Folding air defense door

Abstract

This utility model relates to the field of air-raid shelter door technology and discloses a folding air-raid shelter door. The folding air-raid shelter door includes a main door, a secondary door, and a locking mechanism. The secondary door and the main door are pivotally connected by a hinge. The secondary door has a first position coplanar with the main door and a second position forming an angle with the main door. Both the secondary door and the main door are equipped with locking mechanisms. The folding air-raid shelter door provided by this utility model can be folded and stored, significantly reducing the space occupied when the air-raid shelter door is open, lowering the requirements for the width of the entrance to the air-raid shelter, and also helping to reduce project costs.

Description

Technical Field

[0001] This utility model relates to the field of civil defense door technology, specifically to a folding civil defense door. Background Technology

[0002] According to Article 3.3.7 of the "Design Code for Civil Air Defense Underground Shelters," "The clear width and clear height of protective airtight doors and the passageways in front of airtight doors shall meet the requirements for the opening and installation of the door panels." For example... Figure 1 As shown, in actual engineering projects, sometimes due to site constraints, such as interference from the wall 16, the traditional air-raid shelter door 17 cannot be opened to 90 degrees. The opening angle of the traditional air-raid shelter door 16 is small and it cannot be stored in the proper position, resulting in the air-raid shelter door occupying the space for vehicle passage or the space of the parking space that could have been set up. Utility Model Content

[0003] One of the technical problems that this application aims to solve is that traditional air-raid shelter doors cannot be opened to 90 degrees due to the limitations of the building site, and they occupy a lot of space.

[0004] This utility model provides a folding air defense door to address the shortcomings of existing technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A folding air defense door includes a main door, a secondary door, and a locking mechanism. The secondary door and the main door are pivotally connected by a hinge. The secondary door has a first position coplanar with the main door and a second position at an angle to the main door. Both the secondary door and the main door are equipped with locking mechanisms.

[0007] In some embodiments, the folding air-raid shelter door further includes a rubber strip groove, a sealing strip, a first pressing plate, and a second pressing plate; the rubber strip groove and the hinge are located on both sides of the main door and connected to the main door; the sealing strip is located between the rubber strip groove and the main door and connected to the rubber strip groove; one end of the first pressing plate is connected to the main door, and the other end presses against the sealing strip; the second pressing plate is fixedly connected to the sub-door; when the sub-door is in the first position, the second pressing plate presses against the sealing strip; the sealing strip, the first pressing plate, and the second pressing plate extend in parallel directions and have equal lengths.

[0008] In some embodiments, the sealing strip groove includes an L-shaped steel and a sloping side plate. The L-shaped steel includes a first flat plate portion and a second flat plate portion connected to each other. The first flat plate portion is connected to the main door, and the second flat plate portion extends toward a first position of the sub-door. The sloping side plate is located in the gap between the second flat plate portion and the main door and is connected to the second flat plate portion. The sealing strip is held between the sloping side plate and the first flat plate portion.

[0009] In some embodiments, the first plate portion is perpendicular to the mother door, and the second plate portion is parallel to the mother door.

[0010] In some embodiments, the end of the inclined side plate near the mother door is inclined toward the first flat plate portion.

[0011] In some embodiments, a duct fan is provided on the main door, the duct fan runs through the front and rear sides of the main door, and an end cap is provided at one end of the duct fan.

[0012] In some embodiments, the folding air-raid shelter door further includes a hinge connected to the main door; one of the hinges and the child door is connected to the left end of the main door, and the other is connected to the right end of the main door.

[0013] In some embodiments, the hinge includes a first ear plate, a second ear plate, a first connecting plate, a second connecting plate, and a pivot. The first ear plate and the second ear plate are both fixedly connected to the mother door, and the first connecting plate and the second connecting plate are both fixedly connected to the daughter door. The pivot is vertically arranged, and one end of the first connecting plate is rotatably connected to the first ear plate through the pivot. One end of the second connecting plate is rotatably connected to the second ear plate through the pivot.

[0014] In some embodiments, the distance between the end face of the sub-gate near the pivot and the pivot is not less than the thickness of the sub-gate.

[0015] In some embodiments, one or more positioning jacks are provided below the main door and the child door.

[0016] Compared with existing technologies, the folding air-raid shelter door provided by this utility model can be folded and stored, which greatly reduces the space occupied when the air-raid shelter door is opened, has lower requirements for the width of the entrance and exit of the air-raid shelter, and is also conducive to reducing the project cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a diagram showing the existing air-raid shelter doors when opened to their maximum angle under limited space conditions.

[0019] Figure 2 This is a front view of an embodiment of the present utility model.

[0020] Figure 3 This is a rear view of an embodiment of the present utility model.

[0021] Figure 4 This is a top view of an embodiment of the present utility model.

[0022] Figure 5 yes Figure 4 A magnified view of section I in the middle.

[0023] Figure 6 This is a right view of an embodiment of the present utility model.

[0024] Figure 7 This is a front view of the hinge and mounting plate after they are connected in an embodiment of this utility model.

[0025] Figure 8 yes Figure 7 Top view.

[0026] Figure 9 Is Figure 1 The diagram shows the addition of a hinge to the left side of the main door.

[0027] Figure 10 This is a top view of the child door after it has been folded relative to the mother door in an embodiment of this utility model.

[0028] Figure 11 This is a top view of the child door after it has been folded relative to the mother door in another embodiment of this utility model.

[0029] Figure 12 This is a schematic diagram of the present invention after being folded and stored during actual use.

[0030] The annotations in the attached figures are explained as follows:

[0031] In the diagram: 1. Main door; 2. Sub-door; 3. Locking mechanism; 301. Dial wheel; 4. Hinge; 401. First ear plate; 402. Second ear plate; 403. First connecting plate; 404. Second connecting plate; 405. Rotating shaft; 5. Rubber strip groove; 501. L-shaped steel; 5011. First flat plate; 5012. Second flat plate; 502. Slanted side plate; 6. Sealing strip; 7. First pressing plate; 8. Second pressing plate; 9. Duct fan; 10. End cover; 11. Hinge; 12. Positioning jack; 13. First mounting plate; 14. Second mounting plate; 15. Handle; 16. Wall; 17. Traditional air-raid shelter door. Detailed Implementation

[0032] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0033] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0034] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0037] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0038] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0039] See Figures 2-12 As shown, this utility model provides a folding air defense door, which includes a main door 1, a secondary door 2, and a locking mechanism 3. The secondary door 2 is pivotally connected to the main door 1 via a hinge 4. The secondary door 2 has a first position coplanar with the main door 1 and a second position forming an angle with the main door 1. Both the secondary door 2 and the main door 1 are equipped with the locking mechanism 3. Figure 4 and Figure 10 As shown, sub-gate 2 from Figure 4 After rotating a certain angle relative to the main gate 1, the first position in the middle moves to... Figure 10 The second position in the list.

[0040] To improve the shock wave resistance and airtightness of the airtight door against radioactive contamination, the folding airtight door of this invention also features a sealing structure. This sealing structure mainly consists of a rubber strip groove 5, a sealing strip 6, a first pressing plate 7, and a second pressing plate 8. The rubber strip groove 5 is used to install the sealing strip 6, and the rubber strip groove 5 and the hinge 4 are located on opposite sides of the main door 1 and are fixedly connected to the main door 1. (See also...) Figure 4 and Figure 5 As shown, the rubber strip groove 5 is installed at the rightmost end of the main door 1, and the extension direction of the rubber strip groove 5 is perpendicular to the horizontal plane; the sealing strip 6 can be made of rubber, and the sealing strip 6 is located between the rubber strip groove 5 and the main door 1 and connected to the rubber strip groove 5; one end of the first pressing plate 7 is fixedly connected to the main door 1, and the other end squeezes the sealing strip 6; the second pressing plate 8 is fixedly connected to the daughter door 2, and the second pressing plate 8 can move together with the daughter door 2; when the daughter door 2 is in the first position, the second pressing plate 8 squeezes the sealing strip 6, and the sealing structure at this time seals the gap between the daughter door 2 and the main door 1, thereby achieving a good seal between the daughter door 2 and the main door 1; in order to completely seal the entire gap between the daughter door 2 and the main door 1, the extension directions of the sealing strip 6, the first pressing plate 7, and the second pressing plate 8 are parallel and the lengths are equal.

[0041] To ensure a more ideal sealing effect from the aforementioned sealing structure, when the sub-door 2 is in the second position, the second pressing plate 8 should press into the sealing strip 6 by 4-5 mm. Furthermore, the second pressing plate 8 should not cause the sealing strip 6 to tear or separate from the adhesive strip groove 5 when pressing into it. In this invention, the first pressing plate 7 prevents the sealing strip 6 from deforming towards the mother door 1, thereby reducing the risk of the sealing strip 6 falling out of the adhesive strip groove 5 when the second pressing plate 8 presses against it.

[0042] See Figure 5As shown, the sealing strip groove 5 includes an L-shaped steel 501 and an inclined side plate 502. The L-shaped steel 501 includes a first flat plate portion 5011 and a second flat plate portion 5012 that are perpendicularly connected to each other. The first flat plate portion 5011 is welded and fixed to the main door 1, and the second flat plate portion 5012 extends toward a first position towards the secondary door 2. The inclined side plate 502 is located in the gap between the second flat plate portion 5012 and the main door 1 and is welded and fixed to the second flat plate portion 5012. The sealing strip 6 is clipped between the inclined side plate 502 and the first flat plate portion 5011. In a specific implementation, the first flat plate portion 5011 is perpendicular to the main door 1, and the second flat plate portion 5012 is parallel to the main door 1. To improve the fixing effect of the sealing strip 6, the end of the inclined side plate 502 near the mother door 1 is inclined towards the first flat plate portion 5011. In other words, the distance between the end of the inclined side plate 502 near the mother door 1 and the first flat plate portion 5011 is less than the distance between the end of the inclined side plate 502 away from the mother door 1 and the first flat plate portion 5011. In this way, the sealing strip 6 is not easy to fall off after it is inserted between the inclined side plate 502 and the first flat plate portion 5011.

[0043] In some embodiments of this utility model, a duct fan 9 is provided on the main door 1, and the duct fan 9 penetrates the front and rear surfaces of the main door 1. An end cover 10 is provided at one end of the duct fan 9. The end cover 10 is pivotally connected to one end of the duct fan 9. The end cover 10 can block the duct fan 9, and the end cover 10 can also be opened when ventilation is required by the duct fan 9.

[0044] See Figure 9 As shown, the folding air-raid shelter door also includes a hinge 11 connected to the main door 1. During construction, the main door 1 can be installed in the doorway via the hinge 11, simultaneously enabling the opening and closing of the main door 1. One of the hinges, 11 and 2, is connected to the left end of the main door 1, and the other is connected to the right end of the main door 1. Figure 9 As shown, in this embodiment, hinge 11 is installed on the left end of the main door 1, and child door 2 is installed on the right end of the main door 1.

[0045] In some embodiments, the hinge 4 includes a first ear plate 401, a second ear plate 402, a first connecting plate 403, a second connecting plate 404, and a pivot 405. Both the first ear plate 401 and the second ear plate 402 are fixedly connected to the main door 1 via a first mounting plate 13. Both the first connecting plate 403 and the second connecting plate 404 are fixedly connected to the secondary door 2 via a second mounting plate 14. The pivot 405 is vertically arranged. One end of the first connecting plate 403 is rotatably connected to the first ear plate 401 via the pivot 405, and one end of the second connecting plate 404 is rotatably connected to the second ear plate 402 via the pivot 405. Bolt holes are provided on both the first mounting plate 13 and the second mounting plate 14, and threaded holes are provided at corresponding positions on the main door 1 and the secondary door 2. The first mounting plate 13 is fixedly connected to the main door 1 via bolts, and the second mounting plate 14 is fixedly connected to the secondary door 2 via bolts. To improve the structural strength and load-bearing capacity of the hinge 4, a stiffening rib can be welded between the first connecting plate 403 and the second connecting plate 404.

[0046] In this invention, by setting the position of the rotating shaft 405 outside the cross-sectional area of ​​the mother door 1, it is beneficial to reduce the gap between the daughter door 2 and the mother door 1 when the daughter door 2 is in the second position.

[0047] Ideally, when the air-raid shelter door is closed, the second pressing plate 8 on the sub-door 2 should press the sealing strip 6 at an angle perpendicular to it. This prevents the sealing strip 6 from shifting laterally when the air-raid shelter door is closed. To achieve this, the distance between the end face of the sub-door 2 near the pivot 405 and the pivot 405 should be as large as possible. In this embodiment, to reduce the lateral displacement of the sealing strip 6 when the air-raid shelter door is closed, the distance between the end face of the sub-door 2 near the pivot 405 and the pivot 405 is not less than the thickness of the sub-door 2.

[0048] like Figure 10 As shown, in some embodiments, when the sub-door 2 is in the second position, the dial 301 on the sub-door 2 interferes with the dial 301 on the mother door 1. Therefore, the sub-door 2 cannot be parallel to the mother door 1 when closed. In this embodiment, the angle between the sub-door 2 in the second position and the sub-door 2 in the first position can be selected within the range of 160° to 170°. Figure 11 As shown, in other embodiments, if the dial 301 on the sub-door 2 does not interfere with the dial 301 on the mother door 1 when the sub-door 2 is in the second position, then the sub-door 2 can remain parallel to the mother door 1 when closed.

[0049] In some embodiments, one or more positioning jacks 12 may be provided below the main door 1 and the child door 2, and handles 15 may be provided on both the child door 2 and the main door 1. The locking mechanism 3 used in this utility model is conventional technology in the art, and its structure and function are well known to those skilled in the art, so it will not be described in detail in this specification.

[0050] In this invention, the child door 2 and the main door 1 are connected by the aforementioned hinge 4. When closed, the child door 2 will not interfere with the main door 1. Furthermore, the hinge 4 has a simple structure, making it easy to replace and maintain. In this embodiment, the use of three hinges 4 between the child door 2 and the main door 1 provides sufficient safety redundancy and improves the reliability of the folding air-raid shelter door. For example, if one of the hinges 4 is damaged or worn out, it can be directly replaced without the need for external equipment, allowing continued use.

[0051] In practical implementation of this invention, when the air-raid shelter door is closed, the gap between the sub-door 2 and the main door 1 should be as small as possible, typically controlled at 5-8mm. The width of the sub-door 2 is usually smaller than the width of the main door 1, so that the sub-door 2 is stored within the plane of the main door 1, ensuring that the folded sub-door 2 does not interfere with the normal use of the accessories on the main door 1.

[0052] See Figure 12 As shown, when this folding air-raid shelter door is normally opened, the secondary door 2 folds relative to the primary door 1, reducing the space occupied by the air-raid shelter door when open. See also... Figure 2 and Figure 4 As shown, when the folding air-raid shelter door is closed during wartime, the sub-door 2 rotates to the first position coplanar with the main door 1 to ensure a protective sealing effect.

[0053] The folding air-raid shelter door provided by this utility model adopts a folding structure, which can be folded and stored, significantly reducing the space occupied when the air-raid shelter door is open. It also lowers the width requirements for the entrance and exit of the air-raid shelter and helps reduce project costs. Furthermore, the sealing structure used in this folding air-raid shelter door has good resistance to shock waves and radiation, meeting the requirements for shock wave resistance and radiation protection of air-raid shelter doors.

[0054] In summary, the folding air-raid shelter door provided by this utility model not only has the required air-raid shelter functions, but also effectively solves the technical problem that traditional air-raid shelter doors cannot be opened 90 degrees and occupy a lot of space when the building site is limited.

[0055] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0056] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A folding civil air defense door, characterized in that: It includes a main door (1), a sub-door (2) and a locking mechanism (3). The sub-door (2) is pivotally connected to the main door (1) via a hinge (4). The sub-door (2) has a first position coplanar with the main door (1) and a second position at an angle to the main door (1). Both the sub-door (2) and the main door (1) are provided with locking mechanisms (3).

2. The folding air-raid shelter door according to claim 1, characterized in that, Also includes: The rubber strip groove (5) is located on both sides of the main door (1) and connected to the main door (1) respectively, along with the hinge (4); A sealing strip (6) is located between the adhesive strip groove (5) and the mother door (1) and is connected to the adhesive strip groove (5); A first pressing plate (7), one end of which is connected to the main door (1), and the other end of which presses against the sealing strip (6); and The second pressing plate (8) is fixedly connected to the sub-door (2); when the sub-door (2) is in the first position, the second pressing plate (8) presses the sealing strip (6).

3. The folding air-raid shelter door according to claim 2, characterized in that: The adhesive strip groove (5) includes an L-shaped steel (501) and a sloping side plate (502). The L-shaped steel (501) includes a first flat plate portion (5011) and a second flat plate portion (5012) connected to each other. The first flat plate portion (5011) is connected to the main door (1), and the second flat plate portion (5012) extends toward the first position of the sub-door (2). The sloping side plate (502) is located in the gap between the second flat plate portion (5012) and the main door (1) and is connected to the second flat plate portion (5012). The sealing strip (6) is stuck between the sloping side plate (502) and the first flat plate portion (5011).

4. The folding air-raid shelter door according to claim 3, characterized in that: The first plate portion (5011) is perpendicular to the mother door (1), and the second plate portion (5012) is parallel to the mother door (1).

5. The folding air-raid shelter door according to claim 4, characterized in that: The inclined side plate (502) is inclined toward the first flat plate (5011) at one end near the mother door (1).

6. The folding air-raid shelter door according to any one of claims 1 to 5, characterized in that: The main door (1) is equipped with a duct fan (9), which penetrates the front and rear sides of the main door (1). One end of the duct fan (9) is equipped with an end cap (10).

7. The folding air-raid shelter door according to any one of claims 1 to 5, characterized in that: It also includes a hinge (11) connected to the main door (1); one of the hinge (11) and the child door (2) is connected to the left end of the main door (1), and the other is connected to the right end of the main door (1).

8. The folding air-raid shelter door according to any one of claims 1 to 5, characterized in that: The hinge (4) includes a first ear plate (401), a second ear plate (402), a first connecting plate (403), a second connecting plate (404), and a pivot (405). The first ear plate (401) and the second ear plate (402) are both fixedly connected to the mother door (1), and the first connecting plate (403) and the second connecting plate (404) are both fixedly connected to the daughter door (2). The pivot (405) is vertically arranged. One end of the first connecting plate (403) is rotatably connected to the first ear plate (401) through the pivot (405), and one end of the second connecting plate (404) is rotatably connected to the second ear plate (402) through the pivot (405).

9. The folding air-raid shelter door according to claim 8, characterized in that: The distance between the end face of the sub-door (2) near the rotating shaft (405) and the rotating shaft (405) is not less than the thickness of the sub-door (2).

10. The folding air-raid shelter door according to any one of claims 1 to 5, characterized in that: One or more positioning jacks (12) are provided below each of the mother door (1) and the daughter door (2).

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