Civil air defense door

Abstract

The civil air defense door comprises a door frame, a door leaf, a lock and a lifting type sealing beam, the door leaf is hinged to the door frame through hinges, the lock is arranged at the hinged position and locks the two sides of the door leaf together with the opening end of the door leaf, the mechanism comprises a buckle base, a spring bolt and other components, and the buckle base is provided with an annular sealing groove and a silicon rubber sealing ring. The spring bolt is provided with a micro air hole and is filled with water-swelling water-stopping glue; the lifting type sealing beam is arranged at the bottom of the door leaf, the longitudinal beam and the cross beam move up and down through a handle, a connecting rod mechanism and the like to seal the bottom, and the lower portion of the cross beam is provided with a double-layer step-shaped installation groove and a sealing rubber strip with an inner layer and an outer layer. The effects that the two sides and the bottom of the civil air defense door are effectively sealed, and the protection performance of the civil air defense door is improved are achieved.

Description

Technical Field

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

[0002] Civil defense buildings are a general term for building projects with civil air defense works as necessary ancillary works. They are mostly underground parking garages, and are equipped with the hardware required for wartime shelters, such as civil defense doors, sealing doors, lighting, ventilation, water supply and drainage, communication, and network.

[0003] In existing civil defense buildings, a certain gap needs to be left at the connection between the bottom of the civil defense door and the ground during installation to ensure the normal operation of the civil defense door. However, leaving a gap greatly reduces the airtightness of the interior of the civil defense building for people to take refuge in.

[0004] For example, a building structure for civil defense buildings includes a door frame. Two civil defense doors are installed on the inner side of the door frame via an installation structure. A lifting mechanism is provided on one side of each civil defense door. The moving end of the lifting mechanism is connected to the upper surface of a moving base. A sealing element is fixedly installed on the inner side of the moving base by multiple bolts. The bottom end of the door frame is fixedly connected to the upper surface of the ground. Activating two telescopic cylinders causes the telescopic cylinders to extend and retract, moving the connected moving base downwards until the sealing element installed on the inner side of the moving base is in contact with the ground. Guide rods on both sides of the telescopic cylinders and springs fitted onto the outer surface of the guide rods can increase the stability of the sealing element's vertical movement to a certain extent. The rubber layer on the inner side of the two civil defense doors and the sealing element at the bottom effectively ensure the airtightness and safety of people taking refuge inside the civil defense building during wartime.

[0005] The aforementioned technical solution for sealing the lower sealing structure of the air-raid shelter door, which uses a telescopic cylinder to drive the sealing components, lacks rapid operability, has a complex structure, and has a high manufacturing cost.

[0006] Furthermore, the two sides of the aforementioned air-raid shelter door lack a sealing structure corresponding to the lower closure, resulting in poor sealing performance. Utility Model Content

[0007] To overcome the above-mentioned technical problems, this application provides a civil defense door.

[0008] The technical solution for a civil defense door provided in this application is as follows:

[0009] A type of air-raid shelter door includes: a door frame, a door leaf, a lock, and a lifting sealing beam. The door leaf is hinged to the door frame. The lock is located at the hinge between the door leaf and the door frame and at the open end of the door leaf. The lock locks both sides of the door leaf. The lifting sealing assembly is located at the bottom of the door leaf and is movably connected to the door leaf to seal the bottom of the door leaf.

[0010] By adopting the above technical solutions, the locking mechanism can lock both sides of the door leaf to ensure the stability of the door leaf when closed; the lifting sealing beam is movably connected to the door leaf to seal the bottom of the door leaf, thereby improving the airtightness and safety of the interior of the civil defense building.

[0011] Preferably, the locking mechanism includes a latching seat and a bolt that cooperate with each other. The latching seat is fixed to the edge of the door frame, and the bolt is installed on the other edge of the door leaf through an elastic reset member.

[0012] By adopting the above technical solution, the locking mechanism consisting of the latch seat and the locking tongue can lock both sides of the door leaf. The elastic reset component allows the locking tongue to automatically return to its initial position, facilitating the opening and closing of the air defense door and improving its ease of use and stability.

[0013] Preferably, a rotation limiting block is provided between the latch and the buckle seat, and the rotation limiting block is rotatably connected to the door leaf or the door frame via a torsion spring.

[0014] By adopting the above technical solution, a rotating limiting block is set between the latch and the latch seat through a torsion spring. The rotating limiting block can play a limiting role, ensuring the stability of the engagement between the latch seat and the latch, thereby improving the locking effect on both sides of the door leaf.

[0015] Preferably, the inner wall of the buckle seat is provided with an annular sealing groove, and a compressible silicone rubber sealing ring is embedded in the annular sealing groove. The surface of the silicone rubber sealing ring is hydrophobically treated. The side of the latch is provided with multiple micro air holes, and the micro air holes are filled with water-swellable waterproof adhesive.

[0016] By adopting the above technical solution, the side wall is provided with an annular sealing groove and a snap-fit ​​seat with a compressible silicone rubber sealing ring embedded in the groove with a hydrophobic surface, and the side is provided with a lock tongue with micro-pores filled with water-swellable sealing adhesive. The combination of these components allows the air-raid shelter door to be locked from both sides. The rotating limit block can restrict the rotation of the lock tongue. The compressible silicone rubber sealing ring can improve the sealing performance at the joint between the snap-fit ​​seat and the lock tongue. The hydrophobic surface makes it less susceptible to water immersion and damage. The water-swellable sealing adhesive expands when water enters, further enhancing the waterproof sealing effect.

[0017] Preferably, the surface of the rotating limiting block is provided with a wave-shaped anti-slip texture, and the part of the rotating limiting block that contacts the buckle seat and the locking tongue is coated with a wear-resistant and friction-reducing coating.

[0018] By adopting the above technical solutions, the wave-shaped anti-slip texture on the surface of the rotating limit block can increase the friction to better perform the limiting function. The wear-resistant and friction-reducing coating on the contact parts with the buckle seat and the lock tongue can reduce wear and reduce frictional resistance, ensuring the performance and life of the rotating limit block. The lifting sealing beam can seal the bottom of the door leaf.

[0019] Preferably, the lifting sealing beam includes a crossbeam disposed at the bottom of the door leaf, a longitudinal beam fixedly disposed above the crossbeam, an mounting sleeve sleeved on the outside of the longitudinal beam and fixedly connected to the door leaf, a handle rotatably disposed on the door leaf, and a linkage mechanism. The linkage mechanism includes a main linkage and a secondary linkage. One end of the main linkage is hinged to the pivot of the handle, and the other end is hinged to the secondary linkage. The secondary linkage includes a first secondary linkage hinged to the bottom of the longitudinal beam and a second secondary linkage hinged to the top of the mounting sleeve. The first secondary linkage and the second secondary linkage are symmetrical about their hinge points with the main linkage. A connecting arm is disposed on the pivot and is hinged to the main linkage through the connecting arm. The pivot drives the main linkage to move toward or away from the longitudinal beam, drives the included angle between the first secondary linkage and the second secondary linkage to change, drives the longitudinal beam to move up and down, and drives the crossbeam to move up and down, thereby achieving a seal between the door leaf and the ground.

[0020] By adopting the above technical solution, the components of the lifting sealing beam work together. The user can operate the handle to drive the main connecting rod through the rotating shaft and connecting arm, thereby changing the angle between the first and second auxiliary rods, and driving the longitudinal beam and the transverse beam to move up and down. This structure is simple and easy to operate, avoiding the problems of insufficient quick operation, complex structure and high manufacturing cost of the existing lower sealing structure. At the same time, it realizes the sealing between the door and the ground, and improves the airtightness of the interior of the civil defense building.

[0021] Preferably, there are two longitudinal beams, which are respectively located at both ends of the crossbeam, and two sets of linkage mechanisms are provided.

[0022] By adopting the above technical solution, setting two longitudinal beams at both ends of the transverse beam and equipping them with two sets of linkage mechanisms, the stability and reliability of the lifting sealing beam operation can be improved, and the sealing effect of the bottom of the air defense door can be better guaranteed.

[0023] Preferably, the lower part of the crossbeam is provided with a double-layer mounting groove, the mounting groove is stepped, and a sealing strip is provided in the mounting groove along the length direction of the mounting groove.

[0024] By adopting the above technical solution, a double-layer stepped installation groove is set at the bottom of the crossbeam, and a sealing strip is set in the groove along the length direction, which further enhances the sealing effect between the bottom of the air-raid shelter door and the ground.

[0025] Preferably, the sealing strip consists of an inner rigid substrate and an outer elastic filler layer.

[0026] By adopting the above technical solution, the sealing strip is divided into an inner rigid substrate and an outer elastic filling layer. It can combine the support of the rigid substrate and the elastic deformation capability of the elastic filling layer to better adapt to different ground conditions and enhance the sealing effect at the bottom of the air-raid shelter door.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By locking both sides of the door leaf through a locking mechanism, the shortcomings of existing technologies that only focus on bottom sealing and lack corresponding side sealing structures are overcome, thereby improving the overall sealing effect of the air defense door;

[0029] 2. The lifting sealing beam works in conjunction with the handle and linkage mechanism to drive the crossbeam to move up and down to achieve a seal between the door leaf and the ground. This avoids the problems of complex structure and high cost of existing telescopic cylinders driving sealing components, simplifies the structure and reduces manufacturing costs.

[0030] 3. The lifting sealing beam is operated by a handle-driven linkage mechanism, which improves the speed of operation compared to the telescopic cylinder method. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a civil defense door structure according to this application.

[0032] Figure 2 This is a schematic diagram of the locking structure.

[0033] Figure 3 This is a schematic diagram of a lifting-type sealing beam structure.

[0034] Explanation of reference numerals in the attached drawings: 1. Door frame; 2. Door leaf; 3. Lock; 31. Buckle seat; 311. Annular sealing groove; 32. Lock tongue; 321. Elastic reset element; 33. Rotary limit block; 4. Lifting sealing beam; 41. Crossbeam; 411. Mounting groove; 412. Sealing strip; 42. Longitudinal beam; 43. Mounting sleeve; 44. Handle; 441. Rotating shaft; 442. Connecting arm; 45. Linkage mechanism; 451. Main connecting rod; 452. Secondary connecting rod; 4521. First secondary rod; 4522. Secondary rod. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0036] This application discloses a type of air-raid shelter door. (Refer to...) Figure 1The air-raid shelter door includes a door frame 1, a door leaf 2, a locking mechanism 3, and a lifting sealing beam 4. The door leaf 2 is hinged to the door frame 1, allowing it to rotate around the hinges and open and close. The locking mechanism 3 is located at the hinge between the door leaf 2 and the door frame 1, as well as at the open end of the door leaf 2. It locks both sides of the door leaf 2 to prevent it from opening arbitrarily, thus enhancing its stability and security when closed. The lifting sealing beam 4 is located at the bottom of the door leaf 2 and is movably connected to it. It seals the bottom of the door leaf 2, preventing outside air and water from entering the air-raid shelter and improving its airtightness.

[0037] Reference Figure 2 Specifically, the locking mechanism 3 includes a latch seat 31 and a latch 32 that cooperate with each other. The latch seat 31 is generally made of metal, possessing a certain strength and durability. It is installed on the edge of the door frame 1 by welding or bolting. The latch 32 can also be made of metal and is installed on the other edge of the door leaf 2 via an elastic reset element 321. The elastic reset element 321 can be a spring. When the fire door is closed, the latch 32 engages with the latch seat 31 under the action of the spring, realizing the door lock function. In practical applications, the latch seat 31 can also be replaced by a slot, as long as it can cooperate with the latch 32 to achieve the locking function. A rotation limit block 33 is provided between the latch 32 and the latch seat 31. The rotation limit block 33 is rotatably connected to the door leaf 2 or the door frame 1 via a torsion spring. The rotation limit block 33 is generally made of plastic, with a smooth surface and a certain degree of toughness. The torsion spring keeps the rotating limit block 33 in a specific position when no external force is applied. When the latch 32 engages with the buckle seat 31, the rotating limit block 33 acts as a limit to prevent the latch 32 from moving or wobbling excessively. The rotating limit block 33 can also be replaced by a rubber stop, which can also provide a certain degree of limiting and buffering effect.

[0038] The inner wall of the latch seat 31 is provided with an annular sealing groove 311, which surrounds the inner side of the latch seat 31 in a ring shape. Its function is to install a sealing ring. A compressible silicone rubber sealing ring is embedded in the annular sealing groove 311. Silicone rubber has good elasticity and weather resistance, and can adapt well to various environments. The surface of the silicone rubber sealing ring is hydrophobically treated, so it will not get wet even when exposed to water, thus better performing its sealing function. In some special environments, fluororubber sealing rings can also be used instead of silicone rubber sealing rings. Fluororubber has better high temperature resistance and corrosion resistance. Multiple micro-pores are opened on the side of the latch 32. The micro-pores are small in diameter and evenly distributed on the side of the latch 32. The micro-pores are filled with water-swellable sealing adhesive. When exposed to water, the sealing adhesive will expand, further enhancing the sealing effect. The water-swellable sealing adhesive can also be replaced with water-absorbing resin, which also has the property of absorbing water and swelling.

[0039] The surface of the rotating limit block 33 is provided with a wavy anti-slip texture. The wavy anti-slip texture increases the friction between the rotating limit block 33 and other components, preventing the rotating limit block 33 from sliding. The parts of the rotating limit block 33 that contact the buckle seat 31 and the locking tongue 32 are coated with a wear-resistant and friction-reducing coating. This wear-resistant and friction-reducing coating can reduce the coefficient of friction between the rotating limit block 33 and other components, reduce wear, and extend service life. This wear-resistant and friction-reducing coating can be a polytetrafluoroethylene coating or a ceramic coating. The locking 3 achieves a basic locking function through the cooperation of the buckle seat 31 and the locking tongue 32. The rotating limit block 33 plays an auxiliary limiting role. The annular sealing groove 311, the silicone rubber sealing ring, as well as the micro-pores and water-swellable sealing adhesive enhance the sealing performance, while the wavy anti-slip texture and the wear-resistant and friction-reducing coating improve the stability and durability of the components.

[0040] Reference Figure 3 Specifically, the lifting sealing beam 4 includes a horizontal beam 41 located at the bottom of the door leaf 2, a vertical beam 42 fixedly mounted above the horizontal beam 41, a mounting sleeve 43 fitted over the outside of the vertical beam 42 and fixedly connected to the door leaf 2, a handle 44 rotatably mounted on the door leaf 2, and a linkage mechanism 45. The horizontal beam 41 is generally made of steel and has a strong load-bearing capacity. Located at the bottom of the door leaf 2, it is a key component for achieving a seal with the ground. The vertical beam 42 is also made of steel and is vertically fixed above the horizontal beam 41, serving as support and connection. The mounting sleeve 43 is usually made of aluminum alloy, which is lightweight yet strong. It fits over the outside of the vertical beam 42 and is fixedly connected to the door leaf 2, providing a stable connection structure between the door leaf 2 and the vertical beam 42. The handle 44 is generally made of plastic for easy operation; rotating the handle 44 drives the linkage mechanism 45.

[0041] The linkage mechanism 45 includes a main link 451 and a secondary link 452. One end of the main link 451 is hinged to the pivot 441 of the handle 44, and the other end is hinged to the secondary link 452. The main link 451 is typically a metal rod with good rigidity. The secondary link 452 includes a first secondary link 4521 hinged to the bottom of the longitudinal beam 42, and a second secondary link 4522 hinged to the top of the mounting sleeve 43. The first secondary link 4521 and the second secondary link 4522 are symmetrical about their hinge points with the main link 451. This symmetrical structure makes the linkage mechanism 45 more stable and coordinated during movement. A connecting arm 442 is provided on the rotating shaft 441 and is hinged to the main connecting rod 451 through the connecting arm 442. When the handle 44 is rotated, the rotating shaft 441 rotates, and the main connecting rod 451 moves toward or away from the longitudinal beam 42 through the connecting arm 442. This drives the angle between the first auxiliary rod 4521 and the second auxiliary rod 4522 to change, and finally drives the longitudinal beam 42 to move up and down, and drives the crossbeam 41 to move up and down.

[0042] Two longitudinal beams 42 are provided, one at each end of the crossbeam 41, and two sets of linkage mechanisms 45 are provided. This arrangement makes the crossbeam 41 more stable and the force more even during vertical movement. A double-layered mounting groove 411 is provided at the lower part of the crossbeam 41. The mounting groove 411 is stepped, and a sealing strip 412 is installed along the length of the mounting groove 411. The sealing strip 412 consists of an inner rigid substrate and an outer elastic filling layer. The inner rigid substrate is generally made of plastic, providing support and shape retention; the outer elastic filling layer can be made of rubber, which has good elasticity and can better conform to the ground to achieve a sealing effect. In some cases, the sealing strip 412 can also be made of one-piece molded rubber, as long as the sealing requirements are met.

[0043] The implementation principle of a civil defense door according to this application embodiment is as follows: The civil defense door effectively improves its sealing performance and ease of operation through a combination design of a locking mechanism 3 and a lifting sealing beam 4. The latch seat 31 in the locking mechanism 3 cooperates with the latch tongue 32, and with the auxiliary limiting of the rotating limit block 33, it can firmly lock the civil defense door, while simultaneously enhancing the sealing performance through sealing measures. The lifting sealing beam 4, through a simple linkage mechanism 45, allows for easy up-and-down movement of the beam 41 using a rotating handle 44, completing the seal between the beam, the door leaf 2, and the ground, avoiding the structural complexity and inconvenience of traditional telescopic cylinder methods. Compared to existing technologies, the overall structure is simpler and more reliable, reduces manufacturing costs, and better meets the sealing and safety requirements of civil defense buildings.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A blast door, characterized in that: include: The door frame (1), door leaf (2), lock (3), and lifting sealing beam (4) are provided. The door leaf (2) is hinged to the door frame (1). The lock (3) is located at the hinge of the door leaf (2) and the door frame (1) and at the open end of the door leaf (2). The lock (3) locks both sides of the door leaf (2). The lifting sealing beam (4) is located at the bottom of the door leaf (2) and is movably connected to the door leaf (2) to seal the bottom of the door leaf (2).

2. The blast door of claim 1, wherein: The locking mechanism (3) includes a latch seat (31) and a latch (32) that cooperate with each other. The latch seat (31) is fixed to the edge of the door frame (1), and the latch (32) is installed on the other edge of the door leaf (2) through an elastic reset member (321).

3. The blast door of claim 2, wherein: A rotation limiting block (33) is provided between the latch (32) and the buckle seat (31), and the rotation limiting block (33) is rotatably connected to the door leaf (2) or the door frame (1) through a torsion spring.

4. The blast door of claim 3, wherein: The inner wall of the buckle seat (31) is provided with an annular sealing groove (311), and a compressible silicone rubber sealing ring is embedded in the annular sealing groove (311). The surface of the silicone rubber sealing ring is hydrophobically treated. The side of the locking tongue (32) is provided with multiple micro air holes, and the micro air holes are filled with water-swellable waterproof adhesive.

5. The blast door of claim 4, wherein: The surface of the rotating limiting block (33) is provided with a wave-shaped anti-slip texture, and the part of the rotating limiting block (33) that contacts the buckle seat (31) and the locking tongue (32) is coated with a wear-resistant and friction-reducing coating.

6. The blast door of claim 1, wherein: The lifting sealing beam (4) includes a crossbeam (41) disposed at the bottom of the door leaf (2), a longitudinal beam (42) fixedly disposed above the crossbeam (41), an mounting sleeve (43) sleeved on the outside of the longitudinal beam (42) and fixedly connected to the door leaf (2), a handle (44) rotatably disposed on the door leaf (2), and a linkage mechanism (45). The linkage mechanism (45) includes a main linkage (451) and a secondary linkage (452). One end of the main linkage (451) is hinged to the pivot (441) of the handle (44), and the other end is hinged to the secondary linkage (452). The secondary linkage (452) includes a first secondary linkage (4521) hinged to the bottom of the longitudinal beam (42), and a secondary linkage (452) hinged to the handle (44). The second auxiliary rod (4522) is hinged to the top of the mounting sleeve (43). The first auxiliary rod (4521) and the second auxiliary rod (4522) are symmetrical about the hinge point with the main connecting rod (451). A connecting arm (442) is provided on the rotating shaft (441) and is hinged to the main connecting rod (451) through the connecting arm (442). The rotating shaft (441) drives the main connecting rod (451) to move toward or away from the longitudinal beam (42), drives the included angle between the first auxiliary rod (4521) and the second auxiliary rod (4522) to change, drives the longitudinal beam (42) to move up and down, and drives the crossbeam (41) to move up and down, so as to achieve the sealing between the door leaf (2) and the ground.

7. The blast door of claim 6, wherein: The longitudinal beams (42) are provided in two, two longitudinal beams (42) are respectively arranged at both ends of the cross beam (41), and the connecting rod mechanism (45) is provided in two sets.

8. The blast door of claim 6, wherein: The lower part of the cross beam (41) is provided with a double-layer mounting groove (411), the mounting groove (411) is arranged in a stepped manner, and a sealing rubber strip (412) is arranged in the mounting groove (411) along the length direction of the mounting groove (411).

9. The blast door of claim 8, wherein: The sealing rubber strip (412) is divided into an inner hard matrix and an outer elastic filling layer.

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