Energy absorption structure for civil air defense door

Abstract

The utility model discloses an energy absorption structure for a civil air defense door, which comprises a rectangular frame and a built-in grid frame, and the rectangular frame is divided into a plurality of cells by the grid frame. Annular blocking frames are installed at the front end and the rear end of the rectangular frame, the annular blocking frames and the grid frame jointly form an energy absorption space, a rectangular bottom plate is arranged in the space, one face of the bottom plate is tightly attached to the annular blocking frames and further protrudes to form rectangular protruding plates, and the protruding plates are attached to the inner edges of the annular blocking frames in a sliding mode. A plurality of sleeves are distributed in the cells and fixed to the grid frame, and sliding rods are arranged on the bottom plate and inserted into the sleeves. Limiting rings are further arranged on the bottom plates, and the positions of the limiting rings of the two bottom plates are in one-to-one correspondence. In addition, elastic compression pieces are arranged in the cells, the two ends of each elastic compression piece are arranged in the corresponding limiting rings of the two bottom plates respectively, and when the bottom plates are tightly attached to the annular blocking frame, the elastic compression pieces are in a compressed state. According to the structure, the thickness of the steel plate can be reduced, steel materials are reduced, the total weight of the civil air defense door is reduced, meanwhile, it can be guaranteed that the civil air defense door has enough structural strength, and impact can be effectively absorbed.

Description

Technical Field

[0001] The utility model relates to the technical field of civil air defense doors, in particular to an energy absorbing structure for civil air defense doors. Background Art

[0002] Civil air defense doors are widely used in public places, commercial buildings, residential areas and underground civil air defense projects to provide security, such as hotels, commercial buildings, schools, university campuses, public transportation stations, large public buildings and performing arts venues. In an emergency, civil air defense doors can be used as shelters or emergency evacuation passages to ensure the safety of personnel.

[0003] Generally, civil air defense doors are welded from multiple steel castings and steel plates. During the design and manufacturing process, it is necessary to fully consider its structural stability, impact resistance and overall weight. The original civil air defense doors were made of the simplest thick steel plates, which had excellent protection performance, but were too heavy overall, shortening the bearing life of the hinges and making them inconvenient to install and switch.

[0004] Therefore, it is necessary to design an energy-absorbing structure, which can firstly reduce the thickness of the steel plate, reduce the steel material, and reduce the overall weight of the civil air defense door, while at the same time ensuring that the civil air defense door has sufficient structural strength to effectively absorb the impact. Utility Model Content

[0005] The purpose of the utility model is to provide an energy absorbing structure for a civil air defense door to solve the problems described in the background technology.

[0006] The technical solution of the utility model is achieved in this way:

[0007] An energy absorption structure for a civil air defense door comprises a rectangular frame and a grid frame fixedly connected to the rectangular frame, wherein the grid frame divides the interior of the rectangular frame into a plurality of cells, and an annular baffle frame is fixedly provided on the front and rear faces of the rectangular frame respectively, and the front and rear annular baffle frames are clamped with the grid frame respectively to form front and rear energy absorption spaces, and rectangular bottom plates are respectively provided in the two energy absorption spaces, and a side of the bottom plate facing away from the grid frame abuts against the annular baffle frame so that the bottom plate cannot escape from the annular baffle frame outwardly, and a side of the bottom plate facing away from the grid frame also protrudes outwardly to form a rectangular convex plate, and the outer edge of the convex plate is slidably fitted and connected with the inner edge of the annular baffle frame, and the cells A plurality of sleeves are also provided inside, and the sleeves are fixed on the grid frame. A sliding rod for inserting the sleeves is also fixed on the side of the bottom plate facing the grid frame. One sleeve is only inserted by one sliding rod, and the bottom plate is slidably connected in the sleeve through the sliding rod. A plurality of limiting rings are also fixed on the side of the bottom plate facing the grid frame. The limiting rings of the two bottom plates are positioned one by one, and each limiting ring is within the range of the vertical projection of the cell to the bottom plate. An elastic compression part is also provided in the cell, and the two ends of the elastic compression part are respectively arranged in two limiting rings that are positioned one by one in the two bottom plates, and the elastic compression part is in a compressed state when the bottom plate is against the annular baffle frame.

[0008] When the above solution is used, when an explosion or impact occurs, the bottom plate and the convex plate absorb the impact force and slide toward the inside of the rectangular frame, thereby forming an energy absorbing effect.

[0009] By setting up the energy-absorbing space, the material investment in this part of the energy-absorbing space is saved, the overall weight of the civil air defense door is reduced, and physical space for the bottom plate to slide is provided.

[0010] By setting up elastic compression parts, the deformation of the elastic compression parts is used to absorb the impact force of the bottom plate. At the same time, compared with the filling of all-steel materials, the elastic compression parts have a lower unit volume density and can more effectively reduce the overall weight of the civil air defense door when filling the same space. In addition, the elastic compression parts can also form a multi-point support effect on the bottom plate to prevent the bottom plate from being severely deformed when impacted.

[0011] By setting up a grid frame, the grid frame not only provides the overall structural strength inside the rectangular frame, but also saves material investment in the space inside the unit cell, reduces the overall weight of the civil defense door, and at the same time provides a guarantee for the movement of the base plate.

[0012] By setting the sleeve and the slide rod, the matching design of the sleeve and the slide rod provides a preset trajectory for the sliding of the bottom plate, and the slide rod can also form a multi-point structural reinforcement effect on the bottom plate to prevent serious deformation of the bottom plate when it is impacted.

[0013] By setting a sliding and fitting connection between the convex plate and the annular baffle frame, on the one hand, the space is fully utilized to increase the thickness of the bottom plate and improve the structural strength. On the other hand, the sealing between the bottom plate and the annular baffle frame is improved, thereby improving the airtightness of the civil air defense door.

[0014] A further technical solution is that the grid frame is composed of a plurality of cross bars and a plurality of vertical bars that are staggered and connected to each other, and the cells are rectangular cells.

[0015] A further technical solution is that at least two sleeves are provided in each cell, and the multiple sleeves in the cell are centrally symmetrically arranged with the cell center as the axis of symmetry.

[0016] A further technical solution is that the elastic compression member is a spring.

[0017] A further technical solution is that the elastic compression member is a shock-absorbing rubber block.

[0018] The beneficial effects of the utility model are:

[0019] 1. Save materials and reduce weight: By setting up energy-absorbing space, not only the material input of this part of the space is saved, but also the overall weight of the civil air defense door is effectively reduced. By setting up a grid frame, not only the overall structural strength inside the rectangular frame is enhanced, but also the weight is further reduced. At the same time, it can provide support for the movement of the bottom plate, play a role in bottoming out, and ensure the stability of the structure. By setting a thinner bottom plate and convex plate, the overall weight is reduced.

[0020] 2. Impact absorption: The design of the bottom plate and the convex plate can effectively absorb the impact force in the event of an explosion or impact. By sliding into the inside of the rectangular frame, the elastic compression part can absorb the impact force by its own deformation to play an energy-absorbing role, thereby reducing the thickness of the bottom plate and improving the impact resistance of the overall structure.

[0021] 3. Advantages of elastic compression parts: Compared with all-steel materials, their unit volume density is lower, which not only reduces the weight of the door, but also provides multi-point support to prevent the bottom plate from being severely deformed when impacted, thereby enhancing the stability and safety of the structure.

[0022] 4. Design of sleeve and slide bar: The cooperation of sleeve and slide bar provides a stable preset track for the sliding of the bottom plate, enhancing the controllability and stability of the structure. At the same time, the multi-point structural reinforcement of the slide bar further prevents serious deformation of the bottom plate.

[0023] 5. The fitting connection between the convex plate and the annular baffle frame: This design not only increases the thickness of the base plate and improves the structural strength, but also significantly improves the sealing between the base plate and the annular baffle frame, thereby enhancing the overall sealing performance of the civil air defense door and ensuring its reliability and safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram (front view) of the utility model in a disassembled state;

[0025] Figure 2 It is a three-dimensional schematic diagram of the utility model in a disassembled state (back side);

[0026] Figure 3 It is a side view schematic diagram of the utility model in a disassembled state;

[0027] Figure 4 It is a schematic diagram of the connection between the rectangular frame and the grid frame;

[0028] Figure 5 It is a three-dimensional cross-sectional schematic diagram of the connection between the rectangular frame and the grid frame;

[0029] Figure 6 It is a sectional stereoscopic schematic diagram of the utility model in the assembled state.

[0030] In the figure, 1, rectangular frame, 2, bottom plate, 3, convex plate, 4, limit ring, 5, slide rod, 6, grid frame, 7, elastic compression member, 8, unit cell, 9, sleeve, 10, annular baffle frame, 11, energy absorption space. DETAILED DESCRIPTION

[0031] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0032] See also Figures 1 to 6 An energy absorbing structure for a civil air defense door comprises a steel rectangular frame 1 and a grid frame 6 fixedly welded in the rectangular frame 1, wherein the grid frame 6 divides the interior of the rectangular frame 1 into a plurality of cells 8.

[0033] The grid frame 6 is composed of a plurality of cross bars and a plurality of vertical bars which are staggered and connected to each other, and the cells 8 are rectangular cells 8 .

[0034] The front and rear faces of the rectangular frame 1 are respectively welded with an annular baffle frame 10 , which is a rectangular steel frame. The front and rear annular baffle frames 10 are respectively clamped with the grid frame 6 to form front and rear energy absorption spaces 11 .

[0035] A rectangular bottom plate 2 is provided in each of the two energy absorbing spaces 11. The side of the bottom plate 2 facing away from the grid frame 6 abuts against the annular baffle frame 10 so that the bottom plate 2 cannot escape from the annular baffle frame 10. The side of the bottom plate 2 facing away from the grid frame 6 also protrudes outward to form a rectangular convex plate 3. The outer edge of the convex plate 3 is slidably fitted with the inner edge of the annular baffle frame 10.

[0036] A plurality of sleeves 9 are further provided in the cell 8 , and the sleeves 9 are welded to the grid frame 6 . Two sleeves 9 are provided in each cell 8 , and the two sleeves 9 in the cell 8 are centrally symmetrically arranged with the center of the cell 8 as the axis of symmetry.

[0037] A sliding rod 5 for inserting the sleeve 9 is fixedly arranged on the side of the bottom plate 2 facing the grid frame 6, and one sleeve 9 is inserted by only one sliding rod 5. The bottom plate 2 is slidably connected in the sleeve 9 through the sliding rod 5.

[0038] A plurality of limiting rings 4 are welded to the side of the bottom plate 2 facing the grid frame 6 . The limiting rings 4 of the two bottom plates 2 are aligned one by one, and each limiting ring 4 is within the range of the vertical projection of the cell 8 onto the bottom plate 2 .

[0039] An elastic compression member 7 is also provided in the cell 8, and two ends of the elastic compression member 7 are respectively provided in two stop rings 4 aligned one by one in the two bottom plates 2. When the bottom plate 2 and the annular stop frame 10 are against each other, the elastic compression member 7 is in a compressed state.

[0040] Preferably, the elastic compression member 7 is a spring, or a cylindrical shock-absorbing rubber block.

[0041] During production, first place the rear bottom plate 2 into the rectangular frame 1, and weld the rear annular baffle frame 10, then put in the elastic compression member 7, place the front bottom plate 2 into the rectangular frame 1, press the front bottom plate 2 downward with equipment, and align the front annular baffle frame 10 for welding. After welding, release the front bottom plate 2 to reset the internal elastic compression member 7.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy absorbing structure for a civil air defense door, characterized in that: The utility model comprises a rectangular frame and a grid frame fixedly connected in the rectangular frame, wherein the grid frame divides the interior of the rectangular frame into a plurality of cells, and an annular baffle frame is fixedly arranged on the front and rear faces of the rectangular frame respectively, and the front and rear annular baffle frames are clamped with the grid frame respectively to form a front and rear energy absorption space, and a rectangular bottom plate is arranged in each of the two energy absorption spaces, and a side of the bottom plate facing away from the grid frame abuts against the annular baffle frame so that the bottom plate cannot escape from the annular baffle frame outwardly, and a side of the bottom plate facing away from the grid frame also protrudes outwardly to form a rectangular convex plate, and the outer edge of the convex plate is slidably fitted and connected with the inner edge of the annular baffle frame, and a plurality of cells are also arranged in the utility model A sleeve, the sleeve is fixed on the grid frame, a sliding rod for inserting the sleeve is fixed on the side of the bottom plate facing the grid frame, a sleeve is only inserted by one sliding rod, the bottom plate is slidably connected in the sleeve through the sliding rod, a plurality of limiting rings are fixed on the side of the bottom plate facing the grid frame, the limiting rings of the two bottom plates are aligned one by one in position, and each limiting ring is within the range of the vertical projection of the cell to the bottom plate, an elastic compression member is also provided in the cell, two ends of the elastic compression member are respectively arranged in two limiting rings that are aligned one by one in the two bottom plates, and the elastic compression member is in a compressed state when the bottom plate is against the annular baffle frame.

2. The energy absorption structure for civil air defense door according to claim 1, characterized in that: The grid frame is composed of a plurality of cross bars and a plurality of vertical bars which are staggered and connected to each other, and the cells are rectangular cells.

3. The energy absorption structure for civil air defense door according to claim 2, characterized in that: At least two sleeves are arranged in each cell, and the multiple sleeves in the cell are arranged in a centrally symmetrical manner with the center of the cell as the axis of symmetry.

4. The energy absorption structure for civil air defense door according to claim 1, characterized in that: The elastic compression member is a spring.

5. The energy absorption structure for civil air defense door according to claim 1, characterized in that: The elastic compression member is a shock-absorbing rubber block.

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