Threshold follow-up type nickel-saving stainless steel civil air defense door

Abstract

The utility model provides a threshold follow-up type nickel-saving type stainless steel civil air defense door, the threshold follow-up type nickel-saving type stainless steel civil air defense door comprises a door frame, a threshold, a door body and a driving assembly, in the door closing state, the threshold is attached to the door body, the protection performance of the civil air defense door is guaranteed, when the door is opened, the driving assembly drives a top plate of the threshold to descend, and the threshold is closed. Meanwhile, the two side plates are turned outwards, slopes are formed on the two sides, and passing is facilitated; when the door is closed, the driving assembly drives the top plate and the side plate to reset, and the protection performance of the civil defense door is guaranteed. Compared with an existing fixed doorsill, the doorsill follow-up type nickel-saving stainless steel civil air defense door is more convenient to pass through; compared with an existing detachable movable threshold, frequent disassembly and assembly are not needed, and use is more convenient; compared with an existing lifting type movable threshold, a groove does not need to be preset in advance or excavated on site, and installation is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of security technology, specifically relating to a threshold-following nickel-saving stainless steel civil defense door. Background Technology

[0002] Civil defense doors are the doors at the entrances and exits of civil defense projects. This type of door was the first to be standardized and has been widely used. Its characteristics are simple structure, reliable operation, and convenient maintenance. It is suitable for the entrances and exits of various civil defense projects. However, because it has a threshold, it is less commonly used in projects with frequent personnel and vehicle access, such as underground shopping malls that combine peacetime and wartime functions. Instead, movable threshold doors or drop doors of the same size and load rating are used.

[0003] Most existing thresholds are detachable and can be left uninstalled to facilitate passage. They are installed only when needed. However, this process is inconvenient and may not be able to be completed in time in case of emergencies, thus affecting the protective performance of the air-raid shelter.

[0004] Therefore, some retractable thresholds have emerged. When not in use, the threshold can be lowered to the ground for easy passage; when needed, the threshold can be raised in time to ensure its protective performance.

[0005] However, for lift-up door sills, part of the structure needs to be installed below ground level, so trenches need to be pre-designed or excavated on-site, making installation relatively inconvenient. Utility Model Content

[0006] This utility model provides a threshold-following nickel-saving stainless steel civil defense door, which aims to solve the technical problems described in the background art above.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a threshold-following nickel-saving stainless steel air-raid shelter door, comprising:

[0008] The door frame is fixed in place and has an internal door sill.

[0009] A threshold is located at the bottom of the door frame. The threshold includes a top plate and two side plates. The top plate is horizontally positioned and its two ends are slidably engaged with the door frame. The two side plates are respectively inclinedly positioned on both sides of the lower side of the top plate. The side plates are rotatably connected to the top plate and have the freedom to flip outward and return to their original position relative to the top plate.

[0010] The door body, rotatably fitted with the door frame and adapted to fit against the door edge, the bottom of the door body adapted to fit against the side panel; and

[0011] A drive assembly is connected to the door frame and the door body, and its power output end is connected to the top plate. It is used to drive the top plate to descend when the door is opened and to drive the top plate to rise and reset when the door is closed.

[0012] When the top plate descends, the two side plates flip outwards; when the top plate rises, the two sides flip inwards and reset.

[0013] In one possible implementation of the threshold-following nickel-saving stainless steel air-raid shelter door provided by this utility model, in the closed state, the top of the top plate is in contact with the bottom of the door edge.

[0014] In one possible implementation of the threshold-following nickel-saving stainless steel air defense door provided by this utility model, the top plate is provided with sliders at both ends, the door frame is provided with a sliding groove, and the sliders are slidably disposed in the sliding groove.

[0015] In one possible implementation of the threshold-following nickel-saving stainless steel air defense door provided by this utility model, the driving component includes a pushing component and a resetting component. The pushing component is connected to the door frame and is used to push the top plate downwards. The resetting component is used to drive the top plate and the side plate to reset.

[0016] In one possible implementation of the threshold-following nickel-saving stainless steel air defense door provided by this utility model, the reset assembly includes several springs, which are disposed on the lower side of the top plate and connected to the top plate at the upper end.

[0017] In one possible implementation of the threshold-following nickel-saving stainless steel air-raid shelter door provided by this utility model, the pushing assembly includes a first cylinder and two second cylinders. The cylinder body and piston rod of the first cylinder are rotatably connected to the door frame and the door body, respectively. The two second cylinders are respectively connected to the door frame on the upper side of both ends of the top plate. The piston rod of the second cylinder is adapted to abut against the top plate and push the top plate downward. The rod chamber of the first cylinder is connected to the rodless chamber of the two second cylinders through a pipeline.

[0018] In one possible implementation of the threshold-following nickel-saving stainless steel air-raid shelter door provided by this utility model, in the closed state, the piston rod of the second cylinder is at a preset distance from the top plate.

[0019] In one possible implementation of the threshold-following nickel-saving stainless steel air defense door provided by this utility model, the door body is made of nickel-saving stainless steel.

[0020] The beneficial effects of the threshold-following nickel-saving stainless steel air-raid shelter door provided by this utility model are as follows: Compared with the prior art, the threshold-following nickel-saving stainless steel air-raid shelter door provided by this utility model, when closed, has the threshold fitting snugly against the door body, ensuring the protective performance of the air-raid shelter door; when opening, the drive component drives the top plate of the threshold to descend, reducing the overall height of the threshold, while the two side plates flip outward, forming ramps on both sides for easy passage; when closing, the drive component drives the top plate and side plates of the threshold to return to their original positions, ensuring the protective performance of the air-raid shelter door; and compared with existing fixed thresholds, it is more convenient to pass through; compared with existing detachable movable thresholds, it does not require frequent disassembly and assembly, making it more convenient to use; compared with existing lifting movable thresholds, it does not require pre-setting grooves or excavating grooves on site, making installation more convenient. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of a threshold-following nickel-saving stainless steel air-raid shelter door provided for an embodiment of this utility model;

[0022] Figure 2 A top view of the closed structure of the threshold-following nickel-saving stainless steel air defense door provided in an embodiment of this utility model;

[0023] Figure 3 For along Figure 2 Cross-sectional view of line AA in the middle;

[0024] Figure 4 For along Figure 3 Cross-sectional view of the middle BB line;

[0025] Figure 5 A top view of the sill-following nickel-saving stainless steel blast door in the open state, provided for an embodiment of this utility model;

[0026] Figure 6 For along Figure 5 Cross-sectional view of the CC line;

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Door frame; 11. Door edge; 12. Track; 21. Top plate; 22. Side plate;

[0029] 30. Door body; 40. Spring; 51. First cylinder; 52. Second cylinder. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0037] Please refer to the following: Figures 1 to 2 The present invention provides a description of a threshold-following, nickel-saving stainless steel air-raid shelter door. The threshold-following, nickel-saving stainless steel air-raid shelter door includes a door frame 10, a threshold, a door body 30, and a drive assembly. The door frame 10 is fixedly installed and has an internal door edge 11. The threshold is located at the bottom of the door frame 10 and includes a top plate 21 and two side plates 22. The top plate 21 is horizontally installed and its two ends slide in engagement with the door frame 10. The two side plates 22 are respectively inclinedly installed on both sides below the top plate 21 and are rotatably connected to the top plate 21, having the freedom to flip outwards and return to their original position relative to the top plate 21. The door body 30 is rotatably engaged with the door frame 10 and is adapted to fit against the door edge 11. The bottom of the door body 30 is adapted to fit against the side plates 22. The drive assembly is connected to the door frame 10 and the door body 30, and its power output end is connected to the top plate 21, used to drive the top plate 21 to descend when the door is opened and to drive the top plate 21 to rise and return to its original position when the door is closed.

[0038] When the top plate 21 descends, the two side plates 22 flip outwards; when the top plate 21 rises, the two sides flip inwards and reset.

[0039] Specifically, the top plate 21 has chamfered corners at both ends and the side plate 22 has chamfered corners on the top side facing the top plate 21. The top plate 21 is hinged to the top of the side plate 22 to form an isosceles trapezoidal structure. When the door is closed, half of the corner of the top plate 21 fits into the chamfer of the side plate 22 to form a stable structure and ensure protective performance.

[0040] The beneficial effects of the threshold-following nickel-saving stainless steel air-raid shelter door provided in this embodiment of the present invention are as follows: Compared with the prior art, the threshold-following nickel-saving stainless steel air-raid shelter door provided in this embodiment of the present invention, when closed, has the threshold fitting snugly against the door body 30, ensuring the protective performance of the air-raid shelter door; when open, the drive component drives the top plate 21 of the threshold to descend, reducing the overall height of the threshold, while the two side plates 22 flip outward, forming ramps on both sides for easy passage; when closed, the drive component drives the top plate 21 and side plates 22 of the threshold to return to their original positions, ensuring the protective performance of the air-raid shelter door; and compared with existing fixed thresholds, it is more convenient to pass through; compared with existing detachable movable thresholds, it does not require frequent disassembly and assembly, making it more convenient to use; compared with existing lifting movable thresholds, it does not require pre-setting grooves or excavating grooves on site, making installation more convenient.

[0041] like Figure 1 and Figure 2 As shown in the embodiment of the threshold-following nickel-saving stainless steel air defense door provided in this utility model, when the door is closed, the top of the top plate 21 fits against the bottom of the door edge 11, effectively ensuring the protective effect.

[0042] like Figure 1 and Figure 2 As shown in the embodiment of the threshold-following nickel-saving stainless steel civil defense door provided in this utility model, the top plate 21 is provided with sliders at both ends, and the door frame 10 is provided with a sliding groove 12, and the sliders are slidably disposed in the sliding groove 12.

[0043] Specifically, the slider can be a rectangular structure, or it can be a T-shaped or dovetail-shaped structure.

[0044] like Figure 1 and Figure 2 As shown in the embodiment of the threshold-following nickel-saving stainless steel air defense door provided in this utility model, the driving component push component and the reset component are provided. The push component is connected to the door frame 10 and is used to push the top plate 21 downward. The reset component is used to drive the top plate 21 and the side plate 22 to reset.

[0045] Specifically, such as Figure 1 and Figure 2 As shown in the embodiment of the threshold-following nickel-saving stainless steel air defense door provided in this utility model, the reset component includes several springs 40, which are disposed on the lower side of the top plate 21 and connected to the top plate 21 at the upper end; the springs 40 push the top plate 21 to reset and drive the side plates 22 on both sides to reset.

[0046] Specifically, the reset component can also be a torsion spring, which is connected to the top plate 21 and the side plate 22. The torsion spring drives the side plate 22 to reset through elastic force, and drives the top plate 21 to reset.

[0047] More specifically, such as Figure 1 and Figure 2 As shown in the embodiment of the threshold-following nickel-saving stainless steel air-raid shelter door provided in this utility model, the push assembly includes a first cylinder 51 and two second cylinders 52. The cylinder body and piston rod of the first cylinder 51 are rotatably connected to the door frame 10 and the door body 30, respectively. The two second cylinders 52 are respectively located on the upper side of both ends of the top plate 21 and connected to the door frame 10. The piston rod of the second cylinder 52 is adapted to abut against the top plate 21 and push the top plate 21 downward. The rod chamber of the first cylinder 51 is connected to the rodless chamber of the two second cylinders 52 through a pipeline.

[0048] Specifically, the cylinder body of the first cylinder 51 rotates with the top of the door frame 10, and the piston rod rotates with the door body 30. When the door is opened, the volume of the rod chamber of the first cylinder 51 decreases, and gas enters the rodless chamber of the second cylinder 52, causing the piston rod of the second cylinder 52 to extend and push the top plate 21 downward, lowering the threshold and forming ramps on both sides through the side plates 22 for easy passage. When the door is closed, the volume of the rod chamber of the first cylinder 51 increases, and the gas in the rodless chamber of the second cylinder 52 is drawn into the rod chamber of the first cylinder 51. The piston rod of the second cylinder 52 retracts, releasing the top plate 21. The top plate 21 and the side plates 22 are reset under the action of the spring 40, ensuring the protective performance of the blast door when the door is closed.

[0049] More specifically, such as Figure 1 and Figure 2 As shown, in a specific embodiment of the threshold-following nickel-saving stainless steel air defense door provided in this utility model embodiment, in the closed state, the piston rod of the second cylinder 52 is at a preset distance from the top plate 21.

[0050] It should be noted that when the door is opened, the top plate 21 will be driven to descend and the side plate 22 will be driven to unfold only after the door 30 is opened to a certain extent, so as to effectively avoid interference between the side plate 22 and the door 30. The preset distance is set according to the actual situation, so as to avoid interference between the side plate 22 and the door 30.

[0051] like Figure 1 and Figure 2 As shown, in a specific embodiment of the threshold-following nickel-saving stainless steel civil defense door provided in this utility model embodiment, the door body 30 is made of nickel-saving stainless steel.

[0052] It should be noted that nickel-saving stainless steel is an existing material used to reduce the thickness and weight of the door.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A threshold-following, nickel-saving stainless steel air-raid shelter door, characterized in that, include: The door frame is fixed in place and has an internal door sill. A threshold is located at the bottom of the door frame. The threshold includes a top plate and two side plates. The top plate is horizontally positioned and its two ends are slidably engaged with the door frame. The two side plates are respectively inclinedly positioned on both sides of the lower side of the top plate. The side plates are rotatably connected to the top plate and have the freedom to flip outward and return to their original position relative to the top plate. The door body is rotatably fitted with the door frame and adapted to fit against the door edge, and the bottom of the door body is adapted to fit against the side panel; as well as A drive assembly is connected to the door frame and the door body, and its power output end is connected to the top plate. It is used to drive the top plate to descend when the door is opened and to drive the top plate to rise and reset when the door is closed. When the top plate descends, the two side plates flip outwards; when the top plate rises, the two sides flip inwards and reset.

2. The threshold-following, nickel-saving stainless steel air-raid shelter door as described in claim 1, characterized in that, When the door is closed, the top of the top plate is flush with the bottom of the door edge.

3. The threshold-following, nickel-saving stainless steel air-raid shelter door as described in claim 1, characterized in that, The top plate is provided with sliders at both ends, and a sliding groove is provided on the inner side of the door frame, with the sliders slidingly disposed in the sliding groove.

4. The threshold-following, nickel-saving stainless steel air-raid shelter door as described in claim 1, characterized in that, The drive assembly includes a push assembly and a reset assembly. The push assembly is connected to the door frame and is used to push the top plate downwards. The reset assembly is used to drive the top plate and the side plate to reset.

5. The threshold-following, nickel-saving stainless steel air-raid shelter door as described in claim 4, characterized in that, The reset assembly includes several springs, which are disposed on the lower side of the top plate and connected to the top plate at the upper end.

6. The threshold-following, nickel-saving stainless steel air-raid shelter door as described in claim 4, characterized in that, The pushing assembly includes a first cylinder and two second cylinders. The cylinder body and piston rod of the first cylinder are rotatably connected to the door frame and the door body, respectively. The two second cylinders are respectively connected to the door frame on the upper side of both ends of the top plate. The piston rods of the second cylinders are adapted to abut against the top plate and push the top plate downward. The rod chamber of the first cylinder is connected to the rodless chamber of the two second cylinders through a pipeline.

7. The threshold-following, nickel-saving stainless steel air-raid shelter door as described in claim 6, characterized in that, With the door closed, the piston rod of the second cylinder is at a preset distance from the top plate.

8. The threshold-following nickel-saving stainless steel air-raid shelter door as described in any one of claims 1-7, characterized in that, The door is made of nickel-saving stainless steel.

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