Impact-resistant structure of a steel structure security door

Abstract

The utility model discloses a kind of anti-impact structures of steel structure protective airtight door, it is related to protective airtight door technical field, to solve the problem of insufficient economy in prior art, the inner door plate and outer door plate between protective airtight door are connected by buffer structure, when outer door plate is damaged by impact, it is difficult to replace, must be replaced as a whole, the first well-shaped arrangement reinforcing rib is fixedly connected in the rear end surface of the airtight door main frame, multiple guide columns are fixedly connected in the rear end surface edge rectangle array of the airtight door main frame, fixed frame is connected in the front end of the airtight door main frame and in the front end of multiple guide columns, protective door plate is provided in the rear end of the fixed frame in the airtight door main frame, adopt modular design, the quick replacement of protective door plate is realized by the fixed frame and guide column structure of detachable, when outer door plate is damaged, airtight door does not need to be replaced as a whole, maintenance cost is significantly reduced.

Description

Technical Field

[0001] This utility model relates to the field of protective airtight doors, specifically to an impact-resistant structure for a steel structure protective airtight door. Background Technology

[0002] Protective airtight doors are special doors that combine protection and airtightness, primarily used in high-security locations such as military engineering projects, civil defense facilities, and nuclear power plants. Their core function is to withstand blast waves, nuclear, biological, and chemical contamination, and shrapnel damage, while simultaneously isolating internal and external air, toxic gases, and radioactive dust through a high-strength sealing structure.

[0003] For example, authorization announcement number CN221799597U discloses an impact-resistant structure for a steel structure protective airtight door. This utility model solves the problem of poor buffering effect of existing steel structure protective airtight doors in terms of impact resistance. This utility model utilizes high-strength steel plates, foam plastic boards, and carbon fiber composite boards. The high-strength steel plates inside the outer panel have good strength and toughness, effectively absorbing and dispersing impact energy and reducing the impact on the door body. The foam plastic boards effectively absorb energy from external impacts, reducing the impact on the inner steel plates. The carbon fiber composite boards can bear the main impact force when subjected to impact, protecting the internal structure from damage.

[0004] However, in the above-mentioned technologies, the inner and outer door panels of the protective airtight door are connected by a buffer structure. When the outer door panel is damaged by impact, it is difficult to replace and the whole door must be replaced, which is not economical. Therefore, the market urgently needs to develop an impact-resistant structure for steel structure protective airtight doors to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide an impact-resistant structure for a steel structure protective airtight door, in order to solve the problem mentioned in the background art that in the prior art, the inner and outer door panels of the protective airtight door are connected by a buffer structure, and when the outer door panel is damaged by impact, it is difficult to replace it and the whole door must be replaced, which is not economical.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an impact-resistant structure for a steel structure protective airtight door, comprising an airtight door main frame, wherein a first grid-shaped arrangement of reinforcing ribs is fixedly connected to the rear end face of the main frame, and multiple guide posts are fixedly connected to the rectangular array edge of the rear end face of the main frame, wherein a fixed frame is connected to the front end of the main frame and to the front end of the multiple guide posts, wherein a protective door panel is provided at the rear end of the fixed frame, and a second grid-shaped arrangement of reinforcing ribs is fixedly connected to the rear end face of the protective door panel, wherein multiple damping telescopic rods are provided between the first and second grid-shaped reinforcing ribs, wherein a butterfly buffer spring is sleeved on the outer side of the damping telescopic rods, and a honeycomb aluminum core layer is provided between the first and second grid-shaped reinforcing ribs.

[0007] Preferably, the rectangular array of the edge of the protective door panel is fixedly connected with multiple guide holes, and the multiple guide posts pass through the multiple guide holes and are attached to the rear end face of the fixed frame.

[0008] Preferably, each of the guide posts is provided with an internal threaded hole, and the main frame of the airtight door and the fixed frame are connected and fixed by multiple bolts passing through the fixed frame and then inserted into the internal threaded holes of the multiple guide posts.

[0009] Preferably, the first grid-shaped reinforcing ribs are provided with multiple first intersecting nodes, and the second grid-shaped reinforcing ribs are provided with multiple second intersecting nodes.

[0010] Preferably, the rear ends of the plurality of damping telescopic rods are respectively fixedly connected to the front ends of the plurality of first intersecting nodes on the first grid-shaped reinforcing ribs.

[0011] Preferably, the front ends of the multiple damping telescopic rods are fixedly connected to rubber shock-absorbing pads, and the front end of each rubber shock-absorbing pad is respectively attached to the rear end of multiple second cross nodes on the second grid-shaped reinforcing ribs.

[0012] Preferably, the rear ends of the plurality of butterfly-shaped buffer springs are respectively fixedly connected to the front ends of the plurality of first cross nodes on the first grid-shaped reinforcing ribs, and the front ends of the plurality of butterfly-shaped buffer springs are respectively attached to the rear ends of the plurality of second cross nodes.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, a modular design is adopted, and the protective door panel can be quickly replaced through a detachable fixed frame and guide column structure. When the outer door panel is damaged, there is no need to replace the entire airtight door, which significantly reduces maintenance costs and improves economy.

[0015] (2) In this utility model, a multi-level buffer system is set up. Through the synergistic effect of the damping telescopic rod, the butterfly buffer spring and the honeycomb aluminum core layer, a three-level energy absorption mechanism of "elastic buffer-hydraulic damping-plastic deformation" is formed, which greatly improves the impact resistance performance and can effectively resist instantaneous high-energy loads such as explosive shock waves.

[0016] (3) In this utility model, a composite structure of grid-shaped reinforcing ribs and honeycomb aluminum core is innovatively adopted, which not only ensures structural strength but also achieves lightweighting. The coordinated design of guide columns and reinforcing ribs ensures the uniform transmission of impact loads while maintaining the overall structural stability of the door. Attached Figure Description

[0017] Figure 1 This is a front view of the impact-resistant structure of a steel structure protective airtight door according to this utility model;

[0018] Figure 2 This is a side sectional view of the guide post of this utility model;

[0019] Figure 3 This is a side sectional view of the damping telescopic rod of this utility model;

[0020] Figure 4 This is a schematic diagram of the buffer structure of this utility model;

[0021] Figure 5 This is a detailed enlarged view of part A of this utility model.

[0022] In the diagram: 1. Main frame of the airtight door; 101. First crisscross reinforcing ribs; 102. First intersection node; 103. Guide post; 104. Internal threaded hole; 2. Protective door panel; 201. Second crisscross reinforcing ribs; 202. Second intersection node; 203. Guide through hole; 3. Honeycomb aluminum core layer; 4. Damping telescopic rod; 401. Rubber shock-absorbing pad; 402. Butterfly buffer spring; 5. Fixed frame; 501. Bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figure 1-5This utility model provides an embodiment of an impact-resistant structure for a steel-structured protective airtight door, comprising an airtight door main frame 1, a first grid-shaped arrangement of reinforcing ribs 101 fixedly connected to the rear end face of the main frame 1, a plurality of guide posts 103 fixedly connected to the rectangular array edge of the rear end face of the main frame 1, a fixed frame 5 connected to the front end of the main frame 1 and to the front end of the plurality of guide posts 103, a protective door panel 2 provided at the rear end of the fixed frame 5 inside the main frame 1, a second grid-shaped arrangement of reinforcing ribs 201 fixedly connected to the rear end face of the protective door panel 2, a plurality of damping telescopic rods 4 provided between the first grid-shaped arrangement of reinforcing ribs 101 and the second grid-shaped arrangement of reinforcing ribs 201, a butterfly-shaped buffer spring 402 sleeved on the outer side of the damping telescopic rods 4, a plurality of first cross nodes 102 provided on the first grid-shaped arrangement of reinforcing ribs 101, a plurality of second cross nodes 202 provided on the second grid-shaped arrangement of reinforcing ribs 201, and a plurality of damping... The rear ends of the telescopic rods 4 are fixedly connected to the front ends of multiple first cross nodes 102 on the first grid-shaped reinforcing ribs 101. Rubber shock-absorbing pads 401 are fixedly connected to the front ends of the telescopic ends of the multiple damping telescopic rods 4. The front ends of each rubber shock-absorbing pad 401 are respectively attached to the rear ends of multiple second cross nodes 202 on the second grid-shaped reinforcing ribs 201. The rear ends of multiple butterfly buffer springs 402 are respectively fixedly connected to the front ends of multiple first cross nodes 102 on the first grid-shaped reinforcing ribs 101. The front ends of multiple butterfly buffer springs 402 are respectively attached to the rear ends of multiple second cross nodes 202. A honeycomb aluminum core layer 3 is provided between the first grid-shaped reinforcing ribs 101 and the second grid-shaped reinforcing ribs 201. When the protective door panel 2 is subjected to external impact, the impact force is first transmitted to the second grid-shaped reinforcing ribs 201 through the protective door panel 2. The second cross nodes 202 disperse the impact force to the multiple damping telescopic rods 4 and the butterfly buffer springs 402. When compressed, the damping telescopic rod 4 gradually absorbs the impact energy through internal hydraulic damping, while the rubber shock-absorbing pad 401 at its front end further mitigates the instantaneous impact; the butterfly buffer spring 402 converts part of the impact energy into elastic potential energy through elastic deformation, achieving multi-stage buffering. The honeycomb aluminum core layer 3 utilizes the high specific strength characteristics of its honeycomb structure to absorb the remaining energy through plastic deformation during compression, and transfers the dispersed load to the main frame 1 of the airtight door through the first grid-shaped reinforcing ribs 101.

[0025] Please see Figure 2The protective door panel 2 has multiple guide holes 203 fixedly connected to the rectangular array of the edge. Multiple guide posts 103 pass through the multiple guide holes 203 and fit against the rear end face of the fixed frame 5. Each guide post 103 has an internal threaded hole 104. The main frame 1 of the airtight door and the fixed frame 5 are fixed by multiple bolts 501 passing through the fixed frame 5 and being inserted into the internal threaded holes 104 of the multiple guide posts 103. If the protective door panel 2 is damaged and needs to be replaced, simply remove the bolts 501 of the fixed frame 5, slide the old protective door panel 2 out along the guide posts 103 and replace it with a new door panel. The cooperation between the guide posts 103 and the guide holes 203 ensures the installation accuracy, and the fixing method of the bolts 501 and the internal threaded holes 104 enables quick disassembly and assembly.

[0026] Working Principle: During use, when the protective airtight door is subjected to external impact, the impact force first acts on the protective door panel 2, and the impact load is distributed and transferred to each of the second intersection nodes 202 through the second grid-shaped reinforcing ribs 201. When under pressure, the damping telescopic rod 4 generates progressive resistance through the internal hydraulic damper, which, together with the elastic deformation of the front rubber shock-absorbing pad 401, absorbs the instantaneous impact energy; at the same time, the butterfly buffer spring 402 undergoes elastic deformation, converting part of the impact energy into elastic potential energy to achieve secondary buffering. When under pressure, the honeycomb aluminum core layer 3 further dissipates the remaining energy through the plastic deformation of the honeycomb structure, and the distributed load is evenly transferred to the main frame 1 of the airtight door through the first grid-shaped reinforcing ribs 101. The multi-stage buffering system works in concert, so that the impact energy is absorbed in a stepwise manner through three stages: elastic buffering, hydraulic damping, and plastic deformation. When it is necessary to replace the damaged protective door panel 2, loosen the bolt 501 to release the constraint of the fixed frame 5, and the damaged door panel can slide out along the guide post 103. The new door panel can be quickly installed by precisely aligning the guide through hole 203 with the guide post 103. Finally, tighten the bolt 501 to complete the fixation.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An impact-resistant structure for a steel-structured protective airtight door, comprising a main frame (1) of the airtight door, characterized in that: The rear end face of the sealed door main frame (1) is fixedly connected with a first grid-shaped reinforcing rib (101). The rear end face of the sealed door main frame (1) is fixedly connected with a rectangular array of guide posts (103). The front end of the sealed door main frame (1) is connected with a fixed frame (5) at the front end of the multiple guide posts (103). The rear end of the fixed frame (5) of the sealed door main frame (1) is provided with a protective door panel (2). The rear end face of the protective door panel (2) is fixedly connected with a second grid-shaped reinforcing rib (201). Multiple damping telescopic rods (4) are provided between the first grid-shaped reinforcing rib (101) and the second grid-shaped reinforcing rib (201). A butterfly buffer spring (402) is sleeved on the outside of the damping telescopic rod (4). A honeycomb aluminum core layer (3) is provided between the first grid-shaped reinforcing rib (101) and the second grid-shaped reinforcing rib (201).

2. The impact-resistant structure of a steel structure protective airtight door according to claim 1, characterized in that: The protective door panel (2) has a rectangular array of fixedly connected guide holes (203), and the guide posts (103) pass through the guide holes (203) and fit against the rear end face of the fixed frame (5).

3. The impact-resistant structure of a steel structure protective airtight door according to claim 1, characterized in that: Each of the guide posts (103) is provided with an internal threaded hole (104). The main frame (1) of the airtight door and the fixed frame (5) are connected and fixed by multiple bolts (501) passing through the fixed frame (5) and then being inserted into the internal threaded holes (104) of the guide posts (103).

4. The impact-resistant structure of a steel structure protective airtight door according to claim 1, characterized in that: The first grid-shaped reinforcing rib (101) is provided with a plurality of first intersecting nodes (102), and the second grid-shaped reinforcing rib (201) is provided with a plurality of second intersecting nodes (202).

5. The impact-resistant structure of a steel structure protective airtight door according to claim 4, characterized in that: The rear ends of the multiple damping telescopic rods (4) are respectively fixedly connected to the front ends of multiple first cross nodes (102) on the first grid-shaped reinforcing ribs (101).

6. The impact-resistant structure of a steel structure protective airtight door according to claim 5, characterized in that: The front ends of the multiple damping telescopic rods (4) are fixedly connected with rubber shock-absorbing pads (401), and the front end of each rubber shock-absorbing pad (401) is respectively attached to the rear end of multiple second cross nodes (202) on the second grid-shaped reinforcing ribs (201).

7. The impact-resistant structure of a steel structure protective airtight door according to claim 4, characterized in that: The rear ends of the plurality of butterfly buffer springs (402) are respectively fixedly connected to the front ends of the plurality of first cross nodes (102) on the first grid-shaped reinforcing ribs (101), and the front ends of the plurality of butterfly buffer springs (402) are respectively attached to the rear ends of the plurality of second cross nodes (202).

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