A high-safety simple explosion-proof door for a cave or structure

Abstract

The present invention discloses a high-safety simple explosion-proof door for a cave or a structure, wherein the door opening is a door opening on a cave of a mountain or a door opening on a wall of a structure, and the explosion-proof door comprises an explosion-proof door plate, a plurality of damping energy absorbing devices, and an explosion-proof door plate rotating device; the damping energy absorbing device is arranged on the mountain above the door opening or on the wall of the structure above the door opening, and a door shaft is arranged below the ground in the door opening; a plate pit is arranged on the ground in front of the door opening. The door shaft of the high-safety explosion-proof door of the present invention is located below the ground in the door opening, and is not easily affected by the explosion shock wave during an explosion. The damping energy absorbing device can effectively protect the explosion-proof door plate, and has the characteristics of simple structure, good explosion-proof effect, and can effectively protect the safety of the door opening.

Description

Technical Field

[0001] The invention relates to an explosion-proof door, belonging to the technical field of protective structures. Background Art

[0002] Explosion-proof doors are protective devices for door openings in bunker projects or structures. In the face of the current application of high-tech in modern weapons and equipment, the weakest link appears in the protective door. The outstanding disadvantages of the explosion-proof doors of the existing technology are:

[0003] (1) The protective door is heavy and thick, with high construction costs. It is inconvenient to transport and install, which affects normal opening and maintenance. Once the protective door is damaged, emergency repair and construction are extremely difficult, resulting in blockage of the entrance and exit, seriously affecting the safety of personnel and equipment inside the door; the protective door is set on the door opening. Under the action of high-intensity shock waves, the door opening and device are easily deformed under the weight of the door panel and the shock wave, resulting in the door being unable to open, causing blockage of the entrance and exit, affecting normal opening and maintenance. When the door is hit by an explosion, an explosion pit will be formed in front of the door, and the mechanical equipment inside the protective door cannot be driven out of the door normally. When the door is hit by an explosion, the door is prone to collapse, causing blockage of the entrance and exit.

[0004] (2) The material and structure of the protective door are single, which is not conducive to improving the protection capability of the structure, and the protection standard for conventional explosion effects is relatively low;

[0005] (3) The blast-proof doors contain thick concrete, which produces a huge weight. In order to prevent foundation settlement, especially uneven settlement, the difficulty of foundation construction in some areas with soft soil is increased, the construction period is extended, and the site selection of ground protection projects is subject to certain restrictions.

[0006] (4) The structure contains materials such as concrete or foam concrete, which have low resistance, are easy to deform, are heavy, and are inconvenient to transport and install. According to the destruction phenomenon and analysis of the explosion-proof door in the tunnel explosion test, the destructive effect of the explosion-proof door is the result of the combined action of fragments and shock waves. The separate action of fragments and shock waves cannot cause such serious destructive effects. Therefore, in the design of the explosion-proof door, it is necessary not only to consider the penetration of the explosion-proof door by fragments and the deformation and destruction of the explosion-proof door under the action of shock waves alone, but also to pay attention to the combined destructive effect of fragments and shock waves on the explosion-proof door. Under the dual action of fragments and shock waves, the bulk material will cause splashing, causing a certain degree of damage to the objects and personnel in the protective door. This kind of splashing is difficult to solve by simply coating the outer surface of the structure with explosion-proof coatings.

[0007] (5) The door axis of the explosion-proof door is easily damaged and deformed when it is hit by an explosion, resulting in the explosion-proof door being unable to be opened. Summary of the invention

[0008] One of the purposes of the present invention is to provide a high-security simple explosion-proof door for a cavern or structure to solve the problem that when an explosion occurs at a close distance outside the doorway, an explosion pit will be formed in front of the door, the door will be deformed and cannot be opened, and mechanical equipment inside the protective door cannot be driven out of the door normally, causing the entrance and exit to be blocked.

[0009] Another object of the present invention is to provide a high-security simple explosion-proof door for a cave or structure to solve the problems of single materials and structural forms of the protective door, high requirements on geological conditions for the door body, and splashing of bulk materials, which may cause a certain degree of damage to objects and personnel in the protective door.

[0010] Another object of the present invention is to provide a high-safety simple explosion-proof door for a cave or structure, so as to solve the problem that the door axis is easily damaged when an explosion occurs at a close distance outside the door opening.

[0011] The technical solution adopted by the present invention is as follows.

[0012] A high-security simple explosion-proof door for a cave or a structure, installed on a door opening of the cave or the structure, wherein the door opening is a door opening on a cave in a mountain or a door opening on a wall of a structure, characterized in that: the explosion-proof door comprises an explosion-proof door plate, a plurality of damping energy absorbing devices, and an explosion-proof door plate rotating device, and gaps are left between the two sides of the explosion-proof door plate and the door opening; the damping energy absorbing device is arranged on the mountain above the door opening or on the wall of the structure above the door opening;

[0013] An embedded part is provided below the ground in the door opening, a rotatable door shaft is connected to the embedded part, and the bottom end of the explosion-proof door panel is connected to the door shaft; a plate pit is provided on the ground in front of the door opening;

[0014] The explosion-proof door panel rotating device is a diagonal explosion-proof door panel rotating device;

[0015] The oblique-pull explosion-proof door panel rotating device comprises a hoisting device arranged at the upper end of the door opening or near the upper edge of the door opening, and the hoisting device is connected to the explosion-proof door panel through a cable;

[0016] When the rear side surface of the explosion-proof door panel is in contact with the damping energy absorbing device, the angle between the explosion-proof door panel and the ground is not less than 60 degrees; when the explosion-proof door panel rotates clockwise along its bottom end and falls into the plate pit, the rear side surface of the explosion-proof door panel can be made flush with the ground; when the rear side surface of the explosion-proof door panel is in contact with the damping energy absorbing device and the front of the explosion-proof door panel is impacted by the explosion, the explosion-proof door panel rotates along its bottom end and its rear side surface squeezes the damping energy absorbing device and closes the door opening.

[0017] As a preferred technical solution, when the damping energy absorption device is squeezed to the limit, the angle between the explosion-proof door panel and the ground is not less than 80 degrees.

[0018] As a preferred technical solution, an explosion-proof cover is provided on the mountain above the doorway or on the wall of the structure above the doorway.

[0019] As an optimal technical solution, the left and right sides of the bottom surface of the explosion-proof cover are symmetrically connected with side explosion-proof panels; the side explosion-proof panels are perpendicular to the front side of the door opening and perpendicular to the ground; and the explosion-proof door panel is located between the two side explosion-proof panels.

[0020] As a preferred technical solution, the damping energy absorption device is connected to the explosion-proof cover through a connecting piece.

[0021] As an optimal technical solution, the distance between the bottom surface of the explosion-proof hood and the door axis is slightly larger than the distance between the top surface of the explosion-proof door panel and the door axis; the distance between the front end of the explosion-proof hood and the front side of the door opening is larger than the distance between the front end of the top surface of the explosion-proof door panel and the front side of the wall.

[0022] As a preferred technical solution, the front side of each side explosion-proof plate is flush with the front side of the explosion-proof cover.

[0023] As a preferred technical solution, the angle between the front side surface of each side explosion-proof panel and the ground is greater than the angle between the explosion-proof door panel and the ground.

[0024] As a preferred technical solution, the explosion-proof door panel includes three steel plate layers arranged in parallel, an energy absorbing layer 34, a foam metal plate layer 35, and a connecting piece. The energy absorbing layer 34 includes several energy absorbing layers, and each energy absorbing layer includes several energy absorbing tubes arranged in parallel.

[0025] The energy absorbing tubes of each energy absorbing layer are filled with the first energy absorbing material, or the energy absorbing tubes of each energy absorbing layer are filled with the second energy absorbing material, or the energy absorbing tubes of each energy absorbing layer are filled with the first energy absorbing material and the energy absorbing tubes of each energy absorbing layer are filled with the second energy absorbing material.

[0026] The energy absorbing tubes of two adjacent energy absorbing layers are perpendicular to each other; among the three steel plate layers, an energy absorbing layer is provided between the middle steel plate layer and the steel plate layer located in front of the middle steel plate layer, and a foam metal plate layer is provided between the middle steel plate layer and the steel plate layer located behind the middle steel plate layer.

[0027] The connecting parts are a plurality of connecting screws, and the steel plate layer located in front of the middle steel plate layer is connected with the steel plate layer located in the rear of the middle steel plate layer through a plurality of connecting screws passing through the energy absorbing layer and the foam metal plate layer, and the outer surfaces of each steel plate layer, each energy absorbing tube, the foam metal plate layer and the connecting screws are sprayed with explosion-proof coating, or,

[0028] The connecting piece is a square-shaped frame, each steel plate layer, each foam metal plate layer, and the energy absorption layer are installed on the frame, and the outer surfaces of each steel plate layer, each energy absorption tube, foam metal plate layer, and the frame are sprayed with explosion-proof paint, or,

[0029] The connecting parts are a plurality of clips, and the steel plate layer located in front of the middle steel plate layer is connected with the steel plate layer located in the rear of the middle steel plate layer through the clips, and the outer surfaces of each steel plate layer, each energy absorbing tube, foam metal plate layer and the clips are sprayed with explosion-proof coating, or,

[0030] The connecting parts are side plates. The steel plate layer in front of the middle steel plate layer and the steel plate layer behind the middle steel plate layer are welded to the side plates. The outer surfaces of each steel plate layer, each energy absorbing tube, foam metal plate layer and side plates are sprayed with explosion-proof paint.

[0031] As an optimal technical solution, the energy absorbing tube is an energy absorbing tube made of carbon fiber; the first energy absorbing material is hard polyurethane foam, and the second energy absorbing material is soft polyurethane foam; the foam metal plate layer is a foam metal plate layer made of foam aluminum; and each steel plate layer is a steel plate layer made of steel.

[0032] The beneficial effects of the present invention are as follows.

[0033] 1. When the rear side of the explosion-proof door panel contacts the damping energy absorbing device and the front of the explosion-proof door panel is impacted by the explosion, the explosion-proof door panel rotates along its bottom end to squeeze the damping energy absorbing device and seal the door opening. After compressing the damping energy absorbing device, the explosion-proof door panel falls under its own weight. If the explosion is very close to the explosion-proof door panel, an explosion pit will be formed in the explosion-proof door panel. The falling explosion-proof door panel will also cover the explosion pit formed in front of the door, which will buy precious time for the machinery inside the door, especially aircraft, vehicles and other machinery with high requirements on the road surface, to quickly drive out of the door and put into use.

[0034] 2. When the rear side of the explosion-proof door panel contacts the damping energy-absorbing device and the front of the explosion-proof door panel is impacted by the explosion, the explosion-proof door panel compresses the damping energy-absorbing device. While the damping energy-absorbing device absorbs energy, it delays the time for the explosion shock wave to act on the explosion-proof door panel. The dead weight of the explosion-proof door panel can offset the impact force generated by the explosion, thereby effectively reducing the destructive force of the explosion on the explosion-proof door panel.

[0035] 3. The explosion-proof door panel rotating device is located inside the door opening and is not easily damaged by explosions. It is equipped with explosion-proof covers and side explosion-proof panels, which have a certain protective effect on the door opening and protect the explosion-proof door panel rotating device, door shaft, etc.

[0036] 4. The door axis is located below the ground and retracted into the door opening. The door axis is low and buried, and is not easily damaged by explosions. The entire device is very safe and effective.

[0037] 5. Simple structure, easy transportation and installation, easy installation and maintenance.

[0038] 6. A structure is set up in which three steel plate layers coated with explosion-proof coating sandwich an energy-absorbing layer and a foam metal plate layer, and the three steel plate layers form a hard skeleton.

[0039] The energy absorbing layer is closer to the explosion-facing surface than the foam metal plate layer. The energy absorbing layer includes a plurality of energy absorbing layers arranged by tubular materials and combined vertically and horizontally. The structure of filling the energy absorbing tube with the first energy absorbing material is adopted. Compared with directly using soft energy absorbing materials, it is easier to fix and has a good energy absorbing effect. The combination of the foam metal with the first energy absorbing material and the second energy absorbing material can increase the energy absorption by more than 50% and the energy absorption efficiency by more than 30% compared with using the first energy absorbing material and the second energy absorbing material alone, and has a good energy absorbing effect.

[0040] The front side of the metal plate located in front of the middle steel plate layer is the explosion-proof surface, and the metal plate located in the back of the middle steel plate layer is the back explosion surface. The steel plate layer coated with the explosion-proof coating in front of the middle steel plate layer bears the first impact of the shock wave, and after its impact deformation, the criss-crossed energy-absorbing tubes absorb the energy for the first time; the steel plate layer in the middle coated with the explosion-proof coating bears the secondary impact of the shock wave. At this time, the shock wave is weakened, and the energy absorption of the foam metal plate layer with a hardness greater than that of the criss-crossed energy-absorbing tubes is required. Finally, the metal plate coated with the explosion-proof coating on the back of the middle steel plate layer finally bears the remaining shock wave energy. The use of a progressive impact-resistant structure can effectively absorb energy and resist explosion. Among the three steel plate layers, the steel plate layer in the middle is arranged on the rigid and flexible interface formed between the energy-absorbing layer and the foam metal plate layer, which can maximize the impact resistance.

[0041] 7. The explosion-proof door panels have high resistance and are not easy to deform. The structure does not contain materials such as concrete or foam concrete, is light in weight, and has low requirements for foundation bearing capacity, which reduces the difficulty of foundation construction in some areas with weak soil, shortens the construction period, and makes the site selection of ground protection projects unrestricted. The door body is light, and emergency repair and construction are convenient.

[0042] 8. The structure does not contain materials such as concrete or foam concrete. Under the dual effects of fragments and shock waves, all components are coated with explosion-proof coatings, and the materials will not cause secondary fragments to splash, which will provide a certain degree of protection for objects and personnel in the protective door.

[0043] 7. The outer surfaces of each steel plate layer, each energy-absorbing tube, foam metal plate layer, and connecting parts are sprayed with explosion-proof paint. The explosion-proof paint acts on each component of the explosion-proof door panel to ensure the integrity of each component when the explosion-proof door panel is impacted, thereby improving the explosion-proof effect and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of a door opening in the wall of a structure.

[0045] Figure 2 It is a structural schematic diagram of a preferred embodiment of a high-security explosion-proof door of the present invention.

[0046] Figure 3 yes Figure 2A cross-sectional view of the high-security explosion-proof door along A-A' is shown.

[0047] Figure 4 yes Figure 2 A state diagram of a high security explosion-proof door is shown.

[0048] Figure 5 yes Figure 2 A state diagram of a high security explosion-proof door is shown.

[0049] Figure 6 It is a structural schematic diagram of a preferred embodiment of a high-security explosion-proof door of the present invention.

[0050] Figure 7 It is a structural schematic diagram of a preferred embodiment of a high-security explosion-proof door of the present invention.

[0051] Figure 8 yes Figure 7 A state diagram of a high security explosion-proof door is shown.

[0052] Fig. 9 yes Figure 7 A state diagram of a high security explosion-proof door is shown.

[0053] Fig.10 It is a structural schematic diagram of a preferred embodiment of a high-security explosion-proof door of the present invention.

[0054] Fig.11 It is a structural schematic diagram of a preferred embodiment of a high-security explosion-proof door of the present invention.

[0055] Fig.12 It is a structural schematic diagram of a preferred embodiment of a high-security explosion-proof door of the present invention.

[0056] Fig.13 It is a front view of an explosion-proof door panel.

[0057] Fig.14 yes Fig.13 The explosion-proof door panel is shown in a cross-sectional view along line BB'.

[0058] Fig.15 yes Fig.14 A partial enlarged view of part D.

[0059] Fig.16 yes Fig.13 The explosion-proof door panel is shown in a cross-sectional view along the CC' line.

[0060] Fig.17 yes Fig.16 A partial enlarged view of part E.

[0061] Fig.18 It is a front view of an explosion-proof door panel.

[0062] Fig.19 18 is a cross-sectional view of the explosion-proof door panel along the FF' line.

[0063] Fig. 20 It is a structural schematic diagram of an explosion-proof door panel.

[0064] Fig.21 It is a structural schematic diagram of an explosion-proof door panel.

[0065] Among them: wall-1; mountain-11; door opening-2; door axis-21; embedded parts-22; explosion-proof door panel-3; clip 30; frame-31; connecting screws-32; steel plate layer-33; energy absorption layer 34; foam metal plate layer-35; each energy absorption layer-36; energy absorption tube-37; first energy absorption material-38; second energy absorption material-39; side plate-310; damping energy absorption device-4; connecting part-41; oblique-stayed explosion-proof door panel rotation device-5; winch device-51; cable-52; side explosion-proof panel-6; ground-7; plate pit-71 explosion-proof cover-8. DETAILED DESCRIPTION

[0066] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0067] Example 1. Figure 1-5 As shown, a high-security simple explosion-proof door for a cave or structure, a door opening 2 on a wall 1 of the structure, the explosion-proof door comprises an explosion-proof door panel 3, a plurality of damping energy absorbing devices 4, and an explosion-proof door panel rotating device, and gaps are left between the two sides of the explosion-proof door panel 3 and the door opening; the damping energy absorbing device 4 is arranged on the wall 1 of the structure above the door opening 2.

[0068] An embedded part 22 is provided below the ground 7 in the door opening 2 , a rotatable and transversely arranged door shaft 21 is connected to the embedded part 22 , and the bottom end of the explosion-proof door panel 3 is connected to the door shaft 21 ; a plate pit 71 is provided on the ground 7 in front of the door opening 2 .

[0069] The explosion-proof door panel rotating device is a diagonal explosion-proof door panel rotating device 5;

[0070] The oblique-pull explosion-proof door panel rotating device 5 comprises a hoisting device 51 arranged at the upper end of the door opening 2 or near the upper edge of the door opening 2, and the hoisting device 51 is connected to the explosion-proof door panel 3 through a cable 52;

[0071] When the rear side surface of the explosion-proof door panel 3 contacts the damping energy absorbing device 4, the angle between the explosion-proof door panel 3 and the ground 7 is not less than 60 degrees; when the explosion-proof door panel 3 rotates clockwise along its bottom end and falls into the plate pit 71, the rear side surface of the explosion-proof door panel 3 can be made flush with the ground 7; when the rear side surface of the explosion-proof door panel 3 contacts the damping energy absorbing device 4 and the front of the explosion-proof door panel 3 is impacted by the explosion, the explosion-proof door panel 3 rotates along its bottom end and its rear side surface squeezes the damping energy absorbing device 4 and closes the door opening 2.

[0072] The damping energy absorbing device is made of one or more of butyl, acrylate, polysulfide, nitrile, silicone rubber, polyurethane, polyvinyl chloride, epoxy resin, butyl rubber, and polyurethane.

[0073] like Figure 13-17 As shown, the explosion-proof door panel 3 includes three steel plate layers 33, an energy absorbing layer 34, a foam metal plate layer 35, and a connecting piece arranged in parallel with each other. The energy absorbing layer 34 includes a plurality of energy absorbing layers 36, and each energy absorbing layer 36 includes a plurality of energy absorbing tubes 37 arranged in parallel with each other.

[0074] The energy absorbing tube 37 of each energy absorbing layer 36 is filled with a first energy absorbing material 38 .

[0075] The energy absorbing tubes 37 of two adjacent energy absorbing layers 36 are perpendicular to each other; among the three steel plate layers 33, an energy absorbing layer 34 is provided between the middle steel plate layer 33 and the steel plate layer 33 located in front of the middle steel plate layer 33, and a foam metal plate layer 35 is provided between the middle steel plate layer 33 and the steel plate layer 33 located in the rear of the middle steel plate layer 33;

[0076] The connecting parts are a plurality of connecting screws 32. The steel plate layer 33 located in front of the middle steel plate layer 33 is connected to the steel plate layer 33 located in the rear of the middle steel plate layer 33 by a plurality of connecting screws 32 passing through the energy absorbing layer 34 and the foam metal plate layer 35. The outer surfaces of each steel plate layer 33, each energy absorbing tube 37 and the foam metal plate layer 35 are sprayed with explosion-proof paint. The energy absorbing tube 37 is an energy absorbing tube 37 made of carbon fiber; the first energy absorbing material 38 is hard polyurethane foam, and the second energy absorbing material 39 is soft polyurethane foam; the foam metal plate layer 35 is a foam metal plate layer 35 made of foam aluminum; and each steel plate layer 33 is a steel plate layer 33 made of steel.

[0077] When the rear side of the explosion-proof door panel 3 contacts the damping energy absorbing device 4 and the front of the explosion-proof door panel 3 is impacted by the explosion, the explosion-proof door panel rotates along its bottom end to squeeze the damping energy absorbing device 4 and seal the door opening 2. The explosion-proof door panel 3 falls under its own weight after compressing the damping energy absorbing device. If the explosion is very close to the explosion-proof door panel 3, an explosion pit is formed in the explosion-proof door panel 3. The falling of the explosion-proof door panel 3 will also cover the explosion pit formed in front of the door, which will buy precious time for the machinery inside the door, especially aircraft, vehicles and other machinery with high requirements on the road surface, to quickly drive out of the door and put into use.

[0078] When the rear side of the explosion-proof door panel 3 contacts the damping energy absorbing device 4 and the front of the explosion-proof door panel 3 is impacted by the explosion, the explosion-proof door panel 3 compresses the damping energy absorbing device 4. While the damping energy absorbing device 4 absorbs energy, it delays the time for the explosion shock wave to act on the explosion-proof door panel 3. The self-weight of the explosion-proof door panel 3 can offset the impact force generated by the explosion, thereby effectively reducing the destructive force of the explosion on the explosion-proof door panel 3.

[0079] The explosion-proof door panel rotating device is located inside the door opening 2 and is not easily damaged by the explosion.

[0080] The door shaft 21 is located below the ground 7 and is retracted into the door opening 2. The door shaft 21 is low and buried, and is not easily damaged by explosion. The whole device is very safe and effective.

[0081] The structure is simple, easy to transport and install, and convenient to install and maintain.

[0082] A structure is provided in which three steel plate layers 33 coated with explosion-proof coating sandwich an energy absorbing layer 34 and a foam metal plate layer 35, and the three steel plate layers 33 form a hard skeleton.

[0083] The energy absorbing layer 34 is closer to the explosion-facing surface than the foam metal plate layer 35. The energy absorbing layer 34 includes a plurality of energy absorbing layers arranged by tubular materials and combined vertically and horizontally. The structure of filling the energy absorbing tube with the first energy absorbing material 38 is easier to fix and has a good energy absorbing effect than directly using soft energy absorbing materials. The use of foam metal in combination with the first energy absorbing material 38 and the second energy absorbing material 39 can increase the energy absorption by more than 50% and the energy absorption efficiency by more than 30% compared with using the first energy absorbing material and the second energy absorbing material alone, and has a good energy absorbing effect.

[0084] The front side of the metal plate on the front side of the middle steel plate layer 33 is the explosion-proof surface, and the metal plate on the back side of the middle steel plate layer 33 is the back explosion surface. The steel plate layer 33 on the front side of the middle steel plate layer 33 bears the first impact of the shock wave, and after the impact deformation, the criss-crossed energy absorption tubes 37 absorb the first energy; the steel plate layer 33 on the middle side with the explosion-proof coating bears the secondary impact of the shock wave, at this time the shock wave is weakened, and the energy absorption of the foam metal plate layer 35 with a hardness greater than the criss-crossed energy absorption tubes 37 is required, and finally, the metal plate on the back side of the middle steel plate layer 33 bears the rest of the shock wave energy. The progressive impact-resistant structure can effectively absorb energy and resist explosion. Among the three steel plate layers, the steel plate layer 33 on the middle side is arranged on the rigid and flexible interface formed between the energy absorption layer 34 and the foam metal plate layer 35, which can maximize the impact resistance.

[0085] Explosion-proof door panels 3 have high resistance and are not easy to deform. The structure does not contain materials such as concrete or foam concrete, is light in weight, and has low requirements for foundation bearing capacity, which reduces the difficulty of foundation construction in some areas with weak soil, shortens the construction period, and makes the site selection of ground protection projects unrestricted. The door body is light, and emergency repair and construction are convenient.

[0086] The structure does not contain materials such as concrete or foam concrete. Under the dual effects of fragments and shock waves, each component is coated with an explosion-proof coating, and the material will not cause secondary fragments to splash, which will provide a certain degree of protection for objects and personnel in the protective door.

[0087] The outer surfaces of each steel plate layer 33, each energy absorbing tube, foam metal plate layer 35, and connecting parts are sprayed with explosion-proof paint, which acts on each component of the explosion-proof door panel 3 to ensure the integrity of each component when the explosion-proof door panel 3 is impacted, thereby improving the explosion-proof effect and reducing the cost.

[0088] The thickness of the foam metal layer 35 is 3-6 times the thickness of the frontmost steel layer; the diameter of the energy absorbing tube is 3-5 times the thickness of the frontmost steel layer; the thickness of the middle plate layer and the rearmost steel layer is less than the thickness of the frontmost steel layer. The surface density of the explosion-proof door panel is not more than 400kg / m 2 , thickness is not more than 450mm. After testing, it can resist the fragments and shock waves of a 1000-pound MK83 explosion 5m away from the door. The fragments can be evaluated and tested according to the 54-type 12.7mm armor-piercing incendiary bomb at 30m. The shock wave is based on the explosion similarity criterion, and is equivalent to the shock wave overpressure of a 1000-pound MK83 aerial bomb explosion at a distance of 1.4m from the protective door.

[0089] Example 2. Fig.10 As shown, the difference between this embodiment and embodiment 1 is that an explosion-proof cover 8 is provided on the wall 1 of the structure above the door opening 2, and the damping energy absorption device 4 is connected to the explosion-proof cover 8 through a connecting piece 41. The explosion-proof cover 8 is made of a steel plate, and an explosion-proof coating is applied on the explosion-proof cover 8. The explosion-proof cover 8 has a certain protective effect on the door opening 2, and plays a protective role on the explosion-proof door plate rotating device, the door shaft 21, etc.

[0090] Example 3. Fig.11 As shown, the difference between this embodiment and embodiment 1 is that an explosion-proof cover 8 is provided on the wall 1 of the structure above the door opening 2. The explosion-proof cover 8 is made of a steel plate, and an explosion-proof coating is applied on the explosion-proof cover 8.

[0091] The left and right sides of the bottom surface of the explosion-proof cover 8 are symmetrically connected with side explosion-proof plates 6; the side explosion-proof plates 6 are perpendicular to the front side of the door opening and perpendicular to the ground; the explosion-proof door panel 3 is located between the explosion-proof plates 6 on both sides.

[0092] The distance between the bottom surface of the explosion-proof cover 8 and the door shaft 21 is slightly larger than the distance between the top surface of the explosion-proof door panel 3 and the door shaft 21; the distance between the front end of the explosion-proof cover 8 and the front side surface of the door opening 2 is larger than the distance between the front end of the top surface of the explosion-proof door panel 3 and the front side surface of the wall 1.

[0093] The front side of each side explosion-proof plate 6 is flush with the front side of the explosion-proof cover 8. The explosion-proof cover 8 and the side explosion-proof plate 6 are provided to protect the door opening 2 to a certain extent, and to protect the explosion-proof door plate rotating device, the door shaft 21, etc.

[0094] Example 4. Figure 7-9 As shown, the difference between this embodiment and embodiment 1 is that the door opening 2 is a door opening 2 on a cavern of a mountain 11 , and the damping energy absorbing device 4 is arranged on the mountain 11 above the door opening 2 .

[0095] Example 5. Fig.12 As shown, the difference between this embodiment and embodiment 3 is that the angle between the front side surface of each side explosion-proof plate 6 and the ground is greater than the angle between the explosion-proof door plate 3 and the ground 7.

[0096] Example 6. Figure 18-19 As shown, the difference between this embodiment and embodiment 1 is that the energy absorbing tubes 37 of each energy absorbing layer 36 are filled with a second energy absorbing material 39. The connecting member is a frame 31, and each steel plate layer 33, each foam metal plate layer 35, and the energy absorbing layer 34 are installed on the frame 31. The outer surfaces of each steel plate layer 33, each energy absorbing tube 37, each foam metal plate layer 35, and the frame 31 are sprayed with explosion-proof paint.

[0097] Example 7. Fig. 20 As shown, the difference between this embodiment and embodiment 1 is that the connecting member is a plurality of clips 30, and the steel plate layer 33 located in front of the middle steel plate layer 33 is connected with the steel plate layer 33 located in the rear of the middle steel plate layer 33 through the clips 30. The outer surfaces of each steel plate layer 33, each energy absorbing tube 37, the foam metal plate layer 35, and the clips 30 are sprayed with anti-explosion paint.

[0098] Example 8. Fig.21 As shown, the difference between this embodiment and embodiment 1 is that the connecting piece is a steel side plate 310, and the steel plate layer 33 located in front of the middle steel plate layer 33 and the steel plate layer 33 located in the back of the middle steel plate layer 33 are welded to the side plate 310. The outer surfaces of each steel plate layer 333, each energy absorbing tube 37, the foam metal plate layer 35, and the side plate 310 are sprayed with explosion-proof paint.

Claims

1. A high-security simple explosion-proof door for a cavern or a structure, installed on a door opening (2) of the cavern or the structure, wherein the door opening (2) is a door opening (2) on a cavern of a mountain (11) or a door opening (2) on a wall (1) of a structure, characterized in that: The explosion-proof door comprises an explosion-proof door plate (3), a plurality of damping energy absorbing devices (4), and an explosion-proof door plate rotating device, and gaps are left between the two sides of the explosion-proof door plate (3) and the door opening; the damping energy absorbing device (4) is arranged on a mountain (11) above the door opening (2) or on a wall (1) of a structure above the door opening (2); An embedded part (22) is provided below the ground (7) in the door opening (2), a rotatable door shaft (21) is connected to the embedded part (22), and the bottom end of the explosion-proof door panel (3) is connected to the door shaft (21); a plate pit (71) is provided on the ground (7) in front of the door opening (2); The explosion-proof door panel rotating device is a diagonal explosion-proof door panel rotating device (5); The oblique-stayed explosion-proof door panel rotating device (5) comprises a hoisting device (51) arranged at the upper end of the door opening (2) or near the upper edge of the door opening (2), and the hoisting device (51) is connected to the explosion-proof door panel (3) via a cable (52); When the rear side of the explosion-proof door panel (3) contacts the damping energy absorbing device (4), the angle between the explosion-proof door panel (3) and the ground (7) is not less than 60 degrees; when the explosion-proof door panel (3) rotates clockwise along its bottom end and falls into the plate pit (71), the rear side of the explosion-proof door panel (3) can be flush with the ground (7); when the rear side of the explosion-proof door panel (3) contacts the damping energy absorbing device (4) and the front of the explosion-proof door panel (3) is impacted by the explosion, the explosion-proof door panel (3) rotates along its bottom end and its rear side presses the damping energy absorbing device (4) and closes the door opening; When the damping energy absorption device (4) is squeezed to the limit, the angle between the explosion-proof door panel (3) and the ground (7) is not less than 80 degrees; An explosion-proof cover (8) is provided on the mountain (11) above the door opening (2) or on the wall (1) of the structure above the door opening (2).

2. The high-security simple explosion-proof door for a cave or structure as claimed in claim 1, characterized in that: The left and right sides of the bottom surface of the explosion-proof cover (8) are symmetrically connected with side explosion-proof plates (6); the side explosion-proof plates (6) are perpendicular to the front side of the door opening and perpendicular to the ground; and the explosion-proof door plate (3) is located between the two side explosion-proof plates (6).

3. The high-security simple explosion-proof door for a cave or structure as claimed in claim 2, characterized in that: The damping energy absorbing device (4) is connected to the explosion-proof cover (8) via a connecting piece (41).

4. The high-security simple explosion-proof door for a cave or structure as claimed in claim 2, characterized in that: The distance between the bottom surface of the explosion-proof cover (8) and the door shaft (21) is slightly greater than the distance between the top surface of the explosion-proof door plate (3) and the door shaft (21); the distance between the front end of the explosion-proof cover (8) and the front side surface of the door opening (2) is greater than the distance between the front end of the top surface of the explosion-proof door plate (3) and the front side surface of the wall (1).

5. The high-security simple explosion-proof door for a cave or structure as claimed in claim 4, characterized in that: The front side of each side explosion-proof plate (6) is flush with the front side of the explosion-proof cover (8).

6. The high-security simple explosion-proof door for a cave or structure as claimed in claim 5, characterized in that: The angle between the front side surface of the explosion-proof panels (6) on each side and the ground is greater than the angle between the explosion-proof door panel (3) and the ground (7).

7. The high-security simple explosion-proof door for a cave or structure as claimed in claim 1, characterized in that: The explosion-proof door panel (3) comprises three steel plate layers (33) arranged in parallel with each other, an energy absorption layer (34), a foam metal plate layer (35), and a connecting piece, wherein the energy absorption layer (34) comprises a plurality of energy absorption layers (36), and each energy absorption layer (36) comprises a plurality of energy absorption tubes (37) arranged in parallel with each other; The energy absorbing tube (37) of each energy absorbing layer (36) is filled with a first energy absorbing material (38), or, The energy absorbing tubes (37) of each energy absorbing layer (36) are filled with a second energy absorbing material (39), or, The energy absorbing tubes (37) of each energy absorbing layer (36) are filled with a first energy absorbing material (38), and the space between the energy absorbing tubes (37) of each energy absorbing layer (36) is filled with a second energy absorbing material (39); The energy absorbing tubes (37) of two adjacent energy absorbing layers (36) are perpendicular to each other; among the three steel plate layers (33), an energy absorbing layer (34) is provided between the steel plate layer (33) located in the middle and the steel plate layer (33) located in front of the steel plate layer (33), and a foam metal plate layer (35) is provided between the steel plate layer (33) located in the middle and the steel plate layer (33) located in the rear of the steel plate layer (33); The connecting members are a plurality of connecting screws (32), and the steel plate layer (33) located in front of the middle steel plate layer (33) is connected to the steel plate layer (33) located in the rear of the middle steel plate layer (33) via a plurality of connecting screws (32) that pass through the energy absorbing layer (34) and the foam metal plate layer (35), and the outer surfaces of each steel plate layer (33), each energy absorbing tube (37), the foam metal plate layer (35), and the connecting screws (32) are sprayed with explosion-proof paint, or, The connecting member is a square-shaped frame (31), each steel plate layer (33), each foam metal plate layer (35), and the energy absorption layer (34) are mounted on the frame (31), and the outer surfaces of each steel plate layer (33), each energy absorption tube (37), the foam metal plate layer (35), and the frame (31) are sprayed with explosion-proof paint, or, The connecting members are a plurality of clips (30), the steel plate layer (33) located in front of the middle steel plate layer (33) and the steel plate layer (33) located in the rear of the middle steel plate layer (33) are connected via the clips (30), and the outer surfaces of each steel plate layer (33), each energy absorbing tube (37), the foam metal plate layer (35), and the clips (30) are sprayed with explosion-proof paint, or, The connecting member is a side plate (310), and the steel plate layer (33) located in front of the middle steel plate layer (33) and the steel plate layer (33) located in the rear of the middle steel plate layer (33) are welded to the side plate (310), and the outer surfaces of each steel plate layer (33), each energy absorbing tube (37), the foam metal plate layer (35), and the side plate (310) are sprayed with explosion-proof paint.

8. The high-security simple explosion-proof door for a cave or structure as claimed in claim 7, characterized in that: The energy absorbing tube (37) is an energy absorbing tube (37) made of carbon fiber; the first energy absorbing material (38) is hard polyurethane foam, and the second energy absorbing material (39) is soft polyurethane foam; the foam metal plate layer (35) is a foam metal plate layer (35) made of foam aluminum; and each steel plate layer (33) is a steel plate layer (33) made of steel.

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