Anti-knock door

Abstract

The utility model provides an anti-knock door which comprises a door body, the door body is formed by combining an outer-layer steel plate, an inner-layer steel plate and a profile steel fixing frame, and rivets are welded on the surfaces of the outer-layer steel plate and the inner-layer steel plate. According to the anti-explosion door, by arranging the structures such as the outer-layer steel plate, the inner-layer steel plate, the profile steel fixing frames, the filling materials and the rivets, the outer-layer steel plate and the inner-layer steel plate directly bear explosion impact force by means of the thickness and double-layer combination of the outer-layer steel plate and the inner-layer steel plate, the strength and deformation resistance of the door body are remarkably improved, and the thickness can be flexibly designed according to needs; the profile steel fixing frame provides firm support with high rigidity and strength, the internal connecting strips and the through holes uniformly distribute assisting energy, stress concentration is prevented, the filling materials comprehensively play the roles of fire prevention, heat insulation, sound insulation and energy buffering, fire hazards, high temperature and noise hazards are reduced, all the components are firmly connected through rivets, and the service life is prolonged. The connection reliability and stress distribution are further optimized through the hemispheres, the anti-explosion performance is enhanced, and the protection capacity of the anti-explosion door in an explosion scene is improved.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof door technology, and more specifically, to an explosion-proof door. Background Technology

[0002] In various industrial, military, and special civilian facilities, blast-resistant doors serve as crucial safety protection equipment, their performance directly impacting the safety of personnel and property. Currently, the main structure of known blast-resistant and explosion-proof protective doors is primarily composed of steel plates and steel frame fixings, with door leaf structures available in single-sided and double-sided steel plate configurations.

[0003] However, existing blast-resistant doors have the following problems when in use:

[0004] For double-sided steel plate blast-resistant doors, the conventional approach is to weld one side of a single steel plate to a steel frame, filling the space between the frames with material. However, if the other side is also welded to a single steel plate, welding the interlayer becomes difficult, leading to incomplete welding of the hollow areas. To address this, the steel plate is typically divided into several sections and welded onto the steel frame to form a whole. However, this structure has many drawbacks. The internal stress generated during welding can cause severe deformation of the door, significantly impacting its performance and lifespan. Furthermore, the complex welding process increases manufacturing difficulty and costs. Over time, the deformation caused by internal stress can lead to peeling of the surface coating, affecting not only aesthetics but also potentially reducing protective performance. Additionally, its high level of specialization and demanding manufacturing processes and techniques raise the barrier to entry for users, limiting the product's widespread application. Moreover, traditional protective doors, such as ancient city gates, were often made of wood, consisting of several layers of planks stacked together and secured with nails. The impact resistance of these wooden doors is far inferior to that of modern steel doors, making them ineffective against high-intensity impacts such as explosions. Furthermore, wooden doors are susceptible to environmental factors, requiring frequent and costly maintenance, which significantly reduces their practicality in modern society and limits their applicability.

[0005] This utility model door leaf is made of double-sided steel plates, all of which are whole steel plates. The riveting structure is used to connect and fix the door, replacing the splicing and welding structure. This provides a two-way fixation of the door surface and increases its strength. It reduces the phenomenon of severe door deformation caused by increased internal stress due to splicing and welding. At the same time, it reduces production costs, manufacturing difficulty and user threshold. The paint will not peel off after long-term use. Utility Model Content

[0006] The present invention aims to solve the technical problems mentioned in the background art and provide an explosion-proof door.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof door, comprising: a door body, the door body being composed of an outer steel plate, an inner steel plate, and a steel frame, wherein rivets are welded to the surfaces of the outer and inner steel plates, and a hemisphere is welded to the other end of each rivet; the steel frame is disposed between the outer and inner steel plates, and a filling material is disposed between the outer and inner steel plates; the rivet pin portion passes sequentially through the outer steel plate, the steel frame, and the inner steel plate and is welded to the hemisphere.

[0008] A further preferred embodiment: both the outer steel plate and the inner steel plate have several through holes on their surfaces.

[0009] A further preferred embodiment: both the outer steel plate and the inner steel plate are made of steel plates of a certain thickness, and the thickness of the outer steel plate and the inner steel plate may be the same or different depending on the design strength.

[0010] A further preferred embodiment: the steel fixing frame is composed of channel steel or square tube steel welded together, and a number of connecting strips are welded at equal intervals inside the steel fixing frame, and a number of through holes are opened on the surface of the connecting strips.

[0011] A further preferred embodiment: the second through hole has the same structure as the first through hole on the outer steel plate and the inner steel plate.

[0012] A further preferred embodiment: the filling material may be made of fireproof, heat-insulating, and sound-insulating materials.

[0013] A further preferred embodiment: The rivet is made of steel and consists of two parts: a rivet pin and a hemisphere. The hemisphere is pressed using cold riveting, hot riveting, and machining manufacturing techniques.

[0014] Beneficial effects:

[0015] 1. By setting up an outer steel plate, an inner steel plate, and a steel frame, the outer and inner steel plates directly bear the explosive impact force. Compared with a single steel plate, the double-layer structure significantly enhances the strength and deformation resistance of the door, effectively resists the explosion pressure, and reduces the deformation and damage of the door under the action of an explosion. The thickness of the steel plate can be flexibly adjusted according to the design strength to meet the needs of different scenarios. The steel frame is welded from channel steel or square tube steel, with high strength and rigidity, providing reliable support for the door and ensuring the structural stability of the door under the impact of an explosion. Its internal connecting strip further enhances the overall integrity. The connecting strip and the through holes on the steel plate form an interconnected structure, which is conducive to the uniform distribution of explosion energy and avoids stress concentration. This structural combination not only significantly improves the explosion-proof performance, but also takes into account the design flexibility, and comprehensively ensures the safety protection function of the explosion-proof door in complex and dangerous environments.

[0016] 2. By incorporating a filling material between the outer and inner steel plates, its primary function is to absorb and buffer the energy generated by the explosion, greatly reducing the impact force transmitted to other parts of the door, thereby improving the overall explosion-proof performance of the door. From a fire prevention perspective, fire-resistant materials can effectively prevent the spread of fire, reducing the risk of the door being penetrated by flames in the event of a fire caused by an explosion, and protecting the space and items behind the door from fire damage. Thermal insulation materials play a role in reducing heat transfer, preventing the door from deforming due to the high temperatures of the explosion, thus affecting its explosion-proof performance, while also preventing burns to people behind the door from contact with the hot door, maintaining a suitable temperature in the space behind the door. Sound insulation materials effectively absorb and block the enormous noise generated by the explosion, protecting the hearing of people behind the door, preventing panic and chaos caused by noise, ensuring communication and command order in emergencies, and creating favorable conditions for personnel safety and rescue evacuation.

[0017] 3. By incorporating rivets and a hemisphere, the rivets, made of steel, pass sequentially through the outer steel plate, the steel frame, and the inner steel plate, tightly connecting the three into a single unit. This enhances the overall connection strength of the door, allowing each part to work together to withstand external forces when impacted. The hemisphere, welded to the other end of the rivet, increases the connection area between the rivet and the steel plate, distributing the force more evenly and effectively reducing local stress concentration, thus significantly improving connection reliability. Furthermore, the unique shape of the hemisphere better adapts to the complex force direction during an explosion. When the explosive energy reaches this point, the hemisphere can distribute the impact force evenly, enhancing the rivet's resistance to deformation and detachment, thereby significantly improving the door's explosion resistance and providing strong protection for the door's stability in an explosive environment.

[0018] 4. In summary, this type of blast-resistant door, through its structure consisting of an outer steel plate, an inner steel plate, a steel frame, filling material, and rivets, allows the outer and inner steel plates, with their thickness and double-layer combination, to directly withstand the explosive impact, significantly enhancing the door's strength and resistance to deformation. The thickness can be flexibly designed as needed. The steel frame provides solid support with high rigidity and strength, while internal connecting strips and through holes help distribute energy evenly and prevent stress concentration. The filling material provides comprehensive fireproofing, heat insulation, sound insulation, and energy buffering, reducing the hazards of fire, high temperatures, and noise. Rivets firmly connect all components, and the hemispherical structure further optimizes connection reliability and stress distribution, enhancing blast-resistant performance. These complementary structures greatly improve the blast-resistant door's protective capabilities in explosive scenarios, ensuring the safety of personnel and property. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2This is a partial cross-sectional view of the door structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the inner and outer steel plate structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the steel fixing frame structure of this utility model.

[0023] Figure 5 This is a schematic diagram of the door rivet structure of this utility model.

[0024] Figure 1-5 In the middle: 1. Door body; 101. Outer steel plate; 102. Inner steel plate; 103. Through hole one; 2. Steel fixing frame; 201. Connecting strip; 202. Through hole two; 3. Rivet; 301. Hemisphere. Detailed Implementation

[0025] The following will refer to the appendix in the embodiments of this utility model. Figures 1-5 The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0026] Please see Figure 1-5In this embodiment of the utility model, an explosion-proof door includes: a door body 1, which is composed of an outer steel plate 101, an inner steel plate 102, and a steel frame 2. Rivets 3 are welded to the surfaces of the outer steel plate 101 and the inner steel plate 102, and a hemisphere 301 is welded to the other end of each rivet 3. The steel frame 2 is disposed between the outer steel plate 101 and the inner steel plate 102, and a filling material is provided between them. The pin portion of the rivet 3 passes sequentially through the outer steel plate 101, the steel frame 2, and the inner steel plate 102, and is welded to the hemisphere 301. Several through holes 103 are provided on the surfaces of both the outer steel plate 101 and the inner steel plate 102. The steel frame 2 is composed of channel steel or square tubular steel. The door is constructed by welding. The steel frame 2 has several connecting strips 201 welded at equal intervals inside. Each connecting strip 201 has several through holes 202 on its surface. These through holes 202 have the same structure as the through holes 103 on the outer steel plate 101 and inner steel plate 102. The outer steel plate 101 and inner steel plate 102 provide the basic structural support and protection for the explosion-proof door, enabling it to directly withstand the impact of an explosion. Furthermore, the door leaf is a double-sided steel plate structure, consisting of a single sheet of steel, increasing the door's strength and resistance to deformation. Compared to a single-layer steel plate, it better resists the pressure and impact of an explosion, reducing deformation and damage to the door under explosive forces. The use of riveting to connect and fix the door instead of welded panels provides bidirectional fixation and increased strength. The design reduces the severe deformation of the door body 1 caused by increased internal stress from panel welding, while also lowering production costs, manufacturing difficulty, and user accessibility. The paint will not peel or flake off even after long-term use. The steel frame 2, constructed from channel steel or square tubular steel, possesses high strength and rigidity, providing reliable support for the door body 1 and ensuring its structural stability under explosive impact. Several equidistant connecting strips 201 further enhance the integrity and stability of the steel frame 2. Furthermore, the through holes 202 on the connecting strips 201 are structurally identical to the through holes 103 on the outer steel plate 101 and inner steel plate 102, facilitating the formation of an interconnected structure within the door body, thus mitigating the impact of explosions. Energy can be distributed more evenly in all parts of the door, avoiding stress concentration. The filling material between the outer steel plate 101 and the inner steel plate 102 can absorb and buffer the energy generated by the explosion, reduce the impact force transmitted to other parts of the door, and improve the sound insulation and heat insulation performance of the door. In the event of an explosion, it can also prevent the spread of heat and noise to a certain extent. The rivet 3 connects the outer steel plate 101, the steel fixing frame 2 and the inner steel plate 102 together, enhancing the overall connection strength of the door, so that the door can withstand the external force as a whole when it is impacted. The hemisphere 301 is welded to the other end of the rivet 3, which increases the connection area between the rivet 3 and the steel plate and improves the reliability of the connection.On the other hand, the shape of the hemisphere 301 can disperse the impact force to a certain extent. When the explosive energy is transferred to the rivets and the hemisphere, the hemisphere 301 can distribute the force evenly around it, reducing local stress and thus improving the explosion resistance of the door. When the explosion-proof door is subjected to an explosive impact, the outer steel plate 101 first bears the initial impact force. The pressure generated by the explosion is transferred through the outer steel plate 101 to the steel frame 2 and the inner steel plate 102. The steel frame 2 plays a supporting and pressure-dispersing role, distributing the impact force throughout the door structure and avoiding excessive local stress. At the same time, the filling material also absorbs and buffers the explosive energy to a certain extent. The rivets 3 and hemisphere 301 on the surface of the outer steel plate 101 and the inner steel plate 102, as well as the connecting strip 201 and its through hole 202 inside the steel frame 2, cooperate with the through hole 103 on the outer steel plate 101 and the inner steel plate 102 to further disperse the energy and enhance the overall strength and deformation resistance of the door.

[0027] In this embodiment of the invention, both the outer steel plate 101 and the inner steel plate 102 are made of steel plates of a certain thickness. The thickness of the outer steel plate 101 and the inner steel plate 102 may be the same or different depending on the design strength. The use of steel plates of a certain thickness for both the outer and inner steel plates is fundamental to ensuring the explosion-proof door has sufficient explosion-proof capability. Sufficient thickness allows the steel plate to withstand explosive impacts more effectively, reducing the possibility of deformation and breakage, thereby effectively protecting the area behind the door and the safety of personnel. The thickness of the outer steel plate 101 and the inner steel plate 102 may be the same or different depending on the design strength. This provides great flexibility in the design of blast-resistant doors. Designers can adjust the thickness of the two steel plates according to specific usage scenarios, expected explosion intensity, and cost. For example, in some places with high explosion risk and extremely strict protection requirements, the outer steel plate 101 can be designed to be thicker to better resist the initial impact. In some scenarios where cost is more sensitive or explosion risk is relatively low, the combination of the thickness of the two steel plates can also be appropriately adjusted to optimize cost and door weight while meeting blast-resistant requirements. This design approach can meet the diverse needs of different users and scenarios, making the design of blast-resistant doors more scientific and reasonable.

[0028] In this embodiment of the invention, the filling material can be made of fireproof, heat-insulating, and sound-insulating materials. Using fireproof materials as filling materials can effectively prevent the spread of fire, buying time for personnel evacuation and fire rescue. In the event of an explosion, a fire may be triggered. Fireproof filling materials can reduce the risk of the door 1 being penetrated by flames, protecting the space and items behind the door from fire damage. Heat-insulating materials can reduce heat transfer and lower the surface temperature of the door. On the one hand, in the case of high temperatures generated by an explosion, it can prevent the door from deforming due to overheating, affecting its explosion-proof performance; on the other hand, it can also prevent people behind the door from being burned by contact with the high-temperature door, while helping to maintain the temperature of the space behind the door, providing a relatively safe environment for people. Sound-insulating materials can effectively absorb and block the huge noise generated by the explosion, reducing the impact of noise on the surrounding environment and people. This not only helps to protect the hearing of people behind the door and avoid panic and chaos caused by noise, but also helps to maintain a certain communication and command order in emergency situations, facilitating rescue and evacuation work.

[0029] In this embodiment of the invention, the rivet 3 is made of steel and consists of a rivet pin and a hemisphere 301. The hemisphere 301 is pressed using cold riveting, hot riveting, and machining techniques. The rivet pin passes sequentially through the outer steel plate 101, the steel frame 2, and the inner steel plate 102, connecting the components to form a whole. The hemisphere 301 is welded to the other end of the pin, increasing the contact area between the rivet and the steel plate. This allows the force to be distributed more evenly on the steel plate when subjected to external forces, reducing local stress concentration and improving the reliability of the connection. Furthermore, the shape of the hemisphere can better adapt to the force direction during explosive impacts, enhancing the rivet's resistance to deformation and detachment. Cold riveting eliminates the need for heating the rivet, making the operation relatively simple and efficient. It also avoids material defects caused by heating. Performance changes, such as the reduction in strength caused by annealing, can affect the mechanical properties of the rivet itself. Cold riveting is suitable for heat-sensitive or heat-unsuitable situations, and can better maintain the original performance of the components of the explosion-proof door. Hot riveting involves riveting the rivet after heating it to a certain temperature. In the hot state, the plasticity of the rivet material increases, making it easier to deform and fill the gaps in the connection, forming a tighter and stronger connection. For some occasions requiring higher connection strength, hot riveting technology can make the bond between the hemispherical 301 and the pin and steel plate stronger, improving the stability of the explosion-proof door under the impact of an explosion. Moreover, the hot riveting process can better eliminate the internal stress of the material, reducing early damage caused by stress concentration. It can also be machined or replaced with standard hemispherical bolts and spherical nuts, and then welded after tightening.

[0030] Working Principle: When an explosion occurs, the blast-resistant door is impacted. The outer steel plate 101 initially absorbs the strong impact force. Due to its thickness and strength, the outer steel plate 101 directly resists the pressure generated by the explosion, initially transferring some of the impact force to other parts of the door structure. The pressure generated by the explosion is then transferred through the outer steel plate 101 to the steel frame 2 and the inner steel plate 102. The steel frame 2, constructed from a combination of channel steel or square tubular steel, possesses high strength and rigidity, playing a crucial role in supporting and dispersing the pressure, thus distributing the impact force throughout the entire door structure and preventing localized impacts. When subjected to excessive force, the filling material also begins to function, absorbing and buffering part of the explosion energy and reducing the impact force transmitted to other parts of the door. The rivets 3 and hemispheres 301 on the surfaces of the outer steel plate 101 and inner steel plate 102, as well as the connecting strips 201 and their through holes 202 inside the steel frame 2, cooperate with the through holes 103 on the outer steel plate 101 and inner steel plate 102. The pin portion of the rivets 3 passes through the outer steel plate 101, the steel frame 2, and the inner steel plate 102 in sequence and is welded to the hemispheres 301, enhancing the overall connection strength of the door and making the door more resilient to external forces. During impact, the hemisphere 301 can withstand external forces as a whole. On the one hand, it increases the connection area between the rivet 3 and the steel plate, improving the connection reliability; on the other hand, it distributes the force evenly to the surroundings, reducing local stress and thus improving the explosion resistance of the door. The through hole 202 on the connecting strip 201 has the same structure as the through hole 103 on the outer steel plate 101 and the inner steel plate 102, which helps to form an interconnected structure inside the door, allowing the explosion energy to be distributed more evenly in all parts of the door, avoiding stress concentration, and further enhancing the overall strength and deformation resistance of the door. Throughout the blast-resistant process, in addition to absorbing and buffering the explosive energy, the filling material also plays a role in fireproofing, heat insulation, and sound insulation. If the explosion causes a fire, the fireproof material can effectively prevent the fire from spreading, reduce the risk of the door being penetrated by flames, and protect the space and items behind the door. The heat insulation material reduces heat transfer, prevents the door from deforming due to overheating and affecting the blast-resistant performance, and at the same time avoids burns to people behind the door and maintains the temperature of the space behind the door. The sound insulation material effectively absorbs and blocks the huge noise generated by the explosion, protects the hearing of people behind the door, avoids panic and chaos caused by noise, and facilitates communication and command order in emergency situations.

Claims

1. A blast-resistant door, comprising: The door body (1) is characterized in that: the door body (1) is composed of an outer steel plate (101), an inner steel plate (102) and a steel frame (2), and rivets (3) are welded to the surfaces of the outer steel plate (101) and the inner steel plate (102). A hemisphere (301) is welded to the other end of the rivet (3). The steel frame (2) is arranged between the outer steel plate (101) and the inner steel plate (102), and a filling material is provided between the outer steel plate (101) and the inner steel plate (102). The pin part of the rivet (3) passes through the outer steel plate (101), the steel frame (2), and the inner steel plate (102) in sequence and is welded to the hemisphere (301).

2. The explosion-proof door according to claim 1, characterized in that: Both the outer steel plate (101) and the inner steel plate (102) have several through holes (103) on their surfaces.

3. The explosion-proof door according to claim 1, characterized in that: Both the outer steel plate (101) and the inner steel plate (102) are made of steel plates of a certain thickness. The thickness of the outer steel plate (101) and the inner steel plate (102) may be the same or different depending on the design strength.

4. The explosion-proof door according to claim 1, characterized in that: The steel fixing frame (2) is made of channel steel or square tube steel by combination and welding. The steel fixing frame (2) has several connecting strips (201) welded at equal intervals inside. Several through holes (202) are opened on the surface of the connecting strips (201).

5. The explosion-proof door according to claim 4, characterized in that: The structure of the second through hole (202) is the same as that of the first through hole (103) on the outer steel plate (101) and the inner steel plate (102).

6. The explosion-proof door according to claim 1, characterized in that: The filling material can be made of fireproof, heat-insulating, and sound-insulating materials.

7. The explosion-proof door according to claim 1, characterized in that: The rivet (3) is made of steel and consists of two parts: a rivet (3) pin and a hemisphere (301). The hemisphere (301) is pressed by cold riveting, hot riveting and machining manufacturing technology.

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