Explosion-proof civil air defense door

Abstract

The invention discloses an anti-explosion civil air defense door, and relates to the technical field of civil air defense doors. The civil air defense door comprises a wall body, a rotating shaft is rotationally connected to the interior of the wall body, a civil air defense door body is rotationally connected to the rotating shaft, and a thickening layer is fixedly connected to one side of the civil air defense door body. The device is provided with a buffer mechanism and an ejection piece, when explosion occurs, after a buffer plate is subjected to impact and extrusion force, a second buffer spring can be extruded to contract, a connecting block extrudes a damper and a first buffer spring to contract, and through multiple cooperation of the damper, the first buffer spring and the second buffer spring, the buffering effect is improved. According to the civil air defense door, buffering protection can be effectively conducted on explosion impact force borne by the civil air defense door body, the anti-explosion effect of the civil air defense door body is greatly improved, damage to the civil air defense door body is reduced, energy absorption and dispersion are effectively conducted, meanwhile, an ejection piece is driven to operate through movement of a sliding block, and the safety of the civil air defense door is improved. And the stability of the civil air defense door body during explosion can be improved again.

Description

Technical Field

[0001] This application relates to the technical field of civil air defense doors, and particularly to an explosion-proof civil air defense door. Background Art

[0002] Civil air defense doors, full name People's Air Defense Doors, are special protective doors designed to safeguard people's lives and property. They are mainly used in civil air defense projects such as air-raid shelters and underground bunkers to resist damage during air raids and other wars or disasters. Civil air defense doors are an indispensable part of the modern urban defense system and are of great significance for improving the overall urban protection ability.

[0003] Existing explosion-proof civil air defense doors are a special type of safety door, mainly used in civil air defense projects such as air-raid basements and underground bunkers to provide additional protective measures. They are usually made of strong steel materials and are equipped with special sealing systems to ensure that when an explosion occurs, the door can effectively block shock waves and potentially accompanying toxic gases from entering. The design and manufacture of explosion-proof civil air defense doors need to comply with strict safety standards to ensure reliability and durability under extreme conditions.

[0004] Currently, traditional civil air defense doors usually use thick steel plate structures to resist explosion shocks. Although they have a certain level of protection ability, when faced with high-intensity explosion shocks, the anti-explosion performance of these doors is not ideal. Due to the single structure of the door body and the lack of effective energy absorption and dispersion mechanisms, once subjected to an explosion, the door body is prone to deformation or damage, resulting in the failure of the protection function. For this reason, this application provides an explosion-proof civil air defense door. Summary of the Invention

[0005] The purpose of this application is to solve the problem that when faced with high-intensity explosion shocks, the anti-explosion performance of these doors is not ideal due to the single structure of the door body and the lack of effective energy absorption and dispersion mechanisms. This application provides an explosion-proof civil air defense door.

[0006] To achieve the above purpose, this application specifically adopts the following technical solutions: An explosion-proof civil air defense door, including a wall body. A rotating shaft is rotatably connected inside the wall body, and a civil air defense door body is rotatably connected to the rotating shaft. A thickened layer is fixedly connected to one side of the civil air defense door body. A threshold is slidably arranged at the bottom of the rotating shaft. An adjusting mechanism is installed inside the civil air defense door body. A fixing frame is fixedly connected inside the civil air defense door body. A buffer plate is installed inside the civil air defense door body. A buffer mechanism is installed inside the civil air defense door body. An ejecting member is installed inside the civil air defense door body.

[0007] By adopting the above technical solution, first, the civil air defense door body is driven to drive the thickened layer to rotate around the rotating shaft, so as to drive the threshold at the bottom to gradually retract into the interior of the civil air defense door body. Through the retraction of the threshold, when the civil air defense door body is in the open state, it can not affect the normal passage of vehicles and pedestrians. When an emergency occurs and it is necessary to close the civil air defense door body for protection, the threshold will be gradually lowered until after the civil air defense door body is completely closed, the threshold at the bottom will also be completely attached to the ground, so as to maintain the overall tightness of the civil air defense door body, greatly improving the safety level of the civil air defense door body. When an explosion occurs, the buffer component can effectively buffer and protect the explosion impact force received by the civil air defense door body, greatly improving the explosion-proof effect of the civil air defense door body, reducing the damage received by the civil air defense door body, effectively absorbing and dispersing energy. At the same time, the buffer component can also drive the ejector to operate, so that the civil air defense door body can maintain more stability with the wall during the explosion impact, thus protecting the safety of internal personnel and equipment, and preventing the civil air defense door body from deforming or falling off, so as to lose its protective function.

[0008] Further, the adjusting mechanism includes a first bevel gear fixedly connected to the rotating shaft. A bidirectional lead screw is rotatably connected inside the fixed frame. One end of the bidirectional lead screw is fixedly connected to a second bevel gear. The second bevel gear is meshed with the first bevel gear. Two lead screw sleeves are symmetrically threadedly connected to the bidirectional lead screw. The bottoms of the two lead screw sleeves are both rotatably connected to articulated rods. The ends of the articulated rods away from the lead screw sleeves are both rotatably connected to the top of the threshold.

[0009] By adopting the above technical solution, while the civil air defense door body drives the rotating shaft to rotate, it drives the threshold at the bottom to gradually retract into the interior of the civil air defense door body. Through the retraction of the threshold, when the civil air defense door body is in the open state, it can not affect the normal passage of vehicles and pedestrians.

[0010] Further, two positioning shafts are symmetrically and fixedly connected inside the civil air defense door body. The two articulated rods are respectively rotatably connected to the two positioning shafts.

[0011] By adopting the above technical solution, the two separated lead screw sleeves drive the two articulated rods at the bottom to rotate around the positioning shafts, so that one end of the two articulated rods drives the threshold at the bottom to gradually rise.

[0012] Furthermore, the buffer mechanism includes a plurality of fixed blocks symmetrically and fixedly connected to one side inside the civil air defense door body. One side of each of the plurality of fixed blocks is fixedly connected to a damper. The end of the damper away from the fixed block is fixedly connected to a connecting block. One end of the connecting block is fixedly connected to one end of a buffer plate. A first buffer spring is sleeved on the damper. One end of the first buffer spring is fixedly connected to the fixed block, and the other end of the first buffer spring is fixedly connected to the connecting block.

[0013] By adopting the above technical solution, since both the upper and lower sides of the buffer plate are fixedly connected to the connecting block, the connecting block will be driven to displace together, thereby causing the connecting block to squeeze the damper and the first buffer spring to contract, effectively buffering and protecting the civil air defense door body from the explosion impact force.

[0014] Furthermore, fixed columns are fixedly connected to the opposite surfaces of the two fixed blocks. Two sliding blocks are symmetrically and slidably connected to the fixed columns. One side of each of the two sliding blocks is rotatably connected to a rotating plate. One end of each of the two rotating plates away from the sliding block is rotatably connected to one side of the buffer plate.

[0015] By adopting the above technical solution, after the buffer plate is subjected to the impact extrusion force, it will push the two rotating plates to rotate, causing one end of the rotating plate to push the sliding block to slide on the fixed column.

[0016] Furthermore, two second buffer springs are symmetrically and fixedly connected to the fixed columns. One end of each of the second buffer springs is fixedly connected to the fixed block, and the other end of the second buffer spring is fixedly connected to the sliding block.

[0017] By adopting the above technical solution, as the rotating plate rotates, it will cause one end of the rotating plate to push the sliding block to slide on the fixed column, thereby squeezing the second buffer spring to contract, effectively buffering and protecting the civil air defense door body from the explosion impact force.

[0018] Furthermore, the ejecting member includes a support block fixedly connected to one side of the sliding block. One end of the support block is beveled. Two fixing plates are symmetrically and fixedly connected inside the civil air defense door body. Transmission blocks are slidably connected inside each of the two fixing plates. Both ends of the transmission block are beveled. One of the beveled surfaces of the transmission block is slidably connected to the beveled surface of the support block. A jacking block is slidably connected to the other beveled surface of the transmission block. A baffle is slidably arranged on the top of the civil air defense door body. The bottom of the baffle is fixedly connected to the tops of the two jacking blocks. A card slot matching the size of the baffle is opened at the top of the wall.

[0019] By adopting the above technical solution, through the cooperation between the baffle plate and the clamping groove, when the civil air defense door body is subjected to an explosion impact, the connection stability between the civil air defense door body and the wall can be strengthened again, so that the civil air defense door body can maintain more stability with the wall during the explosion impact.

[0020] Furthermore, dovetail blocks are fixedly connected to the inclined surfaces of the support block and the jacking block, dovetail grooves are formed in the inclined surfaces at both ends of the transmission block, and the dovetail blocks are slidably connected in the dovetail grooves.

[0021] By adopting the above technical solution, since the dovetail block on the inclined surface of the support block is slidably connected to the dovetail groove on the inclined surface of the transmission block, when the support block moves, the transmission block will be extruded to slide inside the fixed plate.

[0022] In summary, the present application includes at least one of the following beneficial effects: 1. In the present application, a buffer mechanism and an ejecting member are provided. When an explosion occurs, after the buffer plate is subjected to the impact extrusion force, the buffer spring II will be extruded to contract, and the connecting block will squeeze the damper and the buffer spring I to contract. Through the multiple cooperation of the damper, the buffer spring I and the buffer spring II, the explosion impact force received by the civil air defense door body can be effectively buffered and protected, greatly improving the explosion-proof effect of the civil air defense door body, reducing the damage received by the civil air defense door body, effectively absorbing and dispersing energy, making the door body not easily deformed or damaged, so as to avoid the failure of the protection function. At the same time, the movement of the sliding block will also drive the ejecting member to operate together, which can further improve the stability of the civil air defense door body when an explosion occurs.

[0023] 2. In the present application, a support block, a transmission block, a baffle plate and a clamping groove are provided. When the sliding block slides on the fixed column, the transmission block will be extruded to slide by the support block, thereby driving the baffle plate to be jacked upward into the inside of the clamping groove. Through the cooperation between the baffle plate and the clamping groove, when the civil air defense door body is subjected to an explosion impact, the connection stability between the civil air defense door body and the wall can be strengthened again, so that the civil air defense door body can maintain more stability with the wall during the explosion impact, thereby protecting the safety of internal personnel and equipment, and preventing the civil air defense door body from deforming or falling off, thus losing its protection function.

[0024] 3. This application is provided with an adjustment mechanism. When the civil air defense door body drives the rotating shaft to rotate, it will drive the threshold at the bottom to gradually retract into the interior of the civil air defense door body. Through the retraction of the threshold, when the civil air defense door body is in the open state, it can not affect the normal passage of vehicles and pedestrians. When an emergency occurs, the civil air defense door body can be pushed to close normally. During the closing process, the threshold will be gradually lowered until after the civil air defense door body is completely closed, the threshold at the bottom will also be completely fitted with the ground, so as to maintain the overall tightness of the civil air defense door body and greatly improve the safety level of the civil air defense door body. Brief Description of the Drawings

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the device main body in this application.

[0026] Figure 2 It is a sectional view of the device main body in this application.

[0027] Figure 3 It is an internal structural schematic diagram of the device main body in this application.

[0028] Figure 4 It is a side view of the device main body in this application.

[0029] Figure 5 It is a three-dimensional structural schematic diagram of the ejecting member in this application.

[0030] Description of the Reference Signs: 1, wall; 2, rotating shaft; 3, civil air defense door body; 31, thickened layer; 4, threshold; 5, bevel gear one; 6, fixing bracket; 7, bidirectional lead screw; 8, bevel gear two; 9, lead screw sleeve; 10, articulated rod; 11, positioning shaft; 12, buffer plate; 13, fixing block; 14, damper; 15, connecting block; 16, buffer spring one; 17, fixing column; 18, sliding block; 19, rotating plate; 20, buffer spring two; 21, supporting block; 22, fixing plate; 23, transmission block; 24, jacking block; 25, baffle; 26, card slot; 27, dovetail block; 28, dovetail groove. Detailed Description of the Embodiment

[0031] The following further describes this application in detail Figures 1-5 with reference to the accompanying drawings.

[0032] The embodiment of this application discloses an explosion-proof civil air defense door.

[0033] Refer to Figure 1 , Figure 3 and Figure 4, an explosion-proof civil air defense door, including a wall body 1. A rotating shaft 2 is rotatably connected inside the wall body 1. A civil air defense door body 3 is rotatably connected to the rotating shaft 2. A thickening layer 31 is fixedly connected to one side of the civil air defense door body 3. A threshold 4 is slidably arranged at the bottom of the rotating shaft 2. An adjusting mechanism is installed inside the civil air defense door body 3. A fixed frame 6 is fixedly connected inside the civil air defense door body 3. A buffer plate 12 is installed inside the civil air defense door body 3. A buffer mechanism is installed inside the civil air defense door body 3. An ejecting member is installed inside the civil air defense door body 3; Secondly, the buffer mechanism includes a plurality of fixed blocks 13 symmetrically and fixedly connected to one side inside the civil air defense door body 3. A damper 14 is fixedly connected to one side of each of the plurality of fixed blocks 13. One end of the damper 14 far from the fixed block 13 is fixedly connected to a connecting block 15. One end of the connecting block 15 is fixedly connected to one end of the buffer plate 12. A first buffer spring 16 is sleeved on the damper 14. One end of the first buffer spring 16 is fixedly connected to the fixed block 13, and the other end of the first buffer spring 16 is fixedly connected to the connecting block 15. Fixed columns 17 are fixedly connected to the opposite surfaces of the two fixed blocks 13. Two sliding blocks 18 are symmetrically and slidably connected to the fixed columns 17. One side of each of the two sliding blocks 18 is rotatably connected to a rotating plate 19. One end of each of the two rotating plates 19 far from the sliding block 18 is rotatably connected to one side of the buffer plate 12. Two second buffer springs 20 are symmetrically and fixedly connected to the fixed columns 17. One end of the second buffer spring 20 is fixedly connected to the fixed block 13, and the other end of the second buffer spring 20 is fixedly connected to the sliding block 18.

[0034] During use, first, push the civil air defense door body 3 to drive the thickening layer 31 to rotate around the rotating shaft 2 to open the civil air defense door body 3. While the civil air defense door body 3 drives the rotating shaft 2 to rotate, it will drive the adjusting mechanism inside the civil air defense door body 3 to operate, so as to drive the bottom threshold 4 to gradually retract into the civil air defense door body 3. By retracting the threshold 4, when the civil air defense door body 3 is in the open state, it can not affect the normal passage of vehicles and pedestrians. When an emergency occurs and it is necessary to close the civil air defense door body 3 for protection, the civil air defense door body 3 can be normally pushed to close. During the closing process, the rotation of the rotating shaft 2 will drive the adjusting component to operate again to gradually lower the threshold 4 until after the civil air defense door body 3 is completely closed, the bottom threshold 4 will also be completely attached to the ground, so as to maintain the overall tightness of the civil air defense door body 3 and greatly improve the safety level of the civil air defense door body 3; Secondly, when an explosion occurs, one side of the civil air defense door body 3 will be subjected to a violent impact and deformed. Therefore, the force received by one side of the civil air defense door body 3 will be transmitted to the internal buffer plate 12. After the buffer plate 12 is subjected to the impact and extrusion force, it will push two rotating plates 19 to rotate. As the rotating plates 19 rotate, one end of the rotating plates 19 will push the sliding block 18 to slide on the fixed column 17, so as to squeeze the second buffer spring 20 to contract. And when the buffer plate 12 is displaced due to the impact, since both the upper and lower sides of the buffer plate 12 are fixedly connected to the connecting block 15, the connecting block 15 will be driven to displace together, so that the connecting block 15 squeezes the damper 14 and the first buffer spring 16 to contract. Through the multiple cooperation of the damper 14, the first buffer spring 16 and the second buffer spring 20, the explosion impact force received by the civil air defense door body 3 can be effectively buffered and protected, greatly improving the explosion-proof effect of the civil air defense door body 3, reducing the damage received by the civil air defense door body 3, effectively absorbing and dispersing energy, making the door body not easily deformed or damaged, so as to avoid the failure of the protection function; In addition, when the sliding block 18 slides on the fixed column 17, it will drive the ejector inside the civil air defense door body 3 to operate at the same time. Through the operation of the ejector, when the civil air defense door body 3 is subjected to an explosion impact, the connection stability between the civil air defense door body 3 and the wall 1 can be strengthened again, so that the civil air defense door body 3 can maintain more stability with the wall 1 during the explosion impact, thereby protecting the safety of the internal personnel and equipment, so as to avoid the deformation or detachment of the civil air defense door body 3, and thus lose the protection function.

[0035] Refer to Figure 1 and Figure 2 As shown in, the adjusting mechanism includes a first bevel gear 5 fixedly connected to the rotating shaft 2. A bidirectional lead screw 7 is rotatably connected inside the fixed frame 6. One end of the bidirectional lead screw 7 is fixedly connected to a second bevel gear 8. The second bevel gear 8 is meshed with the first bevel gear 5. Two lead screw sleeves 9 are symmetrically threadedly connected to the bidirectional lead screw 7. The bottoms of the two lead screw sleeves 9 are respectively rotatably connected to hinge rods 10. The ends of the hinge rods 10 far away from the lead screw sleeves 9 are respectively rotatably connected to the top of the threshold 4. Two positioning shafts 11 are symmetrically and fixedly connected inside the civil air defense door body 3. The two hinge rods 10 are respectively rotatably connected to the two positioning shafts 11.

[0036] While the civil air defense door body 3 drives the rotating shaft 2 to rotate, the bevel gear one 5 on the civil air defense door body 3 will rotate along with the rotating shaft 2. Since the bevel gear one 5 meshes with the bevel gear two 8, when the bevel gear one 5 rotates, it will drive the bevel gear two 8 to rotate together, thereby driving the bidirectional lead screw 7 to rotate inside the fixed frame 6 through the bevel gear two 8. As the bidirectional lead screw 7 rotates, the two lead screw sleeves 9 will gradually move away from each other on the bidirectional lead screw 7. The two hinge rods 10 at the bottom will be driven to rotate around the positioning shaft 11 by the two moving-away lead screw sleeves 9. Therefore, one end of the two hinge rods 10 will drive the bottom threshold 4 to gradually rise, thereby driving the bottom threshold 4 to gradually retract into the civil air defense door body 3. By retracting the threshold 4, when the civil air defense door body 3 is in the open state, it can not affect the normal passage of vehicles and pedestrians. When an emergency occurs and it is necessary to close the civil air defense door body 3 for protection, the civil air defense door body 3 can be pushed to close normally. During the closing process, the rotation of the rotating shaft 2 will drive the bevel gear one 5 to rotate in the reverse direction again, so that the two lead screw sleeves 9 gradually approach each other on the bidirectional lead screw 7. At this time, the threshold 4 will be gradually lowered under the guidance of the hinge rod 10 until after the civil air defense door body 3 is completely closed, the bottom threshold 4 will also be completely attached to the ground, thereby maintaining the overall tightness of the civil air defense door body 3 and greatly improving the safety level of the civil air defense door body 3.

[0037] Referring to Figure 3 and Figure 5 , the ejector includes a support block 21 fixedly connected to one side of the sliding block 18. One end of the support block 21 is beveled. Two fixed plates 22 are symmetrically and fixedly connected inside the civil air defense door body 3. A transmission block 23 is slidably connected inside each of the two fixed plates 22. Both ends of the transmission block 23 are beveled. One bevel surface of the transmission block 23 is slidably connected to the bevel surface of the support block 21. A jacking block 24 is slidably connected to the other bevel surface of the transmission block 23. A baffle 25 is slidably arranged on the top of the civil air defense door body 3. The bottom of the baffle 25 is fixedly connected to the tops of the two jacking blocks 24. A card slot 26 matching the size of the baffle 25 is opened at the top of the wall 1. Dovetail blocks 27 are fixedly connected to the bevel surfaces of the support block 21 and the jacking block 24. Dovetail grooves 28 are opened on the two bevel surfaces at both ends of the transmission block 23. The dovetail blocks 27 are slidably connected in the dovetail grooves 28.

[0038] During use, when the sliding block 18 slides on the fixed column 17, it will drive the support block 21 on one side to move together. Since the dovetail block 27 on the inclined surface of the support block 21 is slidably connected to the dovetail groove 28 on the inclined surface of the transmission block 23, when the support block 21 moves, it will squeeze the transmission block 23 to slide inside the fixed plate 22. The inclined surface at the other end of the transmission block 23 is slidably connected to the inclined surface of the jacking block 24. Therefore, when the transmission block 23 slides, it will push the jacking block 24 to slide upward and eject. In this way, the sliding of the two jacking blocks 24 will drive the baffle 25 to be ejected upward, so that the baffle 25 is inserted into the inside of the card slot 26. Through the cooperation between the baffle 25 and the card slot 26, when the civil air defense door body 3 is subjected to an explosion shock, the connection stability between the civil air defense door body 3 and the wall 1 can be strengthened again, so that the civil air defense door body 3 can maintain more stability with the wall 1 during the explosion shock, thereby protecting the safety of the internal personnel and equipment, and preventing the civil air defense door body 3 from being deformed or falling off, so as to lose the protection function.

[0039] The implementation principle of the explosion-proof civil air defense door in this embodiment is as follows: During use, first push the civil air defense door body 3 to drive the thickening layer 31 to rotate around the rotating shaft 2 to open the civil air defense door body 3. When the civil air defense door body 3 drives the rotating shaft 2 to rotate, the bevel gear one 5 on the civil air defense door body 3 will rotate together with the rotating shaft 2. Since the bevel gear one 5 meshes with the bevel gear two 8, when the bevel gear one 5 rotates, it will drive the bevel gear two 8 to rotate together. In this way, the bevel gear two 8 drives the bidirectional lead screw 7 to rotate inside the fixed frame 6. As the bidirectional lead screw 7 rotates, the two lead screw sleeves 9 will gradually move away from each other on the bidirectional lead screw 7. The two hinge rods 10 at the bottom are driven to rotate around the positioning shaft 11 through the two moving-away lead screw sleeves 9. Therefore, one end of the two hinge rods 10 will drive the bottom sill 4 to gradually rise, so as to drive the bottom sill 4 to gradually retract into the inside of the civil air defense door body 3. By retracting the sill 4, when the civil air defense door body 3 is in the open state, it can not affect the normal passage of vehicles and pedestrians. When an emergency occurs and it is necessary to close the civil air defense door body 3 for protection, the civil air defense door body 3 can be pushed to close normally. During the closing process, the rotation of the rotating shaft 2 will drive the bevel gear one 5 to rotate in the reverse direction again, so that the two lead screw sleeves 9 gradually approach each other on the bidirectional lead screw 7. At this time, the sill 4 will be gradually lowered through the guidance of the hinge rod 10 until after the civil air defense door body 3 is completely closed, the bottom sill 4 will also be completely attached to the ground, so as to maintain the overall tightness of the civil air defense door body 3 and greatly improve the safety level of the civil air defense door body 3; Secondly, when an explosion occurs, one side of the civil air defense door body 3 will be subjected to a strong impact and deformed. Therefore, the force received by one side of the civil air defense door body 3 will be transmitted to the internal buffer plate 12. After the buffer plate 12 is subjected to the impact extrusion force, it will push the two rotating plates 19 to rotate. As the rotating plates 19 rotate, one end of the rotating plate 19 will push the sliding block 18 to slide on the fixed column 17, so as to squeeze the second buffer spring 20 to contract. And when the buffer plate 12 is displaced due to the impact, since both the upper and lower sides of the buffer plate 12 are fixedly connected to the connecting block 15, it will drive the connecting block 15 to displace together, so that the connecting block 15 squeezes the damper 14 and the first buffer spring 16 to contract. Through the multiple cooperation of the damper 14, the first buffer spring 16 and the second buffer spring 20, the explosion impact force received by the civil air defense door body 3 can be effectively buffered and protected, greatly improving the explosion-proof effect of the civil air defense door body 3, reducing the damage to the civil air defense door body 3, effectively absorbing and dispersing energy, making the door body not easily deformed or damaged, so as to avoid the failure of the protection function; In addition, when the sliding block 18 slides on the fixed column 17, it will drive the supporting block 21 on one side to move together. Since the dovetail block 27 on the inclined surface of the supporting block 21 is slidably connected to the dovetail groove 28 on the inclined surface of the transmission block 23, when the supporting block 21 moves, it will squeeze the transmission block 23 to slide inside the fixing plate 22. And the inclined surface at the other end of the transmission block 23 is slidably connected to the inclined surface of the jacking block 24. Therefore, when the transmission block 23 slides, it will push the jacking block 24 to slide upward and jack out. Thus, the sliding of the two jacking blocks 24 will drive the baffle 25 to jack out upward, so that the baffle 25 is jacked into the inside of the clamping groove 26. Through the cooperation between the baffle 25 and the clamping groove 26, when the civil air defense door body 3 is subjected to an explosion impact, the connection stability between the civil air defense door body 3 and the wall 1 can be strengthened again, so that the civil air defense door body 3 can maintain more stability with the wall 1 during the explosion impact, thereby protecting the safety of the internal personnel and equipment, so as to avoid the deformation or detachment of the civil air defense door body 3, thus losing the protection function.

Claims

1. An explosion-proof civil air defense door, comprising a wall (1), characterized in that: A rotating shaft (2) is rotatably connected inside the wall (1). An air defense door body (3) is rotatably connected to the rotating shaft (2). A thickened layer (31) is fixedly connected to one side of the air defense door body (3). A threshold (4) is slidably arranged at the bottom of the rotating shaft (2). An adjusting mechanism is installed inside the air defense door body (3). A fixing frame (6) is fixedly connected inside the air defense door body (3). A buffer plate (12) is installed inside the air defense door body (3). A buffering mechanism is installed inside the air defense door body (3). An ejecting member is installed inside the air defense door body (3).

2. The explosion-proof civil air defense door according to claim 1, wherein: The adjusting mechanism includes a first bevel gear (5) fixedly connected to the rotating shaft (2). A bidirectional lead screw (7) is rotatably connected inside the fixing frame (6). A second bevel gear (8) is fixedly connected to one end of the bidirectional lead screw (7). The second bevel gear (8) is meshed and connected with the first bevel gear (5). Two lead screw sleeves (9) are symmetrically threadedly connected to the bidirectional lead screw (7). Hinged rods (10) are rotatably connected to the bottoms of the two lead screw sleeves (9). The ends of the hinged rods (10) far away from the lead screw sleeves (9) are rotatably connected to the top of the threshold (4).

3. The explosion-proof civil air defense door according to claim 2, characterized in that: Two positioning shafts (11) are symmetrically and fixedly connected inside the air defense door body (3). The two hinged rods (10) are respectively rotatably connected to the two positioning shafts (11).

4. The explosion-proof civil air defense door according to claim 1, characterized in that: The buffering mechanism includes a plurality of fixing blocks (13) symmetrically and fixedly connected to one side inside the air defense door body (3). Dampers (14) are fixedly connected to one side of the plurality of fixing blocks (13). The ends of the dampers (14) far away from the fixing blocks (13) are fixedly connected to a connecting block (15). One end of the connecting block (15) is fixedly connected to one end of the buffer plate (12). A first buffer spring (16) is sleeved on the damper (14). One end of the first buffer spring (16) is fixedly connected to the fixing block (13). The other end of the first buffer spring (16) is fixedly connected to the connecting block (15).

5. The explosion-proof civil air defense door according to claim 4, characterized in that: Fixed columns (17) are fixedly connected to the opposite surfaces of the two fixing blocks (13). Two sliding blocks (18) are symmetrically and slidably connected to the fixed columns (17). Rotating plates (19) are rotatably connected to one side of the two sliding blocks (18). The ends of the two rotating plates (19) far away from the sliding blocks (18) are rotatably connected to one side of the buffer plate (12).

6. The explosion-proof civil air defense door according to claim 5, characterized in that: Two second buffer springs (20) are symmetrically and fixedly connected to the fixed columns (17). One end of the second buffer spring (20) is fixedly connected to the fixing block (13). The other end of the second buffer spring (20) is fixedly connected to the sliding block (18).

7. The explosion-proof civil air defense door according to claim 1, characterized in that: The ejector includes a support block (21) fixedly connected to one side of the sliding block (18). One end of the support block (21) is beveled. Two fixed plates (22) are symmetrically and fixedly connected inside the civil air defense door body (3). A transmission block (23) is slidably connected inside each of the two fixed plates (22). Both ends of the transmission block (23) are beveled. One bevel of the transmission block (23) is slidably connected to the bevel of the support block (21). A jacking block (24) is slidably connected to the other bevel of the transmission block (23). A baffle (25) is slidably arranged on the top of the civil air defense door body (3). The bottom of the baffle (25) is fixedly connected to the tops of the two jacking blocks (24). A clamping groove (26) matching the size of the baffle (25) is formed in the top of the wall (1).

8. The explosion-proof civil air defense door according to claim 7, characterized in that: Dovetail blocks (27) are fixedly connected to the beveled surfaces of the support block (21) and the jacking block (24). Dovetail grooves (28) are formed in the beveled surfaces at both ends of the transmission block (23). The dovetail blocks (27) are slidably connected in the dovetail grooves (28).

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