the structure's impact resistance. Adjacent explosion-proof armor 2 units are fixedly connected by a first traction explosion-proof steel wire 7 and a second traction explosion-proof steel wire 8, effectively increasing the overall stability of the protective shield 3 and preventing displacement or deformation during impacts. A piston plate 5 and a damping spring 6 are slidably installed inside the piston hole 4, absorbing impact energy and vibration, reducing damage to the internal structure and personnel. In summary, this solution utilizes a structure reminiscent of ancient armor. This impact-resistant structure effectively protects personnel and equipment from explosions and impacts, providing better safety protection. Six piston holes 4 are grouped together, and at least two groups of piston holes 4 are provided on the explosion-proof armor 2. By dividing the piston holes 4 into two groups, the piston plates 5 and damping springs 6 in each group can work in coordination, increasing the overall structure's ability to absorb impact energy and its impact buffering effect. Dividing the piston holes 4 into two groups allows for a more balanced structural layout. This helps to evenly distribute impact force and reduces the possibility of any single piston hole 4 or group of piston holes 4 bearing excessive impact load. By dividing the piston holes 4 into two groups, it is possible to achieve a more balanced layout. To increase structural stability; the interaction between the piston plate 5 and damping spring 6 in each set of piston holes 4 can increase the overall structural stiffness and stability, and reduce vibration and displacement; setting the piston holes 4 into two sets can increase the structural reliability and durability; if one piston hole 4 is damaged or malfunctions, the piston holes 4 in other sets can still continue to play a protective role and maintain the overall structural stability; in short, the advantage of dividing the six piston holes 4 into two sets and setting at least two sets on the explosion-proof armor 2 is that it increases the energy absorption and impact buffering effect of the structure, balances the layout of the piston holes 4, improves the structural stability, and enhances the structural reliability and durability.

[0039] like Figure 2 and Figure 3As shown, a cavity 9 communicating with the piston hole 4 is provided at the center of the explosion-proof armor 2. A fixed shaft 10 is provided inside the cavity 9 of the explosion-proof armor 2, and a rotating cylinder 11 is rotatably mounted on the fixed shaft 10. The fixed shaft 10 and the rotating cylinder 11 are connected by a spring 12. Several outwardly extending shafts 13 are provided on the radial surface of the rotating cylinder 11. The inside of the outwardly extending shafts 13 is provided with mounting holes 14. Locking heads 15 are provided in the mounting holes 14 of the outwardly extending shafts 13. The locking heads 15 and the piston plate 5 are connected by a third traction explosion-proof steel wire 16. By using the fixed shaft 10 and the rotating cylinder 11, a cavity 9 communicating with the piston hole 4 is provided. The structure of the spring 11 and the clock spring 12 allows the rotating drum 11 to automatically return to its original position via the fixed shaft 10 when subjected to impact or external force. This automatic reset function enables the explosion-proof armor 2 to quickly return to its normal working state, improving its continuous protection capability. By adjusting the tightness of the spring 12, the reset speed and damping effect of the rotating drum 11 can be flexibly controlled to adapt to different impact forces. At the same time, the number and position of the extended shafts 13 can be designed and adjusted as needed, increasing the adjustability and adaptability of the explosion-proof armor 2.

[0040] like Figure 3 As shown, a limiting roller 17 is rotatably provided inside the cavity 9 of the explosion-proof armor 2. The radial surface of the limiting roller 17 is recessed inward to form a recessed portion for the third traction explosion-proof steel wire 16 to pass through. Through the cooperation between the recessed portion of the limiting roller 17 and the third traction explosion-proof steel wire 16, friction and wear between them can be reduced. This can extend the service life of the explosion-proof armor 2 and increase the reliability and durability of the structure. The recessed portion of the limiting roller 17 provides a fixed channel to ensure the accurate position of the third traction explosion-proof steel wire 16 in the cavity 9 of the explosion-proof armor 2. This can ensure that the connection between the third traction explosion-proof steel wire 16 and other structures is firm and stable, so as to achieve effective impact absorption and buffering functions.

[0041] like Figure 4 and Figure 5 As shown, a fixed support column 18 is fixedly connected inside the mounting frame 1. A first connecting rod 19 is hinged to the fixed support column 18. One end of the first connecting rod 19 is rotatably connected to the fixed support column 18, and the other end of the first connecting rod 19 is hinged to a first docking block 20. A second connecting rod 21 is rotatably connected to the first docking block 20. One end of the second connecting rod 21 is hinged to the first docking block 20, and the other end of the second connecting rod 21 is connected to an explosion-proof plate 22. The explosion-proof plate 22 is movably located within the mounting frame 1. Through the mutual linkage and cooperation between the first connecting rod 19, the first docking block 20, and the second connecting rod 21, the explosion-proof plate 22, as part of the mounting frame 1, can be movably located within the mounting frame 1. This design can absorb and dampen external impacts and vibrations, protecting the equipment or loads within the mounting frame 1 from damage. Before external forces are transmitted to the protective shield 3, it can further play a protective and explosion-proof role.

[0042] like Figure 5 As shown, a fixed panel 23 is fixedly installed inside the mounting frame 1, and several buffer springs 24 are provided between the fixed panel 23 and the explosion-proof plate 22. The buffer springs 24 can absorb impact and dampen vibration. When subjected to external impact or vibration, the buffer springs 24 can absorb and disperse this energy, reducing its impact on the mounting frame 1 and the equipment. This helps to protect the equipment or load inside the mounting frame 1 and reduce the risk of damage.

[0043] like Figure 5 As shown, a buffer sleeve 25 is provided on the first docking block 20, and a piston rod 26 is provided inside the buffer sleeve 25. A closed hydraulic cavity is formed between the internal cavity of the buffer sleeve 25 and one end of the piston rod 26. A second docking block 27 is provided at the other end of the piston rod 26. A third connecting rod 28 and a fourth connecting rod 29 are rotatably provided on the second docking block 27. The other end of the third connecting rod 28 is hinged to the fixed support column 18, and the other end of the fourth connecting rod 29 is hinged to the explosion-proof plate 22. When encountering external impact or vibration, the hydraulic cavity of the piston rod 26 and the buffer sleeve 25 can play the role of shock absorption and impact reduction. By compressing and releasing the liquid in the hydraulic cavity, the transmission of impact and vibration can be reduced, thereby protecting the mounting frame 1 and the equipment. The hinged connection of the explosion-proof plate 22 allows the explosion-proof plate 22 to rotate and release energy quickly when subjected to severe impact or explosion. This helps to protect the mounting frame 1 and the equipment from external impact damage, thereby improving overall safety.

[0044] A fire-resistant door with an impact-resistant structure includes a door frame 30, a door panel 31 inside the door frame 30, and a mounting frame 1 positioned within the door frame 30. The door panel 31 is located on one side of the mounting frame 1. The door panel 31's location on one side of the mounting frame 1 provides better impact resistance. When the door is subjected to external impact, the door panel 31 can support and disperse the impact force, preventing damage to the mounting frame 1. The impact-resistant structure of the fire-resistant door can effectively prevent different types of impacts and attacks. Whether it is an accidental collision, malicious damage, or an explosive impact, this structure can reduce the impact force and prevent the door from cracking or deforming, improving security and ensuring the safety of personnel and property.

[0045] A door frame 30 is provided with a door sleeve 32, and the mounting frame 1 is installed inside the door sleeve 32. By providing the door sleeve 32, the mounting frame 1 can be well sealed inside the door frame 30, further ensuring the stability of the impact-resistant structure inside the door sleeve 32. A shock-absorbing pad 33 is provided between the door sleeve 32 and the mounting frame 1. The shock-absorbing pad 33 provided between the door sleeve 32 and the mounting frame 1 has a good buffering effect, further ensuring the protective effect.

[0046] Working principle: During use, the air-raid shelter door with an impact-resistant structure is installed by positioning the mounting frame 1 inside the door frame 30, and the door sleeve 32 is used to fix the mounting frame 1 inside the door frame 30.

[0047] When an external force impacts the air-raid shelter door, the door panel 31 acts as the first line of defense, effectively resisting the force. When the first line of defense is breached, the explosion-proof plate 22 acts as the second line of defense, providing excellent impact resistance. The protective shield 3, as the third line of defense, is formed by interlocking hexagonal explosion-proof armor plates 2 to create a honeycomb-like structure. This effectively disperses and absorbs the impact force, thus improving the structure's impact resistance. Adjacent explosion-proof armor plates 2 are fixedly connected by the first and second traction explosion-proof steel wires 7 and 8, effectively increasing the overall stability of the protective shield 3, preventing displacement or deformation during impact, and blocking debris generated by the impact of the first and second lines of defense, preventing debris from flying and thus protecting users. A piston plate 5 and a damping spring 6 are slidably installed inside the piston hole 4 to absorb impact energy and vibration, reducing damage to the internal structure and personnel. In summary, through its structure resembling ancient armor, this impact-resistant structure effectively protects personnel and equipment from explosions and impacts, providing better safety protection.

[0048] 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. An impact-resistant structure, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a number of explosion-proof armors (2) inside. The explosion-proof armors (2) are hexagonal structures and are spliced ​​together to form a honeycomb-shaped protective shield (3) inside the mounting frame (1). The explosion-proof armors (2) are provided with six corners. The explosion-proof armors (2) are provided with piston holes (4) inside and at the corner positions. The piston plates (5) are slidably provided inside the piston holes (4). The piston plates (5) are provided with damping springs (6) inside. One end of the damping springs (6) is fixedly connected to the piston plates (5). The other end of the damping springs (6) is provided with a first traction explosion-proof steel wire (7). The first traction explosion-proof steel wires (7) on adjacent explosion-proof armors (2) are fixedly connected by a second traction explosion-proof steel wire (8). The explosion-proof armor (2) has a cavity (9) at its center that communicates with the piston hole (4). A fixed shaft (10) is provided in the cavity (9) of the explosion-proof armor (2). A rotating cylinder (11) is rotatably mounted on the fixed shaft (10). The fixed shaft (10) and the rotating cylinder (11) are connected by a spring (12). The radial surface of the rotating cylinder (11) is provided with several outwardly extending shafts (13). The inside of the outwardly extending shafts (13) is provided with mounting holes (14). A locking head (15) is provided in the mounting holes (14) of the outwardly extending shafts (13). The locking head (15) and the piston plate (5) are connected by a third traction explosion-proof steel wire (16). The explosion-proof armor (2) has a limiting roller (17) rotatably installed in the cavity (9). The radial surface of the limiting roller (17) is recessed inward to form a recessed part for the third traction explosion-proof steel wire (16) to pass through. The mounting frame (1) is internally fixedly connected to a fixed support column (18). A first connecting rod (19) is hinged on the fixed support column (18). One end of the first connecting rod (19) is rotatably connected to the fixed support column (18). The other end of the first connecting rod (19) is hinged to a first docking block (20). A second connecting rod (21) is rotatably connected to the first docking block (20). One end of the second connecting rod (21) is hinged to the first docking block (20). The other end of the second connecting rod (21) is connected to an explosion-proof plate (22). The explosion-proof plate (22) is movably located inside the mounting frame (1). The mounting frame (1) is internally fixed with a fixing panel (23), and a plurality of buffer springs (24) are provided between the fixing panel (23) and the explosion-proof plate (22); The first docking block (20) is provided with a buffer sleeve (25), and the buffer sleeve (25) is provided with a piston rod (26) inside. A closed hydraulic cavity is formed between the internal cavity of the buffer sleeve (25) and one end of the piston rod (26). The other end of the piston rod (26) is provided with a second docking block (27). The second docking block (27) is rotatably provided with a third connecting rod (28) and a fourth connecting rod (29). The other end of the third connecting rod (28) is hinged to the fixed support (18), and the other end of the fourth connecting rod (29) is hinged to the explosion-proof plate (22).

2. The impact-resistant structure according to claim 1, characterized in that: The six piston holes (4) are grouped together, and at least two groups of piston holes (4) are provided on the explosion-proof armor (2).

3. A fire-resistant door with the impact-resistant structure described in any one of claims 1-2, characterized in that: Includes a door frame (30), inside which a door panel (31) is provided, and a mounting frame (1) is positioned and installed inside the door frame (30), with the door panel (31) located on one side of the mounting frame (1).

4. The air-raid shelter door according to claim 3, characterized in that: The door frame (30) is provided with a door sleeve (32), and the mounting frame (1) is installed inside the door sleeve (32).

5. The air-raid shelter door according to claim 4, characterized in that: A shock-absorbing pad (33) is provided between the door frame (32) and the mounting frame (1).

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