Civil air defense door with safety mechanism

Abstract

This application discloses a civil defense door with a security mechanism, relating to the field of civil defense door technology. The application includes a door frame, with a T-shaped mounting cover fixedly connected to the top of the door frame. A lifting slide groove is formed on the inner side of the door frame, and a door panel is slidably connected inside the lifting slide groove. The top of the door panel extends into the interior of the T-shaped mounting cover. When the door panel moves downward along the length of the lifting slide groove and a person is detected passing through the interior of the door frame, a sensing component can quickly activate an adjusting electric actuator to drive two adjusting rods around their hinged ends to push two adjusting sliders away from each other along the length of the adjusting slide groove. This, in conjunction with a transmission component, pushes two adjusting rollers away from each other along the length of a guide slide groove. Simultaneously, the middle section of the traction chain unfolds along the length of the guide slide groove, causing the bottom end of the traction chain to pull the door panel upward along the length of the lifting slide groove.

Description

Technical Field

[0001] This application relates to the field of civil defense door technology, and in particular to a civil defense door with a security mechanism. Background Technology

[0002] Civil defense doors, as crucial entrance and exit facilities in civil protection projects, play a vital protective role in various emergencies, such as war and natural disasters like earthquakes. With rapid urbanization, the application of civil defense doors is becoming increasingly widespread, especially in public places like underground shopping malls and subway stations, where they have become indispensable protective facilities. In these locations, civil defense doors not only need to remain threshold-free at ground level under normal circumstances to facilitate the passage of large numbers of people, but also need to respond quickly in emergencies, lowering the threshold to meet protection and airtightness requirements and ensure the safety of personnel.

[0003] Currently, lift-type air-raid shelter doors are widely used in public places such as shopping malls due to their unique design and ease of conversion between peacetime and wartime use. These doors maintain a level ground surface during peacetime, without thresholds or obstructions, greatly facilitating the passage of people and vehicles.

[0004] While lift-type air-raid shelter doors offer certain advantages in design and application, their safety issues cannot be ignored in actual use. Especially in public places such as shopping malls, where there is high traffic and dense crowds, a rapid descent of the door in an emergency could easily cause crushing and injury to those present, reducing the device's safety. Summary of the Invention

[0005] The purpose of this application is to address the problem that rapid descent of lift-type air-raid shelter doors in emergency situations can easily cause crushing and injury to personnel on site, reducing the safety of the device. This application provides an air-raid shelter door with a safety mechanism.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution: A security door with a safety mechanism includes a door frame. A T-shaped mounting cover is fixedly connected to the top of the door frame. A lifting groove is formed on the inner side of the door frame. A door panel is slidably connected inside the lifting groove. The top of the door panel extends into the interior of the T-shaped mounting cover. A unwinding roller is rotatably connected inside the T-shaped mounting cover. A traction chain is symmetrically fixedly connected to one end of the unwinding roller. A pair of guide grooves are symmetrically formed at one end of the T-shaped mounting cover. Guide sliders are slidably connected inside the guide grooves. An adjusting roller is rotatably connected between two opposing guide sliders. One end of the traction chain passes around a [missing information - likely a specific location or feature] along an S-shaped trajectory. The bottom of one adjusting roller is fixedly connected to the top of another adjusting roller and to the top of the door panel. One end of the T-shaped mounting cover is symmetrically provided with adjusting grooves. An adjusting slider is slidably connected inside the adjusting groove. An adjusting electric push rod is fixedly connected to one side of the door frame. An adjusting rod is symmetrically hinged to the output end of the adjusting electric push rod. One end of the adjusting rod is hinged to the adjusting slider. A transmission component for driving the guide slider to move along the length direction of the guide groove is installed at one end of the adjusting slider. A drive component for driving the unwinding roller to rotate is installed inside the T-shaped mounting cover. A sensing component is installed at one end of the door panel.

[0007] By adopting the above technical solution, and through the coordinated use of the sensing component, drive component, and transmission component, when the door panel moves downward along the length of the lifting slide and a person is detected passing through the door frame, the sensing component can quickly activate the adjusting electric push rod to drive two adjusting rods around the hinged end of the adjusting electric push rod to move two adjusting sliders away from each other along the length of the adjusting slide. Simultaneously, the transmission component drives two adjusting rollers to move away from each other along the length of the guide slide, and the middle section of the traction chain unfolds along the length of the guide slide. This causes the bottom end of the traction chain to pull the door panel upward along the length of the lifting slide. This ensures that when the infrared scanner detects that a person is still passing through the door frame, the door panel is promptly pulled upward along the length of the lifting slide, reducing the possibility of the door panel squeezing the person along the length of the lifting slide and effectively improving the safety of the device.

[0008] Furthermore, the transmission assembly includes an adjusting rack one fixedly connected to one end of the guide slider, an adjusting gear meshing with the adjusting rack one is rotatably connected to one end of the adjusting slider, and an adjusting rack two meshing with the adjusting gear is symmetrically fixedly connected to one side of the T-shaped mounting cover.

[0009] By adopting the above technical solution, and by setting the adjustment rack one to work in conjunction with the adjustment gear and adjustment rack two, when the driving adjustment rod pushes the adjustment slider to move the adjustment gear along the length direction of the adjustment groove, the adjustment gear meshes with the adjustment rack two and adjustment rack one, pushing the adjustment rack one to guide the slider and drive the adjustment roller to move quickly along the length direction of the guide groove. This effectively improves the efficiency of the adjustment roller in storing the middle section of the traction chain and further enhances the safety of the device.

[0010] Furthermore, the drive assembly includes a worm gear rotatably connected inside the T-shaped mounting cover, a drive motor fixedly connected inside the T-shaped mounting cover, the output end of the drive motor fixedly connected to the worm gear, and a worm wheel meshing with the worm gear fixedly connected to one end of the unwinding roller.

[0011] By adopting the above technical solution and setting the worm and worm wheel to work together, the starting drive motor can drive the worm and worm wheel to mesh, and the worm wheel can drive the unwinding roller to rotate, thereby facilitating the rotation of the unwinding roller and effectively improving the practicality of the device.

[0012] Furthermore, the sensing component includes an infrared scanner fixedly connected to the bottom of the door panel, and a controller fixedly connected to one end of the door frame. The controller is electrically connected to the infrared scanner, the drive motor, and the adjusting electric push rod.

[0013] By adopting the above technical solution and using the infrared scanner and controller in conjunction, it is convenient to use the infrared scanner to monitor and identify people passing through the door frame in real time, and use the controller to quickly control the drive motor and the adjusting electric push rod when people pass through the door frame, which effectively improves the safety of the device.

[0014] Furthermore, one end of the adjusting roller is symmetrically and fixedly connected with an I-beam limiting ring, and one end of the traction chain passes through the inside of the I-beam limiting ring.

[0015] By adopting the above technical solution, and by setting the I-beam limiting ring in conjunction with the traction chain, it is easy to limit the end of the traction chain that passes around the adjusting roller through the I-beam limiting ring. This effectively reduces the possibility of the end of the traction chain deviating along the length direction of the adjusting roller, improves the accuracy of the device, and further enhances the safety of the device.

[0016] Furthermore, U-shaped rubber anti-collision pads are symmetrically fixedly connected to the bottom of the door panel.

[0017] By adopting the above technical solution, and by using U-shaped rubber anti-collision pads in conjunction with the door panel, the door panel can form flexible contact with the human body through the U-shaped rubber anti-collision pads, thereby effectively reducing the degree of injury when the human body collides with the door panel and effectively improving the safety of the device.

[0018] Furthermore, a compression chamber is provided inside the door frame, and an elastic air storage bladder is fixedly connected inside the compression chamber. An elastic sealing air bladder is fixedly connected inside the lifting slide. One end of the elastic air storage bladder is symmetrically fixedly connected to an air guide pipe. One end of the air guide pipe passes through the door frame and communicates with the elastic sealing air bladder. A sealing component for compressing the elastic air storage bladder is installed inside the compression chamber.

[0019] By adopting the above technical solution, and by setting up the sealing component in conjunction with the elastic air reservoir, air guide pipe, and elastic sealing airbag, when the door panel pushes the sealing component to squeeze the elastic air reservoir when the door frame is sealed inside the sliding groove, the gas inside the elastic air reservoir passes through the air guide pipe into the interior of the elastic sealing airbag. This causes the elastic sealing airbag to expand and fill the gap between the door panel and the sliding groove, thereby effectively improving the sealing effect between the door panel and the sliding groove.

[0020] Furthermore, the sealing assembly includes a compression slide plate slidably connected inside the compression chamber, and an abutment slide rod is symmetrically fixedly connected to the top of the compression slide plate. One end of the abutment slide rod passes through the door frame and forms a slidable connection with the door frame.

[0021] By adopting the above technical solution, and by setting the cooperation between the contact slide bar and the compression slide plate, it is convenient to use the door panel to squeeze the contact slide bar along the length of the lifting slide groove to push the compression slide plate to squeeze the elastic air storage bag, thereby causing the elastic air storage bag to contract and deform. This facilitates the driving of the compression slide plate to squeeze the elastic air storage bag, effectively improving the practicality of the device.

[0022] In summary, this application includes at least one of the following beneficial effects: 1. By using the sensing component in conjunction with the drive component and transmission component, when the door panel moves downward along the length of the lifting slide and a person is detected passing through the door frame, the sensing component can quickly activate the adjusting electric push rod to drive two adjusting rods around the hinged end of the adjusting electric push rod to move two adjusting sliders away from each other along the length of the adjusting slide. Simultaneously, the transmission component drives two adjusting rollers to move away from each other along the length of the guide slide, and the middle section of the traction chain unfolds along the length of the guide slide. This causes the bottom end of the traction chain to pull the door panel upward along the length of the lifting slide. This ensures that when the infrared scanner detects a person still passing through the door frame, the door panel is promptly pulled upward along the length of the lifting slide, reducing the risk of the door panel squeezing the person and effectively improving the safety of the device.

[0023] 2. By setting up the adjustment rack one in cooperation with the adjustment gear and adjustment rack two, when the drive adjustment rod pushes the adjustment slider to move the adjustment gear along the length direction of the adjustment groove, the adjustment gear meshes with the adjustment rack two and adjustment rack one, pushing the adjustment rack one to guide the slider and drive the adjustment roller to move quickly along the length direction of the guide groove. This effectively improves the efficiency of the adjustment roller in storing the middle section of the traction chain and further improves the safety of the device.

[0024] 3. By setting up a sealing component in conjunction with the elastic air reservoir, air guide pipe, and elastic sealing airbag, when the door panel pushes the sealing component to compress the elastic air reservoir when the door frame is sealed inside the drive-embedded lifting slide, the gas inside the elastic air reservoir passes through the air guide pipe into the interior of the elastic sealing airbag. This causes the elastic sealing airbag to expand and fill the gap between the door panel and the lifting slide, thereby effectively improving the sealing effect between the door panel and the lifting slide. Attached Figure Description

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

[0026] Figure 2 This is a schematic diagram of the internal structure of the door frame and the T-shaped mounting cover in this application.

[0027] Figure 3 This is a three-dimensional structural diagram of the sensing component in this application.

[0028] Figure 4 This is an exploded view of the interior of the lifting chute and the compression chamber in this application.

[0029] Explanation of reference numerals in the attached figures: 1. Door frame; 2. T-shaped mounting cover; 3. Lifting slide rail; 4. Door panel; 5. Unwinding roller; 6. Traction chain; 7. Guide slide rail; 8. Guide slider; 9. Adjusting roller; 10. Adjusting slide rail; 11. Adjusting slider; 12. Adjusting rod; 13. Adjusting electric push rod; 14. Adjusting rack one; 15. Adjusting gear; 16. Adjusting rack two; 17. Worm gear; 18. Drive motor; 19. Worm wheel; 20. Infrared scanner; 21. Controller; 22. I-beam limit ring; 23. U-shaped rubber anti-collision pad; 24. Squeezing chamber; 25. Elastic air reservoir; 26. Elastic sealing airbag; 27. Air guide pipe; 28. Squeezing slide plate; 29. ​​Abutment slide bar. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0031] This application discloses a civil defense door with a security mechanism.

[0032] Reference Figures 1-3 A type of air-raid shelter door with a security mechanism includes a door frame 1. A T-shaped mounting cover 2 is fixedly connected to the top of the door frame 1. A lifting slide 3 is provided on the inner side of the door frame 1. A door panel 4 is slidably connected inside the lifting slide 3. The top of the door panel 4 extends into the interior of the T-shaped mounting cover 2. A unwinding roller 5 is rotatably connected inside the T-shaped mounting cover 2. A traction chain 6 is symmetrically fixedly connected to one end of the unwinding roller 5. A pair of guide slides 7 are symmetrically provided at one end of the T-shaped mounting cover 2. Guide sliders 8 are slidably connected inside the guide slides 7. An adjusting roller 9 is rotatably connected between the two opposing guide sliders 8. One end of the traction chain 6 passes around an adjusting roller along an S-shaped trajectory. The bottom of 9 is fixedly connected to the top of another adjusting roller 9 and the top of the door panel 4. One end of the T-shaped mounting cover 2 is symmetrically provided with adjusting grooves 10. The adjusting slider 11 is slidably connected inside the adjusting groove 10. One side of the door frame 1 is fixedly connected with an adjusting electric push rod 13. The output end of the adjusting electric push rod 13 is symmetrically hinged with an adjusting rod 12. One end of the adjusting rod 12 is hinged to the adjusting slider 11. One end of the adjusting slider 11 is equipped with a transmission component for driving the guide slider 8 to move along the length direction of the guide groove 7. The inside of the T-shaped mounting cover 2 is equipped with a drive component for driving the unwinding roller 5 to rotate. One end of the door panel 4 is equipped with a sensing component. The transmission assembly includes an adjusting rack 14 fixedly connected to one end of the guide slider 8, an adjusting gear 15 rotatably connected to one end of the adjusting slider 11 and meshing with the adjusting rack 14, and an adjusting rack 16 symmetrically fixedly connected to one side of the T-shaped mounting cover 2 and meshing with the adjusting gear 15. Furthermore, the drive assembly includes a worm gear 17 rotatably connected inside the T-shaped mounting cover 2, a drive motor 18 fixedly connected inside the T-shaped mounting cover 2, the output end of the drive motor 18 fixedly connected to the worm gear 17, and a worm wheel 19 meshing with the worm gear 17 fixedly connected to one end of the unwinding roller 5. Furthermore, the sensing components include an infrared scanner 20 fixedly connected to the bottom of the door panel 4, and a controller 21 fixedly connected to one end of the door frame 1. The controller 21 is electrically connected to the infrared scanner 20, the drive motor 18, and the adjusting electric push rod 13. Furthermore, one end of the adjusting roller 9 is symmetrically and fixedly connected to an I-beam limiting ring 22, and one end of the traction chain 6 passes through the inside of the I-beam limiting ring 22; Furthermore, U-shaped rubber anti-collision pads 23 are symmetrically fixedly connected to the bottom of the door panel 4.

[0033] In use, the infrared scanner 20 is first used to monitor and scan the interior of the door frame 1 in real time. Then, the drive motor 18 is started to drive the worm gear 17 to rotate, and the worm gear 17 meshes with the worm wheel 19, thereby driving the worm wheel 19 to drive the unwinding roller 5 to rotate. This allows the unwinding roller 5 to unwind the traction chain 6. At the same time, under the action of gravity, the door panel 4 pulls one end of the traction chain 6 around the bottom of one adjusting roller 9 and the top of another adjusting roller 9, and moves downward along the length of the lifting slide 3. This allows the door panel 4 to complete the closing operation of the door frame 1 along the length of the lifting slide 3. At the same time, when one end of the traction chain 6 passes around one end of the adjusting roller 9, it is embedded inside the I-beam limit ring 22. Furthermore, while the door panel 4 is closing the door frame 1 along the length of the lifting slide 3, when the infrared scanner 20 detects that someone is still passing through the inside of the door frame 1, the infrared scanner 20 sends a danger signal to the controller 21, and the controller 21 immediately controls the drive motor 18 to shut down, thereby stopping the unwinding roller 5 from unwinding the traction chain 6, so as to prevent the door panel 4 from continuing to descend along the length of the lifting slide 3 and causing injury to personnel. At the same time, by setting the U-shaped rubber anti-collision pad 23 to form a protective wrap around the bottom of the door panel 4, the door panel 4 forms a flexible contact with the human body through the U-shaped rubber anti-collision pad 23, so as to reduce the injury caused by the collision between the door panel 4 and the human body. Simultaneously, the controller 21 quickly activates the adjusting electric push rod 13, pushing one end of the adjusting rod 12 upwards along the length of the lifting slide 3. This causes the two adjusting rods 12 to deflect away from each other around their hinged ends with the adjusting electric push rod 13. Simultaneously, one end of the adjusting rod 12 pushes the adjusting slider 11 to move along the length of the adjusting slide 10. The adjusting slider 11 then drives the adjusting gear 15 to engage synchronously with the adjusting rack 16 and the adjusting rack 14. This causes the two adjusting gears 15 to drive the two adjusting racks 14 to move the guide slider 8 away from each other along the length of the guide slide 7, thus causing the two guides... The guide slider 8 drives two adjusting rollers 9 to move away from each other along the length of the guide groove 7, and one end of each adjusting roller 9 rolls against the traction chain 6, pushing the middle section of the traction chain 6 to unfold along the length of the guide groove 7. At the same time, the bottom end of the traction chain 6 pulls the door panel 4 to move upward along the length of the lifting groove 3. This ensures that when the infrared scanner 20 detects that there are still people passing through inside the door frame 1, the door panel 4 is promptly pulled upward along the length of the lifting groove 3, thereby reducing the possibility of the door panel 4 squeezing people along the length of the lifting groove 3 and effectively improving the safety of the device.

[0034] Reference Figure 1 and Figure 2 , Figure 4The door frame 1 has a compression chamber 24 inside, and an elastic air storage bag 25 is fixedly connected inside the compression chamber 24. An elastic sealing air bag 26 is fixedly connected inside the lifting slide 3. One end of the elastic air storage bag 25 is symmetrically fixedly connected to an air guide pipe 27. One end of the air guide pipe 27 passes through the door frame 1 and communicates with the elastic sealing air bag 26. A sealing component for compressing the elastic air storage bag 25 is installed inside the compression chamber 24. The sealing assembly includes a compression slide plate 28 that is slidably connected inside the compression chamber 24. Abutment slide rod 29 is symmetrically fixedly connected to the top of the compression slide plate 28. One end of the abutment slide rod 29 passes through the door frame 1 and forms a slidable connection with the door frame 1.

[0035] In use, when the drive assembly is activated to drive the unwinding roller 5 to unwind the traction chain 6, causing one end of the door panel 4 to move downwards along the length of the lifting slide 3 and close the interior of the door frame 1, the door panel 4, in conjunction with gravity, presses against the contact slide rod 29 along the length of the lifting slide 3. One end of the contact slide rod 29 passes through the door frame 1 and pushes the compression slide plate 28 to compress the elastic air reservoir 25, causing it to contract. Simultaneously, the gas inside the elastic air reservoir 25 is compressed by the compression slide plate 28 and passes through the air guide pipe 27 into the interior of the elastic sealing airbag 26. This causes the elastic sealing airbag 26 to expand and deform inside the lifting slide 3, and one end of the elastic sealing airbag 26 to contact the door panel 4. This fills the gap between the door panel 4 and the lifting slide 3, effectively improving the sealing effect between the door panel 4 and the lifting slide 3.

[0036] The implementation principle of a security door with a safety mechanism in this embodiment is as follows: First, an infrared scanner 20 is set up to monitor and scan the internal area of ​​the door frame 1 in real time. Then, the drive motor 18 is started to drive the worm gear 17 to rotate, and the worm gear 17 meshes with the worm wheel 19, thereby driving the worm wheel 19 to drive the unwinding roller 5 to rotate. This allows the unwinding roller 5 to unwind the traction chain 6. At the same time, under the action of gravity, the door panel 4 pulls one end of the traction chain 6 around the bottom of one adjusting roller 9 and the top of another adjusting roller 9, and moves downward along the length direction of the lifting slide 3, thereby realizing the door panel 4 to complete the closing operation of the door frame 1 along the length direction of the lifting slide 3. Simultaneously, when one end of the door panel 4 moves downward along the length of the lifting slide 3 and closes the interior of the door frame 1, the door panel 4, in conjunction with gravity, presses against the contact slide rod 29 along the length of the lifting slide 3. This causes one end of the contact slide rod 29 to pass through the door frame 1 and push the compression slide plate 28 to compress the elastic air storage bag 25, causing it to contract and deform. At the same time, the gas inside the elastic air storage bag 25 is compressed by the compression slide plate 28 and passes through the air guide pipe 27 into the interior of the elastic sealing air bag 26. This causes the elastic sealing air bag 26 to expand and deform inside the lifting slide 3, and causes one end of the elastic sealing air bag 26 to contact the door panel 4, thus filling the gap between the door panel 4 and the lifting slide 3. Then, when the infrared scanner 20 detects that someone is still passing through the inside of the door frame 1, it sends a danger signal to the controller 21, causing the controller 21 to immediately shut down the drive motor 18, thereby stopping the unwinding roller 5 from unwinding the traction chain 6 to prevent the door panel 4 from continuing to descend along the length of the lifting slide 3 and causing injury to personnel. At the same time, the controller 21 quickly activates the adjusting electric push rod 13 to push one end of the adjusting rod 12 upward along the length of the lifting slide 3, causing the two adjusting rods 12 to deflect away from each other around the hinge end with the adjusting electric push rod 13. Simultaneously, one end of the adjusting rod 12 pushes the adjusting slider 11 to move along the length of the adjusting slide 10, causing the adjusting slider 11 to drive the adjusting gear 15 and the adjusting rack 16, and the adjusting rack 1... 14 forms synchronous meshing, thereby causing the two adjusting gears 15 to drive the two adjusting racks 14 to move the guide sliders 8 away from each other along the length of the guide groove 7. This causes the two guide sliders 8 to drive the two adjusting rollers 9 to move away from each other along the length of the guide groove 7. One end of each of the two adjusting rollers 9 rolls against the traction chain 6, pushing the middle section of the traction chain 6 to unfold along the length of the guide groove 7. At the same time, the bottom end of the traction chain 6 pulls the door panel 4 upward along the length of the lifting groove 3. This ensures that when the infrared scanner 20 detects that there are still people passing through inside the door frame 1, the door panel 4 is promptly pulled upward along the length of the lifting groove 3, thereby reducing the possibility of the door panel 4 squeezing people along the length of the lifting groove 3.

Claims

1. A civil defense door with a security mechanism, comprising a door frame (1), characterized in that: A T-shaped mounting cover (2) is fixedly connected to the top of the door frame (1). A lifting slide groove (3) is provided on the inner side of the door frame (1). A door panel (4) is slidably connected inside the lifting slide groove (3). The top of the door panel (4) extends into the interior of the T-shaped mounting cover (2). A unwinding roller (5) is rotatably connected inside the T-shaped mounting cover (2). A traction chain (6) is symmetrically fixedly connected to one end of the unwinding roller (5). A pair of guide slide grooves (7) are symmetrically provided at one end of the T-shaped mounting cover (2). A guide slider (8) is slidably connected inside the guide slide groove (7). An adjusting roller (9) is rotatably connected between the two opposing guide sliders (8). One end of the traction chain (6) passes around the bottom of one adjusting roller (9) along an S-shaped trajectory and connects with the other... The top of the adjusting roller (9) is fixedly connected to the top of the door panel (4). One end of the T-shaped mounting cover (2) is symmetrically provided with adjusting grooves (10). The adjusting grooves (10) are slidably connected to the adjusting slider (11). One side of the door frame (1) is fixedly connected with an adjusting electric push rod (13). The output end of the adjusting electric push rod (13) is symmetrically hinged with an adjusting rod (12). One end of the adjusting rod (12) is hinged to the adjusting slider (11). One end of the adjusting slider (11) is equipped with a transmission component for driving the guide slider (8) to move along the length direction of the guide groove (7). The inside of the T-shaped mounting cover (2) is equipped with a drive component for driving the unwinding roller (5) to rotate. One end of the door panel (4) is equipped with a sensing component.

2. A civil defense door with a security mechanism according to claim 1, characterized in that: The transmission assembly includes an adjusting rack one (14) fixedly connected to one end of the guide slider (8), an adjusting gear (15) rotatably connected to one end of the adjusting slider (11) and meshing with the adjusting rack one (14), and an adjusting rack two (16) meshing with the adjusting gear (15) symmetrically fixedly connected to one side of the T-shaped mounting cover (2).

3. A civil defense door with a security mechanism according to claim 1, characterized in that: The drive assembly includes a worm gear (17) rotatably connected inside the T-shaped mounting cover (2), a drive motor (18) fixedly connected inside the T-shaped mounting cover (2), the output end of the drive motor (18) being fixedly connected to the worm gear (17), and a worm wheel (19) meshing with the worm gear (17) being fixedly connected to one end of the unwinding roller (5).

4. A civil defense door with a security mechanism according to claim 1, characterized in that: The sensing component includes an infrared scanner (20) fixedly connected to the bottom of the door panel (4), and a controller (21) fixedly connected to one end of the door frame (1). The controller (21) is electrically connected to the infrared scanner (20), the drive motor (18), and the adjusting electric push rod (13).

5. A civil defense door with a security mechanism according to claim 1, characterized in that: One end of the adjusting roller (9) is symmetrically fixedly connected to an I-beam limiting ring (22), and one end of the traction chain (6) passes through the inside of the I-beam limiting ring (22).

6. A civil defense door with a security mechanism according to claim 1, characterized in that: The bottom of the door panel (4) is symmetrically fixed with U-shaped rubber anti-collision pads (23).

7. A civil defense door with a security mechanism according to claim 1, characterized in that: The door frame (1) has a compression chamber (24) inside, and an elastic air storage bag (25) is fixedly connected inside the compression chamber (24). An elastic sealing air bag (26) is fixedly connected inside the lifting slide (3). One end of the elastic air storage bag (25) is symmetrically fixedly connected to an air guide pipe (27). One end of the air guide pipe (27) passes through the door frame (1) and communicates with the elastic sealing air bag (26). The compression chamber (24) is equipped with a sealing component for compressing the elastic air storage bag (25).

8. A civil defense door with a security mechanism according to claim 7, characterized in that: The sealing assembly includes a compression slide plate (28) slidably connected inside the compression chamber (24). Abutment slide rod (29) is symmetrically fixedly connected to the top of the compression slide plate (28). One end of the abutment slide rod (29) passes through the door frame (1) and forms a sliding connection with the door frame (1).

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